Safety and stability control device for large-section pipe jacking underneath crossing road construction and use method

Abstract

The invention discloses a safety and stability control device for large-section pipe jacking underneath crossing road construction and a using method, and relates to the technical field of railway construction, the safety and stability control device comprises a fixing piece and a settlement monitoring mechanism, the settlement monitoring mechanism comprises a pre-embedded block, a ball, a permanent magnet, a track, a detection platform, a gravity sensing piece and an electromagnet, the pre-embedded block is pre-embedded in a soil layer, and the ball is embedded in the soil layer; a ball groove is formed in the embedded block, a ball body is arranged in the ball groove in a rolling mode, a permanent magnet is embedded in the ball body, the track is horizontally arranged in the tunnel, the track is connected to the inner side wall of the tunnel through a fixing piece, a detection platform is connected to the track in a sliding mode, a gravity sensing piece is arranged on the detection platform, and an electromagnet is arranged above the gravity sensing piece. Through mutual cooperation of the permanent magnet, the electromagnet, the gravity sensing sheet and other structures, the settlement depth of a soil layer can be accurately measured, and when the pre-embedded block inclines in the settlement process, the ball body can generate self-adaptive rolling, so that the permanent magnet is always in a horizontal state, and the precision of a detection result is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of railway construction, and more specifically to a safety and stability control device and a use method for large-section jacking pipe underpass road construction. Background Art

[0002] With the continuous development of transportation infrastructure, more and more railways, highways, subways and culverts are being put into construction. With so many construction projects, it is inevitable that existing construction will pass under or over existing buildings. Among them, jacking under the existing operating railway is a typical form.

[0003] In the prior art, a Chinese invention patent with the announcement number CN115468536B discloses a surface settlement monitoring device for a rectangular jacking tunnel under a high-speed railway. When in use, the detection tube is buried in the soil layer, and then the lifting plate is connected to the upper end of the detection tube. When the surface settles, the detection tube is pulled, and then the lifting plate is pulled to slide. The sliding of the lifting plate drives the sliding of the lifting rod, and the sliding of the lifting rod realizes the sliding of the liquid inside the monitoring tube. When the surface settlement exceeds the set value, a signal is sent to the alarm through the liquid level sensor, and then the alarm is sounded through the alarm. However, the above technical solution still has the following defects when used: 1. When the soil layer at the detection tube settles unevenly or non-vertically, the detection tube will be skewed, resulting in errors in the detection results; 2. Since the base is placed on the ground, when the range of soil settlement is large, the base will also move down with the soil layer, resulting in errors in the detection results. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention proposes a safety and stability control device and a method for using large-section jacking pipe underpass road construction. Through the mutual cooperation of structures such as permanent magnets, electromagnets and gravity sensing sheets, the settlement depth of the soil layer can be accurately measured to guide construction operations. When the embedded block tilts during the settlement process, the sphere can produce adaptive rolling to keep the permanent magnet in a horizontal state at all times, thereby ensuring the accuracy of the detection results.

[0005] To achieve this object, the present invention adopts the following technical solutions: The invention provides a safety and stability control device for large-section jacking pipe underpass road construction, comprising a fixing and a settlement monitoring mechanism, wherein the settlement monitoring mechanism comprises an embedded block, a sphere, a permanent magnet, a track, a detection platform, a gravity sensing sheet and an electromagnet, wherein the embedded block is embedded in a soil layer, a ball groove is arranged in the embedded block, a sphere is rotatably arranged in the ball groove, a permanent magnet is embedded in the sphere, the track is horizontally arranged in a tunnel, and the track is connected to an inner side wall of the tunnel through a fixing, a detection platform is slidably connected to the track, a gravity sensing sheet is arranged on the detection platform, and an electromagnet is arranged above the gravity sensing sheet.

[0006] In a preferred technical solution of the present invention, the sphere is formed by splicing a hollow hemisphere and a solid hemisphere, the permanent magnet is arranged on the inner side of the hollow hemisphere, and the permanent magnet is fixedly connected to the solid hemisphere.

