CN112593978A - Secondary lining vault anti-disengaging device and construction method - Google Patents
Secondary lining vault anti-disengaging device and construction method Download PDFInfo
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- CN112593978A CN112593978A CN202011414096.8A CN202011414096A CN112593978A CN 112593978 A CN112593978 A CN 112593978A CN 202011414096 A CN202011414096 A CN 202011414096A CN 112593978 A CN112593978 A CN 112593978A
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- 238000010276 construction Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 66
- 239000004567 concrete Substances 0.000 claims abstract description 36
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 239000004744 fabric Substances 0.000 claims abstract description 17
- 239000011800 void material Substances 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 16
- 238000009415 formwork Methods 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 210000002310 elbow joint Anatomy 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 description 6
- 230000008023 solidification Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a secondary lining vault anti-disengaging device and a construction method, wherein a secondary lining is arranged below a primary lining of the device, a lower layer reinforcing mesh and an upper layer reinforcing mesh are arranged in the secondary lining, a bottom template is arranged below a next section of secondary lining and is in lap joint with the previous section of secondary lining, an end template is arranged in front of the next section of secondary lining, a horizontal grouting pipe I and a horizontal exhaust pipe I are arranged below the primary lining, small holes are fully punched on the horizontal grouting pipe I and the horizontal exhaust pipe I and are wrapped with filter cloth, 3-6 detection pipes are arranged along the central axis of each section of secondary lining, the top of each detection pipe is 1-2cm lower than the surface of the primary lining, and the detection pipes penetrate through positioning sleeves fixed on the upper layer reinforcing mesh and the lower layer reinforcing mesh. The invention can prevent the concrete of the secondary lining vault of the tunnel from being hollow and improve the construction quality of the secondary lining.
Description
Technical Field
The invention relates to tunnel secondary lining construction, in particular to a secondary lining vault anti-disengaging device and a construction method.
Background
In the tunnel construction process, the tunnel is often firstly supported in the primary support in the prior art, and then secondary lining concrete is poured. Because the influence of tunnel secondary lining concrete construction defect and the shrinkage factor of concrete self, inevitable can appear the space even cavity between two lining concrete that the tunnel vault was pour and the preliminary bracing, because the expend with heat and contract with cold effect of air in the cavity, can make secondary lining concrete crack when serious, lead to the tunnel top to leak, lead to burying the potential safety hazard for subsequent tunnel traffic.
The prior technical scheme is as follows: the first conventional technology is as follows: after lining construction is finished, detecting the secondary lining by means of ultrasonic waves and the like, and detecting the drilling and grouting at the void position, wherein the technical detection process is troublesome, and the secondary lining can be damaged by the drilling and grouting; the second conventional technique is: and (6) embedding a grouting pipe. Because the distribution of the void points is not uniform, the void points cannot be determined in advance, and the effect is not ideal; the traditional technology three: and (5) grouting with a mold. The traditional grouting technology with the mold is used for grouting under the condition that a template is not removed, and the grouting pressure can damage the secondary lining which does not achieve the strength.
Disclosure of Invention
The invention aims to provide a secondary lining vault anti-disengaging device and a construction method aiming at the defects of the prior art.
The purpose of the invention is realized by the following technical scheme: a secondary lining vault anti-hollowing device is provided, wherein a secondary lining is arranged below a primary lining, a lower layer steel bar mesh and an upper layer steel bar mesh are arranged in the secondary lining, a bottom template is arranged below a next section of secondary lining and is lapped with a previous section of secondary lining, an end template is arranged in front of the next section of secondary lining, a horizontal grouting pipe I and a horizontal exhaust pipe I are arranged below the primary lining, the horizontal grouting pipe I and the horizontal exhaust pipe I are arranged on a support frame in parallel and horizontally, the support frame is fixed on the upper layer steel bar mesh, the horizontal grouting pipe I and the horizontal exhaust pipe I are provided with small holes and wrapped with filter cloth, the horizontal grouting pipe I is connected with a vertical grouting pipe I through a bent pipe joint, the horizontal exhaust pipe I is connected with a vertical exhaust pipe I through a bent pipe joint, 3-6 detection pipes are arranged along the central axis of each section of secondary lining, the top of each detection pipe is 1-2cm lower, the detection pipe penetrates through the positioning sleeves fixed on the upper layer reinforcing mesh and the lower layer reinforcing mesh, and the bottom of the detection pipe extends out of the bottom template and is fixed on the bottom template through the fixing ring.
