CN113217014B - Permanent repair method for tunnel lining cracks by using UHPC material - Google Patents
Permanent repair method for tunnel lining cracks by using UHPC material Download PDFInfo
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- CN113217014B CN113217014B CN202110564257.XA CN202110564257A CN113217014B CN 113217014 B CN113217014 B CN 113217014B CN 202110564257 A CN202110564257 A CN 202110564257A CN 113217014 B CN113217014 B CN 113217014B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 45
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- 239000011487 hemp Substances 0.000 claims description 25
- 239000000945 filler Substances 0.000 claims description 21
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- 239000004568 cement Substances 0.000 claims description 8
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- 239000007924 injection Substances 0.000 claims description 8
- 238000001723 curing Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 4
- 238000001029 thermal curing Methods 0.000 claims description 2
- 201000010099 disease Diseases 0.000 abstract description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 238000013007 heat curing Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
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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
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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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- Life Sciences & Earth Sciences (AREA)
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for permanently repairing a tunnel lining crack by using a UHPC material, which comprises the step of S1, cutting the left wall surface, the right wall surface and the bottom of the tunnel lining crack to obtain a repairing main groove with a rectangular cross section. Step S2, embedding assist: a butterfly-shaped lacing wire is transversely arranged in each group of dovetail butt grooves and the repairing main groove communicated with the dovetail butt grooves; step S22, embedding a grouting water replenishing pipe perpendicular to the bottom of the main repairing groove at the end part of the main repairing groove, which is positioned at the upper end of the tunnel, so that the far end of the grouting water replenishing pipe is positioned in the water draining and replenishing groove and is communicated with the water draining and replenishing groove; a drainage pipe is embedded in the end part of the repair main groove, which is positioned at the lower end of the tunnel, and is vertical to the bottom of the repair main groove; step S3, filling and repairing the main slot and the dovetail pair slot; and S4, maintaining the UHPC material filling body, and completing the repair of the tunnel lining cracks. By adopting the method, the tunnel lining crack disease is treated in situ, the damp-heat curing condition is achieved, the permanent repair is realized, and the safety of the tunnel structure is ensured.
Description
Technical Field
The invention belongs to the technical field of tunnel disease treatment, and particularly relates to a method for permanently repairing a tunnel lining crack by using a UHPC material.
Background
Traditionally, for reinforcing a tunnel lining structure, lining concrete is used as a reinforcing object, engineering measures such as increasing the cross section and adding reinforcing materials are adopted, the bearing capacity of the lining structure is improved, and the reinforcing measures mainly comprise reinforcing measures such as pasting fiber composite materials, pasting steel plates (steel belts), spraying concrete, embedding steel arches, sleeving arches and the like. However, these methods all have some disadvantages: the FRP is pasted, so that the deformation of a tension area on the inner side of the lining can be effectively controlled, but the integral rigidity of the structure cannot be improved; the structure rigidity can be greatly increased by sticking the steel plate lining, but the problems that the construction is complicated due to overlarge dead weight, the rapid construction is not facilitated and the like are faced. Furthermore, the above reinforcing methods have problems of poor high temperature resistance and durability, and the aging of the organic binder causes peeling of the reinforcing layer, resulting in repeated reinforcement of the tunnel.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for permanently repairing the tunnel lining cracks by using the UHPC material, aiming at the defects of the prior art, so that the tunnel lining crack diseases are treated in situ, the damp-heat curing condition is achieved, the permanent repair is realized, and the safety of the tunnel structure is ensured.
In order to solve the technical problems, the invention adopts the technical scheme that a permanent repairing method for a tunnel lining crack by using a UHPC material comprises the following steps:
step S1, performing the construction of slotting the tunnel lining cracks, which comprises the following steps:
step S11, cutting the left wall surface, the right wall surface and the bottom of the tunnel lining crack to obtain a repairing main groove with a rectangular cross section; the main repairing groove is used for filling UHPC material filler;
step S12, arranging a drainage and water-supply tank at the bottom of the main repairing tank, wherein the drainage and water-supply tank takes the central line of the main repairing tank as the central line and the trend of the drainage and water-supply tank is consistent with that of the main repairing tank;
step S13, arranging a plurality of groups of dovetail grooves at intervals along the direction of the repair main groove on the tunnel lining; each dovetail pair groove consists of two trapezoidal grooves, the two trapezoidal grooves are symmetrically distributed on the left side and the right side of the repairing main groove, and the narrow ends are attached to the repairing main groove and communicated with the repairing main groove; and the transverse symmetry axis of the dovetail groove pair is vertical to the central line of the repair main groove.
