CN109681243B - Comprehensive restoration method for tunnel lining two-lining concrete waterproof board exposure - Google Patents
Comprehensive restoration method for tunnel lining two-lining concrete waterproof board exposure Download PDFInfo
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- CN109681243B CN109681243B CN201811537104.0A CN201811537104A CN109681243B CN 109681243 B CN109681243 B CN 109681243B CN 201811537104 A CN201811537104 A CN 201811537104A CN 109681243 B CN109681243 B CN 109681243B
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- waterproof board
- secondary lining
- lining
- waterproof
- concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Abstract
The invention discloses a comprehensive repair method for the exposure of a tunnel lining two-lining concrete waterproof board, which comprises the following steps: a. detecting whether a multilayer waterproof board exists or not by using a geological radar matched with a corresponding antenna; determining the range of the secondary lining needing chiseling; b. excavating and chiseling reinforced concrete in the secondary lining area; c. cutting off the waterproof board of the actual area to be processed, and spraying concrete to form an initial supporting layer; d. a waterproof board which is larger than the secondary lining digging position is used for patching the waterproof layer at the digging position; e. constructing a layer of sealing paste after the waterproof board is repaired; f. arranging anchor bolts on the inner side surface of the secondary lining at the excavation position for drilling holes; g. waterproof is carried out by comprehensively sealing and pasting; h. laying a reinforcing mesh on the inner side surface of the secondary lining at the excavation position; j. building a mould and rebuilding a secondary lining; k. and (5) dismantling a steel die, cutting and modifying. The invention can quickly process the local tunnel lining secondary lining concrete waterproof board exposure, and can effectively solve the problems of safe structure, water prevention and drainage, beautiful tunnel building and the like.
Description
Technical Field
The invention relates to a comprehensive repair method for the exposure of a tunnel lining two-lining concrete waterproof board.
Background
With the rapid development of traffic in China, the mileage of various roads is continuously increased, the number of various tunnels for new construction and operation is increased year by year, various tunnel defects affect the safety of the tunnels, and particularly the common tunnel lining two-lining concrete waterproof board exposes the defects. The tunnel protection generally comprises three layers, namely an initial support layer, a water-resisting layer and a secondary lining layer from inside to outside, wherein the water-resisting layer is mainly made of waterproof boards. However, for various reasons, after the secondary lining layer of the newly-built tunnel is removed, the waterproof board is exposed outside, so that the use safety, drainage and attractiveness of the tunnel are affected, and therefore, traffic quality governing departments and regulations require repair, and the structural safety and the use durability after repair are evaluated.
The newly-built tunnel lining two-lining concrete waterproof board exposes diseases or defects, the reasons need to be checked, and a corresponding method is adopted for processing. Most of the existing repairs only adopt proper excavation and cutting, the concrete on the surface layer is simply repaired, and the integral structure and the waterproof system of the tunnel are damaged.
The document with the Chinese patent number of CN 104373138 discloses a construction method for remodeling a waterproof layer during repairing a tunnel lining structure, but the method cannot solve the related structural safety problems of insufficient thickness of a secondary lining during the exposure treatment of the waterproof board.
The method is only used for treating the exposure of the local tunnel lining secondary lining concrete waterproof board, and can effectively solve the problems of safe structure, water prevention and drainage, attractive tunnel building and the like; however, for the structural safety problem caused by insufficient thickness of the two liners in large area, additional engineering reinforcement measures are needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a comprehensive repair method for the exposed tunnel lining two-lining concrete waterproof board.
