A dynamic control foundation pit supporting device

Abstract

The utility model provides a kind of dynamic control foundation pit support device, belong to construction technology field.The utility model provides a kind of dynamic control foundation pit support device, including support pile assembly, regulation and control crossbeam component, inner support component and monitoring control component, support pile assembly is provided with two groups;Regulation and control crossbeam component connecting piece, bracing force adjusting part and connecting crossbeam;Bracing force adjusting part is set between two groups of support pile assembly by connecting piece, and bracing force adjusting part adjusts the position and stress of connecting crossbeam;One-way check valve is provided between each connecting piece and connecting crossbeam, and connecting crossbeam has the one-way activity freedom;Monitoring control component is used to monitor the stress of connecting crossbeam and the deformation of support pile assembly.The utility model provides a kind of dynamic control foundation pit support device, when device uses, bracing force adjusting part pushes connecting crossbeam to specified position, one-way check valve can avoid connecting crossbeam to appear back, and bracing force adjusting part can remove the force of connecting crossbeam.

Description

Technical Field

[0001] This utility model belongs to the field of construction technology, specifically relating to a dynamic control foundation pit support device. Background Technology

[0002] An excavation pit refers to a deep pit or depression in a construction site used for building underground structures. During construction, excavation pits are typically created by excavating soil, rock, or other materials to house a portion of the underground structure. Before excavation, an excavation plan should be determined based on geological and hydrological data, taking into account the conditions of nearby buildings, and waterproofing and drainage work should be carried out. When the excavation pit is deep or there are buildings nearby, appropriate support structures can be used to support the pit, preventing the soil walls on both sides of the pit from collapsing during excavation, protecting the surrounding environment, and ensuring worker safety.

[0003] In existing technologies, during the installation of foundation pit support structures, driven or cast-in-place support piles can be used to provide support force. These support piles can be reinforced concrete piles or steel pipe piles. Horizontal braces are connected between opposing support piles, and the sides of the foundation pit are supported through these support piles and the lateral braces. To improve the support effect, the horizontal braces are adjustable; by adjusting the position of the horizontal braces, the support force on the foundation pit sidewalls can be adjusted during the use of the device.

[0004] Adjustable cross braces typically use jacks or similar devices for adjustment. During use, the jacks must constantly apply pressure loads to the cross braces. The jacks bear large loads for extended periods, which can easily lead to overwork and malfunctions, affecting the support effect on the foundation pit. Utility Model Content

[0005] The purpose of this utility model is to provide a dynamic control foundation pit support device, which aims to solve the problem that the support structure is difficult to compensate for the offset distance during use, resulting in the inability to effectively support the inner wall of the foundation pit.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a dynamic control foundation pit support device, including: a support pile assembly, which is provided in two sets, correspondingly arranged and abutting against the two inner side walls of the foundation pit; The adjustable crossbeam assembly includes two sets of connectors, two sets of support force adjusting components, and a connecting crossbeam; the two sets of connectors are respectively mounted on two sets of support pile assemblies; the two sets of support force adjusting components are respectively mounted within the two sets of connectors; the two ends of the connecting crossbeam are slidably connected to the two sets of connectors and respectively connected to the two support force adjusting components; a one-way check valve is provided between each set of connectors and the connecting crossbeam, and under the action of the one-way check valve, the connecting crossbeam has a one-way degree of freedom of movement; and A monitoring and control component is used to monitor the stress on the connecting beam and the deformation of the support pile assembly, and to control the support force adjustment component to adjust the stress on the connecting beam.

[0007] In one possible implementation, the one-way check valve includes: The first anti-return saw tooth is provided on the inner side wall of the connector; The second anti-return saw tooth is provided on the outer side wall of the connecting beam; The first check tooth matches the second check tooth.

[0008] In one possible implementation, each set of the connectors includes: The upper clamping half-cylinder has one end set on the support pile assembly and has an upper half-cavity; The lower clamping half-cylinder has one end mounted on the support pile assembly and is positioned below the upper clamping half-cylinder, and has a lower half-cavity. The upper clamping half-cylinder and the lower clamping half-cylinder together form a sliding cavity into which one end of the connecting crossbeam slides; the corresponding support force adjusting component is disposed in the sliding cavity.

[0009] In one possible implementation, multiple sets of tension springs are provided between the upper clamping half-cylinder and the lower clamping half-cylinder to continuously pull the upper clamping half-cylinder and the lower clamping half-cylinder, so that the upper clamping half-cylinder and the lower clamping half-cylinder tend to move closer together.

[0010] In one possible implementation, multiple sets of the tension springs are evenly distributed along the length of the upper clamping half-cylinder.

