CN111485922B - Method for treating water leakage, block falling and slurry turning of ELF railway tunnel - Google Patents
Method for treating water leakage, block falling and slurry turning of ELF railway tunnel Download PDFInfo
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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
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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
- E21D11/10—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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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- Structural Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
An ELF railway tunnel leaks water, falls the piece and the disease control method of grout turnover, the never solidifying waterproof material is applied to the railway tunnel leaks water and the disease of grout turnover creatively, utilize its ultra-high flexibility, self-healing and cohesiveness to the deformation of basic unit, the extremely strong material advantage of adaptability of cracking, has solved the difficult problem of leaking water of the railway tunnel under the high-frequency vibration disturbance situation; the modified moisture-resistant low-viscosity epoxy grouting material is used in construction joints and irregular cracks, so that the advantages of the material in grouting, plugging and reinforcing the structure are exerted; the improved acrylate grouting material is used for treating water leakage of fine cracks such as irregular cracks, expansion joints and settlement joints of a concrete structure, the characteristics of strong seepage force, capability of ensuring that slurry permeates into the cracks, high elongation, strong deformation resistance, wide temperature adaptation and the like are utilized, the curing speed of the slurry is adjusted according to different water leakage conditions, the requirements of water stopping and water plugging are met, and the repeated waste of materials is reduced.
Description
Technical Field
The device relates to the technical field of railway tunnel disease treatment, in particular to an ELF railway tunnel water leakage, block falling and grout turnover disease treatment method.
Background
The water leakage disease of the railway tunnel seriously affects the safety of railway transportation and restricts the rapid development of the railway transportation. In order to cure various diseases, a railway department consumes a large amount of manpower, material resources and financial resources every year, but the conditioning analysis of the diseases is in a relatively backward status in China, and at present, after tunnel diseases appear, the causes of the diseases can be judged according to experience only by combining the apparent characteristics of the tunnel diseases and the geological, climatic and hydrological information of the areas where the tunnels are located, and corresponding reinforcing schemes and measures are made. For the damaged tunnel, how the bearing capacity is and whether reinforcement is needed do not have a unified standard, and maintenance and repair personnel always deduce the reliability of the damaged tunnel from experience so as to maintain and reinforce the damaged tunnel.
The treatment of the tunnel water leakage diseases lacks of systematic and scientific tunnel disease research theories, methods and processes, and inevitably leads to unscientific material selection and unreasonable disease treatment process methods. The secondary disaster is expanded, the safety accidents are continuously generated, and the serious waste is caused.
At present, a large amount of manpower, material resources and financial resources are required to be invested for solving the leakage of railway tunnel facilities, so that great waste is caused to the country, and the loss of China caused by the structural leakage problem reaches hundreds of billions of yuan every year.
The corrosion protection work of tunnels and infrastructures in China faces important tasks and challenges: firstly, effective protection of large-scale newly-built projects is achieved to ensure the durability and the use safety of the projects; the second is the ongoing repair problem of a large number of projects. The quality of the solution in the two aspects is enough to influence national economy and sustainable development. The corrosion resistance of a concrete structure is improved, the service life of the concrete structure is prolonged, the use safety of concrete engineering is related, the problems of exploitation, processing and consumption of raw materials of concrete are also related, and the sustainable development problem of national economic construction of China is further related.
The railway tunnel grout-turning and mud-pumping is mainly formed and exposed under the action of vehicle load due to water leakage diseases of the tunnel. The influence of the circulating load of the heavy-duty train on the tunnel bottom structure diseases mainly comprises the following steps: the stress distribution of the tunnel bottom structure is unbalanced to generate larger bending tensile stress, so that the substrate is cracked; the long-term action of the train circulating load can accelerate the damage and the expansion of the tunnel bottom structure, and the fatigue damage is inevitably generated gradually; the base surrounding rock is crushed, pulverized and even pulped under the conditions of compression, decompression, vibration and impact, and the stress state of the structure is deteriorated.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for treating water leakage, block falling and grout turnover of an ELF railway tunnel, and aims to solve the problem of railway tunnel damage.
The technical scheme for solving the technical problem is as follows:
an ELF railway tunnel water leakage disease treatment method comprises the following steps:
firstly, cleaning
Removing surface stains and attachments, and blowing the stains and the attachments clean by using a high-pressure special blower until the base layer is exposed;
secondly, drilling grouting holes
Taking the crack as a point, respectively extending two sides by 25-50cm, and crosswise drilling along two sides of the crack, wherein the grouting hole distance is 40cm, the diameter of a drill bit is 10-14mm, the drilling angle is not more than 45 degrees, and the hole depth is 10-30 cm;
thirdly, installing a grouting nozzle
After the grouting hole is checked to meet the standard, the grouting nozzle is installed on the grouting hole to ensure that the grouting nozzle is installed in place and completely sealed;
fourth, grouting
Pouring acrylate and flexible moist epoxy slurry into the interlayer of the grouting nozzle by using a high-pressure grouting machine, controlling the grouting pressure to be 0.2-0.5mpa, and gradually and repeatedly pouring from bottom to top or from one side to the other side in the pouring sequence, maintaining the pressure for 10-30s after grout begins to flow out from the surfaces of adjacent grouting holes or cracks during pouring, and observing the pressure, wherein if the pressure is insufficient, the filling is carried out;
fifthly, slotting and sealing
3.5-5.0cm is opened along the crack to form a V-shaped groove, the crack is taken as a point, the V-shaped groove extends for 15-20cm along the two sides, and the high-permeability epoxy waterproof material is coated on the bottom coat.
