Ground consolidation method

FIELD: building, particularly to consolidate motor road bed, paving or slopes.

SUBSTANCE: method involves serially treating ground with 20% aqueous saponified tall pitch mixed with waste oil from motor car engines at t=50-100°C up to emulsion obtaining and with 10% aqueous calcium chloride solution; leaving ground as it is to provide full polymerization and compacting ground under pressure of not less than 15.0 MPa. Ratio between saponified tall pitch and waste oil is 1.0:0.01-0.1. Ratio between above emulsion and aqueous calcium chloride solution is 1:0.28-0.3. The invention is disclosed in independent claims.

EFFECT: increased strength and frost-resistance of consolidated ground.

8 cl, 1 ex, 5 tbl

 

The invention relates to the construction and can be used to consolidate the foundations, surfaces or slopes of roads.

A known method of fixing species, including serial or dual processing rocks in a stream of atmospheric air diesel oil or alkaline waste oil and 5 to 30% solution of calcium chloride or magnesium at a ratio of 1.0:0.3 to 1.0, respectively. If necessary, the breed advanced seal (patent RF №1794132, E 02 D 3/12, the Method of fastening rocks / Euiro, Bastic etc. - 4919128 from 14.03.91, publ. 07.02.93 bull. No. 5).

The disadvantage of this method is the low strength of docked breeds and high energy consumption associated with air flow.

The closest in technical essence and the achieved result is a method of fixing soil, comprising the sequential processing of the soil water solution of saponified taly peck (OTP) and calcium chloride, and then injection into the ground of compressed air in excess of the amount of geleobrazuyuschie solution (A.S. USSR №1574729, E 02 D 3/12, the Method of fixing soil / Mthermo and others - application No. 4241152 from 08.05.87, publ. 30.06.90 bull. No. 24).

However, the known method has the following disadvantages:

1) when handling soil solutions OTP and chloride, calc the I in the precipitate instantly falls polymer; and during injection of air punching polymer through the pores of the soil difficult, the radius of the fixed soil is of 19.2 cm;

2) the resulting polymer has a low adhesion to soil particles and contains free water, which is decreasing the moisture content of the soil is removed from the polymer with significant shrinkage, leading to softening of the ground;

3) the resulting polymer has a high brittleness and impact on soil dynamic loads, such as motor transport, and alternating temperatures is loss of strength and decreased frost resistance;

4) this method is complex and energy-intensive.

The aim of the invention is to increase the strength and hardiness of fortified soil.

This object is achieved in that way strengthen the soil, comprising the sequential processing of the soil water solution of saponified taly peck (OTP) and calcium chloride, before processing the soil an aqueous solution of saponified taly tar pitch is mixed with the spent motor oil car engines at t=50-100°C in the ratio of 1.0:0.01 to 0.1 to obtain the emulsion, and after the introduction of calcium chloride soil incubated until complete polymerization and compacted at a pressure of not less than 15.0 MPa. And for the processing of the soil used 10% R is the target of calcium chloride.

The ground before processing loosen the depth of processing.

To obtain emulsions using a 20% solution of the CCP. The emulsion flow rate based on saponified taly pitch for treatment of soils is 0.08-0.25 kg/kg of soil, including for processing loose soils 0.08 to 0.11 kg/kg soil; for processing of cohesive soils 0.12 to 0.25 kg/kg of soil. And as a solution of calcium chloride use drainage brines.

The boundary limits of the quantitative content of the spent motor oil car engines in the emulsion substantiated experimentally. The data in table 4 gr-9 (indicators frost resistance and compressive strength and Flexural reinforced soil). The optimum ratio of 20% solution of saponified taly peck and used engine oils car engine 1:0,055.

Saponified taly peck (OTP) is a waste of pulp and paper production and in normal conditions is a product of hard consistency density of 0.95-1.0 g/cm3with the softening temperature of 60-75°and complies With THE 13-0281078-146-90 "peck taly saponified". It is nontoxic, nonflammable, convenient for transportation. Dissolving in fresh water, OTP forms a colloidal solution.

