Novel pile sealing and water stopping structure for anchor rod static pressure pile

Abstract

The novel pile sealing and water stopping structure comprises the anchor rod static pressure pile, the anchor rod static pressure pile is pressed into soil along a pile pressing hole of a bottom plate, a cushion layer is arranged at the bottom of the bottom plate, and the anchor rod static pressure pile is formed by connecting at least one section of pipe pile up and down. The novel pile sealing and water stopping structure comprises an integrated annular expansion water stopping belt which is arranged on the outer diameter of the uppermost pipe pile in a sleeving mode and located in a pile pressing hole, and the annular expansion water stopping belt is used for blocking a gap between the uppermost pipe pile and a bottom plate. A gasket which is tightly pressed on the upper end surface of the annular expansion water-stop belt is mounted on the uppermost section of pipe pile; and a pile cap is poured in the pile pressing hole in the top of the annular expansion water-stop belt. The existing water stop strip for sealing the anchor rod static pressure pile is changed from a strip shape to an integrated ring shape, and the problem that the sealing performance of the connector section of the existing strip-shaped water stop strip is poor is solved. An annular steel washer is installed above the annular expansion waterstop, and it can be guaranteed that the annular expansion waterstop is smoothly pressed into the corresponding position.

Description

Technical Field

[0001] The utility model relates to the construction of anchor static pressure piles, and particularly to a novel pile sealing and water stop structure for anchor static pressure piles. Background Art

[0002] The anchor static pressure pile is a technology widely used in the reinforcement of building foundations. Its remarkable features include a simple construction process, high speed, and significant reinforcement effect. This technology mainly connects the pile frame and the foundation into a whole by using anchor rods, and presses the anchor rods into the foundation soil by means of the self-weight of the building. After this process, the anchor rods are closely combined with the building foundation by means of pile sealing to form a whole that bears force together.

[0003] Before the implementation of the anchor static pressure pile pressing, a pile pressing hole will be opened on the floor slab. The diameter of this hole is slightly larger than the diameter of the anchor rod itself, thus forming a certain gap between the two. When the groundwater level is higher than the building foundation surface, the groundwater will seep out through the gap between the floor slab and the pile. In order to prevent water leakage caused by the gap between the anchor static pressure pile and the floor slab, it is necessary to seal and treat the pile hole.

[0004] Generally, the water swelling property of the water stop strip is utilized to install a water stop belt between the anchor static pressure pile and the building floor slab. Then, the pile sealing material is poured to complete the process of sealing and water stopping. However, the sealing effect of the strip water stop belt at the joint lap is often not ideal. If not properly treated, water leakage is likely to occur. Therefore, it is very necessary to improve the commonly used water stop and pile sealing structure to improve its sealing performance and avoid water leakage. Summary of the Utility Model

[0005] The utility model provides a novel pile sealing and water stop structure for anchor static pressure piles, which includes an anchor static pressure pile. The anchor static pressure pile is pressed into the soil along the pile pressing hole of the floor slab. A cushion layer is provided at the bottom of the floor slab. The anchor static pressure pile is formed by connecting at least one upper and lower pipe pile. The novel pile sealing and water stop structure includes an integral annular expansion water stop belt sleeved on the outer diameter of the uppermost pipe pile and located in the pile pressing hole. The annular expansion water stop belt is used to seal the gap between the uppermost pipe pile and the floor slab;

[0006] A washer is installed on the uppermost pipe pile and pressed against the upper end face of the annular expansion water stop belt;

[0007] A pile cap is poured in the pile pressing hole at the top of the annular expansion water stop belt.

[0008] Further, the pile cap is made of concrete.

[0009] Furthermore, a water-stop and pile-sealing material is filled between the outer wall of the annular expansion water-stop belt and the inner wall of the pile pressing hole.

[0010] Furthermore, the annular expansion water-stop belt is an annular frustum with a wider upper part and a narrower lower part, and the side wall of the annular frustum is an arc surface.

[0011] Furthermore, the washer is an annular steel washer that is slidably sleeved on the topmost section of the pipe pile and can move up and down along the steel pipe. The diameter of the washer is smaller than the top surface diameter of the annular expansion water-stop belt.

