A deep foundation pit pile anchor support structure

Abstract

This utility model relates to the field of building engineering technology and discloses a deep foundation pit pile-anchor support structure, including multiple retaining plates. Two threaded cylinders are fixedly connected to the exterior of each retaining plate, and threaded anchor rods are threadedly connected to the interior of each threaded cylinder. Installation grooves are provided at both ends of each retaining plate, and installation components are installed inside each installation groove. The retaining plates are fixedly connected via these installation components, and connecting parts are fixedly connected inside each retaining plate. In this utility model, the retaining plates are anchored by the threaded cylinders and threaded anchor rods, and the retaining plates are connected by installation grooves, installation bolts, and installation nuts. This achieves the effects of effectively bearing earth pressure, limiting foundation pit deformation, dispersing the pressure on the retaining plates, preventing displacement and overturning, enhancing overall connectivity, decomposing and transmitting earth pressure, ensuring the safety of deep foundation pit construction, and creating a stable construction environment for subsequent projects.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a deep foundation pit pile anchor support structure. Background Technology

[0002] Deep foundation pit pile-anchor support structures are crucial for ensuring the safety of deep foundation pit construction in the building engineering field. They are widely used in the construction of basements of high-rise buildings, subway stations, and underground utility tunnels. By transferring the lateral pressure of the soil to a stable stratum, they prevent the collapse of the foundation pit sidewalls. Their working principle is to use piles or retaining plates to directly contact the soil on the foundation pit sidewalls, bearing and blocking the soil pressure to form an integrated stress system. As urban construction continues to expand into underground spaces, the scale and depth of deep foundation pits are constantly increasing, placing higher demands on the bearing capacity, stability, and deformation control capabilities of pile-anchor support structures.

[0003] Existing deep foundation pit pile-anchor support structures suffer from concentrated pressure in practical applications. Currently, traditional pile-anchor support structures mainly rely on retaining piles or retaining plates to bear the lateral pressure of the soil and transfer the load to the stable soil layer through anchor rods. During construction, the connection nodes between the anchor rods and the retaining components, as well as the key parts of the support system, bear the main stress. This design, to a certain extent, achieves support for the sidewalls of the foundation pit and avoids the risk of foundation pit collapse due to excessive soil pressure.

[0004] However, due to the relatively simple connection methods and force transmission paths of existing support structures, pressure is excessively concentrated in local areas. Anchors are connected to retaining members through point anchoring. When the lateral pressure of the soil increases, the connection nodes between the anchors and the retaining members will bear large concentrated loads, causing local stress exceeding limits, resulting in cracking of the retaining members or anchor failure. The support system adopts rigid connections, which cannot effectively disperse and regulate pressure, causing pressure to concentrate at the contact points between the support and the retaining members, accelerating structural fatigue damage. When encountering differences in local soil properties or fluctuations in groundwater levels, the stress state cannot be adjusted in time, further aggravating the pressure concentration phenomenon. This not only reduces the overall bearing capacity and service life of the support structure, but also increases the safety hazards of deep foundation pit construction, limiting the application of traditional pile-anchor support structures in complex projects. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a deep foundation pit pile anchor support structure, which aims to improve the problem that when the lateral pressure of the soil increases, the connection node between the anchor rod and the retaining member will bear a large concentrated load, causing local stress to exceed the limit, resulting in cracking of the retaining member or anchor rod anchorage failure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a deep foundation pit pile anchor support structure, comprising multiple retaining plates, each retaining plate having two threaded cylinders fixedly connected to its exterior, each threaded cylinder having a threaded anchor rod threadedly connected to its interior, each retaining plate having an installation groove at both ends, each installation groove having an installation component inside, each retaining plate being fixedly connected via the installation component, each retaining plate having a connector fixedly connected to its interior, each connector having a slot at its top, each slot having a diagonal brace inside, and each diagonal brace having its ends fixed via a fixing mechanism.

