Basement anti-floating pile based on pipe well recycling

Abstract

The utility model discloses a basement anti -floating pile based on pipe well recycling belongs to underground foundation pit technical field, including pipe well structure and pile body. The pipe well structure includes the well pipe that extends along the vertical, grouting filter material pipe layer and water stop ring, the well pipe coaxial setting is in grouting filter material pipe layer, and the top of well pipe is located in the reserved groove on basement bottom plate, and the outer wall surface of well pipe corresponds the reserved groove and is coaxially provided with water stop ring, and the top of grouting filter material pipe layer is set below the bottom plate. The pile body includes concrete filling layer and reinforcement cage, and the reinforcement cage is set inside the well pipe along the vertical, and the concrete filling layer is set in the well pipe and the reserved groove. The utility model provides a basement anti -floating pile based on pipe well recycling can realize the recycling of abandoned pipe well, not only can inhibit or reduce the basement structure and float or damage, can also solve the problem of the basement bottom plate groundwater leakage at pipe well, reduces the engineering cost while ensuring the building quality of basement.

Description

Technical Field

[0001] This utility model belongs to the field of underground foundation pit technology, specifically relating to a basement anti-buoyancy pile based on the reuse of manholes. Background Technology

[0002] Dewatering via manholes is a common method for lowering the groundwater level during foundation pit construction. Manholes can be placed inside or outside the foundation pit. After the basement soil is backfilled and the anti-buoyancy requirements are met, the manholes are cut off from the bottom slab and abandoned.

[0003] During use, the rise in groundwater level often causes the basement floor to float, which can lead to structural damage. Therefore, a certain number of anti-floating piles or anti-floating anchors are usually installed under the basement floor to suppress or reduce the floating or damage to the basement structure.

[0004] In related technologies, anti-buoyancy piles for basements are usually driven into the ground before basement construction, and then the basement is poured. The pipe shaft is cut off from the bottom slab and abandoned, resulting in some waste. Moreover, the connection between the pipe shaft and the basement bottom slab is often a weak point in the waterproofing of the basement bottom slab, resulting in some waste and affecting the quality of basement waterproofing. Utility Model Content

[0005] In response to one or more of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a basement anti-buoyancy pile based on the reuse of manholes. It can realize the reuse of abandoned manholes, which can not only suppress or reduce the floating or damage of the basement structure, but also solve the problem of groundwater leakage at the manhole location, thus reducing engineering costs while ensuring the construction quality of the basement.

[0006] To achieve the above objectives, this utility model provides a basement anti-buoyancy pile based on well reuse, used for anti-buoyancy of basements in foundation pit soil, comprising: A well structure comprising a well pipe extending vertically, a grouting filter material layer, and at least one water-stopping ring; The well pipe is coaxially arranged in the grouting filter material pipe layer, and the top of the well pipe is located in the reserved groove on the basement floor slab. Several water-stop rings are coaxially sleeved on the outer wall of the well pipe corresponding to the reserved groove to prevent groundwater from flowing into the basement from the outside of the well pipe. The top of the grouting filter material pipe layer is located below the floor slab. The pile body includes a concrete filling layer and a vertically extending steel cage. The steel cage is vertically arranged inside the well pipe, and the concrete filling layer is arranged in the well pipe and the reserved groove to form an anti-buoyancy pile structure connecting the base plate.

[0007] As a further preferred embodiment of this utility model, the grouting filter material pipe layer includes a filter material layer and a grouting cement slurry filling layer; The filter media layer is coaxially disposed on the outer wall surface of the well pipe, and gaps are provided in the filter media layer; The grouting cement slurry filling layer fills the gaps in the filter material layer to enhance the strength of the well structure.

[0008] As a further preferred embodiment of the present invention, at least one grouting pipe is provided in the filter material layer, the grouting pipe extends vertically, and a plurality of grouting holes are provided at vertical intervals on the grouting pipe.

[0009] As a further preferred embodiment of this utility model, the bottom outer wall surface of the well pipe is provided with several through holes.

[0010] As a further preferred embodiment of this utility model, the steel cage includes several main bars and several transverse bars; Each of the main reinforcing bars extends vertically and is evenly arranged inside the well pipe; each of the transverse reinforcing bars is spaced vertically and is fixedly connected to each of the main reinforcing bars.

[0011] As a further preferred embodiment of this utility model, the reinforcing cage includes several main bars and spiral bars; Each of the main reinforcing bars extends vertically and is evenly arranged inside the well pipe; the spiral reinforcing bar extends vertically and is fixedly connected to each of the main reinforcing bars.

[0012] As a further preferred embodiment of this utility model, the main reinforcement is made of HRB400 grade steel bars, and the spiral reinforcement is made of HPB300 grade steel bars.

