Vertical micro-deformation monitoring system of foundation pit upper support building

Abstract

The invention belongs to the technical field of foundation pit detection, and discloses a vertical micro-deformation monitoring system for a foundation pit upper support building, and the system comprises a bottom plate which is rectangular and is made through concrete pouring; the mounting base is arranged above the bottom plate; the detection device is mounted at the top of the mounting base in a sliding manner; a damping mechanism is arranged at the top of the bottom plate, a quick mounting mechanism is arranged at the top of the mounting base, and the damping mechanism is composed of a first damping assembly and a second damping assembly and located between the bottom plate and the mounting base; through the arrangement of the quick mounting mechanism and the close fit of a convex column on the outer wall of a round rod and a spiral chute in a mounting cylinder, the round rod is rotated to drive a telescopic clamping block to generate radial displacement, so that three-point contact locking of the detection device is formed, the operation can be completed without any tool, the mounting efficiency is remarkably improved, and meanwhile, the detection accuracy is improved. And the initial clamping state is ensured through the inclined design of the telescopic clamping block and the pre-tightening force of the spring, and the stability and reliability of the equipment are enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit detection, and specifically relates to a vertical micro-deformation monitoring system for a building supported by a foundation pit. Background Technique

[0002] Foundation pit engineering is an important link in modern building construction. Especially in densely populated urban areas, due to limited land, it is often necessary to excavate foundation pits to provide space for underground facilities or building foundations. The construction process of foundation pits may cause settlement, displacement and deformation of the surrounding ground. Especially when the excavation depth of the foundation pit is large or the surrounding buildings are relatively dense, the deformation of the foundation pit may affect the safety of the overlying building. Therefore, the monitoring of vertical micro-deformation becomes particularly important. Vertical deformation monitoring can not only provide timely data on deformation, but also help engineers evaluate the impact of foundation pit construction on the overlying building, predict potential future risks, and take appropriate measures to prevent them.

[0003] There is currently disclosed a foundation pit detection device with the publication number of CN221645868U, which includes a control mechanism and an induction mechanism electrically connected to the outer wall of the control mechanism; an adjustment component is provided on the outer wall of the control mechanism, and the adjustment component includes: a ring body symmetrically arranged on the outer walls on both sides of the control mechanism; a groove body provided on the outer wall of the ring body facing the induction mechanism. In this foundation pit detection device, an adjustment component is provided on the outer wall of the control mechanism. By rotating the threaded rod, the internally threaded tube threadedly connected thereto moves up and down under the restriction of the slider and the chute, so as to achieve the purpose of adjusting the use height of the induction mechanism and the control mechanism. The locking of the threaded rod by the clamp connected to the ring body prevents the relative rotation of the internally threaded tube and the threaded rod. In this foundation pit detection device, the locking force of the clamp on the threaded rod is enhanced by providing an anti-slip pad on the inner wall of the clamp.

[0004] However, since the monitoring system of the above device is fixedly installed on the ground surface, once the equipment fails or needs maintenance, the removal process is often very cumbersome and time-consuming. During the removal process, it may have a certain impact on the stability of the foundation pit, especially in deep foundation pits or large-scale projects. Such removal operations may interfere with the progress of the entire construction process. In addition, when the equipment fails, maintenance and replacement rely on professional technicians, which not only increases the operating cost, but also may cause the system to be unable to work properly for a long time. In a high-precision monitoring system, a long-term monitoring interruption may result in gaps in monitoring data, thereby affecting the safety assessment and decision-making of the project. Therefore, it is necessary to improve and optimize it. Summary of the Invention

[0005] To solve the problems raised in the above background technique, the invention provides a vertical micro-deformation monitoring system for a building supported by a foundation pit.

[0006] To achieve the above object, the present invention provides the following technical solutions: a vertical micro-deformation monitoring system for a building supported by a foundation pit, comprising: A bottom plate, which is rectangularly arranged and made of concrete casting; An installation base, which is arranged above the bottom plate; A detection device, which is slidably installed on the top of the installation base; A shock-absorbing mechanism is arranged on the top of the bottom plate, and a quick-installation mechanism is arranged on the top of the installation base. The shock-absorbing mechanism is composed of a first shock-absorbing component and a second shock-absorbing component and is located between the bottom plate and the installation base; Among them, there are two groups of the quick-installation mechanisms and they are symmetrically distributed. The quick-installation mechanism includes an installation block fixedly installed on the top of the installation base. An installation cylinder is fixedly installed on the inner wall of the installation block. A round rod is arranged inside the installation cylinder. One end of the round rod is rotatably installed with a round plate. The other side of the round plate is fixedly installed with a telescopic rod. The other end of the telescopic rod is fixedly installed with a telescopic clamping block. The telescopic clamping block is elastically connected to the round plate through a second spring.