An ELF railway tunnel block falling disease treatment method comprises the following steps:
reinforcing of first and second surrounding points
Firstly, taking the edge of a falling block as a central point, extending outwards by about 100cm, arranging grouting pipes in a surrounding point type manner at intervals of 40-60cm, and setting the hole depth to be 10-30 cm; arranging grouting pipes to the central point at the periphery of 40-60cm at intervals of 30-50cm, and controlling the grouting pressure at 0.2-0.5 mpa;
second, defect repair
Cleaning up the damaged lining part and the loose part until a solid foundation structure interface is exposed, dividing a boundary of a part to be chiseled off along a crack, chiseling a U-shaped groove at the boundary, wherein the groove is in the shape of a shovel mouth, and the external mouth of the shovel mouth is small and the internal mouth is large and is 60-70 degrees; drilling a hole in a region with a larger vault and a larger slot width by using an electric hammer, anchoring a 10mm L-shaped twisted steel bar fixing steel wire mesh sheet by using bar planting glue, brushing high-permeability modified epoxy waterproof coating on a concrete base surface, and embedding, filling and repairing by using epoxy mortar in time before curing;
three-in-one seal
And taking the edge of the falling block as a center, expanding the falling block to the periphery for 30cm, polishing and cleaning the falling block, and integrally sealing the cavity and the peripheral expanded part of the falling block by using moist epoxy sealant, wherein the thickness of the falling block is 3-5 mm.
An ELF railway tunnel grout-turning disease treatment method, which is a treatment method aiming at a roadbed penetrating type crack disease, comprises the following steps:
first, dredge and drain
Detecting a water source gathering area in a track grout turning disease area by adopting a radar detector, determining an accurate position, leading water from the position, which is 35cm below a track bed plate, of the bottom of a central drainage channel to the position, which is detected out of the water gathering area by an electric drill, after the accurate position is detected out, drilling a hole with water, wherein the hole diameter is 50mm, the depth is up to the water gathering area, leading water into a drainage tank, and releasing pressure and draining;
secondly, arranging and drilling holes on grouting pipes
Cleaning sundries on the wall outside the drainage channel, drilling holes in a crossed manner along two sides of the crack, cleaning sundries in the drainage channel, and uniformly distributing grouting pipes in the drainage channel;
third, deep layer grouting
Arranging grouting pipes with the depth of 100-120cm and the hole distance of 80cm, and pouring water into the grouting holes by using a high-pressure pouring machine without dispersing grouting materials; controlling the grouting pressure at 0.2-0.6mpa, and adopting compaction type grouting;
four-layer and interlayer grouting
Arranging grouting pipes with the depth of 30-60cm and the hole distance of 40cm, pouring acrylate leaking stoppage grouting materials and wet type modified epoxy grouting materials, controlling the grouting pressure at 0.2-0.5mpa, keeping the pressure for 10-30s after adjacent holes or crack surface observation holes start to discharge slurry, observing the slurry discharge condition and pressure condition in the cracks, performing appropriate filling, and repeatedly performing filling again until the pressure change of the grouting is normal, and stopping the grouting;
fifth, seal
After grouting, the exposed grouting nozzle can be removed by confirming that the plugging resin is completely cured; cleaning the leaked solidified grouting liquid; scraping flexible wet material epoxy sealant along the crack, and after the sealant is solidified, scraping anti-vibration disturbance non-solidified waterproof material along the whole crack, wherein the thickness is 3-5 cm;
sixthly, the ballast bed plate is integrally reinforced and sealed
Grouting pipes are arranged on the track bed plate, the distance between transverse holes is 60cm, the distance between longitudinal holes is 100cm, the hole depth is 30-120cm, an acrylate plugging grouting material and a wet modified epoxy grouting material are poured, the grouting pressure is controlled to be 0.2-0.5mpa, and compact grouting is carried out; both sides of the ballast bed plate are coated and sealed by adopting an anti-vibration disturbance never-solidified waterproof material.
A method for treating an ELF railway tunnel grout turnover disease, which aims at the treatment method of the side surface and the bottom of a drainage channel, comprises the following steps:
first, dredge and drain
Detecting a water source gathering area in a track grout turning disease area by adopting a radar detector, determining an accurate position, leading water from the position, which is 35cm below a track bed plate, of the bottom of a central drainage channel to the position, which is detected out of the water gathering area by an electric drill, after the accurate position is detected out, drilling a hole with water, wherein the hole diameter is 50mm, the depth is up to the water gathering area, leading water into a drainage tank, and releasing pressure and draining;
secondly, cleaning
Cleaning sundries around the bottom, and cleaning a working surface by using high-pressure cleaning equipment;
third, deep layer grouting
Arranging grouting pipes with the depth of 100-120cm and the hole distance of 80cm, and pouring an inorganic composite type water non-dispersible grouting material into the grouting holes by using a high-pressure filling machine; controlling the pressure at 0.2-0.6mpa, and performing compact grouting;
four-layer and interlayer grouting
Arranging grouting pipes with the depth of 30-60cm and the hole distance of 40cm, pouring acrylate plugging grouting materials and wet modified epoxy grouting materials, controlling the grouting pressure to be 0.2-0.5mpa, keeping the pressure for 10-30s after grouting begins to be carried out on adjacent holes or observation holes on the surface of a crack, observing the grouting condition and the pressure condition in the crack, and then carrying out appropriate filling; repeated supplementary grouting is needed, and grouting is stopped until the grouting pressure change is normal;
fifthly, filling the through crack with polyester fiber cotton wool and epoxy sealant
Sixthly, treating the side surface of the drainage channel and the drainage groove
Cleaning a drainage channel and the side surface by using a high-pressure water gun, keeping the drainage channel dry and clean, and blade-coating a high-permeability modified epoxy waterproof material with the thickness of 3.0-3.5mm and the using amount of 25-35kg per meter;
seventhly, after the upper material is solidified, coating a never-solidified waterproof material at the crack, wherein the thickness is 3-5mm, and the using amount per meter is 3.0-5.0kg for secondary sealing;
eighthly, the ballast bed plate is integrally reinforced and sealed
Grouting pipes are arranged on the track bed plate, the distance between transverse holes is 60cm, the distance between longitudinal holes is 100cm, the hole depth is 30-120cm, an acrylate plugging grouting material and a wet modified epoxy grouting material are poured, the grouting pressure is controlled to be 0.2-0.5mpa, and compact grouting is carried out; both sides of the ballast bed plate are coated and sealed by adopting an anti-vibration disturbance never-solidified waterproof material.
Compared with the prior art, the invention has the following beneficial effects: different treatment methods are adopted for different diseases, the effect of reinforcing and reinforcing the tunnel is achieved while the diseases are treated, and the tunnel is prevented from leaking, falling blocks and turning slurry again.
Drawings
FIG. 1 is a schematic diagram of the location of grouting holes when a tunnel crack leaks water in the present invention.