[0007] In a preferred technical solution of the present invention, the fixing device includes a base point, a support rod and a mounting frame. The base point is embedded in the inner wall of the tunnel which is not affected by settlement. One end of the support rod is connected to the base point, and the other end of the support rod extends into the tunnel and is connected to the mounting frame. The track is fixed on the mounting frame.

[0008] In a preferred technical solution of the present invention, the detection platform includes an upper baffle, a lower baffle, a leveling assembly and a spirit level. The upper baffle is arranged parallel to the lower baffle, and the gravity sensing sheet is fixed on the upper baffle. A leveling assembly is arranged between the upper baffle and the lower baffle, which can level the upper baffle. A spirit level is also arranged on the upper baffle.

[0009] In a preferred technical solution of the present invention, the leveling assembly includes an articulated seat, a threaded shaft and a threaded sleeve. An articulated seat is provided at the four corners of the bottom of the upper baffle plate. The top end of the threaded shaft is hinged to the articulated seat, the bottom end of the threaded shaft is threadedly connected to the threaded sleeve, the bottom end of the threaded sleeve is rotatably connected to the lower baffle plate, and an anti-slip pattern is provided on the outer wall of the threaded sleeve.

[0010] In a preferred technical solution of the present invention, reflective marking points are also provided on the track.

[0011] The present invention also provides a method for using a safety and stability control device for large-section pipe jacking underpass road construction, comprising the following steps: Step 1: embed the embedded block into the soil layer at the bottom of the tunnel, and set a reflective marking point on the track to mark the position of the embedded block; Step 2: Move the detection platform to the reflective mark point, then energize the electromagnet, and use the mutual adsorption of the permanent magnet and the electromagnet to squeeze the gravity sensing sheet; Step 3: Record the pressure on the gravity sensing sheet through a data acquisition terminal connected to the gravity sensing sheet, and then obtain the distance between the permanent magnet and the electromagnet; Step 4: By calculating the distance that the permanent magnet sinks, the depth of soil settlement can be obtained. When the depth of soil settlement exceeds the safe range, construction work is stopped immediately to ensure construction safety.

[0012] In a preferred technical solution of the present invention, in step two, after the detection platform moves to the reflective marking point, the top surface of the upper baffle is leveled by the leveling assembly until the small bubble in the spirit level is centered within the red circle, thereby ensuring that the gravity sensor and the electromagnet are in a horizontal state.

[0013] In a preferred technical solution of the present invention, in step three, the data collection terminal is a PC or a mobile phone.

[0014] The beneficial effects of the present invention are: The safety and stability control device and use method for large-section jacking pipe underpass road construction proposed by the present invention can accurately measure the settlement depth of the soil layer through the cooperation of structures such as permanent magnets, electromagnets and gravity sensing sheets to guide construction operations, and when the embedded block is skewed during the settlement process, the sphere can produce adaptive rolling to keep the permanent magnet in a horizontal state at all times, thereby ensuring the accuracy of the detection result. The detection platform is fixed on the inner side wall of the tunnel that is not affected by the settlement, which can ensure that the height of the electromagnet remains unchanged at all times. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a safety and stability control device for large-section pipe jacking underpass road construction provided by a specific embodiment of the present invention; Figure 2 yes Figure 1 A partial enlarged view of the middle A; Figure 3 It is a schematic diagram of the internal structure of the prefabricated block.