[0007] Preferably, a chute is opened inside the installation cylinder. The chute is spirally designed. A convex column is fixedly installed on the outer wall of the round rod. The convex column is slidably connected to the chute.

[0008] Preferably, two convex grooves are opened on the top of the installation base. Two convex blocks are fixedly installed on the bottom of the detection device. The two convex blocks are respectively slidably connected to the corresponding convex grooves.

[0009] Preferably, the telescopic clamping block is inclined and slidably connected to the installation cylinder. The outer wall of the telescopic clamping block abuts against the outer wall of the detection device.

[0010] Preferably, the end of the round rod away from the telescopic clamping block extends out of the installation cylinder and a fixing sleeve is fixedly sleeved on the outer wall. Hemispherical grooves are equidistantly opened on the outer wall of the knob.

[0011] Preferably, a pin is hingedly installed on the top of the installation block. The pin is adapted to the hemispherical groove of the knob on the outer wall of the round rod.

[0012] Preferably, there are four groups of the first shock-absorbing components, which are respectively arranged at the top corners of the bottom plate. The first shock-absorbing component includes a slide bar arranged above the bottom plate. The slide bar penetrates through the installation base and is slidably connected to the installation base.

[0013] Preferably, the bottom of the installation base and the top of the bottom plate are elastically connected through a spring-damper rod assembly. The four spring-damper rod assemblies are respectively located at the top corners of the bottom plate.

[0014] Preferably, there are two sets of the damping assemblies II which are symmetrically distributed. The damping assembly II includes two first fixing blocks fixedly installed on the top of the base plate. On one side of the two first fixing blocks close to each other, a rotating rod is rotatably installed. On the outer wall of the rotating rod, two rectangular plates are fixedly sleeved. On the outer walls of the two rectangular plates, two connecting rods are respectively hinged. On the bottom of the mounting base, two second fixing blocks are fixedly installed. The two second fixing blocks are respectively hinged to the corresponding two connecting rods.

[0015] Preferably, on the outer walls of the two rectangular plates of the two damping assemblies II, fixing plates are respectively hinged. The corresponding two fixing plates are elastically connected by first springs.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up the quick installation mechanism, the convex column on the outer wall of the round rod is tightly matched with the spiral chute in the installation cylinder. Rotating the round rod can drive the telescopic locking block to generate radial displacement, forming three-point contact locking of the detection device. The operation can be completed without any tools, significantly improving the installation efficiency. At the same time, the inclined design of the telescopic locking block and the spring pre-tightening force ensure the initial clamping state, enhancing the stability and reliability of the equipment. In addition, by fixedly sleeving a knob on the operating end of the round rod 23, hemispherical grooves are evenly distributed on the outer wall circumference thereof, forming discrete locking positions to prevent accidental movement of the round rod 23.

[0017] By setting up the damping mechanism, through the four groups of top angle slide bar-spring damping systems and the centrally symmetric rotating rod-connecting rod-spring quadrilateral mechanism, the influence of external forces such as construction vibration on the system is effectively absorbed and dispersed. The symmetric installation of the two damping assemblies effectively eliminates the eccentric load moment, improves the balance of the system, and significantly enhances the seismic performance and long-term operation reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the partial front sectional structural schematic diagram of the present invention; Figure 3 is the present invention Figure 2 the enlarged structural schematic diagram of A in; Figure 4 is the exploded structural schematic diagram of the detection device and the mounting base of the present invention; Figure 5 is the exploded structural schematic diagram of the mounting block and the mounting cylinder of the present invention; Figure 6 is the partial exploded structural schematic diagram of the quick installation mechanism of the present invention; Figure 7 is the structural schematic diagram of the chute of the present invention; Figure 8Schematic structural diagram of the shock absorption mechanism of the present invention; Figure 9 Exploded structural diagram of the mounting base and the bottom plate of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram of B in the present invention.

