Lifting system

Abstract

The invention belongs to the technical field of foundation pit engineering construction, and discloses a lifting system which is characterized in that a counter-force beam is arranged in a concrete block at the top of a foundation pit, a jack is arranged on the counter-force beam, one end of a steel strand is arranged on the jack, and the other end of the steel strand is connected to a temporary supporting system for providing steel support in the foundation pit; the lifting device is used for lifting and moving the temporary supporting system in a foundation pit. The lifting system can have good practicability under the conditions that the requirement for precision in a foundation pit is high and the requirement for single-point height adjustment exists, meanwhile, stable supporting is provided through the counter-force beam, the jack is used for lifting or descending the steel strand, one end of the steel strand is connected with the jack, and the other end of the steel strand is connected with the lifting platform. And one end of the hydraulic system is connected with the other end of the hydraulic system, and the other end of the hydraulic system is connected to a temporary supporting system for providing a steel support in a foundation pit, so that the hydraulic system can bear larger load on the basis of the same volume relative to an electric driving system, is more suitable for lifting and moving of the temporary supporting system in the foundation pit, and avoids repeated layer-by-layer mounting and dismounting of the steel support and a template.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit engineering construction, and in particular to a lifting system. Background Art

[0002] At present, in the conventional foundation pit excavation construction process, concrete support or steel support can be used as foundation pit support. Among them, concrete support has the advantages of large bearing capacity and economical cost, but it is necessary to carry out construction from the bottom form of the cushion layer, tie steel bars, pour concrete, and maintain the process to achieve the target strength. This process is not only long (usually takes more than seven days), but also cannot quickly form support within the elevation range during this process. The entire foundation pit will be in an unsupported working condition in the excavation layer, that is, the foundation pit will deform during this time period. On the other hand, although the steel support equipped with a servo axial force compensation system has a short installation time (usually takes six hours) and can quickly form support, when continuing to excavate the lower earthwork, due to the material characteristics of the steel support, the bearing capacity it provides is too low to meet the bearing capacity requirements of large and deep foundation pits, and it is difficult to reuse and has a high cost. Therefore, how to ensure that the foundation pit can quickly form support after excavation to the corresponding elevation, avoid the foundation pit from being exposed for a long time and causing large deformation, and effectively reduce the operating cost and improve the operating efficiency are the problems that people in this field need to solve. Summary of the invention

[0003] The purpose of the present invention is to provide a lifting system that can lift and move steel supports in a foundation pit, thereby ensuring that support can be quickly formed after the foundation pit is excavated to a corresponding elevation, avoiding the foundation pit from being exposed for a long time and causing large deformation, and effectively reducing operating costs and improving operating efficiency. Compared with systems such as winches, the lifting system of the present invention has smooth and synchronous lifting and lowering, and can be monitored in real time, ensuring that the entire system is always in the same plane during the lifting process, and even if there is a height difference, it can be controlled as a whole by adjusting the height of a single point.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A lifting system, comprising:

[0006] A reaction beam, a jack and a steel strand, wherein the reaction beam is arranged in a concrete block at the top of a foundation pit, the jack is installed on the reaction beam, one end of the steel strand is arranged on the jack, and the other end is connected to a temporary support system providing steel support in the foundation pit, and is used for the lifting and lowering movement of the temporary support system in the foundation pit.

[0007] Optionally, it also includes a hydraulic pump station, which is arranged on the reaction beam. The jack is connected to the hydraulic pump station through an oil pipe and a communication line to obtain a power source and operation instructions.

[0008] Optionally, the lifting system includes at least four reaction beams, four jacks, and four steel strands, and the reaction beams, the jacks, and the steel strands are arranged in a one-to-one correspondence.

[0009] Optionally, at least two reaction beams, two jacks and two steel strands are provided on opposite sides of the temporary support system.

[0010] As an option, the jack is capable of lifting or lowering the steel strand, and the length of the steel strand is greater than or equal to the depth of the foundation pit.

[0011] As an option, the jack is configured as a through-hole jack.

[0012] Optionally, a root anchor is also provided, and the steel strand is fixed to the temporary support system through the root anchor.