[0013] As a further preferred embodiment of this utility model, the top of the main reinforcement bar is provided with a horizontal reinforcement bar segment, and all the horizontal reinforcement bar segments are located in the reserved groove.

[0014] As a further preferred embodiment of this invention, the concrete filling layer is prepared using micro-expansion concrete.

[0015] As a further preferred embodiment of the present invention, the pile body further includes a steel mesh, which is disposed on the top of the concrete filling layer and is fixedly connected to the steel reinforcement structure in the base plate.

[0016] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include: (1) The basement anti-buoyancy pile based on the reuse of manholes of this utility model includes a manhole structure and a pile body. The manhole structure includes a manhole pipe extending vertically, a grouting filter material pipe layer, and at least one water-stop ring; the manhole pipe is coaxially arranged in the grouting filter material pipe layer, and the top of the manhole pipe is located in a reserved groove on the basement floor slab. Several water-stop rings are coaxially fitted on the outer wall of the manhole pipe corresponding to the reserved groove to prevent groundwater from flowing into the basement from the outside of the manhole pipe; the top of the grouting filter material pipe layer is located below the floor slab. The pile body includes a concrete filling layer and a vertically extending steel cage. The steel cage is vertically arranged inside the manhole pipe, and the concrete filling layer is arranged in the manhole pipe and the reserved groove to form an anti-buoyancy pile structure connecting the floor slab. This basement anti-buoyancy pile can realize the reuse of abandoned manholes, which can not only suppress or reduce the floating or damage of the basement structure, but also solve the problem of groundwater leakage at the manhole location, reducing engineering costs while ensuring the construction quality of the basement.

[0017] (2) The basement anti-buoyancy pile based on the reuse of the well pipe of this utility model has good anti-buoyancy performance, convenient construction, and low cost. It uses the well pipe formed after the foundation pit construction and the grouting filter material pipe layer set around the well pipe to serve as part of the anti-buoyancy pile structure, thereby reducing the use of some materials and some procedures of the anti-buoyancy pile. Combined with the pile body including a concrete filling layer and a steel cage set in the well pipe, it can not only ensure the stability of the anti-buoyancy pile structure, but also further improve the structural strength of the anti-buoyancy pile by means of the micro-expansion concrete used in the concrete filling layer. At the same time, through the use of several vertically extending main bars and vertically extending spiral bars in the steel cage, a uniformly distributed steel skeleton structure is formed in the well pipe. In addition, the horizontal steel bar segment set on the top of the main bars significantly improves the stable connection between the anti-buoyancy pile and the bottom slab. Furthermore, by setting at least one water-stop ring between the well pipe and the concrete filling layer, the problem of groundwater leakage at the basement bottom slab at the well pipe is solved. While reducing the project cost, it ensures the construction quality of the basement and has good promotion value and application prospects. Attached Figure Description

[0018] Figure 1 This is a vertical cross-sectional view of the basement anti-buoyancy pile based on the reuse of the manhole in this embodiment of the present invention; Figure 2 This is a vertical cross-sectional view of the top area of ​​the anti-buoyancy pile for basement based on the reuse of manholes in this embodiment of the present invention.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Grouting filter material pipe layer; 2. Well pipe; 3. Reinforcing cage; 4. Water-stop ring; 5. Reinforcing mesh; 6. Concrete filling layer; 7. Reserved groove; 8. Base plate; 9. Grouting pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] Example: Please see Figure 1 , 2 The basement anti-buoyancy pile based on the reuse of manholes in the preferred embodiment of this utility model can realize the reuse of abandoned manholes, which can not only suppress or reduce the floating or damage of the basement structure, but also solve the problem of groundwater leakage at the basement floor slab 8 at the manhole, thus reducing engineering costs while ensuring the construction quality of the basement.

[0026] Specifically, such as Figure 1 and Figure 2 As shown in the preferred embodiment of this application, the basement anti-buoyancy pile based on the reuse of the manhole is installed on the basement floor slab 8 to achieve anti-buoyancy of the basement in the foundation pit. The basement anti-buoyancy pile includes a manhole structure and a pile body.

[0027] The anti-buoyancy pile for the basement includes a vertically extending well pipe 2, a grouting filter material pipe layer 1, and at least one water-stop ring 4. The well pipe 2 is coaxially arranged in the grouting filter material pipe layer 1, and the top of the well pipe 2 is located in a reserved groove 7 on the basement floor slab 8, so that several water-stop rings 4 can be coaxially fitted on the outer wall of the well pipe 2 corresponding to the reserved groove 7 to prevent groundwater from flowing into the basement from the outside of the well pipe 2. At the same time, the top of the grouting filter material pipe layer 1 is located below the floor slab 8, thereby improving the structural strength of the well pipe 2.

