Reinforcement method for earth embankments of watered hydraulic structures

FIELD: building, particularly hydraulic structure reinforcement.

SUBSTANCE: method is performed in two-stages. The first stage involves forming vertical elongated flat ground massifs secured by hardening material. Massifs are created in crest embankment area and in upper area of embankment slope so that massifs are spaced minimal available distance from crest and pass through embankment body, including land-sliding upper embankment slope area. Massifs are anchored in mineral bottom by lower edges thereof and are arranged at least in three rows and there are at least three massifs in each row. Method for massifs forming involves driving double-slotted injectors directly in embankment ground or in wells formed in embankment and having plugged wellhead; orienting injector slots perpendicular to hydraulic pressure head vector direction in embankment area to be reinforced; injecting hardening material under increased pressure across horizons from top to bottom or in reverse direction, wherein injection is initially performed under 5-15 atm pressure and at minimal rate in each second injector of one outermost row beginning from extreme ones; feeding hardening material in previously missed injectors in this row; supplying injectors of another extreme row with hardening material in the same way; feeding hardening material to ejectors of medium rows under 10-20 atm pressure; performing the second reinforcement stage as material hardens to obtain 70% strength. The second reinforcement stage involves forming vertical elongated flat massifs of secured ground anchored in mineral bottom by lower edges thereof and arranged at least in three rows, wherein each one includes at least three massifs. Massifs extend at the angle exceeding embankment slope angle to horizontal line. Massifs are formed with the use of double-slotted injectors in remainder embankment area. Injector slots are directed perpendicular to hydraulic pressure head vector direction in embankment area to be reinforced. Hardening material is ejected in above succession, wherein hardening material pressure is equal to design process pressure enough for direction of feeding hardening material through injector slots and lesser than hardening material injection pressure of the first reinforcement stage.

EFFECT: increased reliability of structure reinforcement; prevention of land-slide on structure slopes.

3 cl, 3 dwg

 

The invention relates to the field of construction, in particular, to methods of strengthening of slopes and slopes flooded excavation hydraulic structures.

A known method of attachment of landslide slopes and earth structures by clutch slipping of soil layers with the underlying (the Description of the invention to the patent of Russian Federation №2080441 on CL 6 E 02 D 17/20). The method involves immersion in ground steel electrodes and their partial decomposition under the action of a constant electric current with the formation of electrochemical around them piles. While burying the electrodes produce angle of 15-90° to the slope and below the boundaries of the landslide layer to a depth of 0.5-5d, where d is the diameter of the electrochemical piles below the boundary of the landslide.

The disadvantage of this method is its limited applicability. The method is complicated, the strengthening of slopes and slopes barriers (dams) watered hydraulic structures due to the heterogeneity and periodic seasonal changes of vodonasyshennost soil from which it is erected earthen embankment. The depth formed by electrochemical piles may be insufficient due to placing them in plastic water-saturated soils excavation fencing waterworks. In addition, the formation of electrochemical piles in non-homogeneous soil will lead to inhomogeneous the tee structure, that will weaken the effect of fixing.

It is also known fastening landslide slopes of earthen structures produced by placing in different levels of landslide zones several transverse rows of vertical piles, which are used Spontini, forming a solid wall, propped up by the inclined piles in the upper part of the United gratings with spuntini (Patent No. 2122072 in class. E 02 D 31/08, E 02 D 29/02 from 03.04.1997 year). Spuntini equipped with a drainage system in the form of a layer of porous concrete, located between the lower and upper layers of dense concrete, and located between porous and dense layers of concrete horizontal groove. In the formation of the wall of Spontin is formed through discharging channel for dewatering the landslide area.

The disadvantage of this method is securing only landslide zones of the slope. Deeper layers of earth structures are strengthened, and the process of destruction of the embankment hydraulic structures, due to changing loads, a seasonal increase in water saturation of the soil or other subsurface shear processes are not terminated.

