Novel pile casing for cast-in-place pile foundation pit

Abstract

The utility model provides a novel pile casing for a cast-in-place pile foundation pit, which belongs to the technical field of cast-in-place pile casings and comprises a pile casing body, two horizontal hole groups are arranged on the inner side wall of the pile casing body in the vertical direction, each horizontal hole group comprises a plurality of mounting holes arranged at equal intervals in the circumferential direction, and transverse insertion rods are movably arranged on the mounting holes. A plurality of assembling parts are arranged on the side, close to the top wall, of the outer side wall of the pile casing body, the number of the assembling parts is the same as that of the mounting holes in the horizontal hole set, the assembling parts are located over the mounting holes, horizontal supporting rods are arranged on the assembling parts, and the bottoms of the horizontal supporting rods abut against the ground; the problems that in the plum rain season, due to the fact that soft soil cannot provide original supporting force for an existing pile casing, the pile casing is prone to being loosened due to external force in the construction operation process, a pile opening cannot be effectively protected, the risk of collapse of the cast-in-place pile opening is increased, the construction progress is affected, and the construction cost is lowered are solved. And meanwhile, the safety of constructors is threatened.

Description

Technical Field

[0001] The utility model relates to the technical field of cast-in-place pile casing, and particularly relates to a novel casing for cast-in-place pile foundation pits. Background Technique

[0002] In the field of foundation engineering, as a common deep foundation form, cast-in-place piles are widely used in the foundation treatment of various buildings and structures. By drilling holes in the foundation and then pouring concrete slurry to form pile bodies, the bearing capacity and stability of the foundation are enhanced. During the construction process of cast-in-place piles, in order to ensure the safe progress of drilling operations and the complete formation of pile bodies, a casing is usually set at the pile opening. Its main function is to isolate the hole wall from the external environment, prevent the hole wall from collapsing, and ensure that the slurry does not leak during the pouring of concrete. The casing is initially fixed by the extrusion of the surrounding soil, providing a stable working environment for subsequent drilling and pouring operations.

[0003] However, under specific climatic conditions, such as the plum rain season, long-term rain infiltration not only reduces the cohesion of the soil but also increases the water content of the soil, causing the soil around the casing to lose its original supporting force. At this time, the casing is extremely prone to loosening under external forces during construction operations, and thus cannot effectively protect the pile opening, increasing the risk of collapse of the cast-in-place pile opening, which not only affects the construction progress but also poses a threat to the safety of construction workers. Content of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides a novel casing for cast-in-place pile foundation pits to solve the above problems.

[0005] The utility model is implemented as follows:

[0006] A novel casing for cast-in-place pile foundation pits includes a casing body. Two groups of horizontal hole groups are vertically arranged on the inner side wall of the casing body. Each horizontal hole group includes a number of mounting holes equally divided circumferentially. Transverse insertion rods are movably arranged on the mounting holes. A number of assembling parts are arranged on the outer side wall of the casing body near the top wall. The number of the assembling parts is the same as the number of the mounting holes on the horizontal hole group, and the assembling parts are located directly above the mounting holes. Horizontal support rods are arranged on the assembling parts. One end of each horizontal support rod is fixedly provided with a connecting plate. The connecting plate is arranged on the assembling part, and the bottom of the horizontal support rod abuts against the ground.

[0007] In an embodiment of the utility model, an inner concave part is formed on one side of the inner side wall of the casing body where the mounting hole is located, and a convex part is formed on one side of the outer side wall of the casing body.

[0008] In an embodiment of the present utility model, one end of the horizontal insertion rod is a sharp end, and a limiting block is provided at the other end. After the horizontal insertion rod is inserted from the inner side of the mounting hole, the limiting block is fitted with the concave portion.

[0009] In an embodiment of the present utility model, the overall length of the horizontal insertion rod is less than two-thirds of the inner diameter of the casing body.

[0010] In an embodiment of the present utility model, the connecting plate is welded to the assembling portion.

