Treatment method for water leakage during underground tunnel construction

Abstract

The present invention discloses a method for treating seepage water during construction of a dark-excavated tunnel, comprising the following steps: (1) detecting and determining the tunnel leakage area; (2) drilling and setting reinforced repair holes; (3) cleaning the interior of the reinforced repair holes; (4) preparing a leak-proof material and a reinforced steel cage; (5) placing the prepared leak-proof material into the prepared reinforced steel cage, and then inserting a plurality of reinforced steel cages into the reinforced repair holes respectively; and (6) sealing the inner surface of the tunnel. The construction method of the present invention can effectively remove bubbles existing during the treatment of leaked water, has a good repair effect and a fast forming speed, and can carry out leaked water treatment in a targeted manner. The construction is simple and convenient, avoids blind and excessive repair construction, greatly saves construction costs, shortens the construction process, and achieves the effect of accurate repair targets and strengthening the overall structural strength of the tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction in underground engineering, and in particular to a method for treating water leakage during construction of a concealed tunnel. Background Art

[0002] In recent years, with the needs of subway, highway and railway construction in my country, a large number of tunnel projects have been built accordingly. During or after the tunnel construction, cracks may occur. There are various types of cracks, and the causes of cracks are also diverse. If cracks in the tunnel are not treated in time, water leakage will inevitably occur. In serious cases, it may even affect the service life of the entire tunnel. Therefore, when cracks are found during tunnel construction, people will promptly carry out corresponding water leakage treatment.

[0003] Existing methods for treating water leakage primarily rely on grouting for repair, which effectively prevents water seepage. However, grouting still has drawbacks during construction. For example, bubbles may be present in the leaking water and injected slurry, which can easily cause cracks in the repaired tunnel surface. Grouting also suffers from poor repair effectiveness, slow forming speed, and poor overall practicality.

[0004] Therefore, it is necessary to improve the existing technology to solve the above technical problems. Summary of the Invention

[0005] To address the aforementioned issues in the prior art, the present invention provides a method for treating seepage water during tunnel construction. This method effectively removes bubbles present during seepage water treatment, provides effective repairs, and rapidly completes the process. Furthermore, it enables targeted repairs, simplifies construction, and avoids blind and excessive repairs. This significantly reduces construction costs, shortens the construction process, and achieves precise repair targets while strengthening the overall structural strength of the tunnel.

[0006] To achieve the above object, the present invention provides a method for treating seepage water during tunnel construction, comprising the following steps:

[0007] (1) Detect and identify tunnel leakage areas; use spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time to identify areas in the tunnel surrounding rock that may leak or have already leaked, mark them, and establish safety assessment criteria;

[0008] (2) drilling and setting up reinforced repair holes; according to the areas and situations where leakage may occur or has occurred as determined in step (1), calculating and analyzing the length and number of reinforced repair holes that meet the requirements of plugging the leak and strengthening the structural strength, and evenly drilling a plurality of reinforced repair holes that meet the length requirements in the area;

[0009] (3) Clean the inside of the reinforced repair hole;

[0010] (4) preparing a plugging material and a reinforcing steel cage; the plugging material is granular, and comprises, from the outside to the inside, an outer water-soluble film, an absorbent layer, an inner water-soluble film, and a self-setting material; the reinforcing steel cage matches the diameter and length of the reinforced repair hole to ensure that the reinforcing steel cage can be inserted exactly into the reinforced repair hole;

[0011] (5) placing the prepared plugging material into the prepared reinforcing steel cage, and then inserting multiple reinforcing steel cages into the reinforced repair holes respectively;

[0012] (6) Tunnel inner surface sealing treatment: Use a plug to seal the reinforced repair hole and keep the plug flush with the tunnel inner surface.

[0013] Preferably, in step (1), using spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time specifically includes the following steps:

[0014] a. Use a drilling rig to drill the surrounding rock at 6-8 different locations within a certain length of the tunnel surrounding rock. After cleaning, use a low-field nuclear magnetic resonance (NMR) instrument to obtain the NMR signal of each surrounding rock to determine the water content, porosity, and permeability of the surrounding rock layer.

[0015] b. Drill multiple monitoring holes of different depths in the tunnel surrounding rock along the radial direction of the tunnel section, clean and dry the holes, and then install a low-field nuclear magnetic resonance sensing device at the bottom of the monitoring holes to monitor the spatial distribution of water in the surrounding rock in real time.

[0016] In any of the above schemes, it is preferred that in step (2), the reinforcement repair holes are drilled radially divergently along the tunnel section, and the spacing between adjacent reinforcement repair holes is 1-2m.

[0017] In any of the above schemes, it is preferred that in step (4), the granular plugging material is spherical or square in shape, and its size is sufficient to prevent it from leaking out from the gaps in the reinforcing steel cage when placed in the reinforcing steel cage; one end of the reinforcing steel cage is closed, and the other end is closed after the plugging material is placed in.

