Deep foundation pit supporting structure for cast-in-situ bored piles

Abstract

The utility model provides a cast-in-situ bored pile deep foundation pit supporting structure which comprises a cast-in-situ pile deep foundation pit body, cast-in-situ piles are connected to the inner walls of the four faces of the cast-in-situ pile deep foundation pit body in an inserted mode, inserting cylinders are installed at the four corners of the cast-in-situ pile deep foundation pit body, and the cast-in-situ pile deep foundation pit body is installed with a first connecting plate and a second connecting plate through screw cylinders, screws, inserting rods and sleeves through studs. Compared with the prior art, the protection assemblies can be installed at different positions and in different numbers according to the depth of the deep foundation pit through inserting grooves and locking grooves in inserting cylinders, and the protection assemblies can be installed at different positions and different numbers according to the width and length of the deep foundation pit through inserting installation of first connecting plates and second connecting plates. And different numbers of second connecting plates are added to correspond to the length and width of the deep foundation pit, the application range is wider, and meanwhile the connecting strength of every two adjacent protection assemblies is improved through the reinforcing assemblies.

Description

Technical Field

[0001] The utility model relates to the technical field of bored cast-in-place pile deep foundation pits, in particular to a bored cast-in-place pile deep foundation pit support structure. Background Art

[0002] Bored piles refer to piles that are made by forming pile holes in the foundation soil through mechanical drilling, steel pipe squeezing or manual excavation at the construction site, placing steel cages in the holes, and pouring concrete. In foundation pit projects, a pile wall structure formed by multiple bored piles is generally set around the deep foundation pit, and the risk of deep foundation pit collapse is reduced by using the pile wall structure. However, as the depth of the deep foundation pit increases, the corresponding bored piles also increase accordingly. At this time, the extrusion pressure on the bored piles from the soil layer around the deep foundation pit will also increase, which can easily lead to the risk of bored piles breaking due to uneven force.

[0003] Patent CN218970022U proposes a bored cast-in-place deep foundation pit support structure. Through the tubular structure of the casing itself, the casing can be firmly plugged into the bottom wall of the deep foundation pit, providing a solid foundation for the limit rod. The limit rod is used to press the bored cast-in-place piles in the deep foundation pit against the inner wall of the deep foundation pit, reducing the risk of the bored cast-in-place piles being damaged by the squeezing force of the soil layer around the deep foundation pit. Thus, the risk of the bored cast-in-place piles in the deep foundation pit being broken due to uneven force is reduced through the support of the limit rod; through the connecting ring, the limit rod is It is convenient to fix at any position around the casing, so that the support structure can adapt to deep foundation pits of different shapes, and the support structure can play a supporting role for bored piles in deep foundation pits of different shapes, further reducing the risk of bored piles in deep foundation pits breaking due to uneven force; through the connecting piece, not only the problem that the connection points between the two ends of the limit rod and the casing are not in the same plane is improved, but also the length of the limit rod is shortened, which is convenient for operators to carry the limit rod, and the number of casings used is reduced, thereby improving the installation efficiency of the support structure.

[0004] The shortcomings of the above scheme are: first, due to the uncertain depth of the deep foundation pit, the installation position and number of the protective structure also need to be specially formulated, and different deep foundation pits have different lengths and widths, so different protective structural parts are required for connection. However, the scheme lacks applicability when used in different deep foundation pits, and it is impossible to adjust the length of the protective parts and the installation position of the protective structure, so there is inconvenience. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a bored cast-in-place pile deep foundation pit support structure to solve the problems raised in the above-mentioned background technology. The utility model has a novel structure. The slots and locking slots on the insert tube can be used to install the protection components in different positions and different quantities according to the depth of the deep foundation pit. By plugging and installing the first connecting plate and the second connecting plate, different numbers of second connecting plates can be added according to the width and length of the deep foundation pit to correspond to the length and width of the deep foundation pit, and the scope of application is wider. At the same time, by strengthening the components, the connection strength of two adjacent groups of protection components is improved.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a bored cast-in-place pile deep foundation pit support structure, including a bored pile deep foundation pit body, the four inner walls of the bored pile deep foundation pit body are plugged with bored piles, and the four corners of the bored pile deep foundation pit body are installed with insert tubes, and multiple groups of protection components are provided on the surface of the bored piles on each side of the bored pile deep foundation pit body, and the protection components include a first connecting plate, the first connecting plate is provided with two groups of insert tubes locked and connected with the two ends of the same side, and multiple groups of second connecting plates are spliced ​​and installed between the two first connecting plates, and a reinforcement component is provided between adjacent protection components, and the reinforcement component includes an insert rod, the insert rod is installed on the second connecting plate of the lower group of protection components, and the top of the insert rod is slidably sleeved with a sleeve, and the sleeve is installed on the second connecting plate of the upper group of protection components.

