A loadable hierarchical deep foundation pit construction servo support system

Abstract

The utility model relates to deep foundation pit construction technology field, and disclose a kind of deep foundation pit construction servo support system of hierarchical loading, including foundation pit body, second support assembly and third support assembly, the side plate is fixedly installed in the inside along of foundation pit body, the side plate is fixedly installed with support in the end away from foundation pit body, the support is fixedly installed with crossbeam in the end away from foundation pit body, the end corner reinforcing component is fixedly installed in the four corners of foundation pit body near crossbeam one end, the horizontal support assembly is fixedly installed in the end away from foundation pit body of crossbeam. This deep foundation pit construction servo support system of hierarchical loading, through support adhering side plate and crossbeam, support rod enhances support rigidity, and second support assembly and third support assembly are same with the structure of first support assembly, multilayer distribution along foundation pit depth direction, form three-dimensional hierarchical support system, it is convenient to realize multistage loading and resist deep foundation pit lateral deformation.

Description

Technical Field

[0001] This utility model relates to the field of deep foundation pit construction technology, specifically a servo support system for deep foundation pit construction with graded loading. Background Technology

[0002] During the construction of foundation pit projects, the retaining structure of the foundation pit must be stable and not undergo large deformations that could lead to collapse. Furthermore, the foundation pit must not cause harmful deformations to the surrounding environment. When the requirements for controlling the surrounding environment of the foundation pit are strict, it is necessary to take proactive measures to control the deformation of the foundation pit. Generally, deep foundation pit construction uses support structures for reinforcement.

[0003] Early foundation pit support mainly consisted of reinforced concrete supports, which had high rigidity but also had problems such as difficulty in dismantling and waste of resources. Steel supports gradually became more popular due to their reusability and high construction efficiency. As construction progressed, servo systems, through the combination of hydraulic jacks and sensors, achieved active control of foundation pit deformation.

[0004] Chinese Invention Patent Publication No. CN115030189A discloses a construction method for a deep foundation pit concrete support servo system. The method involves suspending a concrete servo support structure in the deep foundation pit, installing servo jacks on the concrete servo support structure, and applying support force in stages through the servo jacks to continuously pressurize the underground continuous wall. This actively controls the impact of the underground continuous wall displacement on the safety of the deep foundation pit and reduces the risk of foundation pit collapse due to excessive deformation of the underground continuous wall during excavation.

[0005] However, the construction method of this deep foundation pit concrete support servo system did not design a corner reinforcement structure, which easily leads to poor strength at the corners of the support servo system, thus affecting normal construction. In addition, the lack of a multi-layer support structure makes it not only difficult to form a three-dimensional hierarchical support system, but also not easy to resist the lateral deformation of the deep foundation pit, resulting in poor overall practicality. Summary of the Invention

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a servo support system for deep foundation pit construction that can be graded and loaded. It can effectively solve the problems in the prior art, such as the lack of a corner reinforcement structure, which easily leads to poor strength at the corners of the support servo system, thus affecting normal construction, and the lack of a multi-layer support structure, which not only makes it difficult to form a three-dimensional graded support system, but also makes it difficult to resist the lateral deformation of deep foundation pits, resulting in poor overall practicality.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A graded loading deep foundation pit construction servo support system includes a foundation pit body, a second support component, and a third support component. A side plate is fixedly installed along the inner edge of the foundation pit body. A bracket is fixedly installed at the end of the side plate away from the foundation pit body. A crossbeam is fixedly installed at the end of the bracket away from the foundation pit body. Corner reinforcement components are fixedly installed at the four corners of the foundation pit body near the crossbeam. A horizontal support component is fixedly installed at the end of the crossbeam away from the foundation pit body. The horizontal support assembly includes a first connecting steel, a second servo jack is fixedly installed at the end of the first connecting steel away from the foundation pit body, a fixed column is fixedly installed at the output end of the second servo jack, and a second connecting steel is fixedly installed at the end of the fixed column away from the second servo jack.

[0008] Preferably, the corner reinforcement assembly includes a reinforcing steel, a first fixing steel and a second fixing steel, wherein a first servo jack is fixedly installed at the end of the first fixing steel near the second fixing steel.

