Cement fly-ash gravel (CFG) pile shallow-layer broken pile splicing structure

Abstract

The utility model relates to a CFG pile shallow layer broken pile splicing structure which comprises a first single-wall pipe, the first single-wall pipe is coaxially arranged on the peripheral side of the top of a broken pile in a sleeved mode, the inner diameter of the first single-wall pipe is larger than the outer diameter of the broken pile, and the difference value between the inner diameter of the first single-wall pipe and the outer diameter of the broken pile ranges from 100 mm to 300 mm. According to the CFG pile shallow-layer broken pile splicing structure, the first single-wall pipe is adopted, the first single-wall pipe is coaxially arranged on the peripheral side of the top of the broken pile in a sleeving mode, it is guaranteed that pile splicing pouring concrete of the CFG pile does not collapse through supporting of the first single-wall pipe, and the CGF pile can be smoothly spliced to the designed pile top elevation.

Description

Technical Field

[0001] This utility model relates to the technical field of building construction, specifically to a shallow broken pile splicing structure for CFG piles. Background Technology

[0002] In soft soil foundation construction, soft soil treatment is necessary to ensure the soil has the bearing capacity required by design and specifications. Common methods include replacement, cement mixing piles, CFG piles, and plastic drainage boards. The quality of soft soil foundation treatment determines the overall construction quality of the project. If the bearing capacity of the foundation does not meet the requirements after treatment, uneven settlement and collapse of buildings may occur, resulting in serious consequences and economic losses.

[0003] Using CFG piles for soft soil foundation improvement can effectively increase the bearing capacity of soft soil foundations through soil compression between piles and the bearing capacity of the piles themselves. However, when constructing CFG piles in crushed stone replacement layers and in areas treated with cement-soil mixing piles, varying degrees of shallow pile breakage may occur, resulting in the pile tops not reaching the design elevation, which seriously affects the quality of the project.

[0004] Shallow CFG pile fractures mainly fall into two categories: shallow fractures during excavation and shallow fractures during the excavation of the soil between piles. Due to high compaction, excavation is difficult, and when the excavator encounters the CFG pile, shallow fractures occur. These fractures typically occur within 500mm of the design pile top elevation. In this case, a single-section splicing device can be used. Additionally, because graded crushed stone is used for backfilling before CFG pile construction, the protective pile length at the pile top is only 500mm. After CFG pile construction, the piling machinery and excavation machinery move back and forth over the CFG pile top, causing pile fractures that are not visible to the naked eye. Pile integrity testing equipment is required for detection. In this case, shallow fractures typically occur within 1000mm of the design pile top elevation.

[0005] The existing method of splicing broken piles generally uses steel and wooden formwork for concrete pouring. However, this construction method can easily increase construction costs, take up a long construction time, and make it difficult to reinforce the formwork during the foundation construction stage. Utility Model Content

[0006] In order to solve one or more technical problems existing in the prior art, this utility model provides a shallow broken pile splicing structure for CFG piles.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A CFG pile shallow broken pile splicing structure includes a first single-walled tube, which is coaxially sleeved on the outer periphery of the top of the broken pile. The inner diameter of the first single-walled tube is larger than the outer diameter of the broken pile, and the difference between the inner diameter of the first single-walled tube and the outer diameter of the broken pile is 100mm to 300mm.

[0008] The beneficial effects of this utility model are: the shallow broken pile splicing structure of the CFG pile of this utility model adopts a first single-walled pipe, which is coaxially sleeved on the outer periphery of the top of the broken pile. Through the support of the first single-walled pipe, it is ensured that the concrete for splicing the CFG pile will not collapse, so that the CFG pile can be successfully spliced ​​to the designed pile top elevation.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the difference between the inner diameter of the first single-walled pipe and the outer diameter of the broken pile is 200mm.

[0011] Furthermore, the first single-walled tube is a single-walled corrugated tube, the inner surface of the first single-walled tube is a smooth curved surface, and the outer surface of the first single-walled tube is provided with a multi-ring corrugated structure.

[0012] The advantages of adopting the above-mentioned further scheme are: using single-wall corrugated pipes results in high structural strength and facilitates demolding after concrete pouring.

[0013] Furthermore, the wall thickness of the first single-wall tube is 25mm, and a layer of release agent is provided on the inner wall of the first single-wall tube.

[0014] Furthermore, the lower end of the first single-walled pipe is connected to the soil foundation surrounding the broken pile, and the distance between the soil foundation and the top of the broken pile is 200mm.

[0015] The beneficial effect of adopting the above-mentioned further solution is that it enables a stable connection between the cast concrete pile and the broken pile.

[0016] Furthermore, it also includes a second single-walled tube, the lower end of which is detachably connected to the upper end of the first single-walled tube.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that by setting a second single-walled pipe, it is possible to achieve high structural stability for shallow broken piles within a depth range of 1000mm from the designed pile top elevation.

[0018] Furthermore, the inner diameter of the second single-walled tube is the same as that of the first single-walled tube, and a layer of release agent is provided on the inner wall of the second single-walled tube.