[0007] Furthermore, the protective component also includes an insertion frame and an insertion plate, the second connecting plate is fixed with two groups of insertion frames or insertion plates, the insertion frames or insertion plates on both sides of the second connecting plate are staggered, and adjacent second connecting plates are installed by sliding and plugging the insertion plates and the insertion frames, a plug-in plate is fixed on the side of the first connecting plate facing the second connecting plate, and the first connecting plate and the second connecting plate are also installed by plugging the insertion plates and the insertion frames.

[0008] Furthermore, a rotating rod is rotatably mounted on one end of the first connecting plate facing the insert cylinder through a bearing, and an extrusion block is fixed to the other end of the rotating rod. Slots are provided on both vertical sides of the insert cylinder, and the extrusion block can slide through the slots and engage with the inner wall of the insert cylinder.

[0009] Furthermore, the insert tube is provided with locking grooves on both sides of the slot, the extrusion block is provided with first screw holes at both ends, and bolts are inserted into the outer ends of the locking grooves, and the bolts are engaged and inserted into the first screw holes.

[0010] Furthermore, the reinforcing component also includes a screw barrel, which is installed on the first connecting plate of the upper group of protective components. A screw is meshed and inserted inside the screw barrel, and the screw is installed on the second connecting plate of the lower group of protective components.

[0011] Furthermore, the outer ends of the screw barrel, screw rod, insert rod and sleeve are all installed with studs, and the screw barrel, screw rod and studs are rotatably connected through bearings, and the insert rod, sleeve and studs are fixed.

[0012] Furthermore, the first connecting plate and the second connecting plate are provided with second screw holes at the stud positions corresponding to the screw barrel, screw rod, insert rod and sleeve, and the studs are engaged and inserted in the second screw holes.

[0013] Beneficial effects of the utility model: The utility model is a bored cast-in-place pile deep foundation pit support structure, comprising a bored cast-in-place pile deep foundation pit body; an inserting tube; a slot; a locking slot; a protective component; a first connecting plate; a second connecting plate; an inserting plate; an inserting frame; a rotating rod; an extrusion block; a bolt; a first screw hole; a reinforcing component; a screw barrel; a screw rod; a sleeve; an inserting rod; a second screw hole; a stud;

[0014] 1. The utility model is installed with the first connecting plate and the second connecting plate through the screw barrel, the screw rod, the plug rod and the sleeve through the stud, which is convenient for disassembly. After the installation is completed, the vertical protection strength of the protection component is enhanced.

[0015] 2. The utility model locks the first connecting plate with the first screw hole by passing the bolt through the locking groove, thereby maintaining the lateral stability of the first connecting plate after installation.

[0016] 3. The utility model can adjust the installation position and the installation quantity of the protection components according to the depth of the deep foundation pit through the slots and the locking slots.