Fig. 2 is a schematic diagram of the positions of grouting holes when a tunnel is broken.
FIG. 3 is a schematic cross-sectional view of a tunnel of the present invention before trench filling.
FIG. 4 is a schematic cross-sectional view of the tunnel of the present invention after the trench is filled.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to fig. 1 to 4.
An ELF railway tunnel water leakage disease treatment method comprises the following steps:
1. technical embodiments
The reason of water leakage of the railway tunnel is integrated, and an organic chemical grouting new material and an inorganic plugging new material are used in a composite way; a new concept of combining leaking stoppage and reinforcement; sorting and selecting the materials by point, line and surface leakage; the construction adopts the combination of blocking, prevention and drainage; the principle of point grouting, elastic-flexible coordination, multiple fortification and comprehensive remediation is researched and popularized in an important way; aiming at various water leakage forms of the railway tunnel, the method can achieve the purposes of correct material selection, scientific leaking stoppage, one-time construction and lifelong benefit.
1.1 cleaning
Firstly, cleaning the surface, removing surface stains and attachments, and then blowing the surface clean by using a high-pressure special blower until the base layer is exposed, so that the condition of cracks can be conveniently checked and analyzed, and a conclusion can be obtained according to analysis, thereby determining the implementation scheme.
1.2 drilling grouting holes
The crack is taken as a point, two sides of the crack extend for 25-50cm respectively, holes are drilled along two sides of the crack in a crossed mode, the grouting hole distance is about 40cm, the diameter of a drill bit is 10-14mm, the drilling angle is not larger than 45 degrees, and the hole depth is 10-30cm (the method is scientifically adjusted according to the structure condition).
1.3 installation of grouting nozzle
After the grouting hole is drilled and the standard is met, a grouting nozzle is installed to ensure that the grouting nozzle is installed in place and completely sealed, acrylate and flexible moist epoxy slurry are poured into the interlayer of the grouting hole (nozzle) by using a high-pressure grouting machine, and the grouting pressure is controlled to be 0.2-0.5 mpa. Repeatedly pouring from bottom to top or from one side to the other side step by step, observing the holes, and keeping the pressure for 10-30s after slurry begins to flow out from the surfaces of adjacent holes or cracks; observing the pressure, and if the pressure is insufficient, properly supplementing the water. The grouting amount of a single grouting pipe is about 3.5kg-5.0kg, and the grouting amount per meter along the crack is about 10kg-25 kg.
1.4 grooving, sealing
3.0-5.0cm is opened along the crack to form a V-shaped groove, the crack is taken as a point, the two sides extend for 15-20cm, and the high-permeability epoxy waterproof material is coated on the bottom coat, so that the material penetrates into the base layer to play the roles of reinforcing, compacting, transiting and firmly bonding with the next layer. The flexible material extends along with the displacement of the crack so as to be beneficial to embedding and filling polyester fiber cotton wool and epoxy sealing clay and ensure the waterproof and leakage-stopping performance during the displacement.
2. Principal material applications and characteristics
2.1 improved acrylate grouting Material
In the water conservancy and hydropower engineering, the mine engineering, the geological exploration engineering and the tunnel cavern engineering of China, the grouting method is often used for water-proof leakage stoppage. The common cement grout can only block large cracks and cannot act on micro cracks, so that the problem of micro crack grouting is not thoroughly solved. Application research of acrylate grouting materials is expected to promote the solution of the problem.
The acrylate grouting material is a water-soluble grouting material taking acrylate as a main component, an elastic gel is formed after solidification, the permeability of the material is extremely strong, the material is mainly applied to treatment of water leakage of fine cracks such as irregular cracks, expansion joints, settlement joints and the like of a concrete structure, and the application of the material in water leakage diseases of railway tunnels is mainly researched.
The acrylate material has the following characteristics:
compared with polypropylene cement, the acrylate grouting material has the advantages of no toxicity, outstanding environmental protection performance, and more favorable durability, dry shrinkage resistance and swellability compared with polyurethane grouting material.
The acrylate grouting material has low viscosity, good grouting performance and strong permeability, and can ensure that the grout can permeate into a gap with the width of 0.1 mm.
The curing speed of the acrylate grouting material is adjustable, and the curing speed can be adjusted within 30s-25min according to different water leakage conditions so as to meet the water plugging requirement and reduce material waste.
The ELF improved acrylate leakage-stopping grouting material meets the requirements of related acrylate slurry physical properties and cured material physical property indexes in JC/T2037-2010 acrylate grouting material industry standard.
| Serial number | Item | Technical requirement (I) | Test results |
| 1 | Appearance of the product | Homogeneous liquid free of particles | Homogeneous particle-free liquid |
| 2 | Density a (g/cm thin Town) | Control value of production plant. + -. 0.05 | 1.092 |
| 3 | viscosity/mPas | ≤10 | 7 |
| 4 | pH value | 6.0～9.0 | 8 |
| 5 | Gel time/s | Reported measured value | 58 |
| 6 | Compressive strength kPa of sand solidification body | ≥200 | 224 |
| 7 | Extrusion damage resistance | ≥300 | 300 |
| 8 | Water-swelling rate/%) | ≥30 | 126 |
TABLE 1 physical Properties of acrylate grouts
The acrylate slurry is an aqueous solution composed of small molecular monomers, the viscosity of the acrylate slurry is only 2-10 mPa.s, and almost no cohesive force exists, which is the reason that the acrylate has stronger permeability than polyurethane and the cohesive strength is higher than the cohesive force of the acrylate. The acrylate has excellent permeability, the surface tension of the acrylate is far less than that of water, the acrylate can be well spread on the interface of concrete, and the acrylate permeates into the concrete along the leakage channel under pressure to effectively block the leakage channel, so that the acrylate accords with a filling mechanism. The acrylate gel is capable of expanding 200% in a flooded environment, again following the dilatant mechanism.
The acrylate can still be firmly adhered to the surface of concrete in a dry-wet cycle environment and cannot be separated from the surface of a concrete crack due to dehydration shrinkage, because the adhesion of the acrylate gel to the surface of the concrete crack is far greater than the cohesive force of the acrylate gel, the underground water level rises, the acrylate gel expands again under the soaking of water, and the dual functions ensure that the crack still cannot leak after the drying shrinkage cycle and have a long-term water plugging effect.