Step S2, embedding assist:
step S21, transversely placing a butterfly-shaped lacing wire in each group of dovetail butt grooves and the repairing main groove communicated with the dovetail butt grooves, wherein the butterfly-shaped lacing wire transversely stretches across the repairing main groove from left to right, and the left and right ends of the butterfly-shaped lacing wire are correspondingly positioned on the left and right sides in the dovetail butt grooves;
step S22, a grouting water supply pipe is embedded in the end part, located at the upper end of the tunnel, of the repairing main tank and perpendicular to the bottom of the repairing main tank, so that the far end of the grouting water supply pipe is located in the drainage water supply tank and is communicated with the drainage water supply tank, the near end of the grouting water supply pipe is located outside the lining, and the opening of the near end is used as a grouting port or a water injection port;
a drainage pipe is embedded in the end part, positioned at the lower end of the tunnel, of the repairing main tank and vertical to the bottom of the repairing main tank, and a valve is arranged at the outlet of the drainage pipe; the water discharge pipe is used for discharging water injected by the grouting water supplementing pipe and is also used for discharging grout injected by the grouting water supplementing pipe;
step S3, filling and repairing the main slot and the dovetail pair slot, which is as follows:
and S31, filling UHPC materials in the repaired main groove and the dovetail pair groove, leveling and compacting to form a UHPC material filling body, wherein the outer wall surface of the UHPC material filling body is level to the lining surfaces on the left side and the right side.
And step S32, covering and fixing a water retention film on the area filled with the UHPC material filling body, wherein the water retention film is used for keeping the water in the UHPC material filling body.
And S4, maintaining the UHPC material filling body, and completing the repair of the tunnel lining cracks.
Further, step S23 is included after step S22:
step S23, paving hemp filler at the bottom of the main repairing tank and in the water draining and supplementing tank; the hemp thread filling body is used for temporarily draining water and insulating open water and guiding water flow to be discharged outwards, and is also used for providing a wet environment for the UHPC material filling body;
further, step S24 is included after step S23:
s24, arranging heating resistance wires along respective inner contours in the main repairing groove and the dovetail butt groove after the hemp thread filling body is laid, wherein the ends of the heating resistance wires extend out of the tunnel at two ends of the main repairing groove; the end part of the heating resistance wire is connected with a heating power regulator and a power supply;
the heating power regulator is used for automatically switching on and off a power supply, heating and controlling the temperature of the heating resistance wire; the heating resistance wire is used for heating, and provides a thermal curing environment for the UHPC material filling body.
Further, the specific process of step S4 is as follows:
step S41, heating the UHPC material filling body by a heating resistance wire until the UHPC material filling body is solidified;
when water leaks from the cracks of the tunnel lining, water flows along the water drainage and supplementing tank in the heating process, and wets the hemp filler in the flowing process to provide a wet environment for the UHPC material filler;
when no water leakage exists at the crack of the tunnel lining, water is injected from a near-end opening of the grouting water replenishing pipe in the heating process, the injected water flows into the water drainage and replenishing tank, flows along the water drainage and replenishing tank and flows out from an opening of a water drainage pipe, and wets the hemp filler in the flowing process to provide a wet environment for the UHPC material filler; stopping injecting water when the water injection amount of the grouting water supplementing pipe is the same as the water outlet amount of the water discharging pipe;
and continuously injecting water and heating for a plurality of days, injecting water twice every day, and measuring that the strength of the UHPC material filling body is higher than that of the tunnel lining, namely finishing the maintenance.
