CN113310791A - Detection device and detection method for preventing tunnel waterproof board from being hollow behind - Google Patents
Detection device and detection method for preventing tunnel waterproof board from being hollow behind Download PDFInfo
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- CN113310791A CN113310791A CN202110383566.7A CN202110383566A CN113310791A CN 113310791 A CN113310791 A CN 113310791A CN 202110383566 A CN202110383566 A CN 202110383566A CN 113310791 A CN113310791 A CN 113310791A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
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Abstract
The invention discloses a detection device and a detection method for preventing a tunnel waterproof board from being hollow behind, wherein the waterproof board is arranged between a primary support and a secondary lining, the detection device comprises a detection feedback body and a signal receiver, the detection feedback body is fixed on the primary support and is connected with the signal receiver through a lead, and the signal receiver is arranged on a movable rack. The detection method comprises the following steps: step 1: before the waterproof board is hung, section detection is carried out, the positions of the primary shotcrete pits are marked one by one, and numbering is carried out; step 2: mounting the pressure strain gauge at the deepest part of each sunken pit, and horizontally burying a grouting pipe in each sunken pit along the axial direction of the tunnel; and step 3: in the process of hanging the waterproof board, pressing the waterproof board when each pit is reached, stopping when the signal indicator light is on, and performing secondary lining for concrete pouring; and 4, step 4: and observing the working condition of the signal indicator lamp corresponding to each pit in the process of pouring concrete.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering, and particularly relates to a detection device and a detection method for preventing a tunnel waterproof plate from being hollow behind.
Background
The tunnel secondary lining quality detection method has the advantages that the phenomenon of cavities behind the lining is often detected during tunnel secondary lining quality detection, the integrity and the stress state of the composite lining are affected, and on-site verification shows that the cavities on two sides of the side wall of the tunnel are basically behind the waterproof plate, which is caused by the fact that the waterproof plate is not closely attached to the primary support.
The tunnel arch cavity has three conditions, one is caused by that the concrete is not fully poured and is led to a cavity between the waterproof board and the secondary lining concrete, the other is caused by that the waterproof board is not tightly attached to the primary support, the third is that cavities exist among the secondary lining concrete, the waterproof board and the primary support, the cavities between the waterproof board and the primary support are mainly caused by poor looseness control of the waterproof board, the cavities between the lining and the waterproof board are mainly located in the arch and are caused by that the concrete is not fully poured, a grouting backfilling mode is usually adopted for treating the cavities and taking, but the waterproof board is required to be damaged when the cavities between the waterproof board and the primary support are subjected to grouting backfilling, secondary lining water leakage is often caused, and a detection method is provided for preventing the cavities behind the lining of the tunnel.
The method is characterized in that the looseness of the waterproof board is kept in the process of laying the waterproof board in the tunnel, the waterproof board is too loose and is easy to form wrinkles, and the sunken pit of the primary support of the tunnel cannot be filled with the waterproof board due to too tight waterproof board, so the integrity of the composite lining is influenced by the looseness of the waterproof board of the tunnel, and a detection device capable of detecting that the waterproof board just can fill the sunken pit of the primary support is needed. The method can detect the looseness of the tunnel waterproof board in time, and can save the later detection period and the later detection cost.
Disclosure of Invention
Aiming at the existing problems, the invention provides a detection device for predicting the back void of a tunnel waterproof board, which can replace the traditional mode mainly comprising the steps of destroying the waterproof board and grouting and backfilling, and can save the construction period and financial resources.
The technical scheme adopted by the invention is as follows:
the utility model provides a detection apparatus that prevention tunnel waterproof board is vacated behind one's back, the waterproof board sets up between preliminary bracing and secondary lining, and this detection apparatus is including detecting feedback body and signal receiver, it fixes on preliminary bracing to detect the feedback body, is connected with signal receiver through the wire for the signal of transmission waterproof board and preliminary bracing close paste, signal receiver installs on the mobile rack.
Preferably, the detection feedback body is a pressure strain gauge, the pressure strain gauge is fixed in the deepest part of a pit of a primary lining support, signals are transmitted to the signal receiver through a wire after the pressure strain gauge is deformed, and the wire is fixed by a self-adhesive wire buckle.
Preferably, the signal receiver comprises a shell, a signal indicator lamp corresponding to the detection feedback body is embedded in the shell, a signal conversion module, a signal amplifier and a power module are arranged in the shell, the pressure strain gauge is connected with the input end of the signal converter, the output end of the signal converter is connected with the input end of the signal amplifier, the output end of the signal amplifier is connected with the signal indicator lamp, a power switch connected with the internal power module is arranged at the upper end of the shell, and the power module supplies power to the signal conversion module, the signal amplifier and the signal indicator lamp.
Preferably, the travelling gantry includes base, sleeve, interior pole, fixed station, mount and hydraulic telescoping rod, the sleeve is installed on the base, the lower extreme of interior pole is installed inside the sleeve and can be followed the sleeve and reciprocate, its upper end and fixed station bottom fixed connection, the mount passes through the bolt fastening on the fixed station, signal receiver is spacing on the mount, hydraulic telescoping rod's one end and sleeve lateral wall are connected, and its other end and interior pole lateral wall are connected, the base bottom is provided with the universal wheel.
Preferably, the fixing frame comprises a C-shaped fixing plate, a rear frame, a backing plate, a fixing block, a guide rod, a connecting plate, a rack, a gear, a support rod and a traction block, wherein circuitous edges distributed along the contour of the C-shaped fixing plate are arranged on the left side wall and the right side wall of the C-shaped fixing plate, the rear frame is arranged at the rear end of the C-shaped fixing plate, the backing plate is arranged at the front end of the C-shaped fixing plate, the backing plate is of a U-shaped structure, the connecting rod is arranged at the end parts of the two sides of the backing plate, adaptation grooves matched with the end parts of the two sides of the backing plate are arranged on the front side wall of the C-shaped fixing plate, through holes are formed in the rear part of the adaptation grooves, the two connecting rods are respectively arranged in the through holes and penetrate through the rear side wall of the C-shaped fixing plate, the two connecting rods are connected through the connecting plate, one end of the rack is arranged on the connecting plate and is meshed with the gear above the connecting plate, the gear is arranged on the supporting rod, two ends of the supporting rod are respectively arranged on the side wall of the rear frame, the other end of the rack penetrates into a limiting cavity in the C-shaped fixing plate from the rear side wall of the C-shaped fixing plate, the end part of the rack is connected with the traction block, guide grooves are respectively arranged on the front side and the rear side of the limiting cavity, a rubber pad and a supporting rod are arranged in the guide grooves, the rubber pad is of a trapezoidal structure and is arranged along the two side walls of the guide grooves, the supporting rod is positioned in the rubber pad, and one end of the supporting rod is connected with the traction block;
the utility model discloses a fixed bolster, including fixed block, guide arm, first dog and second dog, the guide arm is installed in the bottom surface of backing plate, the lower extreme of guide arm runs through the fixed station and stretches into the fixed intracavity of fixed block, the fixed block is provided with two and all installs the bottom surface at the fixed station, be provided with first dog and second dog on the guide arm, first dog is located fixed intracavity, the second dog is located the fixed block outside, still be provided with compression spring on the guide arm, compression spring is located between the inner diapire of first dog and fixed chamber.
Preferably, the tunnel drilling device further comprises a grouting pipe, the grouting pipe is horizontally embedded in the concave pit along the tunnel axis method and is arranged side by side with the detection feedback body, and the grouting pipe is fixed on the inner wall of the tunnel by adopting a punching-free adjustable pipe clamp.
Preferably, the punching-free adjustable pipe clamp comprises a mounting plate, a sticking layer, a right clamping block, a left limiting block and an arc-shaped pipe clamp, wherein the sticking layer is stuck on the lower surface of the mounting plate, the right clamping block and the left limiting block are symmetrically arranged on the upper surface of the mounting plate, a sliding groove is formed in the upper bent inner surface of the right clamping block, the arc-shaped pipe clamp is mounted in the sliding groove, teeth are arranged on the outer wall of the arc-shaped pipe clamp, and tooth grooves matched with the teeth are formed in the upper bent inner surface of the left limiting block; the mounting plate is further provided with a fixed block, the fixed block is positioned on the left side of the left limiting block, a cavity is formed in the fixed block, a movable rod is arranged in the cavity, one end of the movable rod is provided with a guide block, the other end of the movable rod extends out of an opening formed in the side wall of the fixed block and is connected with a straight arm on the outer side of the left limiting block, and a compression spring is arranged on the movable rod between the left limiting block and the fixed block;
one to two layers of buffer parts distributed along the circumferential direction of the inner wall of the cavity are arranged on the inner wall of the cavity, each buffer part is of an annular structure formed by a plurality of rubber strips in a centripetal surrounding mode, and the end part of each buffer part is in a necking shape and is tightly attached to the wall of the movable rod;
the upper end face of the right clamping block is movably connected with a spring connecting piece, the end part of the spring connecting piece is provided with a lock catch, and one end part of the arc-shaped pipe clamp is provided with a connecting ring connected with the lock catch.
A detection method of a detection device for preventing the back of a tunnel waterproof plate from being empty is characterized by comprising the following steps:
step 1: before the waterproof board is hung, section detection is carried out, the positions of the primary shotcrete pits are marked one by one, numbering is carried out, and a signal receiver is installed on the fixing frame;
step 2: the pressure strain gauge is installed at the deepest part of each sunken pit, is connected with a signal receiver through a lead, and is horizontally embedded with a grouting pipe in each sunken pit along the axial direction of the tunnel;
and step 3: in the process of hanging the waterproof board, pressing the waterproof board when each pit is reached, stopping when the signal indicator light is on, and performing secondary lining for concrete pouring;
and 4, step 4: and observing the working condition of the signal indicator lamp corresponding to each pit in the process of pouring concrete.
Preferably, in step 2, the number of the pressure strain gauge is consistent with that of the primary support pit, and the pressure strain gauge is connected with an interface of a signal indicator lamp with the same number on the signal receiver.
Preferably, in step 4, when the concrete is poured into the secondary lining, the waterproof board at the primary support pit is pressed and contacts the pressure strain gauge in the pit, and then the corresponding indicator light on the signal receiver is lightened; if the signal indicator light is not bright, the signal indicator light still does not become bright after the drum tamping is strengthened, and after concrete pouring is finished, grouting and backfilling are timely carried out through a pre-embedded grouting pipe to be compact.
The invention has the beneficial effects that:
the detection device comprises a pressure strain gauge and a signal receiver, wherein a circuit in the signal receiver comprises a power supply module, a signal amplifier, a signal conversion module and a signal indicator lamp, when the concrete is cast for the second time, a waterproof plate is extruded to the deepest part of a primary support pit to enable the waterproof plate to contact the pressure strain gauge, the pressure strain gauge deforms to generate resistance, the resistance is converted into an electric signal through the signal conversion module to generate a weak electric signal, and the weak electric signal is amplified through a signal amplification circuit to enable small light bulbs on the signal receiver to be bright. The pressure strain gauge is installed in the primary support pit, so that the tightness between the waterproof plate and the primary support during the pouring of concrete of the secondary lining of the tunnel can be detected, and the composite lining is stronger in integrity, higher in quality and more reliable in safety.
The detection device comprises the moving rack, and the signal receiver is arranged on the moving rack, so that the signal receiver is convenient to fix, adjust the height and move, and the installation speed and the use flexibility of the signal receiver are improved.
The detection device also comprises a punching-free adjustable pipe clamp, and the grouting pipe is fixed on the punching-free adjustable pipe clamp, so that the detection device is simple to operate and firm in fixation, and the grouting stability of the grouting pipe is improved.
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 view showing an installation position of a detection apparatus for preventing a void at the back of a waterproof sheet for a tunnel according to the present invention in a cross section of the tunnel;
FIG. 2 is a view of the installation position of a detection device for preventing the back of a tunnel waterproof board from being hollow in the longitudinal section of a tunnel according to the invention;
FIG. 3 is a simplified diagram of a detection device for preventing the back of a tunnel waterproof board from being empty according to the present invention;
FIG. 4 is a schematic view of the self-adhesive wire fastener of the wire-laying fixing device of the present invention;
FIG. 5 is a schematic view of a punch-free adjustable pipe clamp of the grouting pipe arranging and fixing device of the present invention;
FIG. 6 is a cross-sectional view taken at A of FIG. 5;
FIG. 7 is a block diagram of a signal receiver mounted on a mobile gantry;
FIG. 8 is a block diagram of the mobile gantry;
FIG. 9 is a cross-sectional view taken at B of FIG. 8;
FIG. 10 is a side view of the mount;
FIG. 11 is a side cross-sectional view of the mount;
FIG. 12 is a front view of the mount;
FIG. 13 is a rear cross-sectional view of the mount;
FIG. 14 is a top view of the mount;
FIG. 15 is a combination view of the backing plate, link and connecting plate;
fig. 16 is a construction flow chart of a detection method for preventing a void behind a tunnel flashing according to the present invention;
description of the element reference numerals
1-primary support; 2-waterproof board; 3-secondary lining; 4-a compressive strain gauge; 5-a wire; 6-a signal receiver; 7-signal indicator light; 8-power switch; 9-dishing; 10-grouting pipe; 11-self-adhesive thread button; 12-punching-free adjustable pipe clamp; 1201-mounting plate; 1202-adhesive layer; 1203-right fixture block; 1204-arc pipe strap; 1205-a left stop block; 1206-fixed block; 13-gullet; 14-teeth; 15-connecting rings; 16-a spring connector; 17-a movable rod; 18-a compression spring; 19-a cavity; 20-a buffer; 21- "C" shaped fixing plate; 2101-adaptation slots; 2102-perforation; 2103-a limiting cavity; 2104-a channel; 2105-detour edges; 22-a stationary table; 23-an inner rod; 24-a sleeve; 25-hydraulic telescopic rod; 26-fixing blocks; 2601-a fixation cavity; 27-a guide rod; 28-backing plate; 29-a rear frame; 30-a connecting rod; 31-a support bar; 32-a rack; 33-gear wheel; 34-a traction block; 35-a strut; 36-rubber pad; 37-a connecting plate; 38-a first stop; 39-a second stop; 40-compression spring; 42-a suction cup; 43-a base; 44-universal wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments 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 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.
The tunnel secondary lining quality detection usually detects that the cavity phenomenon appears at the back of the lining, and the field verification shows that the cavities at two sides of the tunnel side wall are basically at the back of the waterproof board, which is caused by the fact that the waterproof board is not closely attached to the primary support, and the cavity of the tunnel arch part has three conditions, one is that the cavity appears between the waterproof board and the secondary lining concrete because the concrete is not filled and is guided to the place where the waterproof board is not filled, the other is caused by the fact that the waterproof board is not closely attached to the primary support, the third is that the cavities exist among the secondary lining concrete, the waterproof board and the primary support, the cavity between the waterproof board and the primary support is mainly caused by poor looseness control of the waterproof board, the cavity between the lining and the waterproof board is mainly located in the arch part and is caused by the fact that the concrete is not filled, the grouting backfill mode is usually adopted when the cavity between the waterproof board and the primary support is processed, but the waterproof board must be damaged when grouting backfill is carried out, the two-lining water leakage can be caused frequently, and a detection device and a detection method for preventing the tunnel waterproof board from being hollow behind the tunnel lining are provided for preventing the tunnel waterproof board from being hollow behind the tunnel lining.
As shown in fig. 1 to 3, the invention provides a detection device for preventing a tunnel waterproof board from being hollow at the back, which comprises a detection feedback body and a signal receiver 6, wherein the detection feedback body is connected with the signal receiver 6 through a lead 5. As shown in fig. 4, the lead 5 is fixed by a self-adhesive wire button 11. As shown in fig. 7, the signal receiver is mounted on a mobile gantry.
Specifically, the detection feedback body is provided with a plurality of pressure strain gauges 4, each pressure strain gauge 4 is fixed at the deepest part of a corresponding pit 9 on the primary lining support 1, and the detection feedback body is used for transmitting a signal whether the waterproof plate 2 is closely attached to the primary lining support 1 or not to the signal receiver 6 when the secondary lining 3 is poured with concrete.
The pressure strain gauge 4 is fixed by strong glue, firstly, the deepest part of the pit 9 of the primary lining support 1 is polished to be flat and is processed cleanly, and then the back of the pressure strain gauge 4 is coated with the strong glue and is stuck to the processed part.
In the construction process, the signal receiver is generally placed on the ground, but construction is seriously affected, and potential safety hazards exist. Based on the mobile platform, the signal receiver is arranged on the mobile platform, so that the operation is simple, the use safety of the signal receiver is improved, and the later operation is convenient. The signal receiver 6 comprises a shell, a signal indicating lamp 7 corresponding to the detection feedback body is embedded in the shell, a signal conversion module, a signal amplifier and a power module are arranged in the shell, the pressure strain gauge 4 is connected with the input end of the signal converter, the output end of the signal converter is connected with the input end of the signal amplifier, the output end of the signal amplifier is connected with the signal indicating lamp 7, a power switch 8 connected with the internal power module is arranged at the upper end of the shell, and the power module supplies power to the signal conversion module, the signal amplifier and the signal indicating lamp.
As shown in fig. 7, the mobile platform comprises a base 43, a sleeve 24, an inner rod 23, a fixed platform 22, a fixed frame and a hydraulic telescopic rod 25, wherein the sleeve 24 is installed on the base 43, the lower end of the inner rod 23 is installed inside the sleeve 24 and can move up and down along the sleeve 24, the upper end of the inner rod is fixedly connected with the bottom of the fixed platform 22, the fixed frame is fixed on the fixed platform 22 through bolts, the signal receiver 6 is limited on the fixed frame, one end of the hydraulic telescopic rod 25 is connected with the side wall of the sleeve 24, the other end of the hydraulic telescopic rod 25 is connected with the side wall of the inner rod 23, and universal wheels 44 are arranged at the bottom of the base 43. It is convenient to move the signal receiver 6 and the height of the signal receiver 6 can be adjusted. Thereby increasing the flexibility of adjustment of the signal receiver 6.
As shown in fig. 8-15, the fixing frame includes a "C" type fixing plate 21, a rear frame 29, a backing plate 28, a fixing block 26, a guide rod 27, a connecting rod 30, a connecting plate 37, a rack 32, a gear 33, a support rod 31 and a traction block 34, the rear frame 29 is disposed at the rear end of the "C" type fixing plate 21, the backing plate 28 is disposed at the front end of the "C" type fixing plate 21, the backing plate 28 is in a "U" type structure, the connecting rod 30 is mounted at both side ends of the backing plate 28, an adapting groove 2101 matched with both side ends of the backing plate 28 is disposed on the front side wall of the "C" type fixing plate 21, a through hole 2102 is disposed behind the adapting groove 2101, the connecting rod 30 is provided with two connecting rods 30, which are respectively mounted in the through hole 2102 and penetrate through the rear side wall of the "C" type fixing plate 21, the two connecting rods 30 are connected by the connecting plate 37, one end of the rack 32 is disposed on the connecting plate 37 and meshed with the gear 33 above, the gear 33 sets up on the bracing piece 31, still is provided with the bearing between the inner wall of gear 33 and bracing piece 31, the both ends of bracing piece 31 are installed respectively and are located on the lateral wall of rear frame 29, the other end of rack 32 runs through to in its inside spacing chamber 2103 on the rear wall of "C" type fixed plate 21 to its tip is connected with traction block 34, the front and back both sides of spacing chamber 2103 are provided with guide slot 2104 respectively, be provided with branch 35 in the guide slot 2104, the one end and the traction block 34 of branch 35 are connected. Rubber pads 36 are disposed on both sides of the support bar 35, and the rubber pads 36 have a trapezoidal structure and are installed along both side walls of the guide groove 2104.
The guide rod 27 is installed on the bottom surface of the backing plate 38, the lower end of the guide rod 27 penetrates through the fixing table 22 and extends into the fixing cavity 2601 of the fixing block 26, the fixing block 26 is provided with two blocks and is installed on the bottom surface of the fixing table 22, the guide rod 27 is provided with a first stop 37 and a second stop 39, the first stop 38 is located in the fixing cavity 2601, the second stop 39 is located on the outer side of the fixing block 26, the guide rod 27 is further provided with a compression spring 40, and the compression spring 40 is located between the first stop 28 and the inner bottom wall of the fixing cavity 2601.
In this embodiment, the left and right side walls of the "C" shaped fixing plate 21 are provided with roundabout edges 2105 distributed along the contour thereof for limiting the signal receiver 6 left and right, thereby improving the stability of the signal receiver 6.
In this embodiment, a plurality of suction cups 42 are disposed on the front side wall of the "C" shaped fixing plate 21, and the suction cups 42 are located between the two fitting slots 2101 for defining the signal receiver 6.
In the process of installing the signal receiver 6, the backing plate 28 is pressed downwards, the guide rod 27 moves downwards along the fixing cavity 2601 and extrudes the compression spring 40, meanwhile, under the action of the backing plate 28, the connecting rod 30 is driven to move downwards, the rack 32 above the connecting rod 30 rotates around the gear 33, the traction block 34 at the other end of the traction rack 32 moves along the limiting cavity 2103, the supporting rods on two sides of the traction block 34 move in the guide groove 2104, the rubber pads 36 in the guide groove 2104 extrude the supporting rods, and the extrusion force is larger along with the upward movement of the supporting rods 35. The height of the support plate 28 is limited by the compression spring 4 and the rubber pad 36, so that the limitation of the signal receiver 6 is ensured, and the damage caused by the permanent compression of the signal receiver 6 under the compression spring 40 by the support plate 28 can be avoided.
In the process, the pressure strain gauge 4, the power supply module, the signal conversion module, the signal receiver and the signal indicator lamp 7 form a normally open circuit, the signal indicator lamp is turned off, a closed circuit is formed when the pressure strain gauge 4 deforms, and the signal indicator lamp 7 is turned on.
As shown in fig. 2, a grouting pipe 10 is horizontally buried in the pit 9 of each primary support 1 along the tunnel axis direction and arranged side by side with the detection feedback body; the grouting pipe 10 is fixed at a designated position by a punching-free adjustable pipe clamp 12. As shown in fig. 5 and 6.
The punching-free adjustable pipe clamp 12 comprises a mounting plate 1201, a sticky layer 1202, a right clamping block 1203, a left limiting block 1205 and an arc-shaped pipe clamp 1204, wherein the sticky layer 1202 is pasted on the lower surface of the mounting plate 1201, the right clamping block 1203 and the left limiting block 1205 are symmetrically arranged on the upper surface of the mounting plate 1201, the upper bent inner surface of the right clamping block 1203 is provided with a sliding groove, the arc-shaped pipe clamp 1204 is mounted in the sliding groove, the outer wall of the arc-shaped pipe clamp 1204 is provided with teeth 14, and the upper bent inner surface of the left limiting block 1205 is provided with tooth grooves 13 matched with the teeth 14; still be provided with the fixed block 1206 on the mounting panel 1201, the fixed block 1206 is located the left side of left stopper 1205, the inside of fixed block 1206 is provided with cavity 19, be provided with movable rod 17 in the cavity 19, the one end of movable rod 17 is provided with the guide block (not shown in the figure), and the opening that its other end set up on the lateral wall of fixed block 1206 stretches out and is connected with the straight arm in the outside of left stopper 1205, be provided with compression spring 18 on the movable rod 17 between left stopper 1205 and the fixed block 1206.
The upper end surface of the right clamping block 1203 is movably connected with a spring connecting piece 16, the end part of the spring connecting piece 16 is provided with a lock catch, and one end part of the arc-shaped pipe clamp 1204 is provided with a connecting ring 15 connected with the lock catch.
In this embodiment, the arc pipe clamp 1204 can slide relatively along the sliding slot, and after the grouting pipe 10 is clamped inside the arc pipe clamp 1204, the end of the arc pipe clamp 1204 can be manually pulled to connect the lock catch on the spring connector 16 with the connecting ring 15; after the left limiting block 1205 is pushed, the tooth grooves 13 on the inner curved surface of the left limiting block are matched with the tooth grooves 14 on the outer wall of the arc pipe clamp 1204, so that the arc pipe clamp 1204 is fixed relatively, and the grouting pipe 10 is limited inside the arc pipe clamp 1204. The whole structure is convenient to use and high in stability.
Secondly, the inner wall of the cavity 19 is provided with one to two layers of buffer parts 20 distributed along the circumferential direction, the buffer parts 20 are in an annular structure formed by centripetally surrounding a plurality of rubber strips, and the end parts of the buffer parts are in a necking shape and tightly attached to the wall of the movable rod 17.
In addition, the grouting pipe in the embodiment can also be used as an exhaust pipe.
In addition, the invention also provides a detection method for preventing the tunnel waterproof board from being hollow, as shown in fig. 16, the detection method comprises the following steps:
step 1: before the waterproof board 2 is hung, section detection is carried out, the positions of the primary shotcrete pits 9 are marked one by one, numbering is carried out, and the signal receiver 6 is arranged on the fixing frame;
step 2: the pressure strain gauge 4 is arranged at the deepest part of each pit 9, is connected with the signal receiver 6 through a lead 5, and a grouting pipe 10 is horizontally buried in each pit 9 along the axial direction of the tunnel;
and step 3: in the process of hanging the waterproof board 2, pressing the waterproof board 2 when each pit 9 arrives, stopping when the signal indicator light 7 is on, and performing concrete pouring on the secondary lining 3;
and 4, step 4: and observing the working condition of the signal indicator lamp 7 corresponding to each recessed pit 9 in the process of pouring concrete.
In the step 2, the number of the pressure strain gauge 4 is consistent with that of the pit 9 of the primary support 1, and the pressure strain gauge is connected with the interface of the signal indicator lamp with the same number on the signal receiver 6.
In the step 3, in the process of hanging the waterproof board 2, the waterproof board is manually pressed every time when the pit 9 is reached until the strain gauge indicator light 7 is on, on one hand, the working effect of the strain gauge is detected, on the other hand, the looseness of the waterproof board is determined, and the waterproof board is prevented from being too tight or too loose, so that the waterproof board cannot be effectively attached to the concrete spraying surface.
In the step 4, the working condition of the indicator light of each pit 9 is observed in the concrete pouring process, if each light is on, the waterproof board 2 is well attached to the primary support, if the light is not on when the concrete is poured into a pit, the reinforcing tamping or the reason finding should be carried out, and if the light is still not on after the measures are taken, the grouting and backfilling should be carried out in time through the pre-embedded grouting pipe after the concrete pouring is finished.
The method solves the prediction problem of the back void of the tunnel waterproof board, and can replace the traditional method for destroying the waterproof board to carry out grouting and backfilling. The method has the advantages of simple structure, low cost, simple operation and easy mastering, can predict the problem of the back void of the tunnel waterproof board in advance, avoid the work of grouting caused by the back void of the tunnel waterproof board in the later period, and ensure the construction period while reducing the construction cost; the tunnel construction detection device is reasonable in structural design, ingenious and novel in conception, breaks through the traditional method, greatly enriches the tunnel construction detection devices, and has extremely wide popularization value.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a detection apparatus that prevention tunnel waterproof board is vacated behind one's back, the waterproof board sets up between preliminary bracing and secondary lining, its characterized in that, this detection apparatus is including detecting feedback body and signal receiver, it fixes on preliminary bracing to detect the feedback body, is connected with signal receiver through the wire for transmit the signal that waterproof board and preliminary bracing are sealed, signal receiver installs on the mobile station frame.
2. The device of claim 1, wherein the detection feedback body is a pressure strain gauge fixed at the deepest part of the pit of the primary lining support, the pressure strain gauge transmits a signal to the signal receiver through a wire after being deformed, and the wire is fixed by a self-adhesive wire fastener.
3. The device according to claim 1, wherein the signal receiver comprises a housing, a signal indicator corresponding to the detection feedback body is embedded in the housing, a signal conversion module, a signal amplifier and a power supply module are arranged in the housing, the pressure strain gauge is connected with an input end of the signal converter, an output end of the signal converter is connected with an input end of the signal amplifier, an output end of the signal amplifier is connected with the signal indicator, a power switch connected with the internal power supply module is arranged at an upper end of the housing, and the power supply module supplies power to the signal conversion module, the signal amplifier and the signal indicator.
4. The detection device for preventing the tunnel waterproof plate from being hollow behind as claimed in claim 3, wherein the moving rack comprises a base, a sleeve, an inner rod, a fixed platform, a fixed frame and a hydraulic telescopic rod, the sleeve is mounted on the base, the lower end of the inner rod is mounted inside the sleeve and can move up and down along the sleeve, the upper end of the inner rod is fixedly connected with the bottom of the fixed platform, the fixed frame is fixed on the fixed platform through bolts, the signal receiver is limited on the fixed frame, one end of the hydraulic telescopic rod is connected with the side wall of the sleeve, the other end of the hydraulic telescopic rod is connected with the side wall of the inner rod, and universal wheels are arranged at the bottom of the base.
5. The detection device for preventing the tunnel waterproof plate from being hollowed out behind according to claim 4, wherein the fixing frame comprises a C-shaped fixing plate, a rear frame, a backing plate, a fixing block, a guide rod, a connecting plate, a rack, a gear, a supporting rod and a traction block, circuitous edges distributed along the contour of the C-shaped fixing plate are arranged on the left side wall and the right side wall of the C-shaped fixing plate, the rear frame is arranged at the rear end of the C-shaped fixing plate, the backing plate is arranged at the front end of the C-shaped fixing plate, the backing plate is of a U-shaped structure, the connecting rod is arranged at the end parts of the two sides of the backing plate, the front side wall of the C-shaped fixing plate is provided with adaptive grooves matched with the end parts of the two sides of the backing plate, through holes are arranged behind the adaptive grooves, two connecting rods are respectively arranged in the through holes and penetrate through the rear side wall of the C-shaped fixing plate, the two connecting rods are connected through a connecting plate, one end of the rack is arranged on the connecting plate and meshed with a gear above the rack, the gear is arranged on a supporting rod, two ends of the supporting rod are respectively arranged on the side wall of the rear frame, the other end of the rack penetrates into a limiting cavity in the C-shaped fixing plate from the rear side wall of the C-shaped fixing plate, the end part of the rack is connected with a traction block, guide grooves are respectively arranged on the front side and the rear side of the limiting cavity, rubber pads and supporting rods are arranged in the guide grooves, the rubber pads are in a trapezoidal structure and are arranged along the two side walls of the guide grooves, the supporting rods are arranged in the rubber pads, and one end of each supporting rod is connected with the traction block;
the utility model discloses a fixed bolster, including fixed block, guide arm, first dog and second dog, the guide arm is installed in the bottom surface of backing plate, the lower extreme of guide arm runs through the fixed station and stretches into the fixed intracavity of fixed block, the fixed block is provided with two and all installs the bottom surface at the fixed station, be provided with first dog and second dog on the guide arm, first dog is located fixed intracavity, the second dog is located the fixed block outside, still be provided with compression spring on the guide arm, compression spring is located between the inner diapire of first dog and fixed chamber.
6. The detection device for preventing the tunnel waterproof plate from being hollow behind according to claim 1, further comprising a grouting pipe, wherein the grouting pipe is horizontally embedded in the concave pit along a tunnel axis method and is arranged side by side with the detection feedback body, and the grouting pipe is fixed on the inner wall of the tunnel by adopting a punching-free adjustable pipe clamp.
7. The detection device for preventing the tunnel waterproof plate from being hollow behind as claimed in claim 6, wherein the punching-free adjustable pipe clamp comprises a mounting plate, an adhesive layer, a right clamping block, a left limiting block and an arc-shaped pipe clamp, the adhesive layer is adhered to the lower surface of the mounting plate, the right clamping block and the left limiting block are symmetrically arranged on the upper surface of the mounting plate, a chute is arranged on the upper bent inner surface of the right clamping block, the arc-shaped pipe clamp is mounted in the chute, teeth are arranged on the outer wall of the arc-shaped pipe clamp, and tooth grooves matched with the teeth are arranged on the upper bent inner surface of the left limiting block; the mounting plate is further provided with a fixed block, the fixed block is positioned on the left side of the left limiting block, a cavity is formed in the fixed block, a movable rod is arranged in the cavity, one end of the movable rod is provided with a guide block, the other end of the movable rod extends out of an opening formed in the side wall of the fixed block and is connected with a straight arm on the outer side of the left limiting block, and a compression spring is arranged on the movable rod between the left limiting block and the fixed block;
one to two layers of buffer parts distributed along the circumferential direction of the inner wall of the cavity are arranged on the inner wall of the cavity, each buffer part is of an annular structure formed by a plurality of rubber strips in a centripetal surrounding mode, and the end part of each buffer part is in a necking shape and is tightly attached to the wall of the movable rod;
the upper end face of the right clamping block is movably connected with a spring connecting piece, the end part of the spring connecting piece is provided with a lock catch, and one end part of the arc-shaped pipe clamp is provided with a connecting ring connected with the lock catch.
8. The detection method of the detection device for preventing the tunnel waterproof board from being hollow according to any one of claims 1 to 7, characterized by comprising the following steps:
step 1: before the waterproof board is hung, section detection is carried out, the positions of the primary shotcrete pits are marked one by one, numbering is carried out, and a signal receiver is installed on the fixing frame;
step 2: the pressure strain gauge is installed at the deepest part of each sunken pit, is connected with a signal receiver through a lead, and is horizontally embedded with a grouting pipe in each sunken pit along the axial direction of the tunnel;
and step 3: in the process of hanging the waterproof board, pressing the waterproof board when each pit is reached, stopping when the signal indicator light is on, and performing secondary lining for concrete pouring;
and 4, step 4: and observing the working condition of the signal indicator lamp corresponding to each pit in the process of pouring concrete.
9. The method as claimed in claim 8, wherein in step 2, the number of the pressure strain gauge is identical to the number of the preliminary bracing indentation and the pressure strain gauge is connected to the interface of the signal indicator light with the same number on the signal receiver.
10. The method for detecting the void behind the tunnel waterproof board according to claim 8, wherein in the step 4, when the concrete is poured in the secondary lining, the waterproof board at the primary support pit will be pressed and make it contact with the pressure strain gauge in the pit, and the corresponding indicator light on the signal receiver will be bright; if the signal indicator light is not bright, the signal indicator light still does not become bright after the drum tamping is strengthened, and after concrete pouring is finished, grouting and backfilling are timely carried out through a pre-embedded grouting pipe to be compact.
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| CN202110383566.7A CN113310791A (en) | 2021-04-09 | 2021-04-09 | Detection device and detection method for preventing tunnel waterproof board from being hollow behind |
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| CN202110383566.7A CN113310791A (en) | 2021-04-09 | 2021-04-09 | Detection device and detection method for preventing tunnel waterproof board from being hollow behind |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509375A (en) * | 2021-12-17 | 2022-05-17 | 中南大学 | Subway tunnel construction section of jurisdiction infiltration detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509375A (en) * | 2021-12-17 | 2022-05-17 | 中南大学 | Subway tunnel construction section of jurisdiction infiltration detection device |
| CN114509375B (en) * | 2021-12-17 | 2024-02-23 | 中南大学 | Subway tunnel construction section of jurisdiction infiltration detection device |
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