Tunnel non-dense experiment detection device

Abstract

The utility model discloses a tunnel non-dense experiment detection device which comprises two fixing plates, two arch frames are arranged between the two fixing plates, the two ends of each arch frame are connected with the two fixing plates through two supporting adjusting assemblies respectively, and each supporting adjusting assembly comprises a threaded pipe, a threaded rod, a positioning pipe and a positioning screw. The threaded pipe is vertically arranged on the fixing plate, the upper end of the threaded pipe is in threaded connection with a threaded rod, the upper end of the threaded rod is fixedly connected with a positioning pipe, a positioning threaded hole is formed in the side wall of the positioning pipe, and a positioning screw is arranged in the positioning threaded hole; a plurality of distributed compaction sensors are arranged between the double-layer positioning pieces, the two ends of each double-layer positioning piece are fixedly connected with the two arch frames respectively, a mounting plate is arranged between every two adjacent double-layer positioning pieces, the two ends of each mounting plate are fixedly connected with the two arch frames respectively, and a plurality of pressure sensors are arranged on the mounting plates. The lining pouring compactness can be efficiently and comprehensively monitored, and the result reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel detection equipment, in particular to a tunnel non-tightness test detection device. Background Technique

[0002] A tunnel is an engineering structure buried in the stratum and is a form of human utilization of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels, military tunnels, etc. The structure of a tunnel includes two parts: the main building and the auxiliary equipment. The main building consists of the tunnel body and the portal, and the auxiliary equipment includes refuge bays, fire-fighting facilities, emergency communication, and waterproofing and drainage facilities. Long tunnels also have special ventilation and lighting equipment. When constructing a tunnel, the cut-and-cover method is usually used, that is, the ground is not excavated, and the construction is carried out by digging holes underground. The mining method and the shield method both belong to the cut-and-cover method.

[0003] Due to the influence of tunnel concrete construction defects and the shrinkage rate of the concrete itself, it is inevitable that voids or even cavities will appear between the secondary lining concrete poured on the tunnel vault and the waterproof board, that is, the void of the tunnel secondary lining vault. The void of the tunnel secondary lining vault is a common construction defect during the tunnel construction process. Lining void is the main cause of cracking and spalling, directly threatening the tunnel structure and driving safety. In the past, tunnel void monitoring required people to stand on the maintenance frame and use ground penetrating radar for detection. The detection process was complex and there were safety hazards. During the process of pouring secondary lining concrete in domestic tunnels, most of them used manual visual inspection at the end arch of the secondary lining trolley. The construction workers judged whether the secondary lining concrete was poured sufficiently based on experience, which consumed a lot of labor, and the working space was narrow, which was easy to cause injuries to the construction workers. Moreover, this method often could not guarantee the quality and efficiency of secondary lining construction. On this basis, there are also some technical improvements in this technical field at present, including installing a probe on the vault. When the concrete touches the probe, an alarm is triggered to judge whether there is a void defect. However, this type of technology is easily blocked and fails, resulting in low reliability of the detection results. Content of the Utility Model

[0004] The utility model provides a tunnel non-tightness test detection device, which solves the problems of low efficiency and low reliability in detecting the compactness during the pouring of the secondary lining of traditional tunnels.

[0005] The utility model provides a tunnel non-hermetic experiment detection device, which comprises two fixing plates. Between the two fixing plates, two parallel arch frames are arranged. The two ends of each arch frame are respectively connected with the two fixing plates through two support adjusting components. Each support adjusting component comprises a threaded pipe, a threaded rod, a positioning pipe and a positioning screw. The threaded pipe is vertically arranged on the fixing plate. The upper end of the threaded pipe is threadedly connected with the threaded rod. The upper end of the threaded rod is fixedly connected with the positioning pipe. A positioning threaded hole is arranged on the side wall of the positioning pipe. A positioning screw is arranged in the positioning threaded hole. One end of the arch frame is inserted into the positioning pipe and fastened radially through the positioning screw. A plurality of double-layer positioning pieces are arranged circumferentially between the two arch frames. A plurality of distributed compaction sensors are arranged between each two double-layer positioning pieces. The two ends of the double-layer positioning piece are respectively fixedly connected with the two arch frames. An installation plate is arranged between two adjacent double-layer positioning pieces. The two ends of the installation plate are respectively fixedly connected with the two arch frames. A plurality of pressure sensors are arranged on the installation plate.

[0006] In the above technical solution, further, the two fixing plates are respectively fixedly connected with the two inner side walls of the tunnel through anchor bolts.

[0007] In the above technical solution, further, a horizontal plate is arranged between the crowns of the two arch frames. An installation hole is arranged in the middle of the horizontal plate. A liquid level gauge is arranged in the installation hole.

