Foundation anti-settlement pile

Abstract

The utility model discloses a foundation anti -settlement base pile, including the enlarged head of top and the cement -soil pile of downward extension, the circular platform transition section between enlarged head and cement -soil pile, and the cement -soil pile in or the enlarged head in, the circular platform transition section in and the cement -soil pile in downward extension fixed with a prefabricated reinforced concrete core pile in the circular platform transition section, constitute a whole reinforcing pile, the coaxial line of prefabricated reinforced concrete core pile and enlarged head, circular platform transition section and the cement -soil pile of downward extension, whole reinforcing pile be multiple rows, and each row has multiple, the gap of mutual between adjacent enlarged head, or the tangent of mutual between adjacent enlarged head, or the mutual occlusion between adjacent enlarged head, the gap size of mutual between adjacent enlarged head is 1mm 50mm, and the staggered arrangement of mutual between adjacent row's enlarged head. Local foundation anti -settlement base pile construction procedure is few, and construction speed is fast, and construction period is short, and construction efficiency is high, and material cost is relatively low and relatively strong bearing capacity.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation construction technology, specifically to a foundation anti-settlement pile. Background Technology

[0002] In existing technologies, the reinforcement of large-area soft soil foundations, such as soft soil subgrades for highways and high-grade roads, railway soft soil foundations, airport runway soft soil foundations, and soft soil foundations for urban construction plazas, is also known as foundation settlement prevention reinforcement. It generally employs two different types of pile structures, but each has its own shortcomings:

[0003] One type is cement-soil piles, also known as cement-soil mixing piles, or simply mixing piles. This involves using multiple cement-soil piles, 10-24 meters deep and 500mm-1000mm in diameter, spaced apart to form anti-settlement piles for soft soil foundations. However, it has significant drawbacks. If the density is too low, the settlement between the gaps will be uneven, resulting in an unsatisfactory anti-settlement reinforcement effect. If the density is too high, too many cement-soil piles are needed, leading to excessive costs and material waste.

[0004] Another type is precast pipe piles, also known as precast reinforced concrete piles. Compared to cement-soil piles, precast pipe piles have relatively higher strength and bearing capacity. However, relying solely on the high density of precast pipe piles to prevent settlement is the same as with cement-soil piles – requiring too many precast pipe piles, resulting in high costs and significant material waste. Therefore, each precast pipe pile reinforcement pile in the current technology must have a reinforced concrete pile cap, also known as a reinforced concrete foundation, at its top. Its disadvantages are also obvious: after the precast pipe pile is driven into the ground to a predetermined elevation, formwork must be installed at the top of each precast pipe pile, a reinforcing cage must be tied, and concrete must be poured. The formwork must be removed after the reinforced concrete of the pile cap reaches the predetermined strength. This process involves many steps, a long construction period, low construction efficiency, and still relatively high material costs. Utility Model Content

[0005] One of the technical problems to be solved by this utility model is to provide a foundation anti-settlement pile with fewer construction steps, faster construction speed, shorter construction period, higher construction efficiency, relatively lower material cost and relatively stronger bearing capacity.

[0006] The technical solution of this utility model is to provide a foundation anti-settlement pile.

[0007] It includes an enlarged head at the top and a cement-soil pile extending downwards, with a frustum transition section between the enlarged head and the cement-soil pile.

[0008] A precast reinforced concrete core pile is fixed within the truncated cone transition section and within the downward-extending cement-soil piles, forming a single integral foundation pile; or

[0009] A precast reinforced concrete core pile is fixed inside the enlarged head, the truncated cone transition section, and the downward-extending cement-soil pile, forming a single integral foundation pile.