[0018] In any of the above schemes, it is preferred that in step (4), the outer water-soluble film and the inner water-soluble film are composed of the same material, which includes the following components in parts by weight: 30-40 parts of vinylon, 8-12 parts of triethyl 2-hydroxy-1,2,3-propanetricarboxylate, 2.5-4 parts of methylindolecarboxylic acid, 5-8 parts of zinc octadecanoate, 5-8 parts of siloxane, 8-10 parts of carbonyl-4, and 3-4 parts of titanium dioxide.

[0019] In any of the above schemes, preferably, in step (4), the absorbing and releasing layer is composed of the following components in parts by weight: 50-60 parts by weight of bentonite, 20-25 parts by weight of zirconium powder, and 5-8 parts by weight of graphene; wherein the particle size of the bentonite is 5-8 mm, the particle size of the zirconium powder is 200-260 μm, and the graphene is single-layer graphene with a carbon content of 96-97% and a sheet diameter of 70-80 μm.

[0020] In any of the above schemes, it is preferred that in step (4), the self-setting material includes the following components in parts by weight: 40-50 parts of silicate cement, 20-25 parts of cellulose-acrylonitrile graft polymer, 15-20 parts of polyurethane, 5-8 parts of alum stone, 5-10 parts of octyl phthalate, and 8-10 parts of petroleum resin.

[0021] In any of the above schemes, it is preferred that in step (5), according to the leakage situation, the reinforced steel cage is divided into multiple sections by using partition plates, and each section is filled with the plugging material; the partition plates ensure that the plugging materials in adjacent sections do not contact each other.

[0022] The beneficial effects of the present invention are:

[0023] 1. The construction method of the present invention can effectively remove bubbles existing during the treatment of water leakage, has good repair effect and fast forming speed, and can carry out water leakage construction in a targeted manner. The construction is simple, avoiding blind and excessive repair construction, greatly saving construction costs, shortening the construction process, and achieving the effect of accurate repair targets and strengthening the overall structural strength of the tunnel.

[0024] 2. The construction method of the present invention can be used to prevent possible water leakage in the tunnel in advance, and can also be used to strengthen the real-time sealing of water leakage in the tunnel.

[0025] 3. The plugging material adopts a double-layer water-soluble film that can be dissolved in water, so that the self-setting material inside can react with the subsequent leakage water, and form a solidified state by using the self-setting property; and the plugging material is divided into multiple sections by using sealing plates, which can react in sections according to the amount of leakage water, realizing accurate and adaptive reinforcement for the area and object of leakage water, and can be repaired and reinforced at any time according to the leakage situation, with ideal effect.

[0026] 4. The absorbent-release layer in the present invention has a microporous structure and good hydrophilicity. The microporous structure inside it absorbs leaking water. After the outer water-soluble film dissolves in water, the absorbent-release layer first contacts the leaking water and absorbs it. After the inner water-soluble film dissolves in water, the absorbent-release layer material that absorbs the leaking water mixes with the remaining leaking water and the self-curing material, so that the self-curing material begins to solidify. The water inside the absorbent-release layer is slowly released to maintain the humidity inside the self-curing material, which is beneficial to the solidification of the self-curing material. The slow release of leaking water can reduce the accumulation of water in the self-curing material and improve the anti-seepage performance of the self-curing material after solidification. After the water adsorbed by the absorbent-release layer material is slowly released, the air inside the self-curing material enters the absorbent-release layer material, reducing the air inside the self-curing material, thereby reducing the probability of pores and cracks inside the self-curing material, thereby improving the anti-seepage performance of the self-curing material. In this way, the absorbent-release layer realizes the functions of absorption and release.

[0027] 5. The self-setting material of this invention exhibits excellent adhesion, rapid curing, environmental friendliness, and minimal shrinkage. After solidification, it exhibits excellent elasticity and strong adhesion to moist substrates, making it suitable for tunnel anti-seepage and leak prevention. Furthermore, it is easy to apply. The self-setting material can seal cracks in leaking areas, preventing further expansion and ensuring effective sealing.

[0028] 6. The present invention prepares the plugging material in advance and places it into the reinforced steel cage, thus avoiding the tedious operation of on-site grouting; at the same time, the reinforced steel cage remains in the tunnel surrounding rock, and together with the plugging material, strengthens the overall structural strength of the tunnel. DETAILED DESCRIPTION

[0029] The technical solution of the present application will be described in detail below in conjunction with the specific implementation methods of the present application, but the following examples are only for understanding the present invention. The embodiments and features in the embodiments of the present application can be combined with each other, and the present application can be implemented in a variety of different ways as defined and covered by the claims.

