Stiff composite pile
By setting cylindrical concave holes and arc-shaped outer cores on the outside of rigid piles, the bonding force between concrete and flexible pile cement and soil in rigid composite piles is enhanced, solving the problem of insufficient adhesion performance of traditional rigid composite piles and improving bearing capacity and service life.
Patent Information
- Application Number
- CN202422241956.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-09-12
AI Technical Summary
Traditional reinforced composite piles have insufficient adhesion between the core pile and the cement-soil mixture, resulting in insufficient bearing capacity and easy brittle failure, thus shortening their service life.
Cylindrical recesses are added to the outside of rigid piles to enhance the bond strength between concrete and flexible pile cement-soil interface. The compaction effect is enhanced by setting an arc-shaped outer core, and the recesses are used to fill the flexible pile cement-soil to improve the interfacial bond strength.
It enhances the bearing capacity and service life of rigid composite piles, and improves the overall bearing capacity by increasing the bond strength between rigid and flexible piles.
Smart Images
Figure CN223688905U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a geotechnical engineering technical field, concretely relates to a kind of stiff composite pile. BACKGROUND
[0002] Stiff composite pile is a kind of composite carrier, that is, first using deep mixing, high-pressure rotary jet, drilling grouting or powder injection process to form cement-soil mixing pile, then implanting rigid pile in flexible pile body, to form the composite pile type with higher strength. This pile type not only inherits the characteristics of strong side friction of flexible pile, but also combines the advantages of high strength of rigid pile body, and has been widely used in building engineering in soft soil area.
[0003] In engineering practice, due to the smooth surface of the traditional core pile, there is lack of enough roughness or occlusion structure, which limits the adhesion between the core pile and the surrounding cement soil. This design deficiency makes the contact surface between the core pile and the cement soil prone to brittle failure when bearing external load, thereby weakening the overall bearing capacity of the pile body and shortening the service life of the stiff composite pile. SUMMARY
[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of stiff composite pile. The utility model improves the bonding strength of rigid pile concrete-flexible pile cement soil interface by increasing the roughness of the outer surface of the rigid pile, thereby enhancing the bearing capacity of the stiff composite pile.
[0005] In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is:
[0006] A kind of stiff composite pile, comprising:
[0007] Flexible pile, arranged in foundation soil;
[0008] Rigid pile, inserted into the flexible pile, the rigid pile is composed of rigid pile inner core and rigid pile outer core, the rigid pile inner core and the rigid pile outer core are connected by concrete. The rigid pile outer core is provided with a cylindrical recess for enhancing the bonding force of rigid pile concrete-flexible pile cement soil interface, and the rigid pile inner core is arranged along the axial direction of the rigid pile.
[0009] Preferably, the rigid pile outer core is arranged as a circular arc protruding from one side of the rigid pile inner core to the side of the flexible pile.
[0010] As a preferred embodiment of the utility model, the cylindrical recess is symmetrically distributed on the rigid pile outer core along the axial line of the rigid pile.
[0011] Preferably, the cylindrical recesses distributed on the same side of the rigid pile outer core are arranged in columns along the axis of the rigid pile from top to bottom, and the cylindrical recesses are arranged in odd-numbered columns along the rigid pile outer core.
[0012] Further preferably, the diameters of the cylindrical recesses are the same.
[0013] As another preferred embodiment of the present application, the rigid pile outer core can be designed as a ring-shaped distribution type, a single-symmetry type, a double-symmetry type, and a star-shaped distribution type.
[0014] Preferably, the cylindrical recesses distributed on the same side of the rigid pile outer core are arranged in columns along the axis of the rigid pile outer core from top to bottom, and the cylindrical recesses are arranged in odd-numbered columns.
[0015] Further preferably, the cylindrical recesses distributed on the same side of the ring-shaped distribution type rigid pile outer core are arranged in seven columns; the cylindrical recesses distributed on the same side of the single-symmetry type rigid pile outer core are arranged in five columns; the cylindrical recesses distributed on the same side of the double-symmetry type rigid pile outer core are arranged in three columns; and the cylindrical recesses distributed on the same side of the star-shaped distribution type rigid pile outer core are arranged in three columns.
