Soil squeezing prevention structure for large-area mucky soft soil substrate pipe pile construction

Abstract

The utility model relates to the technical field of soft soil base pipe pile construction, in particular to a large-area silt soft soil base pipe pile construction soil squeezing prevention structure which comprises a pipe pile, the pipe pile comprises a pile body and a pile tip, the pile tip is located at the bottom end of the pile body, a plurality of water inlet holes are formed in the pile tip in a penetrating mode, the water inlet holes are used for muddy water in a soil layer to pass through, and a plurality of auxiliary fixing assemblies are arranged on the side face of the pile body. A pile protecting cylinder is arranged outside the top of the pipe pile. By arranging the auxiliary fixing assembly and the pile protecting cylinder, when the pipe pile is inserted into a soil layer, the limiting plate can limit the moving direction of the side plate, the pipe pile is prevented from inclining due to the soil squeezing effect, meanwhile, the barb plate is squeezed towards the side plate, and the barb plate is prevented from damaging the soil layer; after pile driving is completed, when the pipe pile floats upwards due to the soil squeezing effect caused by follow-up pipe pile driving, soil is squeezed into the inclined face on the upper portion, the barb plate is driven to rotate outwards and downwards and be inserted into the soil layer, floating of the pipe pile is limited accordingly, meanwhile, the side plates can increase the resistance of lateral movement of the pipe pile, inclination of the pipe pile is avoided, and soil squeezing prevention is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of soft soil base pipe pile construction, in particular to a soil squeezing prevention structure for large-area silty soft soil base pipe pile construction. Background Art

[0002] The soil squeezing effect is a phenomenon that may be encountered during the construction of prestressed pipe piles. During the sinking process of soil squeezing piles, the volume of the piles "occupies" the original space of the soil, causing the soil around the piles to spread out. When the soil around the piles is an unsaturated soil layer, the volume of the soil will shrink when the soil is squeezed, which can effectively dissipate the squeezing stress. Therefore, the soil squeezing effect of soil squeezing piles in unsaturated soil layers is not obvious, and the negative impact caused is also small; when the soil around the piles is saturated soft soil, the volume of the soil will not shrink or the shrinkage is very small when it is squeezed, and the squeezing stress is mainly reduced by soil displacement. The soil squeezing effect is very significant, so the negative impact caused is greater.

[0003] The soft soil address prestressed pipe pile static pressure anti-squeezing soil structure provided with application number 202323142077.6 includes an anchor static pressure pile, two connecting sleeves are fixed on the outer wall of the anchor static pressure pile, a seat plate is fixed on the outside of the top of the anchor static pressure pile, an extension plate is provided at the rear end of the seat plate, and a plurality of inclined guide ducts are fixed on the top of the extension plate, a push rod is passed through the guide duct, and the bottom end of the push rod is inserted into the connecting sleeve.

[0004] The device uses an inclined support rod to increase the lateral support of the anchor pile and prevent the anchor pile from being offset due to the soil squeezing effect. However, a connecting sleeve is set on one side of the anchor pile. During the pile driving process, the connecting sleeve will be subjected to the friction of the soil layer, and the resistance on both sides of the anchor rod will be unbalanced, causing the anchor rod to deflect during pile driving. At the same time, the connecting sleeve will squeeze the soil layer, resulting in the squeezing force of the soil layer above the connecting sleeve on the anchor rod being less than the pressure on the opposite side, which will also cause the anchor rod to tilt. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a soil squeezing prevention structure for large-area silty soft soil base pipe pile construction.

[0006] The technical solution of the utility model is:

[0007] The anti-squeeze soil structure constructed by pipe piles on a large area of ​​silty soft soil base includes:

[0008] A pipe pile, wherein the pipe pile comprises a pile body and a pile tip, wherein the pile tip is located at the bottom of the pile body, and the pile tip is provided with a plurality of water inlet holes, wherein the water inlet holes are used for muddy water in the soil layer to pass through, a plurality of auxiliary fixing components are provided on the side of the pile body, and a pile protection tube is provided on the outer side of the top of the pipe pile;

[0009] The auxiliary fixing assembly includes a side plate, the side plate is parallel to the axis of the pipe pile, and the front and rear sides of the side plate are rotatably mounted with a barb plate, and the barb plate is used to hook the soil layer when the side plate moves upward;

[0010] The pile protection cylinder comprises a cylinder body, the cylinder body is inserted into the soil layer, a plurality of limit plates are arranged inside the cylinder body, an auxiliary plate inclined outward is arranged on the top of the limit plate, and the limit plate clamps the front and rear sides of the auxiliary fixing assembly.

[0011] Preferably, the pile body comprises an upper flange and a lower flange, the upper flange and the lower flange are connected by an axial steel bar, and the axial steel bar passes through the lower flange and is fixedly connected to the pile tip.

[0012] Preferably, the axial steel bars are horizontally connected with a plurality of steel bar rings, the axial steel bars and the steel bar rings are wrapped with a concrete wrapping layer, the inner side of the concrete wrapping layer is a drainage through hole, and the drainage through hole is connected with the water inlet hole.

[0013] Preferably, fixing plates are provided at both ends of the side plates, and the fixing plates are connected to the upper flange and the lower flange and penetrated by axial steel bars.

[0014] Preferably, a mounting groove is provided on the side surface of the side plate, and the bottom of the barb plate can be rotatably mounted on the outside of the mounting groove through a rotating pin, and half of the barb plate is located in the mounting groove.

[0015] Preferably, the bottom and top ends of the barb plate are provided with inclined surfaces, the inclined surfaces face the mounting groove, and when the barb plate is rotated downward by 60°, the inclined surfaces below will abut against the mounting groove.

[0016] Preferably, a force-bearing plate is provided on the top surface of the cylinder body, and a drainage groove is horizontally provided through the top surface of the force-bearing plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model provides an auxiliary fixing component and a pile protection tube, so that when the pipe pile is inserted into the soil layer, the limit plate can limit the moving direction of the side plate, prevent the pipe pile from tilting due to the soil squeezing effect, and at the same time squeeze the barb plate in the direction of the side plate to prevent the barb plate from damaging the soil layer; after the pile driving is completed, when the pipe pile floats up due to the soil squeezing effect caused by subsequent pipe pile driving, the soil squeezes into the upper inclined surface, driving the barb plate to rotate outward and downward and insert into the soil layer, thereby limiting the floating of the pipe pile, and at the same time the side plate can increase the resistance of the lateral movement of the pipe pile, avoid the pipe pile from tilting, and achieve soil squeezing prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the pipe pile in the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the middle pipe pile of the utility model;

[0022] Figure 4 This is an exploded schematic diagram of the auxiliary fixing component structure in the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the pile protection tube in the utility model.

[0024] The meaning of each number in the figure is:

[0025] 1. Pipe pile; 11. Upper flange; 12. Lower flange; 13. Axial reinforcement; 14. Rebar ring; 15. Concrete wrapping layer; 16. Pile tip; 17. Water inlet hole; 18. Drainage hole;

[0026] 2. Auxiliary fixing assembly; 21. Side plate; 22. Fixing plate; 23. Mounting groove; 24. Barb plate; 25. Inclined surface; 26. Rotating pin;

[0027] 3. Pile guard tube; 31. Tube body; 32. Load-bearing plate; 33. Drainage trough; 34. Limit plate; 35. Auxiliary plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] Embodiment 1:

[0031] See also Figure 1-5 The utility model describes the above technical solution in detail through the following embodiments:

[0032] The anti-squeeze soil structure constructed by pipe piles on a large area of ​​silty soft soil base includes:

[0033] The pipe pile 1 comprises a pile body and a pile tip 16, wherein the pile tip 16 is located at the bottom of the pile body, and a plurality of water inlet holes 17 are provided through the pile tip 16, and the water inlet holes 17 are used for muddy water in the soil layer to pass through. Four sets of auxiliary fixing components 2 are provided on the side of the pile body, and a pile guard tube 3 is provided on the outer side of the top of the pipe pile 1.

[0034] The pile tip 16 is made of welded steel plates, and concrete is poured inside. The whole is in the shape of a quadrangular pyramid, and the shape of the pile tip 16 is conducive to being inserted into the soil layer. After the pile tip 16 is inserted into the silt soil layer, the soil layer will be squeezed outward, and the muddy water in the soil layer can enter the inside of the pile tip 16 from the water inlet hole 17.

[0035] The pile body comprises an upper flange 11 and a lower flange 12 , the upper flange 11 and the lower flange 12 are connected by an axial steel bar 13 , and the axial steel bar 13 penetrates the lower flange 12 and is welded to the pile tip 16 .

[0036] The upper flange 11 and the lower flange 12 are both made of metal, and the axial reinforcement 13 is welded to the upper flange 11 and the lower flange 12. The upper flange 11 made of metal has good ductility and toughness, can withstand the impact of the pile driver, and can avoid concrete cracking.

[0037] The axial steel bars 13 are horizontally welded with a plurality of steel bar rings 14 . The axial steel bars 13 and the steel bar rings 14 are wrapped with a concrete wrapping layer 15 . The inner side of the concrete wrapping layer 15 is a drainage hole 18 , and the drainage hole 18 is connected to the water inlet hole 17 .

[0038] The steel ring 14 is used to enhance the crack resistance of the concrete enveloping layer 15 .

[0039] After the muddy water enters the water inlet hole 17, it enters the drainage through hole 18 as the pile driving depth increases. A known water pump or other water pumping tools can be used to pump out the water.

[0040] The auxiliary fixing assembly 2 includes a side plate 21, which is parallel to the axis of the pipe pile 1. The side plate 21 has a barb plate 24 rotatably mounted on both sides thereof. The barb plate 24 is used to hook the soil layer when the side plate 21 moves upward.

[0041] Since there are four sets of auxiliary fixing components 2 , there are four side panels 21 . The four side panels 21 are perpendicular to each other, and a line connecting two opposite side panels 21 passes through the axis of the upper flange 11 .