[0030] Example 1

[0031] A method for treating water leakage during underground tunnel construction comprises the following steps:

[0032] (1) Detect and identify tunnel leakage areas; use spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time to identify areas in the tunnel surrounding rock that may leak or have already leaked, mark them, and establish safety assessment criteria;

[0033] (2) drilling and setting up reinforced repair holes; according to the areas and situations where leakage may occur or has occurred as determined in step (1), calculating and analyzing the length and number of reinforced repair holes that meet the requirements of plugging the leak and strengthening the structural strength, and evenly drilling a plurality of reinforced repair holes that meet the length requirements in the area;

[0034] (3) Clean the inside of the reinforced repair hole;

[0035] (4) preparing a plugging material and a reinforcing steel cage; the plugging material is granular, and comprises, from the outside to the inside, an outer water-soluble film, an absorbent layer, an inner water-soluble film, and a self-setting material; the reinforcing steel cage matches the diameter and length of the reinforced repair hole to ensure that the reinforcing steel cage can be inserted exactly into the reinforced repair hole;

[0036] (5) placing the prepared plugging material into the prepared reinforcing steel cage, and then inserting multiple reinforcing steel cages into the reinforced repair holes respectively;

[0037] (6) Tunnel inner surface sealing treatment: Use a plug to seal the reinforced repair hole and keep the plug flush with the tunnel inner surface.

[0038] In step (1), using spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time specifically includes the following steps:

[0039] a. Use a drilling rig to drill the surrounding rock at six different locations within a certain length of the tunnel. After cleaning, use a low-field nuclear magnetic resonance (NMR) instrument to obtain the NMR signals of each surrounding rock layer and determine the water content, porosity, and permeability of the surrounding rock layer.

[0040] b. Drill multiple monitoring holes of different depths in the tunnel surrounding rock along the radial direction of the tunnel section, clean and dry the holes, and then install a low-field nuclear magnetic resonance sensing device at the bottom of the monitoring holes to monitor the spatial distribution of water in the surrounding rock in real time.

[0041] In step (2), the reinforcement repair holes are drilled radially along the tunnel section, and the spacing between adjacent reinforcement repair holes is 2m.

[0042] In step (4), the granular plugging material is spherical or square in shape, and its size is sufficient to prevent it from leaking out of the gaps in the reinforcing steel cage when placed in the reinforcing steel cage; one end of the reinforcing steel cage is closed, and the other end is closed after the plugging material is placed in.

[0043] In step (4), the outer water-soluble film and the inner water-soluble film are made of the same material, which includes the following components in parts by weight: 30 parts of vinylon, 12 parts of 2-hydroxy-1,2,3-propanetricarboxylic acid triethyl ester, 2.5 parts of methyl indolecarboxylic acid, 8 parts of zinc octadecanoate, 5 parts of siloxane, 10 parts of carbonyl-4, and 3 parts of titanium dioxide.

[0044] In step (4), the absorbing and releasing layer is composed of the following components in parts by weight: 60 parts of bentonite, 20 parts of zirconium powder, and 8 parts of graphene; wherein the particle size of the bentonite is 5 mm, the particle size of the zirconium powder is 260 μm, and the graphene is single-layer graphene with a carbon content of 96% and a sheet diameter of 80 μm.

[0045] In the step (4), the self-setting material includes the following components in parts by weight: 40 parts of silicate cement, 25 parts of cellulose-acrylonitrile graft polymer, 15 parts of polyurethane, 8 parts of alum stone, 5 parts of octyl phthalate, and 10 parts of petroleum resin.

[0046] In step (5), according to the leakage situation, the reinforced steel cage is divided into multiple sections by using partition plates, and each section is filled with the plugging material; the partition plates ensure that the plugging materials in adjacent sections do not contact each other.

[0047] Example 2

[0048] A method for treating water leakage during underground tunnel construction comprises the following steps:

[0049] (1) Detect and identify tunnel leakage areas; use spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time to identify areas in the tunnel surrounding rock that may leak or have already leaked, mark them, and establish safety assessment criteria;

[0050] (2) drilling and setting up reinforced repair holes; according to the areas and situations where leakage may occur or has occurred as determined in step (1), calculating and analyzing the length and number of reinforced repair holes that meet the requirements of plugging the leak and strengthening the structural strength, and evenly drilling a plurality of reinforced repair holes that meet the length requirements in the area;

[0051] (3) Clean the inside of the reinforced repair hole;

[0052] (4) preparing a plugging material and a reinforcing steel cage; the plugging material is granular, and comprises, from the outside to the inside, an outer water-soluble film, an absorbent layer, an inner water-soluble film, and a self-setting material; the reinforcing steel cage matches the diameter and length of the reinforced repair hole to ensure that the reinforcing steel cage can be inserted exactly into the reinforced repair hole;

[0053] (5) placing the prepared plugging material into the prepared reinforcing steel cage, and then inserting multiple reinforcing steel cages into the reinforced repair holes respectively;

[0054] (6) Tunnel inner surface sealing treatment: Use a plug to seal the reinforced repair hole and keep the plug flush with the tunnel inner surface.

[0055] In step (1), using spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time specifically includes the following steps:

[0056] a. Drilling the surrounding rock at eight different locations within a certain length of the tunnel surrounding rock using a drilling rig. After cleaning, the surrounding rock is tested using a low-field nuclear magnetic resonance (NMR) instrument to obtain the NMR signals of each rock, thereby determining the water content, porosity, and permeability of the surrounding rock strata.