In the process of automobile motors engine oils that meet GOST 12337-84 "motor Oil is La diesel engines" brand M-10G 2and GOST 10541-78 "motor Oil for gasoline engines" brand M-8V1under the action of high temperatures and oxygen are oxidized with the formation of resins, asphaltenes, carbenes, admixtures and water. After 250 hours of engine operation is performed to change the oil in the engines. Table 1 shows the characteristics of the spent motor car oils. For areas with complex transport scheme, such as the Far North, the return of spent motor car oils for regeneration is problematic. Their utilization according to paragraph 2 of article 51 of the Federal Law "On environmental protection" dated 10.01.2002 was banned. The use of waste oils in cooking OTP will, in addition to their disposal to address issues of soil consolidation.

To obtain emulsion-based solutions saponified taly peck and waste motor oil car engines mechanically mixed at t=50-100°C. When the temperature of the mixture is less than 50°With the emulsion during storage stratified. Maximum temperature is limited by the boiling point of the emulsion. The choice of 20% concentration solution of the OTP by the maximum flow rate of dry matter to obtain stable emulsions. When the soil is consistently emulsion and a solution of CaCl2develops polymers high adhesion, elastic properties, improves the structure of soil to form a durable and frost patterns. This is because the oil film slow down the polymerization processes of the soil in the early stages of structure formation and technologically simplify the complete processing of the soil particles with a solution of CaCl2because is not instant vysalivaniya polymer.

The use of a 10%solution of CaCl2due to its penetration into the soil. Drain the brine, mainly containing chloride salts of calcium, magnesium and sodium, are wastes in the development of kimberlite pipes and require disposal. Use them in ways to strengthen the soil will help to solve questions on the ecology of the region and reduce the costs of implementing method.

In further compaction of the treated soil (pressures greater than 15.0 MPa) from the soil, removes the excess water and binder - polymer - almost dehydrated, while maintaining high adhesion and elastic properties.

The ground before processing can be loosened to a depth of impregnation or processed without destroying the original structure of the soil, for example, to strengthen the slopes of roads, etc.

Examples of specific implementations

As the soil was tested cohesive soil (clay loam) and non-cohesive soil (quartz sand).

characteristics of the soil

1. Cohesive soil (clay loam)

Table 1
Granulometric composition of loam
Sieve, mm20151052,51,250,630,310,14<0,14The number of plasticity
Private balance, %623925,514,510,76,48,714,28

2. Non-cohesive soil (quartz sand)

Table 2
Granulometric composition of the sand
Sieve, mm52,51,250,630,310,14<0,14The number of plasticity
Private balance, %1426,311,420,810,65,211,70

The soils before the test were dried.

As used motor oil car engines were used oils grades M-0R 2CA and M-8B1.

Table 3
Characterization of waste motor oil car engines
IndicesOil, %Resin %Asphaltenes, %Carbenes %Impurities, %Water %
Waste motor oil brand M-10G277,42,62,11,61,614,7
Waste motor oil brand M-8B1an 80.21,82,31,71,812,2

As potassium chloride solutions were applied to the solution of calcium chloride or drainage brines 10%concentration.

The composition of the drainage brines:

CaCl2- 80%, MgCl2- 9%, NaCl - 11%.

As a component of the binder was applied saponified taly pitch corresponding to THE 13-0281078-146-90 "peck taly saponified". A solution of saponified taly peck 20%concentration were prepared by mixing the solid concentrate in hot water t=80°C.

Emulsion saponified taly pitch prepared by mixing the spent motor oil automotive engine with t=20 With the number of 0,008; 0,01; 0,055; 0,1; 0,12; kg per kg of solution of saponified taly pitch with t=70°in a paddle mixer n=600 rpm for 3 minutes. The prepared emulsion was poured into a separate container for storage and future use.

Table 4 shows the results of tests of specimens for strength and frost resistance depending on the amount of waste motor oil car engines in emulsion-based OTP.

Experimentally found that for full vysalivaniya polymer ratio components: emulsion-based OTP and 10% CaCl2is 1:0,2. For complete impregnation of the soil solution of calcium chloride was administered in excess: 1:0,28-0,3.