Furthermore, the first vertical grouting pipe and the first vertical exhaust pipe extend out of the bottom template.
Furthermore, a second horizontal grouting pipe and a second horizontal exhaust pipe are vertically arranged on the support frame and the detection pipe, the second horizontal grouting pipe and the second horizontal exhaust pipe are arranged in parallel, and the pipe body structure is the same as that of the first horizontal grouting pipe and the first horizontal exhaust pipe.
Furthermore, sealing rubber is arranged at the positions where the first vertical grouting pipe, the first vertical exhaust pipe and the detection pipe extend out of the bottom template.
Further, a port plugging body is arranged at the joint of the upper section of the secondary lining and the lower section of the secondary lining.
Furthermore, the bottom template of the next section and the secondary lining of the previous section have certain overlapping length.
Furthermore, the support frame is evenly arranged along the grouting pipe and the exhaust pipe, is formed by welding steel bars and is welded on the upper layer steel bar net.
Furthermore, the detection tube is made of a hard plastic tube.
The invention also provides a construction method of the secondary lining vault anti-disengaging device, which comprises the following steps:
s1, constructing a primary lining;
s2, manufacturing a first horizontal grouting pipe, a first horizontal exhaust pipe, a second horizontal grouting pipe and a second horizontal exhaust pipe by adopting steel pipes, drilling grouting holes or exhaust holes on a pipe body, and wrapping the pipe body by using filter cloth;
s3, installing an upper-layer steel bar mesh, fixing a support frame and a positioning sleeve on the upper-layer steel bar mesh, and placing a first horizontal grouting pipe and a first horizontal exhaust pipe on the support frame;
s4, installing a lower layer of reinforcing mesh and a fixed positioning sleeve, installing a bottom template and an end template of the secondary lining, and forming holes in the corresponding positions of a first vertical grouting pipe, a first vertical exhaust pipe and a detection pipe on the bottom template and the end template;
s5, penetrating a detection pipe into a positioning sleeve from a bottom template upwards until the surface of the primary lining is lined, then moving the detection pipe downwards for 1-2cm, fixing the detection pipe on the bottom template by using a fixing ring and sealing by using sealing rubber;
s6, pouring secondary lining concrete of the first section step by step in the sequence of firstly pouring two sides and then pouring the concrete continuously until slurry flows out of the detection pipe, removing the detection pipe, filling the gap of the detection pipe, and sealing the bottom template opening at the position;
s7, removing the template after the secondary lining solidification reaches the template removal strength, generating a void space at the top after the secondary lining solidification, chiseling loose concrete at the first horizontal grouting pipe and the first horizontal exhaust pipe at the end of the secondary lining, and injecting cement mortar to form a port plugging body;
s8, connecting the first horizontal grouting pipe with the first vertical grouting pipe through a bent pipe joint, and connecting the first horizontal exhaust pipe with the first vertical exhaust pipe through the bent pipe joint;
s9, processing an upper layer steel bar mesh of the second section of secondary lining, fixing a support frame and a positioning sleeve on the upper layer steel bar mesh, and placing a horizontal grouting pipe II and a horizontal exhaust pipe on the support frame;
s10, processing and installing a lower layer reinforcing mesh and a positioning sleeve of a second section of secondary lining, installing a bottom template and an end template of the second section of secondary lining, and opening holes at corresponding positions of a first vertical grouting pipe, a first vertical exhaust pipe and a detection pipe on the bottom template and the end template;
s11, penetrating a detection pipe into a positioning sleeve from a bottom template of the second section of secondary lining upwards until the surface of the primary lining, then moving the detection pipe downwards for 1-2cm, fixing the detection pipe on the bottom template by using a fixing ring and sealing by using sealing rubber;
s12, connecting the first horizontal grouting pipe with a compression pump to introduce compressed air into a void of the first section of the secondary lining, enabling the compressed air to overflow from the grouting hole at a high speed and break away filter cloth wrapped on a pipe body, and enabling the compressed air to enter the first horizontal exhaust pipe from an exhaust hole of the first horizontal exhaust pipe and be exhausted out of the secondary lining;
s13, connecting a first horizontal exhaust pipe with a compression pump to introduce compressed air into a void of the secondary lining in the first stage, enabling the compressed air to overflow from an exhaust hole at a high speed and break away filter cloth wrapped on a pipe body, and enabling the compressed air to enter a first horizontal grouting pipe from a grouting hole of the first horizontal grouting pipe and be discharged out of the secondary lining;
s14, pouring second-section secondary lining concrete until the detection pipe overflows slurry;
s15, connecting the first vertical grouting pipe with a grouting pump while pouring the second section of secondary lining concrete, injecting cement slurry into the first stage of secondary lining void through the horizontal grouting pipe, and discharging air in the void from the first horizontal exhaust pipe and the first vertical exhaust pipe;
s16, connecting the first vertical exhaust pipe with a grouting pump, and injecting cement slurry into the first horizontal exhaust pipe to complete void grouting;
s17, after the second section of lining concrete is solidified to meet the requirement of form removal, repeating the steps S7-S16, and carrying out construction of the next section.
