Subway foundation pit construction collapse danger automatic monitoring and early warning device

Abstract

The invention discloses a subway foundation pit construction collapse danger automatic monitoring and early warning device, and relates to the technical field of subway tunnel construction.The subway foundation pit construction collapse danger automatic monitoring and early warning device comprises a fixing frame and a testing assembly used for testing the deformation degree of the top of a foundation pit; and the supporting assembly is used for supporting the testing belt so as to ensure that the testing belt is attached to the foundation pit supporting structure. According to the subway foundation pit construction collapse danger automatic monitoring and early warning device, the length of the testing belt can be adjusted, the working direction of the testing belt is in the length direction of the foundation pit, the coverage range is large, multiple monitoring devices can be arranged at the same time in the construction process, all-around coverage monitoring can be conducted on the top wall of the foundation pit, and therefore the vacuum period is avoided, and the construction efficiency is improved. Therefore, the purpose of guaranteeing construction safety is achieved. In the monitoring process, the collapse early warning and bending point searching functions are achieved at the same time, a construction unit can make a response in time, the problem can be found out in time, and then the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of subway tunnel construction, and in particular to an automatic monitoring and early warning device for collapse danger in subway foundation pit construction. Background Art

[0002] In recent years, in order to effectively solve the pressure problem of urban transportation network and improve the utilization efficiency of land resources, a large number of subway projects have been built in various regions of my country, bringing many conveniences to people's lives. It not only effectively alleviates the traffic pressure in the city, but also provides good convenience for people's lives. However, because the construction of subway projects is carried out in underground space, and the workload of engineering construction is relatively huge, many dangerous situations are often encountered during the construction process, so the construction unit will use professional monitoring and early warning equipment to avoid danger.

[0003] When monitoring the risk of collapse during subway foundation pit construction, the monitoring device generally monitors the displacement of the foundation pit support structure in real time. When the displacement exceeds a certain value, the monitoring device will sound an alarm. However, existing monitoring devices are generally installed at a certain distance, resulting in a vacuum period in the monitoring range. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The technical problem to be solved by the present invention is to provide an automatic monitoring and early warning device for collapse risk in subway foundation pit construction in view of the above-mentioned defects of the prior art, which can cover the foundation pit over a long distance when in use to reduce the monitoring vacuum.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic monitoring and early warning device for collapse danger in subway foundation pit construction, comprising a fixed frame, which is fixed to the top of the foundation pit support structure when in use, a rotating shaft is arranged at the bottom of the fixed frame, a test belt is fixed and wound on the side of the rotating shaft, sliding grooves are arranged on both sides of the test belt, and the starting end of the test belt is fixed to the inner wall of the foundation pit support structure by bolts, and The test assembly is used to test the deformation degree of the top of the foundation pit, and includes a walking member arranged on the side of the test belt, an alarm member and a closing member arranged on the side of the rotating shaft of the fixed frame, and the alarm member and the closing member are respectively arranged on both sides of the test belt; The support assembly is used to support the test belt to ensure that the test belt fits the foundation pit support structure, and includes a lifting piece arranged on the lower side of the test belt and an adsorption piece arranged on the top of the test belt.

[0007] As a preferred embodiment of the automatic monitoring and early warning device for collapse hazards in subway foundation pit construction described in the present invention, the walking parts include an outer frame, rotating wheels, transmission gears, a driving motor, a rotating plate, a slide rail, a sliding plate, a spring and a laser rangefinder. The outer frame is arranged on both sides of the test belt, and a pair of rotating wheels are rotatably arranged at the ends of both sides of the outer frame. Each transmission gear is fixedly arranged at the end of the rotating wheel, and the two transmission gears on each side of the outer frame are meshed. The output end of the driving motor is fixedly connected to the side of one of the transmission gears. The driving motor is fixedly arranged on the side of the outer frame through a bracket, and the rotating wheels on each side of the outer frame respectively clamp the side of the sliding groove.

[0008] As a preferred solution of the automatic monitoring and early warning device for collapse hazards in subway foundation pit construction described in the present invention, wherein: the rotating plate is rotatably set at the bottom of the inner wall of the outer frame, the sliding rail is located at one end of the rotating plate and fixedly set at the bottom of the inner wall of the outer frame, the sliding plate is slidably set on the inner side of the sliding rail, the two ends of the spring are respectively fixedly set on the side of the sliding plate and the side of the sliding rail, the end of the rotating plate close to the sliding rail is slidably matched with the side of the sliding plate, and the end of the rotating plate away from the sliding plate is slidably matched with the bottom of the test strip, and the laser rangefinder is fixedly set at the bottom of the inner wall of the outer frame, and the laser rangefinder is opposite to the sliding plate and can measure the moving distance of the sliding plate.