[0016] Further preferably, the number of columns of the cylindrical recesses on the ring-shaped distribution type rigid pile outer core is fourteen; the number of columns of the cylindrical recesses on the single-symmetry type rigid pile outer core is ten; the number of columns of the cylindrical recesses on the double-symmetry type rigid pile outer core is twelve; and the number of columns of the cylindrical recesses on the star-shaped distribution type rigid pile outer core is nine.
[0017] Compared with the prior art, the present application has the following beneficial effects: on the basis of the traditional rigid pile, the present application adds an outer core, and the outer core is provided with cylindrical recesses, and the outer core is designed as a circular arc protruding from the side of the rigid pile inner core to the side of the flexible pile. During the insertion of the rigid pile into the flexible pile in the present application, the protruding rigid pile will compact the flexible pile, thereby increasing the side friction between the flexible pile and the soil around the pile; in addition, part of the flexible pile cement soil can be filled into the cylindrical recesses on the outer core of the rigid pile, thereby increasing the bonding force of the rigid pile concrete-flexible pile cement soil interface and improving the load bearing capacity of the stiff composite pile. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 FIG. 1 is a structural schematic diagram of a rigid pile of the present application.
[0019] Figure 2 FIG. 2 is a structural schematic diagram of a stiff composite pile of the present application.
[0020] Figure 3 FIG. 3 is a structural schematic diagram of a ring-shaped distribution of a rigid pile outer core of the present application.
[0021] Figure 4 is a front view of the utility model. Figure 3
[0022] Figure 5 is a front view of the utility model. Figure 3
[0023] Figure 6 is a structure schematic diagram of the rigid pile outer core one-way symmetry distribution of the utility model.
[0024] Figure 7 is a front view of the utility model. Figure 6
[0025] is a left view of the utility model. Figure 8 Figure 6
[0026] Figure 9 is a front view of the utility model. Figure 6
[0027] Figure 10 is a B-B section schematic diagram of the utility model. Figure 6
[0028] Figure 11 is a structure schematic diagram of the rigid pile outer core two-way symmetry distribution of the utility model.
[0029] Figure 12 is a front view of the utility model. Figure 11
[0030] Figure 13 is a A-A section schematic diagram of the utility model. Figure 11
[0031] Figure 14 is a B-B section schematic diagram of the utility model. Figure 11
[0032] Figure 15 is a structure schematic diagram of the rigid pile outer core star distribution of the utility model.
[0033] Figure 16 is a side cross section schematic diagram of the utility model. Figure 15
[0034] Figure 17 is a A-A section schematic diagram of the utility model. Figure 15
[0035] Figure 18 is a B-B section schematic diagram of the utility model. Figure 15
[0036] Figure 19 is a C-C section schematic diagram of the utility model. Figure 15
[0037] The meanings of the marks in the figures are as follows:
[0038] 1 - rigid pile outer core; 2 - cylindrical recess; 3 - rigid pile inner core; 4 - rigid pile; 5 - flexible pile; 6 - ground soil. DETAILED DESCRIPTION
[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0040] As shown in Figures 1-2 A stiff composite pile comprises: a flexible pile 5 arranged in ground soil 6; a rigid pile 4 inserted into the flexible pile 5, wherein the rigid pile 4 is composed of an inner core 3 and an outer core 1, the rigid pile outer core 1 and the rigid pile inner core 3 are integrated by concrete, and a cylindrical recess 2 is arranged on the rigid pile outer core 1.
[0041] As shown in Figure 3 、 6 , 11, 15, the rigid pile outer core 1 is designed as a circular arc surface protruding from the rigid pile inner core 3 to one side of the flexible pile 5.
[0042] As shown in Figures 3-4 , 6-8, 11-12, 15-16, the cylindrical recess 2 on one side of the rigid pile outer core 1 is arranged in a column along the rigid pile axis from top to bottom in the embodiment.
[0043] The number, aperture, depth and spacing of adjacent holes of the cylindrical recess 2 are determined according to specific engineering requirements.