The invention has the beneficial effects that:
1. the invention can prevent the tunnel secondary lining concrete from being hollow, improve the construction quality of the secondary lining and ensure that the stress of the secondary lining is more reasonable and uniform;
2. whether newly cast concrete is poured to the vault or not can be detected through the detection pipe, and slurry can flow out of the detection pipe if the newly cast concrete is poured to the vault, so that the concrete can be guaranteed to be poured to fill a secondary lining space, and the later-stage solidification void amount is reduced;
3. the void part which is inevitable for concrete solidification can be injected with micro-expansion cement paste through the grouting pipe to fill the void space, so that the void problem of the secondary lining concrete is thoroughly solved.
4. Due to the arrangement of the grouting pipe and the exhaust pipe, air in the void can be smoothly exhausted, and the void can not be completely filled due to the formation of compressed air in the void;
5. the exhaust pipe and the grouting pipe are wrapped with filter cloth so as to prevent concrete cement slurry from blocking a grouting hole or an exhaust hole, and the filter cloth can be flushed by high-pressure air before grouting to smoothly perform grouting;
6. the grouting filling of the first section of secondary lining and the pouring construction of the second section of secondary lining are carried out simultaneously without mutual influence, so that the construction efficiency is obviously improved;
7. the grouting pipe and the exhaust pipe extend into the finished secondary lining in the first stage from the lining part being cast in the second stage to perform grouting operation, so that the phenomenon that holes are drilled on the finished secondary lining for grouting or grouting holes are reserved is avoided, and the finished secondary lining is prevented from being damaged;
8. the method of the invention is adopted to carry out grouting treatment and void in the finished secondary lining, the finished secondary lining has enough strength, and the grouting pressure can not damage the concrete. The traditional grouting technology with the mold is used for grouting under the condition that a template is not removed, and the grouting pressure can damage the secondary lining which does not achieve the strength.
Drawings
FIG. 1 is a schematic view of a secondary lining vault anti-voiding apparatus;
description of reference numerals: 1. primary lining; 2. secondary lining; 3. a bottom template; 4. an end template; 5. a lower layer reinforcing mesh; 6. an upper layer of reinforcing mesh; 71. a horizontal grouting pipe I; 72. a second horizontal grouting pipe; 81. a first horizontal exhaust pipe; 82. a second horizontal exhaust pipe; 9. void removal; 11. a support frame; 12. a pipe bending joint; 13. a first vertical grouting pipe; 14. a first vertical exhaust pipe; 15. a detection tube; 16. positioning the sleeve; 17. a fixing ring; 19. sealing rubber; 20. a port blocking body.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Referring to fig. 1, the present invention provides a secondary lining vault anti-escape apparatus, a secondary lining 2 is provided below a primary lining 1, a lower layer reinforcing mesh 5 and an upper layer reinforcing mesh 6 are provided in the secondary lining 2, a bottom form 3 is provided below a next section of the secondary lining and overlaps with a previous section of the secondary lining, and an end form 4 is provided in front of the next section of the secondary lining. The bottom formwork 3 and the end formwork 4 are used for pouring a secondary lining of the second section, and are lapped with the secondary lining of the first section for a certain length in order to prevent slurry leakage. A horizontal grouting pipe I71 and a horizontal exhaust pipe I81 are arranged below the primary lining 