Step S42, grouting liquid through the near end opening of the grouting water replenishing pipe, filling the hemp filler in the repairing main tank and the drainage water replenishing tank with the grouting liquid, and closing the valve when the grouting liquid flows out from the outlet of the drainage pipe; grouting is continuously performed through the near-end opening of the grouting water replenishing pipe, grouting pressure is increased, small cracks and pores are filled with the grout, and grouting is stopped; after the slurry is solidified, superfine cement grouting bodies are formed in tiny cracks and pores, and the repair is finished.
The invention has the following advantages: 1. the ultra-high temperature and humidity resistant filler can be repaired in situ on a construction site, ensures the solidification temperature and humidity of the UHPC material and the combination with the adjacent tunnel lining in the repairing process, ensures the solidification effect of the UHPC material filler and has good repairability. 2. The method comprises the steps of pretreating a tunnel lining crack, forming a repairing main groove, forming dovetail grooves on the left and right of the repairing main groove, placing butterfly-shaped lacing wires, strengthening tensile strength, anti-cracking strength and shearing strength of two sides of the crack, and strengthening repairing effect. 3. And grouting small cracks and pores deep in the tunnel lining cracks, and forming superfine cement grouting bodies in the small cracks and the pores after the grout is solidified, so that the overall repair of the cracks is ensured.
Drawings
FIG. 1 is a schematic illustration of main slot notching by a permanent repair method for tunnel lining cracks using UHPC material;
FIG. 2 is a schematic view of auxiliary slot notching by a permanent repair method for a tunnel lining crack by using a UHPC material;
FIG. 3 is a schematic diagram of a permanent method of routing buried pipes for tunnel lining cracks using UHPC material;
FIG. 4 is a schematic view of a longitudinal a-a section structure of a crack;
FIG. 5 is a schematic cross-sectional view of a crack along the transverse direction b-b;
FIG. 6 is a schematic view of repair and maintenance of a tunnel lining crack using UHPC material;
FIG. 7 is a schematic cross-sectional view of a repair curing b-b of a tunnel lining crack using UHPC material;
wherein: A. lining cracks of the tunnel; 1. repairing the main groove; 2. a drainage water replenishing tank; 3. dovetail grooves; 4. butterfly-shaped lacing wire; 5. a heating resistance wire; 6. a heating power regulator; 7. grouting water replenishing holes; 8. a drain pipe; 9. a hemp thread filler; a filler of UHPC material; 11. a water-retaining film; 12. ultra-fine cement grout body;
Detailed Description
The invention discloses a permanent repairing method for a tunnel lining crack by using a UHPC material, which comprises the following steps:
step S1, performing slotting construction on the tunnel lining crack A, which comprises the following specific steps:
step S11, cutting the left wall surface, the right wall surface and the bottom of the tunnel lining crack A to obtain a repairing main groove 1 with a rectangular cross section; the main repairing groove 1 is filled with a UHPC material filling body 10; the width of the formed main repairing groove 1 is about 3cm, the depth is about 5cm, and the size design of the main repairing groove 1 meets the repairing requirement after a UHPC material is filled to form a UHPC material filling body 10, as shown in figure 1.
When the tunnel lining is cracked, the depth of a tunnel lining crack A is far larger than 5cm, the width of the crack is unequal, and if the width of the original tunnel lining crack a exceeds 3cm, the tunnel lining crack a is directly used as a repairing main groove 1 without grooving construction.
Step S12 is to provide a drainage and water-supply tank 2 at the bottom of the main repair tank 1, wherein the drainage and water-supply tank 2 has a center line of the main repair tank 1 as its center line, and the direction of the drainage and water-supply tank 2 is identical to the direction of the main repair tank 1. Similarly, if the width of the crack itself at the bottom of the repair main tank 1 exceeds 1cm, the crack at the bottom is used as the drainage and water-supply tank 2 without separately forming a groove.
Step S13, arranging a plurality of groups of dovetail groove pairs 3 on the tunnel lining at intervals along the trend of the repair main groove 1; each group of dovetail butt grooves 3 consists of two trapezoidal grooves which are symmetrically distributed on the left side and the right side of the repairing main groove 1, and the narrow ends of the dovetail butt grooves are attached to the repairing main groove 1 and communicated with the repairing main groove 1; and the transverse symmetry axis of the dovetail groove pair 3 is vertical to the central line of the repair main groove 1. As shown in fig. 2.
The depth of each trapezoid groove is 3cm, the width of the narrow end is 2cm, and the width of the end far away from the repair main groove 1 is 4 cm. During subsequent construction, the dovetail groove pair grooves 3 and the repair main grooves 1 are simultaneously filled with UHPC materials, after the UHPC materials are solidified, the solidified UHPC materials are used as UHPC material filling bodies (10), and the UHPC material filling bodies (10) and the tunnel lining are solidified into a whole, so that the structure is stable. And after the UHPC material in the dovetail groove 3 is solidified, the dovetail groove and the left and right side edges of the crack form a whole, so that the tensile strength, the anti-cracking strength and the shear strength of the two sides of the crack are enhanced, and the repairing effect is enhanced.
Step S2, embedding assist:
step S21, a butterfly tie bar 4 is transversely placed in each group of dovetail pair grooves 3 and the repair main groove 1 communicated therewith, the butterfly tie bar 4 stretches across the repair main groove 1 from left to right, and the left and right ends of the butterfly tie bar are correspondingly positioned on the left and right sides in the dovetail pair grooves 3.
The butterfly-shaped lacing wire 4 adopts smooth round steel bars with the diameter of 10mm, cuts out multiple sections, bends each section into a butterfly shape, namely, stretches across one section of arc-shaped steel bar of the repairing main groove 1 from left to right, both the left end and the right end of the arc-shaped steel bar are bent, plays a role in supporting and stabilizing, is solidified with UHPC material into a whole, enhances the strength of the UHPC material filling body (10), and improves the tensile strength on the left and right sides in the transverse direction so as to improve the tensile strength on two sides of a crack.
Step S22, embedding a grouting water supply pipe 7 at the end part of the main repairing tank 1, which is positioned at the upper end of the tunnel, and perpendicular to the bottom of the main repairing tank 1, so that the far end of the grouting water supply pipe 7 is positioned in the drainage water supply tank 2 and is communicated with the drainage water supply tank 2, the near end of the grouting water supply pipe is positioned outside the lining, and the opening at the near end is used as a grouting port or a water injection port; the grouting water replenishing pipe 7 is a metal pipe with the diameter of 1cm, the metal pipe is L-shaped, one end of the metal pipe is inserted into the bottom of the repairing main groove 1, the other end of the metal pipe is positioned in the tunnel outside the tunnel lining, and the metal pipe is bent to one side and is convenient to connect with a water pipe, as shown in figure 3.
A drain pipe 8 is embedded in the end part of the repair main tank 1, which is positioned at the lower end of the tunnel, and is vertical to the bottom of the repair main tank, and a valve is arranged at the outlet of the drain pipe 8; the water discharge pipe 8 is used for discharging water injected by the grouting water supplementing pipe 7 and also used for discharging grout injected by the grouting water supplementing pipe 7; the drain pipe 8 is a metal bent pipe with the diameter of 2 cm.
Step S23, fully paving hemp thread filling bodies 9 at the bottom of the repairing main tank 1 and in the drainage and water-supplementing tank 2; the hemp thread filling body 9 is used for temporarily draining water and isolating open water and guiding water flow to be discharged outwards, and is also used for providing a wet environment for the UHPC material filling body 10.
The hemp thread filling body 9 is made of long fiber hemp threads, and the thickness of the long fiber hemp threads laid at the bottom of the repairing main groove 1 is 0.5 cm; when water flows through the water storage tank, the water flow is blocked, the speed of the water flow is reduced, water is adsorbed by the water storage tank, and the effect of temporary water storage is achieved. The hemp thread filling body 9 is attached to the UHPC material filling body 10, and water adsorbed by the hemp thread filling body is slowly released, so that the UHPC material filling body 10 is in a humid environment. The moist environment protects the UHPC material fill 10 from cracking during curing.
Step S24, arranging heating resistance wires 5 along respective inner contours in the main repairing groove 1 and the dovetail butt groove 3 after the hemp thread filling body 9 is laid, and extending the ends of the heating resistance wires 5 into the tunnel at two ends of the main repairing groove 1; the end part of the heating resistance wire 5 is connected with a heating power regulator 6 and a power supply; as shown in fig. 4.
The heating resistance wire 5 is wrapped by an insulating skin. Two ends of the heating resistance wire 5 are exposed out of the lining and positioned in the tunnel, the exposed ends are connected with a heating power regulator 6 and are connected with a power supply, wherein the heating power regulator 6 can automatically regulate power, the temperature of the heating resistance wire 5 is maintained at 40-50 ℃, the temperature difference of the junction of the lining and the UHPC material filling body 10 is reduced, the temperature of the lining and the UHPC material filling body 10 is basically the same, and the adhesion between the lining and the HPC material filling body 10 is better and the adhesion is more firm in the solidification process of the HPC material filling body 10.
Step S3, filling and repairing the main slot 1 and the dovetail pair slot 3, specifically as follows:
preparing a UHPC material filling body 10, wherein the composition of the UHPC material filling body mainly comprises high-grade cement and high-efficiency minerals, blending active powder and a high-efficiency water reducing agent in a certain proportion, adopting a low water-cement ratio, adding and blending small-size steel fibers for toughening, and removing coarse aggregates to obtain the UHPC material filling body. The UHPC material can be purchased as a finished product or self-contained.
Step S31, filling UHPC materials in the repair main groove 1 and the dovetail butt groove 3, leveling and compacting to form a UHPC material filling body 10, wherein the outer wall surface of the UHPC material filling body 10 is level with the lining surfaces on the left side and the right side;
step S32, covering and fixing a water-retaining film 11 on the area filled with the UHPC material filling body 10, wherein the water-retaining film 11 is a high-molecular plastic film, and is adhered and fixed on the liner by using an adhesive tape for retaining the water in the UHPC material filling body 10, so that the UHPC material filling body 10 is in a humid environment in the curing process, and the surface of the UHPC material filling body 10 is prevented from cracking.
Step S4, curing the UHPC material filling body 10, which comprises the following specific steps: as shown in fig. 5, 6 and 7:
and step S41, heating the UHPC material filling body 10 by adopting the heating resistance wire 5 until the UHPC material filling body 10 is solidified.
When water leaks from the cracks of the tunnel lining, water flows along the water drainage and supplementing tank 2 in the heating process, and wets the hemp filler 9 in the flowing process, so that a wet environment is provided for the UHPC material filler 10.
The tunnel lining crack a has two conditions of water leakage and water leakage, if water leaks from the tunnel lining crack a, the underground water infiltrates the hemp thread filling body 9 and also infiltrates the UHPC material filling body 10 in the process of downward leakage, so that the UHPC material filling body 10 is cured in a humid environment, and the surface cracking of the UHPC material filling body is avoided.
If the crack has no water leakage, the water can be supplemented to the crack through the grouting water supplementing pipe 7, the water is injected for 2 times every day, and the process is as follows:
in the heating process, water is injected from a near-end opening of the grouting water replenishing pipe 7, the injected water flows into the drainage water replenishing tank 2, flows along the drainage water replenishing tank 2, flows out from an opening of the drainage pipe 8, wets the hemp filler 9 in the flowing process, and provides a wet environment for the UHPC material filler 10; when the water injection amount of the grouting water supplementing pipe 7 is the same as the water outlet amount of the water discharging pipe 8, stopping water injection;
the continuous water injection maintenance time is not less than 7 days, water is injected twice every day, strength is measured at five or more positions of the UHPC material filling body 10 by using a resiliometer, the strength is higher than that of the tunnel lining, the standard of maintenance completion is reached, and the maintenance is finished. After the curing is finished, the heating power regulator 6 can be disassembled and recovered, and the water-retaining film 11 can be disassembled.
Step S42, grouting liquid from the near end opening of the grouting water-replenishing pipe 7, filling the hemp filler 10 in the repairing main tank 1 and the drainage water-replenishing tank 2 with the grouting liquid, and closing the valve when the grouting liquid flows out from the outlet of the drainage pipe 8; and (3) continuing grouting from the near-end opening of the grouting water replenishing pipe 7, wherein the grout is in a closed space, the grout fills fine cracks and pores in the deep part of the tunnel lining crack a along with the increase of grouting pressure, and the grouting is stopped when the pressure is kept unchanged.
After the slurry in the small cracks and the pores is solidified, superfine cement grout 12 is formed in the small cracks and the pores, the fine cement grout 12 is not independent of the small cracks, and is attached to the circumferential wall surfaces of the small cracks in the solidification process to form a whole, so that the small cracks are plugged, and then the repair is completed.
Claims (5)
1. A permanent repair method for a tunnel lining crack by using a UHPC material is characterized by comprising the following steps:
step S1, carrying out slotting construction on the tunnel lining crack (A), which comprises the following specific steps:
s11, cutting the left wall surface, the right wall surface and the bottom of the tunnel lining crack (A) to obtain a repairing main groove (1) with a rectangular cross section; the repairing main groove (1) is internally used for filling a UHPC material filling body (10);
step S12, arranging a drainage and water supplementing groove (2) at the bottom of the repairing main groove (1), wherein the drainage and water supplementing groove (2) takes the central line of the repairing main groove (1) as the central line and the trend of the drainage and water supplementing groove is consistent with that of the repairing main groove (1);
step S13, forming a plurality of groups of dovetail groove pairs (3) on the tunnel lining at intervals along the trend of the repair main groove (1); each group of dovetail butt grooves (3) consists of two trapezoidal grooves which are symmetrically distributed on the left side and the right side of the repairing main groove (1), and the narrow ends of the dovetail butt grooves are attached to the repairing main groove (1) and communicated with the repairing main groove (1); the transverse symmetry axis of the dovetail pair groove (3) is vertical to the central line of the repair main groove (1);
step S2, embedding assist:
step S21, transversely placing a butterfly-shaped lacing wire (4) in each group of dovetail butt grooves (3) and the repairing main groove (1) communicated with the dovetail butt grooves, wherein the butterfly-shaped lacing wire (4) transversely stretches across the repairing main groove (1) from left to right, and the left and right ends of the butterfly-shaped lacing wire are correspondingly positioned on the left and right sides in the dovetail butt grooves (3);
step S22, embedding a grouting water replenishing pipe (7) at the end part of the repairing main tank (1) positioned at the upper end of the tunnel, wherein the end part is perpendicular to the bottom of the repairing main tank (1), the far end of the grouting water replenishing pipe (7) is positioned in the drainage water replenishing tank (2) and is communicated with the drainage water replenishing tank (2), the near end of the grouting water replenishing pipe is positioned outside the lining, and the opening of the near end is used as a grouting port or a water filling port;
a drain pipe (8) is embedded in the end part, positioned at the lower end of the tunnel, of the repairing main tank (1) and vertical to the bottom of the repairing main tank, and a valve is arranged at the outlet of the drain pipe (8); the water discharge pipe (8) is used for discharging water injected by the grouting water supplementing pipe (7) and also used for discharging slurry injected by the grouting water supplementing pipe (7);
step S3, filling and repairing the main groove (1) and the dovetail pair groove (3), which is as follows:
step S31, filling UHPC materials in the repair main groove (1) and the dovetail butt groove (3), leveling and compacting to form a UHPC material filling body (10), wherein the outer wall surface of the UHPC material filling body (10) is level with the lining surfaces on the left side and the right side;
and S4, curing the UHPC material filling body (10) to finish the repair of the tunnel lining crack (A).
2. The method for permanently repairing cracks in tunnel lining by using UHPC material as claimed in claim 1, further comprising step S23 after the step S22:
step S23, paving hemp thread filling bodies (9) at the bottom of the repairing main tank (1) and in the drainage and water supplementing tank (2); the hemp thread filling body (9) is used for temporarily draining water and insulating open water and guiding water flow to be discharged outwards, and is also used for providing a wet environment for the UHPC material filling body (10).