[0009] Preferably, a slot is provided at one end of the reinforcing steel near the crossbeam, the slot corresponding to the crossbeam, and a positioning block is fixedly installed at the other end of the reinforcing steel away from the crossbeam.

[0010] The above technical solution involves connecting the corner reinforcement components to the crossbeam by using slots in the reinforcing steel. The components are then connected with bolts and secured with positioning blocks to prevent the reinforcing steel from shifting due to lateral pressure from the deep foundation pit, thus strengthening the support at the four corners of the foundation pit.

[0011] Preferably, a connecting column is fixedly installed at the output end of the first servo jack, and a second fixing steel is fixedly installed at the end of the connecting column away from the first servo jack.

[0012] Through the above technical solution, the first servo jack drives the second fixed steel to extend and retract through the connecting column, realizing graded loading in the corner area. At the same time, the supporting force of the first servo jack is evenly transferred to the second fixed steel, which facilitates the gradual application of support during the deep foundation pit excavation process.

[0013] Preferably, the first fixed steel, the first servo jack, the connecting column, and the second fixed steel are in one-to-one correspondence, and multiple identical first fixed steels, first servo jacks, connecting columns, and second fixed steels are provided, with the diameters of the multiple first fixed steels and second fixed steels distributed in an increasing manner.

[0014] The above technical solution forms a graded load-bearing system by using multiple first fixed steel bars with increasing diameters, first servo jacks, and connecting columns with second fixed steel bars. This system adapts to the load differences at different depths of the deep foundation pit corners, avoiding the risk of excessive pressure and overload damage to the corner reinforcement components caused by a single support component.

[0015] Preferably, the end of the second connecting steel away from the second servo jack is fixedly installed to the crossbeam, and a connecting seat is fixedly installed on the outer edge of the second connecting steel.

[0016] Through the above technical solution, the support force of the horizontal support component is transmitted to the horizontal beam by fixing the second connecting steel to the crossbeam, and the connection strength between the second connecting steel and the fixed column is enhanced by the connecting seat, so as to prevent the second servo jack from easily loosening.

[0017] Preferably, a fixing cover is fixedly installed at the end of the connecting seat away from the second connecting steel, and a fixing bolt is threadedly connected to the end of the fixing cover away from the second connecting steel. The fixing bolt passes through the fixing cover and is connected to the second connecting steel.

[0018] Through the above technical solution, the fixing cover is locked to the second connecting steel by the fixing bolt, which facilitates further improvement of the connection strength between the connecting seat and the second connecting steel and avoids loosening of the connection caused by deep foundation pit vibration.

[0019] Preferably, the bracket has an "L" shaped cross section, and a support rod is fixedly installed at the end of the bracket away from the side plate. The side plate, bracket, support rod, crossbeam, end corner reinforcement component and horizontal support component constitute the first support component. The second support component and the third support component have the same structure as the first support component.

[0020] Through the above technical solution, the support bracket is attached to the side plate and the crossbeam, the support rod enhances the rigidity of the support bracket, and the second and third support components have the same structure as the first support component. They are distributed in multiple layers along the depth of the foundation pit to form a three-dimensional hierarchical support system, which facilitates multi-level loading and resists lateral deformation of deep foundation pits.

[0021] Compared with the prior art, the servo support system for deep foundation pit construction with graded loading provided by this utility model has the following beneficial effects: 1. This graded loading deep foundation pit construction servo support system forms a graded load-bearing system through multiple first fixed steels, first servo jacks, and connecting columns with second fixed steels of increasing diameter. It adapts to the load differences at the corners of different depths in the deep foundation pit, avoiding the risk of excessive pressure and overload damage to the corner reinforcement components caused by a single support component. The support force of the horizontal support components is transferred to the crossbeam through the fixation of the second connecting steel to the crossbeam, and the connection strength between the second connecting steel and the fixed column is enhanced by the connecting seat, preventing the second servo jack from easily loosening.

[0022] 2. The graded loading deep foundation pit construction servo support system uses a bracket to fit the side plate and crossbeam, and the support rod enhances the rigidity of the bracket. The second and third support components have the same structure as the first support component and are distributed in multiple layers along the depth of the foundation pit to form a three-dimensional graded support system, which facilitates multi-level loading and resists lateral deformation of the deep foundation pit. Attached Figure Description

[0023] Figure 1 This is a first-view three-dimensional structural diagram of the graded loading deep foundation pit construction servo support system of this utility model. Figure 2 This is a second-view three-dimensional structural diagram of the graded loading deep foundation pit construction servo support system of this utility model. Figure 3 This is a first-view schematic diagram of the disassembled structure of the second and third support components of this utility model; Figure 4 This is a second-view schematic diagram of the split structure of the second and third support components of this utility model; Figure 5 This is a three-dimensional structural diagram of the side plate of this utility model; Figure 6 This is a schematic diagram of the disassembled structure of this utility model; Figure 7 This is a schematic diagram of the disassembled structure of the corner reinforcement component of this utility model; Figure 8 This is a three-dimensional structural diagram of the horizontal support component of this utility model.

[0024] The components include: 1. Pit body; 2. Side plate; 3. Bracket; 4. Support rod; 5. Crossbeam; 6. End corner reinforcement assembly; 601. Reinforcing steel; 602. Slot; 603. Positioning block; 604. First fixing steel; 605. First servo jack; 606. Connecting column; 607. Second fixing steel; 7. Horizontal support assembly; 701. First connecting steel; 702. Second servo jack; 703. Fixing column; 704. Second connecting steel; 705. Connecting seat; 706. Fixing cover; 707. Fixing bolt; 8. Second support assembly; 9. Third support assembly. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: like Figure 1-6 As shown, the deep foundation pit construction servo support system with graded loading provided by this utility model includes a foundation pit body 1, a second support component 8 and a third support component 9. A side plate 2 is fixedly installed at the inner edge of the foundation pit body 1. A bracket 3 is fixedly installed at the end of the side plate 2 away from the foundation pit body 1. A crossbeam 5 is fixedly installed at the end of the bracket 3 away from the foundation pit body 1. Corner reinforcement components 6 are fixedly installed at the four corners of the foundation pit body 1 near the end of the crossbeam 5. A horizontal support component 7 is fixedly installed at the end of the crossbeam 5 away from the foundation pit body 1.

[0027] See Figure 7 As shown, the corner reinforcement component 6 in this system includes a reinforcing steel 601, a first fixing steel 604 and a second fixing steel 607. A first servo jack 605 is fixedly installed on the end of the first fixing steel 604 near the second fixing steel 607.

[0028] See Figure 8 As shown, the horizontal support component 7 in this system includes a first connecting steel 701. A second servo jack 702 is fixedly installed at the end of the first connecting steel 701 away from the foundation pit body 1. A fixed column 703 is fixedly installed at the output end of the second servo jack 702. A second connecting steel 704 is fixedly installed at the end of the fixed column 703 away from the second servo jack 702.

[0029] Further integration Figure 7 As shown, in this corner reinforcement assembly 6, a slot 602 is provided at the end of the reinforcing steel 601 near the crossbeam 5, and the slot 602 corresponds to the crossbeam 5. A positioning block 603 is fixedly installed at the end of the reinforcing steel 601 away from the crossbeam 5. This arrangement, by having the slot 602 of the reinforcing steel 601 correspond to the crossbeam 5, enables the corner reinforcement assembly 6 to be spliced ​​with the crossbeam 5. Subsequently, it is connected by bolts, and the positioning block 603 assists in fixing the reinforcing steel 601, preventing the reinforcing steel 601 from shifting due to the lateral pressure of the deep foundation pit, and strengthening the support strength of the four corners of the foundation pit.

[0030] Furthermore, a connecting column 606 is fixedly installed at the output end of the first servo jack 605, and a second fixing steel 607 is fixedly installed at the end of the connecting column 606 away from the first servo jack 605. This configuration allows the first servo jack 605 to extend and retract via the connecting column 606, achieving graded loading in the corner area. Simultaneously, it evenly transmits the supporting force of the first servo jack 605 to the second fixing steel 607, facilitating the gradual application of support during deep foundation pit excavation.

[0031] Furthermore, the first fixed steel 604, the first servo jack 605, the connecting column 606, and the second fixed steel 607 are in a one-to-one correspondence. Multiple identical first fixed steel 604, first servo jack 605, connecting column 606, and second fixed steel 607 are provided, with the diameters of the multiple first fixed steel 604 and second fixed steel 607 distributed in an increasing order. This arrangement, through multiple first fixed steel 604, first servo jack 605, and connecting column 606 with second fixed steel 607 of increasing diameter, forms a graded load-bearing system. This adapts to the load differences at the corners of different depths in the deep foundation pit, avoiding the risk of excessive pressure and overload damage to the corner reinforcement component 6 caused by a single support component.

[0032] Example 2: Based on the scheme of Embodiment 1, this example further provides a specific configuration scheme for the horizontal support component 7.

[0033] Combination Figure 8 As shown, in the horizontal support assembly 7 provided in this example, the end of the second connecting steel 704 furthest from the second servo jack 702 is fixedly installed to the crossbeam 5, and a connecting seat 705 is fixedly installed on the outer edge of the second connecting steel 704. This arrangement, through the fixation of the second connecting steel 704 to the crossbeam 5, allows the supporting force of the horizontal support assembly 7 to be transmitted to the crossbeam 5, and the connecting seat 705 enhances the connection strength between the second connecting steel 704 and the fixed column 703, preventing the second servo jack 702 from easily loosening.

[0034] Furthermore, a fixing cover 706 is fixedly installed at the end of the connecting seat 705 away from the second connecting steel 704. A fixing bolt 707 is threadedly connected to the end of the fixing cover 706 away from the second connecting steel 704. The fixing bolt 707 passes through the fixing cover 706 and is connected to the second connecting steel 704. This arrangement of the fixing cover 706 and the second connecting steel 704 via the fixing bolt 707 further enhances the connection strength between the connecting seat 705 and the second connecting steel 704, preventing loosening of the connection due to vibration in the deep foundation pit.

[0035] Furthermore, in this example, the support 3 has an "L"-shaped cross-section. A support rod 4 is fixedly installed at the end of the support 3 furthest from the side plate 2. The side plate 2, support 3, support rod 4, crossbeam 5, end corner reinforcing component 6, and horizontal support component 7 constitute the first support assembly. The second and third support assemblies 8 and 9 have the same structure as the first support assembly. This arrangement, with the support 3 fitting snugly against the side plate 2 and crossbeam 5, and the support rod 4 enhancing the rigidity of the support 3, along with the second and third support assemblies 8 and 9 having the same structure as the first support assembly, forms a multi-layered, three-dimensional, graded support system. This facilitates multi-level loading and resists lateral deformation of deep foundation pits.

[0036] See Figures 1 to 8As shown, the graded loading servo support system for deep foundation pit construction formed based on the above example scheme, in use, achieves splicing of the corner reinforcement component 6 and the crossbeam 5 by corresponding the slot 602 of the reinforcing steel 601 with the crossbeam 5, and then connects them with bolts. The positioning block 603 assists in fixing the reinforcing steel 601, preventing the reinforcing steel 601 from shifting due to the lateral pressure of the deep foundation pit, thus strengthening the support strength at the four corners of the foundation pit. The first servo jack 605 drives the second fixed steel 607 to extend and retract through the connecting column 606, realizing graded loading in the corner area. Simultaneously, the supporting force of the first servo jack 605 is evenly transferred to the second fixed steel 607, facilitating the gradual application of support during the deep foundation pit excavation process. Through multiple first fixed steels 604 with increasing diameters, the first servo jacks 605, and the connecting columns 606 and second fixed steels 607, a graded bearing system is formed, adaptable to corners at different depths in the deep foundation pit. To mitigate the load differences, a single support component is used, which could easily lead to excessive pressure and overload damage to the corner reinforcement component 6. The second connecting steel 704 is fixed to the crossbeam 5, allowing the supporting force of the horizontal support component 7 to be transferred to the crossbeam 5. Furthermore, the connection strength between the second connecting steel 704 and the fixed column 703 is enhanced by the connecting seat 705, preventing the second servo jack 702 from loosening easily. The fixed cover 706 is locked to the second connecting steel 704 by the fixing bolt 707, which further improves the connection strength between the connecting seat 705 and the second connecting steel 704, preventing loosening caused by deep pit vibration. The bracket 3 is attached to the side plate 2 and the crossbeam 5, and the support rod 4 enhances the rigidity of the bracket 3. The second support component 8 and the third support component 9 have the same structure as the first support component, and are distributed in multiple layers along the depth of the pit, forming a three-dimensional hierarchical support system, which facilitates multi-level loading and resists lateral deformation of the deep pit.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A servo support system for deep foundation pit construction with graded loading, comprising a foundation pit body (1), a second support component (8), and a third support component (9), characterized in that: A side plate (2) is fixedly installed along the inner edge of the foundation pit body (1). A bracket (3) is fixedly installed at the end of the side plate (2) away from the foundation pit body (1). A crossbeam (5) is fixedly installed at the end of the bracket (3) away from the foundation pit body (1). An end corner reinforcement component (6) is fixedly installed at the four corners of the foundation pit body (1) near the end of the crossbeam (5). A horizontal support component (7) is fixedly installed at the end of the crossbeam (5) away from the foundation pit body (1). The horizontal support assembly (7) includes a first connecting steel (701), a second servo jack (702) is fixedly installed at one end of the first connecting steel (701) away from the foundation pit body (1), a fixed column (703) is fixedly installed at the output end of the second servo jack (702), and a second connecting steel (704) is fixedly installed at one end of the fixed column (703) away from the second servo jack (702).

2. The deep foundation pit construction servo support system with graded loading according to claim 1, characterized in that: The corner reinforcement assembly (6) includes a reinforcing steel (601), a first fixing steel (604), and a second fixing steel (607). A first servo jack (605) is fixedly installed on one end of the first fixing steel (604) near the second fixing steel (607).

3. The deep foundation pit construction servo support system with graded loading according to claim 2, characterized in that: The reinforcing steel (601) has a slot (602) at one end near the crossbeam (5), the slot (602) is opposite to the crossbeam (5), and a positioning block (603) is fixedly installed at the other end of the reinforcing steel (601) away from the crossbeam (5).

4. The servo support system for deep foundation pit construction with graded loading according to claim 2, characterized in that: A connecting column (606) is fixedly installed at the output end of the first servo jack (605), and a second fixing steel (607) is fixedly installed at the end of the connecting column (606) away from the first servo jack (605).

5. A servo support system for deep foundation pit construction with graded loading according to claim 2, characterized in that: The first fixed steel (604), the first servo jack (605), the connecting column (606), and the second fixed steel (607) are in one-to-one correspondence. Multiple copies of the first fixed steel (604), the first servo jack (605), the connecting column (606), and the second fixed steel (607) are provided. The diameters of the multiple first fixed steels (604) and second fixed steels (607) are distributed in an increasing manner.

6. The deep foundation pit construction servo support system with graded loading according to claim 1, characterized in that: The end of the second connecting steel (704) away from the second servo jack (702) is fixedly installed with the crossbeam (5), and a connecting seat (705) is fixedly installed on the outer edge of the second connecting steel (704).

7. The servo support system for deep foundation pit construction with graded loading according to claim 6, characterized in that: A fixing cover (706) is fixedly installed at one end of the connecting seat (705) away from the second connecting steel (704). A fixing bolt (707) is threadedly connected to one end of the fixing cover (706) away from the second connecting steel (704). The fixing bolt (707) passes through the fixing cover (706) and is connected to the second connecting steel (704).

8. A servo support system for deep foundation pit construction with graded loading according to claim 1, characterized in that: The bracket (3) has an "L" shaped cross section. A support rod (4) is fixedly installed at one end of the bracket (3) away from the side plate (2). The side plate (2), bracket (3), support rod (4), crossbeam (5), end corner reinforcement component (6) and horizontal support component (7) constitute the first support component. The second support component (8) and the third support component (9) have the same structure as the first support component.

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