[0011] In one possible implementation, upper connecting plates are provided at both ends of the lower opening of the upper clamping half-cylinder; lower connecting plates are provided at both ends of the upper opening of the lower clamping half-cylinder; the upper connecting plates and the lower connecting plates are arranged opposite to each other; and the tension spring is disposed between the upper connecting plates and the lower connecting plates.

[0012] In one possible implementation, a second reinforcing angle steel is provided between the upper end face of the upper clamping half-cylinder and the side wall of the support pile assembly; a third reinforcing angle steel is provided between the lower end face of the lower clamping half-cylinder and the side wall of the support pile assembly.

[0013] In one possible implementation, the monitoring and control component includes multiple sets of stress and strain gauges and a data acquisition controller. The data acquisition controller is located at the lower end of one set of the support pile components, the stress and strain gauges are located on the connecting crossbeam, the stress and strain gauges are connected to the data acquisition controller via data transmission lines, and the data acquisition controller is connected to the support force adjustment component via transmission control lines.

[0014] In one possible implementation, the support force adjustment member is provided with a first pressure sensor, which is connected to the data acquisition controller via a data transmission line.

[0015] In one possible implementation, a set of displacement sensors is provided at both the upper and lower ends of the support pile assembly, and the displacement sensors are connected to the data acquisition controller via a data transmission line.

[0016] The beneficial effects of the dynamically adjustable foundation pit support device provided by this utility model are as follows: Compared with the existing technology, the support pile assembly is provided in two sets. The support pile assembly is vertically installed along the inner wall of the foundation pit. The two sets of support pile assemblies are arranged opposite each other in the foundation pit to support the two inner walls of the foundation pit. The regulating beam assembly includes two sets of connectors, two sets of support adjustment components, and a connecting beam. One set of connectors is installed on one set of support piles, and one set of support adjustment components is installed inside one set of connectors. The two sets of connectors are arranged opposite each other, and the two sets of support adjustment components are arranged opposite each other. The end of the connecting beam passes into the connector and rests against the support adjustment component to realize the erection of the connecting beam. The connector limits the position of the connecting beam. The connecting beam has a degree of freedom of movement in its length direction. The support adjustment component can adjust the position of the connecting beam through its own expansion and contraction to compensate for the offset distance and realize effective support for the inner wall of the foundation pit. Each set of connectors is equipped with a one-way check piece between itself and the connecting beam. Under the action of the one-way check piece, the connecting beam has a degree of freedom of movement away from the support pile assembly, but no degree of freedom of movement towards the support pile assembly. After the support adjustment component controls the connecting crossbeam to reach the required position, the one-way check component limits the position of the connecting crossbeam to prevent the connecting crossbeam from retracting. At this time, the support adjustment component does not need to support the connecting crossbeam. The support adjustment component is relieved of the load and does not need to continuously apply pressure to the connecting crossbeam, which greatly reduces the load on the support adjustment component and helps to extend the service life of the support adjustment component. The monitoring and control component can monitor the strain and stress of the connecting beam. When the strain of the connecting beam is too large, it indicates that the pressure on the connecting beam is too large and there is a risk of collapse of the inner wall of the foundation pit. The monitoring and control component adjusts the position and stress of the connecting beam by controlling the support adjustment component, compensates for the offset distance, strengthens the support of the inner wall of the foundation pit, and jointly suppresses soil displacement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the installation structure of the dynamic control foundation pit support device provided in this embodiment of the utility model; Figure 2 A three-dimensional structural schematic diagram of the dynamic control pit support device provided in this embodiment of the utility model; Figure 3 This is a three-dimensional structural diagram of the support pile assembly used in the embodiments of this utility model; Figure 4 This is a three-dimensional structural diagram of the connector used in the embodiment of this utility model; Figure 5 This is a three-dimensional structural diagram of the support force adjustment component used in the embodiments of this utility model; Figure 6 This is a three-dimensional structural diagram of the adjustable telescopic component used in the embodiment of this utility model.

[0019] In the diagram: 1. Support pile assembly; 2. First group of lattice steel piles; 3. Second group of lattice steel piles; 4. Third group of lattice steel piles; 5. First reinforcing angle steel; 6. Connector; 7. Upper clamping half-cylinder; 8. Lower clamping half-cylinder; 9. Tension spring; 10. Upper connecting plate; 11. Lower connecting plate; 12. First check-back sawtooth; 13. Second check-back sawtooth; 14. Second reinforcing angle steel; 15. Third reinforcing angle steel; 16. Connecting beam; 17. Stress strain gauge; 18. Data acquisition controller; 19. Inner support rod; 20. Anchor cable; 21. Adjustable telescopic component; 22. Mounting rod; 23. Mounting plate; 24. Mounting ring; 25. Fixed limiting component; 26. Displacement sensor; 27. Excavation pit; 28. Support force adjustment component. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Please refer to Figures 1 to 6The present invention provides a specific embodiment of a dynamic control foundation pit support device. The foundation pit 27 has two sets of vertical side walls, which are arranged opposite to each other. The height direction of the foundation pit 27 is defined as the up-down direction. The two sets of side walls of the foundation pit 27 are the left and right side walls. The opposite end faces of the left and right side walls of the foundation pit 27 are the inner side walls of the foundation pit 27. The device is installed on the opposite inner side walls of the foundation pit 27.