[0057] b. Drill multiple monitoring holes of different depths in the tunnel surrounding rock along the radial direction of the tunnel section, clean and dry the holes, and then install a low-field nuclear magnetic resonance sensing device at the bottom of the monitoring holes to monitor the spatial distribution of water in the surrounding rock in real time.

[0058] In step (2), the reinforcement repair holes are drilled radially along the tunnel section, and the spacing between adjacent reinforcement repair holes is 1m.

[0059] In step (4), the granular plugging material is spherical or square in shape, and its size is sufficient to prevent it from leaking out of the gaps in the reinforcing steel cage when placed in the reinforcing steel cage; one end of the reinforcing steel cage is closed, and the other end is closed after the plugging material is placed in.

[0060] In step (4), the outer water-soluble film and the inner water-soluble film are made of the same material, which includes the following components in parts by weight: 40 vinylon, 8 parts of 2-hydroxy-1,2,3-propanetricarboxylic acid triethyl ester, 4 parts of methyl indolecarboxylic acid, 5 parts of zinc octadecanoate, 8 parts of siloxane, 8 parts of carbonyl-4, and 4 parts of titanium dioxide.

[0061] In step (4), the release layer is composed of the following components in parts by weight: 50 parts of bentonite, 25 parts of zirconium powder, and 5 parts of graphene; wherein the particle size of the bentonite is 8 mm, the particle size of the zirconium powder is 200 μm, and the graphene is single-layer graphene with a carbon content of 97% and a sheet diameter of 70 μm.

[0062] In step (4), the self-setting material includes the following components in parts by weight: 50 parts of silicate cement, 20 parts of cellulose-acrylonitrile graft polymer, 20 parts of polyurethane, 5 parts of alunite, 10 parts of octyl phthalate, and 8 parts of petroleum resin.

[0063] In step (5), according to the leakage situation, the reinforced steel cage is divided into multiple sections by using partition plates, and each section is filled with the plugging material; the partition plates ensure that the plugging materials in adjacent sections do not contact each other.

[0064] Example 3

[0065] A method for treating water leakage during underground tunnel construction comprises the following steps:

[0066] (1) Detect and identify tunnel leakage areas; use spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time to identify areas in the tunnel surrounding rock that may leak or have already leaked, mark them, and establish safety assessment criteria;

[0067] (2) drilling and setting up reinforced repair holes; according to the areas and situations where leakage may occur or has occurred as determined in step (1), calculating and analyzing the length and number of reinforced repair holes that meet the requirements of plugging the leak and strengthening the structural strength, and evenly drilling a plurality of reinforced repair holes that meet the length requirements in the area;

[0068] (3) Clean the inside of the reinforced repair hole;

[0069] (4) preparing a plugging material and a reinforcing steel cage; the plugging material is granular, and comprises, from the outside to the inside, an outer water-soluble film, an absorbent layer, an inner water-soluble film, and a self-setting material; the reinforcing steel cage matches the diameter and length of the reinforced repair hole to ensure that the reinforcing steel cage can be inserted exactly into the reinforced repair hole;

[0070] (5) placing the prepared plugging material into the prepared reinforcing steel cage, and then inserting multiple reinforcing steel cages into the reinforced repair holes respectively;

[0071] (6) Tunnel inner surface sealing treatment: Use a plug to seal the reinforced repair hole and keep the plug flush with the tunnel inner surface.

[0072] In step (1), using spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time specifically includes the following steps:

[0073] a. Use a drilling rig to drill the surrounding rock at seven different locations within a certain length of the tunnel. After cleaning, use a low-field nuclear magnetic resonance (NMR) instrument to obtain the NMR signals of each surrounding rock layer and determine the water content, porosity, and permeability of the surrounding rock layer.

[0074] b. Drill multiple monitoring holes of different depths in the tunnel surrounding rock along the radial direction of the tunnel section, clean and dry the holes, and then install a low-field nuclear magnetic resonance sensing device at the bottom of the monitoring holes to monitor the spatial distribution of water in the surrounding rock in real time.

[0075] In step (2), the reinforcement repair holes are drilled radially along the tunnel section, and the spacing between adjacent reinforcement repair holes is 1.5m.

[0076] In step (4), the granular plugging material is spherical or square in shape, and its size is sufficient to prevent it from leaking out of the gaps in the reinforcing steel cage when placed in the reinforcing steel cage; one end of the reinforcing steel cage is closed, and the other end is closed after the plugging material is placed in.

[0077] In the step (4), the outer water-soluble film and the inner water-soluble film are made of the same material, which includes the following components in parts by weight: 35 parts of vinylon, 10 parts of 2-hydroxy-1,2,3-propanetricarboxylic acid triethyl ester, 3.5 parts of methyl indolecarboxylic acid, 7 parts of zinc octadecanoate, 6 parts of siloxane, 9 parts of carbonyl-4, and 3.5 parts of titanium dioxide.