[0016] In the figure: 1. Fixing parts; 11. Base point; 12. Support rod; 13. Mounting frame; 2. Settlement monitoring mechanism; 21. Embedded block; 211. Ball groove; 22. Sphere; 221. Hollow hemisphere; 222. Solid hemisphere; 23. Permanent magnet; 24. Track; 25. Detection platform; 251. Upper baffle; 252. Lower baffle; 253. Level; 254. Articulated seat; 255. Threaded shaft; 256. Threaded sleeve; 257. Anti-slip pattern; 26. Gravity sensor; 27. Electromagnet; 28. Reflective marking point. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0018] like Figure 1-3As shown, in the embodiment, a safety and stability control device for large-section jacking pipe underpass road construction is provided, including a fixing member 1 and a settlement monitoring mechanism 2, the settlement monitoring mechanism 2 including an embedded block 21, a sphere 22, a permanent magnet 23, a track 24, a detection platform 25, a gravity sensing sheet 26 and an electromagnet 27, the embedded block 21 is embedded in the soil layer, a ball groove 211 is provided in the embedded block 21, a sphere 22 is rollingly arranged in the ball groove 211, a permanent magnet 23 is embedded in the sphere 22, the track 24 is horizontally arranged in the tunnel, and the track 24 is connected to the inner wall of the tunnel through the fixing member 1, the detection platform 25 is slidably connected to the track 24, the detection platform 25 is provided with a gravity sensing sheet 26, and an electromagnet 27 is provided above the gravity sensing sheet 26. In this embodiment, the fixing member 1 is used to support the track 24, so that it is suspended above the embedded block 21, so that when the soil layer at the bottom of the tunnel settles, the position height of the track 24 will not be affected, which helps to improve the accuracy of the detection result. The settlement monitoring mechanism 2 is used to monitor the depth and speed of soil settlement, and can judge whether the construction work is safe according to the depth and speed of soil settlement. The embedded block 21 and the sphere 22 are made of engineering plastic materials, which can withstand the extrusion force from the soil layer. When the soil layer settles, it can drive the embedded block 21 to move down synchronously. When the embedded block 21 is skewed due to uneven settlement or non-vertical settlement of the soil layer, the sphere 22 can roll adaptively in the ball groove 211, so that the permanent magnet 23 is always arranged horizontally. The detection platform 25 The top surface of the electromagnet 27 is a plane, and the electromagnet 27 is a disc-shaped structure and is horizontally installed on the detection platform 25. The size of the electromagnet 27 should be larger than the size of the embedded block 21; when the electromagnet 27 is energized, it will generate magnetism, and then attract the permanent magnet 23 and squeeze the gravity sensing sheet 26. The gravity sensing sheet 26 can detect the pressure value it is subjected to. Since the suction force of the magnet is inversely proportional to the square of the distance between the magnet and the object, the distance between the permanent magnet 23 and the electromagnet 27 can be calculated according to the pressure value, and the settlement of the embedded block 21 can be calculated. In addition, the fixing part 1, the track 24 and the detection platform 25 are also made of non-magnetic materials such as engineering plastics.

[0019] Specifically, the sphere 22 is composed of a hollow hemisphere 221 and a solid hemisphere 222, and the permanent magnet 23 is disposed on the inner side of the hollow hemisphere 221, and the permanent magnet 23 is fixedly connected to the solid hemisphere 222. In this embodiment, the solid hemisphere 222 and the hollow hemisphere 221 are connected by threads. Since the mass of the hollow hemisphere 221 is less than the mass of the solid hemisphere 222, the hollow hemisphere 221 is always located directly above the solid hemisphere 222 during the rolling process of the sphere 22 relative to the ball groove 211.

[0020] Specifically, the fixing member 1 includes a base point 11, a support rod 12 and a mounting frame 13. The base point 11 is embedded in the inner wall of the tunnel that is not affected by the settlement. One end of the support rod 12 is connected to the base point 11, and the other end of the support rod 12 extends into the tunnel and is connected to the mounting frame 13. The track 24 is fixed on the mounting frame 13. In this embodiment, since the inner wall of the tunnel is not affected by the settlement, when the soil layer at the bottom of the tunnel settles, the height of the base point 11 will not change, thereby ensuring the detection accuracy of the settlement monitoring mechanism 2. The support rod 12 is arranged horizontally to support the mounting frame 13 so that it is suspended in the tunnel. The track 24 is detachably mounted on the bottom of the mounting frame 13 using fastening bolts, and the track 24 is arranged horizontally.

[0021] Specifically, the detection platform 25 includes an upper baffle 251, a lower baffle 252, a leveling assembly and a spirit level 253. The upper baffle 251 is arranged parallel to the upper baffle 252, and the gravity sensing sheet 26 is fixed on the upper baffle 251. A leveling assembly is arranged between the upper baffle 251 and the lower baffle 252, which can level the upper baffle 251. The upper baffle 251 is also provided with a spirit level 253. In this embodiment, the upper baffle 251 and the lower baffle 252 are both flat plate structures, and the leveling assembly can fine-tune the upper baffle 251 to ensure that its top surface always remains horizontal. A red circle is arranged in the middle of the spirit level 253. When the bubble is completely located in the red circle, it means that the spirit level 253 is in a horizontal state. The leveling assembly and the spirit level 253 cooperate with each other to achieve the purpose of rapid leveling.

[0022] Specifically, the leveling assembly includes an articulated seat 254, a threaded shaft 255 and a threaded sleeve 256. The four corners of the bottom of the upper baffle 251 are provided with an articulated seat 254. The top of the threaded shaft 255 is articulated with the articulated seat 254. The bottom of the threaded shaft 255 is threadedly connected with the threaded sleeve 256. The bottom of the threaded sleeve 256 is rotatably connected to the lower baffle 252. The outer wall of the threaded sleeve 256 is provided with an anti-slip pattern 257. In this embodiment, there are four articulated seats 254, and the four articulated seats 254 are evenly arranged at the bottom of the upper baffle 251. The threaded sleeve 256 is vertically arranged on the lower baffle 252, and when the threaded sleeve 256 is rotated, the threaded shaft 255 can be driven to move upward, thereby lifting one corner of the upper baffle 251. Through the cooperation of the four threaded sleeves 256, the purpose of fine-tuning the horizontality of the upper baffle 251 can be achieved. The anti-skid pattern 257 can increase the friction force of the outer wall of the threaded sleeve 256 to prevent slipping when the threaded sleeve 256 is screwed.

[0023] Specifically, a reflective marking point 28 is also provided on the track 24. In this embodiment, the reflective marking point 28 is used to mark the embedded position of the embedded block 21, so that the staff can quickly move the electromagnet 27 to the top of the embedded block 21.

[0024] This embodiment also provides a method for using a safety and stability control device for large-section pipe jacking underpass road construction, comprising the following steps: Step 1: embed the embedded block 21 in the soil layer at the bottom of the tunnel, embed the fixing member 1 in the soil layer of the side wall of the tunnel, install the track 24 on the fixing member 1, and set a reflective marking point 28 on the track 24 to mark the position of the embedded block 21; Step 2: Move the detection platform 25 to the reflective mark point 28, and then energize the electromagnet 27. After the electromagnet 27 is energized, it generates magnetic force, and utilizes the mutual adsorption of the permanent magnet 23 and the electromagnet 27 to squeeze the gravity sensing sheet 26; Step 3: Record the pressure on the gravity sensing sheet 26 through a data acquisition terminal connected to the gravity sensing sheet 26, and compare the value with the data of the adsorption force between the permanent magnet 23 and the electromagnet 27 varying with the distance measured in the laboratory, thereby obtaining the distance between the permanent magnet 23 and the electromagnet 27; Step 4: By calculating the distance that the permanent magnet 23 sinks, the depth of soil settlement can be obtained. When the depth of soil settlement exceeds the safe range, the construction work is stopped immediately to ensure construction safety.

[0025] Specifically, in step 2, after the detection platform 25 moves to the reflective marking point 28, the top surface of the upper baffle 251 is leveled by the leveling assembly. During leveling, the threaded sleeve 256 is rotated, and the threaded sleeve 256 rotates to drive the threaded shaft 255 to move upward, thereby pushing the corners of the upper baffle 251 to lift until the small bubble in the spirit level 253 is centered within the red circle, thereby ensuring that the gravity sensor 26 and the electromagnet 27 are both in a horizontal state.

[0026] Specifically, in step three, the data collection terminal is a PC or a mobile phone.

[0027] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A safety and stability control device for large-section pipe jacking under road construction, comprising a fixing member (1) and a settlement monitoring mechanism (2), characterized in that: The settlement monitoring mechanism (2) comprises an embedded block (21), a sphere (22), a permanent magnet (23), a track (24), a detection platform (25), a gravity sensing sheet (26) and an electromagnet (27). The embedded block (21) is embedded in the soil layer. A ball groove (211) is provided in the embedded block (21). A sphere (22) is rotatably provided in the ball groove (211). The sphere (22) is embedded with a permanent magnet (23). The track (24) is horizontally provided in the tunnel. The track (24) is connected to the inner wall of the tunnel through a fixing member (1). The detection platform (25) is slidably connected to the track (24). The detection platform (25) is provided with a gravity sensing sheet (26), and an electromagnet (27) is provided above the gravity sensing sheet (26).

2. The safety and stability control device for large-section pipe jacking under road construction according to claim 1 is characterized by: The sphere (22) is formed by splicing a hollow hemisphere (221) and a solid hemisphere (222); the permanent magnet (23) is arranged on the inner side of the hollow hemisphere (221), and the permanent magnet (23) is fixedly connected to the solid hemisphere (222).

3. The safety and stability control device for large-section pipe jacking under road construction according to claim 1 is characterized by: The fixing member (1) comprises a base point (11), a support rod (12) and a mounting frame (13); the base point (11) is embedded in an inner wall of a tunnel not affected by settlement; one end of the support rod (12) is connected to the base point (11); the other end of the support rod (12) extends into the tunnel and is connected to the mounting frame (13); the track (24) is fixedly mounted on the mounting frame (13).

4. The safety and stability control device for large-section pipe jacking under road construction according to claim 1 is characterized by: The detection platform (25) comprises an upper baffle (251), a lower baffle (252), a leveling assembly and a spirit level (253); the upper baffle (251) is arranged parallel to the upper part of the lower baffle (252); the gravity sensing sheet (26) is fixedly mounted on the upper baffle (251); a leveling assembly is arranged between the upper baffle (251) and the lower baffle (252) to level the upper baffle (251); and a spirit level (253) is also arranged on the upper baffle (251).

5. The safety and stability control device for large-section pipe jacking under road construction according to claim 4 is characterized by: The leveling assembly comprises an articulated seat (254), a threaded shaft (255) and a threaded sleeve (256); the four corners of the bottom of the upper baffle (251) are each provided with an articulated seat (254); the top end of the threaded shaft (255) is articulated with the articulated seat (254); the bottom end of the threaded shaft (255) is threadedly connected with the threaded sleeve (256); the bottom end of the threaded sleeve (256) is rotatably connected to the lower baffle (252); and an anti-slip pattern (257) is provided on the outer wall of the threaded sleeve (256).

6. The safety and stability control device for large-section pipe jacking under road construction according to claim 1 is characterized by: Reflective marking points (28) are also provided on the track (24).

7. A method for using the safety and stability control device for large-section pipe jacking under road construction according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: embed the embedded block (21) into the soil layer at the bottom of the tunnel, and set a reflective marking point (28) on the track (24) to mark the position of the embedded block (21); Step 2: Move the detection platform (25) to the reflective marking point (28), then energize the electromagnet (27), and utilize the mutual adsorption of the permanent magnet (23) and the electromagnet (27) to squeeze the gravity sensing sheet (26); Step 3: Record the pressure exerted on the gravity sensing sheet (26) through a data acquisition terminal connected to the gravity sensing sheet (26), thereby obtaining the distance between the permanent magnet (23) and the electromagnet (27); Step 4: By calculating the distance that the permanent magnet (23) sinks, the depth of soil settlement can be obtained. When the depth of soil settlement exceeds the safe range, the construction work is stopped immediately to ensure construction safety.

8. The method for using the safety and stability control device for large-section pipe jacking under road construction according to claim 7 is characterized by: In step 2, after the detection platform (25) moves to the reflective marking point (28), the top surface of the upper baffle (251) is leveled by the leveling assembly until the small bubble in the level (253) is centered within the red circle, thereby ensuring that the gravity sensor (26) and the electromagnet (27) are both in a horizontal state.

9. The method for using the safety and stability control device for large-section pipe jacking under road construction according to claim 7 is characterized by: In step three, the data collection terminal is a PC or a mobile phone.

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