CN111828057B - System and process for repairing leakage water of high-speed railway or subway tunnel - Google Patents
System and process for repairing leakage water of high-speed railway or subway tunnel Download PDFInfo
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- CN111828057B CN111828057B CN202010749587.1A CN202010749587A CN111828057B CN 111828057 B CN111828057 B CN 111828057B CN 202010749587 A CN202010749587 A CN 202010749587A CN 111828057 B CN111828057 B CN 111828057B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- General Life Sciences & Earth Sciences (AREA)
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a system and a process for repairing leakage water of a high-speed rail or subway tunnel, which comprises the steps of judging the current leakage water condition of the high-speed rail and the subway tunnel; according to the condition of the leakage water, a corresponding repairing method is adopted to repair the leakage water; wherein: when the water leakage condition is judged to be water leakage of the segment splicing seam, repairing the water leakage by adopting a repairing method of deep water stopping and shallow reinforcing; when the condition of the leakage water is judged to be the water gushing of the segment splicing seam, repairing the leakage water by adopting a repairing method combining curtain solidification and deep water stopping and shallow layer reinforcement; and when the water leakage condition is judged to be water leakage at the bolt part of the segment, repairing the water leakage by adopting a structural plugging repairing method. According to the invention, corresponding waterproof and leaking stoppage schemes are determined according to different leaking water positions, and the problem of leaking water of the high-speed rail and subway tunnel segments is solved systematically by combining various materials and various processes.
Description
Technical Field
The invention relates to the technical field of building engineering, in particular to a system and a process for repairing leakage water in a high-speed rail or subway tunnel.
Background
The leakage water of the high-speed rail or subway tunnel is the most common engineering defect in the field of tunnel engineering at home and abroad at present, and in the operation process of the high-speed rail or subway, if the problem of the leakage water is not well treated, the leakage water not only directly affects the durability of the tunnel structure, but also can cause the damages of related equipment and facilities in the tunnel to different degrees, seriously affects the normal operation of the high-speed rail and subway, and even serious people can have driving safety hidden troubles. Through on-site investigation analysis, the position of leaking water mainly is tunnel segment concatenation seam and crab-bolt, and the reason that leaks and produce mainly has following several aspects: 1. due to inexperienced assembly of the duct pieces, damage and slab staggering occur in the duct piece assembly process; 2. the boot plate extrudes the water-stop batten of the duct piece when being pushed, so that the contact between the axis of the boot plate and the axis of the duct piece is not matched; 3. the boot plate rotates under the action of gravity, and the axis of the boot plate is not matched with the axis of the segment of pipe in a contact way; 4. the tightening torque is not enough to extrude the water stop strip to be compact due to the fact that the segment bolt is not tightened; 5. the vault is not filled and compacted during grouting; 6. and (4) cracking the pipe piece.
Therefore, the water leakage part must be comprehensively treated to ensure the normal operation of the subway and the high-speed rail and eliminate the potential safety hazard caused by the water leakage.
Disclosure of Invention
The invention aims to provide a system and a process for repairing leakage water in a tunnel of a high-speed rail or a subway, which are used for comprehensively treating the leakage water parts of the tunnel and solving the problem of the leakage water.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
A repair process for leakage water in a high-speed rail or subway tunnel comprises the following steps:
judging the current water leakage condition of the high-speed rail and the subway tunnel;
repairing the leakage water by adopting a corresponding repairing method according to the leakage water condition; wherein:
when the water leakage condition is judged to be water leakage of the segment splicing seam, repairing the water leakage by adopting a repairing method of deep water stopping and shallow reinforcing;
when the condition of the leakage water is judged to be the water gushing of the segment splicing seam, repairing the leakage water by adopting a repairing method combining curtain solidification and deep water stopping and shallow layer reinforcement;
and when the water leakage condition is judged to be water leakage at the bolt part of the segment, repairing the water leakage by adopting a structural plugging repairing method.
The repair system takes the soil cavity outside the segment, the segment splicing seam, the segment bolt water leakage part and the segment chipping and unfilled corner part as construction areas, and comprises a segment outside soil cavity repair system, a segment splicing seam repair system, a segment bolt part repair system and a segment chipping and unfilled corner repair system;
the repairing system for the soil cavity on the outer side of the duct piece takes the soil cavity on the outer side of the duct piece as a construction area, soil is filled in the soil cavity, and an epoxy grouting layer and a double-liquid grouting layer are sequentially arranged on one side, close to the duct piece, of the soil cavity outwards;
the repair system for the segment splicing seams comprises a deep water-stopping grouting layer, a shallow reinforcing grouting layer and a first epoxy sealant layer which are sequentially arranged in the segment splicing seams from bottom to top;
the repair system for the water leakage parts of the segment bolts comprises a first interface treatment layer arranged on a segment base layer, a quick water-stopping mortar layer arranged at the connecting part of the segment base layer and the bolts, a second epoxy sealing adhesive layer, an anti-rust layer and a high-strength repair mortar layer, wherein the second epoxy sealing adhesive layer is arranged on the quick water-stopping mortar layer and at the connecting part of the nuts and the screw caps, the anti-rust layer is arranged on the surfaces of the bolts, and the high-strength repair mortar layer is flush with the surfaces of the segments;
the duct piece chipping and unfilled corner repairing system comprises a second interface treatment layer and a repair mortar layer which are sequentially arranged at a duct piece chipping and unfilled corner part from bottom to top.