[0022] Please refer to Figures 1 to 6 The support pile assembly 1 is provided in two sets. The support pile assembly 1 is vertically installed along the left and right inner walls of the foundation pit 27. The two sets of support pile assemblies 1 are arranged opposite each other to support the two inner walls of the foundation pit 27.

[0023] The support pile component 1 can be constructed using easily disassembled lattice steel piles, which facilitates construction and subsequent disassembly, helps to shorten the construction period, improve construction efficiency, facilitate resource recycling, and reduce costs.

[0024] The support pile assembly 1 extends from the bottom of the foundation pit 27 to the opening of the foundation pit 27 and passes through the opening of the foundation pit 27.

[0025] A set of support pile components 1 may include multiple sets of lattice steel piles, which are arranged from left to right and whose horizontal centerlines coincide. Multiple sets of first reinforcing angle steels 5 may be arranged on the front and rear sides of the support pile component 1. The first reinforcing angle steels 5 are arranged between the inner wall of the foundation pit 27 and the support pile component 1 to strengthen the support of the support pile component 1.

[0026] As an optional embodiment, a set of support pile components 1 may include three sets of lattice steel piles. The first set of lattice steel piles 2 is set against the inner wall of the foundation pit 27. The first set of lattice steel piles 2 extends from the bottom of the foundation pit 27 to the opening of the foundation pit 27 and passes through the opening of the foundation pit 27. The second set of lattice steel piles 3 is set on the side of the first set of lattice steel piles 2 near the connecting beam 16. The third set of lattice steel piles 4 is set on the side of the second set of lattice steel piles 3 near the connecting beam 16. The three sets of lattice steel piles are fixed by steel plate bolts. The length of the second set of lattice steel piles 3 is less than the length of the first set of lattice steel piles 2, and the length of the third set of lattice steel piles 4 is less than the length of the second set of lattice steel piles 3.

[0027] The regulating beam assembly includes two sets of connectors 6, two sets of support adjustment components 28, and a connecting beam 16. A set of connectors 6 is installed on a set of support pile assembly 1, and a set of support adjustment components 28 is installed inside a set of connectors 6. The two sets of connectors 6 are arranged opposite to each other, and the two sets of support adjustment components 28 are arranged opposite to each other. The end of the connecting beam 16 is inserted into the connector 6 and rests against the support adjustment component 28 to realize the erection of the connecting beam 16. The connecting beam 16 is set horizontally.

[0028] The connector 6 limits the position of the connecting beam 16, and the support adjustment component 28 has the freedom of extension and retraction. Under the action of the support adjustment component 28, the connecting beam 16 has the freedom of left and right movement in its length direction. The position of the connecting beam 16 can be adjusted by its own extension and retraction to compensate for the offset distance and achieve effective support for the inner wall of the foundation pit 27.

[0029] The connector 6 is positioned on the horizontal centerline of the support pile assembly 1 to enhance the supporting effect of the connecting beam 16 on the support pile assembly 1.

[0030] An internal support assembly includes an internal support rod 19 and an anchor cable 20. The internal support rod 19 is vertically inserted into the side wall of the pit 27, that is, it is set on the side of the support pile assembly 1 away from the pit 27, which improves the stability of the internal support rod 19. The internal support rod 19 is used to anchor the anchor cable 20. The two sets of internal support rods 19 and the two sets of support pile assemblies 1 are located in the same vertical plane. The anchor cable 20 connects the internal support rod 19 and the support pile assembly 1 that is close to the internal support rod 19. The anchor cable 20 provides tension to the support pile assembly 1. There are two sets of internal support assemblies, which anchor the two sets of support pile assemblies 1 respectively. By adjusting the cable force on the anchor cable 20, the support of the support pile assembly 1 to the side wall of the pit 27 can be strengthened.

[0031] The monitoring and control component can monitor the strain and stress of the connecting beam 16. When the strain of the connecting beam 16 is too large, it indicates that the pressure on the connecting beam 16 is too large and there is a risk of collapse of the inner wall of the foundation pit 27. The monitoring and control component adjusts the position and stress of the connecting beam 16 by controlling the support adjustment component 28, compensates for the offset distance, strengthens the support of the inner wall of the foundation pit 27, and jointly suppresses soil displacement.