There is a method of creating a landslide protection works to strengthen landslide zones earthworks (RF Patent No. 2121040 class E 02 D 29/02 from 09.04.1997 year). According to the patent in landslide zones earthen structures the Oia at different levels of slopes are performing multiple series of vertical and inclined wells. In vertical and inclined wells are drilled piles, with vertical and inclined piles upper parts are connected by the gratings, and the angle of inclination of inclined wells exceeds the angle of the side surface of the slope.

A disadvantage of the known technical solution is strengthening unloaded, the side of the earthen structure that does not prevent processes weakening the mound in the result of a seasonal increase in water saturation of soils characteristic of embankments used as dams flooded hydraulic structures.

In addition, the consolidation of the upper layers of soil in landslide zones does not provide a large penetration of pile elements. The lower layers of the soil are not converted, and permeability of soils remains unchanged.

The technical result of the invention is to improve reliability of the strengthening of earthen embankments watered waterworks and prevention education on their slopes landslide sites.

This technical result is achieved due to the fact that the way to strengthen the earthen embankments hydraulic flooded structures according to the invention provides for the production of works for the reinforcement in two stages, the first of which programmewas the area of the body of the mound and the upper zone of the slope of the embankment with a maximum approximation to its crest is formed through the body of the mound, including landslide portion of the upper part of the slope of the mound, are connected by an anchor the bottom edge in the mineral bottom vertical elongated, spaced at least three rows and at least three in each row, planar arrays of fixed-hardening material of the soil, which is formed by dipping directly into the soil in the embankment or formed therein wells plugging their mouths, the two injectors, cracks are oriented perpendicular to the direction of the vector of hydraulic pressure to strengthen the area of the mound, the method of hardening the material by horizons top-down or bottom-up pressure, and initially produce injectiona under pressure 5-15 ATM and minimum feed rate of hardening of the material in the injectors of one of the extreme series, starting with extreme injectors in this series, in sequence, at least one, and then produce a flow of solid material missed in this series the injectors, and then in the same sequence to produce a flow of solid material in the injectors the other extreme of the range, and then to the injectors medium or medium series under the pressure of 10-20 bar, and after a set of hardening the material of these arrays is not less than 70% strength begin the second stage of consolidation, in which within the remaining part of the slope of the embankment Ormerod long, flat connected by an anchor in the mineral bottom arrays of fixed ground which also have not less than three rows, not less than three in each row at an angle to the horizontal greater than the angle of inclination to the horizontal surface of a fill slope, which also form through the two injectors, cracks are also oriented perpendicular to the direction of the vector of hydraulic pressure to strengthen the area of the mound, at the same time, injectiona hardening of the material in the series produced in the above sequence, and the supply pressure hardening of the material is set equal to the estimated technological sufficient pressure to the directional feeder hardening material through cracks injectors and a lower discharge pressure hardening of the material during the formation of long, flat vertical arrays of fixed ground in the first phase.

As the hardening material can be used pascariello mixture.

This long, flat arrays of fixed-hardening material of the soil can be performed with the ratio of length and width cross-section, constituting not less than 5:1.

Thanks to the maximum approximation of the vertical wells to the crest of the embankment and the depth of hardened mineral elements in the bottom of the waterworks is forming inside the embankment construction, arranged by type geotechnika the Noah patterns, formed of hardened elements, between which is formed a zone of compacted soil. Creating in the body of the mound Geotechnology structure due to the formation or restoration in long-operated embankments kernel, coming on the characteristics of the monolithic element having the castle area, buried in the mineral bottom. Creating or restoring an embankment cores, arranged according to the principles Geotechnology structure characterized by a high load capacity and stability, increases the reliability of strengthening the embankment.

In addition, due to the formation of hardened elements in vertical and inclined wells flat and burying them in the mineral bottom hydraulic structures in the body of the mound created wall construction that prevents the penetration of moisture in the soil, which also increases the reliability of strengthening of earthen embankments watered hydraulic structures.

Feed direction hardening mixtures in wells defined by the direction vector of the hydraulic pressure to be included in the process of forming flat hardened elements of the force of the hydraulic pressure acting in flooded hydraulic structures on the surface of an earthen embankment.