The system and the process for repairing the leakage water of the high-speed rail or subway tunnel have the beneficial effects that:
the invention determines corresponding waterproof and leakage-stopping schemes according to different water leakage parts, repairs and reinforces the water leakage parts, achieves the effect of protecting leakage by a new structure, can prolong the service life of the duct piece, and reduces potential safety hazards. When the problem of water leakage of the segment splicing seam is solved, deep polyurethane water-stopping grouting and shallow elastic epoxy grouting are combined for reinforcement. The water leakage position is stopped by the deep water-stopping grouting layer, and the water-stopping grouting layer is sealed and reinforced by the shallow reinforcing grouting layer, so that the problem of water leakage of the segment splicing seam is effectively solved. To the percolating water problem of section of jurisdiction bolt position, prevent through the antirust coat that the bolt from rustting, rethread first interface processing layer, quick stagnant water repair mortar layer, second epoxy sealant layer and high strength repair mortar layer for bolt position percolating water problem obtains solving. The invention adopts various materials and various processes to be combined, and the problem of water leakage of the high-speed rail and subway tunnel segments is solved systematically.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of repair of a segment splicing seam according to example 1 of the present invention;
FIG. 2 is a side elevation sectional view of a repair of a segment splicing seam according to example 1 of the present invention;
FIG. 3 is a schematic structural view of repair of segment bolt parts in example 1 of the present invention;
fig. 4 is a schematic structural view of repair of a soil cavity on the outer side of a segment in example 2 of the present invention;
fig. 5 is a schematic structural view of repair of chipped and unfilled corner portions in duct pieces in example 3 of the present invention.
Icon: 1-segment splicing seam; 2-deep grouting holes; 21-hydrophobic polyurethane grouting liquid; 22-a first water stopping needle head; 221-a rubber ring; 222-an aluminum rod; 3-a pipe piece; 4-shallow grouting holes; 41-elastic epoxy grouting liquid; 42-a second water stopping needle head; 5-bolt; 51-a segment substrate; 52-an interfacial treatment agent; 53-rapid water stopping mortar; 54-epoxy sealant; 55-structural repair mortar; 6-soil cavity; 61-cement-water glass double-liquid slurry; 62-epoxy grouting liquid; 7-plum blossom grouting pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.
The following describes a system and a process for repairing leakage water in a tunnel of a high-speed railway or a subway in accordance with an embodiment of the present invention.
Example 1
Referring to fig. 1, fig. 2 and fig. 3, a process for repairing leakage water in a high-speed railway or subway tunnel according to an embodiment of the present invention includes:
judging the current water leakage condition of the high-speed rail and the subway tunnel;
according to the condition of the leakage water, a corresponding repairing method is adopted to repair the leakage water; wherein:
and when the condition of the leakage water is judged to be the water leakage of the segment splicing seam 1, repairing the leakage water by adopting a repairing method of deep water stopping and shallow layer reinforcing.
And when the condition of water leakage is judged to be water inrush from the segment splicing seam 1, repairing the water leakage by adopting a repairing method combining curtain solidification, deep water stopping and shallow water stopping.
And when the condition of the water leakage is judged to be the water leakage at the bolt part of the segment, repairing the water leakage by adopting a structural plugging repairing method.
Referring to fig. 1 and 2, the method for repairing deep water stopping and shallow layer reinforcing comprises the following steps:
s11, obliquely and crossly drilling deep grouting holes 2 on two sides of the segment splicing seam 1 along the segment splicing seam 1, wherein the deep grouting holes 2 are staggered. Preferably, the distance between the deep grouting hole 2 and the segment splicing seam 1 is 180mm. The drilling angle between the deep grouting hole 2 and the duct piece 3 is 45 degrees, and the aperture is 14mm. The drilling depth is 20mm from the segment splicing seam 1 to the segment 3 on the other side. The thickness of the duct piece 3 is 350-360 mm, the drilling angle is 45 degrees, and the distance between the deep grouting holes 2 and the duct piece splicing seam 1 is 180mm, so that the drilled deep grouting holes 2 can reach the rear end of the duct piece 3. Through such setting, guarantee that two adjacent deep slip casting holes 2 can intersect in section of jurisdiction concatenation seam 1 department after the slip casting, and the drilling degree of depth of deep slip casting hole 2 passes section of jurisdiction concatenation seam 1 until deepening 20mm department of opposite side section of jurisdiction 3 for hydrophobic polyurethane grout 21 can pour into the rear end of section of jurisdiction 3 and carry out deep stagnant water. The distance between two adjacent deep grouting holes 2 on the same side is 250mm. In order to ensure the integrity of the pipe piece 3, the hole pitch of the two sides of the pipe piece splicing seam 1 is not too close.
