Novel flow-state solidified soil core gravel pile composite structure

Abstract

The utility model relates to the technical field of pile foundations, in particular to a novel flow-state solidified soil core gravel pile combined structure which comprises a PVC pipe, a flow-state solidified soil core pile layer is arranged on the inner wall of the PVC pipe in a filling mode, a gravel pile layer is arranged on the outer side of the PVC pipe, an external thread boss is fixedly arranged on the outer wall of one end of the PVC pipe, and the PVC pipe is arranged in a steel casing through a supporting assembly and a positioning assembly. The threaded sleeve is rotated to move downwards along the outer threaded boss, the guide rod and the connecting rod are matched to push the cushion table to be clamped with the inner wall of the steel casing, then the position of the threaded sleeve is fixed to ensure that the PVC pipe is located in the center of the steel casing, and the flow-state solidified soil is poured into the PVC pipe to form the flow-state solidified soil core pile. And then sand is filled between the steel casing and the PVC pipe to form a sand-gravel pile, so that the sand-gravel pile forms an integral flow-state solidified soil core sand-gravel pile, and the bearing capacity of a foundation is improved by integrating the physical properties and erosion resistance of the flow-state solidified soil core sand-gravel pile.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pile foundation technical field, concretely to a new type of fluid solidified soil core sand stone pile combination structure. BACKGROUND

[0002] In road engineering, foundation settlement is a problem that cannot be avoided. In order to reduce the impact of foundation settlement on road traffic, piles are used to reinforce the foundation. Piles can transfer the load on the road surface to the soil layer with stronger bearing capacity, and also improve the bearing capacity and density of the foundation soil through soil compaction.

[0003] The existing patent file with the publication number CN219862915U discloses a combined pile foundation structure, which belongs to the field of pile foundations. The combined pile foundation structure includes a combined pile, which includes a plurality of pipe bodies. The pipe bodies are inserted into the soil layer and arranged in a circular array. The pipe bodies form a cavity. A filling layer is arranged in the cavity to prevent the combined pile from deforming under the action of lateral shear force. A fixing assembly is arranged on the combined pile to connect the combined pile and the filling layer so that they work together. A protective layer is arranged on the combined pile in a circumferential direction to protect the combined pile and the fixing assembly. This structure can transfer the load of the upper building to the soil layer with strong bearing capacity deep in the ground. It meets the requirements of bearing capacity and settlement, overcomes the problems of difficult and dangerous construction caused by complex ground conditions and steep terrain, improves construction efficiency, saves time and construction cost.

[0004] However, the above-mentioned scheme and existing technology require pile foundation construction in the steel casing. Currently, common pile foundations include cement mixing piles, which are easily eroded by pore water and affect the bearing capacity of the foundation. Therefore, improvement and optimization are needed.

[0005] Therefore, the utility model provides a new type of fluid solidified soil core sand stone pile combination structure to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a new type of fluid solidified soil core sand stone pile combination structure to solve the problems in the background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a new type of fluid solidified soil core sand stone pile combination structure, which includes:

[0008] The PVC pipe is filled with a fluid solidified soil core pile layer on the inner wall. The sand stone pile layer is arranged on the outer side of the PVC pipe. An external thread boss is fixedly arranged on the outer wall of one end of the PVC pipe. The PVC pipe is arranged in the steel casing through the support assembly and the positioning assembly.

[0009] The connecting block in the support assembly is fixed equidistantly and annularly on the peripheral wall of the PVC pipe, a connecting rod is rotatably arranged on the connecting block, three equidistantly annularly arranged cushion tables are rotatably connected with the two ends of the connecting rods, the connecting rods rotatably connected with the cushion tables are arranged in parallel, the cushion tables are clamped with the inner wall of the steel casing, and the threaded sleeve is threadedly connected with the outer threaded boss.

[0010] An annular groove is formed in the outer wall of the threaded sleeve, a fixing ring is sleeved with the threaded sleeve, and a connecting ring is fixedly arranged on the inner side wall of the fixing ring and movably sleeved in the annular groove.

[0011] An inclined guide rod is fixedly arranged equidistantly and annularly on the outer wall of the fixing ring, and the other end of the guide rod is rotatably connected with the cushion table.

[0012] The trapezoidal protrusions in the positioning assembly are fixed equidistantly and annularly on the side wall of the threaded sleeve, an inclined fixing plate is fixedly arranged on the trapezoidal protrusion, and a convex column is fixedly arranged on the side wall of the fixing plate.

