Hard cutting anti-seepage device for secant piles and construction method thereof

Abstract

The invention provides a secant pile hard cutting anti-seepage device and a construction method thereof. The secant pile hard cutting anti-seepage device comprises a composite plate. The composite plate comprises a top plate, a middle plate, a bottom plate and connecting bolts; an upper connecting hole is formed in the lower portion of the top plate, a lower connecting hole is formed in the upper portion of the bottom plate, and middle connecting holes corresponding to the upper connecting hole and the lower connecting hole are formed in the upper end and the lower end of the middle plate respectively. The top plate, the middle plate and the bottom plate penetrate through the corresponding connecting holes through the connecting bolts to form a detachable vertical assembly structure; a flat plate anti-floating structure is arranged at the bottom of the bottom plate and used for being placed in a pile hole for stable positioning and resisting. According to the device, the technology of independent manufacturing and installation and overall hoisting is adopted, the problems that a construction site is narrow and installation is inconvenient are solved, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit construction, and in particular to a device for hard-cutting and anti-leakage of bite piles and a construction method thereof. Background Art

[0002] The full-rotation interlocking pile construction process utilizes a fully casing, full-rotation drilling rig. This technique integrates wall protection, soil and rock drilling, steel cage placement, and concrete pouring. This construction method offers the highest drilling accuracy and pile quality both domestically and internationally. The verticality of the drilled hole and pile can be controlled to within 3‰. The use of full steel casing during drilling prevents hole collapse, offering numerous advantages over traditional pile construction techniques. Consequently, it has been frequently adopted in recent years for foundation pit support projects involving large excavation areas, deep excavations, complex geology, and abundant groundwater.

[0003] Interlocking piles are typically divided into A piles and B piles. A piles are plain concrete piles, while B piles are reinforced concrete piles. The typical construction sequence is to construct two adjacent A piles first, followed by the middle B pile. The interlocking width is generally 1 / 3 of the pile diameter. A piles are typically cast using ultra-slow-setting concrete, with B piles poured before A piles begin to set. However, in actual construction, initial setting of A piles is unavoidable due to limited construction conditions. Therefore, constructing B piles requires hard cutting of A piles. This drilling and cutting process damages and cracks the A pile body. After the foundation pit is completed, these leaks become water seepage points in the pile wall, posing a safety hazard and compromising the pit's safety. Furthermore, the subsequent grouting and waterproofing process is expensive, slow, and complex. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and provide a device for hard-cutting and anti-leakage of bite piles and a construction method thereof.

[0005] The specific technical solutions are as follows: A device for hard cutting and anti-leakage of an occlusal pile, comprising: Composite plate; the composite plate includes a top plate, a middle plate, a bottom plate and connecting bolts; an upper connecting hole is provided at the lower part of the top plate, a lower connecting hole is provided at the upper part of the bottom plate, and middle connecting holes corresponding to the upper connecting hole and the lower connecting hole are provided at the upper and lower ends of the middle plate respectively; the top plate, the middle plate and the bottom plate form a detachable vertical assembly structure by the connecting bolts passing through the corresponding connecting holes; a flat anti-floating structure is provided at the bottom of the bottom plate for stable positioning and anti-floating when placed in the pile hole.

[0006] Optionally, the flat anti-floating structure is a circular bottom plate that matches the diameter of the pile hole, which plays a stabilizing and anti-floating role.

[0007] Optionally, the top plate, middle plate and bottom plate are all made of PVC material.

[0008] Optionally, through holes are provided on the outer sides of the top plate, the middle plate and the bottom plate.

[0009] Optionally, T-shaped support members are provided on the sides of the top plate, middle plate and bottom plate.

[0010] Optionally, both sides of the composite plate are configured to have an arc shape consistent with the arc-shaped plate in the pile hole.

[0011] Optionally, a plurality of positioning protrusions are provided on the bottom of the base plate for positioning the composite plate in the pile hole and preventing the composite plate from rotating.

[0012] Optionally, the connecting bolts are high-strength bolts.

[0013] Optionally, a hoisting hole is provided on the upper portion of the top plate for connecting a hoisting device to hoist the composite plate into the pile hole.