The test results show that: the water-swelling and drying out of the acrylate grout gel is a reversible process. The dried gel expands upon contact with water and weighs much more than the gel at the start of the test.
2.2 Flexible moisture-type modified epoxy grouting material
The A, B two-component commercial grouting material is formed by adding curing agent, diluent, toughening agent and the like into epoxy resin serving as a main agent. The component A is a system mainly comprising epoxy resin, and the component B is a curing agent system.
The adhesive force and cohesive force of the epoxy resin grouting material are both greater than the cohesive force of concrete, and the epoxy resin grouting material plays a good role in recovering or improving the integrity and bearing capacity of a concrete structure. The flexible moist type modified epoxy resin grouting material has the advantages of low initial mixing viscosity, good grouting property, strong permeability, high consolidation strength, strong cohesive force, no shrinkage after consolidation, good chemical stability, good impermeability and good elasticity, can be constructed under the condition of dynamic load and has the excellent characteristics of high-efficiency water plugging material, can play a role in reinforcing a concrete structure and can effectively plug seepage water after cracks are fully grouted; the material can be constructed under the conditions of moist or water-bearing environment and can also be constructed under the condition of no water environment.
The ELF flexible wet type modified epoxy grouting material meets the requirements of related epoxy slurry physical performance indexes in the industrial standard GB50728-2011 engineering structure reinforcing material safety identification technical Specification.
TABLE 2 physical Properties of Flexible moist type modified epoxy grouting Material
2.3 Flexible moisture type modified epoxy structural sealant
The flexible wet epoxy structure sealant is a high-elasticity material consisting of modified epoxy, reactive rubber, a modified curing agent, an auxiliary agent and the like, has stronger bonding capability, and is suitable for bonding materials such as concrete, asphalt, steel, rock and the like; the ageing resistance and the acid and alkali resistance are excellent; the elastic adhesive has good elasticity, and can not crack and fail to bond due to environmental temperature change, vehicle rolling impact, high-frequency train vibration and the like; the method is suitable for repairing and sealing bonding of large-stress cracking and deformation of concrete bodies of high-speed rails, subway tunnels, bridges and infrastructures.
The material is mainly characterized in that:
1. the material has ultrahigh and super-strong elasticity, the elongation rate can reach 80% at 25 ℃, and the material can well follow deformation in high-stress and high-vibration occasions;
2. the adhesive has better adhesive strength, and can reach more than 2MPa with dry concrete;
3. the adhesive can be constructed on a wet interface and also has better adhesive strength;
4. has good glue mixing operability, and does not generate sagging when being coated on the inner side and the upper side of the concrete.
The material is suitable for the engineering of repairing the large stress cracking and deformation of concrete bodies of high-speed rails, subways, highway tunnels, bridges and infrastructures, sealing and bonding between segments of the subway tunnels, sealing and bonding between joints and the like.
TABLE 3 physical Properties of Flexible moisture-type modified epoxy structural sealant
3. Technical advantages
In the treatment of the leakage water disease of the railway tunnel, the defects and the defects of the application of the traditional plugging technology are overcome by adopting the interlayer grouting and composite sealing technology, and the method has the characteristics of large range, multiple points, multiple surfaces, multi-level saturated grouting, long-term seepage prevention, deformation adaptation, quick construction and the like. On the premise of not influencing the normal operation of rail transit, professional equipment (grouting equipment and construction trolleys) developed by the company can fully utilize the rail transit outage time to carry out rapid construction, thereby ensuring the safe repair of a tunnel structure, highlighting the advantages of the technology and generating greater social and economic benefits after popularization and application.
An ELF railway tunnel block falling disease treatment method comprises the following steps:
1. technical embodiments
The main process is that the edge of the falling block is taken as the central point, the falling block is expanded outwards by about 100cm, the surrounding point is filled with high-permeability epoxy reinforcing material, an anchor rod and a reinforcing steel bar are arranged, flexible wet type epoxy repair mortar is filled, and epoxy sealant is scraped for sealing. Not only can repair defects and stop leakage and water, but also can reinforce and reinforce the whole structure;
1.1 reinforcing the surrounding points
The method is generally completed in two steps, wherein in the first step, the edge of a falling block is taken as a central point, the outward expansion is about 100cm, grouting pipes are arranged in a surrounding point mode, the interval is 40cm-60cm, and the hole depth is 10cm-30cm (scientifically adjusted according to the actual condition of the structure). And secondly, arranging grouting pipes to the central point at the position of 40-60cm of the periphery at intervals of 30-50cm, and controlling the grouting pressure to be 0.2-0.5 mpa. Using high-permeability epoxy reinforced grouting material to perform circumferential grouting, performing interlayer grouting reinforcement, performing quantitative constant-pressure grouting, wherein the grouting amount of a single grouting pipe is 2.5kg-3.5 kg. After the material is solidified, the tensile strength of the material and a base layer can reach 26mpa, the tensile shear strength can reach 15mpa, and the overall strength of the peripheral concrete after the material is solidified can reach C40 when the material is injected into a fine crack.
1.2 Defect repair
And shoveling and cleaning the damaged lining part and the loose part until a solid foundation structure interface is exposed. Dividing the boundary of the part to be chiseled along the crack, chiseling a U-shaped groove at the boundary, wherein the groove is in the shape of a shovel mouth, and as shown in figure 3, the outer mouth of the shovel mouth is required to be small and the inner mouth is required to be large, and the angle is 60-70 degrees. The large surface of the forming groove is smooth, so that better combination of bar planting, net hanging and embedded epoxy mortar with the original concrete is facilitated. Drilling the arch crown and the area with larger slot width by using an electric hammer, and anchoring the L-shaped threaded steel bar with the steel bar planting glue into the steel wire mesh sheet with the thickness of 10 mm. The high-permeability modified epoxy waterproof coating is coated on the concrete base surface of the concrete, so that the bonding performance of concrete and materials is facilitated, and epoxy mortar is adopted for embedding, filling and repairing in time before curing.
1.3 integral seal
And taking the edge of the falling block as a center, expanding the falling block to the periphery for 30cm, polishing and cleaning the falling block, and integrally sealing the cavity and the peripheral expanded part of the falling block by using moist epoxy sealant, wherein the thickness of the falling block is 3-5 mm.