[0017] 4. Compared with the prior art, the utility model can install the protection components in different positions and different quantities according to the depth of the deep foundation pit through the slots and locking grooves on the plug-in tube. Through the plug-in installation of the first connecting plate and the second connecting plate, different numbers of second connecting plates can be added according to the width and length of the deep foundation pit, so as to correspond to the length and width of the deep foundation pit, and the scope of application is wider. At the same time, by strengthening the components, the connection strength of two adjacent groups of protection components is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a bored cast-in-place pile deep foundation pit support structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection between the protection component and the insert tube of a bored cast-in-place pile deep foundation pit support structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection between the protection component and the reinforcement component of a bored cast-in-place pile deep foundation pit support structure of the utility model;

[0021] Figure 4 The utility model is a schematic diagram of locking and installing an extrusion block and an insert tube of a bored cast-in-place pile deep foundation pit support structure.

[0022] In the figure: 1. cast-in-place pile deep foundation pit body; 2. insert tube; 21. slot; 22. locking slot; 3. protection component; 31. first connecting plate; 32. second connecting plate; 33. insert plate; 34. insert frame; 35. rotating rod; 36. extrusion block; 37. bolt; 38. first screw hole; 4. reinforcement component; 41. screw tube; 42. screw rod; 43. sleeve; 44. insert rod; 45. second screw hole; 46. stud. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] See also Figures 1 to 4 The utility model provides a technical solution: a bored cast-in-place pile deep foundation pit support structure, comprising a bored cast-in-place pile deep foundation pit body 1, the four inner walls of the bored cast-in-place pile deep foundation pit body 1 are plugged with bored piles, and the four corners of the bored cast-in-place pile deep foundation pit body 1 are equipped with inserts 2, and multiple groups of protective components 3 are arranged on the surface of the bored piles on each side of the bored cast-in-place pile deep foundation pit body 1, and the protective components 3 include a first connecting plate 31, the first connecting plate 31 is provided with two groups of inserts 2 locked and connected with the two ends of the same side, and multiple groups of second connecting plates 32 are spliced ​​and installed between the two first connecting plates 31, and the adjacent protective components 3 are connected. A reinforcing component 4 is provided in between, and the reinforcing component 4 includes an insert rod 44, which is installed on the second connecting plate 32 of the lower group of protective components 3, and a sleeve 43 is slidably sleeved on the top of the insert rod 44, and the sleeve 43 is installed on the second connecting plate 32 of the upper group of protective components 3. When using the device, four insert tubes 2 are inserted into the four corners of the deep foundation pit body 1 of the bored pile by a vibrating hammer, and then the length, installation position and number of the protective components 3 are adjusted according to the depth, length and width of the deep foundation pit, and fixed on the insert tube 2, and the two adjacent groups of protective components 3 are connected by the reinforcing component 4 to improve the vertical connection strength.

[0025] In this embodiment, the protection component 3 also includes an insertion frame 34 and an insertion plate 33. The second connecting plate 32 is fixed with two groups of insertion frames 34 or insertion plates 33. The insertion frames 34 or insertion plates 33 on both sides of the second connecting plate 32 are staggered. The adjacent second connecting plates 32 are slidably plugged and installed through the insertion plates 33 and the insertion frames 34. The first connecting plate 31 is fixed with the insertion plate 33 on the side facing the second connecting plate 32, and the first connecting plate 31 and the second connecting plate 32 are also plugged and installed through the insertion plate 33 and the insertion frame 34. The first connecting plate 31 is rotatably installed with a rotating rod 35 at one end facing the insert tube 2 through a bearing, and an extrusion block 36 is fixed to the other end of the rotating rod 35. Slots 21 are opened on the vertical sides of the insert tube 2. The extrusion block 36 can slide through the slot 21 and be clamped with the inner wall of the insert tube 2. The insert tube 2 is located in the slot 2 1 is provided with locking grooves 22 on both sides, and first screw holes 38 are provided at both ends of the extrusion block 36, and bolts 37 are inserted at the outer ends of the locking grooves 22, and the bolts 37 are meshed and inserted in the first screw holes 38. According to the length of the cast-in-place piles that need to be protected on one side of the deep foundation pit, a corresponding number of second connecting plates 32 are selected, and they are connected to the first connecting plate 31 upward through the plug-in plate 33 and the plug-in frame 34 to form a complete horizontal plate, and then the extrusion block 36 is inserted into the slot 21 from a vertical state, and the rotating rod 35 is rotated to make the extrusion block 36 become horizontally clamped with the insert cylinder 2, and the bolts 37 pass through the locking grooves 22 and are locked with the first screw holes 38 to maintain the lateral stability of the first connecting plate 31 after installation. Through the slot 21 and the locking groove 22, the installation position and installation quantity of the protection component 3 can be adjusted according to the depth of the deep foundation pit.

