Pile net composite foundation structure

Abstract

The invention relates to the technical field of soft soil foundation construction, and discloses a pile net composite foundation structure which comprises a pile foundation, a pile cap and a grid grating, the pile foundation is used for being arranged in a foundation, the pile cap comprises an upper component and a lower component fixedly connected with the upper component, and the lower component covers the pile foundation in the vertical direction; one of the upper component and the lower component is provided with an inserting groove, the other one of the upper component and the lower component is provided with a protrusion, the protrusion is inserted into the inserting groove in the vertical direction, the grid grating is arranged between the upper component and the lower component, and the protrusion penetrates through grating holes of the grid grating in the vertical direction. The grid grating is clamped between the upper component and the lower component, and meanwhile the protrusions penetrate through the grating holes of the grid grating to fix the grid grating, so that displacement or deformation of the grid grating under the load effect is effectively avoided, the grid grating is prevented from being disengaged from the pile cap, the grid grating is prevented from being torn or broken by pulling force, and the service life of the grid grating is prolonged. The lateral constraining force on soil bodies between the piles is improved, the settlement difference caused by collision is effectively reduced, and the service life of a foundation is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of soft soil foundation construction, and in particular to a pile-net composite foundation structure. Background Art

[0002] Traditional pile foundation structures often have problems such as uneven soil settlement between piles and uneven force on pile caps when dealing with soft foundations or complex loads. The pile-grid composite foundation combines the pile cap with the grid. The grid is laid after the pile foundation is set. This not only enhances the uniformity of load distribution on the pile top, but also effectively improves the lateral restraint of the soil between piles and reduces settlement differences. It has been widely used in soft soil foundation construction, and effectively improves the foundation bearing capacity through the combined action of the pile foundation and the grid.

[0003] In the existing pile-net composite foundation, the connection between the pile foundation and the grid grid usually relies on a simple placement method, and the grid grid is laid flat on the upper side of the pile foundation. For example, the patent with the authorization announcement number CN221798496U discloses a pipe pile type deep reinforcement treatment and anti-settlement construction structure for soft foundation of highway bridge head, including: prefabricated pipe piles, which are fixedly filled with core-filled concrete; concrete pile caps, which are respectively fixedly connected to the prefabricated pipe piles and the core-filled concrete; geogrids, which are laid and fixed on the top of the concrete pile caps; and cushion layers, which are laid and fixed on the top of the geogrids.

[0004] After the grid grille is laid on the top of the pile foundation, there is a lack of fixed connection between the two, which results in the inability to effectively disperse the pile foundation load to the grille. The pile foundation may bear too much load regardless of each other, increasing the settlement difference between piles. In addition, due to the uneven load transfer and the long-term stress on the foundation, especially the soil settlement between piles will be greater than the soil settlement on the top of the pile, the grille between the piles will be subjected to greater tension, and the uneven settlement will aggravate the fatigue damage of the grille. The grid is prone to displacement or deformation, resulting in the grille being detached from the pile foundation or poor contact. Long-term deformation may cause the grille to tear or break, affecting the service life of the grille, further causing the soil to lose restraint, weakening the overall stability of the foundation, and affecting the foundation performance. Summary of the invention

[0005] The purpose of the present invention is to provide a pile-net composite foundation structure to solve the problem in the prior art that there is a lack of fixed connection between the grid of the pile foundation and the pile foundation, which affects the service life of the grid and the foundation performance.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a pile-net composite foundation structure, comprising a pile foundation, a pile cap and a grid grille, wherein the pile foundation is used to be arranged in a foundation, the pile cap comprises an upper member and a lower member fixedly connected to the upper member, the lower member covers the pile foundation in a vertical direction, one of the upper member and the lower member is provided with a slot and the other is provided with a protrusion, the protrusion is inserted into the slot in a vertical direction, the grid grille is arranged between the upper member and the lower member, and the protrusion passes through the grille holes of the grid grille in a vertical direction.

[0007] Preferably, the protrusion and the slot are engaged in a rotation-stopping manner around a vertical direction.

[0008] Preferably, the slot includes a locking hole and a locking groove connected to the locking hole, the protrusion includes a main body and a ridge connected to the main body, the main body is inserted into the locking hole along a vertical direction, and the ridge is inserted into the locking groove along a vertical direction.

[0009] Preferably, the locking hole is a cylindrical structure, at least two locking grooves are provided along the circumference of the locking hole, the main body is a cylindrical structure, at least two ridges are provided along the circumference of the main body, and the locking grooves are plug-in connected one by one.

[0010] Preferably, the lower member is a rectangular parallelepiped structure, and the top surface of the lower member facing the upper member is a roughened surface.