2. Principal material applications and characteristics
2.1 high permeability epoxy reinforced grouting material
The adhesive force and cohesive force of the epoxy resin grouting material are both greater than the cohesive force of concrete, and the epoxy resin grouting material has no substitution effect on other materials for recovering or improving the integrity and bearing capacity of a concrete structure. The material has high strength, strong toughness and chemical corrosion resistance of a solidified body, can effectively block water leakage, has higher compressive strength and tensile strength, and ensures the reinforcement and the reinforcement of the defect parts of concrete such as cracks, honeycombs and the like.
TABLE 4 physical Properties of high-permeability epoxy resin reinforced grouting Material
2.2 high-permeability modified epoxy waterproof coating
The high-permeability modified epoxy waterproof coating is a product which is developed by taking epoxy resin as a base material and comprises A, B two components, has good permeability, can permeate into concrete cracks smaller than 0.1mm, has excellent bonding mechanical property, completely reaches and exceeds the national standard, does not contain volatile solvents, has small curing shrinkage, and has excellent ageing resistance and acid and alkali resistance.
The high-permeability modified epoxy waterproof coating is mainly characterized by high solid content, low viscosity, strong permeability and wettability, low initial mixing viscosity of below 150mpa.s, capability of penetrating into concrete fine cracks, adjustable curing speed, capability of curing at the temperature of above 0 ℃, better comprehensive mechanical property, colloid elongation of 15-18 percent and capability of resisting creep deformation and vibration to a certain degree.
| Serial number | Item | Standard requirements (I type) | Test results |
| 1 | Gel time/s | ≤45 | 30 |
| 2 | Surface dry time/s | ≤120 | 60 |
| 3 | Tensile strength/MPa | ≥10.0 | 14.5 |
| 4 | Elongation at break/% | ≥300 | 372 |
| 5 | Tear Strength/(N/mm) | ≥40 | 44 |
| 6 | Low temperature bendability | ≤-35℃ | No crack at-35 ℃ |
| 7 | Water impermeability | 0.4MPa, 2h is impermeable | 0.4MPa, 2h is impermeable |
TABLE 5 physical Properties of high-permeability modified epoxy waterproof coating
2.3 Flexible moist modified epoxy repair mortar
The epoxy resin mortar is a multi-item composite material which is mainly formed by mixing quartz sand, cement and other fillers with epoxy resin and a curing agent as cementing materials and optionally mixing a diluent, a toughening agent and other auxiliaries, has the excellent performances of easy forming before curing, high strength, high bonding force, water resistance and the like after curing, and is suitable for the construction of repairing, reinforcing, anchoring and the like of a concrete structure. When the epoxy resin mortar is used for repairing and renovating projects, in order to enhance the bonding force between the epoxy resin mortar and the original concrete base surface, the epoxy resin interface adhesive is firstly coated on the concrete base surface, and the epoxy resin mortar is applied in time for repairing before curing.
TABLE 6 physical Properties of Flexible moisture-type modified epoxy repair mortar
3. Tunnel renovation effect
Sampling epoxy mortar in the construction process to prepare a mechanical and anti-permeability test piece, detecting the compression strength and tensile strength performance indexes according to the technical specification of DL/T5193-2004 epoxy resin mortar and the construction quality acceptance standard of GB50550-2010 building structure reinforcement engineering, and obtaining the 1d strength value and the 28d strength value of the epoxy resin mortar test piece of 38.4MPa and 68.6MPa through detection and data statistics. The tensile strength 1d is 1.71MPa, and the 28d is 3.17 MPa.
The mortar impermeability test is carried out according to the test method standard of GB/T50082-2009 ordinary concrete long-term performance and durability, and the impermeability grade is greater than P10. Through detection, all indexes of mechanical and anti-permeability performance meet the design and construction requirements.
After the repair of the block falling area of the tunnel is finished, the repaired part is checked on site for many times, the repaired part is not cracked, loosened, peeled and seeped, the repair material is closely bonded with the original lining structure, the waterproof layer structure is complete and compact, and the expected test verification requirements are met.
4. Technical advantages
In the tunnel drop block repairing and renovating project, the process method of taking the edge of the drop block as the central point, completing distribution, complementing each other, giving consideration to both inside and outside and providing multiple fortifications is adopted, the construction method of epoxy grouting and epoxy resin mortar are adopted, the structure reinforcing effect of the epoxy grouting plugging material is exerted, the rapid anti-permeability material is matched to provide a dry environment for groove embedding, the structural repairing is completed by utilizing the properties of high strength, strong binding power and excellent waterproof performance of the epoxy resin mortar, and the problems of blockage, poor anti-permeability plugging effect, poor binding power between the repairing material and the original structure and the like in the conventional method are effectively solved. The method is proved by engineering practice to have easy construction and quality control, and meet the expected test verification requirements.
An ELF railway tunnel grout-turning disease treatment method comprises the following steps:
1. technical embodiments
The main reason for the occurrence of the mud pumping disease of the railway tunnel ballast bed is the water damage at the bottom of the ballast bed. Therefore, it is necessary to prevent rejection and binding and to make sense of force. Punching holes in the central drainage channel to release pressure and drain water, and draining the water into the drainage groove to be naturally drained. After the drainage channel is dredged and drained without pressure, the construction process combining circulating deep grouting and interlayer grouting can be carried out on the diseased region by utilizing a skylight point. Inorganic grouting materials are not dispersed in water, large water flow parts are subjected to grouting and plugging by using high-pressure and high-output grouting equipment, and after water flow is plugged, the whole bottom of the roadbed slab is compacted and grouted and reinforced by using flexible wet modified epoxy grouting materials. And finally, the high-strength, high-bonding-force, anti-vibration disturbance and load disturbance are used, and the material with excellent waterproofness under the extremely cold air temperature condition is adapted to be used for waterproof sealing of the whole bottom of the track bed.
The engineering quality is fundamentally ensured by scientific comprehensive treatment modes such as scientific evaluation of leakage parts and leakage forms, composite use of various materials, reasonable equipment selection, multiple fortifications and the like.
1.1 Dredging and draining
The method comprises the steps of detecting a water source gathering area in a track grout-turning disease area by using a radar detector, determining an accurate position, conducting water diversion at the position of the bottom of a central drainage channel, wherein the position of the water gathering area is about 35cm below a track bed plate through an electric drill, drilling a hole with the diameter of 50mm after the position is detected, leading water into a drainage groove when the depth reaches the water gathering area, and discharging water in a pressure-relief mode.
1.2 ballast bed through type crack disease treatment
1) Through type crack grouting pipe laying drill hole
The wall sundries outside the drainage channel are cleaned to be beneficial to observing and analyzing the crack condition, then, the holes are drilled along the two sides of the crack in a crossed mode, the sundries in the drainage channel are cleaned simultaneously, and grouting pipes are uniformly distributed in the drainage channel (according to the structure scientific layout).
2) Deep grouting: and arranging grouting pipes with the depth of 100-120cm and the hole distance of 80cm, and using a high-pressure filling machine to fill water into the grouting holes (nozzles) without dispersing grouting materials. Controlling the pressure at 0.2-0.6mpa, and performing compact grouting.
3) Interlayer grouting: arranging grouting pipes with the depth of 30-60cm and the hole distance of 40cm, pouring acrylate plugging grouting materials and wet modified epoxy grouting materials, controlling the grouting pressure to be 0.2-0.5mpa, keeping the pressure for 10-30s after grouting begins in observation holes on the surfaces of adjacent holes or cracks, observing the grouting condition and the pressure condition in the cracks, and then performing appropriate filling. And (4) repeatedly replenishing grouting for many times, and stopping grouting until the grouting pressure change is normal.
4) Sealing: after grouting, the exposed grouting nozzle can be removed by confirming that the plugging resin is completely cured. And cleaning the spilled solidified grouting liquid. And (3) scraping flexible moist material epoxy sealant along the crack, and after the sealant is solidified, scraping the whole crack along with an anti-vibration disturbance never-solidified waterproof material with the thickness of 3-5 cm.
1.3 treatment of side surface and bottom of drainage channel
1) Cleaning: cleaning sundries around the bottom, and cleaning a working surface by using high-pressure cleaning equipment;
2) deep grouting: arranging grouting pipes with the depth of 100-; controlling the pressure at 0.2-0.6mpa, and performing compact grouting;
3) interlayer grouting: arranging grouting pipes with the depth of 30-60cm and the hole distance of 40cm, pouring acrylate plugging grouting materials and wet modified epoxy grouting materials, controlling the grouting pressure to be 0.2-0.5mpa, keeping the pressure for 10-30s after grouting begins to be carried out on adjacent holes or observation holes on the surface of a crack, observing the grouting condition and the pressure condition in the crack, and then carrying out appropriate filling; repeated supplementary grouting is needed, and grouting is stopped until the grouting pressure change is normal;
4) filling the through crack with polyester fiber cotton wool and epoxy sealant;
5) and (3) treating the side surface of the drainage channel and the drainage groove: cleaning a drainage channel and the side surface by using a high-pressure water gun, keeping the drainage channel dry and clean, and blade-coating a high-permeability modified epoxy waterproof material with the thickness of 3.0-3.5mm and the using amount of 25-35kg per meter;
6) after the upper material is solidified, coating an uncured waterproof material at the crack, wherein the thickness is 3-5mm, and the using amount per meter is 3.0-5.0kg for secondary sealing.
1.4 ballast bed plate integral reinforcement seal
1) Grouting pipes are arranged on the track bed plate, the distance between transverse holes is 60cm, the distance between longitudinal holes is 100cm, the hole depth is 30-120cm, an acrylate plugging grouting material and a wet modified epoxy grouting material are poured, the grouting pressure is controlled to be 0.2-0.5mpa, and compact grouting is carried out.
2) The two sides of the road bed plate are coated and sealed by adopting an anti-vibration disturbance never-solidified waterproof material, the solid content of the material can reach 99%, the bonding property is excellent, the cohesive failure is 100%, the self-healing property is strong, the flexibility is good, the adaptability to deformation and cracking of the base layer is strong, and the material is suitable for the base layer with large fluctuation and large stress and the parts which can be predicted to occur and are frequently deformed.
2. Principal material applications and characteristics
2.1 inorganic composite grouting material without dispersion in water
The non-dispersed grouting material in water is a powdery grouting material compounded by water-soluble high molecular polymer, surface active substances and the like, has strong dispersibility resistance and good fluidity, realizes self-leveling and self-compaction of underwater concrete, inhibits the dispersion of cement and aggregate during underwater construction, and does not pollute the construction water area.
The non-dispersed grouting material in water is suitable for various concrete projects of underwater pouring, and can be used for projects such as open caisson sealing, tunnel ballast bed base, cofferdam, caisson, riprap grouting, underwater continuous wall pouring, leveling and filling of underwater foundation and the like, large-caliber cast-in-place pile, wharf, dam and reservoir repair. The water outlet is provided with a water impact resistant reinforcing bottom plate, an underwater bearing platform, a sea wall bank protection, a slope protection, pile sealing and leakage stopping, and is used for underwater engineering in which common concrete is difficult to construct.
The action idea of not dispersing cement slurry in water is as follows: firstly, cement mortar is not dispersed in water and is conveyed into an underwater cavity, because the mortar has water-resistant dispersibility, flushed gel materials can be reduced in the water entering process, then the mortar can be stabilized in water through the self weight after sinking into the water bottom, a large-area cavity is filled, and the mortar can automatically flow and permeate into a tiny karst channel through the high fluidity. When the cement mortar is not dispersed in the water and most cavities are completely filled, the second step can be carried out, and the cement paste which is not dispersed in the water is poured into the gaps of the mortar accumulated under the water and the smaller cracks and fissures, so that the whole cavities are effectively filled.
The material is very suitable for grouting the basement of the bed slab of the tunnel road and repairing the defects, and the underground cavity is filled by utilizing the high fluidity, the high durability and the water-resistant dispersibility of the material, and particularly, the plugging effect of the underwater cavity with the complicated internal structure of the basement and the development of a karst channel is obvious.