[0009] As a preferred embodiment of the automatic monitoring and early warning device for collapse hazards in subway foundation pit construction described in the present invention, the alarm component includes an adjustment plate, a first connector, a fixed ring, a movable ring, a follower ring, a second connector, a roller, a threaded cylinder, a second spring, an adjustment cylinder and a rubber ring; the adjustment plate is rotatably arranged on the side of the fixed frame; the adjustment plate and the fixed frame are connected by bolts; the rotation center of the adjustment plate coincides with the rotation center of the rotating shaft; a pointer is fixedly arranged on the side of the adjustment plate; a scale is arranged on the side of the fixed frame; the adjustment plate can adjust the rotation angle according to the scale and pointer on the side of the fixed frame; and the first connector is fixedly arranged on the side of the adjustment plate.

[0010] As a preferred solution of the automatic monitoring and early warning device for collapse hazards in subway foundation pit construction described in the present invention, wherein: the fixed ring is sleeved and fixedly arranged on the end of the rotating shaft, the movable ring is sleeved and slidably arranged on the side of the rotating shaft, the follower ring is coaxially arranged with the rotating shaft and is located between the fixed ring and the movable ring, the second connector is fixedly arranged on the side of the follower ring, the roller is rollingly arranged between the follower ring and the rotating shaft, the threaded cylinder is sleeved and fixedly arranged on the side of the rotating shaft, the second spring is wrapped around the side of the rotating shaft, the two ends of the second spring are respectively fixedly arranged on the side of the moving ring and the side of the threaded cylinder, the adjusting cylinder is sleeved and threadedly connected to the side of the threaded cylinder, and the end of the adjusting cylinder abuts against the side of the moving ring.

[0011] As a preferred solution of the automatic monitoring and early warning device for collapse hazard in subway foundation pit construction described in the present invention, the rubber ring is fixedly arranged on the side of the moving ring close to the roller, and the rubber ring is arranged in two layers along the radial direction of the moving ring, one layer of the rubber ring is facing the end of the roller, and the other layer of the rubber ring is facing the side of the follower ring.

[0012] As a preferred embodiment of the automatic monitoring and early warning device for collapse hazards in subway foundation pit construction described in the present invention, the restraining part includes a spring three, a moving ring, an adjusting ring, a limit column and a limit hole. The spring three is wrapped around the end of the rotating shaft away from the alarm part. The moving ring is sleeved and slidably arranged on the side of the rotating shaft. The two ends of the spring three are respectively fixed on the side of the moving ring and the side of the rotating shaft. The adjusting ring is sleeved and slidably arranged on the side of the moving ring. A plurality of limit columns are arranged and fixedly arranged on the side of the adjusting ring away from the spring three. The limit hole is opened on the inner side of the fixed frame at a position opposite to the adjusting ring. The number of the limit holes is equal to the number of the limit columns and the spacing positions are the same.

[0013] As a preferred embodiment of the automatic monitoring and early warning device for collapse hazards in subway foundation pit construction described in the present invention, the lifting member includes a spring push rod, a push column, a fixed seat, a top frame, a spring four, a fixed column, a positioning groove and a positioning column. The spring push rod is provided with a pair and is fixedly arranged on the top of the inner wall of the fixed frame. The push column is fixedly arranged on the side of the output end of the spring push rod. The fixed seat is fixedly arranged on the inner side of the fixed frame. The side of the top frame is rotatably arranged on the inner side of the fixed seat. The spring four is located on the inner side of the fixed seat. One end of the spring four is fixedly arranged on the side of the top frame, and the other end abuts against the inner side of the fixed seat. The fixed column is fixedly arranged on the inner side of the fixed frame. The positioning groove is opened on the end face of the fixed column. The positioning column is fixedly arranged on the side of the top frame away from the fixed seat, and the positioning column is slidably arranged on the inner side of the positioning groove.

[0014] As a preferred embodiment of the automatic monitoring and early warning device for collapse hazards in subway foundation pit construction described in the present invention, the adsorption component includes a sliding buckle, a support plate, a sliding rod, a convex plate, a spring five, a magnetic block one, a fixed screw and a magnetic block two. The sliding buckle is slidably set on the side of the test belt, the bottom of the support plate is slidably set on the inner side of the sliding groove, the side of the support plate abuts against the side of the sliding buckle, the sliding rod is fixedly set on the side of the support plate, the convex plate is fixedly set on the top of the sliding buckle, the end of the sliding rod away from the support plate penetrates and is slidably set on the side of the convex plate, and the two ends of the spring five are respectively fixed on the end face of the sliding rod and the side of the convex plate.

