CN113982649A - Tunnel lining back reserved radial grouting device and system - Google Patents
Tunnel lining back reserved radial grouting device and system Download PDFInfo
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- CN113982649A CN113982649A CN202111324041.2A CN202111324041A CN113982649A CN 113982649 A CN113982649 A CN 113982649A CN 202111324041 A CN202111324041 A CN 202111324041A CN 113982649 A CN113982649 A CN 113982649A
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- 239000011440 grout Substances 0.000 claims abstract description 47
- 239000011800 void material Substances 0.000 claims abstract description 24
- 238000007569 slipcasting Methods 0.000 claims description 29
- 239000011435 rock Substances 0.000 claims description 21
- 238000009412 basement excavation Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 241001484259 Lacuna Species 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 210000003437 trachea Anatomy 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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- 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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- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- 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 belongs to the technical field of tunnel engineering, and particularly relates to a device and a system for reserving radial grouting behind a tunnel lining, which comprise grouting branch pipes, built-in valves, hollow rotating rods and grouting hole pipes; one end of the grouting hole pipe is a grouting opening, and the other end of the grouting hole pipe is a grout outlet used for grouting to the air leakage gap of the tunnel; the side wall of the grouting hole pipe close to the grout outlet end is also provided with a plurality of grout outlet holes, and the grout outlet holes are connected with grouting branch pipes for grouting to the void gap of the tunnel; the hollow rotating rod is arranged in the grouting hole pipe, the exhaust inlet is positioned at the grout outlet, and the exhaust outlet is positioned at the grouting port; at least one built-in valve capable of closing or opening the grouting hole pipe is arranged in the grouting hole pipe, and the built-in valve is installed on the hollow rotating rod and is positioned between the grout outlet and the grout outlet. The invention can quickly eliminate the leakage or the void of the back or the inverted arch of the lining in the post-construction and later-stage application of the tunnel, and obviously reduce the maintenance cost in the construction and operation stages of the tunnel, thereby improving the construction quality of the tunnel and finally reducing the engineering investment.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering, and particularly relates to a reserved radial grouting device and system at the back of a tunnel lining, which are suitable for the back hollow leakage, the hollow clearance and the surrounding rock repair of tunnels and underground engineering linings, and particularly can be used in the fields of highways, railways, municipal works, rail traffic, water delivery tunnels and the like.
Background
The tunnel lining structure in the prior art generally comprises a primary support, a waterproof layer and a lining which are sequentially constructed on a surrounding rock excavation surface. A cavity is easy to appear between the primary support and the waterproof layer, and a gap is formed; gaps may occur between the lining and the waterproof layer to form void gaps, and particularly, cavities are easy to occur at the vault. The incompact structure greatly influences the whole stress strength of the tunnel lining structure, and quality and potential safety hazards can be caused if the whole stress strength is not processed in time. Therefore, hole pipes for detecting grouting are reserved in the tunnel lining structure in the tunnel design, and the aim is to eliminate the void gaps and the leakage gaps by detecting grouting through the grouting hole pipes after the tunnel lining is poured or installed, and to re-solidify loose surrounding rocks.
At present, grouting hole pipes applied by the underground engineering field are relatively simple in arrangement, the hole pipes are applied and constructed roughly, surrounding rock grouting after tunnel construction often causes the integrity of a waterproof board to be damaged, underground water is mixed, the treatment cost is relatively high, and the final treatment effect is poor.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a device and a system for reserving radial grouting behind a tunnel lining, which can timely, scientifically and reasonably control the conditions of leakage, void and surrounding rock body loosening behind the lining, reduce the maintenance cost of the tunnel and improve the construction quality of the tunnel.