2.2 shock-resistant disturbance never-cured waterproof material
The material is a novel waterproof material which takes rubber powder, asphalt and special additives as main raw materials, double links contained in polymer rubber and asphalt are cut off through a special process, molecules of cut polymers and asphalt are kept in balance to form intermolecular chemical bonding, the performance of the material is exerted to the maximum degree, and the material can keep a viscous paste body for a long time in an application state and has creep property. The never-cured waterproof material has a self-sealing function, can be applied to grouting leakage stoppage engineering, can quickly stop water and stop leakage, can be used for structural sealing, can automatically flow and fill damaged parts or cracking gaps to block erosion and damage of leakage water, has strong adaptability to deformation and cracking of a base layer, has a good self-healing effect, has excellent low-temperature resistance, and can be constructed in a low-temperature state. Its main characteristics and advantages are as follows:
1) the adhesive force is strong: the coating is constructed on a wet base surface and can be bonded with the inner wall of any crack;
2) ultrahigh solid content: the content of the condensate is more than 99 percent, the condensate does not shrink and almost has no volatile matter;
3) the low temperature resistance is good, and the construction can be carried out at the temperature of below 20 ℃ below zero;
4) never curing: the original colloid state is always kept after construction, the performance is stable, and the aging phenomenon is avoided;
5) the creep property is extremely strong: the crack is filled again by creeping along with the change fluctuation of the structural crack;
6) the self-healing performance is strong: durable, corrosion-resistant, high-low temperature resistant, nontoxic, tasteless, pollution-free, non-combustible and fire-resistant, and the service life of the paint is more than 50 years.
TABLE 7 physical and mechanical properties of never-solidified material resistant to vibration and disturbance
3. Technical advantages
In the grout turnover disease treatment process, firstly dredging, draining and relieving pressure, and then carrying out deep layer and interlayer grouting and segmented grouting on the disease part at the bottom of the drainage tank, thereby avoiding the defect that one-time grouting is difficult to meet the water stop requirement due to larger thickness of a base structure. Therefore, the positions of the pinholes can be scientifically and reasonably arranged according to the situation of the field structural crack, and three-dimensional grouting is performed, so that the grouting is ensured to be in place, and the integral bonding performance and the strength are good.
And after grouting and reinforcing the damaged part at the bottom of the drainage channel, finally, grouting, reinforcing and sealing the whole deep layer and interlayer of the track bed plate by compaction. The non-dispersed grouting material in water is matched with the flexible wet type modified epoxy grouting material for composite grouting, the hole spacing is uniformly distributed at intervals of about 1m, the hole depth is 30-120cm, the grouting pressure is 0.5-1.5 mpa, and the single-hole grouting amount is 20-50 kg.
And (3) performing composite grouting on the through crack and the water non-dispersible grouting material matched with the never-cured waterproof grouting material, and after grouting is finished, brushing and sealing by using a high-permeability modified epoxy waterproof coating, wherein the tensile strength of the material can reach 14.5mpa, the shear strength can reach 44mpa after curing, and no crack exists at the temperature of-30 ℃.
After the material is cured, the epoxy structural sealant is matched with the anti-vibration disturbance never-cured waterproof material for secondary blade coating and sealing, wherein the anti-vibration disturbance never-cured waterproof material has the solid content of 99 percent, excellent bonding performance, strong self-healing property and flexibility, strong adaptability to deformation and cracking of the base layer, and is particularly suitable for the base layer with larger fluctuation and larger stress of the railway tunnel base layer and the parts which can be predicted to generate deformation and can generate deformation regularly.
In a novel material (ELF) composite seepage-proofing, leakage-stopping and reinforcing system for treating the water leakage, block falling and grout turnover of the railway tunnel, a never-cured waterproof material is creatively applied to the water leakage and grout turnover of the railway tunnel, and the problem of water leakage of the railway tunnel under the condition of high-frequency vibration disturbance is solved by utilizing the advantages of the material with extremely high flexibility, self-healing property and bonding property, namely extremely strong adaptability to deformation and cracking of a base layer; the modified moisture-resistant low-viscosity epoxy grouting material is used in construction joints and irregular cracks, so that the advantages of the material in grouting, plugging and reinforcing the structure are exerted; the improved acrylate grouting material is used for treating water leakage of fine cracks such as irregular cracks, expansion joints and settlement joints of a concrete structure, the characteristics of strong permeability, capability of ensuring that slurry can permeate into the cracks with the width of 0.1mm, large elongation, strong deformation resistance, wide temperature adaptation and the like are utilized, the curing speed of the slurry is adjusted according to different water leakage conditions, the requirements of water stop and water shutoff are met, and the repeated waste of materials is reduced.
In China, high-elasticity epoxy sealant is firstly used to be matched with polyester fiber cotton wool to seal cracks, and the cracks are sealed durably and efficiently. Different materials are used in a composite mode, various processes are carried out in a crossed mode, construction tools are reasonably matched, so that multiple fortifications are achieved, the stability is durable, the safe operation of vehicles is guaranteed, the overhaul probability is greatly reduced, the maintenance cost is reduced, and the social benefit is remarkable.
The technology is applied to railway tunnels, has obvious economic benefit and benefits for a long time in one-time construction. The problem of long-term leakage of tunnel facilities is well solved, the service life is prolonged, and the safe and smooth railway tunnel is guaranteed. Moreover, the maintenance frequency can be reduced, the material is saved, the repeated labor is reduced, the maintenance cost is reduced, the generation of secondary pollution is reduced, and the noise is reduced.
Practice proves that the new technology is applied to improve the durability of the tunnel and prolong the service life of the construction engineering, is a great work in the present and in the thousands of autumn, and has obvious social and environmental benefits. The popularization of the new technology is also a matter with important social and economic significance.
The invention meets the requirements of environmental protection and sustainable development, solves the problem of leakage prevention of tunnel facilities, effectively ensures the quality of tunnel construction projects, saves labor and time, prolongs the service life of the project facilities, saves hundreds of millions of huge maintenance funds for national economic construction, and has extremely wide research and development prospects.
The research and the application of the invention conform to the national strategy of green, environmental protection and sustainable development. The invention provides powerful technical support for units such as railway tunnel facility design, construction, maintenance, management and the like. Plays an active promoting role in ensuring the anti-leakage quality of the tunnel engineering facilities; the life and property safety of people is guaranteed, and the safe and smooth trip of people is guaranteed. Meanwhile, the healthy development of the waterproof plugging material and the infrastructure construction in China is effectively promoted.