[0015] As a preferred solution of the automatic monitoring and early warning device for collapse hazard in subway foundation pit construction described in the present invention, the first magnetic block is fixedly arranged on the top of the sliding buckle, the second magnetic block is fixedly arranged on the bottom of the fixing screw, and the fixing screw is located directly above the sliding buckle and is threadedly connected to the supporting structure when in use.

[0016] The beneficial effects of the present invention are as follows: the test belt of the automatic monitoring and early warning device for collapse danger in subway foundation pit construction can be adjusted in length, and its working direction is along the length direction of the foundation pit, with a large coverage range. During construction, multiple monitoring devices can be set up at the same time, so that the top wall of the foundation pit can be fully covered and monitored, thereby avoiding the occurrence of a vacuum period, and thus achieving the purpose of ensuring construction safety. During monitoring, the present invention simultaneously realizes the dual functions of collapse early warning and finding bending points, which can not only enable the construction unit to respond in time, but also find out the problem in time, thereby improving the efficiency of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the automatic monitoring and early warning device for collapse danger in subway foundation pit construction of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the walking member of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the fixing frame of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the constricting member of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the alarm component of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the follower coil of the present invention.

[0024] Figure 7 It is a schematic diagram of the lifting member structure of the present invention.

[0025] Figure 8 It is a schematic diagram of the structure of the adsorption member of the present invention.

[0026] Reference numerals: 100, fixed frame; 200, rotating shaft; 300, test belt; 400, sliding groove; 500, test assembly; 501, walking member; 501a, outer frame; 501b, rotating wheel; 501c, transmission gear; 501d, driving motor; 501e, rotating plate; 501f, slide rail; 501g, sliding plate; 501h, spring one; 501i, laser rangefinder; 502, alarm member; 502a, adjustment plate; 502b, connector one; 502c, fixed ring; 502d, moving ring; 502e, follow-up ring; 502f, connector two; 502g, roller; 502h, threaded cylinder; 502i, spring two; 502j, Adjusting cylinder; 502k, rubber ring; 503, tightening piece; 503a, spring three; 503b, moving ring; 503c, adjusting ring; 503d, limiting column; 503e, limiting hole; 600, supporting assembly; 601, lifting piece; 601a, spring push rod; 601b, lifting column; 601c, fixing seat; 601d, lifting frame; 601e, spring four; 601f, fixing column; 601g, positioning groove; 601h, positioning column; 602, adsorption piece; 602a, sliding buckle; 602b, abutment plate; 602c, sliding rod; 602d, convex plate; 602e, spring five; 602f, magnetic block one; 602g, fixing screw; 602h, magnetic block two. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] Example 1 Reference Figure 1 , which is the first embodiment of the present invention, provides an automatic monitoring and early warning device for collapse danger in subway foundation pit construction, comprising: A fixing frame 100, which is fixed to the top of the foundation pit support structure when in use, a rotating shaft 200 is provided at the bottom of the fixing frame 100, a test tape 300 is fixed and wound on the side of the rotating shaft 200, a sliding groove 400 is provided on both sides of the test tape 300, and the starting end of the test tape 300 is fixed to the inner wall of the foundation pit support structure by bolts, and The test assembly 500 is used to test the deformation degree of the top of the foundation pit, and includes a walking member 501 arranged on the side of the test belt 300, an alarm member 502 and a closing member 503 arranged on the side of the rotating shaft 200 of the fixing frame 100, and the alarm member 502 and the closing member 503 are respectively arranged on both sides of the test belt 300; The support assembly 600 is used to support the test tape 300 to ensure that the test tape 300 fits the foundation pit support structure, and includes a lifting member 601 arranged on the lower side of the test tape 300 and an adsorption member 602 arranged on the top of the test tape 300.

[0032] During use: When detecting the risk of foundation pit collapse, the fixing frame 100 is fixed to the wall of the supporting structure by bolts, and then the wound test tape 300 is pulled out until the test tape 300 covers a suitable length in the foundation pit, and the end of the test tape 300 away from the fixing frame 100 is fixed to the wall of the supporting structure by bolts.

[0033] In the test assembly 500, the walking part 501 can move and detect the bending of the support structure in real time, and the alarm part 502 is triggered by the test belt 300 to sound an alarm after the foundation pit is bent to a certain extent. The tightening part 503 is used to tighten the test belt 300, so as to realize the sensitivity of the test belt 300 to avoid bending of the foundation pit; in the support assembly 600, the lifting part 601 mainly lifts the test belt 300 at the starting point, and the adsorption part 602 uses magnetic force to absorb the middle part of the test belt 300, thereby ensuring that the test belt 300 is in close contact with the foundation pit support structure.

