Method of waterproofing lining tunnels
(57) Abstract:The invention relates to the field of construction and is designed to prevent the ingress of groundwater into the transport tunnels. Technical result provided by the invention is to improve the quality of waterproofing. Method of waterproofing lining of tunnels includes sealing the end portion of the gap between the lining and production, injection waterproofing solution in the space between the production casing through the holes in the lining. What's new is that the end part of the gap between the lining and the elaboration of a seal thrust ring with the sealing pneumosinus, and through the holes in the lining of the pump by the hydraulic pressure of 2.0-2.5 MPa waterproofing solution. 2 Il. The invention relates to the field of construction and is designed to prevent the ingress of groundwater into the transport tunnels.There is a method of covering and waterproofing elements of precast concrete lining waterproofing-bitumen, asfaltobetonnyj mastics, epoxy resin and other waterproofing materials that are applied by the method of spraying.The disadvantage of this method is vozmozhnostuvelichivat sealing joints and waterproofing (Velichkin E. A., Lenets P. T. Construction of tunnels and subways. - M.: Transport, 1971, S. 57).There is also known a method membrane waterproofing surfaces of the lining of several layers of rolled material, glued mastic (Velichkin E. A., lenets P. T. Construction of tunnels and subways. - M.: Transport, 1971, S. 57).The drawback of this method is a small mechanical strength and complexity of operations.There is a method of injection mortar for the lining with the aim of filling the gap between the outer surface of the lining and output generated during passage in communication breeds ( Velichkin E. A., lenets P. T. Construction of tunnels and subways. - M.: Transport, 1971, S. 60).The disadvantage of this method is the need for additional waterproofing of the outer surface of the lining.The prototype of the invention is a method of compacting an annular part of the gap between the lining and the production and injection waterproofing solution in the space between the production casing through the openings in the lining (see SU 194135, 29.05.67).The disadvantage of the prototype is the lack of resistant waterproofing solution for injection solution without special is ptx2">The invention is aimed at improving the quality waterproofing.The problem is solved due to the fact that in the method of waterproofing lining comprising sealing the end portion of the gap between the lining and production, injection waterproofing solution in the space between the production casing through the openings in the lining, the end part of the gap between the lining and the elaboration of a seal thrust ring with the sealing pneumosinus, and through the holes in the lining of the pump by the hydraulic pressure of 2.0-2.5 MPa waterproofing solution.In Fig. 1 shows a lining, the cross section of Fig. 2 is a longitudinal section.The method is as follows.In formulation 1 install reinforced concrete lining 2 of the segments or rings, interconnected during Assembly on a cement-sandy solution. Through the 90ostarting from the bottom of the lining, and drilled the screw holes, which have built-in nozzles 3. The ring part of the gap between the lining and the output choke support ring 5 with the sealing rubber tire 6.Injection waterproofing mortar for the lining is as follows.Into the internal cavity of the rubber is RA between the lining 2 and output 1.The lower pipe 3, the lining 2 is connected with a hydraulic booster (not shown) and in the space behind the lining upload waterproofing mortar for patent N 1671637 containing wt.%: portlandcement 20,0 - 26,0; water - the rest. Injection waterproofing solution continues until the last in the lateral pipe lining 2.Then the power switch to the side nozzles and injection solution is performed until the solution in the upper pipe lining.Thus, the gap between the lining 2 and output 1 is filled from the bottom to the top of a waterproofing solution that allows after hardening to receive waterproofing layer with high resistance. Method of waterproofing lining of tunnels, including the seal end part of the gap between the lining and production, injection waterproofing solution in the space between the production casing through the openings in the lining, characterized in that the end part of the gap between the lining and the elaboration of a seal thrust ring with the sealing pneumosinus, and through the holes in the lining of the pump by the hydraulic pressure of 2.0 - 2.5 MPa waterproofing solution.
FIELD: mining industry, particularly to protect mine workings against underground water ingress.
SUBSTANCE: method involves drilling injection wells along pit shaft perimeter; widening cracks by supplying high-pressure water and injecting grouting mortar in the cracks; additionally boring vertical preparation well in pit shaft center. Cracks are widened by feeding water and then air or only water in vertical preparation well. Water and air are supplied under pressure lesser than pressure of hydraulic rock fracturing. Grouting mortar is injected in cracks by forcing thereof through injection wells immediately after finishing of feeding water or air in vertical preparation well. Cryogenic gel is used as the grouting mortar. Cryogenic gel is foamed before injecting thereof in wells and foamed cryogenic gel is forced into cracks beyond the pit shaft perimeter by supplying compressed air in vertical preparation well. After leaving pit shaft as it is for grouting mortar setting time wells are sunk for the next grouting step depth and above operations are repeated up to reaching the lower boundary of pit shaft interval, wherein injection is performed under pressure exceeding that on previous step.
EFFECT: reduced labor inputs and material consumption along with increased efficiency of water suppression.
3 cl, 3 dwg, 1 ex
FIELD: mining industry, particularly elimination of emergency situations.
SUBSTANCE: method involves closing borehole cross-section with extendable means; arranging predetermined volume of non-combustible material above the means, wherein the volume is determined from a given relation; discharging all non-combustible material in the borehole at a time and further distributing portions of non-combustible material having volumes of not less than volume of incoming water. Non-combustible material includes clay and pourable components which are laid in layers above the means, wherein clay volume is equal to pore volume of pourable component.
EFFECT: increased reliability of borehole sealing and water burst liquidation.
3 dwg, 1 ex
SUBSTANCE: water-proofing sheet comprises three layers. The first layer provides mechanical strength of the sheet and is made of elastometer polyethylene of high strength and flexibility. The second layer is intermediate one, represents the connection between the first and second layers, and is made of foam plastic with closed pores. The third layer is made of a impermeable plastic material which possesses high resistance to breaking. The tensile strength, breaking elongation, and thickness of the sheet range from 24 MPa to 39 Mpa, from 550% to 900%, and 3 mm to 50 mm, respectively.
EFFECT: enhanced reliability.
5 cl, 2 dwg, 3 tbl
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.
FIELD: mining, particularly mining and pit protection against underground water inflow in the case of open-pit kimberlite pipe and other mineral deposits development in subpermafrost horizon.
SUBSTANCE: method involves discharging water initially contained in deposit section to be developed and precipitation water from said deposit section; drilling injection wells around kimberlite pipe perimeter and performing explosions through regular system from pit bottom to create joined subvertical annular and subhorizontal rock fissured zones which have uniform fissures; supplying plugging materials therein and creating joined solid watertight diaphragms shaped as integral cups.
EFFECT: possibility to create watertight diaphragm, which protects deposit section to be developed against underground water ingress.
FIELD: mining and pit protection against underground water inflow in the case of open-pit kimberlite pipe and other mineral deposits development in subpermafrost horizon.
SUBSTANCE: method involves discharging water initially contained in deposit section to be developed and precipitation water from said deposit section; drilling injection wells around kimberlite pipe perimeter and from pit bottom; performing explosions in wells surrounding kimberlite pipe perimeter and carrying-out hydraulic fracturing from wells drilled from pit bottom to create jointed subvertical and subhorizontal rock fissured zones, which have uniform fissures; supplying plugging materials therein and creating joined solid watertight diaphragms shaped as integral cups.
EFFECT: possibility to create watertight diaphragm, which protects deposit section to be developed against underground water ingress.
SUBSTANCE: method comprises leaving of massifs of minerals 14 between chambers 7-13, driven at extraction of potassium salt bed 1, and filling chambers with backfill material. Bores 6 are drilled from ground surface 5 to chambers; the bores are cased with tubes. Not soluble in water backfill material is supplied into chambers via bores 6 till chambers are filled for their complete height at a point of backfill material supply. The first to be filled are chambers 7 located at proximity to the underground water inrush zone 4 from the side of the bed rise 1 of potassium salt; thereafter filling of chambers 8-10 located below underground water inrush 4 is carried out. Not solved in water, hardening, backfill materials are supplied into chambers 7-13 via bores 6. If filed chambers driven along the course of bed chambers have considerable length, the distance between bores is determined from a calculated expression.
EFFECT: invention facilitates prevention of flooding of potassium mine and hazardous deformation of the earth surface at breaks of water protective strata and underground water inrushes into mine through water permeable cracks generated in water protective strata in areas of geological disturbances.
3 cl, 2 dwg
SUBSTANCE: invention relates to strengthening of the lower part of the section of the railroad tunnel and may be employed for strengthening of bases of buildings and constructions. Method includes feeding of mortar with filling agents. A shaft is drilled in the lower part of the section of the railroad tunnel above the detected emptiness for feeding of filling material and a second shaft for feeding of consolidating mortar. Feeding device is installed and filling material is supplied through it in the form of balls of waterproof material, density whereof equals or is greater than water density. Balls are compressed by means of a vibrations generator; entrained water is pressed out from the emptiness by balls either through holes in the rock or through the consolidating mortar feeding shaft. Having filled the emptiness with balls, feeding device is taken away and the shaft is sealed, consolidating mortar is supplied into the second shaft and having filled all the emptiness the shaft is sealed. Should there be no water in the emptiness one shaft is drilled in the lower part of the section of the railroad tunnel; where through emptiness are filled with balls compressed by a vibration generator, after that feeding device is taken away and consolidating mortar is supplied through the shaft. Emptiness been filled the shaft is sealed.
EFFECT: cost reduction of elimination of emptiness.
2 cl, 1 dwg
SUBSTANCE: invention refers to mining and is designed for elimination of hazardous situation at instantaneous inrush of water. Massif of rock is bored around with bore holes and outpost blast holes in vicinity of a groove head. Clay material is stacked inside the contour. Explosive substances are inserted in bore and blast holes; and explosion is initiated.
EFFECT: reduced time and material costs for preparation of non-combustible material to simultaneous discharge.
1 ex, 2 dwg
SUBSTANCE: device consists of panels, supports and water intake chute. The panels have U-shaped flanged cross sections. The flanges and ribs of panels are different with regard to the required width and height along the corresponding sides of U-shaped cross section. The upper support to the bearing lining fastener assembly and lower panels to support fastener assembly are spatially distanced and implemented so that canopy panels and effective canopy hanger can be remotely adjusted to the bearing tunnel lining regardless canopy panels width and lining elements width dimensions. The upper fastener assembly is provided with supporting element for assembling pin, for example, pivot block, with one end being fixed to the bearing lining by means of fastening element, for example, bolt and/or threaded pin and/or anchor. The other end is coupled with the assembling pin, by means of, for example, a pair of nuts with spherical surface and beveled washers. The lower panel to support fastener assembly is made from the supporting element and clamping element for panels and installed on the assembling pin. The panels are installed and fastened to ensure the required architectural geometry of arch and overflow conditions in the lower panel fastener assembly for water penetrating through the lining. The position of the lower fastener assembly is adjusted by the upper fastener assembly. The invention provides for different structural implementation of the upper fastener assembly and specific features of U-shaped panel profiles and lower fastener assembly for the includes tunnel and horizontal tunnel.
EFFECT: possibility of spatial assembling pin position adjustment and installation of canopy panels in designed position regardless arch configuration inaccuracies in underground structure; more effective, reliable and simplified hanger for canopy to be attached to bearing lining notwithstanding canopy panel width and lining width ensuring conditions of penetrating through lining water.
15 cl, 20 dwg