[0013] As an option, wherein the root anchor is arranged below the temporary support system, the steel strand can be fixed in the root anchor after passing through the temporary support system.

[0014] Optionally, the root anchors are arranged in one-to-one correspondence with the steel strands.

[0015] Optionally, after the foundation pit excavation work is completed, the steel strand can be removed from the temporary support system for reuse.

[0016] Beneficial effects of the present invention:

[0017] The reaction beam in the present invention can provide stable support for the entire lifting system, and the jack can lift or lower the steel strand. Furthermore, one end of the steel strand is connected to the jack, and the other end is connected to the temporary support system that provides steel support in the foundation pit. Therefore, under the action of the jack, the lifting and moving of the temporary support system in the foundation pit can be realized, thereby quickly forming support for the foundation pit and improving the working efficiency, avoiding the foundation pit from being exposed for a long time and causing large deformation. The lifting system in the present invention can be used repeatedly, which can effectively reduce the operating cost. Specifically, the reaction beam is set in the concrete block at the top of the foundation pit, so as to ensure that the temporary support system is lifted and lowered at the top of the foundation pit, avoid frequent movement of the position of the lifting system, and ensure that the lifting process will not be interfered with. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a lifting system according to an embodiment of the present invention;

[0019] Figure 2 is a schematic top view of a lifting system according to an embodiment of the present invention;

[0020] Figure 3 is a partial structural schematic diagram of a lifting system according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the lifting system according to an embodiment of the present invention in a use state.

[0022] In the figure:

[0023] 100-concrete; 200-lattice column; 300-earth to be excavated;

[0024] 10-temporary support system; 20-lifting system; 30-axis force servo system;

[0025] 11- steel support system; 12- concrete formwork; 13- bracket; 111- connecting rod; 112- steel support structure; 21- reaction beam; 22- hydraulic pump station; 23- jack; 24- steel strand; 201- root anchor. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] At present, in the conventional foundation pit excavation construction process, concrete support or steel support can be used as foundation pit support. Among them, concrete support has the advantages of large bearing capacity and economical cost, but it is necessary to carry out construction from the bottom form of the cushion layer, tie steel bars, pour concrete, and maintain the process to achieve the target strength. This process is not only long (usually takes more than seven days), but also cannot quickly form support within the elevation range during this process. The entire foundation pit will be in an unsupported working condition in the excavation layer, that is, the foundation pit will deform during this time period. On the other hand, although the steel support equipped with a servo axial force compensation system has a short installation time (usually takes six hours) and can quickly form support, when continuing to excavate the lower earthwork, due to the material characteristics of the steel support, the bearing capacity it provides is too low to meet the bearing capacity requirements of large and deep foundation pits, and it is difficult to reuse and has a high cost. Therefore, how to ensure that the foundation pit can quickly form support after excavation to the corresponding elevation, avoid the foundation pit from being exposed for a long time and causing large deformation, and effectively reduce the operating cost and improve the operating efficiency are the problems that people in this field need to solve.

[0030] The technical solution of this embodiment is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0031] like Figure 1-Figure 4 As shown, this embodiment provides a lifting system, including a reaction beam 21, a jack 23 and a steel strand 24. The reaction beam 21 is arranged in the concrete block at the top of the foundation pit, the jack 23 is installed on the reaction beam 21, one end of the steel strand 24 is arranged on the jack 23, and the other end is connected to a temporary support system 10 providing steel support in the foundation pit, and is used for the lifting and moving of the temporary support system 10 in the foundation pit.

[0032] Specifically, in this embodiment, the reaction beam 21 can provide stable support for the entire lifting system 20, and the jack 23 can lift or lower the steel strand 24. Furthermore, one end of the steel strand 24 is connected to the jack 23, and the other end is connected to the temporary support system 10 that provides steel support in the foundation pit. Therefore, under the action of the jack 23, the temporary support system 10 in the foundation pit can be lifted and moved, thereby quickly forming support for the foundation pit and improving the working efficiency, avoiding the foundation pit from being exposed for a long time and causing large deformation. In addition, the lifting system 20 in this embodiment can be used repeatedly, which can effectively reduce the operating cost. Specifically, the reaction beam 21 is set in the concrete block at the top of the foundation pit, so as to ensure that the temporary support system 10 is lifted and lowered at the top of the foundation pit, avoid frequent movement of the position of the lifting system 20, and ensure that the lifting process will not be interfered with.