[0032] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figures 1 to 5 Each set of connectors 6 includes an upper clamping half-cylinder 7, a lower clamping half-cylinder 8, and a tension spring 9. One end of the upper clamping half-cylinder 7 is mounted on the support pile assembly 1 and has an upper half-cavity. One end of the lower clamping half-cylinder 8 is mounted on the support pile assembly 1 and is located below the upper clamping half-cylinder 7, and has a lower half-cavity. Multiple tension springs 9 are provided, and each tension spring 9 is evenly distributed between the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8 to continuously pull the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8, so that the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8 tend to move closer together.

[0033] The upper clamping half-cylinder 7 and the lower clamping half-cylinder 8 are arranged opposite each other, and the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8 are arranged along the horizontal direction. The opening of the side wall of the upper clamping half-cylinder 7 faces downward, and the opening of the side wall of the lower clamping half-cylinder 8 faces upward. The upper clamping half-cylinder 7 is fastened to the lower clamping half-cylinder 8.

[0034] Both ends of the lower opening of the upper clamping half-cylinder 7 are provided with upper connecting plates 10, which are horizontally positioned and extend upward to clamp the outer side of the half-cylinder 7; both ends of the upper opening of the lower clamping half-cylinder 8 are provided with lower connecting plates 11, which are horizontally positioned and extend downward to clamp the outer side of the half-cylinder 8; the upper connecting plates 10 and the lower connecting plates 11 are positioned opposite each other.

[0035] A tension spring 9 is provided between the upper connecting plate 10 and the lower connecting plate 11, which are arranged opposite to each other. Multiple sets of tension springs 9 can be arranged along the length direction of the upper connecting plate 10. The tension spring 9 has a pulling force to pull the upper connecting plate 10 and the lower connecting plate 11 closer to each other, which helps to pull the upper clamping half cylinder 7 and the lower clamping half cylinder 8 back to their original positions.

[0036] One end of the upper clamping half cylinder 7 is set on the support pile assembly 1, and one end of the lower clamping half cylinder 8 is set on the support pile assembly 1. The other end of the upper clamping half cylinder 7 and the other end of the lower clamping half cylinder 8 are adapted to be inserted into the end of the crossbeam 16.

[0037] The support force adjustment component 28 is horizontally set between the upper clamping half cylinder 7 and the lower clamping half cylinder 8. The support force adjustment component 28 is set along the horizontal center line of the connector 6. One end of the support force adjustment component 28 is set on the side wall of the support pile assembly 1, and the other end of the support force adjustment component 28 is located inside the upper clamping half cylinder 7 and the lower clamping half cylinder 8. The end of the connecting beam 16 passes through the upper clamping half cylinder 7 and the lower clamping half cylinder 8 and abuts against the other end of the support force adjustment component 28. The center line of the support force adjustment component 28 coincides with the center line of the connecting beam 16.

[0038] The support adjustment component 28 can be selected as a jack. The fixed end of the jack is set on the side wall of the support pile assembly 1, and the telescopic end of the jack is set towards the connecting beam 16.

[0039] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figures 3 to 5 The upper clamping half-cylinder 7 has a first anti-return serration 12 on its downward inner side wall, and the lower clamping half-cylinder 8 has a first anti-return serration 12 on its upward inner side wall. The first anti-return serration 12 is arranged circumferentially. The outer side wall of the end of the connecting beam 16 has a second anti-return serration 13, which is arranged circumferentially and matches the first anti-return serration 12. The first anti-return serration 12 cooperates with the second anti-return serration 13. The connecting beam 16 has a degree of freedom of movement away from the support pile assembly 1 and no degree of freedom of movement towards the support pile assembly 1.

[0040] The first anti-return saw tooth 12 is provided with a first saw tooth groove, and the second anti-return saw tooth 13 is provided with a second saw tooth groove. The first saw tooth groove and the second saw tooth groove cooperate so that the tooth of the first anti-return saw tooth 12 can be embedded in the second saw tooth groove, and the tooth of the second anti-return saw tooth 13 can be embedded in the first saw tooth groove. The first saw tooth groove and the second saw tooth groove are wedge-shaped grooves.

[0041] Optionally, the side of any set of teeth of the first anti-return saw teeth 12 away from the center of the pit 27 is an inclined surface, and the side closer to the center of the pit 27 is a vertical surface.

[0042] Optionally, the side of any set of teeth of the first anti-return saw teeth 12 away from the center of the pit 27 is an inclined plane, and the side closer to the center of the pit 27 is also an inclined plane. The vertical cross section of any set of teeth of the first anti-return saw teeth 12 is an obtuse triangle, that is, the angle between the side wall of any set of teeth of the first anti-return saw teeth 12 near the center of the pit 27 and its horizontal side is an obtuse angle.

[0043] After the support adjustment component 28 controls the connecting beam 16 to reach the required position, the first anti-return sawtooth 12 and the second anti-return sawtooth 13 limit the position of the connecting beam 16 to prevent the connecting beam 16 from retracting. At this time, the support adjustment component 28 does not need to support the connecting beam 16. The support adjustment component 28 is relieved of the load and does not need to continuously apply pressure to the connecting beam 16, which greatly reduces the load on the support adjustment component 28 and helps to extend the service life of the support adjustment component 28.

[0044] The upper end face of the upper clamping half cylinder 7 is provided with a second reinforcing angle steel 14, and the lower end face of the lower clamping half cylinder 8 is provided with a third reinforcing angle steel 15, so as to reinforce the upper clamping half cylinder 7 and the lower clamping half cylinder 8.

[0045] Optionally, one end of the upper clamping half-cylinder 7 is fixedly connected to the support pile assembly 1, and one end of the lower clamping half-cylinder 8 is fixedly connected to the support pile assembly 1. The end of the connecting beam 16 is inserted into the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8. When the support force adjusting component 28 pushes the connecting beam 16 to move the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8 to the outside, under the action of the first anti-return sawtooth 12 and the second anti-return sawtooth 13, since the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8 are made of metal materials, they can produce a certain elastic deformation. When adjusted to the specified position, the tension spring 9 continuously pulls the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8, so that the upper clamping half-cylinder 7 and the lower clamping half-cylinder 8 move closer to each other and restore their deformation, thereby locking the connecting beam 16.

[0046] Optionally, the side wall of the support pile assembly 1 is provided with an adjustment slide rail. The adjustment slide rail is vertically arranged, and there are two sets of the two sets of adjustment slide rails distributed vertically. One set of adjustment slide rails is suitable for embedding the vertical edge of the second reinforcing angle steel 14, and the second reinforcing angle steel 14 is slidably set in its corresponding adjustment slide rail. The other set of adjustment slide rails is suitable for embedding the vertical edge of the second reinforcing angle steel 14, and the second reinforcing angle steel 14 is slidably set in its corresponding adjustment slide rail.

[0047] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figure 2 In each set of internal support components, one set of internal support rods 19 is connected to two sets of anchor cables 20. Both sets of anchor cables 20 are set at the upper end of the internal support rods 19. One set of anchor cables 20 connects the upper end of the internal support rods 19 to the upper end of the support pile component 1. This anchor cable 20 is set horizontally. The other set of anchor cables 20 connects the upper end of the internal support rods 19 to the lower end of the support pile component 1. The two sets of anchor cables 20 can provide cable force support to the upper and lower ends of the support pile component 1, which can effectively improve the support effect of the support pile component 1 on the left and right sides of the foundation pit 27.

[0048] The inner support rods 19 and anchor cables 20 on the left and right sides of the foundation pit 27 are symmetrically arranged to ensure the balance of force on the lifting device.

[0049] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 6 The cable tension adjustment component includes an adjusting expansion member 21 and an installation rod 22: one end of the adjusting expansion member 21 is horizontally mounted on the support pile assembly 1 and has a horizontal degree of freedom of expansion and contraction; the installation rod 22 is mounted on the other end of the adjusting expansion member 21, and the anchor cable 20 passes through the support pile assembly 1 and is mounted on the installation rod 22.

[0050] The cable tension adjustment component is installed on the side wall of the support pile assembly 1 near the connecting beam 16. The cable tension adjustment component is used to fix the anchor cable 20 and adjust the cable tension on the anchor cable 20. The anchor cable 20 passes through the support pile assembly 1 and is installed on the cable tension adjustment component, which facilitates the pulling of the support pile assembly 1.

[0051] The cable tension adjustment component also includes a mounting plate 23, which is fixed to the vertical side wall of the support pile assembly 1. One end of the adjusting expansion member 21 is horizontally set on the mounting plate 23. The mounting plate 23 is provided with a clearance hole suitable for the anchor cable 20 to pass through. The adjusting expansion member 21 is horizontally set and can be a jack. The fixed end of the jack is set on the side wall of the mounting plate 23, and the telescopic end of the jack is set in a direction away from the mounting plate 23.

[0052] The mounting rod 22 is set at the telescopic end of the adjusting telescopic component 21. The mounting rod 22 is set horizontally, and the end of the anchor cable 20 that passes through the support pile assembly 1 is set on the mounting rod 22.