[0019] Furthermore, the top of the first single-walled tube is provided with a socket joint, the inner diameter of which is larger than the inner diameter of the first single-walled tube, and the lower end of the second single-walled tube is inserted into the socket joint.

[0020] The beneficial effect of adopting the above-mentioned further solution is that by setting a socket joint, the first single-walled tube and the second single-walled tube can be stably plugged and fixed.

[0021] Furthermore, the inner diameter of the socket joint is larger than the inner diameter of the first single-walled pipe, and the difference between the inner diameter of the socket joint and the inner diameter of the first single-walled pipe is twice the wall thickness of the second single-walled pipe.

[0022] The beneficial effect of adopting the above-mentioned further solution is that by limiting the inner diameter of the socket joint, the first single-walled pipe and the second single-walled pipe can be tightly connected.

[0023] Furthermore, a clamping buckle is provided on the outer wall of the socket joint.

[0024] The beneficial effect of adopting the above-mentioned further solution is that by setting clamping buckles, the socket joint can be clamped and fixed, so that the first single-wall pipe and the second single-wall pipe can be stably inserted and fixed. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of Embodiment 1 of the present invention;

[0026] Figure 2 This is a top view of Embodiment 1 of the present invention.

[0027] Figure 3 This is a cross-sectional view of Embodiment 2 of the present invention;

[0028] Figure 4 This is a top view of Embodiment 2 of the present invention.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. First single-walled pipe; 2. Broken pile; 3. Soil foundation; 4. Second single-walled pipe; 5. Socket joint; 6. Clamping clip. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown in the figure, a shallow broken pile splicing structure of CFG pile in this embodiment includes a first single-walled pipe 1, which is coaxially sleeved on the outer periphery of the top of the broken pile 2. The inner diameter of the first single-walled pipe 1 is larger than the outer diameter of the broken pile 2, and the difference between the inner diameter of the first single-walled pipe 1 and the outer diameter of the broken pile 2 is 100mm to 300mm.

[0034] Specifically, the difference between the inner diameter of the first single-walled pipe 1 and the outer diameter of the broken pile 2 is 200mm.

[0035] Preferably, the first single-walled pipe 1 is a single-walled corrugated pipe, the inner surface of the first single-walled pipe 1 is a smooth curved surface, and the outer surface of the first single-walled pipe 1 is provided with a multi-ring corrugated structure. Using a single-walled corrugated pipe provides high structural strength and facilitates demolding after concrete pouring.

[0036] Specifically, the wall thickness of the first single-walled tube 1 is 25mm, and a layer of release agent is provided on the inner wall of the first single-walled tube 1.

[0037] like Figure 1 As shown, in this embodiment, the lower end of the first single-walled pipe 1 is connected to the soil foundation 3 surrounding the broken pile 2, and the distance between the soil foundation 3 and the top of the broken pile 2 is 200mm. This allows for a stable connection between the cast concrete pile and the broken pile.

[0038] This embodiment of the CFG pile shallow broken pile splicing structure is mainly for shallow broken CFG piles with a depth not exceeding 500mm, where a first single-walled pipe can be used for splicing. The specific construction steps are as follows: Remove excess graded gravel or soil at the broken CFG pile location, ensuring the removed ground level is 200mm lower than the broken pile surface. Apply a release agent to the inner wall of the first single-walled pipe. Clean the broken pile, mark the pile centerline, align the first single-walled pipe (500mm long, 25mm thick) with the centerline, ensuring the CFG pile centerline and the first single-walled pipe centerline coincide. Mark the pile top elevation, pour concrete, and symmetrically and evenly backfill the surrounding soil. After the concrete has initially set, remove the first single-walled pipe and proceed with the splicing of the next broken pile.

[0039] In this embodiment of the CFG pile shallow broken pile splicing structure, a first single-walled pipe is used, which is coaxially sleeved on the outer periphery of the top of the broken pile. Through the support of the first single-walled pipe, it is ensured that the concrete for splicing the CFG pile will not collapse, so that the CFG pile can be successfully spliced ​​to the designed pile top elevation.

[0040] Example 2

[0041] like Figure 3 and Figure 4 As shown, based on Embodiment 1, the CFG pile shallow broken pile splicing structure of this embodiment further includes a second single-walled pipe 4, the lower end of which is detachably connected to the upper end of the first single-walled pipe 1. By setting the second single-walled pipe, it is possible to address shallow broken piles within a depth range of 1000mm from the designed pile top elevation, resulting in high structural stability.

[0042] like Figure 3 As shown, in this embodiment, the inner diameter of the second single-wall tube 4 is the same as the inner diameter of the first single-wall tube 1, and a layer of release agent is provided on the inner wall of the second single-wall tube 4.

[0043] like Figure 3 and Figure 4As shown, in this embodiment, the top of the first single-walled tube 1 is provided with a socket joint 5. The inner diameter of the socket joint 5 is larger than the inner diameter of the first single-walled tube 1, and the lower end of the second single-walled tube 4 is inserted into the socket joint 5. By providing the socket joint, the first single-walled tube and the second single-walled tube can be stably inserted and fixed.