[0007] As a further description of the above technical solution:

[0008] The fixing mechanism includes multiple U-shaped locks, which are respectively engaged at the top ends of multiple diagonal braces. Multiple mounting holes are provided on the top of each of the multiple connectors. The bottom ends of each of the multiple U-shaped locks pass through the interior of the multiple mounting holes. Threaded walls are provided on the bottom of each of the multiple U-shaped locks. Fixing nuts are threaded to the outside of each of the multiple threaded walls. Two elastic washers are attached to the bottom of each of the multiple connectors. The multiple U-shaped locks pass through the interior of the multiple elastic washers.

[0009] As a further description of the above technical solution:

[0010] The mounting assembly includes multiple mounting bolts, each of which passes through the interior of multiple mounting slots, and each of the mounting bolts has a mounting nut threaded to its end.

[0011] As a further description of the above technical solution:

[0012] The fixing mechanism also includes multiple anti-slip pads, which are respectively attached to the top of multiple fixing nuts.

[0013] As a further description of the above technical solution:

[0014] Each of the retaining walls has a fixed anti-fall net inside, and each of the anti-fall nets adopts an X-shaped mesh design.

[0015] As a further description of the above technical solution:

[0016] Each of the multiple connectors has a hook fixedly connected to an adjacent side, and the exterior of each of the multiple hooks is designed to be wear-resistant.

[0017] As a further description of the above technical solution:

[0018] Each of the multiple threaded anchor rods has a hexagonal head fixedly connected to one adjacent end, and the exterior of each of the multiple hexagonal heads is chamfered.

[0019] As a further description of the above technical solution:

[0020] The ends of the multiple threaded anchor rods that are furthest from each other are all tapered, and the dimensions of the multiple threaded anchor rods are all matched.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the retaining plate is anchored by the threaded cylinder and the threaded anchor rod, and the retaining plate is connected by the mounting groove, the mounting bolt and the mounting nut. The connecting parts, the slot and the diagonal brace decompose the lateral pressure, which achieves the effect of effectively bearing the soil pressure, limiting the deformation of the foundation pit, dispersing the pressure on the retaining plate, preventing displacement and overturning, enhancing the overall connection, decomposing and transmitting the soil pressure, ensuring the safety of deep foundation pit construction, and creating a stable construction environment for subsequent projects.

[0023] 2. In this utility model, the U-shaped lock engages with the end of the diagonal brace and passes through the mounting hole of the connector. The fixing nut is tightened and pressed down on the U-shaped lock to achieve fastening. The elastic gasket buffers the pressure and absorbs vibration, thus achieving the effect of stabilizing and fixing the diagonal brace and enhancing the stability of the support structure. This ensures that the diagonal brace reliably shares the load of the retaining plate, avoids loosening due to vibration, evenly distributes pressure to prevent damage to components, and effectively improves the deformation resistance and safety of the deep foundation pit pile anchor support structure. Attached Figure Description

[0024] Figure 1 This is a top view of a deep foundation pit pile anchor support structure proposed in this utility model;

[0025] Figure 2 This is a structural exploded view of the installation components in a deep foundation pit pile anchor support structure proposed in this utility model;

[0026] Figure 3 This is a structural schematic diagram of a connecting component in a deep foundation pit pile anchor support structure proposed in this utility model;

[0027] Figure 4 This is a structural breakdown diagram of the fixing mechanism in a deep foundation pit pile anchor support structure proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the threaded anchor rod in a deep foundation pit pile anchor support structure proposed in this utility model.

[0029] Legend:

[0030] 1. Retaining plate; 2. Fixing mechanism; 201. U-lock; 202. Mounting hole; 203. Threaded wall; 204. Fixing nut; 205. Elastic washer; 206. Anti-slip pad; 3. Threaded cylinder; 4. Threaded anchor rod; 5. Mounting groove; 6. Connector; 7. Slot; 8. Diagonal brace; 9. Mounting bolt; 10. Mounting nut; 11. Fall protection net; 12. Hook; 13. Hexagonal head. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0032] Reference Figure 1 , Figure 2 and Figure 3 The present invention provides an embodiment of a deep foundation pit pile anchor support structure, comprising multiple retaining plates 1, each retaining plate 1 having two threaded cylinders 3 fixedly connected to its exterior, each threaded cylinder 3 having a threaded anchor rod 4 threadedly connected to its interior, each retaining plate 1 having an installation groove 5 at both ends, each installation groove 5 having an installation component inside, each retaining plate 1 being fixedly connected by the installation component, each installation component having multiple installation bolts 9, each installation bolt 9 passing through the interior of the multiple installation grooves 5, each installation bolt 9 having an installation nut 10 threadedly connected to its end, each retaining plate 1 having a connector 6 fixedly connected to its interior, each connector 6 having a slot 7 at its top, each slot 7 having a diagonal brace 8 inside, each diagonal brace 8 having both ends fixed by a fixing mechanism 2;

[0033] Specifically, multiple retaining plates 1, as the main load-bearing components of the support structure, directly contact the soil on the sidewall of the deep foundation pit and bear the lateral pressure of the soil. Two threaded cylinders 3 are fixedly connected to the outside of each retaining plate 1, providing installation channels for threaded anchor rods 4. The threaded anchor rods 4 are screwed into the soil through the threaded engagement with the threaded cylinders 3. During screwing, the threaded anchor rods 4 rely on the friction between the threaded structure and the soil to anchor the retaining plate 1 in a stable soil area, thereby dispersing the lateral pressure on the retaining plate 1 and preventing displacement or overturning. The mounting grooves 5 at both ends of the retaining plates 1 cooperate with the installation components to achieve connection and fixation between the retaining plates 1. During installation, multiple mounting bolts 9 are passed through the mounting grooves 5 of adjacent retaining plates 1, and mounting nuts 10 are threaded onto the ends of the mounting bolts 9. By tightening the mounting nuts 10, adjacent retaining plates 1 are tightly fitted together, forming a continuous retaining structure. This connection method not only enhances the overall integrity between the retaining plates 1... In addition to its inherent stability, the retaining plate 1 also effectively transmits earth pressure, ensuring the stability of the entire support structure. The connecting piece 6, which is fixedly connected inside the retaining plate 1, has a slot 7 at its top for installing the diagonal brace 8. The two ends of the diagonal brace 8 are fixed to the bottom of the foundation pit and the connecting piece 6 respectively through the fixing mechanism 2. The diagonal brace 8 is set at an angle, decomposing the lateral earth pressure on the retaining plate 1 into a horizontal component. The horizontal component is transmitted to other connecting pieces 6 through the diagonal brace 8, thereby reducing the lateral deformation of the retaining plate 1. During the deep foundation pit excavation, as the soil is continuously removed, the soil pressure on the side wall of the foundation pit gradually increases. The threaded anchor 4 provides pull-out resistance to the retaining plate 1 through the anchoring effect with the soil. The installation components ensure a reliable connection between the retaining plates 1, forming an overall force system, effectively decomposing and transmitting the earth pressure, enabling the deep foundation pit pile anchor support structure to withstand the lateral soil pressure, limiting the deformation of the foundation pit side wall, ensuring the safety of deep foundation pit construction, and creating a stable construction environment for subsequent engineering operations.

[0034] Reference Figure 1 , Figure 3 and Figure 4 The fixing mechanism 2 includes multiple U-shaped locks 201, which are respectively engaged at the top ends of multiple diagonal braces 8. Multiple mounting holes 202 are opened on the top of multiple connectors 6. The bottom ends of multiple U-shaped locks 201 pass through the interior of multiple mounting holes 202. Threaded walls 203 are opened on the bottom of multiple U-shaped locks 201. Fixing nuts 204 are threaded to the outside of multiple threaded walls 203. Two elastic washers 205 are attached to the bottom of multiple connectors 6. Multiple U-shaped locks 201 pass through the interior of multiple elastic washers 205.