The cultivation was carried out at the temperature of the soil and binder 20°in laboratory blade mixer; the soil was initially mixed with emulsion-based OTP for 40 seconds, then with a 10% solution of calcium chloride for 1 min and maintained until complete polymerization of 20 minutes

From the mixture produced samples-cylinders size ⊘ 72,5×72,5 mm and sample-balocchi size 40×40×160 mm under pressure of 15.0 MPa. Water-saturated samples were tested after 7 days compressive and Flexural. In addition, samples of the cylinders before the test for frost resistance was kept for 28 days in a moist environment. The coefficient frost resistance determi is lalsa to reduce the strength of the samples under compression after 50 cycles of freezing and thawing". Table 5 shows the results of tests of specimens for strength and frost resistance, depending on the flow rate of the emulsion-based OTP and potassium chloride solution.

On the basis of experimental data, see tables 4 and 5, we can draw the following conclusions.

When handling soils emulsion-based OTP (at a ratio of 1:0.01 and 0.1) and potassium chloride solution reached the main indicators of reinforced soil exceeding regulatory requirements SNiP 2.05.02-85*. At small flow of waste motor oil car engines in emulsions (formulations 1, 6, 11, 16) compressive strength increases in the future remains unchanged, but the limit of the tensile strength in bending (Rtechnologyand cold-resistance coefficient (KMDE) less than required by the SNiP 2.05.02-85*. With increasing boundary limits of consumption, waste motor oil car engines in emulsions (formulations 5, 10, 15, 20) ultimate tensile strength in bending (Rtechnologyand cold-resistance coefficient (KMDE) decrease less than required by the SNiP, and the compressive strength decreases, but remains above the required SNiP 2.05.02-85* (table 4).

When the flow rate of the emulsion for the treatment of soils in the amount of 0.08 to 0.25 is achieved (RSGRtechnologyToMDEexceeding the standard indicators SNiP. If Uwe is icenii of emulsion flow rate is above the upper limit (compounds 5, 10, 15, 20, table 5) increases humidity, which complicates the technology of compacting soil when performing road construction works: before the seal is required drying of the soil to an acceptable moisture content. When conducting drying indicators of soil samples exceed the standard.

When reducing the flow rate of the emulsion is less than the lower limit (compounds 1, 6, table 5) decreases the limit of the tensile strength in bending (Rtechnologyand cold-resistance coefficient (KMDE) less than required by the SNiP 2.05.02-85*. When handling cohesive soil emulsion-based OTP in the range of 0.08-0.1 humidity of samples insufficient for aggregation (table 5).

Compared with the prototype of strength and frost resistance of reinforced soil by the proposed method is more than 2 times.

Table 4
The results of tests of specimens for strength and frost resistance depending on the amount of waste oils in the emulsion
number ofThe ratio of the components in the emulsion weight. hComponents consumption, kg/kg soilThe strength of water-saturated samples, MPaCold-resistance coefficient, KMDE
20% aq OTPwaste oil brandEmulsion-based OTP10% solution of CaCl2Compression, RSGFlexural, Rtechnology
M-8B1M-10G27 days7 days
The soil-sand
110,008-0,0950,273,40,500,50
210,01-0,0950,273,40,650,70
310,055-0,0950,273,20,850,80
410,1-0,0950,272,80,700,70
510,12-0,0950,272,00,550,55
610,080,095 0,273,40,520,52
710,010,0950,273,40,600,62
810,0550,0950,273,20,800,78
910,10,0950,272,60,650,70
1010,120,0950,272,10,550,50
the placeholder0,80,130,3
The soil is loam
1110,008-0,180,0544,00,550,58
1210,01-0,180,054the 3.80,800,75
1310,055-0,180,0543,71,10,90
1410,1- 0,180,0543,41,00,80
1510,12-0,180,0542,60,570,52
161-0,0080,180,0544,00,550,58
171-0,010,180,054the 3.80,820,75
181-0,0550,180,0543,71,10,90
191-0,10,180,0543,30,70,80
201-0,120,180,0543,00,550,57
the placeholder1,00,240,44

0,80
Table 5
The results of tests of specimens for strength and frost resistance, depending on the flow rate of the emulsion-based OTP and consumption is lorilleux solutions
Components consumption kg/kg soilHumidityThe strength of water-saturated samples, MPaFactorNote
number ofEmulsion-based OTP10% solution of calcium chloride10% drainage brinessoil after treatment, %compressionFlexuralhardiness,MDE
7 days7 days
The soil-sand (non-cohesive soil)
10,070,021-7,52,40,500,50