[0019] In the figure: 1. Bottom plate; 11. Slide bar; 111. Spring-damper rod assembly; 12. Fixed block one; 121. Rotating rod; 13. Rectangular plate; 131. Fixed plate; 132. Spring one; 14. Link rod; 2. Mounting base; 21. Mounting block; 211. Pin; 22. Mounting cylinder; 221. Chute; 23. Round rod; 231. Convex column; 232. Round plate; 24. Telescopic locking block; 25. Telescopic rod; 26. Spring two; 27. Fixed block two; 201. Convex groove; 3. Detection device; 31. Convex block. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figures 1 to 10 shown, the present invention provides a vertical micro-deformation monitoring system for a building supported by a foundation pit, including: A bottom plate 1, which is rectangularly arranged and made of concrete by pouring; A mounting base 2, which is arranged above the bottom plate 1; A detection device 3, which is slidably mounted on the top of the mounting base 2; A shock absorption mechanism is arranged on the top of the bottom plate 1, and a quick installation mechanism is arranged on the top of the mounting base 2. The shock absorption mechanism is composed of a first shock absorption component and a second shock absorption component and is located between the bottom plate 1 and the mounting base 2; Among them, there are two groups of quick-loading mechanisms and they are symmetrically distributed. The quick-loading mechanism includes a mounting block 21 fixedly mounted on the top of the mounting base 2, a mounting cylinder 22 fixedly mounted on the inner wall of the mounting block 21, a round rod 23 is provided inside the mounting cylinder 22, one end of the round rod 23 is rotatably mounted with a round plate 232, the other side of the round plate 232 is fixedly mounted with a telescopic rod 25, and the other end of the telescopic rod 25 is fixedly mounted with a telescopic block 24, the telescopic block 24 and the round plate 232 are elastically connected by a spring 26, and the inner wall of the mounting cylinder 22 is fixed with a round plate 232. A slide groove 221 is provided on the top of the round rod 23, and the slide groove 221 is designed in a spiral shape. A convex column 231 is fixedly installed on the outer wall of the round rod 23, and the convex column 231 is slidably connected to the slide groove 221. Two convex grooves 201 are provided on the top of the mounting base 2, and two convex blocks 31 are fixedly installed on the bottom of the detection device 3. The two convex blocks 31 are respectively slidably connected to the corresponding convex grooves 201. The telescopic block 24 is designed in an inclined shape and is slidably connected to the mounting tube 22. The outer wall of the telescopic block 24 conflicts with the outer wall of the detection device 3.

[0022] The above solution is adopted: by setting a quick-install mechanism, the outer wall boss 231 of the round rod 23 cooperates with the spiral groove 221 in the installation cylinder 22. When the round rod 23 is rotated, the boss 231 moves along the groove 221, driving the telescopic block 24 to produce radial displacement. A spring 26 is set between the telescopic block 24 and the circular plate 232. The pre-tightening force ensures the initial clamping state. During operation, the round rod 23 rotates to form a three-point contact between the outer wall of the telescopic block 24 and the outer wall of the detection device 3. The round rod 23 is rotated in the opposite direction, and the boss 231 rises along the groove 221. The telescopic block 24 retracts under the action of the spring force, and the locked state is released. No disassembly tools are required during the entire process.

[0023] like Figures 1 to 3 As shown, one end of the round rod 23 away from the telescopic block 24 extends out of the mounting tube 22 and a fixed sleeve is provided on the outer wall with a knob, and hemispherical grooves are provided on the outer wall of the knob at equal distances around the circumference: a pin 211 is hingedly installed on the top of the mounting block 21, and the pin 211 is adapted to the hemispherical groove of the knob on the outer wall of the round rod 23.

[0024] The above solution is adopted: a knob is fixedly sleeved on the operating end of the round rod 23, and hemispherical grooves are evenly distributed on the circumference of its outer wall to form discrete locking positions. The top of the mounting block 21 is hinged with a pin 211, and the spherical surface of its end forms a spherical pair contact with the knob groove. When the extension length of the round rod 23 needs to be adjusted, the mechanism rotates around the hinge point by toggling the end of the pin 211, and the pressure rotates around the hinge point, and the spherical surface of the end of the pin 211 disengages from the knob groove, releasing the axial constraint on the round rod 23.

[0025] like Figures 9 to 10As shown in the figure, there are four sets of shock-absorbing components I, which are respectively arranged at the top corners of the bottom plate 1. The shock-absorbing component I includes a slide bar 11 arranged above the bottom plate 1. The slide bar 11 penetrates through the mounting base 2 and is slidably connected with the mounting base 2. The bottom of the mounting base 2 and the top of the bottom plate 1 are respectively elastically connected by a spring-damper rod assembly 111, and the four spring-damper rod assemblies 111 are respectively located at the top corners of the bottom plate 1.