[0011] Preferably, the lower member is a conical structure, and a plurality of conical surfaces are provided on a side of the lower member away from the lower member, and the conical surfaces are spaced apart from each other from the top end to the bottom end.

[0012] Preferably, the grid grille is a composite material made of carbon fiber material and corrosion-resistant steel.

[0013] Preferably, the pile-net composite foundation structure further comprises a filling material, a plurality of the pile foundations and the pile caps are provided in one-to-one correspondence, adjacent pile foundations are filled with the filling material, and the grid grille covers the filling material.

[0014] Compared with the prior art, a pile-net composite foundation structure according to an embodiment of the present invention has the following beneficial effects: the pile cap is formed by an upper member and a lower member, and the mesh grille is clamped between the upper member and the lower member, and the mesh grille is fixed by clamping. At the same time, protrusions and slots are provided on the upper member and the lower member for insertion and cooperation, and the protrusions penetrate through the grille holes of the mesh grille to fix the mesh grille, thereby effectively preventing the mesh grille from being displaced or deformed under load, preventing the mesh grille from being detached from the pile cap, and preventing the mesh grille from being torn or broken by tension, thereby extending the service life of the mesh grille, improving the lateral restraint on the soil between piles, effectively reducing the difference in settlement, and extending the life of the foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the pile-net composite foundation structure of the present invention;

[0016] Figure 2 yes Figure 1 A schematic structural diagram of a lower member of a pile cap of a pile-net composite foundation structure;

[0017] Figure 3 yes Figure 2 A top view of a lower member of

[0018] Figure 4 yes Figure 1 A schematic structural diagram of an upper member of a pile cap of a pile-net composite foundation structure;

[0019] Figure 5 yes Figure 4 Bottom view of the upper component.

[0020] In the figure, 1, pile foundation, 2, pile cap, 21, lower member, 211, roughened surface, 22, upper member, 221, conical surface, 3, grid, 4, protrusion, 41, main body, 42, ridge, 5, slot, 51, locking hole, 52, locking groove, 6, filling material. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] A preferred embodiment of a pile-net composite foundation structure of the present invention is as follows: Figures 1 to 5 As shown, the pile-net composite foundation structure includes a pile foundation 1 , a pile cap 2 and a grid 3 .

[0023] The pile foundation 1 is used to be arranged in the foundation and is the supporting contact of the foundation structure. The pile foundation 1 can be in the form of prefabricated piles or cast-in-place piles, which can be constructed on site as needed. The pile cap 2 and the grid grid 3 can be modularly designed, can be prefabricated in batches and quickly installed, and the construction is convenient and simple, which can reduce the difficulty of on-site construction, improve construction efficiency, and reduce engineering costs.

[0024] The pile cap 2 includes an upper member 22 and a lower member 21 fixedly connected to the upper member 22. The bottom surface size of the upper member 22 matches the top surface size of the upper member 22, and the upper member 22 is seated on the lower member 21. The lower member 21 covers the top of the pile foundation 1 in the vertical direction. The lower member 21 and the pile foundation 1 are fixedly connected to form an integrated structure, ensuring that the lower member 21 stably covers the pile foundation 1 in the vertical direction. The lower member 21 is the bearing and dispersion basis of the pile top load.

[0025] One of the upper member 22 and the lower member 21 is provided with a slot 5 and the other is provided with a protrusion 4. The protrusion 4 is inserted into the slot 5 in the vertical direction. After the protrusion 4 is inserted into the slot 5, the upper member 22 and the lower member 21 are locked and fixed. In this embodiment, the protrusion 4 is arranged on the top of the lower member 21, and the slot 5 is opened on the bottom surface of the upper structure close to the lower member 21. The slot 5 and the protrusion 4 are arranged opposite to each other in the vertical direction to ensure that the protrusion 4 can be inserted into the slot 5 after the upper member 22 and the lower member 21 are assembled.

[0026] The mesh grille 3 is arranged between the upper member 22 and the lower member 21, and the protrusion 4 vertically penetrates the grille holes of the mesh grille 3. The upper member 22 and the lower member 21 fix the mesh grille 3 by clamping, and the protrusion 4 can also lock and fix the mesh grille 3, effectively solving the problem of the mesh grille 3 being loose, preventing the mesh grille 3 from being displaced or deformed under load, preventing the mesh grille 3 from being disengaged from the pile cap 2, and extending the service life of the mesh grille 3.