[0053] Adjusting the length of the telescopic component 21, adjusting the position of the end of the anchor cable 20, adjusting the cable force on the anchor cable 20, and adjusting the support force of the support pile assembly 1 on the inner wall of the pit 27.

[0054] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 6 Two sets of adjustable telescopic components 21 are provided, and the two sets of adjustable telescopic components 21 are arranged side by side. The mounting rod 22 is erected between the telescopic ends of the two sets of adjustable telescopic components 21. The end of the anchor cable 20 is provided with a mounting ring 24, which is sleeved on the mounting rod 22. The telescopic movement of the adjustable telescopic components 21 causes the position of the mounting rod 22 to change, which in turn causes the position of the mounting ring 24 and the anchor cable 20 to be adjusted.

[0055] The mounting plate 23 is also provided with a fixing limit member 25, which is located between the two sets of adjustable telescopic members 21. The fixing limit member 25 is suitable for the passage of the anchor cable 20 and can limit the anchor cable 20.

[0056] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figures 1 to 5 The monitoring and control components include multiple sets of stress and strain gauges 17 and a data acquisition controller 18. The data acquisition controller 18 is located at the lower end of a set of support pile components 1. The stress and strain gauges 17 are located on the connecting crossbeam 16. The stress and strain gauges 17 are connected to the data acquisition controller 18 through a data transmission line. The data acquisition controller 18 is connected to the support force adjustment component 28 and the cable force adjustment component through a transmission control line.

[0057] The strain gauge 17 is installed on the connecting beam 16 and can detect the strain of the connecting beam 16. The strain gauge 17 is connected to the data acquisition controller 18 through the data transmission line and transmits the strain data to the data acquisition controller 18.

[0058] When the strain of the connecting beam 16 is too large, it indicates that the pressure on the connecting beam 16 is too great, and there is a risk of collapse of the inner wall of the foundation pit 27. The data acquisition controller 18 adjusts the cable force of the anchor cable 20 by controlling the cable force adjustment component. The data acquisition controller 18 can also adjust the position and stress of the connecting beam 16 by controlling the support force adjustment component 28 to compensate for the offset distance, strengthen the support of the inner wall of the foundation pit 27, and jointly suppress soil displacement.

[0059] Multiple sets of stress strain gauges 17 are provided on the connecting beam 16, and the stress strain gauges 17 are evenly distributed along the length of the connecting beam 16.

[0060] The connecting beam 16 can be assembled from multiple beam segments by fixing them together with flanges and bolts, and each beam segment is provided with at least one set of stress strain gauges 17.

[0061] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figure 5 as well as Figure 6 Each set of support force adjustment components 28 is equipped with a set of first pressure sensors, and each set of cable force adjustment components is equipped with a set of second pressure sensors. The first pressure sensors can monitor the magnitude of the force applied by the support force adjustment components 28, and the second pressure sensors can monitor the magnitude of the force applied by the cable force adjustment components.

[0062] The support force adjustment component 28 is a jack. An oil pressure sensor can be installed on the oil circuit of the jack. This oil pressure sensor is the first pressure sensor. The first pressure sensor is connected to the data acquisition controller 18 through the data transmission line, which can accurately monitor the pressure borne by the jack and facilitate timely adjustment.

[0063] The telescopic component 21 is a jack. An oil pressure sensor can be installed on the oil circuit of the jack. This oil pressure sensor is the second pressure sensor. The second pressure sensor is connected to the data acquisition controller 18 through a data transmission line, which can accurately monitor the pressure borne by the jack and facilitate timely adjustment.

[0064] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figure 3 A set of displacement sensors 26 are respectively installed at the upper and lower ends of the support pile assembly 1. The displacement sensors 26 are connected to the data acquisition controller 18 through a data transmission line.

[0065] Multiple sets of displacement sensors 26 are installed on the support pile assembly 1 and are located close to the inner wall of the foundation pit 27. One set of displacement sensors 26 is installed at the upper end of the support pile assembly 1 and the other set of displacement sensors 26 is installed at the lower end of the support pile assembly 1. The displacement sensors 26 are used to monitor the horizontal displacement of the support pile assembly 1. The inclination of the inner wall of the foundation pit 27 can be calculated by the displacement difference between the upper and lower sets of displacement sensors 26.

[0066] It may also be equipped with environmental monitoring components, including multiple sets of static levels, etc. The static levels are used to monitor the settlement of surrounding buildings and pipelines. The static levels are connected to the data acquisition controller 18 through data transmission lines.

[0067] The data acquisition controller 18 can be installed on the ground to the side of the lower end of one of the support pile assemblies 1.