3. The method for permanently repairing cracks in tunnel lining by using UHPC material as claimed in claim 2, wherein the method further comprises step S24 after the step S23:
s24, arranging heating resistance wires (5) in the repairing main groove (1) and the dovetail butt groove (3) after the hemp thread filling body (9) is laid, wherein the heating resistance wires (5) are arranged along the inner contours of the repairing main groove (1), and the ends of the heating resistance wires (5) extend out of the tunnel at two ends of the repairing main groove (1); the end part of the heating resistance wire (5) is connected with a heating power regulator (6) and a power supply;
the heating power regulator (6) is used for automatically switching on and off a power supply, heating and controlling the temperature of the heating resistance wire (5); the heating resistance wire (5) is used for heating, and provides a thermal curing environment for the UHPC material filling body (10).
4. The method for permanently repairing the cracks of the tunnel lining by using the UHPC material as claimed in claim 3, wherein the specific process of the step S4 is as follows:
step S41, heating the UHPC material filling body (10) by the heating resistance wire (5) until the UHPC material filling body (10) is solidified;
when water leaks from the cracks of the tunnel lining, water flows along the water drainage and supplementing tank (2) in the heating process, and wets the hemp filler (9) in the flowing process to provide a wet environment for the UHPC material filler (10);
when no water leakage exists at the crack of the tunnel lining, water is injected from a near-end opening of the grouting water supplementing pipe (7) in the heating process, the injected water flows into the drainage water supplementing tank (2), flows along the drainage water supplementing tank (2), flows out from an opening of the drainage pipe (8), wets the hemp filler (9) in the flowing process, and provides a wet environment for the UHPC material filler (10); when the water injection amount of the grouting water supplementing pipe (7) is the same as the water outlet amount of the water discharging pipe (8), stopping water injection;
continuously injecting water and heating for multiple days, injecting water twice a day, and measuring that the strength of the UHPC material filling body (10) is higher than that of the tunnel lining, namely finishing maintenance;
step S42, grouting liquid from the near end opening of the grouting water replenishing pipe (7), filling the hemp filler in the repairing main tank (1) and the drainage water replenishing tank (2) with the grouting liquid, and closing the valve when the grouting liquid flows out from the outlet of the drainage pipe (8); grouting is continuously performed through the near-end opening of the grouting water replenishing pipe (7), grouting pressure is increased, small cracks and pores are filled with the grout, and grouting is stopped; after the slurry is solidified, an ultra-fine cement grout body (12) is formed in the fine cracks and pores, and the repair is completed.
5. The method for permanently repairing cracks in a tunnel lining by using the UHPC material as claimed in claim 4, wherein the method further comprises after step S31: and step S32, covering and fixing a water-retaining film (11) on the area filled with the UHPC material filling body (10) for keeping the moisture in the UHPC material filling body (10).
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| CN115492420A (en) * | 2022-11-02 | 2022-12-20 | 上海建为历保科技股份有限公司 | Deviation rectifying and centering and structure reinforcing method for rammed earth wall |
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| JP2001173379A (en) * | 1999-12-14 | 2001-06-26 | Tekken Constr Co Ltd | Repair structure and repair construction method of tunnel |
| JP3340987B2 (en) * | 2000-02-16 | 2002-11-05 | 株式会社ケー・エフ・シー | Repair structure of concrete structure |
| CN101832143B (en) * | 2010-04-02 | 2011-09-07 | 云南云岭高速公路养护绿化工程有限公司 | Method for treating tunnel water leakage |
| CN110905555A (en) * | 2019-12-11 | 2020-03-24 | 湘潭大学 | UHPC lining structure for tunnel and construction method thereof |
| CN212837838U (en) * | 2020-07-13 | 2021-03-30 | 南京林业大学 | Secondary lining combined reinforcing structure for operating tunnel |
| CN112761676A (en) * | 2021-02-04 | 2021-05-07 | 岳阳市公路桥梁基建总公司 | UHPC tunnel lining structure and construction method thereof |
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