[0011] In an embodiment of the present utility model, the assembling portion includes a sliding groove opened at the top of the casing body. A flange is provided at the edge of the sliding groove. Side grooves are opened on both sides of the connecting plate close to one side of the horizontal support rod. Through holes of the same are opened on the side wall of the sliding groove and on one side of the connecting plate. The connecting plate is slidably arranged in the sliding groove. The flange abuts against the side groove, and the through holes are fixed by bolts.

[0012] In an embodiment of the present utility model, a plurality of first positioning insertion holes are opened at the top of the horizontal support rod, and the same number of second positioning insertion holes as the first positioning insertion holes are opened at the top of the horizontal insertion rod.

[0013] In an embodiment of the present utility model, when the limiting block on the horizontal insertion rod is completely fitted in the concave portion, the first positioning insertion hole is coaxial with the second positioning insertion hole, and a vertical insertion rod is inserted at each group of coaxial first positioning insertion holes and second positioning insertion holes.

[0014] In an embodiment of the present utility model, the vertical insertion rod includes an insertion rod body. A limiting portion is provided at the top of the insertion rod body, and a pull ring is provided at the top of the limiting portion.

[0015] The beneficial effects of the present utility model are as follows: By combining the use of the horizontal insertion rod and the vertical insertion rod, a double fixation mechanism is formed, which not only enhances the stability of the casing body in the soil layer, but also effectively prevents the casing body from loosening or shifting due to external forces during the construction operation; The casing adopts a detachable connection design, such as the horizontally support rod, the horizontal insertion rod and the vertical insertion rod which are detachably arranged, so that each component of the casing can be easily disassembled and reassembled, simplifying the preparation work before transportation and improving the transportation efficiency. At the same time, after disassembly, each component of the casing can be compactly stacked or packed, thus significantly reducing the occupied space, which is particularly important for engineering projects that require long-distance transportation or operation in a limited space, and can save transportation costs and storage space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present utility model;

[0018] Figure 2 Schematic diagram of the structure of the casing body provided by the embodiment of the present utility model;

[0019] Figure 3 is Figure 2 partial structure schematic diagram at A in

[0020] Figure 4 Schematic diagram of the structure of the horizontal support rod provided by the embodiment of the present utility model;

[0021] Figure 5 Schematic diagram of the structure of the transverse insertion rod provided by the embodiment of the present utility model;

[0022] Figure 6 Schematic diagram of the structure of the vertical insertion rod provided by the embodiment of the present utility model;

[0023] Figure 7 Schematic diagram of the structure of the embodiment provided by the embodiment of the present utility model.

[0024] In the figure: 10, casing body; 11, horizontal hole group; 1101, installation hole; 1102, concave part; 1103, convex part; 12, horizontal support rod; 1201, connecting plate; 1202, first positioning jack; 1203, reinforcing rib; 1204, side groove; 13, assembly part; 1301, sliding groove; 1302, flange; 20, transverse insertion rod; 21, limiting block; 22, second positioning jack; 30, vertical insertion rod; 31, pull ring; 32, limiting part; 33, insertion rod body. Specific embodiments

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0026] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0027] As Figures 1-5 shown, the present utility model provides a new type of casing for bored pile foundation pits, including a casing body 10. Two groups of horizontal hole groups 11 are arranged vertically on the inner side wall of the casing body 10. The horizontal hole group 11 includes a number of mounting holes 1101 equally divided circumferentially. A transverse insertion rod 20 is movably arranged on the mounting hole 1101. A number of assembly parts 13 are arranged on the outer side wall of the casing body 10 near the top wall. The number of assembly parts 13 is the same as the number of mounting holes 1101 on the horizontal hole group 11, and the assembly parts 13 are located directly above the mounting holes 1101. A horizontal support rod 12 is arranged on the assembly parts 13. One end of the horizontal support rod 12 is fixedly provided with a connecting plate 1201. The connecting plate 1201 is arranged on the assembly parts 13. The bottom of the horizontal support rod 12 abuts against the ground. A reinforcing rib 1203 for strengthening its structural strength is arranged between the horizontal support rod 12 and the connecting plate 1201 to prevent the casing body 10 from being radially bent when placed on the pile opening.

[0028] In a preferred embodiment, an extension plate is arranged at the bottom of the horizontal support rod 12 to increase the contact area between the horizontal support rod 12 and the ground, so that it can be more stably fixed on the ground during installation.