[0012] By changing the current strip-shaped water-stop strip used for sealing piles in the anchor rod static pressure pile into an integral annular shape, the problem of poor sealing performance at the interface section of the current strip-shaped water-stop belt is solved. According to the construction characteristics of the on-site anchor rod static pressure pile and the stress mechanism of the water-stop belt, by making corresponding adjustments to the cross-section of the water-stop belt, changing the position layout of the water-stop belt, and installing an annular steel washer above the annular expansion water-stop belt, not only can the annular expansion water-stop belt be smoothly pressed into the corresponding position, enabling the annular expansion water-stop belt to expand radially when encountering water, but also the strength of the annular expansion water-stop belt when being squeezed in the vertical direction can be improved, so as to facilitate the full play of its good water-sealing performance. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of a new pile-sealing and water-stop structure of the present invention;

[0015] Figure 2 It is a top view of the annular expansion water-stop belt and its top washer of the present invention;

[0016] Figure 3 It is Figure 2 a side view of

[0017] Figure 4 It is a schematic diagram of accessing the last section of the pipe pile;

[0018] Figure 5 It is a schematic diagram of installing the annular expansion water-stop belt and the washer on the last section of the pipe pile;

[0019] Figure 6 It is a schematic diagram of pressing the last section of the pipe pile into the specified depth;

[0020] Figure 7Schematic diagram of grouting in the pile pressing hole to form a pile cap. Detailed implementation mode

[0021] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some technical features well known in the art are not described.

[0022] In order to thoroughly understand the present utility model, detailed steps and detailed structures will be presented in the following description to explain the technical solution of the present utility model. The preferred embodiments of the present utility model are described in detail as follows. However, in addition to these detailed descriptions, the present utility model can also have other implementation manners.

[0023] Refer to Figures 1-3 As shown in the figure, the present utility model provides a novel pile sealing and water stopping structure for anchor rod static pressure piles, which includes an anchor rod static pressure pile 5. The anchor rod static pressure pile 5 is pressed into the soil along the pile pressing hole 11 of the floor slab 1. The anchor rod static pressure pile 5 is formed by connecting at least one upper and lower pipe pile. The pile sealing and water stopping structure of the present utility model includes an integral annular expansion water stop belt 3 sleeved on the outer diameter of the uppermost pipe pile and located in the pile pressing hole 11. The annular expansion water stop belt 3 radially expands when encountering water, thereby sealing the gap between the uppermost pipe pile of the anchor rod static pressure pile 5 and the floor slab 1. In order to further ensure the sealing effect, a water stopping material can be filled between the outer wall of the annular expansion water stop belt 3 and the inner wall of the pile pressing hole 11.

[0024] Concrete is poured in the pile pressing hole 11 at the top of the annular expansion water stop belt 3 to form a pile cap. When pouring the pile cap in the pile pressing hole 11 above the annular expansion water stop belt 3, it is necessary to ensure that the concrete is fully vibrated and compacted without air bubbles and voids to ensure the strength and durability of the pile cap.

[0025] In one embodiment, the annular expansion water stop belt 3 is an annular frustum with a wider upper part and a narrower lower part, as Figure 3 shown, and the side wall of the annular frustum is an arc surface. With this design, during the pile pressing process, the outer edge of the annular expansion water stop belt 3 can more easily gradually fit the inner wall of the pile pressing hole as the pile pressing goes deeper, forming a closer contact surface, thereby enhancing the water stopping effect. At the same time, the design of the annular frustum also increases the stability of the water stop belt when being squeezed in the vertical direction, preventing it from deforming or shifting due to uneven pressure.

[0026] Furthermore, in order to improve the sealing performance between the annular expansion water stop belt 3 and the floor slab 1, the inner wall of the pile pressing hole 11 can be cleaned and pre-treated before its installation to ensure that the surface is flat and free of impurities, so that the water stop belt can fit more closely.

[0027] When the pile body undergoes minor deformation, the annular expansion water stop belt 3 can be adjusted to a certain extent by virtue of its good elasticity and toughness to maintain its close fit with the pile body and the floor slab, ensuring the continuous effectiveness of the water stop effect.

[0028] In one embodiment, a metal washer 2 is provided on the uppermost section of the pipe pile. The washer 2 is pressed tightly on the upper surface of the annular expansion water stop belt 3 to play a fixing role for the annular expansion water stop belt 3 and prevent the annular expansion water stop belt 3 from slipping. Preferably, the washer 2 can move up and down during the jacked pile driving to facilitate uniform pressure on the annular expansion water stop belt 3. The diameter of the washer 2 is not greater than the top surface diameter of the annular expansion water stop belt 3, which can reduce the use of steel and lower the cost.

[0029] As Figures 4-7 , the implementation steps of this embodiment are as follows:

[0030] 1) First, before the uppermost section of the pipe pile of the anchor jacked pile 5 is jacked, the annular expansion water stop belt 3 is installed at a certain distance below the pipe pile, and then the washer 2 is installed on the top of the annular expansion water stop belt 3, as Figures 4-5 shown.