The invention is realized by the following modes:
a comprehensive repairing method for the exposed tunnel lining two-lining concrete waterproof board is characterized in that: the method comprises the following steps:
a. detecting whether a multilayer waterproof board exists or not by using a geological radar matched with a corresponding antenna; if the waterproof plate is more than two layers, when the embedding depth of the waterproof plate of the inner layer meets the structural design requirement, only the exposed waterproof plate needs to be treated, the exposed secondary lining is chiseled off, and modified epoxy mortar is adopted for repairing; if the waterproof board is a single-layer waterproof board, determining the range of the secondary lining needing to be chiseled and processed according to the detected thickness of the secondary lining outside the detection and repair area, and making a contour line; the range of processing the secondary lining is not less than 20-40 cm beyond the actual area to be processed;
b. digging and chiseling the reinforced concrete in the secondary lining area without damaging the waterproof board;
c. cutting off the waterproof board of the area to be actually processed, supplementing and excavating the original primary supporting layer and surrounding rocks to the design requirement, and spraying concrete to form the primary supporting layer;
d. patching the waterproof layer at the excavated part by using a waterproof board which is larger than the excavated part of the secondary lining, wherein before patching, the sharp protrusion is treated or is smoothed by adopting mortar to prevent the waterproof board from puncturing a new waterproof layer;
e. after the waterproof board is repaired, a layer of sealing paste is constructed to ensure that the waterproof board does not leak or penetrate water;
f. chiseling the inner side surface of the secondary lining at the excavated position into a rough surface with the concave-convex difference not less than 0.6mm, laying anchor drilling holes with the hole depth of 15-25 cm and the diameter of 25-32 mm, cleaning the holes, injecting a chemical anchoring adhesive, and implanting rust-removing anchors with the diameter of 18-25 mm, wherein the implantation depth is 15cm and the binding force is required to be more than 40 KN;
g. cleaning the waterproof board, and sealing and sticking the waterproof board comprehensively to prevent water and prevent local damage;
h. cleaning the inner side surface of the secondary lining at the excavated part, uniformly coating an interface agent, and laying a reinforcing mesh to ensure that the anchor is firmly welded with the anchor;
j. building a mould and building a secondary lining, namely building the mould and building the secondary lining by adopting C25 self-compaction fine-grain micro-expansive concrete;
k. and (5) dismantling a steel die, cutting and modifying.
Further, the C25 self-compacting fine-particle micro-expansion concrete is formed by mixing 8-12% of grouting agent into the self-compacting fine-particle micro-expansion concrete, wherein the self-compacting fine-particle micro-expansion concrete is formed by mixing cement: sand: crushing stone: the water is mixed according to the mass ratio of 1:1.94:3.16: 0.48.
The invention has the beneficial effects that: the local exposure of the tunnel lining secondary lining concrete waterproof board is quickly processed, so that the problems of safe structure, water prevention and drainage, attractive tunnel building and the like can be effectively solved; the treatment range is defined mainly by test detection; the water seepage prevention after the repair is ensured through the repair and the double-layer waterproof protection; the fine-grained micro-expansion concrete is self-compacted through C25, vibration is not needed, the forming is rapid, and the strength meets the requirement; and the secondary boundary repair makes the tunnel secondary lining attractive in appearance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
icon: 1-initial branch protective layer; 2-waterproof board; and 3-secondary lining.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1:
a comprehensive repairing method for the exposed tunnel lining two-lining concrete waterproof board comprises the following steps as shown in figure 1:
a. matching a geological radar with a corresponding antenna, wherein the type of the geological radar is TSP203 or TSP 203A; detecting whether the multilayer waterproof board 2 exists or not; if the waterproof plate 2 is more than two layers, when the embedding depth of the waterproof plate 2 of the inner layer meets the structural design requirement, only the exposed waterproof plate 2 needs to be processed, the exposed secondary lining 3 is chiseled off, and modified epoxy mortar is adopted for repairing; if the waterproof plate is a single-layer waterproof plate 2, determining the range of the secondary lining 3 to be chiseled according to the detected thickness of the secondary lining outside the detection repair area, and making a contour line; the range of processing the secondary lining 3 is not less than 20-40 cm beyond the actual area to be processed;
b. digging and chiseling the reinforced concrete in the secondary lining 3 area without damaging the waterproof board 2;
c. cutting off the waterproof board 2 of the area to be actually processed, supplementing and excavating the original primary supporting layer and surrounding rocks to the design requirement, and spraying concrete to form the primary supporting layer 1;
d. patching the waterproof layer at the excavated part by using a waterproof board which is larger than the excavated part of the secondary lining 3, wherein before patching, the sharp protrusion is treated or is smoothed by adopting mortar to prevent the waterproof board from puncturing a new waterproof layer;
e. after the waterproof board 2 is repaired, a layer of sealing paste is constructed to ensure that the leakage or the water seepage is not leaked or punctured;
f. chiseling the inner side surface of a secondary lining 3 at an excavated position into a rough surface with the concave-convex difference not less than 0.6mm, laying anchor drilling holes with the hole depth of 15-25 cm and the diameter of 25-32 mm, cleaning the holes, injecting a chemical anchoring adhesive, wherein the chemical anchoring adhesive is mainly used for chemical method bar planting, namely building engineering chemical method bar planting adhesive bar planting, called bar planting and bar planting, is a connecting technology for post-anchoring of a steel bar on the building structure earthquake-resistant reinforcement engineering by utilizing the holding force effect of a structural adhesive locking key, and is the optimal choice for the application of structural bar planting reinforcement and heavy load fastening; implanting derusted anchor nails with the diameter of 18-25 mm, wherein the implantation depth is 15cm, and the binding force is required to be more than 40 KN;
g. cleaning the waterproof board, and sealing and sticking the waterproof board comprehensively to prevent water and prevent local damage;
h. cleaning the inner side surface of the secondary lining 3 at the excavated part, uniformly coating an interface agent, and laying a reinforcing mesh to ensure that the anchor is firmly welded with the anchor;
j. building a mold and building a secondary lining 3, and building the mold and the secondary lining 3 by adopting C25 self-compacting fine-grain micro-expansive concrete;
k. and (5) dismantling a steel die, cutting and modifying.