[0068] The data acquisition controller 18 can be an industrial computer (PLC or dedicated controller) with built-in control algorithms and logic. It is used to receive all sensor data, compare it with preset safety thresholds, make decisions based on the built-in algorithms, control the action of the support force adjustment component 28 and / or the cable force adjustment component, realize the dynamic adjustment of the anchor cable 20 and / or the connecting beam 16, adapt to the displacement of the pit 27, and support the inner wall of the pit 27.

[0069] As a specific embodiment of the dynamically adjustable foundation pit support device provided by this utility model, please refer to Figures 1 to 6 The stress data of the strain gauge 17 monitored by the data acquisition controller 18 is set with stress warning values ​​and stress alarm values, and the stress warning value is less than the stress alarm value; the displacement data of the displacement sensor 26 monitored by the data acquisition controller 18 is set with displacement warning values ​​and displacement alarm values, and the displacement warning value is less than the displacement alarm value; the warning mechanism of the data acquisition controller 18 is as follows: A1. In safe sleep mode, the data of stress strain gauge 17 is less than the stress warning value, and the data of displacement sensor 26 is less than the displacement warning value. A2. In the initial warning stage, when the data of stress strain gauge 17 is greater than the stress warning value and less than the stress alarm value, the data acquisition controller 18 controls the cable force adjustment component to adjust the cable force of anchor cable 20. A3. In the intermediate alarm stage, when the data of displacement sensor 26 is greater than the displacement warning value or less than the displacement alarm value, data acquisition controller 18 controls the cable force adjustment component to adjust the cable force of anchor cable 20, and data acquisition controller 18 controls the support force adjustment component 28 to adjust the position of connecting beam 16. A4. In the final warning stage, the data of the stress strain gauge 17 is greater than the stress alarm value, and the data of the displacement sensor 26 is greater than the displacement alarm value. The data acquisition controller 18 controls the cable force adjustment component to adjust the cable force of the anchor cable 20, and the data acquisition controller 18 controls the support force adjustment component 28 to adjust the position of the connecting beam 16, and an audible and visual alarm is triggered.

[0070] For details, please refer to Figures 1 to 6 The displacement warning value and displacement alarm value are set according to the safety level requirements of the foundation pit 27. The displacement warning value (δ warning) of the first-level foundation pit 27 can be set to 25mm, and the displacement alarm value (δ control) can be set to 30mm. The stress warning value (σ warning) is set according to the design bearing capacity of the connecting beam 16. The stress warning value (σ warning) is set to 80% of the design bearing capacity, and the stress alarm value (σ control) is set to 90% of the design bearing capacity.

[0071] In safe hibernation mode, the system is in a hibernation maintenance state and does not require active control. This state can include the following situations: 1. All displacement sensor data 26 are below the preset displacement warning value and the rate of change is stable. All stress strain gauge data 17 are below the preset stress warning value and the rate of change is stable. This indicates that the foundation pit 27 is in a stable state and the stress and deformation of the support system are within expectations. 2. If the data shows brief and minor fluctuations but quickly returns to normal, it may be caused by construction vibration, temperature changes, or brief accidental loads. In this case, the support system should be observed and not responded to avoid over-adjustment. 3. After the control action is completed, the latest collected data has returned to within the safe threshold, the system completes a closed loop, and enters a safe sleep state again.

[0072] In the initial warning stage, the stress of the connecting beam 16 exceeds the stress warning value, indicating that the pressure on the connecting beam 16 is too great. The inner wall of the pit 27 is squeezing the connecting beam 16, transferring the load on the connecting beam 16. The data acquisition controller 18 calculates the cable force that each group of anchor cables 20 needs to bear, controls the cable force adjustment component, adjusts the cable force of the anchor cables 20, increases the prestress of the anchor cables 20, and transfers part of the soil pressure on the inner wall of the pit 27 to the deep stable soil, thereby actively reducing the load on the connecting beam 16 and bringing the stress of the connecting beam 16 back to a safe range.

[0073] In the intermediate alarm stage, the deformation of the inner wall of the pit 27 increases. The data of the displacement sensor 26 is greater than the displacement warning value but less than the displacement alarm value, indicating that the support force in this area is insufficient. The data acquisition controller 18 calculates the cable force that each group of anchor cables 20 needs to bear, controls the cable force adjustment component to adjust the cable force of the anchor cables 20, and increases the prestress of the anchor cables 20. The data acquisition controller 18 controls the support force adjustment component 28 to adjust the position of the connecting beam 16, pushes the connecting beam 16, widens the distance between the two groups of support pile components 1, strengthens the support of the inner wall of the pit 27, forms a new stable state, and inhibits further deformation.