Soils

composition 5, 10

before

manufacturer

samples

dried up

humidity

11%.
20,080,024-8,63,00,790,70
30,090,027-9,63,20,86
40,110,033-11,53,00,850,75
50,12being 0.036-12,83,00,850,75
60,07-0,0217,52,50,500,50
70,08-0,0248,63,00,800,70
80,09-0,0279,63,30,880,78
90,11-0,03311,53,10,860,75
100,12-being 0.03612,83,10,860,75
The soil is a loamy soil (cohesive soil)
110,110,033-11,73,00,520,55



Soils

composition 15,

20 before

manufacturer

dried up

humidity

26%.
120,12being 0.036-12,83,20,900,80
130,180,054-19,2the 3.81,150,9
140,250,075-26,73,71,00,85
150,260,078-27,83,71,000,85
160,11-0,03311,72,90,800,55
170,12-being 0.03612,83,10,900,78
180,18-0,05419,23,71,10,9
190,25-0,07526,73,51,00,85
200,26-0,07827,83,51,00,85

1. The way to strengthen the soil, comprising the sequential processing of the soil water solution of saponified what about taly peck OTP and 10%aqueous solution of calcium chloride, characterized in that before the treatment of the soil 20%aqueous solution OTP mixed with spent engine oil from automobile engines at t=50-100°C in the ratio of 1.0:0.01 to 0.1 to obtain emulsion, the above emulsion and a solution of calcium chloride is used in a ratio of 1:0,28-0.3, and after this processing, the soil can withstand up to complete polymerization and compacted at a pressure of not less than 15.0 MPa.

2. The method according to claim 1, characterized in that, as specified solution of calcium chloride use drain brine.

3. The method according to claim 1, characterized in that the soil prior to the specified processing loosen the depth of processing.

4. The method according to claim 1, characterized in that the flow rate specified emulsion is 0.08-0.25 kg/kg of soil.

5. The method according to claim 4, characterized in that for the specified processing non-cohesive soils consumption specified emulsion is 0.08-0.11 kg/kg of soil.

6. The method according to claim 4, characterized in that for the specified processing cohesive soil consumption specified emulsion is 0.12-0.25 kg/kg of soil.

7. The method according to claim 1, characterized in that for the specified processing non-cohesive soils consumption of the specified solution of calcium chloride is 0,024-0,033 kg/kg of soil.

8. The method according to claim 1, characterized in that for the specified processing cohesive soil consumption of the specified solution of calcium chloride is being 0.036-0,075 the g/kg of soil.



 

Same patents:

FIELD: consolidating by placing solidifying or pore-filling substances in the soil, particularly to compact ground for following foundation erection, to lift large or heavy structures to repair settled structures, to obtain over-consolidation of some ground types.

SUBSTANCE: method involves introducing substances expanding under chemical reaction and creating pressure exceeding 500 kPa in ground to be compacted or in ground under structure to be lifted. To introduce above substances a number of holes are made in ground, wherein above holes are separated one from another by gaps and arranged under lower front or under low structure base side. Said expandable substance to be injected in ground consists mixture of polyols and 4,4'-diphenylmethane diisocyanate or similar expandable agent, which begins to expand after 2-25 sec. Volume of expanded substance is 5 times greater than that of substance in un-expanded state. After that one may detect if predetermined compaction degree or structure lifting height are obtained and substance introduction is stopped if above predetermined values are obtained. The invention is developed in independent claims.

EFFECT: reduced costs.

18 cl, 1 tbl, 5 dwg

FIELD: mining industry.

SUBSTANCE: backfill fibrosolution consists of concrete, argil, fibers and water, as fibers solution contains synthetic filaments with diameter 0,1-0,15 mm and length 10-20 mm in amount of 10-20 kg for 1m3 of argil-cement mixture, subjected to electrification with induction of static electric charge.

EFFECT: possible backfill of extensive fractured systems with active influx of water, increased hardness of backfill material, decreased material costs of reinforcement of fractured rocks, removal of water influxes in mines.

2 ex

FIELD: hydraulic structure building, particularly to recover water-tightness of hydraulic structure composed of low-temperature ground and rock, especially in permafrost areas, to repair watertight diaphragm of ground dam built in permafrost area.