S12, cleaning the slice splicing seams 1 and the deep grouting holes 2. For example, the water gun is adopted to clean the segment splicing seam 1 and the deep grouting hole 2, so that no attachment is left in the segment splicing seam 1 and the deep grouting hole 2, and the quality of subsequent grouting is ensured.
And S13, installing a first water stopping needle head 22 in the deep grouting hole 2. Preferably, the first water-stopping needle 22 has a diameter of 13mm and a length of 100mm. When the device is installed, the rubber ring 221 at the front end of the first water-stopping needle head 22 is completely embedded into the deep grouting hole 2 and screwed by a special inner hexagonal wrench, the aluminum rod 222 of the first water-stopping needle head 22 presses the gasket to expand the rubber ring 221, so that the first water-stopping needle head 22 is fixed in the deep grouting hole 2, and after the device is installed, no gap exists between the first water-stopping needle head 22 and the deep grouting hole 2, and water does not leak. The water-stopping needle head is widely applied to waterproof engineering, in particular to the pouring of chemical grout such as concrete pouring polyurethane grout, epoxy grout and the like. Through the continuous pressure generated by the grouting machine, chemical feed liquid is poured into the gap inside the concrete, and water in the gap is completely squeezed away, so that the segment splicing seam 1 is completely filled, and the purpose of water stopping is achieved. The water-stopping needle is commercially available, such as kyazine building materials ltd, guangzhou, and the like.
And S14, grouting the deep grouting holes 2 by using the hydrophobic polyurethane grouting liquid 21 until all the deep grouting holes 2 are completely grouted. In the grouting process, a low-pressure grouting method is adopted, the grouting pressure is not more than 0.4MPa, and the thickness of the hydrophobic polyurethane grouting liquid 21 is not more than 1/3 of the thickness of the pipe piece 3. Therefore, the amount of the hydrophobic polyurethane grouting liquid 21 required by deep water stop is achieved, the waste of the hydrophobic polyurethane grouting liquid 21 is avoided, and the intersection at the segment splicing joint 1 after the two adjacent deep grouting holes 2 perform grouting can be ensured. When the deep grouting hole 2 is not leaked, grouting from another deep grouting hole 2, and sequentially performing. And (4) observing whether leakage exists after all grouting is finished, and if leakage exists, supplementing grouting from a deep grouting hole 2 closest to the deep grouting hole 2 until the deep grouting hole 2 does not leak. The polyurethane chemical grouting material is a high-molecular grouting leakage-stopping material chemically synthesized by polycyanate and polyhydroxy polyether, and the grout can be automatically dispersed, emulsified and foamed after meeting water, and immediately undergoes chemical reaction to form a watertight consolidation body. The hydrophobic polyurethane grouting liquid is a single component, does not need metering and mixing, has large foaming rate and no shrinkage after curing, and has good hydrophobic property, high chemical stability, high strength and good toughness. The hydrophobic polyurethane grouting liquid 21 has larger penetration radius and solidification volume ratio, and generates chemical reaction when meeting water to release carbon dioxide, and the pressure generated by gas pushes the grouting liquid to diffuse to the deep part of a crack to form a tough solidified body. The hydrophobic polyurethane grouting liquid 21 may be commercially available, and for example, a hydrophobic polyurethane grouting liquid manufactured by waterproof doctor corporation may be used.
S15, obliquely and crossly drilling shallow grouting holes 4 on two sides of the segment splicing seam 1 along the direction of the segment splicing seam 1, wherein the shallow grouting holes 4 are arranged in a staggered mode. Preferably, the distance between the shallow grouting hole 4 and the segment splicing seam 1 is 50mm, the drilling angle between the shallow grouting hole 4 and the segment 3 is 45 degrees, the aperture is 14mm, and the drilling depth is 20mm from the segment splicing seam 1 to the segment 3 on the other side. Through such setting, guaranteed that two adjacent shallow layer slip casting holes 4 can intersect at section of jurisdiction concatenation seam 1 department after the slip casting thick liquid, realize the close grout of shallow layer elasticity epoxy and consolidate. The distance between the deep grouting holes 2 and the shallow grouting holes 4 adjacent to each other on the same side is 125mm. In order to ensure the integrity of the pipe piece 3, the hole pitch at the two sides of the pipe piece splicing seam 1 is not too dense.
S16, cleaning the slice splicing seams 1 and the shallow grouting holes 4. For example, the water gun is adopted to clean the segment splicing seam 1 and the shallow grouting hole 4, so that the segment splicing seam 1 and the shallow grouting hole 4 are clean and free of attachments, and the subsequent grouting quality is ensured.
S17, sealing the surface of the segment splicing joint 1 by adopting epoxy sealant, and preventing the elastic epoxy grouting liquid 41 from flowing out during subsequent grouting. The epoxy sealant is made up by using dry or non-dry viscous material of asphalt, tar, rubber and resin as raw material and adding various compounding agents, and can be deformed with the shape of sealing surface, and is not easy to flow, and has the advantages of strong adhesive force, small shrinkage, good medium-resisting property and good technological property, etc. Preferably, the epoxy sealant comprises a component A and a component B, wherein the component A comprises modified epoxy resin, an assistant and a reinforcing agent, the component B comprises low-viscosity modified polyamine and high-strength polyamide, and the weight ratio of the component A to the component B is 4-5. The epoxy sealant has no solvent, so that the environmental pollution caused by the solvent is greatly avoided, and a cured film of the epoxy sealant has the excellent performances of strong adhesion, high hardness, temperature resistance, water resistance, oil resistance, corrosion resistance and the like. The epoxy sealant can be purchased commercially, and can be produced by Nanjing technology development general company of forest chemical research institute of Chinese Lincoll, for example.