[0074] In the final warning stage, the data from strain gauge 17 exceeds the stress alarm value, the stress on connecting beam 16 exceeds the stress warning value, and the data from displacement sensor 26 exceeds the displacement alarm value. The deformation of the inner wall of the pit 27 increases. The data acquisition controller 18 calculates the cable force that each set of anchor cables 20 needs to bear, controls the cable force adjustment component to adjust the cable force of anchor cables 20, and increases the prestress of anchor cables 20. The data acquisition controller 18 controls the support force adjustment component 28 to adjust the position of connecting beam 16, pushes connecting beam 16, widens the distance between the two sets of support pile components 1, strengthens the support for the inner wall of the pit 27, forms a new stable state, and inhibits further deformation. At the same time, an audible and visual alarm is triggered to promptly prompt manual intervention for inspection, to check for any complex situations beyond the design expectations, and to take emergency measures.

[0075] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dynamically adjustable foundation pit support device, characterized in that, include: The support pile assembly consists of two sets, which are correspondingly installed and abut against the two inner side walls of the foundation pit. The adjustable crossbeam assembly includes two sets of connectors, two sets of support force adjusting components, and a connecting crossbeam; the two sets of connectors are respectively mounted on two sets of support pile assemblies; the two sets of support force adjusting components are respectively mounted within the two sets of connectors; the two ends of the connecting crossbeam are slidably connected to the two sets of connectors and respectively connected to the two support force adjusting components; a one-way check valve is provided between each set of connectors and the connecting crossbeam, and under the action of the one-way check valve, the connecting crossbeam has a one-way degree of freedom of movement; and A monitoring and control component is used to monitor the stress on the connecting beam and the deformation of the support pile assembly, and to control the support force adjustment component to adjust the stress on the connecting beam.

2. The dynamically adjustable foundation pit support device as described in claim 1, characterized in that, The one-way check valve includes: The first anti-return saw tooth is provided on the inner side wall of the connector; The second anti-return saw tooth is provided on the outer side wall of the connecting beam; The first check tooth matches the second check tooth.

3. The dynamically adjustable foundation pit support device as described in claim 1, characterized in that, Each set of the connectors includes: The upper clamping half-cylinder has one end set on the support pile assembly and has an upper half-cavity; The lower clamping half-cylinder has one end mounted on the support pile assembly and is positioned below the upper clamping half-cylinder, and has a lower half-cavity. The upper clamping half-cylinder and the lower clamping half-cylinder together form a sliding cavity into which one end of the connecting crossbeam slides; the corresponding support force adjusting component is disposed in the sliding cavity.

4. The dynamically adjustable foundation pit support device as described in claim 3, characterized in that, Multiple sets of tension springs are provided between the upper clamping half-cylinder and the lower clamping half-cylinder to continuously pull the upper clamping half-cylinder and the lower clamping half-cylinder, so that the upper clamping half-cylinder and the lower clamping half-cylinder tend to move closer together.

5. The dynamically adjustable foundation pit support device as described in claim 4, characterized in that, The multiple sets of tension springs are evenly distributed along the length of the upper clamping half-cylinder.

6. The dynamically adjustable foundation pit support device as described in claim 4, characterized in that, Both ends of the lower opening of the upper clamping half-cylinder are provided with upper connecting plates; both ends of the upper opening of the lower clamping half-cylinder are provided with lower connecting plates; the upper connecting plates and the lower connecting plates are arranged opposite to each other; the tension spring is arranged between the upper connecting plates and the lower connecting plates.

7. The dynamically adjustable foundation pit support device as described in claim 4, characterized in that, A second reinforcing angle steel is provided between the upper end face of the upper clamping half cylinder and the side wall of the support pile assembly; a third reinforcing angle steel is provided between the lower end face of the lower clamping half cylinder and the side wall of the support pile assembly.

8. The dynamically adjustable foundation pit support device as described in claim 1, characterized in that, The monitoring and control component includes multiple sets of stress and strain gauges and a data acquisition controller. The data acquisition controller is located at the lower end of one set of the support pile components. The stress and strain gauges are located on the connecting crossbeam. The stress and strain gauges are connected to the data acquisition controller via data transmission lines. The data acquisition controller is connected to the support force adjustment component via transmission control lines.

9. A dynamically adjustable foundation pit support device as described in claim 8, characterized in that, The support force adjustment component is equipped with a first pressure sensor, which is connected to the data acquisition controller via a data transmission line.

10. A dynamically adjustable foundation pit support device as described in claim 8, characterized in that, A set of displacement sensors is installed at both the upper and lower ends of the support pile assembly, and the displacement sensors are connected to the data acquisition controller via data transmission lines.

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