[0031] 2) The anchor jacked pile 5 is pressed to the design elevation, and the annular expansion water stop belt 3 and the washer 2 are also sent to the corresponding positions. During the pile driving process, as the anchor jacked pile 5 is pressed deeper, the annular expansion water stop belt 3 radially expands after contacting water and gradually fits the inner wall of the pile driving hole, forming a tight contact surface to achieve the sealing and water stop effect, as Figure 6 shown.

[0032] 3) After the water stop is completed, concrete is poured into the pile driving hole 11 at the top of the annular expansion water stop belt 3 to form a "T"-shaped pile cap, as Figure 7 shown.

[0033] In summary, the advantages of the present utility model are as follows:

[0034] 1. Enhance the water stop performance: Through the design of the annular expansion water stop belt, not only the stability of the water stop belt during the pile driving process is improved, but also its sealing performance with the pile body and the floor slab is significantly enhanced. The design of the annular frustum ensures that the water stop belt can fit the hole wall more tightly when being extruded, effectively preventing water penetration and providing a strong guarantee for the waterproof safety of the engineering structure.

[0035] 2. The metal washer further consolidates the connection between the annular expansion water stop belt and the pipe pile, effectively preventing the problems of the water stop belt slipping or shifting. The washer can move up and down, which not only simplifies the installation process, but also ensures that the washer can apply uniform pressure on the water stop strip, is convenient for adjustment, and improves the construction efficiency.

[0036] 3. Improve construction efficiency: The structure of the utility model is simple and the installation is convenient, which greatly shortens the construction period. During the pile pressing process, the automatic fitting and sealing of the water stop belt can be realized, without additional fixing or adjusting steps, reducing the construction difficulty and cost.

[0037] 4. Wide applicability: The utility model is not only applicable to the pile sealing and water stop requirements of anchor static pressure piles, but can also be appropriately modified and adjusted according to actual needs for application in other types of pile foundation projects, such as precast pipe piles, cast-in-place piles, etc., with wide applicability and promotion value.

[0038] In summary, the novel pile sealing and water stop structure for anchor static pressure piles provided by the utility model has many advantages and remarkable technical effects. It not only improves the water stop efficiency and reliability, enhances the structural stability and durability, simplifies the construction process and reduces the construction cost, but also has a wide application range and the characteristics of environmental protection and energy conservation. Therefore, this structure has broad application prospects and market value in the fields of foundation reinforcement and waterproof engineering.

[0039] The preferred embodiments of the utility model have been described above. It should be understood that the utility model is not limited to the above specific embodiments, and the equipment and structures not described in detail should be understood to be implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications to the technical solution of the utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the technical solution of the utility model still fall within the scope of protection of the technical solution of the utility model.

Claims

1. A novel pile sealing and water-stopping structure for anchor static pressure piles, comprising an anchor static pressure pile (5), wherein the anchor static pressure pile (5) is pressed into the soil along a pile pressure hole (11) of a bottom plate (1), a cushion layer (4) is provided at the bottom of the bottom plate (1), and the anchor static pressure pile (5) is formed by connecting at least one upper and lower pipe pile, characterized in that: The novel pile sealing and water-stopping structure comprises an integrated annular expansion water-stopping strip (3) which is sleeved on the outer diameter of the uppermost pipe pile and located in the pile-pressing hole (11); the annular expansion water-stopping strip (3) is used to seal the gap between the uppermost pipe pile and the bottom plate (1) after swelling in contact with water; A gasket (2) is installed on the uppermost pipe pile and is pressed against the upper end surface of the annular expansion water stop (3); A pile cap is cast in the pile-pressing hole (11) at the top of the annular expansion waterstop (3).

2. A new type of pile sealing and water stopping structure for anchor static pressure piles as claimed in claim 1, characterized in that: The pile cap is made of concrete.

3. A new type of pile sealing and water stopping structure for anchor static pressure piles as claimed in claim 1, characterized in that: The space between the outer wall of the annular expansion waterstop strip (3) and the inner wall of the pile-pressing hole (11) is filled with water-stopping pile-sealing material.

4. A new type of pile sealing and water stopping structure for anchor static pressure piles as claimed in claim 1, characterized in that: The annular expansion water stop strip (3) is an annular frustum that is wide at the top and narrow at the bottom, and the side wall of the annular frustum is a curved surface.

5. A new type of pile sealing and water stopping structure for anchor static pressure piles as claimed in claim 4, characterized in that: The washer (2) is an annular steel washer that is slidably sleeved on the uppermost pipe pile, and the diameter of the washer (2) is not greater than the top surface diameter of the annular expansion waterstop (3).

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