The C25 self-compacting fine-grain micro-expansion concrete of the invention:
c25 self-compacting fine-grained micro-expansive concrete: the material adopts XHD-D prestressed pipe grouting agent, and has the advantages that: the vibration is not needed, the self-sealing is realized, the strength is high, and the water bleeding and the delamination are avoided; the durability is good, the inorganic grouting material does not age, does not rust the reinforcing steel bar, and is durable and firm; the plump drought is strong, the slight expansion is realized, and the disease restoration is facilitated; firmly bonding with the original concrete on the side surface; the self-compacting fine-particle micro-expansion concrete C25 is convenient to use, 8-12% of grouting agent is doped into the self-compacting fine-particle micro-expansion concrete, and the self-compacting fine-particle micro-expansion concrete is prepared from cement: sand: crushing stone: the water is mixed according to the mass ratio of 1:1.94:3.16: 0.48. The micro-expansion concrete can be used after being mixed, and the recommended mixing amount is based on experiments.
In this embodiment, attention is paid to restore the appearance decoration after the repair process; in the second lining construction of the tunnel during the repair construction, the slab staggering phenomenon exists in the new interface and the old interface due to the uneven splicing of the templates, so that the slab staggering phenomenon exists in the second lining concrete; under the condition that the reinforcing steel bar protective layer is not influenced, a polisher is adopted to polish the two lining staggered platforms within a certain effective range in time, and the appearance is guaranteed to meet the requirements.
The invention quickly processes the local tunnel lining secondary lining concrete waterproof board exposure, and can effectively solve the problems of safe structure, water prevention and drainage, beautiful tunnel building and the like; the treatment range is defined mainly by test detection; the water seepage prevention after the repair is ensured through the repair and the double-layer waterproof protection; the fine-grained micro-expansion concrete is self-compacted through C25, vibration is not needed, the forming is rapid, and the strength meets the requirement; and the secondary boundary repair makes the tunnel secondary lining attractive in appearance.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A comprehensive repairing method for the exposed tunnel lining two-lining concrete waterproof board is characterized in that: the method comprises the following steps:
a. detecting whether a multilayer waterproof board (2) exists or not by matching a geological radar with a corresponding antenna; if the waterproof plate (2) is more than two layers, when the embedding depth of the waterproof plate (2) of the inner layer meets the structural design requirement, only the exposed waterproof plate (2) needs to be treated, the exposed secondary lining (3) is chiseled off, and modified epoxy mortar is adopted for repairing; if the waterproof board is a single-layer waterproof board (2), determining the range of the secondary lining (3) to be chiseled according to the detected thickness of the secondary lining outside the detection repair area, and making a contour line; the range of the secondary lining (3) to be processed is not less than 20-40 cm larger than the actual area to be processed;
b. digging and chiseling the reinforced concrete in the secondary lining (3) area without damaging the waterproof board (2);
c. cutting off the waterproof board (2) of the area to be actually processed, supplementing and excavating the original primary supporting layer and surrounding rocks to the design requirement, and spraying concrete to form the primary supporting layer (1);
d. patching the waterproof layer at the excavated part by using a waterproof board which is larger than the excavated part of the secondary lining (3), wherein a sharp protrusion is processed before patching, or mortar is adopted for leveling so as to prevent the waterproof board from puncturing a new waterproof layer;
e. after the waterproof board (2) is repaired, a layer of sealing paste is constructed to ensure that the waterproof board does not leak or penetrate water;
f. chiseling the inner side surface of the secondary lining (3) at the excavated position into a rough surface with the concave-convex difference not less than 0.6mm, laying anchor bolts for drilling holes with the hole depth of 15-25 cm and the diameter of 25-32 mm, cleaning the holes, injecting a chemical anchoring adhesive, and implanting rust-removing anchor bolts with the diameter of 18-25 mm, wherein the implantation depth is 15cm, and the binding force is required to be more than 40 KN;
g. cleaning the waterproof board, and sealing and sticking the waterproof board comprehensively to prevent water and prevent local damage;
h. cleaning the inner side surface of the secondary lining (3) at the excavated part, uniformly brushing an interface agent, and laying a reinforcing mesh to ensure that the anchor is firmly welded with the anchor;
j. building a mould to construct a secondary lining (3), and building the mould to construct the secondary lining (3) by adopting C25 self-compacting fine-grain micro-expansive concrete;
k. dismantling a steel mould, cutting and modifying;
the C25 self-compacting fine-particle micro-expansion concrete is formed by mixing 8-12% of grouting agent into self-compacting fine-particle micro-expansion concrete, wherein the self-compacting fine-particle micro-expansion concrete is prepared from cement: sand: crushing stone: the water is mixed according to the mass ratio of 1:1.94:3.16: 0.48.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2018109293275 | 2018-08-15 | ||
| CN201810929327 | 2018-08-15 |
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| CN109681243A CN109681243A (en) | 2019-04-26 |
| CN109681243B true CN109681243B (en) | 2020-08-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110486053A (en) * | 2019-09-05 | 2019-11-22 | 贵阳建筑勘察设计有限公司 | A kind of urban track traffic shallow tunnel fault of construction treatment construction method |
| CN110985053B (en) * | 2019-12-20 | 2022-07-08 | 西南交通大学 | Method for renovating large cavity behind support of operating tunnel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373138A (en) * | 2014-10-13 | 2015-02-25 | 中南大学 | Waterproof layer rebuilding construction method in repairing of tunnel lining structure |
| CN105178980A (en) * | 2015-09-07 | 2015-12-23 | 中南大学 | Skylight-forming lining structure repair method for tunnels |
| CN106677803A (en) * | 2017-02-03 | 2017-05-17 | 长安大学 | Structure and method for treating severe disengagement, cracking and other defects of tunnel lining |
| CN107575245A (en) * | 2017-08-21 | 2018-01-12 | 中铁隧道集团二处有限公司 | A kind of laying method of anchor bar of waterproof plate in tunnels |
-
2018
- 2018-12-14 CN CN201811537104.0A patent/CN109681243B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373138A (en) * | 2014-10-13 | 2015-02-25 | 中南大学 | Waterproof layer rebuilding construction method in repairing of tunnel lining structure |
| CN105178980A (en) * | 2015-09-07 | 2015-12-23 | 中南大学 | Skylight-forming lining structure repair method for tunnels |
| CN106677803A (en) * | 2017-02-03 | 2017-05-17 | 长安大学 | Structure and method for treating severe disengagement, cracking and other defects of tunnel lining |
| CN107575245A (en) * | 2017-08-21 | 2018-01-12 | 中铁隧道集团二处有限公司 | A kind of laying method of anchor bar of waterproof plate in tunnels |
Non-Patent Citations (1)
| Title |
|---|
| 隧道常见质量缺陷整治方法;吴光辉;《企业技术开发》;20140301;第33卷(第7期);第32-34页 * |
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Address after: 350008 Building 5, fuwanpian standard workshop, Jinshan industrial concentration area, No. 869, Panyu Road, Gaishan Town, Cangshan District, Fuzhou City, Fujian Province Patentee after: Fujian Luhai Engineering Technology Co.,Ltd. Address before: 350000 workshop No.5, Fuwan area, Jinshan industrial concentration area, no.869, Panyu Road, Gaishan Town, Cangshan District, Fuzhou City, Fujian Province Patentee before: FUJIAN LUHAI ENGINEERING INVESTIGATION & DESIGN CO.,LTD. |
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