[0008] In the above technical solution, further, the double-layer positioning piece is connected with the arch frame through a connecting piece.

[0009] In the above technical solution, further, the connecting piece comprises a connecting plate, a gasket and a fastening screw. One end of the connecting plate is provided with a positioning sleeve integrally connected therewith. The other end surface is provided with a slot. The connecting plate is fixed by sleeving the positioning sleeve on the arch frame. A part of the double-layer positioning piece extends into the slot. A gasket is arranged on the surface of the extending end of the double-layer positioning piece. A screw hole communicated with the slot is arranged on the connecting plate. A fastening screw is arranged in the screw hole to press and fix the gasket on the double-layer positioning piece.

[0010] In the above technical solution, further, the distributed compaction sensors, the pressure sensors and the liquid level gauge are connected with a terminal controller through monitoring extension wires.

[0011] It can be seen from the above technical solutions that the utility model provides a tunnel non-hermetic experiment detection device.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model detects the compactness of the tunnel through the cooperation of a pressure sensor and a distributed compaction sensor, which not only ensures a large detection range but also the reliability of detection. At the same time, by installing the pressure sensor and the distributed compaction sensor on the arch frame, it prevents the sensors from falling off during the concrete pouring process and affecting the reliability of detection. The installation height of the arch frame can be adjusted through the support adjustment component, so that the sensors on the arch frame are closely attached to the surface of the geotextile for stable installation, with high installation accuracy. Through the compactness of the sensor measuring points, the compactness of the lining pouring can be comprehensively monitored, with reliable results, low cost, simple installation, eliminating potential safety hazards. By extending the monitoring extension wire to the arch bottom, the inspectors can conduct inspections on the ground. Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for use in the implementation cases will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a front view structural schematic diagram of a tunnel non-compactness experimental detection device proposed by the present utility model;

[0016] Figure 2 It is a side view structural schematic diagram of a tunnel non-compactness experimental detection device proposed by the present utility model;

[0017] Figure 3 It is a cross-sectional view structural schematic diagram of the support adjustment component of a tunnel non-compactness experimental detection device proposed by the present utility model;

[0018] Figure 4 It is an attached Figure 2 partial enlarged structural schematic diagram of the present utility model;

[0019] Figure 5 It is an installation position structural schematic diagram of a tunnel non-compactness experimental detection device proposed by the present utility model.

[0020] In the figure:

[0021] 1 - fixing plate;

[0022] 2 - arch frame; 21 - horizontal plate; 22 - liquid level gauge;

[0023] 3 - support adjustment component; 31 - threaded pipe; 32 - threaded rod; 33 - positioning pipe; 34 - positioning screw;

[0024] 4 - double-layer positioning piece; 41 - distributed compaction sensor;

[0025] 5 - mounting plate; 51 - pressure sensor;

[0026] 6 - Connector; 61 - Connection plate; 62 - Gasket; 63 - Fastening screw; 611 - Positioning sleeve; 612 - Slot

[0027] 100 - Tunnel; 101 - Geotextile; 102 - Waterproof board Detailed implementation mode

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0029] Embodiment 1:

[0030] See Figures 1-5, A tunnel leak detection device, comprising two vertically arranged fixing plates 1 spaced on both sides inside the tunnel. Between the two fixing plates 1, two parallel arch frames 2 are arranged. The arch frames 2 are arch-shaped steel bars. Each end of each arch frame 2 is connected to the two fixing plates 1 through two support adjustment components 3. Each support adjustment component 3 includes a threaded pipe 31, a threaded rod 32, a positioning pipe 33, and a positioning screw 34. The threaded pipe 31 is vertically arranged on the fixing plate 1. An internal thread is machined along the axial direction inside the threaded pipe 31. The lower end of the threaded rod 32 is coaxially threadedly connected to the upper end of the threaded pipe 31. The upper end of the threaded rod 32 is coaxially welded and fixedly connected to the positioning pipe 33. A positioning threaded hole is arranged on the side wall of the positioning pipe 33. The positioning threaded hole communicates with the inner cavity of the positioning pipe 33. The positioning screw 34 is threadedly connected in the positioning threaded hole. One end of the arch frame 2 is inserted into the positioning pipe 33 and fastened radially by the positioning screw 34. A plurality of double-layer positioning sheets 4 are arranged circumferentially between the two arch frames 2. The double-layer positioning sheets 4 are double-layer Pet material films. A plurality of distributed compaction sensors 41 are arranged in an array between each pair of double-layer positioning sheets 4. The double-layer positioning sheets 4 are bonded together by glue. The two ends of the double-layer positioning sheets 4 are respectively fixedly connected to the two arch frames 2. An installation plate 5 is arranged between two adjacent double-layer positioning sheets 4. The two ends of the installation plate 5 are respectively welded and fixedly connected to the two arch frames 2. Four pressure sensors 51 are arranged at intervals on the installation plate 5. After pouring the concrete, the waterproof board is made to fit and press against the surface of the geotextile, and at the same time press against the pressure sensors 51. The pressure sensors 51 can be used to disperse the detection of the pressure of the poured concrete. When the pressure of the pressure sensors 51 is maintained within the set range, it indicates that the waterproof board and the geotextile are closely attached together and there is no non-compact phenomenon. The distributed compaction sensors 41 can be used to detect the compaction of the concrete poured at the arch top more densely. By using the pressure sensors 51 in cooperation with the distributed compaction sensors 41 to detect the tunnel compaction, it not only ensures a large detection range but also ensures the reliability of the detection. At the same time, by installing the pressure sensors 51 in cooperation with the distributed compaction sensors 41 on the arch frames 2, it prevents the sensors from falling off during the concrete pouring process and prevents affecting the reliability of the detection. The installation height of the arch frames 2 can be adjusted through the support adjustment components 3, so that the sensors on the arch frames 2 are closely attached to the surface of the geotextile and stably installed, with high installation accuracy.

[0031] In this embodiment, the two fixing plates 1 are respectively fixedly connected to the two inner side walls of the tunnel through anchor bolts. Positioning holes are machined on the fixing plates 1. The fixing plates 1 are fixed on the arch wall of the tunnel by passing the anchor bolts through the positioning holes and inserting them into the rock and soil layers of the tunnel wall to stably support the arch frames 2.

[0032] In this embodiment, refer to Figure 2, a horizontal plate 21 is arranged between the crowns of two arch frames 2. An installation hole is arranged in the middle of the horizontal plate 21, and a liquid level gauge 22 is arranged in the installation hole. The liquid level gauge 22 is installed at the highest point of the arch frame 2 and extends through the waterproof board into the secondary lining concrete. After the concrete is poured, it can accurately display the shrinkage height of the concrete and provide a basis for the construction of the secondary concrete pouring.

[0033] In this embodiment, refer to Figure 3 , the double-layer positioning piece 4 is connected to the arch frame 2 through a connecting piece 6. The connecting piece 6 includes a connecting plate 61, a gasket 62, and a fastening screw 63. One end of the connecting plate 61 is provided with a positioning sleeve 611 integrally connected thereto. A threaded hole is arranged on the side wall of the positioning sleeve 611, and a jackscrew is arranged in the threaded hole. The positioning sleeve 611 is fastened to the arch frame 2 through the jackscrew. A slot 612 is arranged on the end face of the other end of the connecting plate 61. The connecting plate 61 is sleeved on the arch frame 2 through the positioning sleeve 611 and fixed. A part of the double-layer positioning piece 4 extends into the slot 612. A gasket 62 is arranged on the surface of the extending end of the double-layer positioning piece 4. A screw hole communicating with the slot 612 is arranged on the connecting plate 61, and a fastening screw 63 is arranged in the screw hole to press and fix the gasket 62 on the double-layer positioning piece 4, realizing the quick connection between the double-layer positioning piece 4 and the arch frame 2. At the same time, the double-layer positioning piece 4 will not be damaged, keeping the double-layer positioning piece 4 flat and preventing the double-layer positioning piece 4 from wrinkling and causing the sensors to stack together.

[0034] In this embodiment, the distributed compaction sensor 41, the pressure sensor 51, and the liquid level gauge 22 are connected to the terminal controller through monitoring extension wires. The sensor measuring points are dense, which can comprehensively monitor the compaction of the lining pouring. The results are reliable, the cost is low, the installation is simple, and the potential safety hazards are eliminated. By extending the monitoring extension wires to the arch bottom, the inspectors can perform inspections on the ground. The tunnel anti-void distributed compaction sensor uses a pure physical method to identify whether the two-layer interface is squeezed. It is arranged between the geotextile and the waterproof board, and can identify whether the waterproof board is closely attached to the geotextile and the primary support due to the extrusion of the secondary lining concrete, so as to determine whether the secondary lining concrete is poured densely.

[0035] In this embodiment, the tunnel anti-void distributed compaction sensor includes a distributed compaction sensor 5, a monitoring extension wire, and a direct display and communication terminal. By longitudinally arranging a measuring line in the arch part of the tunnel and using the communication terminal to monitor the compaction of the arch concrete, the tunnel anti-void distributed compaction sensor is applied in the process of the tunnel secondary lining construction, mainly used for monitoring the compaction of the lining concrete, effectively preventing the common quality problems of tunnel void and concrete pouring compaction and effectively eliminating potential safety hazards. The application effect is remarkable, and it has a wide application prospect and can be widely promoted and used.

[0036] As can be seen from the above technical solutions, during use, the two arch frames 2 and the fixing plates 1 are installed between the geotextile 101 and the waterproof plate 102. The two fixing plates 1 are fixedly connected to the two inner side walls of the tunnel through anchor bolts. Then, the distributed compaction sensors 5, the pressure sensors 51, and the liquid level gauges 22 are successively installed on the two arch frames 2. The communication terminal switch is turned on. The distributed compaction sensor 41 can detect the compactness of the concrete poured at the vault more densely. The distributed compaction sensor 41 feeds back signals, and the compactness is judged by the display of red and green lights. The display of a green light indicates that the concrete pouring is compact, the sensor is in a stressed state, and there is no void phenomenon; the display of a red light indicates that the sensor is not stressed and there is a void phenomenon at this measuring point. The pressure sensors 51 can detect the pressure of the poured concrete dispersedly. When the pressure of the pressure sensor 51 is maintained within the set range, it indicates that the waterproof plate and the geotextile are closely attached together and there is no non-compact phenomenon.

[0037] After considering the specification and the practice of the disclosed utility model herein, those skilled in the art will readily conceive of other embodiments of the present utility model. The present utility model is intended to cover any variations, uses, or adaptations of the present utility model, which follow the general principles of the present utility model and include the common general knowledge or conventional technical means in the technical field not disclosed in the present utility model. The specification and the embodiments are only regarded as exemplary, and the true scope of the present utility model is pointed out by the claims.

[0038] It should be understood that the present utility model is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present utility model do not constitute a limitation on the protection scope of the present utility model.

Claims

1. A tunnel leak test detection device, characterized by: The invention comprises two fixing plates (1), two parallel arch frames (2) are arranged between the two fixing plates (1), two ends of each arch frame (2) are respectively connected to the two fixing plates (1) through two support adjustment components (3), each support adjustment component (3) comprises a threaded tube (31), a threaded rod (32), a positioning tube (33), and a positioning screw (34), the threaded tube (31) is vertically arranged on the fixing plate (1), the upper end of the threaded tube (31) is threadedly connected to the threaded rod (32), the upper end of the threaded rod (32) is fixedly connected to the positioning tube (33), a positioning threaded hole is arranged on the side wall of the positioning tube (33), and the positioning screw (34) is fixedly connected to the positioning tube (33). A positioning screw (34) is arranged in the threaded hole, one end of the arch frame (2) is inserted into the positioning tube (33) and is radially fastened by the positioning screw (34), a plurality of double-layer positioning plates (4) are circumferentially arranged between the two arch frames (2), a plurality of distributed pressure sensors (41) are arranged between each of the double-layer positioning plates (4), the two ends of the double-layer positioning plates (4) are respectively fixedly connected to the two arch frames (2), a mounting plate (5) is arranged between two adjacent double-layer positioning plates (4), the two ends of the mounting plate (5) are respectively fixedly connected to the two arch frames (2), and a plurality of pressure sensors (51) are arranged on the mounting plate (5).

2. A tunnel leak test detection device according to claim 1, characterized in that: The two fixing plates (1) are fixedly connected to the two inner side walls of the tunnel respectively through anchor rods.

3. A tunnel leak test detection device according to claim 1, characterized in that: A horizontal plate (21) is arranged between the arch tops of the two arch frames (2), a mounting hole is arranged in the middle of the horizontal plate (21), and a liquid level meter (22) is arranged in the mounting hole.

4. A tunnel leak test detection device according to claim 1, characterized in that: The double-layer positioning sheet (4) is connected to the arch frame (2) via a connecting piece (6).

5. A tunnel leak test detection device according to claim 4, characterized in that: The connecting member (6) comprises a connecting plate (61), a gasket (62), and a fastening screw (63); a positioning sleeve (611) integrally connected to the connecting plate (61) is arranged at one end, and a slot (612) is arranged at the other end surface; the connecting plate (61) is fixed on the arch frame (2) by means of the positioning sleeve (611); the double-layer positioning plate (4) partially extends into the slot (612); a gasket (62) is arranged on the extending end surface of the double-layer positioning plate (4); a screw hole connected to the slot (612) is arranged on the connecting plate (61); a fastening screw (63) is arranged in the screw hole to press and fix the gasket (62) on the double-layer positioning plate (4).

6. The tunnel leak test detection device according to claim 1, characterized in that: The distributed pressure sensor (41) and the pressure sensor (51) are connected to the terminal controller via a monitoring extension line.

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