Supporting device for inhibiting deformation of foundation pit and settlement of building

Abstract

The invention provides a supporting device for restraining foundation pit deformation and building settlement, and belongs to the technical field of foundation pit excavation, the supporting device comprises a plurality of first supporting assemblies, the first end of each first supporting assembly is arranged on a structural floor, the second end of each first supporting assembly is arranged on a supporting structure, and the first supporting assemblies are telescopic; the second supporting assemblies are connected with the two adjacent first supporting assemblies, and the second supporting assemblies are telescopic; according to each first supporting assembly, the first end of a first supporting rod is connected with one of a structural floor slab and a supporting structure; the first end of the second supporting rod is connected with the other one of the structural floor slab and the supporting structure, and the second end of the second supporting rod is in threaded connection with the second end of the first supporting rod; the braking part comprises a shell connected with one of the first supporting rod and the second supporting rod, and a containing space is formed in the shell; the jack is arranged in the containing space and is in threaded connection with the other one of the first supporting rod and the second supporting rod.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit excavation, and particularly to a support device for suppressing foundation pit deformation and building settlement. Background Art

[0002] During the excavation of a foundation pit by the top-down method, due to excessive horizontal displacement of the supporting structure, the surrounding site of the foundation pit is disturbed by the soil excavation, resulting in a displacement field. Since this displacement field will affect the foundation pit and its surrounding environment, horizontal displacement towards the foundation pit and ground settlement downward will occur around the foundation pit.

[0003] Currently, the methods for suppressing foundation pit deformation and building settlement generally adopt reinforcement operations such as densifying the structural floor slab or enhancing the stiffness of the diaphragm wall support system. However, this method has deficiencies such as high construction difficulty, cumbersome construction process, extended construction period, low utilization rate, and difficulty in recycling. Summary of the Invention

[0004] In view of this, the present invention provides a support device for suppressing foundation pit deformation and building settlement, including a plurality of first support components and at least one second support component. For the plurality of first support components, the first end of each first support component is arranged on the structural floor slab, and the second end of each first support component is arranged on the supporting structure. The first support component is telescopic to apply prestress to the structural floor slab and the supporting structure to prevent the deformation of the structural floor slab and the supporting structure. The second support component connects two adjacent first support components, and the second support component is telescopic to apply a supporting force to support the first support component. Each first support component includes a first support rod and a second support rod. The first end of the first support rod is connected to one of the structural floor slab and the supporting structure. The first end of the second support rod is connected to the other of the structural floor slab and the supporting structure, and the second end of the second support rod is threadedly connected to the second end of the first support rod. Each first support component further includes a braking part, and the braking part includes a housing and a jack. The housing is connected to one of the first support rod and the second support rod, and a receiving space is formed inside the housing. The jack is arranged in the receiving space and is threadedly connected to the other of the first support rod and the second support rod. By operating the jack, the first support rod and the second support rod rotate relative to each other to extend or contract the first support component.

[0005] Optionally, the support device for suppressing foundation pit deformation and building settlement includes three first support components, and the angles formed by the three first support components and the structural floor slab are the same.

[0006] Optionally, one of the three first support components is located in the middle of the structural floor slab, and the other two first support components are symmetrically arranged with respect to one of the first support components, and the distance between the first ends of two adjacent first support components is less than the distance between the second ends of two adjacent first support components.

[0007] Optionally, a braking opening is formed on the side wall of the housing, and the handle of the jack extends out of the accommodating space through the braking opening. By operating the handle, the first support rod and the second support rod rotate relative to each other to extend or contract the first support component.

[0008] Optionally, each first support component further includes a connecting member. The jack is threadedly connected to the other one of the first support rod and the second support rod through the connecting member. The jack drives the connecting member to rotate, so that the first support rod and the second support rod rotate relative to each other.

[0009] Optionally, each first support component further includes a plurality of fixing members. A plurality of mounting holes are formed on the side of the housing away from the connecting member. Each fixing member passes through a mounting hole and is connected to the connecting member to maintain the extension or contraction of the first support component.

[0010] Optionally, each second support component includes a third support rod and a fourth support rod. The first end of the third support rod is connected to one of two adjacent first support components. The first end of the fourth support rod is connected to the other one of two adjacent first support components, and the second end of the fourth support rod is threadedly connected to the second end of the third support rod.

[0011] Optionally, the support structure is at least one of a diaphragm wall and a pile support.

[0012] According to the support device for suppressing foundation pit deformation and building settlement provided by the present invention, by setting the first support component, prestress can be applied between the support structure and the structural floor slab. For example, the first support component can be extended. In this way, during the foundation pit excavation process, the first support component can prevent the structural floor slab and the support structure from deforming due to the increase of the soil pressure or water pressure outside the foundation pit, so the stability of the foundation pit structure can be ensured, thereby suppressing the settlement and deformation of the building. By setting the second support component, the first support component can be supported, thereby ensuring the overall stability of the first support component. Further, since the first support component and the second support component can be telescopic, different working conditions can be adapted, the on-site processing time and material waste can be reduced, the support device has a high effective utilization rate, and can be recycled. Description of the Drawings

[0013] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features and advantages of the present invention will become clearer. In the drawings:

[0014] Figure 1 Shows the first layout diagram of the support device in the foundation pit according to an embodiment of the present invention;

[0015] Figure 2 Shows a perspective view of the support device according to an embodiment of the present invention;

[0016] Figure 3 Shows a perspective view of the support device from another angle according to an embodiment of the present invention;

[0017] Figure 4 Shows a perspective view of the braking part and its end fixing parts according to an embodiment of the present invention;

[0018] Figure 5 Shows a perspective view of the braking part from another angle according to an embodiment of the present invention;

[0019] Figure 6 Shows the second layout diagram of the support device in the foundation pit according to an embodiment of the present invention;

[0020] Figure 7 Shows the third layout diagram of the support device in the foundation pit according to an embodiment of the present invention.

[0021] Reference numerals

[0022] 1. First support assembly; 11. First support rod; 12. Second support rod; 13. Braking part; 131. Housing; 132. Jack; 133. Braking opening; 14. Connecting piece; 15. Fixing piece; 2. Second support assembly; 21. Third support rod; 22. Fourth support rod; 3. Structural floor slab; 4. Support structure; 5. Foundation pit excavation surface; 6. Underground structure. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present disclosure clearer and more understandable, the following further describes the present disclosure in detail with reference to specific embodiments and the accompanying drawings.

[0024] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0025] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0026] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, and C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc. In the case of using expressions such as "at least one of A, B, or C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, or C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.

[0027] It should also be noted that the directional terms mentioned in the embodiments, such as "up", "down", "front", "rear", "left", "right", etc., are only with reference to the directions in the accompanying drawings and are not used to limit the protection scope of the present disclosure. Throughout the accompanying drawings, the same elements are denoted by the same or similar reference numerals. When it may cause confusion in the understanding of the present disclosure, the conventional structures or configurations will be omitted.

[0028] In the process of implementing the present invention, it is found that during the excavation of the foundation pit by the top-down method, due to excessive horizontal displacement of the support structure, the surrounding site of the foundation pit will be disturbed by the soil excavation and a displacement field will be generated. Since this displacement field will affect the foundation pit and its surrounding environment, causing horizontal displacement towards the foundation pit and ground settlement downward around the foundation pit, when there are buildings around the foundation pit, it is necessary to strictly control the disturbance of the foundation pit excavation to the surrounding environment and ensure that the disturbance is within the specified range to guarantee the safety and applicability of the buildings. Therefore, the embodiments of the present invention provide a support device for suppressing the deformation of the foundation pit and the settlement of the building.

[0029] Figure 1 The first layout diagram of the support device in the foundation pit according to the embodiment of the present invention is shown. Figure 2 The perspective view of the support device according to the embodiment of the present invention is shown. Figure 3 The perspective view of the support device from another angle according to the embodiment of the present invention is shown.

[0030] As Figures 1-3 shown, the support device may include a plurality of first support components 1 and at least one second support component 2. The first end of each first support component 1 (such as Figure 2 the upper end of the first support component 1 shown) is connected to the structural support on the structural floor 3. The second end of each first support component 1 (such as Figure 2The lower end of the first support assembly 1 shown is connected to the structural support on the support structure 4. Further, the first support assembly 1 is telescopic to apply prestress to the structural floor 3 and the support structure 4 to prevent deformation of the structural floor 3 and the support structure 4, that is, the first support assembly 1 can support the structural floor 3 based on the support structure 4 and prevent deformation of the support structure 4 while supporting the structural floor 3. The direction of the prestress can be the same as the extension direction of the first support assembly 1. The second support assembly 2 connects two adjacent first support assemblies 1. The second support assembly 2 is telescopic to apply a supporting force to support the first support assembly 1. The direction of the supporting force can be the same as the extension direction of the second support assembly 2. The first end of the first support assembly 1 can be any end of the first support assembly 1. The second end of the first support assembly 1 can be the other end of the first support assembly 1.

[0031] In some embodiments, the number of the first support assemblies 1 can be adjusted according to the environmental complexity and engineering requirements to meet the needs of different working environments and different working conditions.

[0032] In some embodiments, the structural support can be a concrete or steel structure support. The concrete or steel structure support can be a wedge structure. Wherein, a groove is formed on one side of the concrete or steel structure support facing the first support assembly 1, and the groove matches the end face shape of the first support assembly 1, so that the matching surface can form a support surface, improving the stability of the support device and facilitating the application of prestress.

[0033] According to the embodiments of the present invention, by providing the first support assembly 1, prestress can be applied between the support structure 4 and the structural floor 3. For example, the first support assembly 1 can be extended. In this way, during the excavation of the foundation pit, the first support assembly 1 can prevent the structural floor 3 and the support structure 4 from deforming due to the increase in the soil pressure or water pressure outside the foundation pit, thus ensuring the stability of the foundation pit structure and suppressing the settlement and deformation of the building. By providing the second support assembly 2, the first support assembly 1 can be supported, thus ensuring the overall stability of the first support assembly 1. Further, since the first support assembly 1 and the second support assembly 2 are telescopic, they can adapt to different working conditions, reduce on-site processing time and material waste, make the support device have a high effective utilization rate, and can be recycled.

[0034] As Figure 2 and Figure 3 shown, in some embodiments, the support device includes three first support assemblies 1. Further, as Figure 1 shown, the angles formed by the three first support assemblies 1 and the structural floor 3 are the same. As Figure 1As shown, the support structure formed by the support device and the structural floor slab 3 presents a "Y" shape, and the structural floor slab 3, the support device, and the support structure 4 form a triangular support structure. Further, since the angles formed by the three first support components 1 and the structural floor slab 3 are the same, that is, the three first support components 1 are coplanar. When adjusting the length of the first support component 1, there is no need to deal with the angular deviation in three-dimensional space, so it can be adjusted relatively quickly. And because the three first support components 1 are coplanar, that is, a surface structure can be formed, thereby improving the stability of the support device.

[0035] As Figure 2 shown, in some embodiments, one of the three first support components 1 (such as Figure 2 the middle first support component 1 shown) is located in the middle of the structural floor slab 3, and the other two first support components 1 (such as Figure 2 the first support components 1 on both sides shown) are symmetrically arranged relative to one of the first support components 1 (such as Figure 2 the middle first support component 1 shown), and the distance between the first ends of two adjacent first support components 1 (such as Figure 2 the upper end of the first support component 1 shown) is less than the distance between the second ends of two adjacent first support components 1 (such as Figure 2 the lower end of the first support component 1 shown). That is, the three first support components 1 can form an isosceles triangle structure, so that the force received by the structural floor slab 3 can be transmitted to the three first support components 1 more evenly, and the three first support components 1 can evenly transmit the force to the support structure 4, thereby avoiding the risk of brittle fracture of the first support component 1 caused by local stress concentration, improving the safety of the foundation pit excavation operation, realizing a relatively stable support for the structural floor slab 3, and achieving the purpose of more evenly preventing the displacement development of the support structure 4.

[0036] Further, during the construction process, when unexpected situations occur and temporary support for the foundation pit is required, multiple support devices can be set, that is, by forming multiple "Y"-shaped support structures to jointly support one or more structural floor slabs 3 and one or more support structures 4 in the foundation pit, which can effectively control the deformation or displacement development of the structural floor slab 3 and the support structure 4 in the foundation pit, and thus reduce the impact on the surrounding environment.

[0037] In some embodiments, each first support component 1 includes a first support rod 11 and a second support rod 12. The first end of the first support rod 11 is connected to one of the structural floor slab 3 and the support structure 4. The first end of the second support rod 12 is connected to the other of the structural floor slab 3 and the support structure 4. For example, as Figure 2As shown in the figure, the upper end of the first support rod 11 is connected to the structural floor slab 3, the lower end of the first support rod 11 is connected to the upper end of the second support rod 12, and the lower end of the second support rod 12 is connected to the support structure 4. Further, the positions of the first support rod 11 and the second support rod 12 can be interchanged, that is, the upper end of the second support rod 12 is connected to the structural floor slab 3, the lower end of the second support rod 12 is connected to the upper end of the first support rod 11, and the lower end of the first support rod 11 is connected to the support structure 4.

[0038] Further, the diameters of the first support rod 11 and the second support rod 12 can be set to 0.2 m to 1 m. The inclination angles of the first support rod 11 and the second support rod 12 relative to the structural floor slab 3 are the same and can be 50 degrees to 70 degrees. In addition, a lifting ring (not shown in the figure) can be provided on the first support assembly 1. The lifting ring is connected to the first ends of the first support rod 11 and the second support rod 12 by welding, that is, the lifting ring can be provided at both ends of the first support assembly 1. By providing the lifting ring, a lifting device can be used to hoist the first support assembly 1, thereby improving the construction efficiency.

[0039] Further, the second end of the second support rod 12 and the second end of the first support rod 11 are connected by a threaded connection, that is, by changing the length of the screw thread screwed out or screwed in, the first support assembly 1 can be extended or contracted. The first support assembly 1 can be extended to a maximum length of 20 m and contracted to a minimum length of 6 m. Since the second support rod 12 and the first support rod 11 are connected by a threaded connection, the first support assembly 1 can be assembled or disassembled relatively quickly, thereby improving the construction convenience and being suitable for repeated use.

[0040] Further, the second support rod 12 and the first support rod 11 can also be connected in other ways to achieve the extension or contraction of the first support assembly 1. For example, the second support rod 12 and the first support rod 11 can form a hydraulic support rod for the first support assembly 1 based on the hydraulic principle.

[0041] Figure 4 The perspective view of the braking part and its end fixing part according to the embodiment of the present invention is shown. Figure 5 The perspective view of another angle of the braking part according to the embodiment of the present invention is shown.

[0042] As Figure 4 and Figure 5As shown, in some embodiments, each first support assembly 1 may further include a braking portion 13. The braking portion 13 may include a housing 131 and a jack 132. The housing 131 is connected to one of the first support rod 11 and the second support rod 12. A receiving space may be formed inside the housing 131. The housing 131 may be formed as a cylinder with an opening on one side and a hollow interior. The jack 132 may be disposed in the receiving space. The jack 132 is threadedly connected to the other of the first support rod 11 and the second support rod 12. For example, the housing 131 may be connected to the second support rod 12, and the jack 132 may be threadedly connected to the first support rod 11. By operating the jack 132, the first support rod 11 and the second support rod 12 can be relatively rotated to extend or contract the first support assembly 1.

[0043] In some embodiments, the jack 132 may be a hydraulic jack or other automatically operated hydraulic devices.

[0044] In some embodiments, a braking opening 133 is formed on the side wall of the housing 131. The handle of the jack 132 (not shown in the figure) extends out of the receiving space through the braking opening 133. The area of the braking opening 133 may be larger than the cross-sectional area of the handle to allow the handle to rotate and / or move within the braking opening 133.

[0045] In some embodiments, each first support assembly 1 may further include a connecting member 14. The jack 132 is threadedly connected to the other of the first support rod 11 and the second support rod 12 through the connecting member 14. For example, as Figure 2 shown, the connecting member 14 is threadedly connected to the first support rod 11. The jack 132 drives the connecting member 14 to rotate, so that the first support rod 11 and the second support rod 12 can be relatively rotated.

[0046] Furthermore, the jack 132 may include a handle and a main body. By operating the handle, the rotation of the main body can be controlled. The main body drives the connecting member 14 to rotate, so that the threads connecting the connecting member 14 to the other of the first support rod 11 and the second support rod 12 can be relatively rotated to extend or contract the first support assembly 1. By providing the connecting member 14 and connecting the connecting member 14 to the jack 132 instead of directly connecting the jack 132 to the first support rod 11 or the second support rod 12, the requirements for the structure of the first support rod 11 or the second support rod 12 can be reduced, thereby reducing the processing difficulty of the first support rod 11 or the second support rod 12, and the first support rod 11 or the second support rod 12 can be set as a hollow structure to reduce costs.

[0047] In some embodiments, each first support assembly 1 may further include a plurality of fixing members 15. On a side of the housing 131 away from the connecting member 14, a plurality of mounting holes are formed. Each fixing member 15 passes through a mounting hole and is connected to the connecting member 14. For example, when the housing 131 is connected to the second support rod 12 and the connecting member 14 is threadedly connected to the first support rod 11, the mounting holes may be provided between the housing 131 and the second support rod 12.

[0048] Further, the fixing member 15 may include a locking screw and a locking nut provided on the locking screw. Further, an operation hole (not shown in the figure) may be formed on a side wall of the first support rod 11 or the second support rod 12 connected to the housing 131, and a through hole (not shown in the figure) opposite to the mounting hole of the housing 131 is formed at a position facing the bottom plate of the housing 131. By providing the operation hole, it is convenient for the operator to install the fixing member 15.

[0049] After the operator passes the locking screw through the mounting hole and the through hole in sequence, by rotating the locking screw, the locking screw is connected to the connecting member 14. And the locking screw is fixed to the inner wall of the first support rod 11 or the second support rod 12 by using the locking nut. After the first support assembly 1 is extended or contracted by operating the jack 132, the fixing member 15 can be used to lock the extended or contracted state of the first support assembly 1 to maintain the extension or contraction of the first support assembly 1.

[0050] Further, the braking portion 13, the connecting member 14 and the fixing member 15 can simultaneously serve as a prestress applying device inside the first support assembly 1. Specifically, after the first support assembly 1 is installed, the handle of the jack 132 can apply prestress between the structural floor slab 3 and the supporting structure 4. In addition, after the prestress is applied to the first support assembly 1 by using the jack 132, the operator can lock the position of the first support rod 11 and the second support rod 12 by locking the locking nut on the inner wall of the first support rod 11 or the second support rod 12, and maintain the prestress on the first support assembly 1, thereby avoiding the problem of the disappearance of the prestress caused by the release of the jack 132 and improving the engineering safety and stability.

[0051] In some embodiments, the provided second support assembly 2 is closer to the supporting structure 4 than the structural floor slab 3. Each second support assembly 2 may include a third support rod 21 and a fourth support rod 22. The first end of the third support rod 21 is connected to one of two adjacent first support assemblies 1. The first end of the fourth support rod 22 is connected to the other of two adjacent first support assemblies 1. The second end of the fourth support rod 22 is threadedly connected to the second end of the third support rod 21. As Figure 2As shown, in the second support assembly 2 on the left side, the third support rod 21 is connected to the first support assembly 1 on the left side, and the fourth support rod 22 is connected to the first support assembly 1 in the middle. When temporarily supporting the foundation pit, the overall stability of the support device can be improved by providing support force through the second support assembly 2. And since the fourth support rod 22 and the third support rod 21 are connected by threads, the length of the threads can be adjusted to meet the requirements of foundation pits of different sizes, which is convenient for assembly or disassembly, thus facilitating the reuse of the support device.

[0052] In some embodiments, the support structure 4 is at least one of a diaphragm wall and a pile support. Further, the support structure 4 and the structural floor slab 3 can be provided with structural supports by means of reserved embedded parts or post-construction implanted bars.

[0053] Further, the support device can be applied to different scenarios and different stages of foundation pit excavation. Examples will be given below.

[0054] For example, the support device can be designed and installed in advance. During the foundation pit excavation process, embedded parts can be reserved when pouring the support structure 4 and the structural floor slab 3, and the structural supports can be installed. After the support structure 4, the structural floor slab 3 and the structural supports reach their working strength, the first support assembly 1 is installed. The length of the first support assembly 1 is adjusted by operating the handle of the jack 132 to apply prestress between the support structure 4 and the structural floor slab 3. The second support assembly 2 is installed and a support force is applied to the first support assembly 1, so as to complete the installation of the support device during the foundation pit excavation process to ensure the stability of the foundation pit structure.

[0055] Figure 6 Figure 2 shows the second layout diagram of the support device in the foundation pit according to the embodiment of the present invention.

[0056] For example, in the case where the support device is not designed and installed in advance, if an unexpected situation occurs during the foundation pit excavation process, resulting in excessive deformation of the support structure 4, reference can be made to Figures 2-6As shown, a support device can be quickly and temporarily erected to ensure the stability of the foundation pit structure. Further, after the construction of the support structure 4 and the structural floor 3 is completed, when the foundation pit is excavated, structural supports can be directly constructed on the support structure 4 and the structural floor 3 by means of post-inserted bars; then, a prestress application device is placed inside the first support assembly 1. After the construction of the structural supports on the support structure 4 and the structural floor 3 is completed, the first support assembly 1 is installed, and the length of the first support assembly 1 is adjusted by the jack 132. The jack 132 is used to apply prestress between the support structure 4 and the structural floor 3, and the second support assembly 2 is installed and a support force is applied to the first support assembly 1, thereby realizing the temporary erection of the support device. During the subsequent foundation pit excavation construction, as the depth of the foundation pit excavation surface 5 increases, the earth pressure or water pressure outside the foundation pit gradually increases, and the magnitude of the prestress can be adjusted by the jack 132 to control the deformation of the structural floor 3 and the support structure 4, reducing the impact of the foundation pit excavation on the surrounding environment.

[0057] Figure 7 Fig. shows the third layout diagram of the support device in the foundation pit according to an embodiment of the present invention.

[0058] For example, when the foundation pit excavation surface 5 is adjacent to existing underground structures 6 (such as tunnels, pipelines, etc.) during construction, reference can be made to Figures 2-5 and Figure 7 As shown, a support device can be quickly and temporarily erected to protect the existing underground structure 6 adjacent to the foundation pit excavation surface 5. Further, structural supports can be directly constructed on the support structure 4 and the structural floor 3 by means of post-inserted bars; then, a prestress application device is placed inside the first support assembly 1. After the construction of the structural supports on the support structure 4 and the structural floor 3 is completed, the first support assembly 1 is installed, and the length of the first support assembly 1 is adjusted by the jack 132. The jack 132 is used to apply prestress between the support structure 4 and the structural floor 3, and the second support assembly 2 is installed and a support force is applied to the first support assembly 1, thereby realizing the temporary erection of the support device. In this way, the disturbance to the adjacent existing underground structure 6 caused by the foundation pit excavation can be reduced.

[0059] In addition, reference can be made to Figures 1-7As shown, after the foundation pit excavation is completed, when the deformation of the support structure 4 approaches the standard control value, a support device can be temporarily built. That is, the support structure 4, the structural floor slab 3, and the first support assembly 1 can all be used for support at the position where the deformation of the support structure 4 is excessive after the foundation pit excavation is completed, so as to play a control role. The standard control value can be set according to requirements. Further, after the foundation pit excavation is completed, a structural support can be constructed directly at the depth of the position where the deformation of the support structure 4 is excessive and on the structural floor slab 3 by means of implanting steel bars; then, a prestress application device is placed inside the first support assembly 1. After the construction of the structural supports on the support structure 4 and the structural floor slab 3 is completed, the first support assembly 1 is installed, and the length of the first support assembly 1 is adjusted by the jack 132. Prestress is applied between the support structure 4 and the structural floor slab 3 through the jack 132, and the second support assembly 2 is installed and a support force is applied to the first support assembly 1, so as to temporarily build a support device after the foundation pit excavation is completed. In this way, the horizontal displacement of the support structure 4 can be prevented from continuing to develop under the action of creep, and the deformation of the structural floor slab 3 and the support structure 4 can be effectively controlled.

[0060] The embodiments of the present disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should all fall within the scope of the present disclosure.

Claims

1. A support device for suppressing foundation pit deformation and building settlement, characterized in that, Comprising: A plurality of first support components, with the first end of each first support component being provided on the structural floor slab and the second end of each first support component being provided on the support structure. The first support component is telescopic to apply prestress to the structural floor slab and the support structure to prevent deformation of the structural floor slab and the support structure; At least one second support component, with the second support component connecting two adjacent first support components. The second support component is telescopic to apply a supporting force to the first support component; Wherein, each first support component comprises: A first support rod, with the first end of the first support rod being connected to one of the structural floor slab and the support structure; A second support rod, with the first end of the second support rod being connected to the other of the structural floor slab and the support structure, and the second end of the second support rod being threadedly connected to the second end of the first support rod; A braking part, with the braking part comprising: A housing, connected to one of the first support rod and the second support rod, and an accommodation space being formed inside the housing; A jack, provided in the accommodation space, with the jack being threadedly connected to the other of the first support rod and the second support rod. By operating the jack, the first support rod and the second support rod rotate relative to each other to extend or contract the first support component.

2. The support device for suppressing foundation pit deformation and building settlement according to claim 1, characterized in that, There are three first support components, and the angles formed by the three first support components with the structural floor slab are the same.

3. The support device for suppressing foundation pit deformation and building settlement according to claim 2, characterized in that, One of the three first support components is located in the middle of the structural floor slab, and the other two first support components are symmetrically arranged relative to the one first support component, and the distance between the first ends of two adjacent first support components is less than the distance between the second ends of two adjacent first support components.

4. The support device for suppressing foundation pit deformation and building settlement according to any one of claims 1-3, characterized in that, A braking opening is formed on the side wall of the housing, and the handle of the jack extends out of the accommodation space through the braking opening. By operating the handle, the first support rod and the second support rod rotate relative to each other to extend or contract the first support component.

5. The support device for suppressing foundation pit deformation and building settlement according to any one of claims 1-3, characterized in that, Each first support component further comprises: A connecting piece, with the jack being threadedly connected to the other of the first support rod and the second support rod through the connecting piece. The jack drives the connecting piece to rotate to make the first support rod and the second support rod rotate relative to each other.

6. The support device for suppressing foundation pit deformation and building settlement according to claim 5, characterized in that, Each first support component further comprises a plurality of fixing pieces. Wherein, a plurality of mounting holes are formed on the side of the housing away from the connecting piece, and each fixing piece passes through one mounting hole and is connected to the connecting piece to maintain the extension or contraction of the first support component.

7. The support device for suppressing foundation pit deformation and building settlement according to any one of claims 1-3, characterized in that, Each second support component comprises: A third support rod, with the first end of the third support rod being connected to one of two adjacent first support components; A fourth support rod, with the first end of the fourth support rod being connected to the other of two adjacent first support components, and the second end of the fourth support rod being threadedly connected to the second end of the third support rod.

8. The support device for suppressing foundation pit deformation and building settlement according to claim 1, characterized in that, The support structure is at least one of a diaphragm wall and a pile support.

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