And S18, installing a second water stopping needle head 42 in the shallow grouting hole 4. The diameter of the second water-stopping needle 42 is 13mm, and the length thereof is 80mm. When the device is installed, the rubber ring at the front end of the second water-stopping needle head 42 is completely embedded into the shallow grouting hole 4 and screwed by a special inner hexagonal wrench, and no gap or water leakage is ensured between the second water-stopping needle head 42 and the shallow grouting hole 4 after the device is installed.
And S19, grouting the shallow grouting holes 4 by using the elastic epoxy grouting liquid 41 until all the shallow grouting holes 4 are completely grouted. And a low-pressure grouting method is adopted in the grouting process, the grouting pressure is not more than 0.4MPa, grouting can be stopped when the shallow grouting hole 4 beside the shallow grouting hole 4 which is being grouted bleeds, grouting is carried out from another shallow grouting hole 4, and sequential grouting is carried out. The elastic epoxy grout 41 can be selected from elastic epoxy grout materials developed by Shanghai institute of construction science. The elastic epoxy grouting liquid 41 comprises epoxy resin and a flexible curing agent, and during construction, the epoxy resin and the flexible curing agent are mixed and react to generate a cured material with high strength and certain toughness, so that a leaking stoppage function is realized. The slurry has low viscosity, good filling property and proper operation time of about 110min, thus not only ensuring that the slurry can not be cured instantly in the grouting process, but also ensuring that the slurry is cured within a short period of time after being poured to achieve the effect of repairing and reinforcing, and the cured material of the slurry has high strength, high toughness and good elasticity and excellent cured material durability.
Referring to fig. 3, the method for repairing a structural occlusion comprises the following steps:
s21, removing rust on the rusted bolt 5, cleaning up pollutants on the surface of the bolt 5, and painting anti-rust paint. The rust-proof paint isolates the derusted bolt 5 from the outside air and moisture, and prevents the surface of the bolt 5 from rusting. The rust-preventive paint can be purchased commercially, and for example, the rust-preventive paint produced by Guangdong sanderi chemical Limited can be selected.
And S22, reinforcing the tightened and loosened bolt 5.
S23, the segment base layer 51 is coated with an interface treatment agent 52 to perform an interface treatment on the segment base layer 51 to prevent a void phenomenon. The interface treating agent 52 can firmly bond the base layer, the surface of the base layer can be firmly bonded by a new adhesive, cracking is avoided, plasticity is large, and the interface treating agent is suitable for the surfaces of different base materials and used for improving mutual bonding force. On the other hand, the construction is quick, the labor intensity can be reduced, the cost can be reduced, the permeability is good, the base layer can be fully wetted, the water resistance, the weather resistance, the aging resistance and the like are good, and the thin layer construction is not cracked, is not hollowly formed and is not dropped. The concrete interface treating agent used in this embodiment is commercially available, and for example, a concrete interface treating agent produced by beijing ecotope scientific and technological development ltd may be used.
When in use, the interface treating agent 52 is mixed into a uniform thick paste according to the water-cement ratio of 1. The interface treating agent 52 is fully and uniformly stirred during preparation, and is used after being placed for 5 to 10 minutes. When the interface treatment agent 52 is left to stand, if it is thickened, water can be added to the mixture and the mixture is stirred. The mixed interface treating agent 52 is used up within 1 to 4 hours according to the temperature. The interface treating agent 52 is applied by plastering or spraying. When the adhesive is coated, the interface treating agent 52 is directly coated on the surface of the segment base layer 51 by a plastering tool, the thickness is about 1.5 to 3mm, and the using amount is about 2 to 2.5kg/m 2 The specific situation is determined by the basal plane. And carrying out the next operation after 5 to 20 minutes.
S24, adopting rapid water-stopping mortar 53 to plug the joint of the duct piece 3 and the bolt 5, and ensuring that the joint of the duct piece 3 and the bolt 5 is watertight. Specifically, when plugging, a V-shaped groove is formed at the joint of the duct piece 3 and the bolt 5, and then the V-shaped groove is plugged by using the rapid water-stopping mortar 53. The quick water-stopping mortar 3 can be selected from mortar treasures produced by waterproof doctor company and the like.
And S25, sealing the joint of the pipe piece 3 and the bolt 5 and the joint of the nut and the screw cap by using epoxy sealant 54.
And S26, filling and leveling the bolt part of the pipe piece by adopting structural repair mortar 55.
The bolt part of the segment is derusted, coated with antirust paint, plugged, sealed and filled, so that the plugging effect is achieved, and the bolt 5 is anchored and prevented from corrosion.
Preferably, the structure repair mortar 55 comprises 200-300 parts by weight of sulphoaluminate cement; 200-300 parts of Portland cement; 500-600 parts of quartz sand; 1-2 parts of a defoaming agent; 2-4 parts of cellulose ether; 1-2 parts of a water reducing agent; 16-20 parts of fly ash; 1-2 parts of an early strength agent; 10-20 parts of an acrylate polymer; 100-150 parts of a permeation crystallization master batch; 0.5-1 part of water repellent. The above-mentioned raw material components are commercially available. For example, the sulfoaluminate cement is R.SAC 52.5 grade sulfoaluminate cement, and the defoaming agent is tributyl phosphate. The portland cement is one of PO42.5 portland cement or PO52.5 portland cement. The water reducing agent is a polycarboxylic acid water reducing agent, and the early strength agent is one of anhydrous calcium chloride, anhydrous sodium sulfate, lithium carbonate or sodium carbonate. The acrylate polymer was a BASF S400 acrylate polymer produced by Pasfu, germany. The penetration crystallization material is KMA mortar additive produced by Canada Katon company, which can react with cement-based materials to form hydrated crystals to block the fine pores and cracks of the mortar. The water repellent is produced by Decarbox corporation. The alkalinity and the hydration heat of the system can be reduced by adding the fly ash, so that the microcracks of a hardened body of the composite gelling system are reduced, the durability of the system can be improved, and the fly ash can further improve the strength and the compactness of the repair mortar, improve the wear resistance and reduce the drying shrinkage through the hydration reaction. The structural repair mortar 55 has high strength and high impermeability.
According to the embodiment of the invention, the deep polyurethane water-stop grouting and the shallow elastic epoxy grouting are combined for reinforcement, water stop is firstly carried out on the water leakage part of the segment splicing seam 1, and sealing reinforcement is carried out after water stop, so that the problem of water leakage of the segment splicing seam 1 is effectively solved. For the problem of water leakage at the bolt part of the pipe piece, the problem of water leakage at the bolt part is solved by derusting and screwing the bolt 5, and then carrying out interface treatment, plugging, sealing and filling. The repairing system adopts various materials and various processes, and solves the problem of water leakage of the high-speed rail and the subway tunnel segment.
Example 2
The device obtained through the design can basically solve the problem of water leakage at the segment splicing seams and the segment bolt parts of the high-speed rail and the subway tunnel, but if the water leakage at the segment splicing seams is water burst, the outer sides of the segments need to be repaired firstly, and a designer further perfects the repair system based on the aim of further perfecting the functions of the repair system. For a brief description, the corresponding contents in embodiment 1 can be referred to where this embodiment is not mentioned.
Referring to fig. 2 and 4, when water gushes from the segment splicing seam 1, a method for repairing curtain consolidation, deep water stopping and shallow layer consolidation is adopted. The curtain consolidation comprises the following steps: filling soil into the soil cavity 6 on the outer side of the pipe piece 3, then carrying out double-liquid grouting on the soil cavity 6 through the plum blossom grouting pipe 7 by adopting cement-water glass double-liquid grout 61 formed by cement grout and water glass grout, and finally carrying out perfusion reinforcement on the soil cavity 6 by adopting epoxy grouting liquid 62. The cement-water glass double-liquid slurry 61 is a slurry material formed by injecting cement and water glass as main agents in a double-liquid mode according to a certain proportion and adding an accelerating agent and a retarder if necessary. The double-liquid slurry overcomes the defects of long setting time, difficult control, low concretion rate under the condition of flowing water and the like of single-liquid cement slurry, improves the effect of cement grouting, enlarges the range of cement grouting, is suitable for large water burst of tunnels, mud outburst plugging and splitting consolidation of karst flow plastic granular soil, and can achieve the purpose of quick plugging by adopting the mixed slurry in the stratum with larger flow rate of underground water.
Preferably, the cement slurry and the water glass slurry are prepared into the cement-water glass double-fluid slurry 61 according to the mass ratio of 4. Wherein, water and cement are blended according to the mass ratio of 0.7. The double-fluid slurry of the proportion has good controllability, the gel time can be accurately controlled within a range of several seconds to dozens of minutes, and the calculus rate of the coagulated slurry is high. The above-mentioned raw materials are commercially available. For example, the cement is produced by Shandong gold lake cement Co., ltd, and the water glass is produced by Shandong inheritance chemical Co., ltd.
The epoxy grouting liquid 62 is modified and synthesized by taking high-strength epoxy resin and flexible polyurethane as main agents and matching with various additives and active auxiliaries, has low viscosity, high strength, low surface tension, good permeability and good fluidity, can be well adsorbed, permeated and diffused into micropores of a soil body, is filled fully, forms good bonding with the soil body, and achieves the purpose of reinforcement. The epoxy grouting liquid 62 also has the advantages of good durability, rapid curing, environmental protection and the like. When in use, the high-strength epoxy resin and the flexible polyurethane are uniformly mixed according to the weight ratio of 3. The above-mentioned raw materials are commercially available. For example, epoxy grout 62 from sandisk corporation, beijing, rui, inc.
Fill and the grout consolidation to soil cavity 6 earlier through above-mentioned step to can reduce the water yield in the soil body or get rid of the water in the soil body completely, be convenient for follow-up carry out the percolating water to section of jurisdiction concatenation seam 1 and handle.
If only the water gushing phenomenon occurs in the segment splicing seam 1 and no water leakage exists at the bolt part of the segment, the steps S11 to S19 are sequentially carried out after the water gushing problem outside the segment 3 is solved through the steps. If the water gushing phenomenon occurs at the segment splicing seam 1 and the water leakage phenomenon also occurs at the segment bolt part, the steps S11-S19 and S21-S26 are sequentially carried out after the water gushing problem at the outer side of the segment 3 is solved through the steps.
Example 3
The device obtained through the design can basically solve the problem of water leakage at the splicing seams of the segments of the high-speed rail and the subway tunnel and the bolt parts of the segments, but if the segments break and break corners, the segments still need to be repaired, and a designer further perfects the repair system based on the aim of further perfecting the functions of the segments. For a brief description, the corresponding contents in embodiment 1 can be referred to where this embodiment is not mentioned.
Referring to fig. 5, when the segment 3 has a chipping/chipping, the method further includes the following steps after step S19 or step S26:
and S31, chiseling the concrete at the segment collapse unfilled corner part to be compact. For example, a practical steel chisel and an iron hammer are used, loosened concrete is chiseled manually, a new section is required to be chiseled, and the residual of the loosened concrete block is not allowed.
S32, washing the broken and unfilled corner parts of the tube sheet with clear water.
And S33, hardening the segment base layer at the segment collapse and unfilled corner part by adopting an interface treating agent.
And S34, repairing and maintaining the segment collapse unfilled corner part by adopting structural repair mortar.
S35, repairing the color of the corner lacking part of the tube sheet. The repair should achieve the effects of tight combination of new and old concrete, required strength, consistent color, no crack, no concave-convex on the surface, flatness and smoothness.
Example 4
A high-speed railway and subway tunnel leakage water repairing system takes a soil cavity 6 on the outer side of a segment, a segment splicing seam 1, a segment bolt leakage water part and a segment collapse unfilled corner part as a construction area. The repairing system comprises a segment outside soil cavity repairing system, a segment splicing seam repairing system, a segment bolt part repairing system and a segment chipping and unfilled corner repairing system.
The repair system of the soil cavity outside the duct piece takes the soil cavity 6 outside the duct piece as a construction area, soil is filled in the soil cavity 6, and an epoxy grouting layer and a double-liquid grouting layer are sequentially arranged on one side, close to the duct piece 3, of the soil cavity 6. Preferably, the grouting material of the two-liquid grouting layer is cement-water glass two-liquid grout.
The duct piece splicing seam repairing system comprises a deep water-stopping grouting layer, a shallow reinforcing grouting layer and a first epoxy sealant layer which are sequentially arranged in a duct piece splicing seam 1 from bottom to top. Preferably, the grouting material of the deep water-stop grouting layer is a hydrophobic polyurethane grouting liquid 21. The grouting material of the shallow layer reinforcing grouting layer is elastic epoxy grouting liquid 41.
The repair system for the water leakage part of the segment bolt comprises a first interface treatment layer arranged on a segment base layer 51, a quick water-stopping mortar layer arranged at the connecting part of the segment base layer 51 and the bolt 5, a second epoxy sealing adhesive layer, an antirust layer and a high-strength repair mortar layer. Specifically, a V-shaped groove is formed at the connection part of the segment base layer 51 and the bolt 5, and the V-shaped groove is filled with rapid water-stopping mortar 53. The second epoxy sealing glue layer is arranged on the quick water stop mortar layer and at the joint of the nut and the screw cap, the antirust layer is arranged on the surface of the bolt 5, and the high-strength repair mortar layer is flush with the surface of the pipe piece 3.
The duct piece chipping and unfilled corner repairing system comprises a second interface treatment layer and a repair mortar layer which are sequentially arranged at a duct piece chipping and unfilled corner part from bottom to top.
The both sides of section of jurisdiction concatenation seam 1 slant alternately are equipped with a plurality of deep injected hole 2 respectively, and the setting of staggering between deep injected hole 2, this deep injected hole 2 along section of jurisdiction concatenation seam 1 the direction until deepening the section of jurisdiction 3 of this section of jurisdiction concatenation seam 1 opposite side.
Preferably, the distance between the deep grouting holes 2 and the segment splicing seams 1 is 180mm, the drilling angle between the deep grouting holes 2 and the segment 3 is 45 degrees, the aperture is 14mm, the drilling depth is 20mm from the segment splicing seams 1 to the segment 3 on the other side, and the distance between two adjacent deep grouting holes 2 on the same side is 250mm.
The both sides of section of jurisdiction concatenation seam 1 still the slant alternately are equipped with a plurality of shallow grouting holes 4 respectively, and the setting of staggering between shallow grouting holes 4, and this shallow grouting holes 4 is until deepening the section of jurisdiction 3 of this section of jurisdiction concatenation seam 1 opposite side along the direction of section of jurisdiction concatenation seam 1.
Preferably, the distance between shallow slip casting hole and the section of jurisdiction concatenation seam 1 is 50mm, and the drilling angle between this shallow slip casting hole 4 and the section of jurisdiction 3 is 45, and the aperture is 14mm, and the drilling depth is for passing section of jurisdiction concatenation seam 1 to the 20mm department of opposite side section of jurisdiction 3, and the distance between the adjacent deep slip casting hole 2 of homonymy and shallow slip casting hole 4 is 125mm.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (9)
1. A high-speed railway or subway tunnel leakage water repairing process is characterized by comprising the following steps:
judging the current water leakage condition of the high-speed rail and the subway tunnel;
repairing the leakage water by adopting a corresponding repairing method according to the leakage water condition; wherein:
when the water leakage condition is judged to be water leakage of the segment splicing seam, repairing the water leakage by adopting a repairing method of deep water stopping and shallow reinforcing; when the method for repairing the seepage water by adopting the deep water stopping and shallow reinforcing method is adopted for repairing the seepage water, the method comprises the following steps:
s11, obliquely and crossly drilling deep grouting holes on two sides of the duct piece splicing seam along the direction of the duct piece splicing seam, wherein the deep grouting holes are arranged in a staggered manner;
s12, cleaning the segment splicing seams and the deep grouting holes by using a water gun;
s13, mounting a first water stopping needle head in the deep grouting hole;
s14, grouting the deep grouting holes, wherein a grouting material is a hydrophobic polyurethane grouting liquid;
s15, obliquely and crossly drilling shallow grouting holes on two sides of the duct piece splicing seam along the direction of the duct piece splicing seam, wherein the shallow grouting holes are arranged in a staggered manner;
s16, cleaning the segment splicing seams and the shallow grouting holes by using a water gun;
s17, sealing the surface of the segment splicing seam by adopting epoxy sealant;
s18, mounting a second water stopping needle head in the shallow grouting hole;
s19, grouting the shallow grouting hole, wherein the grouting material is elastic epoxy grouting liquid;
when the condition of the leakage water is judged to be the water gushing of the segment splicing seam, repairing the leakage water by adopting a repairing method combining curtain solidification and deep water stopping and shallow layer reinforcement; the curtain consolidation comprises the following steps: filling soil into a soil cavity on the outer side of the pipe piece, then performing double-liquid grouting on the soil cavity through a plum blossom grouting pipe by adopting double-liquid grout formed by cement grout and water glass grout, and finally performing perfusion reinforcement on the soil cavity by adopting epoxy grouting liquid;
and when the water leakage condition is judged to be water leakage at the bolt part of the segment, repairing the water leakage by adopting a structural plugging repairing method.
2. The repair process of leakage water in a high-speed railway or subway tunnel according to claim 1, wherein in step S11, the distance between said deep grouting holes and said segment splicing seam is 150-180 mm, the drilling angle between said deep grouting holes and the tunnel segment is 44-46 °, the bore diameter is 10-15 mm, the drilling depth is 15-25 mm from said segment splicing seam to the segment on the other side, and the distance between two adjacent deep grouting holes on the same side is 250mm; in the step S15, the distance between the shallow grouting hole and the segment splicing seam is 45-55 mm, the drilling angle between the shallow grouting hole and the segment is 44-46 degrees, the hole diameter is 10-15 mm, the drilling depth is 15-25 mm from the segment splicing seam to the segment on the other side, and the distance between the deep grouting hole and the shallow grouting hole adjacent to the same side is 125mm.
3. The repair process of leakage water in a high-speed railway or subway tunnel according to claim 1, wherein in step S13, said first water-stopping needle head has a diameter of 10-13 mm and a length of 100-150 mm, and when it is installed, the rubber ring at the front end of said first water-stopping needle head is completely embedded in said deep grouting hole and screwed with a special allen key; in the step S18, the diameter of the second water stopping needle head is 10-13 mm, the length of the second water stopping needle head is 80-100 mm, and when the second water stopping needle head is installed, the rubber ring at the front end of the second water stopping needle head is completely embedded into the shallow grouting hole and screwed tightly by using a special inner hexagonal wrench.
4. The repair process of leakage water in a high-speed railway or subway tunnel according to claim 1, wherein in step S14, a low-pressure grouting method is adopted in the grouting process, said polyurethane grouting liquid does not exceed 1/3 of the thickness of the segment, when said deep grouting hole does not leak, another deep grouting hole is used for grouting, and the sequential progress is carried out; and observing whether leakage exists after all grouting is finished, and if leakage exists, replenishing grouting from the deep grouting hole closest to the deep grouting hole until the deep grouting hole does not leak.
5. The repair process for leakage water in a high-speed railway or subway tunnel according to claim 1, wherein in step S19, a low-pressure grouting method is used during grouting, and grouting is stopped when a shallow grouting hole adjacent to said shallow grouting hole in grouting is overflowed, and grouting is performed from another shallow grouting hole sequentially.
6. The repair process for leakage water in a high-speed railway or subway tunnel according to claim 1, wherein said cement slurry and said water glass slurry are prepared in a mass ratio of 4.
7. The process for repairing the leakage water in the high-speed railway or subway tunnel according to claim 1, wherein when repairing the leakage water by using the method for repairing the structural plugging, the process comprises the following steps:
s21, removing rust on the rusted bolt and painting anti-rust paint;
s22, reinforcing the screwed and loosened bolt;
s23, coating an interface treating agent on the segment base layer;
s24, forming a V-shaped groove at the joint of the duct piece and the bolt, and then plugging the V-shaped groove by adopting rapid water-stopping mortar;
s25, sealing the joint of the duct piece and the bolt and the joint of the nut and the screw cap by using epoxy sealant;
and S26, filling and leveling the bolt part of the pipe piece by adopting structural repair mortar.
8. The repairing process of the leakage water in the high-speed railway or subway tunnel according to claim 7, wherein when said segment has a broken corner, the following steps are further included after step S19 or step S26:
s31, chiseling the concrete at the segment collapse and unfilled corner part to be compact;
s32, washing the segment collapse unfilled corner part with clear water;
s33, hardening the base layer of the segment corner chipping part by using the interface treating agent;
s34, repairing and maintaining the segment corner collapse and unfilled positions by adopting the structural repair mortar;
and S35, repairing the color of the segment corner collapse and unfilled part.
9. A high-speed railway or subway tunnel percolating water repairing system, characterized in that the repairing process of claim 8 is adopted to form the repairing system, the repairing system takes the segment outside soil cavity, the segment splicing seams, the percolating water parts of the segment bolts and the segment chipping unfilled corner parts as construction areas, and the repairing system comprises a segment outside soil cavity repairing system, a segment splicing seam repairing system, a segment bolt percolating water part repairing system and a segment chipping unfilled corner repairing system;
the repairing system for the soil cavity outside the duct piece takes the soil cavity outside the duct piece as a construction area, soil is filled in the soil cavity, and an epoxy grouting layer and a double-liquid grouting layer are sequentially arranged on one side of the soil cavity, which is close to the duct piece, outwards;
the duct piece splicing seam repairing system comprises a deep water-stopping grouting layer, a shallow reinforcing grouting layer and a first epoxy sealant layer which are sequentially arranged in the duct piece splicing seam from bottom to top;
the repair system for the water leakage positions of the segment bolts comprises a first interface treatment layer arranged on a segment base layer, a quick water-stop mortar layer arranged on the segment base layer and the connection positions of the bolt, a second epoxy sealing adhesive layer, an antirust layer and a high-strength repair mortar layer, wherein the second epoxy sealing adhesive layer is arranged on the quick water-stop mortar layer and at the connection positions of the nut and the screw cap, the antirust layer is arranged on the surface of the bolt, and the high-strength repair mortar layer is flush with the surface of the segment;
the duct piece chipping and unfilled corner repairing system comprises a second interface treatment layer and a repair mortar layer which are sequentially arranged at a duct piece chipping and unfilled corner part from bottom to top.
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| CN112593981B (en) * | 2020-12-10 | 2023-02-14 | 北京市政路桥科技发展有限公司 | Water leakage treatment method for segment splicing seam of shield section |
| CN112682072A (en) * | 2020-12-22 | 2021-04-20 | 湖北省大唐安盛建筑工程有限公司 | Tunnel reinforcing gap treatment process |
| CN112879041A (en) * | 2021-01-23 | 2021-06-01 | 中铁二十三局集团第一工程有限公司 | Construction method for treating diseases of main structure of subway |
| CN112921842A (en) * | 2021-01-27 | 2021-06-08 | 天津市管道工程集团有限公司 | Water-stopping and leaking-stopping construction method for concrete culvert pipe |
| CN113356881B (en) * | 2021-07-15 | 2024-08-30 | 上海地铁维护保障有限公司 | Segment deep grouting method for treating tunnel leakage disease |
| CN113653511B (en) * | 2021-09-01 | 2023-12-29 | 珠海华发城市研究院有限公司 | Shield tunnel joint plugging grouting method |
| CN115467549A (en) * | 2022-09-13 | 2022-12-13 | 中国一冶集团有限公司 | Repairing method for deep foundation pit basement exterior wall curtain combined with shallow grouting |
| CN116398083B (en) * | 2023-04-07 | 2024-08-30 | 山东大学 | Full-plugging grouting method for displacement water isolation, limited-area expansion and localized plugging gushing water |
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| CN102979536A (en) * | 2012-12-11 | 2013-03-20 | 上海市基础工程有限公司 | Construction method for tunnel segment repair and reinforcement |
| CN207111105U (en) * | 2017-08-17 | 2018-03-16 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel ring seam water seepage treatment structure |
| CN208472795U (en) * | 2018-06-30 | 2019-02-05 | 厦门防水博士建筑工程有限公司 | A kind of tunnel and underground pipe gallery percolating water repair system |
| CN110185470A (en) * | 2019-06-19 | 2019-08-30 | 中铁十九局集团第六工程有限公司 | A kind of tunnel cross formula grouting for water blocking hole structure and its construction method |
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