1, the horizontal grouting pipe I71 and the horizontal exhaust pipe I81 are arranged on a support frame 11 in parallel and horizontally, and the support frame 11 is welded on the upper-layer steel mesh 6. The horizontal grouting pipe I71 and the horizontal exhaust pipe I81 are arranged at the top of the first section of the secondary lining and used for grouting a clearance 9 for compacting the secondary lining, the horizontal grouting pipe 72 and the horizontal exhaust pipe 82 are arranged at the top of the second section of the secondary lining and fixed on the support frame 11 and arranged perpendicular to the detection pipe 15, the horizontal grouting pipe II 72 and the horizontal exhaust pipe II 82 are arranged in parallel, the pipe body structure is the same as that of the horizontal grouting pipe I71 and the horizontal exhaust pipe I81, and the support frame 11 is uniformly arranged along the grouting pipe and the exhaust pipe, is formed by welding reinforcing steel bars and is welded on the upper layer of the reinforcing mesh 6. The secondary lining of the second section in fig. 1 has not yet been cast, and is not illustrated in fig. 1. And simultaneously the pouring construction of the secondary lining of the second section can be carried out, and the void space 9 of the secondary lining of the first section can be filled by grouting through the horizontal grouting pipe I71 and the horizontal exhaust pipe I81. So on the one hand can accomplish slip casting to fill the void space and improve the efficiency of construction simultaneously with second festival section secondary lining construction, on the other hand can carry out void space slip casting again after first festival section secondary lining reaches the strength requirement, avoids slip casting pressure to damage first festival section secondary lining. The first horizontal grouting pipe 71 and the first horizontal exhaust pipe 81 are perforated with small holes all over the body and wrapped with filter cloth. The filter cloth is wrapped to prevent cement paste in concrete from blocking a grouting hole, the filter cloth is broken through air compression before grouting, and then grouting is carried out. The horizontal grouting pipe I71 is connected with a vertical grouting pipe I13 through an elbow joint 12, the horizontal exhaust pipe I81 is connected with a vertical exhaust pipe I14 through the elbow joint 12, and the vertical grouting pipe I13 and the vertical exhaust pipe I14 both extend out of the bottom template 3. The first vertical grouting pipe 13 and the first vertical exhaust pipe 14 are not arranged in the secondary lining of the first section but arranged in the second section, so that the defect of the poured secondary lining can be avoided, the first vertical grouting pipe 13 and the first vertical exhaust pipe 14 can be dismounted in a reverse rotating mode after grouting is finished, and the horizontal grouting pipe and the horizontal exhaust pipe are reserved in the lining. 3-6 detection pipes 15 are arranged along the central axis of each section of the secondary lining 2, the detection pipes 15 are made of hard plastic pipes, the tops of the detection pipes 15 are lower than the surface of the primary lining 1 by 1-2cm, the detection pipes 15 penetrate through positioning sleeves 16 fixed on the upper layer reinforcing mesh 6 and the lower layer reinforcing mesh 5, and the bottoms of the detection pipes 15 extend out of the bottom formwork 3 and are fixed on the bottom formwork 3 through fixing rings 17. When concrete is poured, slurry overflows from the detection pipe, and the vault pouring is compact. And sealing rubber 19 is arranged at the positions where the vertical grouting pipe I13, the vertical exhaust pipe I14 and the detection pipe 15 extend out of the bottom template 3. And a port plugging body 20 is arranged at the joint of the secondary lining 2 of the previous section and the next section.
The invention also provides a construction method of the secondary lining vault anti-disengaging device, which comprises the following specific steps: s1, applying a primary lining 1, wherein the primary lining adopts sprayed concrete and has the thickness of 15 cm;
s2, manufacturing a first horizontal grouting pipe 71, a first horizontal exhaust pipe 81, a second horizontal grouting pipe 72 and a second horizontal exhaust pipe 82 by using steel pipes, wherein the diameter of each steel pipe is 32mm, drilling grouting holes or exhaust holes on a pipe body, the diameter of each grouting hole or exhaust hole is 3mm, and wrapping the pipe body by using filter cloth;
s3, installing the upper-layer steel bar mesh 6, welding a support frame 11 and a positioning sleeve 16 on the upper-layer steel bar mesh 6, placing a first horizontal grouting pipe 71 and a first horizontal exhaust pipe 81 on the support frame 11, wherein the first horizontal grouting pipe 71 and the first horizontal exhaust pipe 81 are parallel and horizontally placed, and the distance between the first horizontal grouting pipe 71 and the first horizontal exhaust pipe 81 is larger than the diameter of the detection pipe;
s4, installing a lower layer reinforcing mesh 5 and a welding positioning sleeve 16, installing a bottom template 3 and an end template 4 of the secondary lining 2, and forming holes in the positions corresponding to a vertical grouting pipe I13, a vertical exhaust pipe I14 and a detection pipe 15 on the bottom template 3 and the end template 4;
s5, penetrating the detection pipe 15 into a positioning sleeve 16 from the bottom template 3 upwards until the surface of the primary lining 1 is lined, then moving the detection pipe 15 downwards for 1-2cm, fixing the detection pipe 15 on the bottom template 3 by using a fixing ring 17 and sealing by using sealing rubber 19;
s6, pouring secondary lining 2 concrete of the first section gradually in sequence from two sides to the middle, wherein the thickness of the secondary lining concrete is 50cm, continuously injecting the concrete until slurry flows out of the detection pipe 15, removing the detection pipe 15, filling a gap of the detection pipe 15, and sealing the opening of the bottom template 3 at the position;
s7, removing the template after the solidification of the secondary lining 2 reaches the template removal strength, generating a void space 9 at the top after the solidification of the secondary lining 2, chiseling a small amount of loose concrete at the positions of a horizontal grouting pipe I71 and a horizontal exhaust pipe I81 at the end of the secondary lining 2, and injecting cement mortar to form a port plugging body 20;
s8, connecting a first horizontal grouting pipe 71 with a first vertical grouting pipe 13 through an elbow joint 12, and connecting a first horizontal exhaust pipe 81 with a first vertical exhaust pipe 14 through the elbow joint 12;
s9, processing an upper-layer steel bar mesh 6 of the second section of the secondary lining 2, welding a support frame 11 and a positioning sleeve 16 on the upper-layer steel bar mesh 6, and placing a second horizontal grouting pipe 72 and a horizontal exhaust pipe 82 on the support frame 11;
s10, processing and installing a lower layer reinforcing mesh 5 and a positioning sleeve 16 of the second section of secondary lining 2, installing a bottom formwork 3 and an end formwork 4 of the second section of secondary lining 2, and opening holes in positions corresponding to a vertical grouting pipe I13, a vertical exhaust pipe I14 and a detection pipe 15 on the bottom formwork 3 and the end formwork 4;
s11, penetrating a detection pipe 15 from the bottom template 3 of the second section of the secondary lining 2 upwards into a positioning sleeve 16 until the surface of the primary lining 1, then moving the detection pipe 15 downwards for 1-2cm, fixing the detection pipe 15 on the bottom template 3 by using a fixing ring 17 and sealing by using sealing rubber 19;
s12, connecting a first horizontal grouting pipe 71 with a compression pump to introduce compressed air into a void space 9 of the first section of the secondary lining 2, enabling the compressed air to overflow from a grouting hole at a high speed and break away filter cloth wrapped on a pipe body, and enabling the compressed air to enter a first horizontal exhaust pipe 81 from an exhaust hole of the first horizontal exhaust pipe 81 and to be exhausted out of the secondary lining 2;
s13, connecting a first horizontal exhaust pipe 81 with a compression pump to introduce compressed air into a void space 9 of the secondary lining 2 in the first stage, enabling the compressed air to overflow from an exhaust hole at a high speed and break away filter cloth wrapped on a pipe body, and enabling the compressed air to enter a first horizontal grouting pipe 71 from a grouting hole of the first horizontal grouting pipe 71 and to be discharged out of the secondary lining 2;
s14, pouring second-section secondary lining 2 concrete until the slurry overflows from the detection pipe 15;
s15, connecting a first vertical grouting pipe 13 with a grouting pump while pouring second-section secondary lining 2 concrete, injecting micro-expansion cement slurry into a void 9 of the first-stage secondary lining 2 through a first horizontal grouting pipe 71, and discharging air in the void 9 from a first horizontal exhaust pipe 81 and a first vertical exhaust pipe 14;
s16, connecting the first vertical exhaust pipe 14 with a grouting pump, and injecting micro-expansion cement slurry into the first horizontal exhaust pipe 81 to complete grouting of the void space 9;
s17, after the second section of secondary lining 2 concrete is solidified and meets the formwork removal requirement, repeating the steps S7-S16, and carrying out construction on the next section.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are within the spirit of the invention and the scope of the appended claims.
Claims (9)
1. The utility model provides a secondary lining vault anti-disengaging device which characterized in that: a secondary lining (2) is arranged below the primary lining (1), a lower layer steel bar net (5) and an upper layer steel bar net (6) are arranged in the secondary lining (2), a bottom template (3) is arranged below the next section of secondary lining and is in lap joint with the previous section of secondary lining, an end template (4) is arranged in front of the next section of secondary lining, a horizontal grouting pipe I (71) and a horizontal exhaust pipe I (81) are arranged below the primary lining (1), the horizontal grouting pipe I (71) and the horizontal exhaust pipe I (81) are arranged on a support frame (11) in parallel and horizontally, the support frame (11) is fixed on the upper layer steel bar net (6), small holes are filled on the whole body of the horizontal grouting pipe I (71) and the horizontal exhaust pipe I (81) and are wrapped with filter cloth, the horizontal grouting pipe I (71) is connected with a vertical grouting pipe I (13) through a bent pipe joint (12), and the horizontal exhaust pipe I (81) is connected with a vertical exhaust pipe I (14) through a bent pipe joint (12), 3-6 detection pipes (15) are arranged along the central axis of each section of secondary lining (2), the tops of the detection pipes (15) are lower than the surface of the primary lining (1) by 1-2cm, the detection pipes (15) penetrate through positioning sleeves (16) fixed on the upper layer reinforcing mesh (6) and the lower layer reinforcing mesh (5), and the bottoms of the detection pipes (15) extend out of the bottom formwork (3) and are fixed on the bottom formwork (3) through fixing rings (17).
2. The secondary lining dome de-emption device of claim 1, characterized in that: the first vertical grouting pipe (13) and the first vertical exhaust pipe (14) extend out of the bottom template (3).
3. The secondary lining dome de-emption device of claim 1, characterized in that: a second horizontal grouting pipe (72) and a second horizontal exhaust pipe (82) are vertically arranged on the support frame (11) and the detection pipe (15), the second horizontal grouting pipe (72) and the second horizontal exhaust pipe (82) are arranged in parallel, and the pipe body structure is the same as that of the first horizontal grouting pipe (71) and the first horizontal exhaust pipe (81).
4. The secondary lining dome de-emption device of claim 2, characterized in that: and sealing rubber (19) is arranged at the positions where the vertical grouting pipe I (13), the vertical exhaust pipe I (14) and the detection pipe (15) extend out of the bottom template (3).
5. The secondary lining dome de-emption device of claim 1, characterized in that: a port plugging body (20) is arranged at the joint of the upper section of the secondary lining (2) and the lower section.
6. The secondary lining dome de-emption device of claim 1, characterized in that: the bottom template (3) of the next section and the secondary lining (2) of the previous section have certain lap joint length.
7. The secondary lining dome de-emption device of claim 1, characterized in that: the supporting frames (11) are uniformly arranged along the grouting pipe and the exhaust pipe, are formed by welding steel bars and are welded on the upper layer of the steel bar mesh (6).
8. The secondary lining dome de-emption device of claim 1, characterized in that: the detection tube (15) is made of a hard plastic tube.