[0034] Example 2 Reference Figure 2~Figure 6 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the walking member 501 includes an outer frame 501a, a rotating wheel 501b, a transmission gear 501c, a driving motor 501d, a rotating plate 501e, a slide rail 501f, a sliding plate 501g, a spring 501h and a laser rangefinder 501i. The outer frame 501a is arranged on both sides of the test strip 300. A pair of rotating wheels 501b are rotatably arranged at the ends of both sides of the outer frame 501a. Each transmission gear 501c is fixedly arranged at the end of the rotating wheel 501b. The two transmission gears 501c on each side of the outer frame 501a are meshed. The output end of the driving motor 501d is fixedly connected to the side of one of the transmission gears 501c. The driving motor 501d is fixedly arranged on the side of the outer frame 501a through a bracket. The rotating wheels 501b on each side of the outer frame 501a respectively clamp the side of the sliding groove 400.

[0035] The rotating plate 501e is rotatably set at the bottom of the inner wall of the outer frame 501a, the slide rail 501f is located at one end of the rotating plate 501e and fixedly set at the bottom of the inner wall of the outer frame 501a, the sliding plate 501g is slidably set on the inner side of the slide rail 501f, the two ends of the spring 501h are respectively fixedly set on the side of the sliding plate 501g and the side of the slide rail 501f, the end of the rotating plate 501e close to the slide rail 501f is slidably matched with the side of the sliding plate 501g, and the end of the rotating plate 501e away from the sliding plate 501g is slidably matched with the bottom of the test strip 300, and the laser rangefinder 501i is fixedly set at the bottom of the inner wall of the outer frame 501a, and the laser rangefinder 501i is opposite to the sliding plate 501g and can measure the moving distance of the sliding plate 501g.

[0036] The outer frame 501a is connected to the test strip 300 by the clamping of the rotating wheel 501b, and the walking member 501 can move at the bottom of the test strip 300 by driving the rotating wheel 501b through the driving motor 501d.

[0037] The alarm component 502 includes an adjustment plate 502a, a connector 1 502b, a fixed ring 502c, a movable ring 502d, a follower ring 502e, a connector 2 502f, a roller 502g, a threaded tube 502h, a spring 2 502i, an adjustment tube 502j and a rubber ring 502k. The adjustment plate 502a is rotatably set on the side of the fixed frame 100. The adjustment plate 502a and the fixed frame 100 are connected by bolts. The rotation center of the adjustment plate 502a coincides with the rotation center of the rotating shaft 200. A pointer is fixedly set on the side of the adjustment plate 502a. A scale is set on the side of the fixed frame 100. The adjustment plate 502a can adjust the rotation angle according to the scale and pointer on the side of the fixed frame 100. The connector 1 502b is fixedly set on the side of the adjustment plate 502a.

[0038] The connector 1 502b and the connector 2 502f are respectively connected to switches connected to the alarm. When the two are in contact and conductive, the alarm will sound.

[0039] The fixed ring 502c is sleeved and fixedly set on the end of the rotating shaft 200, the movable ring 502d is sleeved and slidably set on the side of the rotating shaft 200, the follower ring 502e is coaxially set with the rotating shaft 200 and is located between the fixed ring 502c and the movable ring 502d, the second connector 502f is fixedly set on the side of the follower ring 502e, the roller 502g is rollingly set between the follower ring 502e and the rotating shaft 200, the threaded tube 502h is sleeved and fixedly set on the side of the rotating shaft 200, the second spring 502i is surrounded by the side of the rotating shaft 200, and the two ends of the second spring 502i are respectively fixedly set on the side of the movable ring 502d and the side of the threaded tube 502h, the adjusting tube 502j is sleeved and threadedly connected to the side of the threaded tube 502h, and the end of the adjusting tube 502j abuts against the side of the movable ring 502d.

[0040] The rubber ring 502k is fixedly arranged on one side of the moving ring 502d close to the roller 502g. The rubber ring 502k has two layers along the radial direction of the moving ring 502d. One layer of the rubber ring 502k faces the end of the roller 502g, and the other layer of the rubber ring 502k faces the side of the follower ring 502e.