[0027] The pile cap 2 of the pile-net composite foundation structure is formed by an upper member 22 and a lower member 21, and the grid grille 3 is clamped between the upper member 22 and the lower member 21, and the grid grille 3 is fixed by clamping. At the same time, protrusions 4 and slots 5 are provided on the upper member 22 and the lower member 21 for plug-in cooperation. The protrusion 4 passes through the grille holes of the grid grille 3 to fix the grid grille 3, which effectively avoids displacement or deformation of the grid grille 3 under load, prevents the grid grille 3 from being disengaged from the pile cap 2, and prevents the grid grille 3 from being torn or broken by tension, thereby extending the service life of the grid grille 3, improving the lateral restraint on the soil between piles, effectively reducing the difference in settlement, and extending the life of the foundation.

[0028] Preferably, the protrusion 4 and the slot 5 are engaged in a rotation-proof manner around the vertical direction.

[0029] The protrusion 4 and the slot 5 are matched to prevent rotation around the vertical direction. After the upper component 22 and the lower component 21 are connected, there is a locking effect between the protrusion 4 and the slot 5, which increases the stability of the connection between the upper component 22 and the lower component 21.

[0030] Preferably, the slot 5 includes a locking hole 51 and a locking groove 52 connected to the locking hole 51, the protrusion 4 includes a main body 41 and a ridge 42 connected to the main body 41, the main body 41 is inserted into the locking hole 51 along the vertical direction, and the ridge 42 is inserted into the locking groove 52 along the vertical direction.

[0031] The locking hole 51 and the locking groove 52 form a slot 5, and the main body 41 and the ridge 42 form a protrusion 4. After the ridge 42 is inserted into the locking groove 52 in the vertical direction, the ridge 42 and the inner wall of the locking groove 52 are blocked in the vertical direction, thereby preventing the protrusion 4 and the slot 5 from rotating relative to each other in the vertical direction. Self-locking is formed between the upper member 22 and the lower member 21, ensuring that the mesh grille 3 is firmly clamped, and also ensuring stable contact and uniform force between the mesh grille 3 and the pile cap 2.

[0032] Preferably, the locking hole 51 is a cylindrical structure, at least two locking grooves 52 are provided along the circumference of the locking hole 51, the main body 41 is a cylindrical structure, at least two ridges 42 are provided along the circumference of the main body 41, and the locking grooves 52 are plug-in connected one by one.

[0033] There are at least two locking grooves 52 and ridges 42. Multiple ridges 42 and locking grooves 52 are stressed at the same time, which can ensure that the force between the upper member 22 and the lower member 21 is uniform. In this embodiment, there are four locking grooves 52 and four ridges 42, and they are evenly distributed in a cross shape; in other embodiments, the number of locking grooves 52 and ridges 42 can be increased or decreased according to the diameter of the locking hole 51 and the main body 41.

[0034] Preferably, the lower member 21 is a rectangular parallelepiped structure, and the top surface of the lower member 21 facing the upper member 22 is a roughened surface 211 .

[0035] The top surface of the lower component 21 is a roughened surface 211 , which can increase the friction between the lower component 21 and the mesh grille 3 , making the mesh grille 3 more firmly clamped.

[0036] Preferably, the lower member 21 is a conical structure, and a plurality of conical surfaces 221 are provided on a side of the lower member 21 away from the lower member 21 , and the conical surfaces 221 are away from each other from the top end to the bottom end.

[0037] The lower member 21 adopts a conical structure. In this embodiment, the lower member 21 is a quadrangular pyramid with four conical surfaces 221. The conical surfaces 221 of the lower member 21 gradually disperse the load from the concentrated point at the top to the four bottom corners, forming a relatively uniform load distribution path. The load transferred to the bottom corners is further transferred to the clamped grid 3, so that the load is further dispersed between the piles, improving the stability of the arch foot of the soil arch. The conical surface 221 provides additional lateral force and reduces local settlement.

[0038] The quadrangular pyramid upper member 22 evenly distributes the vertical load to the grid 3 through structural optimization, reduces the risk of local settlement concentration, and improves the overall stability of the foundation. Compared with the flat pile cap 2, the quadrangular pyramid pile cap 2 reduces the concentration effect of the vertical load directly applied to the pile top, effectively reducing the local stress on the pile top.

[0039] Preferably, the grid grille 3 is a composite material made of carbon fiber material and corrosion-resistant steel.

[0040] The composite material made of carbon fiber material and corrosion-resistant steel has high strength, which significantly improves the lateral restraint of the soil between piles, effectively reduces the settlement difference between piles, and reduces the problem of uneven pile load. The grid grid 3 also has good corrosion resistance and anti-aging effects, making the foundation more durable and anti-aging in complex soil and environment, and extending the service life of the foundation.