9. A construction method of the secondary lining vault anti-disengaging device based on claim 1 is characterized in that: the method comprises the following steps:
s1, constructing a primary lining (1);
s2, manufacturing a first horizontal grouting pipe (71), a first horizontal exhaust pipe (81), a second horizontal grouting pipe (72) and a second horizontal exhaust pipe (82) by adopting steel pipes, drilling grouting holes or exhaust holes on a pipe body, and wrapping the pipe body by using filter cloth;
s3, installing an upper-layer reinforcing mesh (6), fixing a support frame (11) and a positioning sleeve (16) on the upper-layer reinforcing mesh (6), and placing a first horizontal grouting pipe (71) and a first horizontal exhaust pipe (81) on the support frame (11);
s4, installing a lower layer reinforcing mesh (5) and a fixed positioning sleeve (16), installing a bottom template (3) and an end template (4) of the secondary lining (2), and perforating corresponding positions of a first vertical grouting pipe (13), a first vertical exhaust pipe (14) and a detection pipe (15) on the bottom template (3) and the end template (4);
s5, penetrating the detection pipe (15) from the bottom template (3) upwards into a positioning sleeve (16) until the surface of the primary lining (1), then moving the detection pipe (15) downwards for 1-2cm, fixing the detection pipe (15) on the bottom template (3) by using a fixing ring (17) and sealing by using sealing rubber (19);
s6, pouring the concrete of the secondary lining (2) of the first section step by step in the sequence of firstly pouring the concrete from two sides to the middle, continuously injecting the concrete until slurry flows out of the detection pipe (15), removing the detection pipe (15), filling the gap of the detection pipe (15), and sealing the opening of the bottom template (3) at the position;
s7, removing the template after the secondary lining (2) is solidified to achieve the template removal strength, generating a void space (9) at the top after the secondary lining (2) is solidified, chiseling loose concrete at the positions of a horizontal grouting pipe I (71) and a horizontal exhaust pipe I (81) at the end of the secondary lining (2), and injecting cement mortar to form a port plugging body (20);
s8, connecting a first horizontal grouting pipe (71) with a first vertical grouting pipe (13) through an elbow joint (12), and connecting a first horizontal exhaust pipe (81) with a first vertical exhaust pipe (14) through the elbow joint (12);
s9, processing an upper layer reinforcing mesh (6) of the second section of the secondary lining (2), fixing a support frame (11) and a positioning sleeve (16) on the upper layer reinforcing mesh (6), and placing a horizontal grouting pipe II (72) and a horizontal exhaust pipe (82) on the support frame (11);
s10, processing and installing a lower layer reinforcing mesh (5) and a positioning sleeve (16) of the second section of secondary lining (2), installing a bottom template (3) and an end template (4) of the second section of secondary lining (2), and perforating corresponding positions of a first vertical grouting pipe (13), a first vertical exhaust pipe (14) and a detection pipe (15) on the bottom template (3) and the end template (4);
s11, penetrating a detection pipe (15) from a bottom template (3) of a second section of secondary lining (2) upwards into a positioning sleeve (16) until the surface of a primary lining (1), then moving the detection pipe (15) downwards by 1-2cm, fixing the detection pipe (15) on the bottom template (3) by using a fixing ring (17) and sealing by using sealing rubber (19);
s12, connecting a first horizontal grouting pipe (71) with a compression pump to introduce compressed air into a void (9) of the first section of the secondary lining (2), enabling the compressed air to overflow from a grouting hole at a high speed and break away filter cloth wrapped on a pipe body, and enabling the compressed air to enter a first horizontal exhaust pipe (81) from an exhaust hole of the first horizontal exhaust pipe (81) and be exhausted out of the secondary lining (2);
s13, connecting a horizontal exhaust pipe I (81) with a compression pump to introduce compressed air into a void space (9) of the secondary lining (2) in the first stage, enabling the compressed air to overflow from an exhaust hole at a high speed and break away filter cloth wrapped on a pipe body, enabling the compressed air to enter a horizontal grouting pipe I (71) from a grouting hole of the horizontal grouting pipe I (71) and discharge the compressed air out of the secondary lining (2);
s14, pouring second-section secondary lining (2) concrete until the slurry overflows from the detection pipe (15);
s15, connecting a first vertical grouting pipe (13) with a grouting pump while pouring concrete of a second section of secondary lining (2), injecting cement slurry into a void (9) of the first-stage secondary lining (2) through a first horizontal grouting pipe (71), and discharging air in the void (9) from a first horizontal exhaust pipe (81) and a first vertical exhaust pipe (14);
s16, connecting the first vertical exhaust pipe (14) with a grouting pump, and injecting cement slurry into the first horizontal exhaust pipe (81) to finish grouting of the void (9);
s17, after the concrete of the second section of the secondary lining (2) is solidified and meets the requirement of form removal, repeating the steps S7-S16 and carrying out construction of the next section.
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