[0029] As Figure 2 and Figure 5 shown, an inner concave part 1102 is arranged on one side of the inner side wall of the casing body 10 where the mounting hole 1101 is located, and a convex part 1103 is arranged on one side of the outer side wall of the casing body 10. The convex part 1103 is used to guide the transverse insertion rod 20 to ensure that it is inserted into the soil in the convex direction, so as to achieve a balanced fixing effect. One end of the transverse insertion rod 20 is a sharp end for facilitating penetration of the soil layer, and a limiting block 21 is arranged at the other end. After the transverse insertion rod 20 is inserted from the inside of the mounting hole 1101, the limiting block 21 can be engaged with the inner concave part 1102.

[0030] It should be noted that the overall length of the transverse insertion rod 20 is less than two-thirds of the inner diameter of the casing body 10, so as to ensure that there is sufficient space for operation when the transverse insertion rod 20 is inserted inside the casing body 10.

[0031] In a preferred embodiment, a notch is formed on one side of the limiting block 21. A clamping plate is hinged at the notch, and a clamping hand portion is arranged at the bottom of the clamping plate. Without external force, the clamping plate and the limiting block 21 are coplanar. During recovery, the clamping plate is rotated to a proper angle through the clamping hand portion, and the whole is pulled out through the clamping plate, and finally recovered.

[0032] Specifically, the casing body 10 is placed at the pile opening of the cast-in-place pile. At this time, the horizontal support rod 12 abuts against the ground. A plurality of transverse insertion rods 20 are respectively inserted into the mounting holes 1101 from the inside of the casing body 10, so that they are inserted into the soil on the outer side wall of the casing body 10, thereby improving the stability of the casing body 10 in the soil layer and avoiding the occurrence of collapse phenomena.

[0033] In one embodiment, the connecting plate 1201 is welded to the assembling portion 13. This fixing method is simple and convenient, without too many technological processes and with low cost.

[0034] In another embodiment, as Figures 3-4 shown, the connecting plate 1201 is detachably arranged on the assembling portion 13. The assembling portion 13 includes a sliding groove 1301 formed at the top of the casing body 10. A flange 1302 is arranged at the edge of the sliding groove 1301. Side grooves 1204 are formed on both sides of the connecting plate 1201 close to one side of the horizontal support rod 12. Through holes of the same are formed on the side wall of the sliding groove 1301 and one side of the connecting plate 1201. The connecting plate 1201 is slidably arranged in the sliding groove 1301, the flange 1302 abuts against the side grooves 1204, and the through holes are fixed by bolts. This connection method is convenient for transportation. When recovering, the horizontal support rod 12 can be removed to reduce the situation of occupying space by itself.

[0035] As Figures 4-6 shown, a plurality of first positioning insertion holes 1202 are formed at the top of the horizontal support rod 12. The same number of second positioning insertion holes 22 as the first positioning insertion holes 1202 are formed at the top of the transverse insertion rod 20. When the limiting block 21 on the transverse insertion rod 20 is completely embedded in the concave portion 1102, the first positioning insertion holes 1202 and the second positioning insertion holes 22 are coaxial. A vertical insertion rod 30 is inserted at each group of coaxial first positioning insertion holes 1202 and second positioning insertion holes 22 to further improve the stability of the transverse insertion rod 20 in the soil layer. Among them, the vertical insertion rod 30 includes an insertion rod body 33, a limiting portion 32 is arranged at the top of the insertion rod body 33, and a pull ring 31 is arranged at the top of the limiting portion 32.

[0036] Embodiment, as Figure 7As shown in the figure, the casing body 10 is hoisted at the pile opening. At this time, the bottom of the horizontal support rod 12 abuts against the ground. Then, the transverse insertion rods 20 are sequentially inserted into the installation holes 1101 from the inside of the casing body 10, so that the limit blocks 21 are completely embedded into the concave parts 1102. Further, a plurality of vertical insertion rods 30 are sequentially inserted vertically into the ground from the first positioning insertion holes 1202, so that the limiting parts 32 abut against the horizontal support rod 12. At this time, the insertion rod body 33 sequentially penetrates through two coaxial second positioning insertion holes 22. The vertical insertion rods 30 not only fix the casing body 10, but also further fix the transverse insertion rods 20, reducing the influence of soil property changes on the stability of the casing body 10 at the pile opening.

[0037] Through the above structure, the problem that in the plum rain season, due to the softening of the soil and the increase in water content, the soil around the casing loses its original supporting force, and then the casing is extremely vulnerable to external forces and loosens during the construction operation, unable to effectively protect the pile opening, resulting in an increased risk of collapse of the cast-in-place pile opening, which not only affects the construction progress but also poses a threat to the safety of construction workers is solved.

[0038] The above further describes the present invention with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as a limitation on the essence and scope of the present invention. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present invention.

Claims

1. A new type of casing for cast-in-place pile foundation pit, characterized in that, It includes a casing body (10). On the inner sidewall of the casing body (10) in the vertical direction, two groups of horizontal hole groups (11) are provided. The horizontal hole group (11) includes a number of mounting holes (1101) equally divided circumferentially. A transverse insertion rod (20) is movably arranged in the mounting hole (1101). On the outer sidewall of the casing body (10) near one side of the top wall, a number of assembly parts (13) are provided. The number of the assembly parts (13) is the same as the number of the mounting holes (1101) on the horizontal hole group (11), and the assembly part (13) is located directly above the mounting hole (1101). A horizontal support rod (12) is provided on the assembly part (13). One end of the horizontal support rod (12) is fixedly provided with a connecting plate (1201). The connecting plate (1201) is arranged on the assembly part (13), and the bottom of the horizontal support rod (12) abuts against the ground.

2. A casing for a new cast-in-place pile foundation pit according to claim 1, characterized in that, An inner concave part (1102) is provided on one side of the inner sidewall of the casing body (10) where the mounting hole (1101) is located, and a convex part (1103) is provided on one side of the outer sidewall of the casing body (10).

3. A casing for a new cast-in-place pile foundation pit according to claim 2, characterized in that, One end of the transverse insertion rod (20) is a sharp end, and a limit block (21) is provided at the other end. After the transverse insertion rod (20) is inserted from the inner side of the mounting hole (1101), the limit block (21) is fitted with the inner concave part (1102).

4. A casing for a new cast-in-place pile foundation pit according to claim 3, characterized in that, The overall length of the transverse insertion rod (20) is less than two-thirds of the inner diameter of the casing body (10).

5. A casing for a new cast-in-place pile foundation pit according to claim 1, characterized in that, The connecting plate (1201) is welded to the assembly part (13).

6. A casing for a new cast-in-place pile foundation pit according to claim 1, characterized in that, The assembly part (13) includes a chute (1301) opened at the top of the casing body (10). A flange (1302) is provided at the edge of the chute (1301). Side grooves (1204) are opened on both sides of the connecting plate (1201) near one side of the horizontal support rod (12). Through holes of the same kind are opened on the side wall of the chute (1301) and on one side of the connecting plate (1201). The connecting plate (1201) is slidably arranged in the chute (1301), the flange (1302) abuts against the side groove (1204), and the through hole is fixed by a bolt.

7. A casing for a new cast-in-place pile foundation pit according to claim 3, characterized in that, A number of first positioning insertion holes (1202) are opened at the top of the horizontal support rod (12), and the same number of second positioning insertion holes (22) as the first positioning insertion holes (1202) are opened at the top of the transverse insertion rod (20).

8. A casing for a new cast-in-place pile foundation pit according to claim 7, characterized in that, When the limit block (21) on the transverse insertion rod (20) is completely embedded in the inner concave part (1102), the first positioning insertion hole (1202) and the second positioning insertion hole (22) are coaxial, and a vertical insertion rod (30) is inserted at each group of coaxial first positioning insertion holes (1202) and second positioning insertion holes (22).

9. A casing for a new cast-in-place pile foundation pit according to claim 8, characterized in that, The vertical insertion rod (30) includes an insertion rod body (33). A limit part (32) is provided at the top of the insertion rod body (33), and a pull ring (31) is provided at the top of the limit part (32).

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