[0014] A construction method using the above-mentioned device for hard cutting and anti-seepage of occlusal piles comprises the following steps: Step 1: Determine the pile location that requires hard cutting construction; Step 2: Determine the length of the device and the number of required middle plates based on the designed pile length; Step 3: Produce the device in blocks at the construction site and assemble it on site; Step 4: Connect the bottom plate and the middle plate first, then connect the middle plate and the top plate; Step 5: After the pile hole is cleaned, the assembled device is hoisted to the bottom of the pile hole; Step 6: After the pile hole is cleaned, the device is hoisted to the bottom of the pile hole and concrete is poured; Step 7: Cut and construct the interlocking piles according to the design requirements.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This device adopts the technology of independent production and installation, and overall hanging, which solves the problems of narrow construction site and inconvenient installation, and improves construction efficiency. In addition, the present invention adopts a simple and feasible construction method, and takes measures before cutting the interlocking pile to provide protection for the plain concrete pile body, solving the problem that the pile body is easily damaged during hard cutting of the interlocking pile. The method of the present invention improves the quality of the interlocking pile body, effectively avoids water seepage from cracks in the pile body, and solves the problem of high cost of grouting and leak repair in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the base plate structure of this application; Figure 2 This is a schematic diagram of the middle plate structure of this application; Figure 3This is a schematic diagram of the top plate structure of this application; Figure 4 This is a schematic diagram of the overall structure of the composite plate and T-shaped support member of this application; Figure 5 This is a structural schematic diagram of the composite plate of the present application placed in the pile hole.

[0017] In the figure: 1. Composite plate; 11. Top plate; 12. Middle plate; 13. Bottom plate; 2. Flat anti-floating structure; 3. T-shaped support member. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0021] The present invention provides a device for preventing leakage by hard cutting of bite piles, referring to Figure 1-Figure 5 , including: a composite plate 1; the composite plate 1 includes a top plate 11, a middle plate 12, a bottom plate 13 and connecting bolts; an upper connecting hole is provided at the lower part of the top plate 11, a lower connecting hole is provided at the upper part of the bottom plate 13, and middle connecting holes corresponding to the upper connecting hole and the lower connecting hole are provided at the upper and lower ends of the middle plate 12 respectively; the top plate 11, the middle plate 12 and the bottom plate 13 are connected by connecting bolts passing through the corresponding connecting holes to form a detachable vertical assembly structure; a flat anti-floating structure 2 is provided at the bottom of the bottom plate 13, which is used to be placed in the pile hole for stable positioning and anti-floating.

[0022] Specifically, in this device, the composite panel 1 consists of a top plate 11, a middle plate 12, a bottom plate 13, and connecting bolts, forming a removable vertical assembly structure. This structure can be flexibly assembled according to construction requirements, adapting to varying pile lengths and pile hole diameters. The flat anti-floating structure 2 on the bottom plate 13 ensures the stability of the device within the pile hole, preventing it from floating or rotating. In actual operation, the device is placed within the hole of pile A. Construction workers can then directly cut the composite panels 1 between two adjacent piles A according to the construction requirements of pile B. This effectively solves the problem of pile A being easily damaged and leaking due to cracks in traditional hard cutting operations. The flat anti-floating structure 2 provides stable support for the cutting operation and comprehensively protects the pile, significantly reducing water seepage points in the pile wall and effectively preventing the risk of foundation pit leakage, thereby significantly improving project quality and reliability. Furthermore, this device eliminates the complex and later grouting and waterproofing process, significantly saving construction costs and time, and bringing significant economic benefits. Furthermore, the device is independently manufactured and hoisted, making it ideal for construction sites with limited space and complex installation conditions, greatly improving construction efficiency. Its design is ingenious, its structure is simple and it is easy to operate. It is a practical innovation in the field of interlocking pile construction.