[0010] With the above structure, the foundation anti-settlement pile of this utility model has the following advantages:

[0011] The most prominent advantage is that a precast reinforced concrete core pile is fixed within the truncated cone transition section and the downwardly extending cement-soil pile, or within the enlarged head and the truncated cone transition section and the downwardly extending cement-soil pile, forming a single integral foundation pile. This replaces the precast pipe pile with a reinforced concrete pile cap in the prior art, eliminating the need for the reinforced concrete pile cap on top of the precast pipe pile. Compared to the existing cement-soil mixing piles and precast pipe piles with pile caps, this new type of foundation pile can be constructed in one go using a pile driver equipped with a mixing drill bit with an enlarged head, including the enlarged head, truncated cone transition section, and cement-soil pile, followed by the sinking of the precast reinforced concrete core pile using existing construction methods. Using enlarged heads instead of reinforced concrete pile caps and employing foundation piles to replace existing cement-soil mixing piles and precast pipe piles with pile caps for foundation reinforcement, whether for single pile construction or pile slab construction, saves labor, time, and materials. It involves fewer construction procedures, faster construction speed, shorter construction period, higher construction efficiency, and relatively lower material costs. The cost of settlement prevention and reinforcement treatment for soft soil foundations is relatively low, and the piles have high strength and strong bearing capacity.

[0012] Furthermore, since the enlarged head and the cement-soil pile are connected by a frustum transition section, the compressive and shear resistance of the mixing pile with the enlarged head is further improved.

[0013] Furthermore, the precast reinforced concrete core piles are coaxial with the enlarged head, the truncated cone transition section, and the downwardly extending cement-soil piles. This structure further ensures the technical benefits of saving labor, time, and materials; fewer construction steps; faster construction speed; shorter construction period; higher construction efficiency; relatively lower material costs; relatively lower cost for soft soil foundation settlement prevention and reinforcement; and high pile strength and bearing capacity.

[0014] Furthermore, the top surface of the precast reinforced concrete core pile is flush with the top surface of the enlarged head, or the top surface of the precast reinforced concrete core pile is lower than the top surface of the enlarged head but higher than the boundary line between the enlarged head and the truncated cone transition section; or the top surface of the precast reinforced concrete core pile is flush with but lower than the boundary line between the enlarged head and the truncated cone transition section; the bottom surface of the precast reinforced concrete core pile is flush with the bottom surface of the cement-soil pile, or the bottom surface of the precast reinforced concrete core pile is higher than the bottom surface of the cement-soil pile, or the bottom surface of the precast reinforced concrete core pile is lower than the bottom surface of the cement-soil pile. Adopting the above structure makes the construction of precast reinforced concrete core piles more convenient and faster, while ensuring the aforementioned technical effects, and adapting to construction in different environments and under different conditions.

[0015] Furthermore, the connection between the enlarged head and the frustum transition section is either a line connection or a surface connection; the connection between the frustum transition section and the cement-soil pile is also either a line connection or a surface connection. Because if the connections between the plates of the mixing frame of the mixing head of the enlarged head are right-angle transitions, then the connection between the enlarged head and the frustum transition section is a line connection, and the connection between the frustum transition section and the cement-soil pile is also a line connection; if the connections between the plates are surface transitions, such as arc-shaped surface transitions or beveled transitions, then the connection between the enlarged head and the frustum transition section is a surface connection, and the connection between the frustum transition section and the cement-soil pile is also a surface connection. With the above structure, whether it's a line transition or a surface transition, it meets the quality requirements of this foundation pile and ensures the technical effects described above.

[0016] Furthermore, the overall foundation piles are arranged in multiple rows, with multiple piles in each row; adjacent enlarged heads are spaced apart, tangent to each other, or interlocked. With this structure, during the construction of the foundation piles of this utility model, depending on the actual geological conditions and engineering needs, adjacent enlarged heads can be spaced apart, tangent to each other, or interlocked, making the anti-settlement reinforcement effect on soft soil foundations more significant.

[0017] Furthermore, the gap between adjacent enlarged heads is 1mm-50mm. Using this structure, the gaps save material while still ensuring significant effectiveness in preventing settlement and reinforcing soft soil foundations.