[0078] In step (4), the release layer is composed of the following components in parts by weight: 55 parts of bentonite, 23 parts of zirconium powder, and 7 parts of graphene; wherein the particle size of the bentonite is 6 mm, the particle size of the zirconium powder is 230 μm, and the graphene is single-layer graphene with a carbon content of 96.5% and a sheet diameter of 75 μm.

[0079] In the step (4), the self-setting material includes the following components in parts by weight: 45 parts of silicate cement, 24 parts of cellulose-acrylonitrile graft polymer, 17 parts of polyurethane, 6 parts of alunite, 9 parts of octyl phthalate, and 9 parts of petroleum resin.

[0080] In step (5), according to the leakage situation, the reinforced steel cage is divided into multiple sections by using partition plates, and each section is filled with the plugging material; the partition plates ensure that the plugging materials in adjacent sections do not contact each other.

[0081] Example 4

[0082] A method for treating water leakage during underground tunnel construction comprises the following steps:

[0083] (1) Detect and identify tunnel leakage areas; use spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time to identify areas in the tunnel surrounding rock that may leak or have already leaked, mark them, and establish safety assessment criteria;

[0084] (2) drilling and setting up reinforced repair holes; according to the areas and situations where leakage may occur or has occurred as determined in step (1), calculating and analyzing the length and number of reinforced repair holes that meet the requirements of plugging the leak and strengthening the structural strength, and evenly drilling a plurality of reinforced repair holes that meet the length requirements in the area;

[0085] (3) Clean the inside of the reinforced repair hole;

[0086] (4) preparing a plugging material and a reinforcing steel cage; the plugging material is granular, and comprises, from the outside to the inside, an outer water-soluble film, an absorbent layer, an inner water-soluble film, and a self-setting material; the reinforcing steel cage matches the diameter and length of the reinforced repair hole to ensure that the reinforcing steel cage can be inserted exactly into the reinforced repair hole;

[0087] (5) placing the prepared plugging material into the prepared reinforcing steel cage, and then inserting multiple reinforcing steel cages into the reinforced repair holes respectively;

[0088] (6) Tunnel inner surface sealing treatment: Use a plug to seal the reinforced repair hole and keep the plug flush with the tunnel inner surface.

[0089] In step (1), using spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time specifically includes the following steps:

[0090] a. Use a drilling rig to drill the surrounding rock at six different locations within a certain length of the tunnel. After cleaning, use a low-field nuclear magnetic resonance (NMR) instrument to obtain the NMR signals of each surrounding rock layer and determine the water content, porosity, and permeability of the surrounding rock layer.

[0091] b. Drill multiple monitoring holes of different depths in the tunnel surrounding rock along the radial direction of the tunnel section, clean and dry the holes, and then install a low-field nuclear magnetic resonance sensing device at the bottom of the monitoring holes to monitor the spatial distribution of water in the surrounding rock in real time.

[0092] In step (2), the reinforcement repair holes are drilled radially along the tunnel section, and the spacing between adjacent reinforcement repair holes is 1.5m.

[0093] In step (4), the granular plugging material is spherical or square in shape, and its size is sufficient to prevent it from leaking out of the gaps in the reinforcing steel cage when placed in the reinforcing steel cage; one end of the reinforcing steel cage is closed, and the other end is closed after the plugging material is placed in.

[0094] In step (4), the outer water-soluble film and the inner water-soluble film are made of the same material, which includes the following components in parts by weight: 33 parts of vinylon, 11 parts of 2-hydroxy-1,2,3-propanetricarboxylic acid triethyl ester, 3 parts of methyl indolecarboxylic acid, 6 parts of zinc octadecanoate, 8 parts of siloxane, 9 parts of carbonyl-4, and 4 parts of titanium dioxide.

[0095] In step (4), the absorbing and releasing layer is composed of the following components in parts by weight: bentonite 53, zirconium powder 21, and graphene 7; wherein the particle size of the bentonite is 6 mm, the particle size of the zirconium powder is 220 μm, and the graphene is single-layer graphene with a carbon content of 97% and a sheet diameter of 73 μm.

[0096] In step (4), the self-setting material includes the following components in parts by weight: silicate cement 48, cellulose-acrylonitrile graft polymer 23, polyurethane 19, alunite 7, octyl phthalate 8, and petroleum resin 10.

[0097] In step (5), according to the leakage situation, the reinforced steel cage is divided into multiple sections by using partition plates, and each section is filled with the plugging material; the partition plates ensure that the plugging materials in adjacent sections do not contact each other.

[0098] In order to further improve the technical effect of the present invention, in this embodiment, the following steps are used to prepare the release layer material:

[0099] (1) Weighing the above-mentioned parts by weight of bentonite, zirconium powder and graphene;

[0100] (2) Mix the above components in a mixer for 5-6 hours to prepare a mixed powder;

[0101] (3) compacting the mixed powder and then sintering it at a temperature of 1700-1800° C. and a vacuum condition of 0.003-0.005 Pa for 2-3 hours to obtain a sintered body with a microporous structure;

[0102] (4) The sintered body is crushed to obtain a substantially uniform particle size of the absorbing and releasing layer material.

