A deep foundation pit support and retaining device for bored piles

Abstract

This utility model relates to the field of construction equipment technology and discloses a deep foundation pit support enclosure device for bored piles. It includes a main enclosure body composed of multiple U-shaped support plates, tie-up components distributed circumferentially along the inner side of the enclosure, and reinforcing support components hinged between the enclosure and the bottom fixing mechanism. The U-shaped support plates adopt a steel-concrete composite structure, filled with lightweight concrete. The tie-up components have adjustable tension via adjustable buckles. The bottom fixing mechanism adopts a design combining tapered anchor piles and a pre-embedded base plate. This device forms a spatial force-bearing system through ring-shaped tie-up and elastic support, effectively resisting lateral soil pressure and deformation of the foundation pit. It has advantages such as convenient installation, strong adaptability, and reusability, and is suitable for various deep foundation pit support projects.

Description

Technical Field

[0001] This utility model relates to the field of building construction equipment technology, specifically a deep foundation pit support and enclosure device for bored cast-in-place piles. Background Technology

[0002] During the construction of bored piles, the stability of deep foundation pits is of paramount importance. As a key device to ensure the safety of the foundation pit slope, the support and retaining device must withstand multiple effects such as soil lateral pressure, groundwater pressure and construction loads.

[0003] Currently, existing deep foundation pit support and retaining structures suffer from the following problems: traditional retaining structures are mostly rigid splicing structures, which are difficult to adapt to uneven settlement of the foundation pit soil and are prone to local deformation or cracking; the support components have poor adjustment flexibility and cannot dynamically adjust the support strength according to the foundation pit depth and soil pressure; the bottom fixation is not firm, and slippage is prone to occur in soft soil foundations, posing safety hazards. Therefore, it is necessary to develop an improved drilled pile deep foundation pit support and retaining device to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a support and enclosure device for deep foundation pits of bored piles, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a deep foundation pit support enclosure device for bored cast-in-place piles, comprising an enclosure body, a tie assembly, a reinforcing support member, and a bottom fixing mechanism. The enclosure body is composed of multiple U-shaped support plates spliced ​​together, with adjacent U-shaped support plates connected by splicing locks. The tie assembly is distributed circumferentially along the inner side of the enclosure body. One end of the reinforcing support member is hinged to the inner wall of the enclosure body, and the other end is connected to the bottom fixing mechanism. The bottom fixing mechanism is buried in the soil at the bottom of the foundation pit.

[0006] Furthermore, the U-shaped support plate includes an outer steel plate, an inner steel mesh, and a filling layer. The filling layer is located between the outer steel plate and the inner steel mesh and is made of lightweight concrete. The outer steel plate provides resistance to deformation, the inner steel mesh enhances structural toughness, and the lightweight concrete filling layer reduces weight while increasing overall rigidity.

[0007] Furthermore, the tie assembly includes a ring-shaped tie rope, an adjusting buckle, and connecting ear plates. The connecting ear plates are uniformly welded to the inner wall of the U-shaped support plate. The ring-shaped tie rope passes through the through hole of the connecting ear plate. The adjusting buckle is located at the end of the ring-shaped tie rope and is used to adjust the tie tension. The ring-shaped tie rope can form multiple U-shaped support plates into an integral load-bearing structure, and the adjusting buckle can adjust the tie force in real time according to the soil pressure to prevent excessive local stress.

[0008] Furthermore, the reinforcing support includes a telescopic support rod and a steering hinge seat. The steering hinge seat is fixed to the inner wall of the enclosure body and the bottom fixing mechanism, respectively. The two ends of the telescopic support rod are hinged to each other through the steering hinge seat (32). The telescopic support rod can adapt to the support requirements of different foundation pit depths, and the steering hinge seat allows rotation at a certain angle.

[0009] Furthermore, the telescopic support rod includes an outer tube, an inner rod, and a positioning pin. The inner rod is slidably inserted inside the outer tube. The outer tube has multiple adjustment holes on its side wall. The positioning pin passes through a through hole at the end of the inner rod and engages with the adjustment hole. The length is adjusted by sliding the inner rod within the outer tube. The positioning pin, in conjunction with different adjustment holes, can fix the required support length, making operation convenient.

[0010] Furthermore, the bottom fixing mechanism includes a pre-embedded base, anchor piles, and reinforcing ribs. The anchor piles are vertically fixed to the bottom of the pre-embedded base and have a conical structure. The reinforcing ribs are evenly distributed at the connection between the pre-embedded base and the anchor piles. The conical anchor piles facilitate insertion into the soil at the bottom of the foundation pit, enhancing pull-out resistance. The reinforcing ribs improve the connection strength between the pre-embedded base and the anchor piles, preventing root breakage.

[0011] Furthermore, the top of the enclosure body is equipped with an overflow baffle, which is inclined outwards from the pit, and diagonal bracing is provided between the overflow baffle and the enclosure body. The overflow baffle can prevent gravel or rainwater from falling into the pit from the top of the pit, and the diagonal bracing enhances the structural stability of the baffle.

[0012] Compared with the prior art, this utility model provides a deep foundation pit support and retaining device for bored piles, which has the following beneficial effects:

[0013] This deep foundation pit support and enclosure device for bored piles, through the setting of tie components and U-shaped support plate splicing structure, makes the enclosure form an integral force-bearing system, which can adapt to uneven soil settlement and solve the problem of easy deformation and cracking of traditional rigid enclosures.

[0014] This deep foundation pit support and enclosure device for bored piles, through its telescopic reinforcing support components and conical anchor pile bottom structure, can flexibly adjust the support strength and enhance the bottom anti-slip capability. It has the effect of dynamically adapting to the depth of the foundation pit and soil pressure, and solves the problems of poor support adjustability and unstable fixation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the enclosure of this utility model;

[0018] Figure 3 This is a schematic diagram of the tie assembly structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the bottom fixing mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the reinforcing support structure of this utility model.

[0021] In the diagram: 1. Main body of the enclosure; 11. U-shaped support plate; 111. Outer steel plate; 112. Inner steel mesh; 113. Filling layer; 12. Splicing lock; 2. Tie assembly; 21. Ring tie rope; 22. Adjusting buckle; 23. Connecting ear plate; 3. Reinforcing support; 31. Telescopic support rod; 311. Outer pipe; 312. Inner rod; 313. Positioning pin; 314. Adjusting hole; 32. Steering hinge seat; 4. Bottom fixing mechanism; 41. Embedded chassis; 42. Anchor pile; 43. Reinforcing rib plate; 5. Overflow baffle; 6. Diagonal bracing. Detailed Implementation

[0022] 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.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0024] Please see Figure 1-5This utility model provides a technical solution: a deep foundation pit support enclosure device for bored piles, including a enclosure body 1, a tie assembly 2, a reinforcing support 3, and a bottom fixing mechanism 4. The enclosure body 1 is composed of multiple U-shaped support plates 11 spliced ​​together. Adjacent U-shaped support plates 11 are connected by splicing locks 12. The tie assembly 2 is distributed circumferentially along the inner side of the enclosure body 1. One end of the reinforcing support 3 is hinged to the inner wall of the enclosure body 1, and the other end is connected to the bottom fixing mechanism 4. The bottom fixing mechanism 4 is buried in the soil at the bottom of the foundation pit.

[0025] The U-shaped support plate 11 includes an outer steel plate 111, an inner steel mesh 112, and a filling layer 113. The filling layer 113 is located between the outer steel plate 111 and the inner steel mesh 112, and the filling layer 113 is made of lightweight concrete.

[0026] The tie assembly 2 includes an annular tie rope 21, an adjusting buckle 22, and a connecting ear plate 23. The connecting ear plate 23 is uniformly welded to the inner wall of the U-shaped support plate 11. The annular tie rope 21 passes through the through hole of the connecting ear plate 23. The adjusting buckle 22 is located at the end of the annular tie rope 21 and is used to adjust the tie tension.

[0027] The reinforcing support 3 includes a telescopic support rod 31 and a steering hinge seat 32. The steering hinge seat 32 is fixed on the inner wall of the enclosure body 1 and the bottom fixing mechanism 4 respectively. The two ends of the telescopic support rod 31 are hinged to each other through the steering hinge seat (32).

[0028] The telescopic support rod 31 includes an outer tube 311, an inner rod 312, and a positioning pin 313. The inner rod 312 is slidably inserted into the outer tube 311. The outer tube 311 has multiple adjustment holes 314 on its side wall. The positioning pin 313 passes through the through hole at the end of the inner rod 312 and engages with the adjustment hole 314.

[0029] The bottom fixing mechanism 4 includes a pre-embedded base plate 41, anchor piles 42 and reinforcing ribs 43. The anchor piles 42 are vertically fixed to the bottom of the pre-embedded base plate 41 and have a conical structure. The reinforcing ribs 43 are evenly distributed at the connection between the pre-embedded base plate 41 and the anchor piles 42.

[0030] The top of the main body of the enclosure 1 is provided with an overflow baffle 5, which is inclined to the outside of the pit, and a diagonal bracing 6 is provided between the overflow baffle 5 and the main body of the enclosure 1.

[0031] Working principle: During construction, the anchor piles 42 of the bottom fixing mechanism 4 are first driven into the preset position at the bottom of the foundation pit, so that the pre-embedded base plate 41 is in contact with the bottom surface of the foundation pit; then the U-shaped support plate 11 is connected in sequence through the splicing lock 12 to form the main body of the enclosure 1, and it is erected above the pre-embedded base plate 41; the length of the telescopic support rod 31 is adjusted and fixed by the positioning pin 313, so that the two ends of the reinforcing support 3 are respectively hinged and fixed to the main body of the enclosure 1 and the pre-embedded base plate 41; finally, the ring tie rope 21 is passed through the connecting ear plate 23 and tightened by the adjusting buckle 22, so that the main body of the enclosure 1 forms an integral load-bearing structure. The overflow baffle 5 prevents the top debris from falling into the foundation pit, which is convenient and practical and deserves to be vigorously promoted.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A bored pile deep foundation pit support enclosure device, characterized in that, The enclosure includes a main body (1), a tie assembly (2), a reinforcing support (3), and a bottom fixing mechanism (4). The main body (1) is composed of multiple U-shaped support plates (11) spliced ​​together. Adjacent U-shaped support plates (11) are connected by splicing buckles (12). The tie assembly (2) is distributed circumferentially along the inner side of the main body (1). One end of the reinforcing support (3) is hinged to the inner wall of the main body (1), and the other end is connected to the bottom fixing mechanism (4). The bottom fixing mechanism (4) is buried in the soil at the bottom of the foundation pit.

2. The bored pile deep foundation pit supporting fence device according to claim 1, characterized in that, The U-shaped support plate (11) includes an outer steel plate (111), an inner steel mesh (112), and a filling layer (113). The filling layer (113) is located between the outer steel plate (111) and the inner steel mesh (112), and the filling layer (113) is made of lightweight concrete.

3. The bored pile deep foundation pit supporting fence device according to claim 1, characterized in that, The tie assembly (2) includes an annular tie rope (21), an adjusting buckle (22) and a connecting ear plate (23). The connecting ear plate (23) is uniformly welded to the inner wall of the U-shaped support plate (11). The annular tie rope (21) passes through the through hole of the connecting ear plate (23). The adjusting buckle (22) is located at the end of the annular tie rope (21) and is used to adjust the tie tension.

4. The deep foundation pit support and retaining device for bored cast-in-place piles according to claim 1, characterized in that, The reinforcing support (3) includes a telescopic support rod (31) and a steering hinge (32). The steering hinge (32) is fixed on the inner wall of the enclosure body (1) and the bottom fixing mechanism (4) respectively. The two ends of the telescopic support rod (31) are hinged to each other through the steering hinge (32).

5. A deep foundation pit support and retaining device for bored cast-in-place piles according to claim 4, characterized in that, The telescopic support rod (31) includes an outer tube (311), an inner rod (312), and a positioning pin (313). The inner rod (312) is slidably inserted into the outer tube (311). The outer tube (311) has multiple adjustment holes (314) on its side wall. The positioning pin (313) passes through the through hole at the end of the inner rod (312) and engages with the adjustment hole (314).

6. The deep foundation pit support and retaining device for bored cast-in-place piles according to claim 1, characterized in that, The bottom fixing mechanism (4) includes a pre-embedded chassis (41), anchor piles (42) and reinforcing ribs (43). The anchor piles (42) are vertically fixed to the bottom of the pre-embedded chassis (41) and have a conical structure. The reinforcing ribs (43) are evenly distributed at the connection between the pre-embedded chassis (41) and the anchor piles (42).

7. A deep foundation pit support and retaining device for bored cast-in-place piles according to claim 1, characterized in that, The top of the enclosure body (1) is provided with an overflow baffle (5), which is inclined to the outside of the pit, and a diagonal bracing (6) is provided between the overflow baffle (5) and the enclosure body (1).

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