[0041] Preferably, the pile-net composite foundation structure further includes filling material 6 , and a plurality of pile foundations 1 and pile caps 2 are provided in one-to-one correspondence, and adjacent pile foundations 1 are filled with filling material 6 , and the grid 3 covers the filling material 6 .

[0042] Filling material 6 is filled between the pile foundations 1 to form a composite structure, which can reinforce the overall structure of the foundation. The grid 3 covers the filling material 6, which can effectively reinforce the filling material 6, reduce the settlement difference, and further improve the overall stability of the foundation.

[0043] The use process of the pile-net composite foundation structure of the present invention is as follows: first, a pile foundation 1 is constructed at a predetermined position on the foundation, and the pile foundation 1 can be a driven or cast structure to ensure that the pile top height is consistent; a prefabricated lower component 21 is installed on the top of each pile foundation 1 to ensure that the lower component 21 covers the pile foundation 1, and the top surface of the lower component 21 is roughened; a mesh grille 3 is laid between adjacent pile foundations 1, the mesh grille 3 covers the lower component 21, and the protrusion 4 of the lower component 21 passes through the grille hole; an upper component 22 is installed above the mesh grille 3, and the protrusion 4 is inserted into the slot 5; and a filling material 6 is filled between the pile foundations 1.

[0044] In summary, the embodiments of the present invention provide a pile-net composite foundation structure, wherein the pile cap is formed by an upper member and a lower member, and the mesh grille is clamped between the upper member and the lower member, and the mesh grille is fixed by clamping. At the same time, protrusions and slots are provided on the upper member and the lower member for insertion and cooperation, and the protrusions penetrate through the grille holes of the mesh grille to fix the mesh grille, thereby effectively preventing the mesh grille from being displaced or deformed under the action of load, preventing the mesh grille from being detached from the pile cap, and preventing the mesh grille from being torn or broken by tension, thereby extending the service life of the mesh grille, improving the lateral restraint on the soil between piles, effectively reducing the difference in settlement, and extending the life of the foundation.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A pile-net composite foundation structure, characterized in that: The invention comprises a pile foundation (1), a pile cap (2) and a grid grille (3), wherein the pile foundation (1) is used for being arranged in a foundation, the pile cap (2) comprises an upper member (22) and a lower member (21) fixedly connected to the upper member (22), the lower member (21) covering the pile foundation (1) in a vertical direction, one of the upper member (22) and the lower member (21) being provided with a slot (5), and the other being provided with a protrusion (4), the protrusion (4) being inserted into the slot (5) in a vertical direction, the grid grille (3) being provided between the upper member (22) and the lower member (21), the protrusion (4) penetrating through the grid holes of the grid grille (3) in a vertical direction.

2. The pile-net composite foundation structure according to claim 1, characterized in that: In the vertical direction, the protrusion (4) and the slot (5) are engaged in a rotation-stopping manner.

3. The pile-net composite foundation structure according to claim 2, characterized in that: The slot (5) comprises a locking hole (51) and a locking groove (52) connected to the locking hole (51); the protrusion (4) comprises a main body (41) and a ridge (42) connected to the main body (41); the main body (41) is inserted into the locking hole (51) in a vertical direction; and the ridge (42) is inserted into the locking groove (52) in a vertical direction.

4. The pile-net composite foundation structure according to claim 3, characterized in that: The locking hole (51) is a cylindrical structure, at least two locking grooves (52) are provided at intervals along the circumference of the locking hole (51), the main body (41) is a cylindrical structure, at least two ridges (42) are provided at intervals along the circumference of the main body (41), and the locking grooves (52) and the ridges (42) are plug-in connected in a one-to-one correspondence.

5. The pile-net composite foundation structure according to any one of claims 1 to 4, characterized in that: The lower component (21) is a rectangular parallelepiped structure, and the top surface of the lower component (21) facing the upper component (22) is a roughened surface (211).

6. The pile-net composite foundation structure according to any one of claims 1 to 4, characterized in that: The lower member (21) is a conical structure, and a plurality of conical surfaces (221) are provided on a side of the lower member (21) away from the lower member (21), and the conical surfaces (221) are spaced apart from each other from the top end to the bottom end.

7. The pile-net composite foundation structure according to any one of claims 1 to 4, characterized in that: The mesh grille (3) is a composite material made of carbon fiber material and corrosion-resistant steel.

8. The pile-net composite foundation structure according to any one of claims 1 to 4, characterized in that: The pile-net composite foundation structure further comprises a filling material (6), a plurality of which are provided in a one-to-one correspondence between the pile foundations (1) and the pile caps (2), the adjacent pile foundations (1) are filled with the filling material (6), and the mesh grille (3) covers the filling material (6).

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