[0103] The absorbent-release layer material thus prepared has good air and water absorption capabilities, and can slowly release moisture after contacting the self-curing material, further ensuring the overall leak-proofing effect.

[0104] The self-curing material is prepared by the following steps:

[0105] (1) Mix the above-mentioned parts by weight of Portland cement, cellulose-acrylonitrile graft polymer, polyurethane and petroleum resin, and mechanically stir them at a speed of 500-600 r / min for 20-30 minutes;

[0106] (2) Add the remaining components and stir them mechanically at a speed of 700-800 r / min for 15-20 minutes to obtain a self-setting material with excellent impermeability and high strength.

[0107] The self-curing material thus prepared ensures full reaction between the various components, so that their respective properties are fully guaranteed and exerted, has good bonding properties and strength, and has a fast self-curing speed.

[0108] Example 5

[0109] A method for treating water leakage during underground tunnel construction comprises the following steps:

[0110] (1) Detect and identify tunnel leakage areas; use spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time to identify areas in the tunnel surrounding rock that may leak or have already leaked, mark them, and establish safety assessment criteria;

[0111] (2) drilling and setting up reinforced repair holes; according to the areas and situations where leakage may occur or has occurred as determined in step (1), calculating and analyzing the length and number of reinforced repair holes that meet the requirements of plugging the leak and strengthening the structural strength, and evenly drilling a plurality of reinforced repair holes that meet the length requirements in the area;

[0112] (3) Clean the inside of the reinforced repair hole;

[0113] (4) preparing a plugging material and a reinforcing steel cage; the plugging material is granular, and comprises, from the outside to the inside, an outer water-soluble film, an absorbent layer, an inner water-soluble film, and a self-setting material; the reinforcing steel cage matches the diameter and length of the reinforced repair hole to ensure that the reinforcing steel cage can be inserted exactly into the reinforced repair hole;

[0114] (5) placing the prepared plugging material into the prepared reinforcing steel cage, and then inserting multiple reinforcing steel cages into the reinforced repair holes respectively;

[0115] (6) Tunnel inner surface sealing treatment: Use a plug to seal the reinforced repair hole and keep the plug flush with the tunnel inner surface.

[0116] In step (1), using spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time specifically includes the following steps:

[0117] a. Drilling the surrounding rock at eight different locations within a certain length of the tunnel surrounding rock using a drilling rig. After cleaning, the surrounding rock is tested using a low-field nuclear magnetic resonance (NMR) instrument to obtain the NMR signals of each rock, thereby determining the water content, porosity, and permeability of the surrounding rock strata.

[0118] b. Drill multiple monitoring holes of different depths in the tunnel surrounding rock along the radial direction of the tunnel section, clean and dry the holes, and then install a low-field nuclear magnetic resonance sensing device at the bottom of the monitoring holes to monitor the spatial distribution of water in the surrounding rock in real time.

[0119] In step (2), the reinforcement repair holes are drilled radially along the tunnel section, and the spacing between adjacent reinforcement repair holes is 1.6m.

[0120] In step (4), the granular plugging material is spherical or square in shape, and its size is sufficient to prevent it from leaking out of the gaps in the reinforcing steel cage when placed in the reinforcing steel cage; one end of the reinforcing steel cage is closed, and the other end is closed after the plugging material is placed in.

[0121] In step (4), the outer water-soluble film and the inner water-soluble film are made of the same material, which includes the following components in parts by weight: 37 parts of vinylon, 9 parts of 2-hydroxy-1,2,3-propanetricarboxylic acid triethyl ester, 3.6 parts of methyl indolecarboxylic acid, 7 parts of zinc octadecanoate, 6 parts of siloxane, 8.5 parts of carbonyl-4, and 4 parts of titanium dioxide.

[0122] In step (4), the release layer is composed of the following components in parts by weight: 54 parts of bentonite, 23 parts of zirconium powder, and 7 parts of graphene; wherein the particle size of the bentonite is 6 mm, the particle size of the zirconium powder is 210 μm, and the graphene is single-layer graphene with a carbon content of 97% and a sheet diameter of 76 μm.

[0123] In the step (4), the self-setting material includes the following components in parts by weight: silicate cement 43, cellulose-acrylonitrile graft polymer 22, polyurethane 19, alunite 7, octyl phthalate 9, and petroleum resin 8.

[0124] In step (5), according to the leakage situation, the reinforced steel cage is divided into multiple sections by using partition plates, and each section is filled with the plugging material; the partition plates ensure that the plugging materials in adjacent sections do not contact each other.

[0125] In order to further improve the technical effect of the present invention, in this embodiment, the water-soluble film is prepared by the following steps:

[0126] (1) Place the components in a mixing tank according to the weight parts, stir evenly in an environment of 50-60°C, keep for 10-30 minutes and then cool;

[0127] (2) Continue stirring for 10-20 minutes, raise the temperature to 70-80°C and keep warm, and stir at a speed of 700-800 r / min for 1-1.5 hours;

[0128] (3) performing defoaming treatment to obtain a slurry for standby use;

[0129] (4) The slurry is cast onto a casting device using a die head for drying, molding and post-processing.

[0130] The process for preparing the water-soluble film of the present invention is simple, has good processing stability, is conducive to continuous production, reduces crystallinity, and improves toughness.

[0131] In addition, in order to ensure the technical effect of the present invention, the technical solutions of the above embodiments can be reasonably combined.

[0132] Performance Testing

[0133] 1. Test water-soluble film

[0134] The performance data of the water-soluble film were measured, the water-dissolution time was (35s-45s) / 25℃ water, the elongation at break was 210-220%, and the melt index MI was 1.5-1.8g / 10m.

[0135] From the above data, it can be seen that the water-soluble film has a fast water dissolution rate and stable physical properties.

[0136] 2. Test the release layer material

[0137] The constant pressure method was used to test the air absorption performance according to GB / T25497-2010 standard. The test gas was air. The test results showed that the initial absorption rate of the zirconium graphene absorbent material was 2200ml / (cm 2 .s), which is 60-65% higher than that of traditional zirconium graphite adsorption materials.

[0138] The sample was made using the water seepage height method in GB / T50082-2009 and installed in a water resistance instrument for a permeability test. The water pressure was ensured to be constant between 1.2-1.22 MPa within 24 hours. After 24 hours, the specimen was split and the water mark height was measured with a steel ruler. This was repeated 4 times and the average water mark height was calculated.

[0139] The test results are shown in the table below

[0140] Water mark height (mm) Examples 1-5 16-18

[0141] From the above data, it can be seen that the water absorption and air absorption properties of the release layer are significantly improved.

[0142] 3. Testing self-curing materials

[0143] Add appropriate amount of water to the self-setting material according to the proportion and mix for 5 minutes to form a uniform slurry with good fluidity. Then squeeze the slurry into the prepared simulated drill hole with a length of 20 cm and a diameter of 4 cm. Then monitor the viscosity, complete curing time, compressive strength and bonding strength of the slurry. The specific data are shown in the table below.

[0144] performance data Final setting time (min) 5-7 Compressive strength (MPa) 85-89 Bond strength (MPa) 12-15 Viscosity (mPa.s) 410-420

[0145] From the above data, it can be concluded that the self-setting material has high strength, strong adhesion, short setting time, fast hardening after solidification, and is very effective in sealing water leakage.

[0146] It can be seen from the above embodiments that the construction method of the present invention can effectively remove bubbles present during the treatment of water leakage, has good repair effect and fast forming speed, and can carry out water leakage construction in a targeted manner. The construction is simple, avoiding blind and excessive repair construction, greatly saving construction costs, shortening the construction process, and achieving the effect of accurate repair targets and strengthening the overall structural strength of the tunnel.

[0147] The construction method of the present invention can be used to prevent possible water leakage in the tunnel in advance, and can also be used to strengthen the real-time sealing of water leakage that has already occurred in the tunnel.

[0148] The plugging material uses a double-layer water-soluble film that can dissolve in water, allowing the self-setting material inside to mix and react with the subsequent leakage water, and use the self-setting property to form a solidified state; and the plugging material is divided into multiple sections by using sealing plates, which can react in sections according to the amount of leakage water, realizing precise and adaptive reinforcement of the area and object of leakage water, and can be repaired and reinforced at any time according to the leakage situation, with ideal effect.

[0149] The absorbent layer in the present invention has a microporous structure and good hydrophilicity. The microporous structure inside it absorbs leaking water. After the outer water-soluble film dissolves in water, the absorbent layer first contacts the leaking water and absorbs it. After the inner water-soluble film dissolves in water, the absorbent layer material that absorbs the leaking water mixes with the remaining leaking water and the self-curing material, so that the self-curing material begins to solidify. The water inside the absorbent layer is slowly released to maintain the humidity inside the self-curing material, which is beneficial to the solidification of the self-curing material. The slow release of leaking water can reduce the accumulation of water in the self-curing material and improve the anti-seepage performance of the self-curing material after solidification. After the water adsorbed by the absorbent layer material is slowly released, the air inside the self-curing material enters the absorbent layer material, reducing the air inside the self-curing material, thereby reducing the probability of pores and cracks inside the self-curing material, thereby improving the anti-seepage performance of the self-curing material. In this way, the absorbent layer realizes the functions of absorption and release.

[0150] The self-setting material of the present invention has excellent adhesion, fast curing speed, good environmental protection, and very low shrinkage of the solidified body. After solidification, it has good elasticity and bonding strength to moist bases, making it suitable for anti-seepage and leak-proofing in tunnels. It is also easy to apply. The self-setting material can bond and seal cracks in leaking areas, preventing further expansion and ensuring a good sealing effect.