[0013] The convex column is arranged in an inclined manner upwards, a knob bolt is threadedly connected with the side wall of the convex column, the end cap of the knob bolt is smaller in diameter than the diameter of the convex column, an anti-skid pad is rotatably arranged on the end of the knob bolt and penetrates through the fixing plate, the anti-skid pad is clamped with the inclined surface of the trapezoidal protrusion, and the anti-skid pad is clamped with the outer threaded boss.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] By rotating the threaded sleeve to move downwards along the outer threaded boss, the guide rod and the connecting rod cooperate to push the cushion table to be clamped with the inner wall of the steel casing, the position of the threaded sleeve is fixed to ensure that the PVC pipe is located at the central position of the steel casing, the fluidified soil core pile is formed by pouring the fluidified soil into the PVC pipe, the sand pile is formed by filling the sand between the steel casing and the PVC pipe, and the fluidified soil core sand pile is formed as a whole, the physical performance and the anti-erosion of the fluidified soil core sand pile are improved, and the bearing capacity of the foundation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Figure 2 It is a sectional view of the pile body of the utility model;

[0018] Figure 3 It is a structural connection schematic view of the PVC pipe of the utility model;

[0019] Figure 4 It is a structural connection schematic view of the threaded sleeve of the utility model;

[0020] Figure 5 It is a partial enlarged view of the utility model Figure 4 ​

[0021] In the figure: PVC pipe 1, flow state solidified soil core pile layer 2, sand and stone pile layer 3, steel casing 4, external thread boss 5, connecting block 6, connecting rod 7, pad 8, threaded sleeve 9, ring groove 10, fixing ring 11, connecting ring 12, guide rod 13, trapezoidal protrusion 14, fixing plate 15, protruding column 16, knob bolt 17, non-slip pad 18. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below. All other embodiments obtained by those skilled in the art without creative labor on the premise of the embodiments in the present application belong to the scope of protection of the present application.

[0023] Please refer to Figures 1-5 The present application provides the following two preferred embodiments:

[0024] Embodiment one: a novel flow state solidified soil core sand and stone pile combined structure, comprising: a PVC pipe 1, a flow state solidified soil core pile layer 2 is filled and arranged on the inner wall of the PVC pipe 1, a sand and stone pile layer 3 is arranged on the outer side of the PVC pipe 1, an external thread boss 5 is fixedly arranged on the outer wall of one end of the PVC pipe 1, and the PVC pipe 1 is arranged in a steel casing 4 through a supporting assembly and a positioning assembly; connecting blocks 6 in the supporting assembly are equidistantly and annularly fixedly arranged on the peripheral wall of the PVC pipe 1, connecting rods 7 are rotatably arranged on the connecting blocks 6, three pads 8 are equidistantly and annularly arranged, the pads 8 are rotatably connected with the end portions of the two connecting rods 7, the connecting rods 7 rotatably connected with the pads 8 are arranged in parallel, the pads 8 are clamped with the inner wall of the steel casing 4, and a threaded sleeve 9 is threadedly connected with the external thread boss 5; a ring groove 10 is formed on the outer wall of the threaded sleeve 9, a fixing ring 11 is sleeved with the threaded sleeve 9, a connecting ring 12 is fixedly arranged on the inner side wall of the fixing ring 11, and the connecting ring 12 is movably sleeved in the ring groove 10; guide rods 13 are equidistantly and annularly rotatably arranged on the outer wall of the fixing ring 11, and the other ends of the guide rods 13 are rotatably connected with the pads 8.

[0025] In use, after the steel casing 4 is installed, the PVC pipe 1 is placed in the steel casing 4, one side of the PVC pipe 1 with the external thread boss 5 is located in the upper position, then the threaded sleeve 9 is rotated to move downward along the external thread boss 5, thereby driving the fixing ring 11 to move downward, in the process, the guide rod 13 changes the inclination angle to cooperate with the end of the two horizontal connecting rods 7 and the rotating connection of the pad 8, to realize the pushing of the pad 8 to move in the direction of the inner wall of the steel casing 4, until the three pads 8 are clamped with the inner wall of the steel casing 4, the position of the fixed threaded sleeve 9 is ensured, and the PVC pipe 1 is located in the center position of the steel casing 4, and the flow state solidified soil is poured into the PVC pipe 1 in an external pouring manner, since the flow state solidified soil has good fluidity, it can be self-leveling and self-compacting, so it is not necessary to perform additional stirring and other operations, after the flow state solidified soil core pile in the PVC pipe 1 has a certain strength, the flow state solidified soil core pile layer 2 is formed, the well-graded sand and stone is filled between the PVC pipe 1 and the steel casing 4 to form a sand and stone pile layer 3, and the surrounding sand and stone shell ensures the drainage capacity of the flow state solidified soil core sand and stone pile, avoiding the problem of pore water erosion, after the filling is completed, the steel casing 4 is pulled out, in the pulling process, the mud pump is used to pour mud into the gap along the hole wall, and the whole process maintains the uniform speed of pouring mud and the uniform speed of pulling out the steel casing; the flow state solidified soil core pile is formed by pouring the flow state solidified soil into the PVC pipe 1, and the sand and stone pile is filled between the steel casing and the PVC pipe to form a sand and stone pile, so that the flow state solidified soil core sand and stone pile is formed as a whole, the two piles are combined, which can effectively improve the vertical bearing capacity of the whole pile foundation, since the modulus difference between the flow state solidified soil core and the sand and stone pile is small, compared with the concrete core sand and stone pile, the flow state solidified soil core sand and stone pile has better integrity; moreover, under the action of load, the two can deform cooperatively to bear the load together, and better cope with the uneven settlement of the foundation; the physical properties and erosion resistance of the flow state solidified soil core sand and stone pile improve the bearing capacity of the foundation.