The invention researches, tests, uses and optimizes the existing domestic waterproof plugging material; the material is correctly selected, the leakage is scientifically stopped and the process is innovated according to different leakage forms, different leakage structures and different leakage parts. The method saves materials, manpower and material resources and reduces construction cost for construction enterprises. And a large amount of maintenance funds are saved for the country. The invention solves the problem of water leakage of the railway tunnel, the innovative process of the invention exceeds the traditional construction method, and the formulated construction guide can effectively guide the design, construction and supervision, so that the leakage stoppage construction of the tunnel has a feasible basis.
The invention can be used for railway tunnel facilities, and can also be widely applied to various reinforced concrete structures, such as highway tunnels, subways, pipe galleries, reservoir power stations, port wharfs and the like. With the continuous application of the invention in the bridge and tunnel disease leakage treatment, the material formula and the construction process are continuously optimized, and the construction equipment is continuously improved, the invention can play a greater role in the maintenance of bridge and tunnel channels. The invention has extremely high popularization and application value and wide market prospect. Based on the reasons, the invention plays an important role in infrastructure construction and maintenance in China.
Claims (2)
1. The method for treating the overturning disease of the ELF railway tunnel is characterized by comprising the following steps of:
s1, dredging and draining
Detecting a water source gathering area in a track grout turning disease area by adopting a radar detector, determining an accurate position, leading water from the position, which is 35cm below a track bed plate, of the bottom of a central drainage channel to the position, which is detected out of the water gathering area by an electric drill, after the accurate position is detected out, drilling a hole with water, wherein the hole diameter is 50mm, the depth is up to the water gathering area, leading water into a drainage tank, and releasing pressure and draining;
s2, arranging and drilling holes on grouting pipes
Cleaning sundries on the wall outside the drainage channel, drilling holes in a crossed manner along two sides of the crack, cleaning sundries in the drainage channel, and uniformly distributing grouting pipes in the drainage channel;
s3 deep grouting
Arranging grouting pipes with the depth of 100-120cm and the hole distance of 80cm, and pouring water into the grouting holes by using a high-pressure pouring machine without dispersing grouting materials; controlling the grouting pressure at 0.2-0.6mpa, and adopting compaction type grouting;
s4 interlayer grouting
Arranging grouting pipes with the depth of 30-60cm and the hole distance of 40cm, pouring acrylate leaking stoppage grouting materials and wet type modified epoxy grouting materials, controlling the grouting pressure at 0.2-0.5mpa, keeping the pressure for 10-30s after adjacent holes or crack surface observation holes start to discharge slurry, observing the slurry discharge condition and pressure condition in the cracks, performing appropriate filling, and repeatedly performing filling again until the pressure change of the grouting is normal, and stopping the grouting;
s5, sealing
After grouting, the exposed grouting nozzle can be removed by confirming that the plugging resin is completely cured; cleaning the leaked solidified grouting liquid; scraping flexible wet material epoxy sealant along the crack, and after the sealant is solidified, scraping anti-vibration disturbance non-solidified waterproof material along the whole crack, wherein the thickness is 3-5 cm;
s6, strengthening and sealing the whole road bed plate
Grouting pipes are arranged on the track bed plate, the distance between transverse holes is 60cm, the distance between longitudinal holes is 100cm, the hole depth is 30-120cm, an acrylate plugging grouting material and a wet modified epoxy grouting material are poured, the grouting pressure is controlled to be 0.2-0.5mpa, and compact grouting is carried out; both sides of the ballast bed plate are coated and sealed by adopting an anti-vibration disturbance never-solidified waterproof material.
2. A method for treating an ELF railway tunnel grout-turning disease is characterized by comprising the following steps of:
s1, dredging and draining
Detecting a water source gathering area in a track grout turning disease area by adopting a radar detector, determining an accurate position, leading water from the position, which is 35cm below a track bed plate, of the bottom of a central drainage channel to the position, which is detected out of the water gathering area by an electric drill, after the accurate position is detected out, drilling a hole with water, wherein the hole diameter is 50mm, the depth is up to the water gathering area, leading water into a drainage tank, and releasing pressure and draining;
s2, cleaning
Cleaning sundries around the bottom, and cleaning a working surface by using high-pressure cleaning equipment;
s3 deep grouting
Arranging grouting pipes with the depth of 100-120cm and the hole distance of 80cm, and pouring an inorganic composite type water non-dispersible grouting material into the grouting holes by using a high-pressure filling machine; controlling the pressure at 0.2-0.6mpa, and performing compact grouting;
s4 interlayer grouting
Arranging grouting pipes with the depth of 30-60cm and the hole distance of 40cm, pouring acrylate plugging grouting materials and wet modified epoxy grouting materials, controlling the grouting pressure to be 0.2-0.5mpa, keeping the pressure for 10-30s after grouting begins to be carried out on adjacent holes or observation holes on the surface of a crack, observing the grouting condition and the pressure condition in the crack, and then carrying out appropriate filling; repeated supplementary grouting is needed, and grouting is stopped until the grouting pressure change is normal;
s5, filling the through crack with polyester fiber cotton wool and epoxy sealant
S6 treatment of side surface of drainage channel and drainage groove
Cleaning a drainage channel and the side surface by using a high-pressure water gun, keeping the drainage channel dry and clean, and blade-coating a high-permeability modified epoxy waterproof material with the thickness of 3.0-3.5mm and the using amount of 25-35kg per meter;
s7, after the upper material is solidified, scraping and coating a never-solidified waterproof material at the crack, wherein the thickness is 3-5mm, and the using amount per meter is 3.0-5.0kg for secondary sealing;
s8, strengthening and sealing the whole road bed plate
Grouting pipes are arranged on the track bed plate, the distance between transverse holes is 60cm, the distance between longitudinal holes is 100cm, the hole depth is 30-120cm, an acrylate plugging grouting material and a wet modified epoxy grouting material are poured, the grouting pressure is controlled to be 0.2-0.5mpa, and compact grouting is carried out; both sides of the ballast bed plate are coated and sealed by adopting an anti-vibration disturbance never-solidified waterproof material.
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