[0044] like Figure 3 As shown, in this embodiment, the inner diameter of the socket joint 5 is larger than the inner diameter of the first single-walled pipe 1, and the difference between the inner diameters of the socket joint 5 and the first single-walled pipe 1 is twice the wall thickness of the second single-walled pipe 4. By limiting the inner diameter of the socket joint, the first single-walled pipe and the second single-walled pipe can be tightly connected.

[0045] Specifically, the axial length of the socket joint 5 can be selected from 15 to 25 cm, preferably 20 cm.

[0046] like Figure 3 and Figure 4 As shown, the outer wall of the socket joint 5 in this embodiment is provided with a clamping buckle 6. By setting the clamping buckle, the socket joint can be clamped and fixed, so that the first single-wall pipe and the second single-wall pipe can be stably inserted and fixed.

[0047] This embodiment of the CFG pile shallow break-in splicing structure is mainly for situations where the depth of a shallow CFG pile break is greater than 500mm, and the first single-wall pipe is insufficient to reach the pile top elevation. In such cases, both the first and second single-wall pipes must be used simultaneously for splicing. The specific construction steps are as follows: remove excess graded gravel or soil at the CFG pile break location, ensuring that the cleared ground is 200mm lower than the CFG pile break surface; and apply a release agent to the inner walls of both the first and second single-wall pipes. Clean the broken pile, mark the pile centerline, align it with the pile centerline, and install the first single-wall pipe, 500mm long and 25mm thick. Check whether the centerline of the CFG pile and the centerline of the first single-wall pipe coincide. Adjust and ensure that the centerline of the CFG pile and the centerline of the first single-wall pipe coincide. Install the second single-wall pipe, and install two clamps on the outer wall of the socket joint. After installation, check again whether the centerlines of the second single-wall pipe and the first single-wall pipe coincide with the centerline of the CFG pile. Mark the pile top elevation, pour concrete, and after the concrete has initially set, pull out the first and second single-wall pipes to carry out the next broken pile splicing construction. Backfill the surrounding soil symmetrically and evenly.

[0048] In this embodiment, the shallow broken pile splicing structure of CFG piles adopts a first single-walled pipe and a second single-walled pipe. The first single-walled pipe is coaxially sleeved on the outer periphery of the top of the broken pile, and the second single-walled pipe is inserted and fixed on the first single-walled pipe. Through the support of the first single-walled pipe and the second single-walled pipe, it is ensured that the concrete pouring for splicing the CFG pile will not collapse, so that the CFG pile can be successfully spliced ​​to the designed pile top elevation.

[0049] This utility model's shallow CFG pile splicing structure is simple to process and easy to operate. It not only quickly solves the difficulties of shallow CFG pile splicing but also ensures the molding effect of CFG pile concrete, reduces repair costs, improves appearance quality, and can be used repeatedly after a single investment, demonstrating strong application capabilities. Furthermore, it occupies a short construction period, significantly shortening the CFG pile foundation splicing construction cycle.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A shallow broken pile splicing structure for CFG piles, characterized in that, It includes a first single-walled tube and a second single-walled tube. The first single-walled tube is coaxially sleeved on the outer periphery of the top of the broken pile. The inner diameter of the first single-walled tube is larger than the outer diameter of the broken pile, and the difference between the inner diameter of the first single-walled tube and the outer diameter of the broken pile is 100mm~300mm. The lower end of the second single-walled tube is detachably connected to the upper end of the first single-walled tube; the inner diameter of the second single-walled tube is the same as that of the first single-walled tube, and a layer of release agent is provided on the inner sidewall of the second single-walled tube; a socket joint is provided at the top of the first single-walled tube, the inner diameter of the socket joint is larger than that of the first single-walled tube, and the lower end of the second single-walled tube is inserted into the socket joint; the inner diameter of the socket joint is larger than that of the first single-walled tube, and the difference between the inner diameter of the socket joint and the inner diameter of the first single-walled tube is twice the wall thickness of the second single-walled tube; a clamp is provided on the outer sidewall of the socket joint.

2. The CFG pile shallow broken pile splicing structure according to claim 1, characterized in that, The difference between the inner diameter of the first single-walled pipe and the outer diameter of the broken pile is 200mm.

3. The CFG pile shallow broken pile splicing structure according to claim 1, characterized in that, The first single-walled tube is a single-walled corrugated tube. The inner surface of the first single-walled tube is a smooth curved surface, and the outer surface of the first single-walled tube is provided with a multi-ring corrugated structure.

4. The CFG pile shallow broken pile splicing structure according to claim 1, characterized in that, The first single-walled tube has a wall thickness of 25mm, and a layer of release agent is provided on the inner wall of the first single-walled tube.

5. The CFG pile shallow broken pile splicing structure according to claim 1, characterized in that, The lower end of the first single-walled pipe is connected to the soil foundation surrounding the broken pile, and the distance between the soil foundation and the top of the broken pile is 200mm.

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