[0018] Furthermore, the enlarged heads in adjacent rows are arranged in a staggered manner. This structure makes the horizontal arrangement of the enlarged heads more rational, further improving the effectiveness of settlement prevention and reinforcement treatment for soft soil foundations.

[0019] Furthermore, the staggered arrangement structure is as follows: the diameter line of a circle of each enlarged head in a row is perpendicular to the line connecting the centers of two adjacent enlarged heads in an adjacent row, and the diameter line of this circle bisects the line connecting the centers. With this structure, the staggered arrangement is highly rational, significantly improving the anti-settlement reinforcement effect on soft soil foundations and saving materials such as cement. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of a single pile of the foundation anti-settlement pile of this utility model. Figure 1 (The top of the precast reinforced concrete core pile is within the truncated cone transition section;) Figures 1-5 The frustum transition section is connected to the enlarged head and the cement-soil pile by a line; Figures 1-8 The lengths of the middle sections of both the cement-soil piles and the precast reinforced concrete core piles are omitted, and no length omission lines are drawn.

[0021] Figure 2 This is a cross-sectional view of a single pile of the foundation anti-settlement pile of this utility model. Figure 2 (The top of the precast reinforced concrete core pile is inside the enlarged head).

[0022] Figure 3 This is a schematic diagram of the structure of the foundation anti-settlement pile of this utility model. Figure 1 (One row of piles is shown in section; the bottom end face of the precast reinforced concrete core pile is flush with the bottom end face of the cement-soil pile).

[0023] Figure 4 This is a schematic diagram of the structure of the foundation anti-settlement pile of this utility model. Figure 2 (The bottom end face of the precast reinforced concrete core pile is flush with the bottom end face of the cement-soil pile).

[0024] Figure 5 This is a schematic diagram of the structure of the foundation anti-settlement pile of this utility model. Figure 3 (The bottom surface of the precast reinforced concrete core pile is lower than the bottom surface of the cement-soil pile).

[0025] Figure 6 This is a schematic diagram of the structure of the foundation anti-settlement piles of this utility model, showing that adjacent rows of enlarged heads are arranged in an alternating manner and that adjacent enlarged heads interlock with each other. Figures 6-8 The frustum transition section is connected to the enlarged head and the cement-soil pile via a surface connection.

[0026] Figure 7 This is a schematic diagram of the structure of the foundation anti-settlement piles of this utility model, showing that the enlarged heads of adjacent rows of piles are arranged in an alternating manner and that the adjacent enlarged heads are tangent to each other.

[0027] Figure 8 This is a schematic diagram of the structure of the foundation anti-settlement piles of this utility model, showing that adjacent rows of enlarged heads are arranged in an alternating manner with gaps between adjacent enlarged heads.

[0028] As shown in the figure:

[0029] 1. Enlarged head, 2. Frustum transition section, 3. Cement-soil pile, 4. Precast reinforced concrete core pile, 5. Diameter line, 6. Center connection line, 7. Gap, 8. Boundary line. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown.

[0032] A preferred embodiment of the foundation settlement prevention pile of this utility model includes an enlarged head 1 at the top and a downwardly extending cement-soil pile 3. A frustum-shaped transition section 2 connects the enlarged head 1 and the cement-soil pile 3. A precast reinforced concrete core pile 4 is fixed or implanted within the frustum-shaped transition section 2 and the downwardly extending cement-soil pile 3, or within the enlarged head 1, the frustum-shaped transition section 2, and the downwardly extending cement-soil pile 3, forming a single integral foundation pile. In other words,

[0033] A precast reinforced concrete core pile 4 is fixed within the truncated cone transition section 2 and the downwardly extending cement-soil pile 3, forming a single integral foundation pile; or

[0034] A precast reinforced concrete core pile 4 is fixed inside the enlarged head 1, the truncated cone transition section 2, and the downwardly extending cement-soil pile 3, forming an integral foundation pile.

[0035] That is, this includes two structures. One is that the precast reinforced concrete core pile 4 is fixed inside the frustum transition section 2 and the downwardly extending cement-soil pile 3, such that the top of the precast reinforced concrete core pile 4 is inside the frustum transition section 2, and the rest is inside the downwardly extending cement-soil pile 3. The other is that the precast reinforced concrete core pile 4 is fixed inside the enlarged head 1, inside the frustum transition section 2, and inside the downwardly extending cement-soil pile 3, such that the top of the precast reinforced concrete core pile 4 is inside the enlarged head 1, and the rest is inside the frustum transition section 2 and the downwardly extending cement-soil pile 3.

[0036] The precast reinforced concrete core pile 4 is coaxial with the enlarged head 1, the truncated cone transition section 2, and the downwardly extending cement-soil pile 3.

[0037] The top surface of the precast reinforced concrete core pile 4 can be flush with the top surface of the enlarged head 1. (See also...) Figure 2 Alternatively, the top surface of the precast reinforced concrete core pile 4 is lower than the top surface of the enlarged head 1 and higher than the boundary line 8 between the enlarged head 1 and the frustum transition section 2, that is, the top of the precast reinforced concrete core pile 4 is inside the enlarged head 1.

[0038] See Figure 1 and Figure 3 The top surface of the precast reinforced concrete core pile 4 is flush with or lower than the boundary line 8 between the enlarged head 1 and the frustum transition section 2, that is, the top of the precast reinforced concrete core pile 4 is inside the frustum transition section 2.

[0039] See Figures 1-4 The bottom end face of the precast reinforced concrete core pile 4 is flush with the bottom end face of the cement-soil pile 3.

[0040] Alternatively, the bottom surface of a precast reinforced concrete core pile may be higher than the bottom surface of a cement-soil pile.

[0041] See Figure 5 Alternatively, the bottom surface of the precast reinforced concrete core pile 4 may be lower than the bottom surface of the cement-soil pile 3. In other words, the foundation pile of this utility model also includes cases where the precast reinforced concrete core pile 4 is not entirely within the cement-soil pile 3, i.e., it is lower than the cement-soil pile 3.

[0042] The connection between the enlarged head 1 and the frustum transition section 2 is either a line connection or a surface connection; the connection between the frustum transition section 2 and the cement-soil pile 3 is either a line connection or a surface connection. For example... Figures 1-5 The diagram shows a line connection because the connections between the plates of the mixing frame of the enlarged head 1, such as the horizontal and vertical plates, and the vertical and inclined plates, are right-angle transitions. Therefore, the connection between the enlarged head 1 and the frustum transition section 2 is a line connection, and the connection between the frustum transition section 2 and the cement-soil pile 3 is also a line connection. Figures 6-8 The diagram shows a surface connection. If the connection between the plates, such as the horizontal plate and the vertical plate, or the vertical plate and the inclined plate, is a surface transition, such as an arc-shaped surface transition or an inclined edge transition, then the connection between the constructed enlarged head 1 and the frustum transition section 2 is a surface connection, and the connection between the frustum transition section 2 and the cement-soil pile 3 is also a surface connection.

[0043] The overall foundation piles consist of multiple rows, with multiple piles in each row; that is, the overall foundation piles are a series of piles. For example... Figure 8 As shown, adjacent enlarged heads 1 can have a gap 7 between them. Or as... Figure 7 As shown, adjacent enlarged heads 1 can be tangent to each other. Or as... Figure 3 , Figure 5 and Figure 6 As shown, adjacent enlarged heads 1 can interlock with each other.

[0044] The size of the gap 7 between adjacent enlarged heads 1 can be 1mm-50mm.

[0045] like Figures 6-7 As shown, the enlarged heads 1 in adjacent rows can be arranged in an alternating manner. The alternating arrangement can be such that the diameter line 5 of a circle of each enlarged head 1 in a row is perpendicular to the line 6 connecting the centers of two adjacent enlarged heads 1 in an adjacent row, and the diameter line 5 bisects the line 6 connecting the centers.

[0046] It is easy to understand that foundation piles are also called reinforcement piles. Cement-soil piles 3 are also called cement-soil mixing piles, or simply mixing piles. Precast reinforced concrete core piles 4 are also called precast reinforced concrete core piles or precast reinforced concrete pipe piles. Cluster piles are also called multi-pile piles or pile groups. The enlarged head 1 is a cement-soil enlarged head 1, and the frustum transition section 2 is a cement-soil frustum transition section 2. The frustum transition section 2 can also be called an inverted frustum transition section. The frustum transition section 2 can be a smooth frustum transition section or a stepped frustum transition section. Both types of frustum transition sections 2 can achieve the above-mentioned technical effects; of course, a smooth frustum transition section is preferred.

[0047] This utility model of foundation anti-settlement piles can be constructed using the combined bidirectional mixing device and pile driver described in the applicant's prior utility model patent application (application number 202521828359.8, entitled "Combined Bidirectional Mixing Device for Constructing Mixing Piles with Enlarged Heads"). Alternatively, it can be constructed using the construction method and pile driver described in Xiamen Xing Technology (Zhejiang) Co., Ltd.'s invention patent application (application number 202511202906.6, entitled "Construction Method and Pile Driver for Mixing Piles with Enlarged Heads"). That is, first, the enlarged head 1, the frustum transition section 2, and the cement-soil pile 3 are constructed in one go using the aforementioned pile driver and construction method; then, precast reinforced concrete core piles 4 are driven using existing pile drivers or vibratory hammers.

[0048] Components, structures, or quantities not marked above are not shown in the drawings, and some components are not marked in the drawings. The drawings are for illustrative purposes only. In case of any inconsistency between the drawings and the text description, or between the drawings themselves, the text description shall prevail.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A foundation anti-settlement pile, comprising an enlarged head at the top and a downwardly extending cement-soil pile, wherein the enlarged head and the cement-soil pile form a frustum transition section; characterized in that: A precast reinforced concrete core pile is fixed within the truncated cone transition section and within the downward-extending cement-soil piles, forming a single integral foundation pile; or A precast reinforced concrete core pile is fixed inside the enlarged head, the truncated cone transition section, and the downward-extending cement-soil pile, forming a single foundation pile. The top surface of the precast reinforced concrete core pile is lower than the top surface of the enlarged head and higher than the boundary line between the enlarged head and the truncated cone transition section; or the top surface of the precast reinforced concrete core pile is flush with or lower than the boundary line between the enlarged head and the truncated cone transition section; the bottom surface of the precast reinforced concrete core pile is flush with the bottom surface of the cement-soil pile, or the bottom surface of the precast reinforced concrete core pile is lower than the bottom surface of the cement-soil pile.

2. The foundation anti-settlement pile according to claim 1, characterized in that: The precast reinforced concrete core pile is coaxial with the enlarged head, the truncated cone transition section, and the downward-extending cement-soil pile.

3. The foundation anti-settlement pile according to claim 1, characterized in that: The connection between the enlarged head and the frustum transition section is either a line connection or a surface connection; the connection between the frustum transition section and the cement-soil pile is either a line connection or a surface connection.

4. The foundation anti-settlement pile according to claim 1, characterized in that: The overall foundation piles consist of multiple rows, with multiple piles in each row; adjacent enlarged heads are spaced apart, or adjacent enlarged heads are tangent to each other, or adjacent enlarged heads interlock.

5. The foundation anti-settlement pile according to claim 4, characterized in that: The gap between adjacent enlarged heads is 1mm-50mm.

6. The foundation anti-settlement pile according to claim 1, characterized in that: The enlarged heads of adjacent rows are arranged alternately.

7. The foundation anti-settlement pile according to claim 6, characterized in that: The staggered arrangement structure is as follows: the diameter line of a circle of each enlarged head in a row is perpendicular to the line connecting the centers of two adjacent enlarged heads in the adjacent row, and the diameter line of this circle bisects the line connecting the centers.

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