[0035] Specifically, multiple U-shaped locks 201 are respectively engaged at both ends of the top of multiple diagonal braces 8, forming a preliminary limiting position. The opening structure of the U-shaped locks 201 is adapted to the shape of the diagonal braces 8, allowing them to tightly wrap around the ends of the diagonal braces 8 and restrict the horizontal displacement of the diagonal braces 8. Multiple mounting holes 202 on the top of the connector 6 provide a channel for the U-shaped locks 201 to pass through. During installation, the bottom end of the U-shaped lock 201 is inserted into the mounting hole 202, allowing the U-shaped lock 201 to pass through the connector 6. The threaded wall 203 on the bottom of the U-shaped lock 201 and the fixing nut 204 form a... A fastening structure is formed. After the U-lock 201 passes through the mounting hole 202, the fixing nut 204 is threaded onto the outside of the threaded wall 203. By rotating the fixing nut 204, it moves downward along the threaded wall 203. As the fixing nut 204 gradually tightens, the U-lock 201 is pressed down, tightly fixing the end of the diagonal brace 8 to the connector 6. During this process, the tightening force of the fixing nut 204 ensures that there is no relative slippage between the diagonal brace 8 and the connector 6, ensuring the reliability of force transmission. The two elastic washers 205 attached to the bottom of the connector 6 are used for fixing. During the process, the U-shaped lock 201 acts as a buffer and pressure regulator, penetrating the elastic washer 205. When the fixing nut 204 is tightened, the elastic washer 205 undergoes elastic deformation due to the compression of the U-shaped lock 201 and the connecting piece 6. On the one hand, the reaction force generated by the elastic deformation evenly disperses the pressure of the U-shaped lock 201 on the connecting piece 6, preventing damage caused by local stress concentration around the mounting hole 202. On the other hand, during the construction of deep foundation pits, if the support structure is subjected to soil pressure fluctuations or vibrations, the elastic deformation capacity of the elastic washer 205 can absorb the impact force. To prevent the U-lock 201 and the fixing nut 204 from loosening due to vibration, and to ensure the stable fixing state of the diagonal brace 8, when the deep foundation pit support system is in operation, the diagonal brace 8 transmits the lateral soil pressure transmitted by the retaining plate 1 to the connector 6 through the U-lock 201. The tightening force of the fixing nut 204, the buffering effect of the elastic washer 205 and the limiting function of the U-lock 201 work together to make the diagonal brace 8 firmly connected to the connector 6, ensuring that the diagonal brace 8 effectively shares the load of the retaining plate 1 and enhances the overall stability and deformation resistance of the deep foundation pit pile anchor support structure.

[0036] Reference Figure 1 , Figure 4 and Figure 5 The fixing mechanism 2 also includes multiple anti-slip pads 206, which are respectively attached to the top of multiple fixing nuts 204; multiple retaining plates 1 are all fixedly connected to fall protection nets 11, which are all designed with an X-shaped mesh; multiple connectors 6 are all fixedly connected to hooks 12 on adjacent sides, which are all designed with wear resistance; multiple threaded anchor rods 4 are all fixedly connected to hexagonal heads 13 on adjacent ends, which are all designed with chamfers; multiple threaded anchor rods 4 are all designed with tapered ends, and the dimensions of multiple threaded anchor rods 4 are all matched.

[0037] Specifically, the anti-slip pad 206 in the fixing mechanism 2 is attached to the top of the fixing nut 204. When the fixing nut 204 is tightened, the anti-slip pad 206 forms friction with the fixing nut 204 and the bottom of the U-lock 201. During the deep foundation pit construction, when the support structure is affected by soil pressure or vibration, this friction prevents the fixing nut 204 from loosening, ensuring the fixing effect of the U-lock 201 on the diagonal brace 8 and maintaining the stable connection between the diagonal brace 8 and the connector 6. The X-shaped mesh fall arrest net 11 fixed inside the retaining plate 1 plays a protective role when construction personnel or tools accidentally fall. The fall arrest net 11, with the mechanical properties of the X-shaped mesh structure, disperses the impact force of falling objects, avoids excessive local stress leading to damage, and restricts the trajectory of falling objects to prevent them from falling into the foundation pit and causing safety accidents, providing safety for construction personnel. The hook 12 fixed on one side of the connector 6 is used to hang construction tools or safety ropes. Construction personnel can hang tools on the hook 12 for easy access. To prevent tools from falling, the safety rope is secured by hook 12, providing additional safety protection for construction workers. The wear-resistant design of hook 12 ensures that it is not easily damaged during long-term hanging and retrieval operations, guaranteeing functional reliability. The hexagonal head 13 at one end of the threaded anchor rod 4 provides a force application point for installation. During construction, the operator uses a hexagonal wrench in conjunction with the hexagonal head 13 to screw the threaded anchor rod 4 into the soil by rotating the hexagonal head 13. The chamfered design of the hexagonal head 13 facilitates quick alignment and engagement of the wrench, improving installation efficiency. The tapered design at the other end of the threaded anchor rod 4 reduces resistance when screwing into the soil, guiding the threaded anchor rod 4 smoothly into the predetermined position. The matching size of the threaded anchor rod 4 ensures that the anchoring strength of each retaining plate 1 is consistent, making the entire support structure uniformly stressed. During deep foundation pit construction, the anti-slip pad 206 ensures the stable connection of the fixing mechanism 2, the fall protection net 11 prevents personnel and tools from falling, the hook 12 assists in safe construction operations, and the hexagonal head 13 and tapered end design of the threaded anchor rod 4 contribute to efficient anchoring.

[0038] Working principle: Multiple retaining plates 1 directly contact the soil on the sidewall of the deep foundation pit, bearing the lateral pressure of the soil. Two threaded cylinders 3 are fixedly connected to the outside of each retaining plate 1, providing an installation channel for threaded anchor rods 4. The threaded anchor rods 4 are screwed into the soil through the threaded engagement with the threaded cylinders 3. During screwing, the threaded anchor rods 4 rely on the friction between the threaded structure and the soil to anchor the retaining plate 1 in a stable soil area, thereby dispersing the lateral pressure on the retaining plate 1 and preventing displacement or overturning. The mounting grooves 5 at both ends of the retaining plate 1 cooperate with the installation components to achieve connection and fixation between the retaining plates 1. During installation, multiple mounting bolts 9 are inserted through the mounting grooves 5 of adjacent retaining plates 1, and... Installing nuts 10 are threaded onto the ends of the mounting bolts 9. By tightening the mounting nuts 10, adjacent retaining plates 1 are tightly fitted together to form a continuous retaining structure. This connection method not only enhances the integrity between the retaining plates 1, but also effectively transmits earth pressure and ensures the stability of the entire support structure. The connector 6 is fixedly connected inside the retaining plate 1. The slot 7 opened at the top of the connector 6 is used to install the diagonal brace 8. The two ends of the diagonal brace 8 are fixed to the bottom of the pit and the connector 6 respectively through the fixing mechanism 2. The diagonal brace 8 is set at an angle to decompose the lateral earth pressure on the retaining plate 1 into a horizontal component. The horizontal component is transmitted to other connectors 6 through the diagonal brace 8, thereby reducing the lateral deformation of the retaining plate 1.

[0039] Furthermore, multiple U-shaped locks 201 are respectively engaged at both ends of the top of multiple diagonal braces 8. The opening structure of the U-shaped locks 201 is adapted to the shape of the diagonal braces 8, allowing them to tightly wrap around the ends of the diagonal braces 8 and restrict the horizontal displacement of the diagonal braces 8. Multiple mounting holes 202 on the top of the connector 6 provide a passage for the U-shaped locks 201 to pass through. During installation, the bottom end of the U-shaped lock 201 is inserted into the mounting hole 202, allowing the U-shaped lock 201 to pass through the connector 6. The threaded wall 203 at the bottom of the U-shaped lock 201 and the fixing nut 204 form a fastening structure. After the U-shaped lock 201 passes through the mounting hole 202, the fixing nut 204 is threaded onto the outside of the threaded wall 203. By rotating the fixing nut 204, it moves downward along the threaded wall 203. As the fixing nut 204 gradually tightens, the U-shaped lock 201 is pressed down, tightly fixing the ends of the diagonal braces 8 to the connector 6. During this process, the tightening force of the fixing nut 204 ensures that there is no relative slippage between the diagonal brace 8 and the connector 6, guaranteeing the reliability of force transmission. The two elastic washers 205 attached to the bottom of the connector 6 play a role in buffering and pressure regulation during the fixing process. The U-shaped lock 201 passes through the elastic washers 205. When the fixing nut 204 is tightened, the elastic washers 205 undergo elastic deformation due to the compression of the U-shaped lock 201 and the connector 6. On the one hand, the reaction force generated by the elastic deformation evenly disperses the pressure of the U-shaped lock 201 on the connector 6, avoiding damage caused by local stress concentration around the mounting hole 202. On the other hand, during the construction of the deep foundation pit, if the support structure is subjected to soil pressure fluctuations or vibrations, the elastic deformation capacity of the elastic washers 205 can absorb the impact force, preventing the U-shaped lock 201 and the fixing nut 204 from loosening due to vibration, and ensuring the stability of the fixed state of the diagonal brace 8.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A deep foundation pit pile anchor support structure, comprising multiple retaining plates (1), characterized in that: Two threaded cylinders (3) are fixedly connected to the outside of each of the multiple retaining plates (1). Threaded anchor rods (4) are threadedly connected inside each of the multiple threaded cylinders (3). Installation grooves (5) are opened at both ends of each of the multiple retaining plates (1). Installation components are provided inside each of the multiple installation grooves (5). The multiple retaining plates (1) are fixedly connected through the installation components. Connectors (6) are fixedly connected inside each of the multiple retaining plates (1). Slots (7) are opened at the top of each of the multiple connectors (6). Diagonal braces (8) are provided inside each of the multiple slots (7). Both ends of the multiple diagonal braces (8) are fixed by a fixing mechanism (2).

2. The deep foundation pit pile anchor support structure according to claim 1, characterized in that: The fixing mechanism (2) includes multiple U-shaped locks (201), which are respectively engaged at the top ends of multiple diagonal braces (8). Multiple mounting holes (202) are provided on the top of multiple connectors (6). The bottom ends of multiple U-shaped locks (201) pass through the interior of multiple mounting holes (202). Threaded walls (203) are provided on the bottom of multiple U-shaped locks (201). Fixing nuts (204) are threaded onto the exterior of multiple threaded walls (203). Two elastic washers (205) are attached to the bottom of multiple connectors (6). Multiple U-shaped locks (201) pass through the interior of multiple elastic washers (205).

3. The deep foundation pit pile anchor support structure according to claim 1, characterized in that: The mounting assembly includes a plurality of mounting bolts (9), which pass through the interior of a plurality of mounting slots (5), and the ends of the plurality of mounting bolts (9) are threaded with mounting nuts (10).

4. The deep foundation pit pile anchor support structure according to claim 2, characterized in that: The fixing mechanism (2) also includes a plurality of anti-slip pads (206), which are respectively attached to the top of a plurality of fixing nuts (204).

5. The deep foundation pit pile anchor support structure according to claim 1, characterized in that: Each of the retaining walls (1) is fixedly connected with a fall arrest net (11), and each of the fall arrest nets (11) adopts an X-shaped mesh design.

6. The deep foundation pit pile anchor support structure according to claim 1, characterized in that: Each of the multiple connectors (6) has a hook (12) fixedly connected to an adjacent side, and the exterior of each of the multiple hooks (12) is designed to be wear-resistant.

7. The deep foundation pit pile anchor support structure according to claim 1, characterized in that: Each of the multiple threaded anchor rods (4) has a hexagonal head (13) fixedly connected to one adjacent end, and the exterior of each of the multiple hexagonal heads (13) is designed with chamfers.

8. The deep foundation pit pile anchor support structure according to claim 1, characterized in that: The ends of the multiple threaded anchor rods (4) that are far apart are all tapered, and the dimensions of the multiple threaded anchor rods (4) are all matched.

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