[0151] The present invention prepares the plugging material in advance and places it into the reinforced steel cage, thus avoiding the tedious operation of on-site grouting; at the same time, the reinforced steel cage remains in the tunnel surrounding rock and, together with the plugging material, strengthens the overall structural strength of the tunnel.

[0152] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A method for treating water leakage during underground tunnel construction, characterized in that: The following steps are involved: (1) Detect and identify tunnel leakage areas; use spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time to identify areas in the tunnel surrounding rock that may leak or have already leaked, mark them, and establish safety assessment criteria; (2) drilling and setting up reinforced repair holes; according to the areas and situations where leakage may occur or has occurred as determined in step (1), calculating and analyzing the length and number of reinforced repair holes that meet the requirements of plugging the leak and strengthening the structural strength, and evenly drilling multiple reinforced repair holes that meet the length requirements in the area; (3) Clean the inside of the reinforced repair hole; (4) preparing a plugging material and a reinforcing steel cage; the plugging material is granular, and comprises an outer water-soluble film, an absorbent layer, an inner water-soluble film and a self-setting material from the outside to the inside; the reinforcing steel cage matches the diameter and length of the reinforcing repair hole to ensure that the reinforcing steel cage can be inserted into the reinforcing repair hole; the granular plugging material is spherical or square, and its size is sufficient to prevent it from leaking out of the gap in the reinforcing steel cage when placed in the reinforcing steel cage; one end of the reinforcing steel cage is closed, and the other end is closed after the plugging material is placed in; the outer water-soluble film and the inner water-soluble film are composed of the same material, which includes the following components in parts by weight: 30-40 vinylon, 8-12 triethyl 2-hydroxy-1,2,3-propanetricarboxylate, 2.5-4 methyl indolecarboxylic acid, 5-8 zinc salt of octadecanoic acid, 5-8 siloxane, and carbonyl-4 8-10, 3-4 titanium dioxide; a water-soluble film was prepared by the following steps: the components were placed in a mixing tank according to weight, stirred evenly in an environment of 50-60 ° C, maintained for 10-30 minutes, and then cooled; stirring was continued for 10-20 minutes, and the temperature was raised to 70-80 ° C and kept warm, and stirred at a speed of 700-800 r / min for 1-1.5 hours; defoaming treatment was performed to obtain a slurry for use; the slurry was cast onto a casting equipment using a die head for drying, forming, and post-processing; (5) placing the prepared plugging material into the prepared reinforcing steel cage, and then inserting multiple reinforcing steel cages into the reinforced repair holes respectively; (6) Tunnel inner surface sealing treatment; Use plugs to seal the reinforced repair holes and keep the plugs flush with the inner surface of the tunnel.

2. The method for treating seepage water during underground tunnel construction according to claim 1, characterized in that: In step (1), using spin imaging technology to detect the spatial distribution of water in the tunnel surrounding rock in real time specifically includes the following steps: a. Use a drilling rig to drill the surrounding rock at 6-8 different locations within a certain length of the tunnel surrounding rock. After cleaning, use a low-field nuclear magnetic resonance (NMR) instrument to obtain the NMR signal of each surrounding rock to determine the water content, porosity, and permeability of the surrounding rock layer. b. Drill multiple monitoring holes of different depths in the tunnel surrounding rock along the radial direction of the tunnel section, clean and dry the holes, and then install a low-field nuclear magnetic resonance sensing device at the bottom of the monitoring holes to monitor the spatial distribution of water in the surrounding rock in real time.

3. The method for treating seepage water during construction of a dark tunnel according to claim 1 or 2, wherein: In step (2), the reinforcement repair holes are drilled radially along the tunnel section, and the spacing between adjacent reinforcement repair holes is 1-2m.

4. The method for treating seepage water during underground tunnel construction according to claim 3, characterized in that: In step (4), the absorbing and releasing layer is composed of the following components in parts by weight: 50-60 parts of bentonite, 20-25 parts of zirconium powder, and 5-8 parts of graphene; wherein the particle size of the bentonite is 5-8 mm, the particle size of the zirconium powder is 200-260 μm, and the graphene is single-layer graphene with a carbon content of 96-97% and a sheet diameter of 70-80 μm.

5. The method for treating seepage water during underground tunnel construction according to claim 4, characterized in that: In step (4), the self-setting material comprises the following components in parts by weight: 40-50 parts of Portland cement, 20-25 parts of cellulose-acrylonitrile graft polymer, 15-20 parts of polyurethane, 5-8 parts of alunite, 5-10 parts of octyl phthalate, and 8-10 parts of petroleum resin.

6. The method for treating seepage water during underground tunnel construction according to claim 5, characterized in that: In step (5), according to the leakage situation, the reinforced steel cage is divided into multiple sections by using partition plates, and each section is filled with the plugging material; the partition plates ensure that the plugging materials in adjacent sections do not contact each other.