[0023] Reference Figure 1 The flat anti-floating structure 2 is a circular base plate 13 that matches the diameter of the pile hole. As concrete pouring progresses, the concrete exerts an upward buoyant force on the device. The circular base plate 13, through its tight connection with the bottom of the pile hole and its own weight, effectively balances this buoyancy, preventing the device from floating upward and ensuring its positional stability during concrete pouring and subsequent cutting operations. The bottom of the circular base plate 13 is equipped with several positioning protrusions. When the device is subjected to torque generated by concrete pouring or cutting operations, the tight engagement between the positioning protrusions and the bottom of the pile hole effectively resists the device's tendency to rotate. Each positioning protrusion acts as a tiny blocking point, increasing the friction between the device and the bottom of the pile hole and its ability to resist torque. This ensures that the device maintains a stable position during construction and prevents positional shifts or cutting angle deviations due to rotation. Therefore, during the concrete pouring process, the device may be subjected to the lateral force and buoyancy generated by the flow of concrete. Due to its shape and close fit with the pile hole, the circular base plate 13 can form a certain streamlined guidance when the concrete flows, reducing the impact force and lateral torque of the concrete on the device, thereby maintaining the stability of the device in a dynamic construction environment.

[0024] The top plate 11, middle plate 12, and bottom plate 13 are all made of PVC. PVC (polyvinyl chloride) has excellent corrosion resistance and effectively resists the attack of various chemical substances in the underground environment, such as acids, alkalis, and salts. In complex underground environments, traditional metal materials are susceptible to corrosion, resulting in a decrease in structural strength, affecting the lifespan and safety of the device. However, the PVC top plate 11, middle plate 12, and bottom plate 13 maintain long-term structural integrity and stability, ensuring the device's reliability and durability in harsh environments. PVC's relatively low density significantly reduces the device's weight compared to traditional metal or concrete. This weight reduction not only facilitates transportation and installation, but also reduces pressure on the pile hole wall, reducing safety risks during construction and facilitating cutting. The lightweight design also helps improve construction efficiency, especially in construction scenarios requiring frequent assembly and disassembly.

[0025] Reference Figure 4 T-shaped supports 3 are provided on the sides of the top plate 11, the middle plate 12, and the bottom plate 13. The T-shaped supports 3 on both sides face the side close to the two adjacent A piles, so that the T-shaped supports 3 can act as solid lateral fulcrums to effectively offset the lateral force generated during concrete pouring, enhance the lateral stability of the device in the pile hole, and ensure that it will not be displaced or shaken under the action of lateral force, thereby improving the accuracy and safety of construction. When pouring concrete, the special shape design of the T-shaped supports allows concrete to be poured simultaneously in the two A pile holes, effectively preventing the uneven pressure generated by the concrete on the device during the flow process, ensuring that the concrete in the A pile holes on both sides can be filled synchronously, and improving the quality of concrete pouring. At the same time, this synchronous pouring method improves construction efficiency, reduces pouring time, and speeds up project progress. Through holes are provided on the outside of the top plate 11, the middle plate 12, and the bottom plate 13. When pouring the B pile between the two A piles, during the pouring process, the concrete can pass through these through holes, forming an anchoring effect, making the connection between the composite plate 1 and the concrete tighter, and enhancing the integrity of the device and the concrete. This tight combination not only improves the stability and bearing capacity of the device, but also reduces the gap that may be generated between the composite plate 1 and the concrete, thereby effectively reducing the risk of groundwater infiltration and enhancing the waterproof performance of the foundation pit. The presence of the outer through holes can also increase the surface area of the device, providing more gripping points for the concrete, thereby improving the pull-out resistance and shear resistance of the device. In a complex construction environment, the device needs to withstand various complex stresses, such as the expansion force of concrete, groundwater pressure, etc. The through-hole design can enable the device to better adapt to these stress changes, enhance its ability to resist various adverse factors, and ensure the reliability and durability of the device during long-term use.

[0026] Reference Figure 5The two sides of the composite plate 1 are designed to have an arc shape consistent with the arc-shaped plates in the pile hole, enabling the composite plate 1 to fit tightly against the inner wall of the pile hole, thereby significantly increasing the contact area between the composite plate 1 and the inner wall of the pile hole. This tight fit greatly enhances the stability of the device within the pile hole. During the concrete pouring and subsequent interlocking pile cutting process, the device can effectively resist interference from various external forces, such as the impact force of the concrete, the lateral force generated by the flow, and the vibration generated during cutting, ensuring that the device will not shift or shake, providing a stable platform for construction and ensuring construction accuracy and safety.