[0026] Adopting the above scheme: By setting the shock-absorbing component I, when an external force such as construction vibration causes the mounting base 2 to generate vertical or horizontal shaking, the shock-absorbing component I realizes vibration control through the following four steps. When the mounting base 2 is deviated from the equilibrium position by an external force, the slide bar 11 generates a relative displacement under the guiding action. When the mounting base 2 moves downward, the spring in the spring-damper rod assembly 111 is compressed, storing elastic potential energy. The damper in the spring-damper rod assembly 111 works synchronously, converting part of the mechanical energy into heat energy and dissipating it. After the external force disappears, the spring return force drives the mounting base 2 to reset and quickly return to stability.

[0027] As Figures 8 to 10 As shown in the figure, there are two sets of shock-absorbing components II, which are symmetrically distributed. The shock-absorbing component II includes two fixing blocks I 12 fixedly installed on the top of the bottom plate 1. Rotating rods 121 are rotatably installed on one side of the two fixing blocks I 12 close to each other. Two rectangular plates 13 are fixedly sleeved on the outer wall of the rotating rod 121. Two connecting rods 14 are respectively hinged on the outer walls of the two rectangular plates 13. Two fixing blocks II 27 are fixedly installed on the bottom of the mounting base 2. The two fixing blocks II 27 are respectively hinged with the corresponding two connecting rods 14. Fixing plates 131 are respectively hinged on the outer walls of the two rectangular plates 13 in the two shock-absorbing components II. The corresponding two fixing plates 131 are respectively elastically connected by a spring I 132.

[0028] The above scheme is adopted: by setting up a shock-absorbing component 2, when the mounting base 2 is subjected to external force such as construction vibration to produce vertical shaking, the shock-absorbing component 2 realizes vibration absorption through the following four steps. The external force is transmitted to the connecting rod 14 through the mounting base 2, and the connecting rod 14 pulls the rectangular plate 13 to rotate around the rotating rod 121. When the rectangular plate 13 rotates, the distance between the two fixed plates 131 increases, and the spring 132 is stretched to store elastic potential energy. The hinge point of the connecting rod 14 and the rectangular plate 13 forms a variable angle. Through the kinematic characteristics of the quadrilateral mechanism, the linear vibration is converted into rotational motion. When the external force disappears, the contraction force of the spring 132 drives the fixed plate 131 to reset, driving the rectangular plate 13 rotates in the opposite direction, and the system returns to its initial equilibrium state; two sets of shock-absorbing components are symmetrically installed to eliminate the eccentric load torque and improve the balance of the system. The preload design of spring 132 makes the system exhibit high rigidity and rapid reset during small vibrations, and achieves soft landing through nonlinear deformation of the spring during large vibrations, thereby widening the shock absorption range. The rotating rod 121 adopts rolling bearings, and the connecting rod 14 hinge point adopts self-lubricating material to ensure long-term wear-free operation. The various components are connected by bolts, and the spring 132 can be replaced separately to reduce maintenance costs. The spatial motion characteristics of the quadrilateral mechanism can not only absorb vertical vibrations, but also effectively attenuate horizontal impacts.

[0029] The working principle and use process of the present invention: When the detection device 3 needs to be installed on the top of the installation base 2, the staff needs to align the two convex blocks 31 at the bottom of the detection device 3 with the two convex grooves 201 at the top of the installation base 2, and then slide the detection device 3 into place so that the outer wall of the detection device 3 first contacts the two telescopic blocks 24. The inclined design of the telescopic blocks 24 allows the two telescopic blocks 24 to be squeezed outward during the insertion of the detection device 3. The elastic design of the telescopic rod 25 and the second spring 26 allows the two telescopic blocks 24 to be squeezed inside the installation tube 22, causing the second spring 26 and the telescopic rod 25 to contract. When the detection device 3 cannot move, the detection device 3 releases the pressure on the two telescopic blocks 24, causing the two springs 26 to rebound, causing the two telescopic blocks 24 to return to their original positions, and finally causing the detection device 3 to be clamped between the convex groove 201 and the two telescopic blocks 24; When it is necessary to remove the detection device 3, the staff needs to move the two latches 211 to make them perpendicular to the corresponding mounting blocks 21, so that the latches 211 release the limit of the knob on the outer wall of the round rod 23, and then rotate the round rod 23 to rotate, and the round rod 23 drives the protruding column 231 to rotate. Through the sliding connection between the protruding column 231 and the sliding groove 221, the round rod 23 drives the circular plate 232, the telescopic rod 25 and the telescopic block 24 to move horizontally inside the mounting tube 22, so that the two telescopic blocks 24 enter the interior of the mounting tube 22, and then the detection device 3 is removed; Due to the multiple construction operations at the construction site, vibrations are generated during construction. By setting up the spring-damper rod assembly 111, the vibration force is absorbed. When the installation base 2 receives an external force that causes it to sway in the vertical direction, the angle between the rectangular plate 13 and the connecting rod 14 changes. The rectangular plate 13 drives the corresponding two fixing plates 131 to move away from each other. However, through the elastic connection of the first spring 132, the outward tensile force is absorbed by the first spring 132, thereby reducing the sway.

[0030] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Vertical micro-deformation monitoring system for buildings supported by foundation pits, characterized in that, Including: The bottom plate (1) is rectangular and made by casting concrete; The installation base (2) is arranged above the bottom plate (1); The detection device (3) is slidably installed on the top of the installation base (2); A shock absorption mechanism is arranged on the top of the bottom plate (1), and a quick installation mechanism is arranged on the top of the installation base (2). The shock absorption mechanism is composed of a first shock absorption component and a second shock absorption component and is located between the bottom plate (1) and the installation base (2); Among them, there are two groups of the quick installation mechanisms and they are symmetrically distributed. The quick installation mechanism includes an installation block (21) fixedly installed on the top of the installation base (2). An installation cylinder (22) is fixedly installed on the inner wall of the installation block (21). A round rod (23) is arranged inside the installation cylinder (22). One end of the round rod (23) is rotatably installed with a round plate (232). A telescopic rod (25) is fixedly installed on the other side of the round plate (232). A telescopic clamping block (24) is fixedly installed at the other end of the telescopic rod (25). The telescopic clamping block (24) is elastically connected with the round plate (232) through a second spring (26).

2. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 1, characterized in that: A chute (221) is opened inside the installation cylinder (22). The chute (221) is designed in a spiral shape. A convex column (231) is fixedly installed on the outer wall of the round rod (23). The convex column (231) is slidably connected with the chute (221).

3. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 1, characterized in that: Two convex grooves (201) are opened on the top of the installation base (2). Two convex blocks (31) are fixedly installed at the bottom of the detection device (3). The two convex blocks (31) are respectively slidably connected with the corresponding convex grooves (201).

4. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 2, characterized in that: The telescopic clamping block (24) is designed to be inclined and is slidably connected with the installation cylinder (22). The outer wall of the telescopic clamping block (24) abuts against the outer wall of the detection device (3).

5. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 1, characterized in that: One end of the round rod (23) far from the telescopic clamping block (24) extends out of the installation cylinder (22), and a knob is fixedly sleeved on the outer wall. Hemispherical grooves are equidistantly opened on the outer wall of the knob in a circumferential manner.

6. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 5, characterized in that: A latch (211) is hingedly installed on the top of the installation block (21). The latch (211) is adapted to the hemispherical groove of the knob on the outer wall of the round rod (23).

7. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 1, wherein: There are four groups of the first shock absorption components and they are respectively arranged at the top corners of the bottom plate (1). The first shock absorption component includes a slide bar (11) arranged above the bottom plate (1). The slide bar (11) penetrates through the installation base (2) and is slidably connected with the installation base (2).

8. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 7, characterized in that: The bottom of the installation base (2) and the top of the bottom plate (1) are elastically connected through a spring-damper rod assembly (111) respectively. The four spring-damper rod assemblies (111) are respectively located at the top corners of the bottom plate (1).

9. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 1, characterized in that: There are two sets of the second shock absorption components which are designed to be symmetrically distributed. The second shock absorption component includes two first fixing blocks (12) fixedly installed on the top of the bottom plate (1). Rotating rods (121) are rotatably installed on one side of the two first fixing blocks (12) close to each other. Two rectangular plates (13) are fixedly sleeved on the outer walls of the rotating rods (121). Two connecting rods (14) are respectively hinged on the outer walls of the two rectangular plates (13). Two second fixing blocks (27) are fixedly installed on the bottom of the installation base (2). The two second fixing blocks (27) are respectively hinged to the corresponding two connecting rods (14).

10. The vertical micro-deformation monitoring system for a building supported by a foundation pit according to claim 9, characterized in that: Fixing plates (131) are respectively hinged on the outer walls of the two rectangular plates (13) in the two second shock absorption components. The corresponding two fixing plates (131) are elastically connected through first springs (132).

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