In order to achieve the purpose, the technical scheme of the invention is that a radial grouting device is reserved at the back of a tunnel lining, and the device comprises grouting branch pipes, a built-in valve, a hollow rotating rod for exhausting and grouting hole pipes for radially grouting the back of the lining of the tunnel; one end of the grouting hole pipe is a grouting opening, and the other end of the grouting hole pipe is a grout outlet used for grouting to the air leakage gap of the tunnel; the side wall of the grouting hole pipe close to the grout outlet end is also provided with a plurality of grout outlet holes, and the grout outlet holes are connected with grouting branch pipes for grouting to a void gap of the tunnel; the hollow rotating rod is arranged in the grouting hole pipe along the axis of the grouting hole pipe, the exhaust inlet of the hollow rotating rod is positioned at the grout outlet and slightly exposed out of the grout outlet, and the exhaust outlet is positioned at the grouting port; at least one built-in valve capable of closing or opening the grouting hole pipe is arranged in the grouting hole pipe, and the built-in valve is installed on the hollow rotating rod and is positioned between the grout outlet and the grout outlet.
Furthermore, the built-in valve comprises a built-in valve large blade and a built-in valve small blade which are vertically attached; the circle center of the large blade of the built-in valve is provided with a shaft hole and sleeved on the hollow rotating rod, and the arc ring of the large blade of the built-in valve is fixedly connected with the inner wall of the grouting hole pipe; the circle center of the small blade of the built-in valve is fixedly connected with the hollow rotating rod; the sum of the area of the small built-in valve blade and the area of the large built-in valve blade is larger than the inner circle area of the grouting hole pipe; the hollow rotating rod is arranged in the grouting hole pipe and can rotate relative to the grouting hole pipe.
Furthermore, an exhaust outlet of the hollow rotating rod is fixedly connected with a hollow handle, an exhaust air passage outlet is arranged on the side wall of the grouting opening end of the grouting hole pipe corresponding to the position where the built-in valve is completely opened, and the hollow handle is connected with a detachable extension air pipe through the exhaust air passage outlet.
Furthermore, the exhaust inlet of the hollow rotating rod and the slurry outlet of the grouting branch pipe are sleeved with elastic ferrule.
Furthermore, the slip casting mouth end of slip casting pore pipe is provided with bowl shape mounting, be equipped with the through-hole at the bowl end of bowl shape mounting, the slip casting pore pipe runs through the through-hole and with bowl end fixed connection, the peripheral bowl eaves in bowl top of bowl shape mounting establishes the detachable connection with the template of tunnel pouring lining cutting.
Furthermore, a filling material is filled between the inner wall of the bowl-shaped fixing piece and the outer wall of the grouting hole pipe.
Furthermore, a sealing element is arranged on the outer wall of the grouting hole pipe at a position corresponding to the waterproof layer.
Furthermore, the sealing element comprises a small fixed washer, a large first movable washer, a large second movable washer and a locking nut which are sequentially sleeved on the grouting hole pipe from the grout outlet to the grouting port; the small fixed washer is fixed with the grouting hole pipe, and the first movable large washer and the second movable large washer are respectively used for being arranged in a void leakage gap and a void clearance on two sides of the waterproof layer and are locked through the locking nut.
Further, the grouting hole pipe and the hollow rotating rod are fixed pipe fittings or telescopic pipe fittings.
The invention also provides a tunnel lining back reserved radial grouting system, which comprises a tunnel lining structure and the grouting device; the grouting device is arranged at the vault of the tunnel lining structure; when the surrounding rock mass is loose, additionally arranging the grouting devices at the inverted arch and arch springs at two sides of the tunnel lining structure; the slip casting hole pipe runs through perpendicularly lining and the waterproof layer of tunnel lining structure, the grout outlet of slip casting hole pipe is located the gap that leaks and just is close to the country rock excavation face, the grout outlet of slip casting branch pipe is located the gap that comes to the air and just is close to the waterproof layer.
Compared with the prior art, the invention has the following beneficial effects:
by adopting the grouting device in the tunnel lining structure, the occurrence of void leakage or void behind the lining or at the bottom of the inverted arch in the application after tunnel construction and later period can be quickly eliminated, the influence of underground water development on the lining is inhibited, the maintenance cost in the tunnel construction and operation stage is obviously reduced, the tunnel construction quality is effectively improved, and the grouting device makes a breakthrough in the aspects of continuous protection of surrounding rocks of underground engineering, full-life management of the lining structure, control of underground water damage and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a reserved radial grouting system at the back of a tunnel lining according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a device for reserving radial grouting behind a tunnel lining according to an embodiment of the present invention;
in the figure: 1. grouting a hole pipe; 2. a large valve blade is arranged inside; 3. a small valve blade is arranged inside; 4. a hollow rotating rod; 5. a hollow handle; 6. lengthening a trachea; 7. grouting branch pipes; 8. elastic wrapping heads; 9. a mechanical waterproof cover; 10. fixing a small washer; 11. a first movable large washer; 12. a second movable large washer; 13. locking the nut; 14. a retractable position; 15. a bowl-shaped fixing member; 16. a small buckle bolt; 17. a filler material; 18. a template; 19. an earth formation; 20. excavating a surrounding rock surface; 21. primary support; 22. a leaky empty gap; 23. a waterproof layer; 24. a void space; 25. lining; 26. clearing; 27. filling an inverted arch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 2, the embodiment provides a device for reserving radial grouting behind a tunnel lining, which comprises a grouting branch pipe 7, a built-in valve, a hollow rotating rod 4 for exhausting, and a grouting hole pipe 1 for radially grouting behind a lining 25 of a tunnel; one end of the grouting hole pipe 1 is a grouting opening, and the other end of the grouting hole pipe 1 is a grout outlet used for grouting the air leakage gap 22 of the tunnel; the side wall of the grouting hole pipe 1 close to the grout outlet end is also provided with a plurality of grout outlet holes, and the grout outlet holes are connected with grouting branch pipes 7 for grouting a void gap 24 of the tunnel; the hollow rotating rod 4 is arranged in the grouting hole pipe 1 along the axis of the grouting hole pipe 1, the exhaust inlet of the hollow rotating rod 4 is positioned at the grout outlet and slightly exposed out of the grout outlet, and the exhaust outlet is positioned at the grouting port; at least one built-in valve capable of closing or opening the grouting hole pipe 1 is arranged in the grouting hole pipe 1, and the built-in valve is installed on the hollow rotating rod 4 and is located between the grout outlet and the grout outlet. In the embodiment, at least one mechanically opened and closed built-in valve is arranged in the pipe between the grout outlet and the grout outlet of the grouting hole pipe 1; the installation is started, and the built-in valve is closed; through inspection, if the void gap 24 and the air leakage gap 22 exist, thick cement mortar with low grouting pressure is firstly used for grouting and filling the void gap 24 in the waterproof layer 23 to solve the situation of the void gap 24 behind the lining 25, then a built-in valve is opened, and slightly dilute cement mortar is injected into the air leakage gap 22 outside the waterproof layer 23 by adopting higher pressure to solve the problem of the air leakage gap 22 outside the waterproof layer, and if surrounding rocks are broken, the pressure is adjusted to be higher in the later period to solve the situation of the looseness of the surrounding rock mass; if the void space 24 is basically not available and the leakage space 22 exists, opening the built-in valve to inject grout into the leakage space 22; adopt the slip casting device of this embodiment in tunnel lining structure, can eliminate behind the tunnel worker and the later stage application lining 25 back or inverted arch bottom appearance hourglass sky or take off the sky fast, restrain the influence of groundwater development to lining 25, obviously reduce the maintenance cost in tunnel construction and operation stage, promote tunnel construction quality effectively.
Optimize above-mentioned embodiment, set up on the lateral wall of slip casting hole pipe 1 within waterproof layer 23 and arrange 1~2 rings of grout outlet, ring clear distance 15~30mm, 3~4 slip casting holes of every ring equidistance, the slip casting hole diameter is 5~15mm, every grout outlet all is connected with corresponding stereoplasm slip casting branch pipe 7 outward to solve the evacuation clearance 24 problem behind the lining cutting 25, need close the built-in valve in the slip casting hole pipe 1 when adopting slip casting branch pipe 7 slip casting.
Further, the built-in valve comprises a built-in valve large blade 2 and a built-in valve small blade 3 which are attached up and down; the circle center of the large blade 2 of the built-in valve is provided with a shaft hole and sleeved on the hollow rotating rod 4, and the arc ring of the large blade 2 of the built-in valve is fixedly connected with the inner wall of the grouting hole pipe 1; the circle center of the small blade 3 of the built-in valve is fixedly connected with the hollow rotating rod 4; the sum of the area of the small built-in valve blade 3 and the area of the large built-in valve blade 2 is larger than the inner circular area of the grouting hole pipe 1; the hollow rotating rod 4 is rotatably arranged in the grouting hole pipe 1. The built-in valve large blade 2 and the built-in valve small blade 3 are arranged in a vertically attached mode, the built-in valve large blade 2 is fixedly welded to the inner wall of the grouting hole pipe 1 and is kept stationary, the built-in valve small blade 3 is fixedly connected with the rotatable hollow rotating rod 4, the built-in valve small blade 3 is driven to rotate by rotating the hollow rotating rod 4, and the closing and opening of a grouting channel on the built-in valve can be adjusted; when the grouting channel on the built-in valve is closed, grouting can be performed to the void gap 24 through the grouting hole pipe 1 and the grouting branch pipe 7; when the grouting channel on the built-in valve is opened, grouting can be performed to the leakage gap 22 through the grouting hole pipe 1.
Optimize above-mentioned embodiment, set up two built-in valves in slip casting hole pipe 1, two built-in valves all are close to waterproof layer 23 and set up, and one of them sets up in the waterproof layer 23 outside, and another sets up in the waterproof layer 23 inboard.
The embodiment is optimized, the area of the large blade 2 of the built-in valve is slightly larger than the semicircular area of the section of the grouting hole pipe 1, and the area of the small blade 3 of the built-in valve is equal to or slightly larger than the semicircular area of the section of the grouting hole pipe 1.
Furthermore, an exhaust outlet of the hollow rotating rod 4 is fixedly connected with a hollow handle 5, an exhaust air passage outlet is arranged on the side wall of the grouting opening end of the grouting hole pipe 1 corresponding to the position of the hollow handle 5 with the built-in valve completely opened, and the hollow handle 5 is connected with a detachable elongated air pipe 6 through the exhaust air passage outlet. In the embodiment, the hollow rotating rod 4, the hollow handle 5 and the built-in valve small blade 3 are fixedly welded together, a circular groove is arranged on the inner wall of the grouting hole pipe 1 corresponding to the rotating path of the built-in valve small blade 3, the circular groove is a rotating chute channel of the built-in valve small blade 3, and the built-in valve is closed and opened by rotating the hollow handle 5 to drive the hollow rotating rod 4 to rotate in the grouting hole pipe 1, so that the built-in valve small blade 3 fixedly connected to the hollow rotating rod 4 is driven to rotate along the circular chute; in the process, the hollow rotating rod 4 can only rotate in the grouting hole pipe 1 and cannot translate along the axial direction.
Furthermore, the air exhaust inlet of the hollow rotating rod 4 and the slurry outlet of the grouting branch pipe 7 are sleeved with elastic ferrule 8. The elastic ferrule 8 of the embodiment is made of rubber and has a small ferrule structure, and the elastic ferrule 8 is sleeved at the exhaust inlet of the hollow rotating rod 4 and the grout outlets of the plurality of grouting branch pipes 7; when grouting is carried out in the waterproof layer 23, the elastic ferrule 8 on the grouting branch pipe 7 is jacked open under the action of grouting pressure, the grout outlet of the grouting branch pipe 7 is opened, and grouting is carried out to the void gap 24; when the air needs to be exhausted, the detachable elongated air pipe at the end of the air outlet of the hollow rotating rod 4 blows air inwards to push the elastic ferrule 8 on the air exhaust inlet of the hollow rotating rod 4 open.
Optimize above-mentioned embodiment, the slip casting mouth of slip casting hole pipe 1 is sealed through mechanical waterproof closing cap 9, and the outer wall contact part of mechanical waterproof closing cap 9 and slip casting hole pipe 1 adopts inside and outside screw thread detachable connection.
Further, the slip casting mouth end of slip casting hole pipe 1 is provided with bowl shape mounting 15, be equipped with the through-hole at the bottom of the bowl of bowl shape mounting 15, slip casting hole pipe 1 runs through the through-hole and with bowl end fixed connection, the peripheral bowl eaves in bowl top of bowl shape mounting 15 establishes the detachable connection with the template of tunnel pouring lining cutting. Further, a filling material 17 is filled between the inner wall of the bowl-shaped fixing member 15 and the outer wall of the grouting hole pipe 1. In the embodiment, before construction, buckling small bolt holes are designed at the positions of the bowl eaves of the bowl-shaped fixing piece 15 and the corresponding bowl eaves of the template 18, the hole positions are triangular or square, 3 or 4 buckling small bolts 16 are adopted to lock the bowl-shaped fixing piece 15, then the grouting end of the grouting hole pipe 1 is inserted into the bowl-shaped fixing piece 15 through a bowl bottom through hole, the positioning contact parts of the two are fixed by strong glue, and the inner wall of the bowl-shaped fixing piece 15 and the outer wall of the grouting hole pipe 1 are plugged by a detachable filling material 17; wherein, the filling material 17 can adopt a special foaming agent, and can also adopt concrete. The lining 25 can adopt a cast-in-place concrete type lining or a segment split mounting type lining; when the cast-in-place concrete type lining is adopted, after the maintenance of the lining 25 is finished, the screw caps of 3 or 4 small buckle bolts 16 on the outer surface of the template 18 are loosened, the template 18 can be moved away, and the grouting hole pipe 1 is left in the lining structure; when adopting section of jurisdiction pin-connected panel lining cutting, the installation space of slip casting device is left to the corresponding section of jurisdiction position of batch production, puts into the slip casting device during field erection, and the two location contact position adopts sticky material fixed.
Furthermore, a sealing element is arranged on the outer wall of the grouting hole pipe 1 corresponding to the position of the waterproof layer 23 passing through the gap 22 and the gap 24, and the contact position of the outer wall of the grouting hole pipe 1 and the hole of the waterproof layer 23 is sealed through the sealing element. Furthermore, the sealing element comprises a small fixed washer 10, a large first movable washer 11, a large second movable washer 12 and a locking nut 13 which are sequentially sleeved on the grouting hole pipe 1 from the grout outlet to the grouting port; the fixed small washer 10 is fixedly connected with the grouting hole pipe 1, the first movable large washer 11 and the second movable large washer 12 are respectively used for arranging a leakage gap 22 and a release gap 24 on two sides of a waterproof layer 23, and when the grouting hole pipe is used, the first movable large washer 11 and the second movable large washer 12 are respectively tightly attached to two sides of the waterproof layer 23 and are locked by the locking nut 13, so that the position, through which the grouting hole pipe 1 on the waterproof layer 23 passes, of the waterproof layer is sealed and watertight.
Further, the grouting hole pipe 1 and the hollow rotating rod 4 are fixed pipe fittings or telescopic pipe fittings. In the embodiment, the pipe body of the grouting hole pipe 1 and the rod body of the hollow rotating rod 4 can both have a telescopic function, so that the grouting hole pipe is suitable for lining structures with different positions and different thicknesses of a tunnel lining structure, and the application range of the grouting device is expanded; the telescopic function of the grouting hole pipe 1 and the hollow rotating rod 4 can be realized in a sleeve form, and the telescopic position 14 can be arranged in the middle of the pipe body of the grouting hole pipe 1.
As shown in fig. 1, the embodiment further provides a tunnel lining back reserved radial grouting system, which includes a tunnel lining structure and the grouting device; the grouting device is arranged at the vault of the tunnel lining structure; when the surrounding rock mass is loose, arranging the grouting devices at the inverted arch and the arch springs at the two sides of the tunnel lining structure; the tunnel lining structure comprises a primary support 21, a waterproof layer 23 and a lining 25 which are sequentially constructed on a surrounding rock excavation surface 20; a gap 22 is reserved between the primary support 21 and the waterproof layer 23, and a gap 24 is reserved between the lining 25 and the waterproof layer 23; grouting hole pipe 1 arranges between the surface of lining 25 and country rock excavation face 20, and runs through lining 25 and waterproof layer 23 perpendicularly, just grouting hole pipe 1's grout outlet is located the lacuna clearance 22 and is close to country rock excavation face 20 or preliminary bracing 21, grouting branch pipe 7's grout outlet is located the lacuna clearance 24 and is close to waterproof layer 23. The pre-buried slip casting device in tunnel lining structure construction of this embodiment mainly has following effect: 1) the lining quality self-checking device provides help for manually knowing lining environment and quality conditions in real time, real-time and real knowledge is provided for whether the lining back has a gap or a void and underground water development conditions, the problem can be found in time in the self-checking process of lining quality three-check, the defect problem is processed by using a reserved grouting device, and the quality problem is reduced or eliminated; 2) the method is characterized in that the collapse influence in the arch top lining concrete pouring process, the contraction creep naturally occurring in the concrete curing process and the like exist, the back of the arch top lining can be in different degrees, the tunnel lining meets the curing condition, the lining thickness meets the design requirement, and the grouting device reserved in the arch top position can be used for grouting the arch top void range on the inner side of the waterproof plate to eliminate void space; 3) the nondestructive testing results before the tunnel is accepted at the present stage are that the tunnel arch springing to the wall waist can have a leak, and the grouting device reserved at the arch springing positions at the two sides of the tunnel is used for performing supplementary grouting on the leak between the back of the waterproof board and the primary support of the surrounding rock and the loose part of the surrounding rock body at the periphery, so that the purposes of eliminating the cavity and consolidating the surrounding rock are achieved; 4) a grouting device is reserved at the 27 filling positions of the inverted arch of the tunnel, so that quality improvement can be performed on dynamic adverse change conditions such as slurry turning and mud pumping in the later operation of the tunnel. And (4) reserving and protecting the grouting device which is not used before acceptance inspection, and starting the grouting device when problems are generated by later-stage surrounding rock dynamic changes and need to be dealt with.
Carrying out investment analysis by using a tunnel section with the longitudinal length of 6m, wherein the excavation width of 10-14 m or less can be reserved according to a hole pipe at each of the upper part, the lower part, the left part and the right part, and the hole pipes are arranged at four positions; the excavation width is 15-24 m, and the excavation width can be reserved according to two hole pipes at the upper part, the left part, the right part and the lower part, and the excavation width is seven; the production cost of one hole pipe is 250 yuan, the construction cost of a tunnel with the length of 6m and the width of 12m is estimated by 24 ten thousand yuan, the reserved hole pipe device only accounts for about 5 per thousand of the civil construction and installation cost of the tunnel, and the defect or disease problem can be timely treated after construction.
The grouting device of the embodiment can also be popularized and applied to grouting and other aspects related to other civil engineering construction fields.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a tunnel lining reserves radial slip casting device behind one's back which characterized in that: the grouting branch pipe is connected with the built-in valve through a pipeline; one end of the grouting hole pipe is a grouting opening, and the other end of the grouting hole pipe is a grout outlet used for grouting to the air leakage gap of the tunnel; the side wall of the grouting hole pipe close to the grout outlet end is also provided with a plurality of grout outlet holes, and the grout outlet holes are connected with grouting branch pipes for grouting to a void gap of the tunnel; the hollow rotating rod is arranged in the grouting hole pipe along the axis of the grouting hole pipe, the exhaust inlet of the hollow rotating rod is positioned at the grout outlet and slightly exposed out of the grout outlet, and the exhaust outlet is positioned at the grouting port; at least one built-in valve capable of closing or opening the grouting hole pipe is arranged in the grouting hole pipe, and the built-in valve is installed on the hollow rotating rod and is positioned between the grout outlet and the grout outlet.
2. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 1, characterized in that: the built-in valve comprises a built-in valve large blade and a built-in valve small blade which are vertically attached; the circle center of the large blade of the built-in valve is provided with a shaft hole and sleeved on the hollow rotating rod, and the arc ring of the large blade of the built-in valve is fixedly connected with the inner wall of the grouting hole pipe; the circle center of the small blade of the built-in valve is fixedly connected with the hollow rotating rod; the sum of the area of the small built-in valve blade and the area of the large built-in valve blade is larger than the inner circle area of the grouting hole pipe; the hollow rotating rod is arranged in the grouting hole pipe and can rotate relative to the grouting hole pipe.
3. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 2, characterized in that: the exhaust outlet of the hollow rotating rod is fixedly connected with the hollow handle, an exhaust air passage outlet is arranged on the side wall of the grouting opening end of the grouting hole pipe corresponding to the position where the built-in valve is completely opened, and the hollow handle is connected with the detachable elongated air pipe through the exhaust air passage outlet.
4. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 1, characterized in that: and the exhaust inlet of the hollow rotating rod and the slurry outlet of the grouting branch pipe are sleeved with elastic ferrule.
5. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 1, characterized in that: the grouting hole pipe is characterized in that a bowl-shaped fixing piece is arranged at the grouting opening end of the grouting hole pipe, a through hole is formed in the bowl bottom of the bowl-shaped fixing piece, the grouting hole pipe penetrates through the through hole and is fixedly connected with the bowl bottom, and the bowl top peripheral bowl eaves of the bowl-shaped fixing piece are detachably connected with the tunnel pouring lining template.
6. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 5, wherein: and a filling material is filled between the inner wall of the bowl-shaped fixing piece and the outer wall of the grouting hole pipe.
7. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 1, characterized in that: and a sealing element is arranged on the outer wall of the grouting hole pipe at a position corresponding to the waterproof layer.
8. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 7, wherein: the sealing element comprises a small fixed washer, a large first movable washer, a large second movable washer and a locking nut which are sequentially sleeved on the grouting hole pipe from the grout outlet to the grouting port; the small fixed washer is fixed with the grouting hole pipe, and the first movable large washer and the second movable large washer are respectively used for being arranged in a void leakage gap and a void clearance on two sides of the waterproof layer and are locked through the locking nut.
9. The device for grouting in the reserved radial direction behind the tunnel lining as claimed in claim 1, characterized in that: the grouting hole pipe and the hollow rotating rod are fixed pipe fittings or telescopic pipe fittings.
10. The utility model provides a tunnel lining reserves radial slip casting system behind one's back which characterized in that: comprising a tunnel lining structure and a grouting device according to any one of claims 1-9; the grouting device is arranged at the vault of the tunnel lining structure; when the surrounding rock mass is loose, additionally arranging the grouting devices at the inverted arch and arch springs at two sides of the tunnel lining structure; the slip casting hole pipe runs through perpendicularly lining and the waterproof layer of tunnel lining structure, the grout outlet of slip casting hole pipe is located the gap that leaks and just is close to the country rock excavation face, the grout outlet of slip casting branch pipe is located the gap that comes to the air and just is close to the waterproof layer.
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| CN202111324041.2A CN113982649B (en) | 2021-11-10 | 2021-11-10 | Radial grouting device and system reserved at back of tunnel lining |
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| CN115419438A (en) * | 2022-09-23 | 2022-12-02 | 湖北工业大学 | Lining trolley for pouring low-temperature concrete into high-ground-temperature tunnel and working method |
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| CN113982649B (en) | 2023-07-25 |
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