Excessive feed pressure hardening of the material in the wells of the inner vertical R is Dov, carried out to form a flat hardened pile elements in compacted extreme series soils can improve prednamerennoe soil of the mound, which determines the strength characteristics Geotechnology patterns formed in the body of the mound, and increases the reliability of strengthening the embankment.

The inventive method is implemented in the “Proposal for strengthening the dam Shapsug interregional reservoir of the Republic of Adygea”, the essence of which is given as an example, illustrated in the accompanying drawings.

Figure 1 presents a cross-section of one of the hardened areas earthen mounds.

Figure 2 is a view in plan of one of the hardened areas of the mound.

Figure 3 - sketch of dvuhmatchevogo injector used in the formation of hardened elements in vertical and inclined wells.

The proposed method is carried out in the following sequence. The method for reinforcing an earthen embankment hydraulic flooded structures involves the production of works for the reinforcement in two stages. The first of which programmewas the area of the body of the mound 1 and the upper zone of the slope of the mound 1, with a maximum approximation to its crest, form cutting through the body of the mound 1, including landslide site 2 the upper part of the slope of the mound 1, connected by an anchor the bottom edge in the mineral bottom 3 Vert is unique extended, located in at least three rows and at least three in each row, planar arrays 4 fixed hardening material 5, for example ischnocolinae mixture of soil. Arrays 4 form by dipping directly into the soil in the embankment 1 or educated in it well 6 by plugging their mouths, the two injectors 7, connect quick couplings with technological pipelines feeding hardening material (not shown). Crack injectors 7 are oriented perpendicular to the direction of the vector of hydraulic pressure to strengthen the area of mound 1.

The formation of hardened pile elements 4 in wells 1 vertical rows is performed by the injection of hardening material 5 by horizons top-down or bottom-up pressure. Height hardened horizons is from 1.0 to 2.0 meters Before serving hardening material 5 through the injector 7 hole 6 plugging the soil to prevent break-curing composition 5 in the annular space. The number of horizons is determined by the height of the strengthening of the dam and the depth of the rocks mineral bottom waterworks.

While initially producing injectiona under pressure 5-15 ATM and minimum feed rate of hardening of the material 5 in the injectors 7 one of the extreme series, on the other extreme of injectors 7 in this series, in the sequence, at least one. After that make the flow of solid material 5 missed in this series the injectors 7, after which the same sequence to produce a flow of solid material 5 in the injectors the other extreme of the range, and then to the injectors 7 medium or medium series under the pressure of 10-20 ATM. After a set of hardened material 5 arrays of 4 at least 70% strength begin the second phase strengthening. At the second stage within the remaining part of a fill slope 1 form a long, flat, connected by an anchor in the mineral bottom 3 arrays 8 fixed to the ground, which also have not less than three rows, not less than three in each row, at an angle to the horizontal greater than the angle of inclination to the horizontal surface of a fill slope 1. Arrays 8 are also formed through the two the injectors 7, the slots which are oriented perpendicular to the direction of the vector of hydraulic pressure to strengthen the area of mound 1. Injectiona hardening material 5 in the series produced in the above sequence, and the supply pressure hardening of the material 5 is set to the estimated technological sufficient pressure to the directional feeder hardening material 5 through the cracks of the injectors 7 and a lower discharge pressure hardening of the material 5 when forming the vertical is s a long, flat arrays 4 fixed ground on the first phase.

A long, flat arrays 4 and 8 fixed hardening material 5 soil do with the ratio of length and width cross-section, constituting not less than 5:1.

The proposed method for the strengthening of earthen embankments watered hydraulic structures through the creation or restoration in the body of the mound engine and lock in the form of Geotechnology patterns embedded in the mineral bottom 3 facilities, will help to strengthen the dam has long operated reservoirs, while significantly reducing the time device earthen embankments and energy costs of their construction, by simplifying the process of forming the core and the castle in the body already filled embankments. The use of the proposed method is feasible and in the construction of new waterworks.