[0044] The rigid pile outer core 1 in the utility model mainly has the following four distribution modes:
[0045] 1. Annular distribution type
[0046] As shown in Figures 3-5 , the cylindrical recess 2 is symmetrically distributed on different sides of the rigid pile outer core 1 along the rigid pile axis.
[0047] The cylindrical recess 2 distributed on the same side of the rigid pile outer core 1 is distributed in a column along the rigid pile outer core axis from bottom to top, and the number of columns is set to seven.
[0048] 2. Unidirectional symmetry type
[0049] As shown in Figures 6-10As shown, the cylindrical concave holes 2 distributed on the same side of the rigid pile outer core 1 are arranged in rows from top to bottom along the axis of the rigid pile outer core, and the cylindrical concave holes 2 are evenly distributed in an odd number of rows along the rigid pile outer core 1.
[0050] The cylindrical concave holes 2 are arranged in five rows on each side of the outer core 1 of the rigid pile.
[0051] 3. Two-way symmetrical type
[0052] like Figures 11-14 As shown, the cylindrical recesses 2 are arranged in rows from top to bottom along the outer core axis of the rigid pile 1. Each side has three rows of cylindrical recesses 2.
[0053] 4. Star-shaped distribution
[0054] like Figures 15-19 As shown, the cylindrical concave holes 2 distributed on the same side of the rigid pile outer core 1 are arranged in three rows.
[0055] The outer core 1 of the ring-shaped rigid pile has fourteen rows of cylindrical recesses 2; the outer core 1 of the unidirectional symmetrical rigid pile has ten rows of cylindrical recesses 2; the outer core 1 of the bidirectional symmetrical rigid pile has twelve rows of cylindrical recesses 2; and the outer core 1 of the star-shaped rigid pile has nine rows of cylindrical recesses 2.
[0056] It should be noted that the embodiments mentioned above are merely examples illustrating the concept and are not intended to limit all possible implementations of this utility model. Those skilled in the art will recognize that many different variations and modifications can be made based on the above description. Since these variations and modifications are endless, they cannot all be listed here. However, any obvious variations or modifications made based on the core idea of this utility model will be considered within the protection scope of this utility model.
Claims
1. A ductile composite pile, characterized by, The utility model relates to a flexible pile (5) is arranged in the foundation soil (6) in the depth of being determined, rigid pile (4) is inserted in the flexible pile (5), the rigid pile (4) is composed of rigid pile outer core (1) and rigid pile inner core (3), the rigid pile outer core (1) and the rigid pile inner core (3) are integrated by concrete, and the cylindrical recess (2) is arranged on the rigid pile outer core (1). The rigid pile outer core (1) is designed as the circular arc shape that protrudes from the side of rigid pile inner core (3) to the side of flexible pile (5). The cylindrical recess (2) 2. The stiff composite pile according to claim 1, wherein: The cylindrical recess (2) is arranged in the form of column along the rigid pile axis from top to bottom on the rigid pile outer core (1).
3. The stiff composite pile of claim 1, wherein: The rigid pile outer core (1) can be designed as annular distribution type, one-way symmetry type, two-way symmetry type and star distribution type. The cylindrical recess (2) on each side of the annular distribution type rigid pile outer core (1) is arranged as seven columns, and the column number of all cylindrical recesses (2) is fourteen.
4. The stiff composite pile of claim 1, wherein: The cylindrical recess (2) on each side of the one-way symmetry type rigid pile outer core (1) is arranged as five columns, and the column number of all cylindrical recesses (2) is ten.
5. A stiff composite pile according to claim 4, wherein: The cylindrical recess (2) on each side of the two-way symmetry type rigid pile outer core (1) is arranged as three columns, and the column number of all cylindrical recesses (2) is twelve.
6. A composite stiff pile according to claim 4, wherein: The cylindrical recess (2) on each side of the star distribution type rigid pile outer core (1) is arranged as three columns, and the column number of all cylindrical recesses (2) is nine.
7. The stiff composite pile of claim 4, wherein: 8. The stiff composite pile of claim 4, wherein: