A rapid construction method for cast-in-place pile casings

Abstract

This invention discloses a rapid-construction cast-in-place pile casing and its construction method, relating to the field of building construction. The casing consists of two hinged semi-circular tubes, with an iron ring connecting an anchoring assembly on the outer wall. The anchoring assembly includes a stud shell with a sliding rail and an internally threaded anchor bolt, with a retractable arc-shaped steel plate connected to the bottom of the anchor bolt. During construction, rotating the anchor bolt causes the steel plate to insert into the soil and expand for fixation, then connecting the casing via a connecting assembly. This invention overcomes the limitations of traditional methods requiring prior backfilling and has three major advantages: 1) the anchoring assembly can be quickly disassembled and reused; 2) the modular casing is easy to open and close, and securely fixed with clips; 3) it eliminates the backfilling and excavation process, improving construction efficiency. It is particularly suitable for soft soil, quicksand, and other adverse geological conditions, solving problems such as long construction periods, difficult soil handling, and poor construction quality during the rainy season associated with traditional methods, resulting in significant economic benefits.

Description

Technical Field

[0001] This invention relates to the field of grouting in building construction, and more particularly to a grouting pile casing that can be constructed quickly. Background Technology

[0002] Casings (usually steel cylinders) are used to fix the pile position during the drilling stage. They are applicable to the construction field and prevent the collapse of the hole wall caused by loose soil, quicksand or groundwater erosion. They are indispensable, especially in adverse geological conditions such as soft soil and sand layers. The rational use and improvement of casing devices directly affect the success or failure of pile foundations and the overall project benefits.

[0003] Currently in the construction industry, the conventional practice in traditional cast-in-place pile construction is to backfill soil to above the design elevation of the pile top before proceeding with construction. This backfilling process often requires the allocation of large quantities of earth and the use of appropriate machinery for compaction, which is time-consuming. After the cast-in-place piles are completed, excavation is necessary to remove the large amount of backfilled soil. This requires the use of excavators and other equipment, and care must be taken to avoid damaging the completed cast-in-place piles during excavation, as they are a critical part of the foundation structure. Damage to these piles could affect the safety of the entire building. The excavated soil also needs to be properly stockpiled or transported. If the construction site is narrow, stockpiling the soil can take up valuable space. Limited space hinders the progress of other processes. If external transportation is chosen, it will increase transportation costs and traffic pressure. During the rainy season, heavy rainfall during backfilling will cause the moisture content of the backfill soil to increase sharply, which may turn the backfill soil into a muddy state, making it impossible to carry out normal compaction. Moreover, continuing to backfill under such conditions will reduce the quality of the backfill soil and may lead to problems such as settlement later. This will also consume a lot of time, manpower and resources. From a time perspective, the backfilling and compaction of earthwork, the construction of cast-in-place piles and the subsequent earthwork excavation are carried out sequentially. Delays in each stage will cause the overall project progress to be delayed. Therefore, the conventional method of backfilling before constructing cast-in-place piles has certain limitations. Summary of the Invention

[0004] To overcome the above shortcomings, this invention provides a rapid-construction cast-in-place pile casing and construction method. The rapid-construction cast-in-place pile casing breaks away from the conventional practice of backfilling soil to above the design elevation of the pile top before construction, replacing the disadvantages of conventional backfilling and construction. It combines the advantages of convenient installation, stable fixing, and reusability, and can effectively cope with various complex external force conditions during the construction of cast-in-place piles, ensuring construction safety and quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: the rapid construction cast-in-place pile casing includes a casing, an anchoring assembly and a connecting assembly, the key technical point of which is: an iron ring is fixedly connected to the outer wall of the casing;

[0006] One end of the connecting component is detachably connected to the iron ring, and the anchoring component is detachably connected to the other end of the connecting component;

[0007] The connecting assembly includes a hook and a connecting rod, the hook being disposed at one end of the connecting rod near the protective sleeve;

[0008] The anchoring assembly includes a stud shell and a stud, the stud being disposed inside the stud shell. The stud includes a knob, an anchor bolt, and a drill bit, the knob being disposed at the top of the anchor bolt, and the drill bit being disposed at the end of the anchor bolt away from the knob.

[0009] Furthermore, the anchor bolt is threaded with a slider, the outer wall of the slider is provided with a pulley, and the inner wall of the bolt shell is provided with a slide rail, the pulley being rotatably connected inside the slide rail.

[0010] Furthermore, the protective sleeve is composed of two symmetrical semi-circular tubes, with a hinge rotatably connected between the two semi-circular tubes. A fastening baffle is fixedly connected to the side of each semi-circular tube away from the hinge, and a fastening buckle is detachably connected to the fastening baffle.

[0011] Furthermore, several steel plates are evenly and uniformly fixedly connected to the bottom end of the slider in a ring.

[0012] Furthermore, the drill bit is a hollow cone.

[0013] Furthermore, a limiting strip is fixedly connected to the outer side of the stud shell.

[0014] Furthermore, the steel sheet is an arc-shaped sheet with a sharp bottom end.

[0015] Furthermore, the steel sheet is disposed inside the drill bit.

[0016] The construction method for this rapid-construction cast-in-place pile casing includes the following steps:

[0017] When using this rapid construction cast-in-place pile casing, first insert the drill bit into the construction site. Four steel plates are connected below the slider. The slider moves the steel plates to expand and contract within the soil by rotating the anchor bolts.

[0018] When the anchor bolt is rotated, the slider moves vertically along the corresponding threaded structure on the bolt shell. If the anchor bolt is rotated clockwise, the slider moves downwards, causing the four steel plates below to insert into the soil. These steel plates cleverly utilize an arc shape for easier insertion. As the slider continues to move downwards, the steel plates gradually expand like an umbrella, making full contact with and interacting with the surrounding soil. During this process, the compressive force generated by the expansion of the steel plates causes a reaction force from the soil, which helps to further stabilize the anchor bolt. When disassembly is required, rotating the anchor bolt counterclockwise moves the slider upwards, causing the steel plates to retract, facilitating removal from the soil. The anchor bolt can be rotated by turning a knob.

[0019] The casing is placed on the drilled pile hole, or it can be placed after the concrete of the cast-in-place pile has been poured to the existing ground height. Choosing the right time to place it ensures that the casing is accurately positioned on the soil. Then, the anchoring components and the casing are connected by connecting components. The specific steps are to connect the hook to the iron ring, and connect the hook and the stud shell to the two ends of the connecting rod, respectively. The three connecting components are evenly connected to the casing at 120-degree intervals. When disassembly is required, the hook and the iron ring can be removed.

[0020] The present invention has the following beneficial effects:

[0021] 1. In this invention, the rotation of the anchor bolt causes the slider to move the steel plates within the soil, expanding and contracting. When the anchor bolt is rotated, the slider moves vertically along the corresponding threaded structure on the stud shell. If the anchor bolt is rotated clockwise, the slider moves downward, thereby driving the four steel plates below to insert into the soil. The steel plates cleverly utilize arc-shaped plates, making insertion into the soil more convenient. The entire process is relatively simple to operate, and the expansion and contraction of the steel plates can be flexibly adjusted according to construction requirements, playing a corresponding role in different construction stages. It can provide a stable support effect during construction and facilitate subsequent disassembly and reuse, improving the practicality and convenience of the device.

[0022] 2. In this invention, the hook is connected to the iron ring, and the two ends of the connecting rod are respectively connected to the hook and the stud shell. Several connecting components are evenly distributed in a ring on the protective sleeve, which improves stability and safety. When disassembly is required, the hook and the iron ring can be removed. This operation realizes a convenient and firm connection between the stud shell and the protective sleeve through the connecting components. The protective sleeve can be closed and opened by the action of the hinge. The fastening buckle can be fixed by rotating it. When the fastening buckle is fixed, it will drive the protective sleeve to be fixed, realizing the closure or opening of the protective sleeve. This lays the foundation for the subsequent fixing of the protective sleeve and achieves the function of free fixing and disassembly between various components. It solves the cumbersome problems caused by the difficulty in disassembling the protective sleeve and anchoring components during construction, and improves the convenience and practicality of the device. Attached Figure Description

[0023] Figure 1 This is a perspective view of a cast-in-place pile casing for rapid construction proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the steel sheet structure of a cast-in-place pile casing for rapid construction proposed in this invention;

[0025] Figure 3 This is a schematic diagram of the slider structure of a cast-in-place pile casing for rapid construction proposed in this invention;

[0026] Figure 4 This is a schematic diagram of the stud shell structure of a cast-in-place pile casing for rapid construction proposed in this invention;

[0027] Figure 5 This is a schematic diagram of the connecting rod structure for a cast-in-place pile casing that allows for rapid construction, as proposed in this invention.

[0028] Legend:

[0029] 1. Casing; 2. Iron ring; 3. Connecting rod; 4. Stud shell; 5. Hinge; 6. Soil; 7. Hook; 8. Fastening buckle; 9. Fastening baffle; 10. Knob; 11. Limiting strip; 12. Slide rail; 13. Pulley; 14. Anchor bolt; 15. Sliding block; 16. Drill bit; 17. Steel sheet. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Reference Figure 1-5 The present invention provides an embodiment of a rapid construction cast-in-place pile casing, comprising a casing 1, an anchoring assembly and a connecting assembly, wherein an iron ring 2 is fixedly connected to the outer wall of the casing 1;

[0033] One end of the connecting component is detachably connected to the iron ring 2, and the anchoring component is detachably connected to the other end of the connecting component;

[0034] The connecting assembly includes a hook 7 and a connecting rod 3, wherein the hook 7 is disposed at one end of the connecting rod 3 near the protective sleeve 1;

[0035] The anchoring assembly includes a stud shell 4 and a stud, the stud being disposed inside the stud shell 4. The stud includes a knob 10, an anchor bolt 14, and a drill bit 16. The knob 10 is disposed at the top of the anchor bolt 14, and the drill bit 16 is disposed at the end of the anchor bolt 14 away from the knob 10.

[0036] Example 2

[0037] Based on Embodiment 1, the anchor bolt 14 is threadedly connected to a slider 15, the outer wall of the slider 15 is provided with a pulley 13, the inner wall of the bolt shell 4 is provided with a slide rail 12, and the pulley 13 is rotatably connected inside the slide rail 12.

[0038] The casing 1 is composed of two symmetrical semi-circular tubes, with a hinge 5 rotatably connected between the two semi-circular tubes. A fastening baffle 9 is fixedly connected to the side of the semi-circular tube away from the hinge 5, and a fastening buckle 8 is detachably connected to the fastening baffle 9. The drill bit 16 is a hollow cone. A limit strip 11 is fixedly connected to the outside of the stud shell 4. The steel plate 17 is disposed inside the drill bit 16.

[0039] A construction method for a rapid-construction cast-in-place pile casing is disclosed. When using this rapid-construction cast-in-place pile casing, the drill bit 16 is first inserted into the construction site. Four steel plates 17 are connected below the slider 15. The rotation of the anchor bolt 14 causes the slider 15 to move the steel plates 17 within the soil, expanding and contracting. When the anchor bolt 14 is rotated, the slider 15 moves vertically along the corresponding threaded structure on the stud shell. If the anchor bolt 14 is rotated clockwise, the slider 15 moves downwards, thereby driving the four steel plates 17 below to insert into the soil. The steel plates 17 cleverly utilize an arc shape for easier insertion into the soil. As the slider 15 continues to move downwards, the steel plates 17 gradually expand like an umbrella. The steel plate 17 fully contacts and interacts with the surrounding soil. During this process, the compressive force generated by the expansion of the steel plate 17 will cause the soil to generate a reaction force on the steel plate 17. These reaction forces help to further stabilize the anchor bolt 14. When disassembly is required, the anchor bolt 14 is rotated counterclockwise, the slider 15 moves upward, and the steel plate 17 retracts accordingly, making it easy to pull out of the soil. The rotation of the anchor bolt 14 can be driven by rotating the knob 10. The whole process is relatively simple to operate, and the steel plate 17 can be flexibly extended and retracted according to construction requirements, playing its corresponding role in different construction stages. It can provide a stable support effect during construction and facilitate subsequent disassembly and reuse.

[0040] The casing 1 is placed on the drilled pile hole, or it can be placed after the cast-in-place pile concrete has been poured to the existing ground level. Choosing the appropriate placement time ensures that the casing is accurately positioned on the soil 6. Then, the anchoring components and casing 1 are connected using connecting components. Specifically, the hook 7 is connected to the iron ring 2, and the two ends of the connecting rod 3 are connected to the hook 7 and the stud shell 4, respectively. The three connecting components are evenly connected to the casing 1 at 120-degree intervals, which improves stability and safety. When disassembly is required, the hook 7 and iron ring 2 are connected... Disassembly is possible. This operation enables a convenient and secure connection between the stud shell 4 and the casing 1 via the connecting component. The casing 1 can be closed and opened by the hinge 5. Rotating the fastening buckle 8 can fix the fastening baffle 9. When the fastening baffle 9 is fixed, it will drive the casing 1 to be fixed, realizing the closure or opening of the casing 1. This lays the foundation for the subsequent fixing of the casing 1 and achieves the function of free fixing and disassembly between various components. It solves the cumbersome problems caused by the difficulty in disassembling the casing 1 and the anchoring component during construction, and improves the convenience and practicality of the device.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A fast construction cast-in-place pile casing, comprising a casing (1), an anchoring assembly and a connecting assembly, characterized in that: The outer wall of the casing (1) is fixedly connected with an iron ring (2); One end of the connecting assembly is detachably connected to the iron ring (2), and the anchoring assembly is detachably connected to the other end of the connecting assembly; The connecting assembly comprises a hook (7) and a connecting rod (3), and the hook (7) is arranged at one end of the connecting rod (3) close to the casing (1); The anchoring assembly comprises a stud shell (4) and a stud, the stud is arranged in the interior of the stud shell (4), the stud comprises a knob (10), an anchor bolt (14) and a drill bit (16), the knob (10) is arranged at the top end of the anchor bolt (14), and the drill bit (16) is arranged at one end of the anchor bolt (14) away from the knob (10); A sliding block (15) is threadedly connected to the anchor bolt (14), an outer wall of the sliding block (15) is provided with a pulley (13), and an inner wall of the stud shell (4) is provided with a sliding rail (12), and the pulley (13) is rotationally connected in the interior of the sliding rail (12); A plurality of steel sheets (17) are fixedly connected to the bottom end of the sliding block (15) in a ring shape; The drill bit (16) is a hollow cone; The steel sheets (17) are arc-shaped sheets with sharp bottom ends; The steel sheets (17) are arranged in the interior of the drill bit (16).

2. A fast construction cast-in-place pile casing according to claim 1, characterized in that: The casing (1) is composed of two symmetrical half-circular pipe bodies, a hinge (5) is rotationally connected between the two half-circular pipe bodies, a fastening baffle (9) is fixedly connected to one side of the half-circular pipe body away from the hinge (5), and a fastening buckle (8) is detachably connected to the fastening baffle (9).

3. A fast construction cast-in-place pile casing according to claim 1, characterized in that: A limiting strip (11) is fixedly connected to the outer side of the stud shell (4).

4. The method according to any one of claims 1 to 3, wherein the method is characterized in that, The method comprises the following steps: When the casing for the cast-in-place pile is used, the drill bit (16) is first inserted into the construction site, the sliding block (15) is connected with the four steel sheets (17) below, and the sliding block (15) drives the steel sheets (17) to stretch and expand in the soil body by rotating the anchor bolt (14); When the anchor bolt (14) is rotated, the sliding block (15) moves in the vertical direction on the stud shell along the corresponding thread structure, if the anchor bolt (14) is rotated clockwise, the sliding block (15) moves downward, thereby driving the four steel sheets (17) below to be inserted into the soil body, the steel sheets (17) are arc-shaped sheets, which are more convenient to insert into the soil body, as the sliding block (15) continues to move downward, the steel sheets (17) gradually expand like an umbrella, fully contact and interact with the surrounding soil body, in this process, the extrusion force generated by the expansion of the steel sheets (17) causes the soil body to generate a reaction force on the steel sheets (17), which helps to further stabilize the anchor bolt (14), when disassembly is required, the anchor bolt (14) is rotated counterclockwise, the sliding block (15) moves upward, and the steel sheets (17) are retracted, thereby being convenient to be pulled out of the soil body, the rotation of the anchor bolt (14) can be driven by rotating the knob (10), The casing (1) is placed on the pile hole, or placed after the cast-in-place pile concrete is poured to the existing ground level, and the casing is accurately positioned on the soil (6) by selecting a suitable placement time, and then the anchoring assembly and the casing (1) are connected through the connecting assembly, specifically, the hook (7) is connected with the iron ring (2), the connecting rod (3) is connected with the hook (7) and the bolt shell (4) at two ends, and the three connecting assemblies are uniformly connected around the casing (1) at intervals of 120 degrees, and when disassembly is needed, the hook (7) and the iron ring (2) are disassembled.

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