[0033] The specific structure of the lifting system in this embodiment is described below.

[0034] like Figure 1-Figure 4As shown, the lifting system 20 in this embodiment includes a reaction beam 21, a hydraulic pump station 22, a jack 23 and a steel strand 24, and the steel strand 24 is connected to a temporary support system 10 that provides steel support in the foundation pit. Figure 3 and Figure 4 As shown, specifically, in this embodiment, the reaction beam 21 is set in the concrete 100 at the top of the foundation pit, and is located above the steel support structure 112 on both sides of the steel support system 11 in the temporary support system 10. In this embodiment, the temporary support system 10 is also provided with a concrete template 12 for pouring the concrete 100 to solidify and form it into a concrete block, and the reaction beam 21 is set in the concrete block at the top of the foundation pit, so as to ensure the stable placement of the lifting system 20 in the foundation pit, and the temporary support system 10 can always be lifted and moved at the top of the foundation pit. Further, the hydraulic pump station 22 and the jack 23 are both set on the reaction beam 21, and the jack 23 is set as a through-type jack, and the through-type jack is connected to the hydraulic pump station 22 through an oil pipe and a communication line to obtain a power source and operation instructions.

[0035] like Figure 2 As shown, in this embodiment, the steel strand 24 is connected to the central axis of the jack 23, and the steel strand 24 can ensure its mechanical strength. In other embodiments, other materials can also be selected, which is not limited here. Specifically, one end of the steel strand 24 is fixed to the jack 23 of the lifting system 20, and the other end is fixed below the connecting rod 111 of the temporary support system 10, and the jack 23 can lift or lower the steel strand 24, so that the connecting rod 111 can be lifted and lowered in the foundation pit under the drive of the steel strand 24, thereby realizing the synchronous lifting of the steel support structure 112 and the concrete formwork 12 above it, and realizing the lifting and lowering of the temporary support system 10 in the foundation pit. Figure 2 As shown, each lifting system 20 is provided with at least four reaction beams 21, four jacks 23, four hydraulic pump stations 22 and four steel strands 24, and the reaction beams 21, the jacks 23, the hydraulic pump stations 22 and the steel strands 24 are arranged one by one, and are arranged at intervals and located above the connecting rod 111, so that the connecting rod 111 can be lifted at multiple points to ensure the synchronization of its lifting and lowering movement.

[0036] Optionally, at least two reaction beams 21, two jacks 23, two hydraulic pump stations 22 and two steel strands 24 are provided on opposite sides of the temporary support system 10, so as to provide multi-point stable support for the temporary support system 10. Furthermore, the steel strands 24 in each lifting system 20 are respectively connected to the two ends of the connecting rod 111, and are fixed to the connecting rod 111 through the root anchor 201 to avoid falling off during the lifting and lowering of the connecting rod 111, causing greater safety accidents. Exemplarily, the root anchor 201 is arranged below the connecting rod 111, and the steel strands 24 can be fixed in the root anchor 201 after passing through the connecting rod 111, and the steel strands 24 are arranged one by one with the root anchor 201, so as to ensure that each steel strand 24 can be stably installed. After the foundation pit excavation work is completed, the connecting rod 111 and the root anchor 201 can be removed to separate the temporary support system 10 from the lifting system 20 for subsequent recovery and reuse, which will not be described in detail here.