[0028] Furthermore, the pile body includes a concrete filling layer 6 and a vertically extending steel cage 3, which is vertically arranged inside the well pipe 2, while the concrete filling layer 6 is arranged in the well pipe 2 and the reserved groove 7, so as to connect the steel cage 3, the well pipe 2 and the basement floor 8 into one, thereby forming an anti-buoyancy pile structure connecting the floor 8.

[0029] It is worth noting that in the preferred embodiment of this application, the direction perpendicular to or plumb to the horizontal plane is vertical, the length direction of the basement floor slab 8 is longitudinal, the width direction of the basement floor slab 8 is transverse, the longitudinal direction is perpendicular to the transverse direction, and the vertical direction is perpendicular to both the longitudinal and transverse directions.

[0030] Furthermore, in a preferred embodiment of this application, the well pipe 2 is provided with several through holes in the area below the water level line, so that groundwater can be extracted from the well pipe 2 through the through holes during the foundation pit construction process.

[0031] Furthermore, in a preferred embodiment of this application, the grouting filter pipe layer 1 includes a filter layer and a grouting cement slurry filling layer. The filter layer is coaxially disposed on the outer wall surface of the well pipe 2, and gaps are provided within the filter layer to facilitate the filtration of groundwater flowing into the well pipe 2 during the foundation pit construction process. Preferably, a filter layer is provided covering the outer wall surface below the bottom plate 8 of the well pipe 2.

[0032] Furthermore, the grout filling layer fills the gaps within the filter layer. After the grout filling layer hardens, it significantly enhances the structural strength of the well structure, thereby ensuring the strength of the anti-buoyancy pile.

[0033] More preferably, in a preferred embodiment of this application, at least one grouting pipe 9 is provided in the filter material layer. The grouting pipe 9 extends vertically. Preferably, the grouting pipes 9 are arranged in a uniform circumferential pattern within the well pipe 2 to ensure that the grouting pipes 9 can inject cement slurry into the filter material layer. More preferably, the grouting pipes 9 within the well pipe 2 are arranged in a multi-layered, coaxial ring to further improve the uniformity of grouting in the filter material layer.

[0034] More specifically, in the preferred embodiment of this application, a plurality of grouting holes are provided vertically spaced on the grouting pipe 9 so that cement slurry can be fully injected into the entire filter layer through the plurality of grouting holes spaced vertically.

[0035] Furthermore, in a preferred embodiment of this application, the reinforcing cage 3 includes several main reinforcing bars and several transverse reinforcing bars. Each main reinforcing bar extends vertically and is evenly arranged within the well pipe 2. Each transverse reinforcing bar is spaced vertically and is fixedly connected to the main reinforcing bars, thereby forming a reinforcing cage 3 structure that fills the inner cavity of the well pipe 2, thereby improving the structural strength of the entire pile. Preferably, the bottom end of the main reinforcing bar is located at the bottom of the well pipe 2, and the top of the main reinforcing bar extends out of the top surface of the well pipe 2 and is located in the reserved groove 7.

[0036] Of course, the reinforcing cage 3 is not limited to the above-described structural form. In another preferred embodiment of this application, the reinforcing cage 3 includes several main bars and spiral bars. Each main bar extends vertically and is evenly arranged in the well. The spiral bars also extend vertically and are fixedly connected to each main bar, thereby forming a reinforcing cage 3 structure that fills the inner cavity of the well pipe 2, thereby improving the structural strength of the entire pile. Preferably, the bottom end of the main bar is located at the bottom of the well pipe 2, and the top of the main bar extends out of the top surface of the well pipe 2 and is located in the reserved groove 7.

[0037] More preferably, the vertical length of the spiral reinforcement is the same as that of the main reinforcement. Specifically, the bottom end of the spiral reinforcement is located at the bottom of the well pipe 2, and the top of the main reinforcement extends out of the top surface of the well pipe 2 and is located in the reserved groove 7.

[0038] More specifically, in the preferred embodiment of this application, the main reinforcement is made of HRB400 grade steel bars, and the spiral reinforcement is made of HPB300 grade steel bars.

[0039] Furthermore, in a preferred embodiment of this application, a horizontal steel bar segment is provided at the top of the main reinforcement bar, and all the horizontal steel bar segments are located in the reserved groove 7, thereby improving the connection strength between the main reinforcement bar and the bottom plate 8.

[0040] More preferably, in the preferred embodiment of this application, the concrete filling layer 6 is prepared using micro-expansion concrete, so that after the concrete filling layer 6 solidifies, it can expand and fill the space inside the entire well pipe 2, thereby further improving the structural strength of the anti-buoyancy pile.

[0041] More specifically, in the preferred embodiment of this application, the pile body further includes a steel mesh 5, which is disposed on top of the concrete filling layer 6 and is fixedly connected to the steel reinforcement structure in the base slab 8, further enhancing the connection strength between the anti-buoyancy pile and the basement base slab 8.

[0042] This utility model presents a basement anti-buoyancy pile based on the reuse of a manhole. It offers good anti-buoyancy performance, convenient construction, and low cost. The pile utilizes a manhole pipe 2 formed after the foundation pit construction, along with a grouting filter material layer 1 surrounding the manhole pipe 2, as part of the anti-buoyancy pile structure. This reduces the use of some materials and the number of construction steps. Combined with a pile body including a concrete filling layer 6 and a reinforcing cage 3 within the manhole pipe 2, the stability of the anti-buoyancy pile structure is ensured, and the micro-expansion concrete used in the concrete filling layer 6 further enhances the structural strength of the anti-buoyancy pile. Simultaneously, the reinforcing cage 3, with its vertically extending main bars and spiral bars, forms a uniformly distributed reinforcing steel skeleton structure within the manhole pipe 2. The horizontal reinforcing steel segment placed at the top of the main bars significantly improves the stable connection between the anti-buoyancy pile and the base slab 8. Furthermore, at least one water-stop ring 4 placed between the manhole pipe 2 and the concrete filling layer 6 solves the problem of groundwater leakage at the basement base slab 8 at the manhole location. This approach reduces construction costs while ensuring the quality of the basement construction, demonstrating significant potential for widespread application.

[0043] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A basement anti-buoyancy pile based on well reuse, used for anti-buoyancy of basements in foundation pit soil, characterized in that, include: A well structure comprising a well pipe extending vertically, a grouting filter material layer, and at least one water-stopping ring; The well pipe is coaxially arranged in the grouting filter material pipe layer, and the top of the well pipe is located in the reserved groove on the basement floor slab. Several water-stop rings are coaxially sleeved on the outer wall of the well pipe corresponding to the reserved groove to prevent groundwater from flowing into the basement from the outside of the well pipe. The top of the grouting filter material pipe layer is located below the floor slab. The pile body includes a concrete filling layer and a vertically extending steel cage. The steel cage is vertically arranged inside the well pipe, and the concrete filling layer is arranged in the well pipe and the reserved groove to form an anti-buoyancy pile structure connecting the base plate.

2. The basement anti-buoyancy pile based on well reuse according to claim 1, characterized in that, The grouting filter material pipe layer includes a filter material layer and a grouting cement slurry filling layer; The filter media layer is coaxially disposed on the outer wall surface of the well pipe, and gaps are provided in the filter media layer; The grouting cement slurry filling layer fills the gaps in the filter material layer to enhance the strength of the well structure.

3. The basement anti-buoyancy pile based on well reuse according to claim 2, characterized in that, At least one grouting pipe is provided in the filter media layer. The grouting pipe extends vertically and has a number of grouting holes spaced vertically on it.

4. The basement anti-buoyancy pile based on well reuse according to any one of claims 1 to 3, characterized in that, Several through holes are provided on the bottom outer wall surface of the well pipe.

5. The basement anti-buoyancy pile based on well reuse according to any one of claims 1 to 3, characterized in that, The steel cage includes several main bars and several transverse bars; Each of the main reinforcing bars extends vertically and is evenly arranged inside the well pipe; each of the transverse reinforcing bars is spaced vertically and is fixedly connected to each of the main reinforcing bars.

6. The basement anti-buoyancy pile based on well reuse according to any one of claims 1 to 3, characterized in that, The reinforcing cage consists of several main bars and spiral bars; Each of the main reinforcing bars extends vertically and is evenly arranged inside the well pipe; the spiral reinforcing bar extends vertically and is fixedly connected to each of the main reinforcing bars.

7. The basement anti-buoyancy pile based on well reuse according to claim 6, characterized in that, The main reinforcement bars are made of HRB400 grade steel bars, and the spiral reinforcement bars are made of HPB300 grade steel bars.

8. The basement anti-buoyancy pile based on well reuse according to claim 6, characterized in that, The top of the main reinforcement bar is provided with a horizontal steel bar segment, and the horizontal steel bar segment is located in the reserved groove.

9. The basement anti-buoyancy pile based on well reuse according to any one of claims 1 to 3, 7, and 8, characterized in that, The concrete filling layer is prepared using micro-expansion concrete.

10. The basement anti-buoyancy pile based on well reuse according to any one of claims 1 to 3, 7, and 8, characterized in that, The pile body also includes a steel mesh, which is disposed on top of the concrete filling layer and is fixedly connected to the steel reinforcement structure in the base plate.

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