[0026] In this embodiment, the reinforcing component 4 also includes a screw barrel 41, which is installed on the first connecting plate 31 of the upper protective component 3, and a screw rod 42 is meshed and inserted inside the screw barrel 41, and the screw rod 42 is installed on the second connecting plate 32 of the lower protective component 3. The outer ends of the screw barrel 41, the screw rod 42, the plug rod 44, and the sleeve 43 are all installed with studs 46, and the screw barrel 41 and the screw 42 are rotatably connected with the studs 46 through bearings, and the plug rod 44 and the sleeve 43 are fixed with the studs 46. The first connecting plate 31 and the second connecting plate 32 are both provided with second screw holes 45 corresponding to the positions of the studs 46 of the screw barrel 41, the screw 42, the plug rod 44, and the sleeve 43, and the studs 46 are meshed and inserted inside the second screw holes 45. First, the lower group is installed After the protection component 3 is installed, the stud 46 of the screw 42 and the plug 44 is installed on the first connecting plate 31 and the second connecting plate 32, and then the screw barrel 41 and the sleeve 43 are installed on the first connecting plate 31 and the second connecting plate 32 of the upper group of the protection component 3, and are inserted into the corresponding positions of the screw 42 and the plug 44. The engagement of the screw 42 and the screw barrel 41 can adjust the distance between the two groups of protection components 3, and at the same time, it plays a supporting and limiting role for the unlocked protection component 3 of the upper group, so as to facilitate the subsequent locking and installation of the first connecting plate 31 on the sleeve 43. The screw barrel 41, the screw 42, the plug 44, and the sleeve 43 are installed with the first connecting plate 31 and the second connecting plate 32 through the stud 46, which is convenient for disassembly. After the installation is completed, the vertical protection strength of the protection component 3 is strengthened.

[0027] When using the device, four insert tubes 2 are inserted into the four corners of the deep foundation pit body 1 of the bored pile by means of a vibrating hammer. According to the length of the bored piles to be protected on one side of the deep foundation pit, a corresponding number of second connecting plates 32 are selected, and the second connecting plates 32 are connected upwardly to the first connecting plates 31 through the insert plates 33 and the insert frames 34 to form a complete horizontal plate. Subsequently, the extrusion block 36 is inserted into the slot 21 from a vertical state, and the rotating rod 35 is rotated to change the extrusion block 36 into a horizontal state to be clamped with the insert tube 2. The bolt 37 is passed through the locking groove 22 and locked with the first screw hole 38 to maintain the horizontal stability of the first connecting plate 31 after installation. Through the slot 21 and the locking groove 22, the installation position and number of the protection components 3 can be adjusted according to the depth of the deep foundation pit. First, the protection components 3 of the lower group are installed. After the installation is completed, the stud 46 of the screw 42 and the plug 44 is installed on the first connecting plate 31 and the second connecting plate 32, and then the screw barrel 41 and the sleeve 43 are installed on the first connecting plate 31 and the second connecting plate 32 of the upper group of protective components 3, and are inserted into the corresponding positions of the screw 42 and the plug 44. The engagement of the screw 42 with the screw barrel 41 can adjust the distance between the two groups of protective components 3, and at the same time, it plays a supporting and limiting role for the unlocked protective components 3 of the upper group, so as to facilitate the subsequent locking and installation of the first connecting plate 31 on the plug 2. The screw barrel 41, screw 42, plug 44, and sleeve 43 are installed with the first connecting plate 31 and the second connecting plate 32 through the stud 46, which is convenient for disassembly. After the installation is completed, the vertical protective strength of the protective component 3 is strengthened.