1. A way to strengthen the earthen embankments watered hydraulic structures, characterized by the fact that it involves the production of works for the reinforcement in two stages, the first of which programmewas the area of the body of the mound and the upper zone of the slope of the embankment with a maximum approximation to its crest is formed through the body of the mound, including landslide portion of the upper part of the slope of the mound, are connected by an anchor the bottom edge in the mineral bottom vertical elongated, spaced at least three rows and at least three in each of the m row planar arrays of fixed-hardening material of the soil, which is formed by dipping directly into the soil in the embankment or educated in it well plugging their mouths the two injectors, cracks are oriented perpendicular to the direction of the vector of hydraulic pressure to strengthen the area of the mound, the method of hardening the material by horizons top-down or bottom-up pressure, and initially produce injectiona under pressure 5-15 ATM. and at a minimum feed rate of hardening of the material in the injectors of one of the extreme series, starting with extreme injectors in this series, in sequence, at least one, and then produce a flow of solid material missed in this series the injectors, and then in the same sequence to produce a flow of solid material in the injectors the other extreme of the range, and then to the injectors medium or medium series under the pressure of 10-20 ATM., and after dialing the hardening material of these arrays is not less than 70% strength begin the second stage of consolidation, in which within the remaining part of the slope of the mound to form a long, flat connected by an anchor in the mineral bottom arrays attached to the soil, which also have not less than three rows, not less than three in each row, at an angle to the horizontal plane, p is iisalmen angle of inclination to the horizontal surface of a fill slope, also formed through the two injectors, cracks are also oriented perpendicular to the direction of the vector of hydraulic pressure to strengthen the area of the mound, at the same time, injectiona hardening of the material in the series produced in the above sequence, and the supply pressure hardening of the material is set equal to the estimated technological sufficient pressure to the directional feeder hardening material through cracks injectors, and a lower discharge pressure hardening of the material during the formation of long, flat vertical arrays of fixed ground on the first phase.

2. The method according to p. 1, characterized in that the solidifying material use sand-cement mixture.

3. The method according to any of paragraphs. 1 and 2, characterized in that a long, flat arrays of fixed-hardening material of the soil is performed with the ratio of length and width cross-section, constituting not less than 5:1.



 

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FIELD: building, particularly hydraulic structure reinforcement.

SUBSTANCE: method is performed in two-stages. The first stage involves forming vertical elongated flat ground massifs secured by hardening material. Massifs are created in crest embankment area and in upper area of embankment slope so that massifs are spaced minimal available distance from crest and pass through embankment body, including land-sliding upper embankment slope area. Massifs are anchored in mineral bottom by lower edges thereof and are arranged at least in three rows and there are at least three massifs in each row. Method for massifs forming involves driving double-slotted injectors directly in embankment ground or in wells formed in embankment and having plugged wellhead; orienting injector slots perpendicular to hydraulic pressure head vector direction in embankment area to be reinforced; injecting hardening material under increased pressure across horizons from top to bottom or in reverse direction, wherein injection is initially performed under 5-15 atm pressure and at minimal rate in each second injector of one outermost row beginning from extreme ones; feeding hardening material in previously missed injectors in this row; supplying injectors of another extreme row with hardening material in the same way; feeding hardening material to ejectors of medium rows under 10-20 atm pressure; performing the second reinforcement stage as material hardens to obtain 70% strength. The second reinforcement stage involves forming vertical elongated flat massifs of secured ground anchored in mineral bottom by lower edges thereof and arranged at least in three rows, wherein each one includes at least three massifs. Massifs extend at the angle exceeding embankment slope angle to horizontal line. Massifs are formed with the use of double-slotted injectors in remainder embankment area. Injector slots are directed perpendicular to hydraulic pressure head vector direction in embankment area to be reinforced. Hardening material is ejected in above succession, wherein hardening material pressure is equal to design process pressure enough for direction of feeding hardening material through injector slots and lesser than hardening material injection pressure of the first reinforcement stage.

EFFECT: increased reliability of structure reinforcement; prevention of land-slide on structure slopes.

3 cl, 3 dwg

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