SUBSTANCE: composition contains polyvinyl alcohol taken in amount of 3-10% by weight, boric acid taken in amount of 0.2-1.0% by weight, remainder is water.

EFFECT: increased efficiency and structural stability of the composition during freezing and thawing thereof.

1 ex, 2 tbl, 3 dwg

FIELD: building material production in hydraulic and industrial building, particularly to erect bases for weirs, dams, as well as motor road beds and so on.

SUBSTANCE: composition comprises dewatered sandy deposits obtained during aluminous material production. The deposits include ferric oxide in amount of 30-75% by weight, aluminum oxide in amount of 10-40% by weight, silicon oxide in amount of 0.5 % by weight, titanium oxide, sodium oxide, phosphorus oxide and bound water in amount of 1-20% by weight. The deposits contain not less than 80% of particles having sizes exceeding 0.1 mm.

EFFECT: possibility of waste utilization and reduced costs of structure erection.

1 ex

FIELD: road building, particularly to form motor road and railroad bed, all-purpose areas and garden walks.

SUBSTANCE: ground consolidation composition comprises gypsum, cement, lime and mineral additive, namely smoke black. Blast-furnace slag and basalt fibers are additionally added to the composition. Gypsum is taken in amount of 35-42% by weight, cement - 9-14% by weight, blast-furnace slag - 9-14% by weight, basalt fiber - 0.1-1.0% by weight and smoke black - 17-22% by weight. Method of composition usage for road building is also disclosed.

EFFECT: increased strength and water resistance, frost resistance, possibility to perform all road building and repair operations with the use of above composition, reduced road building and repair costs and improved road paving quality.

3 cl, 4 ex, 3 tbl

FIELD: building, particularly collapsible ground wetting for building base consolidation.

SUBSTANCE: method involves forming pit; creating water-tight screen and filling pit with water. Water-tight screen is formed by driving injectors in ground along building site contour and supplying high-pressure water and then water-cement or sand-cement grout by injectors. To fill pit with water water-supply injectors are driven in ground so that the water-supply injectors are uniformly distributed over zone defined by water-tight screen. High-pressure water is injected through the injectors after grout hardening.

EFFECT: reduced time of ground wetting.

2 dwg

FIELD: building, particularly soft ground consolidation.

SUBSTANCE: method involves forcing injector in ground; supplying consolidating penetrative mortar in ground under pressure, which provides ground structure disintegration in soft grounds to create compacted area; repeatedly forcing injector in ground to form consolidation zones adjoining previous one to consolidate water-logged ground. The mortar comprises filler having density less than water density. Filter to remove water from area to be compacted is forced in ground before mortar injection.

EFFECT: extended field of method implementation along with increased operational reliability and efficiency.

1 ex

FIELD: improving or preserving soil or rock, particularly to reinforce railroad ground bed base.

SUBSTANCE: method involves forming drainage holes and removing accumulated water from railroad bed via the drainage holes; deepening injectors in ground from railroad bed side opposite to drainage holes or between them; forcedly water removing from railroad bed voids via drainage wells by directly injecting hardening mortar towards drainage wells through injectors.

EFFECT: increased efficiency of water removal from railroad bed and consolidation thereof.

1 ex, 2 dwg

FIELD: building, particularly pile foundations including floating piles.

SUBSTANCE: method involves injecting hardening mortar via injectors driven in ground in area between the piles and at pile ends for depth exceeding 1-2.5 m, wherein the injectors are spaced 1.5-2.0 meters apart. The hardening mortar pressure gradually increases. The hardening mortar is injected up to creation of hydraulic fracture cavities having 1.5-2.0 m radii around each injector. Then the injection operation is preformed under constant pressure of 2-10 atm to consolidate and reinforce ground, compress the piles to multiply load-bearing capacity thereof by 1.5-2 times.

EFFECT: increased load-bearing pile capacity due to increased side friction and head resistance.

3 cl, 1 dwg

FIELD: building, particularly to consolidate frozen ground in thawed zone under building foundation.