[0037] On the other hand, Figure 1 and Figure 2 As shown, the lifting system 20 cooperates with the support combination to provide steel support or concrete support for the foundation pit. Specifically, the support combination includes a temporary support system 10 and an axial force servo system 30, and the support combination is connected to the lifting system 20 to form a foundation pit support device for temporary support of the foundation pit. Specifically, the foundation pit support device is mainly used for support and enclosure during foundation pit excavation to provide a higher bearing capacity for large and deep foundation pits and reduce foundation pit deformation. At the same time, each system in the foundation pit support device in this embodiment can be reused, which can effectively save operating costs. Optionally, the lifting system 20 is arranged at the top of the foundation pit, and the temporary support system 10 can provide concrete support or steel support for it in the foundation pit. Compared with the single support scheme in the prior art, it can improve the higher bearing capacity and have the advantages of rapid support to meet the needs of different foundation pits. Specifically, in this embodiment, the lifting system 20 can drive the temporary support system 10 to move up and down in the foundation pit, so as to support different positions inside the foundation pit. Furthermore, the axial force servo system 30 is arranged on the temporary support system 10 and is detachably connected to the side wall of the foundation pit, so as to ensure the stability of the steel support provided by the temporary support system 10 to the foundation pit, and enable the lifting system 20 to drive the temporary support system 10 and the axial force servo system 30 to move up and down as a whole in the foundation pit after unloading the axial force servo system 30.

[0038] Combination Figure 1-Figure 4As shown, in this embodiment, a plurality of lattice columns 200 are arranged at intervals in the foundation pit, and the plurality of lattice columns 200 are arranged parallel to and perpendicular to the bottom of the foundation pit. In this embodiment, the temporary support system 10 is sleeved on the lattice columns 200 and vertically connected to the lattice columns 200, thereby the temporary support system 10 can be guided and limited by the lattice columns 200, and corresponding support can also be provided to the temporary support system 10 to prevent its position from shaking and affecting the subsequent support effect. Further, in this embodiment, the temporary support system 10 and the lattice columns 200 are arranged perpendicular to each other.

[0039] like Figure 4 As shown, in this embodiment, there is earth 300 to be excavated in the foundation pit, and the temporary support system 10 is always located above the earth 300 to be excavated, so that the excavated area of ​​the foundation pit can be supported, thereby ensuring the smooth progress of subsequent excavation operations. For example, in this embodiment, both sides of the temporary support system 10 are provided with a lifting system 20, so that the lifting system 20 can simultaneously lift the entire temporary support system 10 to ensure the stable movement of the temporary support system 10 in the foundation pit. Further, in this embodiment, after the excavation of the foundation pit is completed, part of the structure of the temporary support system 10 can also be permanently buried in the foundation pit to ensure that the foundation pit can be constructed under the condition of support and to ensure the overall construction and installation; or, after the excavation of the foundation pit is completed, the entire structure of the temporary support system 10 can be completely disassembled in the foundation pit, and then taken out of the foundation pit by a hoisting machine, so as to achieve the reuse of the foundation pit support device and improve the economy of the operation.

[0040] like Figure 1-Figure 3As shown, specifically, the temporary support system 10 in this embodiment includes a steel support system 11, a concrete formwork 12 and a bracket 13. Optionally, concrete 100 can be poured in the concrete formwork 12, and after the concrete 100 is solidified and formed, a concrete block can be formed to provide concrete support for the foundation pit. Further, the steel support system 11 is located below the concrete formwork 12 and can provide steel support for the foundation pit, so that the foundation pit support device can provide a concrete pouring formwork in the foundation pit through the concrete formwork 12 and the steel support system 11 to achieve the effect of concrete support and steel support. By way of example, in this embodiment, the concrete 100 formed in the concrete formwork 12 and the steel support system 11 can alternately provide support for the foundation pit, that is, after the concrete 100 solidifies and forms in the concrete formwork 12 to gradually provide concrete support for the foundation pit, the steel support system 11 unloads force at both ends so that only concrete support exists in the foundation pit, until the steel support system 11 moves down to pour concrete at the next position, and the steel support system 11 provides steel support effect for the foundation pit again, thereby reducing the deformation of the foundation pit and effectively extending the service life of the foundation pit support device, improving the quality and efficiency of support protection, and thus improving the efficiency of excavation operations. By way of example, both ends of the steel support system 11 are provided with an axial force servo system 30, thereby ensuring the steel support effect of the steel support system 11 at both ends on the inner wall of the foundation pit, and after the force is unloaded and disassembled between the axial force servo system 30 and the side wall of the foundation pit, the steel support system 11 and the axial force servo system 30 can be moved synchronously until the next position to provide steel support for the foundation pit again through the axial force servo system 30.

[0041] like Figure 2 and Figure 3As shown, in this embodiment, the steel support system 11 includes a connecting rod 111 and a steel support structure 112. Specifically, the connecting rod 111 and the steel support structure 112 are arranged perpendicular to each other, and each steel support system 11 is provided with a plurality of connecting rods 111 and steel support structures 112. Exemplarily, a plurality of steel support structures 112 are arranged in parallel and at intervals, and every two steel support structures 112 are arranged as a group, and an axial force servo system 30 is arranged at both ends of each group of steel support structures 112, so that the axial force servo system 30 can realize the stable placement of the steel support structure 112 in the foundation pit to provide a stable steel support effect for the foundation pit. Furthermore, a plurality of connecting rods 111 are arranged in parallel and at intervals on the steel support structure 112 to connect all the steel support structures 112, that is, the steel support structure 112 and the connecting rod 111 constitute a horizontal and vertical combination. Specifically, the steel support structures 112, the connecting rods 111 and the lattice columns 200 are arranged perpendicular to each other in pairs, and the two ends of the connecting rods 111 are respectively connected to the lifting system 20, so that when the connecting rods 111 are lifted and moved by the lifting system 20, all the steel support structures 112 can be driven to move synchronously with them, thereby realizing the synchronous movement of the entire steel support system 11. Optionally, each group of steel support structures 112 is arranged corresponding to the same column of lattice columns 200. Exemplarily, a steel support structure 112 is arranged on both sides of each column of lattice columns 200, and a bracket 13 is sleeved on the outside of each lattice column 200, and the bottom of each group of steel support structures 112 is erected above a bracket 13, so as to ensure a stable connection between the steel support system 11 and the lattice column 200.

[0042] Combination Figure 2-Figure 4As shown, in this embodiment, the concrete formwork 12 is arranged above the steel support system 11, and the concrete 100 can be poured in the concrete formwork 12. Exemplarily, in this embodiment, the concrete formwork 12 includes a first chamber, a second chamber, and a third chamber. Specifically, the first chamber is arranged between the steel support structure 112 on both sides of the steel support system 11 and the outer side of the lattice column 200, the second chamber is arranged between the steel support structure 112 on both sides of the steel support system 11 and the inner side of the lattice column 200, and the third chamber is arranged on both sides of the lattice column 200 corresponding to the steel support structure 112 located in the middle of the steel support system 11. Specifically, the first chamber, the second chamber, and the third chamber are interconnected, and the three are arranged along the length direction of the steel support structure 112. Furthermore, the outer wall of the first chamber is higher than the side walls of the second chamber and the third chamber, and the concrete formwork 12 is integrated, so that after the concrete 100 fills the first chamber, the second chamber and the third chamber, it can be continuously poured above the first chamber, the second chamber and the third chamber under the enclosure of the outer wall of the first chamber until the concrete 100 in the three chambers is connected to form a whole. Further, after all the concrete 100 is poured and solidified, the concrete formwork 12 is demoulded. At this time, the formed concrete 100 can provide concrete support for the foundation pit, avoid deformation of the foundation pit, and facilitate the concrete formwork 12 and the steel support system 11 to move together in the foundation pit to perform new concrete 100 pouring and solidification operations at the next position, until multiple layers of formed concrete 100 are arranged from the top to the bottom in the foundation pit, ensuring the stability of the foundation pit and reducing deformation.

[0043] For example, before pouring concrete 100 in the first chamber, the second chamber, and the third chamber in this embodiment, the foundation pit support device mainly supports the foundation pit with steel through the steel support system 11 and the axial force servo systems 30 at both ends; when the concrete 100 in the concrete formwork 12 is solidified and formed and can support the foundation pit with concrete, the axial force servo systems 30 at both ends of the steel support system 11 adaptively unload the force, so that the foundation pit is mainly supported by concrete, thereby realizing the alternating effect of concrete support and steel support. Furthermore, the steel support system 11 and the axial force servo system 30 can be lowered to the next position of the foundation pit at the same time through the lifting system 20, and then the above steps can be repeated to realize multi-layer concrete support, and the steel support and concrete support at each position can act alternately, effectively reducing the deformation of the foundation pit.

[0044] Combination Figure 4As shown, illustratively, in this embodiment, the bracket 13 and the steel support system 11 are detachably connected, so that when the concrete 100 is solidified and formed, the bracket 13 can be lowered to the next position first, and it can be set and fixed on the lattice column 200, and then after the concrete formwork 12 is demoulded, the steel support system 11 and the concrete formwork 12 can be stably erected on the bracket 13 after being lowered to the target position, so as to ensure the stability of the temporary support system 10. Optionally, the cross-section of the bracket 13 in this embodiment is triangular to improve the stability of the support for the steel support system 11. Exemplarily, the bracket 13 is also arranged along the length direction of the steel support structure 112, and a bracket 13 is correspondingly arranged on each column of the lattice column 200, that is, a bracket 13 is correspondingly arranged on each group of steel support structures 112, so as to ensure the stability of the entire structure. Further, the bracket 13 is always located above the earthwork 300 to be excavated. In other embodiments, a bracket 13 may be provided on each lattice column 200, and the size of the bracket 13 may be set as required, which is not limited here. For example, in the temporary support system 10 of this embodiment, the steel support system 11, the concrete formwork 12 and the bracket 13 can all be disassembled, and the corresponding disassembly method can be set according to actual needs, which will not be described in detail here.

[0045] For example, in this embodiment, the axial force servo system 30 can also be set as a jack structure to ensure that the steel support system 11 provides stable steel support for the foundation pit. In other embodiments, other power devices can also be selected to ensure the axial force applied to the foundation pit by both ends of the steel support structure 112. Specifically, the axial force servo system 30 is set at both ends of the steel support structure 112 of the steel support system 11 in the temporary support system 10, so that when the temporary support system 10 alternately provides concrete support and steel support for the foundation pit, the axial force servo system 30 can adaptively apply or remove force to the side wall of the foundation pit to ensure the alternating use of the two supports.

[0046] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A lifting system, characterized in that: include: A reaction beam (21), a jack (23) and a steel strand (24), wherein the reaction beam (21) is arranged in a concrete block at the top of a foundation pit, the jack (23) is installed on the reaction beam (21), one end of the steel strand (24) is arranged on the jack (23), and the other end is connected to a temporary support system (10) providing steel support in the foundation pit, and is used for the lifting and lowering movement of the temporary support system (10) in the foundation pit.

2. The lifting system according to claim 1, characterized in that: It also includes a hydraulic pump station (22), which is arranged on the reaction beam (21), and the jack (23) is connected to the hydraulic pump station (22) through an oil pipe and a communication line to obtain a power source and an operation instruction.

3. The lifting system according to claim 1, characterized in that: The lifting system comprises at least four reaction beams (21), four jacks (23), and four steel strands (24), and the reaction beams (21), the jacks (23), and the steel strands (24) are arranged in a one-to-one correspondence.

4. The lifting system according to claim 3, characterized in that: At least two reaction beams (21), two jacks (23) and two steel strands (24) are arranged on opposite sides of the temporary support system (10).

5. The lifting system according to claim 1, characterized in that: The jack (23) can lift or lower the steel strand (24), and the length of the steel strand (24) is greater than or equal to the depth of the foundation pit.

6. The lifting system according to claim 1, characterized in that: The jack (23) is configured as a through-hole jack.

7. The lifting system according to claim 1, characterized in that: A root anchor (201) is also provided, and the steel strand (24) is fixed to the temporary support system (10) via the root anchor (201).

8. The lifting system according to claim 7, characterized in that: The seeding anchor (201) is arranged below the temporary support system (10), and the steel strand (24) can be fixed in the seeding anchor (201) after passing through the temporary support system (10).

9. The lifting system according to claim 7, characterized in that: The root anchors (201) are arranged in one-to-one correspondence with the steel strands (24).

10. The lifting system according to claim 1, characterized in that: After the foundation pit excavation operation is completed, the steel strand (24) can be removed from the temporary support system (10) for reuse.

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