[0028] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bored cast-in-place pile deep foundation pit support structure, comprising a bored cast-in-place pile deep foundation pit body (1), characterized in that: The four inner walls of the cast-in-place pile deep foundation pit body (1) are plugged with cast-in-place piles. Insertion tubes (2) are installed at the four corners of the cast-in-place pile deep foundation pit body (1). Multiple groups of protection components (3) are provided on the surface of the cast-in-place piles on each side of the cast-in-place pile deep foundation pit body (1). The protection components (3) include a first connecting plate (31). The first connecting plate (31) is provided with two groups of insertion tubes (2) locked and connected with the two ends of the same side. Multiple groups of second connecting plates (32) are spliced ​​and installed between the two first connecting plates (31). A reinforcement component (4) is provided between adjacent protection components (3). The reinforcement component (4) includes an insertion rod (44). The insertion rod (44) is installed on the second connecting plate (32) of the lower group of protection components (3). The top of the insertion rod (44) is slidably sleeved with a sleeve (43). The sleeve (43) is installed on the second connecting plate (32) of the upper group of protection components (3).

2. A bored cast-in-place pile deep foundation pit support structure according to claim 1, characterized in that: The protection component (3) further comprises an insertion frame (34) and an insertion board (33); the second connecting plate (32) is fixed with two groups of insertion frames (34) or insertion boards (33); the insertion frames (34) or insertion boards (33) on both sides of the second connecting plate (32) are staggered; adjacent second connecting plates (32) are installed by slidingly plugging in the insertion boards (33) and the insertion frames (34); the first connecting plate (31) is fixed with the insertion board (33) on one side facing the second connecting plate (32); and the first connecting plate (31) and the second connecting plate (32) are also installed by plugging in the insertion boards (33) and the insertion frames (34).

3. A bored cast-in-place pile deep foundation pit support structure according to claim 2, characterized in that: A rotating rod (35) is rotatably mounted on one end of the first connecting plate (31) facing the insert cylinder (2) through a bearing, and an extrusion block (36) is fixed to the other end of the rotating rod (35). Slots (21) are provided on two vertical sides of the insert cylinder (2), and the extrusion block (36) can slide through the slots (21) and be clamped with the inner wall of the insert cylinder (2).

4. A bored cast-in-place pile deep foundation pit support structure according to claim 3, characterized in that: The insert tube (2) is provided with locking grooves (22) on both sides of the insertion slot (21), the extrusion block (36) is provided with first screw holes (38) at both ends, and bolts (37) are inserted into the outer ends of the locking grooves (22), and the bolts (37) are engaged and inserted into the inside of the first screw holes (38).

5. The bored cast-in-place pile deep foundation pit support structure according to claim 1, characterized in that: The reinforcing component (4) further comprises a screw barrel (41), wherein the screw barrel (41) is mounted on the first connecting plate (31) of the upper protective component (3), and a screw rod (42) is meshedly inserted inside the screw barrel (41), and the screw rod (42) is mounted on the second connecting plate (32) of the lower protective component (3).

6. A bored cast-in-place pile deep foundation pit support structure according to claim 5, characterized in that: The outer ends of the screw barrel (41), the screw rod (42), the insert rod (44) and the sleeve (43) are all installed with studs (46), and the screw barrel (41) and the screw rod (42) are rotatably connected with the studs (46) through bearings, and the insert rod (44) and the sleeve (43) are fixed with the studs (46).

7. A bored cast-in-place pile deep foundation pit support structure according to claim 6, characterized in that: The first connecting plate (31) and the second connecting plate (32) are both provided with second screw holes (45) at the positions of the screw barrel (41), the screw rod (42), the insert rod (44) and the screw stud (46) of the sleeve (43), and the screw stud (46) is engaged and inserted into the second screw hole (45).

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