SUBSTANCE: method involves driving injector in ground; injecting consolidation penetrative mix under pressure, which provides ground structure in weakened ground zones and ground compaction along compacted zone perimeter; following injector driving to create compacted zones adjacent above zones. The consolidation penetrative mix is cooled salt solution comprising filler of material having lesser heat conductivity in comparison with ground to be compacted.

EFFECT: extended field of method application, increased reliability and efficiency.

5 cl, 1 ex, 1 dwg

FIELD: building, particularly to consolidate motor road bed, paving or slopes.

SUBSTANCE: method involves serially treating ground with 20% aqueous saponified tall pitch mixed with waste oil from motor car engines at t=50-100°C up to emulsion obtaining and with 10% aqueous calcium chloride solution; leaving ground as it is to provide full polymerization and compacting ground under pressure of not less than 15.0 MPa. Ratio between saponified tall pitch and waste oil is 1.0:0.01-0.1. Ratio between above emulsion and aqueous calcium chloride solution is 1:0.28-0.3. The invention is disclosed in independent claims.

EFFECT: increased strength and frost-resistance of consolidated ground.

8 cl, 1 ex, 5 tbl

FIELD: chemistry.

SUBSTANCE: binding composition for processing material of solid particles with formation of solid aggregated matrix is prepared including the following stages: blending of polar solvent and additional quantity of urea; addition of emulsified bitumen; addition of ureaformaldehyde precondensate; addition of other binding promotors in order to enhance bonding between the binding composition and solid particles; addition of sugar into weak organic acid; addition of weak organic acid mixed with sugar with formation of the binding composition; blending of binding composition with solid particles, which harden during over 30 minutes while mixing with above mentioned material of solid particles, besides weak organic acid is being chosen to ensure pH value of binding composition from 2.0 to 5.3.

EFFECT: binding composition was prepared for processing of materials of solid particles.

51 cl, 15 dwg, 3 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: sorbent is produced by initiating radical polymerization of acrylic monomers in the presence of bentonite in an aqueous medium with stirring. The monomer mixture consisting of acrylamide, dimethylacrylamide and acrylic acid, previously neutralized with an aqueous solution of potassium and ammonium hydroxides, is subjected to polymerization. Alikarboxycellulose is additionally introduced into the mixture of monomers. As a polymerization initiator, a redox system consisting of ammonium persulfate and tetramethylethylenediamine is introduced into the mixture. The process is carried out with stirring at a speed of 300-500 rpm at 30-45°C.

EFFECT: invention makes it possible to obtain a sorbent with improved characteristics.

1 dwg, 5 tbl

FIELD: agriculture.

SUBSTANCE: sorbent contains a polymeric matrix based on acrylamide, N,N'-dimethylacrylamide and acrylic acid, and a filler - bentonite. The ratio of polymer matrix: bentonite is from 1:0.05 to 1:1 of mass fractions. As a cross-linking agent, a vinyl derivative of polysaccharides and acrylic acid neutralized with the mixture of potassium and ammonium alkali with the neutralisation degree of 0.7-0.9 are used.

EFFECT: invention allows to obtain a sorbent with high moisture retention indices at an elevated soil temperature.

2 tbl

FIELD: road construction.

SUBSTANCE: device has towed device with platform, connected to moving gear, tank for reinforcing liquid, force pipes with bars with apertures in lower portion. Bars are made of conical shape with screw blades, mounted on a platform made in form of slides, and radiuses of bars effect overlap. In back portion of platform a screw is mounted. Tank for reinforcing liquid is placed in front portion of platform and by gear pump is connected to distributing comb, each force pipe, which through locking armature is connected to appropriate bar. Bars in amount no less than three are kinematically connected to each other, and to shaft for drawing power from moving gear, to screw and to gear pump for feeding reinforcing liquid.

EFFECT: higher efficiency.

4 dwg

Heated pile // 2250302

FIELD: heat engineering constructions.

SUBSTANCE: invention can be used as supports of different construction on permafrost. Proposed heated pile has reinforced concrete or metal shaft with inner or outer heated pipe in form of ribbed evaporator and condensers provided with metal strip ribbing arranged over ground surface with inclination to vertical part of shaft. Novelty is that heated pile is made T-shaped, and heated pipe in form of ribbed evaporator is made symmetrically double relative to axis of shaft with connection of some ends or its evaporators, other ends being connected with condensers. Evaporator ribbing is made in form of upward convex ring surfaces with central passes secured on inner surfaces of walls of heated pipe evaporators and uniformly distributed in height, and metal strip ribbing of condensers is element of horizontal part of T-shaped heated pile.

EFFECT: improved efficiency of heated pile, facilitated replacement of pile in case of failure.

2 cl, 4 dwg

FIELD: protection of ground and underground water pollution with toxic chemical substances, particularly forming antifiltering screens around waste disposal areas, dumps, for producing water reservoirs, building vessel coatings, mud reservoirs and store facilities for oil products and building materials.

SUBSTANCE: method involves forming water-proofing mixture including polyethylene waste; laying thereof on store facility base and heat treating the mixture under temperature of mixture or upper store facility layer melting. The mixture includes waste polyethylene in amount of 70-99% and polypropylene in amount of 1-30%.

EFFECT: improved ecological safety and manufacturability, reduced cost for antifiltering screen forming, increased strength, reliability and extended trouble-free service life.

FIELD: building, particularly for reinforcing foundations and cast-in-place piles forming.

SUBSTANCE: device comprises percussion assembly including pneumatic drift and case surrounding thereof, as well as pipeline with pump. Case is rigidly secured to percussion assembly. Case comprises orifice made in front part thereof and adapted for receiving plug. Defined between the plug and the front part is cavity having cross-sectional area equal or more than that of pipeline located between percussion assembly and the case. Case has members for forming holes in ground located along longitudinal case axis and extending in radial direction thereof. The members have low rigidity and may be bent in radial direction. The members are provided with grooves formed in bending line thereof and rest brought into contact with case in extreme position.

EFFECT: increased efficiency.

7 cl, 7 dwg

FIELD: building, particularly for reinforcing soft and sagging ground at deep locations during building foundation construction and reconstruction, for protection of sliding natural slopes, as well as artificial dam, pit and trench slopes.

SUBSTANCE: method involves forming cylindrical cavity from ground surface; reinforcing cylindrical cavity walls by means of soil pipe and injecting hardening mix by pumping thereof into ground through injector. In the case of consolidating ground having high thickness cylindrical cavity is formed and reinforced with the use of soil pipe by vibratory driving thereof in ground. Soil pipe has auxiliary tube arranged coaxial to soil pipe and having outer diameter determined from a given relation. When soil pipe reaches upper boundary of soft ground layer to be consolidated the auxiliary tube is removed from soil pipe. Injector is deepened for the full soft ground layer thickness through the soil pipe and hardening mix is intermittently fed through the injector. After each hardening mix feeding operation injector is lifted for height corresponding to next gap to be filled with the mix. All injection operations in one consolidation point are performed during relaxation of ground compacted by soil pipe and injector driven in ground.

EFFECT: increased capacity, reduced time and labor inputs, improved technological effectiveness.

3 cl, 4 dwg, 2 ex

FIELD: building, particularly to consolidate building or building structure foundation base.

SUBSTANCE: method involves driving injectors in ground; supplying high-pressure grout through ejectors; recording and measuring mortar pressure and forming grout body. Grout is injected simultaneously through at least three injectors installed along straight line and spaced equal distances one from another. The distances are equal to 5-10 injector diameters. Vertical grout body orientation is provided by driving injectors up to given mark reaching with following partial lifting thereof for height equal to 10-20 injector diameters and with their fixation at predetermined level before start of grout ejection process.

EFFECT: increased efficiency of ground base consolidation for ground of all types due to performing ground compaction along with forming vertical grout body of predetermined shape.

4 dwg, 2 ex

FIELD: building, particularly to consolidate building or building structure foundation base.

SUBSTANCE: method involves driving injectors in ground; supplying high-pressure grout through ejectors; recording and measuring mortar pressure and forming grout body. Grout is injected simultaneously through three injectors installed in apexes of imaginary equilateral triangle with side dimensions equal to 5-10 injector diameters. Grout body forming is performed by driving and following lifting injectors for height equal to 1-3 injector diameters before start of grout supply to ejectors.

EFFECT: reduced labor inputs and increased efficiency of ground base consolidation due to providing of predetermined grout body shape in horizontal grout breaking plane.

3 dwg, 1 ex

Up!