[0027] The use of high-strength bolts for the connecting bolts enhances the integrity of the device. During construction, external forces acting on the device are effectively transmitted and distributed to the various components via the high-strength bolts, forming an organic whole. For example, when lateral forces generated during concrete pouring act on the device, the high-strength bolts evenly transmit the force to the top plate 11, middle plate 12, and bottom plate 13, enabling the entire device to work together to resist external forces, reduce local stress concentration, and improve the device's load-bearing capacity and stability.

[0028] The top plate 11 is provided with a lifting hole on its upper portion for connecting to a lifting device to lower the composite panel 1 into the pile hole. During the lifting process, the lifting device and the device form a stable whole through the lifting hole, allowing the device to be smoothly lowered into the pile hole along a predetermined trajectory. This precise connection of the lifting hole, combined with the operating accuracy of the lifting device, ensures that the device always maintains the correct posture and position during the lifting process, avoiding collision with the pile hole wall, thereby protecting the device and the pile hole structure from damage.

[0029] A construction method of a device for hard-cutting and leak-proofing of interlocking piles comprises the following steps: Step 1: Determine the pile location that requires hard cutting construction; Step 2: Determine the length of the device and the number of middle plates 12 required based on the designed pile length; Step 3: Make the device in blocks at the construction site and assemble it on site; Step 4: First connect the bottom plate 13 and the middle plate 12, and then connect the middle plate 12 and the top plate 11; Step 5: After the pile hole is cleaned, the assembled device is hoisted to the bottom of the pile hole; Step 6: After the pile hole is cleaned, the device is hoisted to the bottom of the pile hole and concrete is poured; Step 7: Cut and construct the interlocking piles according to the design requirements.

[0030] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for hard cutting and anti-leakage of bite piles, characterized in that: include: Composite plate; the composite plate includes a top plate, a middle plate, a bottom plate and connecting bolts; an upper connecting hole is provided at the lower part of the top plate, a lower connecting hole is provided at the upper part of the bottom plate, and middle connecting holes corresponding to the upper connecting hole and the lower connecting hole are provided at the upper and lower ends of the middle plate respectively; the top plate, the middle plate and the bottom plate form a detachable vertical assembly structure by the connecting bolts passing through the corresponding connecting holes; a flat anti-floating structure is provided at the bottom of the bottom plate for stable positioning and anti-floating when placed in the pile hole.

2. The device for hard cutting and anti-leakage of bite piles according to claim 1, characterized in that: The flat anti-floating structure is a circular bottom plate that matches the diameter of the pile hole and plays a stabilizing and anti-floating role.

3. The device for hard cutting and anti-leakage of occlusal piles according to claim 1, characterized in that: The top plate, middle plate and bottom plate are all made of PVC material.

4. The device for hard cutting and anti-leakage of occlusal piles according to claim 1, characterized in that: The outer sides of the top plate, the middle plate and the bottom plate are all provided with through holes.

5. The device for hard cutting and anti-leakage of occlusal piles according to claim 1, characterized in that: The sides of the top plate, the middle plate and the bottom plate are all provided with T-shaped support pieces.

6. The device for hard cutting and anti-leakage of bite piles according to claim 1, characterized in that: Both sides of the composite plate are designed to be in an arc shape consistent with the arc-shaped plate in the pile hole.

7. The device for hard cutting and anti-leakage of bite piles according to claim 1, characterized in that: The bottom of the bottom plate is provided with a plurality of positioning protrusions for positioning in the pile hole and preventing the composite plate from rotating.

8. The device for hard cutting and anti-leakage of bite piles according to claim 1, characterized in that: The connecting bolts are high-strength bolts.

9. The device for hard cutting and preventing leakage of occlusal piles according to claim 1, characterized in that: A hoisting hole is provided on the upper portion of the top plate for connecting a hoisting device to hoist the composite plate into the pile hole.

10. A construction method using the device for hard cutting and anti-leakage of occlusal piles according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Determine the pile location that requires hard cutting construction; Step 2: Determine the length of the device and the number of required middle plates based on the designed pile length; Step 3: Produce the device in blocks at the construction site and assemble it on site; Step 4: Connect the bottom plate and the middle plate first, then connect the middle plate and the top plate; Step 5: After the pile hole is cleaned, the assembled device is hoisted to the bottom of the pile hole; Step 6: After the pile hole is cleaned, the device is hoisted to the bottom of the pile hole and concrete is poured; Step 7: Cut and construct the interlocking piles according to the design requirements.

Images