[0026] In example two, on the basis of example one, the trapezoidal protrusions 14 in the positioning assembly are equidistantly and annularly fixed on the side wall of the threaded sleeve 9, the fixing plate 15 is fixedly arranged on the trapezoidal protrusion 14, and the protruding column 16 is fixedly arranged on the side wall of the fixing plate 15; the protruding column 16 is arranged in an inclined upward manner, the knob bolt 17 is threadedly connected to the side wall of the protruding column 16, the end cap of the knob bolt 17 has a smaller diameter than the diameter of the protruding column 16, the end of the knob bolt 17 is rotatably provided with the anti-skid pad 18 penetrating through the fixing plate 15, the anti-skid pad 18 is clamped with the inclined surface of the trapezoidal protrusion 14, and the anti-skid pad 18 is clamped with the external thread boss 5.

[0027] In use, the knob bolt 17 end cap diameter is less than the diameter of the convex column 16, facilitating the convex column 16 to be sleeved into the steel pipe for rotating the threaded sleeve 9, when the three pads 8 are clamped with the inner wall of the steel casing 4, rotating the knob bolt 17 controls the anti-skid pad 18 to move along the inclined surface of the trapezoidal convex block 14 until the anti-skid pad 18 is clamped with the thread of the outer thread convex 5, realizing the position fixation of the threaded sleeve 9, avoiding the offset of the PVC pipe 1 during the construction penetration, ensuring that the PVC pipe 1 is located at the center position, facilitating the uniform filling of the sand and gravel pile layer 3 on the outer side of the PVC pipe 1, facilitating the drainage of the flow state solidified soil core sand and gravel pile, and avoiding the pore water erosion.

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel fluidized solidified soil-core gravel pile composite structure, characterized in that: include: PVC pipe (1), the inner wall of the PVC pipe (1) is filled with a fluidized solidified soil core pile layer (2), the outer side of the PVC pipe (1) is provided with a sand and gravel pile layer (3), one end of the outer wall of the PVC pipe (1) is fixed with an external threaded boss (5), and the PVC pipe (1) is set in the steel casing (4) through a support component and a positioning component.

2. The novel fluidized solidified soil-core gravel pile composite structure according to claim 1, characterized in that: The connecting blocks (6) in the support assembly are fixedly arranged in a ring at equal intervals on the periphery of the PVC pipe (1). Connecting rods (7) are rotatably arranged on the connecting blocks (6). Three pads (8) are arranged in a ring at equal intervals. The pads (8) are rotatably connected to the ends of two connecting rods (7), and the connecting rods (7) rotatably connected to the pads (8) are arranged in parallel. The pads (8) are snapped into the inner wall of the steel sleeve (4). The threaded sleeve (9) is threadedly connected to the external threaded boss (5).

3. The novel fluidized solidified soil-core gravel pile composite structure according to claim 2, characterized in that: The threaded sleeve (9) has an annular groove (10) on its outer wall. A fixed ring (11) is sleeved with the threaded sleeve (9). A connecting ring (12) is fixedly installed on the inner side wall of the fixed ring (11). The connecting ring (12) is movably sleeved in the annular groove (10).

4. The novel fluidized solidified soil-core gravel pile composite structure according to claim 3, characterized in that: The outer wall of the fixed ring (11) is provided with guide rods (13) that are equidistantly arranged in a ring. The other end of the guide rods (13) is rotatably connected to the pad (8).

5. The novel fluidized solidified soil-core gravel pile composite structure according to claim 1, characterized in that: The trapezoidal protrusions (14) in the positioning assembly are equidistantly and annularly fixed on the side wall of the threaded sleeve (9). A fixing plate (15) is obliquely fixed on the trapezoidal protrusions (14), and a protruding post (16) is fixed on the side wall of the fixing plate (15).

6. A novel fluidized solidified soil-core gravel pile composite structure according to claim 5, characterized in that: The protruding post (16) is inclined upward. A knob bolt (17) is threaded on the side wall of the protruding post (16). The diameter of the end cap of the knob bolt (17) is smaller than the diameter of the protruding post (16). The end of the knob bolt (17) passes through the fixing plate (15) and is rotatably provided with an anti-slip pad (18). The anti-slip pad (18) is engaged with the inclined surface of the trapezoidal protrusion (14) and the anti-slip pad (18) is engaged with the external threaded boss (5).

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