[0041] The closing member 503 includes a spring three 503a, a moving ring 503b, an adjusting ring 503c, a limiting column 503d and a limiting hole 503e. The spring three 503a is wrapped around the end of the rotating shaft 200 away from the alarm member 502. The moving ring 503b is sleeved and slidably set on the side of the rotating shaft 200. The two ends of the spring three 503a are respectively fixed on the side of the moving ring 503b and the side of the rotating shaft 200. The adjusting ring 503c is sleeved and slidably set on the side of the moving ring 503b. A plurality of limiting columns 503d are provided and fixedly set on the side of the adjusting ring 503c away from the spring three 503a. The limiting hole 503e is opened on the inner side of the fixing frame 100 opposite to the adjusting ring 503c. The number of limiting holes 503e is equal to the number of limiting columns 503d and the spacing positions are the same.

[0042] Among them, spring two 502i is connected to the moving ring 502d, and pulls the moving ring 502d toward the side away from the roller 502g. Spring three 503a is connected to the moving ring 503b and is in a natural state when not working, which can just ensure that the limit column 503d and the limit hole 503e maintain a certain distance.

[0043] When in use: The support structure is installed after the foundation pit is excavated. During the construction of the subway project, the foundation pit is in danger of collapse due to the force, and the support structure before collapse will be formed due to the pressure of the foundation pit soil. This equipment is installed on the inner side of the support structure and warns of the collapse risk by detecting the degree of bending of the support mechanism.

[0044] During monitoring, the test belt 300 is first pulled out and fixed on the supporting structure avoidance surface at the top of the foundation pit, and then the test belt 300 is tightened by the tightening member 503. First, the adjusting ring 503c is slid to drive the limiting column 503d close to the limiting hole 503e. After the limiting column 503d abuts against the inner wall of the fixing frame 100, the moving ring 503b is rotated. The moving ring 503b drives the rotating shaft 200 to rotate through the spring three 503a and pulls the test belt 300 to a tight state, and then the limiting column 503d is inserted into the limiting hole 503e. In this state, the moving ring 503b cannot rotate at will, and the spring three 503a is in a tight state. Its main purpose is to keep the test belt 300 in a tight state, so that it can be stretched straight, so as to make a sensitive response to the bending of the supporting structure.

[0045] When the test tape 300 is pulled, the rotating shaft 200 will continue to rotate. At this time, it is necessary to maintain the distance between the moving ring 502d and the roller 502g, so that the follow-up ring 502e and the connecting head 2 502f can always be vertically downward under the action of gravity, and the roller 502g reduces the friction between the follow-up ring 502e and the rotating shaft 200 to prevent the follow-up ring 502e from following the rotation during the rapid rotation of the rotating shaft 200. After the test tape 300 is installed, the follow-up ring 502e needs to keep following the rotation shaft 200. At this time, the adjusting cylinder 502j is rotated so that the adjusting cylinder 502j squeezes the moving ring 502d toward the side away from the threaded cylinder 502h. The moving ring 502d overcomes the elastic force of the second spring 502i under the pushing of the adjusting cylinder 502j and moves toward the follow-up ring 502e. Finally, the rubber ring 502k on its side squeezes the side of the follow-up ring 502e and the side of the roller 502g at the same time, fixing the follow-up ring 502e and the roller 502g at the same time. At this time, the follow-up ring 502e and the connecting head 2 502f achieve following the rotation shaft 200.

[0046] If the test strip 300 bends beyond the normal range, the test strip 300 will be pulled and overcome the torsional force of spring three 503a to drive the shaft 200 to rotate. When the bending exceeds the normal range, the shaft 200 will drive the follower coil 502e and connector two 502f to rotate and finally abut against connector one 502b, thereby triggering the alarm.

[0047] Among them, the walking member 501 can walk along the test belt 300 and find out the specific bending place, so as to facilitate the construction unit to respond to the danger in time. First, the driving motor 501d drives the transmission gear 501c to rotate, and the transmission gears 501c transmit each other, thereby driving the rotation of the rotating wheel 501b, and finally driving the outer frame 501a to move along the test belt 300. During the movement, the rotating plate 501e always contacts the bottom of the test belt 300, and can make a timely response to the concave and convex changes on the surface of the test belt 300. When the test belt 300 is obviously protruding toward the ground due to the pressure of the supporting structure, the rotating plate 501e will rotate greatly, and the starting end will also cause the sliding plate 501g to move. The movement of the sliding plate 501g will be detected in real time by the laser rangefinder 501i. When the distance between the sliding plate 501g and the laser rangefinder 501i is too large, the driving motor 501d will stop rotating, and at this time, the place where the outer frame 501a stops is the approximate maximum bending point.

[0048] In the above monitoring process, the test strip 300 can be adjusted in length, and its working direction is along the length direction of the foundation pit, with a large coverage range. If multiple detection devices are set at the same time, the top wall of the foundation pit can be fully covered and monitored, thereby avoiding the vacuum period and achieving the purpose of ensuring construction safety. In addition, during monitoring, the present invention simultaneously achieves the dual functions of collapse warning and finding bending points, which can not only enable the construction unit to respond in time, but also find out the problem in time, thereby improving the efficiency of construction.

[0049] The remaining structures are the same as those of Example 1.

[0050] Example 3 Reference Figure 4~Figure 8 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the lifting member 601 includes a spring push rod 601a, a top column 601b, a fixed seat 601c, a top frame 601d, a spring four 601e, a fixed column 601f, a positioning groove 601g and a positioning column 601h. The spring push rod 601a is provided with a pair and fixedly set on the top of the inner wall of the fixing frame 100, the top column 601b is fixedly set on the side of the output end of the spring push rod 601a, the fixed seat 601c is fixedly set on the inner side of the fixing frame 100, and the top frame The side of 601d is rotatably set on the inner side of the fixed seat 601c, spring four 601e is located on the inner side of the fixed seat 601c, one end of spring four 601e is fixedly set on the side of the top frame 601d, and the other end abuts against the inner side of the fixed seat 601c, the fixing column 601f is fixedly set on the inner side of the fixing frame 100, the positioning groove 601g is opened on the end face of the fixing column 601f, the positioning column 601h is fixedly set on the side of the top frame 601d away from the fixed seat 601c, and the positioning column 601h is slidably set on the inner side of the positioning groove 601g.

[0051] The positioning groove 601g is a strip groove similar to a spline groove, and the end surface of the fixing column 601f is evenly surrounded by a plurality of positioning grooves 601g, while the side surface of the positioning column 601h is provided with a plurality of protrusions matching the positioning grooves 601g.

[0052] The adsorbent 602 includes a sliding buckle 602a, a plate 602b, a slide bar 602c, a convex plate 602d, a spring 5 602e, a magnetic block 1 602f, a fixed screw 602g and a magnetic block 2 602h. The sliding buckle 602a is slidably arranged on the side of the test strip 300, the bottom of the plate 602b is slidably arranged on the inner side of the slide groove 400, the side of the plate 602b is abutted against the side of the sliding buckle 602a, the sliding bar 602c is fixedly arranged on the side of the plate 602b, and the convex plate 602d is fixedly arranged on the side of the sliding buckle 602a. It is placed on the top of the sliding buckle 602a, and the end of the sliding rod 602c away from the abutment plate 602b passes through and is slidably set on the side of the protruding plate 602d. The two ends of the spring five 602e are respectively fixed on the end face of the sliding rod 602c and the side of the protruding plate 602d. The magnetic block 1 602f is fixed on the top of the sliding buckle 602a, and the magnetic block 2 602h is fixed on the bottom of the fixing screw 602g. When in use, the fixing screw 602g is located directly above the sliding buckle 602a and is threadedly connected to the supporting structure.

[0053] There are multiple adsorption members 602 which are evenly arranged on the top of the test strip 300 .

[0054] When in use: the main function of the support assembly 600 is to support the test tape 300 so that the test tape 300 is kept in close contact with the wall surface of the support structure, so as to achieve the purpose of timely response to the deformation of the support structure.

[0055] Among them, the top column 601b of the lifting member 601 abuts against the side of the test tape 300, and as the test tape 300 is pulled out, the thickness of the entire bundle of the test tape 300 becomes thinner, and the top column 601b can also change with the test tape 300 due to the push of the spring push rod 601a. ​​Under the restriction of the top column 601b and the spring push rod 601a, the test tape 300 can maintain a straight line movement without being skewed during the process of being pulled out, which is beneficial to the winding and unfolding of the test tape 300.

[0056] The top frame 601d is tightly attached to the bottom of the test strip 300 and lifts up the test strip 300, so that the test strip 300 is close to the support structure. By moving the top frame 601d axially along the rotating shaft 200, the top frame 601d overcomes the elastic force of the spring four 601e and moves, so that the positioning column 601h can slide out of the positioning groove 601g, and then the top frame 601d is rotated at a fixed angle, and then the positioning column 601h is inserted into the positioning groove 601g, and the top frame 601d is fixed again. In this way, the distance between the test strip 300 and the support structure can be changed according to different installation environments, thereby facilitating the installation of the adsorption component 602.

[0057] The main purpose of the adsorption component 602 is to absorb the test tape 300 to the wall surface of the support structure by magnetic force to prevent the test tape 300 from falling. During installation, the fixing screws 602g are first arranged and fixed in sequence on the top wall of the foundation pit support structure, and then the abutment plate 602b is pulled, and the abutment plate 602b is pulled open to overcome the elastic force of spring five 602e, and then the sliding buckle 602a is buckled on the top of the test tape 300, and then the abutment plate 602b is released, so that the abutment plate 602b and the sliding buckle 602a are clamped on the test tape 300, and then the sliding buckle 602a is slid to the bottom of the fixing screw 602g, and finally the magnetic block 1 602f and the magnetic block 2 602h are kept adsorbed, so as to adsorb the test tape 300 to the top wall of the support structure.

[0058] The remaining structure is the same as that of Example 2.

[0059] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0060] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0061] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic monitoring and early warning device for collapse danger in subway foundation pit construction, characterized in that: include, A fixing frame (100), wherein the fixing frame (100) is fixed to the top of a foundation pit support structure when in use, a rotating shaft (200) is arranged at the bottom of the fixing frame (100), a test belt (300) is fixed and wound on the side of the rotating shaft (200), sliding grooves (400) are provided on both sides of the test belt (300), and the starting end of the test belt (300) is fixed to the inner wall of the foundation pit support structure by means of bolts, and A test assembly (500) is used to test the degree of deformation of the top of the foundation pit, comprising a walking member (501) arranged on the side of the test belt (300), and an alarm member (502) and a closing member (503) arranged on the side of the rotating shaft (200) of the fixing frame (100), wherein the alarm member (502) and the closing member (503) are respectively arranged on both sides of the test belt (300); The support assembly (600) is used to support the test belt (300) to ensure that the test belt (300) fits the foundation pit support structure, and comprises a lifting member (601) arranged on the lower side of the test belt (300) and an adsorption member (602) arranged on the top of the test belt (300).

2. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 1 is characterized by: The walking member (501) comprises an outer frame (501a), a rotating wheel (501b), a transmission gear (501c), a driving motor (501d), a rotating plate (501e), a slide rail (501f), a sliding plate (501g), a spring 1 (501h) and a laser rangefinder (501i). The outer frame (501a) is arranged on both sides of the test strip (300). A pair of rotating wheels (501b) are rotatably arranged at the ends of both sides of the outer frame (501a). Each transmission gear (501c) is driven by a drive motor (501d). The moving gear (501c) is fixedly arranged at the end of the rotating wheel (501b), the two transmission gears (501c) on each side of the outer frame (501a) are meshed, the output end of the driving motor (501d) is fixedly connected to the side of one of the transmission gears (501c), the driving motor (501d) is fixedly arranged on the side of the outer frame (501a) through a bracket, and the rotating wheels (501b) on each side of the outer frame (501a) respectively clamp the side of the sliding groove (400).

3. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 2 is characterized by: The rotating plate (501e) is rotatably mounted on the bottom of the inner wall of the outer frame (501a); the slide rail (501f) is located at one end of the rotating plate (501e) and is fixedly mounted on the bottom of the inner wall of the outer frame (501a); the sliding plate (501g) is slidably mounted on the inner side of the slide rail (501f); the two ends of the spring 1 (501h) are respectively fixedly mounted on the side of the slide plate (501g) and the side of the slide rail (501f); the rotating plate One end of the rotating plate (501e) close to the sliding rail (501f) is slidably matched with the side of the sliding plate (501g), and one end of the rotating plate (501e) away from the sliding plate (501g) is slidably matched with the bottom of the test strip (300). The laser rangefinder (501i) is fixedly arranged at the bottom of the inner wall of the outer frame (501a). The laser rangefinder (501i) is directly opposite to the sliding plate (501g) and can measure the moving distance of the sliding plate (501g).

4. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 3 is characterized by: The alarm component (502) comprises an adjustment plate (502a), a first connector (502b), a fixed ring (502c), a movable ring (502d), a follower ring (502e), a second connector (502f), a roller (502g), a threaded cylinder (502h), a second spring (502i), an adjustment cylinder (502j) and a rubber ring (502k). The adjustment plate (502a) is rotatably arranged on a side of the fixed frame (100). The adjusting plate (502a) is connected to the fixing frame (100) by bolts, the rotation center of the adjusting plate (502a) coincides with the rotation center of the rotating shaft (200), a pointer is fixedly provided on the side of the adjusting plate (502a), a scale is provided on the side of the fixing frame (100), the adjusting plate (502a) can adjust the rotation angle according to the scale and pointer on the side of the fixing frame (100), and the connector 1 (502b) is fixedly provided on the side of the adjusting plate (502a).

5. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 4 is characterized by: The fixed ring (502c) is sleeved and fixedly arranged on the end of the rotating shaft (200), the movable ring (502d) is sleeved and slidably arranged on the side of the rotating shaft (200), the follower ring (502e) is coaxially arranged with the rotating shaft (200) and is located between the fixed ring (502c) and the movable ring (502d), the second connector (502f) is fixedly arranged on the side of the follower ring (502e), and the roller (502g) is rollingly arranged between the follower ring (502e) and the rotating shaft (20 0), the threaded cylinder (502h) is sleeved and fixedly arranged on the side of the rotating shaft (200), the second spring (502i) surrounds the side of the rotating shaft (200), the two ends of the second spring (502i) are respectively fixedly arranged on the side of the movable ring (502d) and the side of the threaded cylinder (502h), the adjusting cylinder (502j) is sleeved and threadedly connected to the side of the threaded cylinder (502h), and the end of the adjusting cylinder (502j) abuts against the side of the movable ring (502d).

6. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 5 is characterized by: The rubber ring (502k) is fixedly arranged on a side of the moving ring (502d) close to the roller (502g), and the rubber ring (502k) is arranged in two layers along the radial direction of the moving ring (502d), one layer of the rubber ring (502k) is directly opposite to the end of the roller (502g), and the other layer of the rubber ring (502k) is directly opposite to the side of the follower ring (502e).

7. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 6 is characterized by: The constricting member (503) comprises a spring three (503a), a moving ring (503b), an adjusting ring (503c), a limiting column (503d) and a limiting hole (503e); the spring three (503a) surrounds one end of the rotating shaft (200) away from the alarm member (502); the moving ring (503b) is sleeved and slidably arranged on the side of the rotating shaft (200); and the two ends of the spring three (503a) are respectively fixedly arranged on the side of the moving ring (503b) and the rotating shaft. The side of the shaft (200), the adjusting ring (503c) is sleeved and slidably arranged on the side of the moving ring (503b), a plurality of the limiting posts (503d) are arranged and fixedly arranged on a side of the adjusting ring (503c) away from the spring three (503a), the limiting holes (503e) are opened on the inner side of the fixing frame (100) at a position directly facing the adjusting ring (503c), and the number of the limiting holes (503e) is equal to the number of the limiting posts (503d) and the spacing positions are the same.

8. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 7 is characterized by: The lifting member (601) comprises a spring push rod (601a), a lifting column (601b), a fixing seat (601c), a lifting frame (601d), a spring four (601e), a fixing column (601f), a positioning groove (601g) and a positioning column (601h); the spring push rod (601a) is provided with a pair of and fixedly arranged on the top of the inner wall of the fixing frame (100); the lifting column (601b) is fixedly arranged on the side of the output end of the spring push rod (601a); the fixing seat (601c) is fixedly arranged on the inner side of the fixing frame (100); and the side of the lifting frame (601d) is rotatably arranged on the fixing frame (100). The inner side of the seat (601c), the spring four (601e) is located on the inner side of the fixed seat (601c), one end of the spring four (601e) is fixedly arranged on the side of the top frame (601d), and the other end abuts against the inner side of the fixed seat (601c), the fixed column (601f) is fixedly arranged on the inner side of the fixed frame (100), the positioning groove (601g) is opened on the end surface of the fixed column (601f), the positioning column (601h) is fixedly arranged on the side of the top frame (601d) away from the fixed seat (601c), and the positioning column (601h) is slidably arranged on the inner side of the positioning groove (601g).

9. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 8 is characterized by: The adsorbent (602) comprises a sliding buckle (602a), a support plate (602b), a sliding rod (602c), a convex plate (602d), a spring five (602e), a magnetic block one (602f), a fixing screw (602g) and a magnetic block two (602h), wherein the sliding buckle (602a) is slidably arranged on the side of the test strip (300), the bottom of the support plate (602b) is slidably arranged on the inner side of the sliding groove (400), and the side of the support plate (602b) is The surface abuts against the side of the sliding buckle (602a), the sliding rod (602c) is fixedly set on the side of the abutment plate (602b), the convex plate (602d) is fixedly set on the top of the sliding buckle (602a), the end of the sliding rod (602c) away from the abutment plate (602b) penetrates and is slidably set on the side of the convex plate (602d), and the two ends of the spring five (602e) are respectively fixedly set on the end face of the sliding rod (602c) and the side of the convex plate (602d).

10. The automatic monitoring and early warning device for collapse danger in subway foundation pit construction according to claim 9 is characterized by: The first magnetic block (602f) is fixedly arranged on the top of the sliding buckle (602a), and the second magnetic block (602h) is fixedly arranged on the bottom of the fixing screw (602g). When in use, the fixing screw (602g) is located directly above the sliding buckle (602a) and is threadedly connected to the supporting structure.

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