[0042] Fixed plates 22 are provided at both ends of the side plate 21 . The fixed plates 22 are welded to the upper flange 11 and the lower flange 12 and penetrated by axial steel bars 13 .

[0043] The side plates 21 can provide additional resistance when the pipe pile 1 is tilted due to the soil squeezing effect, thereby reducing the amplitude of the tilt and the influence of the soil squeezing effect.

[0044] A mounting groove 23 is provided on the side surface of the side plate 21 , and the bottom of the barb plate 24 can be rotatably mounted on the outside of the mounting groove 23 through a rotating pin 26 , and half of the barb plate 24 is located in the mounting groove 23 .

[0045] When the side plate 21 moves downward, the barb plate 24 moves downward with the side plate 21, so that the outer side of the barb plate 24 is squeezed by the soil layer below, and the barb plate 24 moves toward the installation groove 23 until half of the barb plate 24 is located in the installation groove 23. The installation groove 23 can reduce the overall thickness of the side plate 21 and the barb plate 24, avoid causing greater damage to the soil layer, and thus increase the influence of the soil layer effect.

[0046] The bottom and top ends of the hook plate 24 are provided with inclined surfaces 25 , and the inclined surfaces 25 face the mounting groove 23 . When the hook plate 24 is rotated downward by 60°, the inclined surfaces 25 below will abut against the mounting groove 23 .

[0047] When the side plate 21 moves upward, soil squeezes in between the top inclined surface 25 and the side plate 21, thereby pressing the hook plate 24 downward, and the hook plate 24 rotates downward and outward. When the lower inclined surface 25 abuts against the mounting groove 23, the hook plate 24 stops rotating, and the downward pressure exerted by the soil layer on the inner side of the hook plate 24 increases, thereby preventing the side plate 21 from moving upward.

[0048] The pile protection tube 3 includes a tube body 31, which is inserted into the soil layer. A plurality of limit plates 34 are welded inside the tube body 31, and an auxiliary plate 35 inclined outward is welded on the top of the limit plate 34. The limit plates 34 clamp the front and rear sides of the auxiliary fixing assembly 2.

[0049] The barrel 31 is inserted into the soil layer to prevent the soil from moving outwards due to the insertion of the pipe pile 1, thereby reducing the impact of the soil squeezing effect on the surroundings.

[0050] At the same time, the clamping of the auxiliary fixing assembly 2 by the limiting plate 34 can ensure that the auxiliary fixing assembly 2 moves along the limiting plate 34, and then ensure that the pipe pile 1 moves along the limiting plate 34, thereby preventing the pipe pile 1 from tilting.

[0051] The auxiliary plate 35 is used to assist the side plate 21 to align with the space between the two limiting plates 34 .

[0052] A force-bearing plate 32 is provided on the top surface of the cylinder body 31 , and a drainage groove 33 is horizontally penetrated through the top surface of the force-bearing plate 32 .

[0053] The force plate 32 is used to withstand the impact of the pile driver to prevent the top of the barrel 31 from being deformed, which would cause the pipe pile 1 and the auxiliary fixing assembly 2 to be unable to be inserted. At the same time, the drainage groove 33 can facilitate the discharge of mud and water inside the barrel 31.

[0054] When the operator of this embodiment uses this device, he drives the pile protection tube 3 into the pile point using a known pile driver. It should be noted that the axis of the tube body 31 should coincide with the center of the pile point, and the tube body 31 should be vertical until the bottom surface of the force plate 32 abuts against the ground.

[0055] The side plate 21 is aligned with the space between the two limit plates 34 , and the bottom end of the pile tip 16 is aligned with the axis of the barrel 31 .

[0056] The pipe pile 1 and the auxiliary fixing assembly 2 are driven into the soil layer using a known pile driver.

[0057] After the pile tip 16 is inserted into the muddy soil layer, it will squeeze the soil layer outwards, and the muddy water in the soil layer can enter the interior of the pile tip 16 through the water inlet hole 17.

[0058] Due to the pressing of the limiting plate 34 and the auxiliary plate 35 , the barb plate 24 is in a vertical state, and the inner side of the barb plate 24 is closely attached to the mounting groove 23 .

[0059] When the pipe pile 1 is inserted into the soil layer, the outer side of the barb plate 24 is squeezed by the soil layer below, and the inner side of the barb plate 24 is always kept in close contact with the installation groove 23 .

[0060] At the same time, after the muddy water enters the water inlet hole 17, as the pile driving depth increases, it enters the drainage through hole 18. After the pipe pile 1 reaches the predetermined depth, the muddy water can be pumped out from the drainage through hole 18 using a known pump or other pumping tools.

[0061] The water squeezed out during the piling process can be discharged through the drainage groove 33.

[0062] When the pipe pile 1 is tilted due to the soil squeezing effect, the side plates 21 provide additional resistance, thereby reducing the amplitude of the tilt and the influence of the soil squeezing effect.

[0063] When the pipe pile 1 floats up due to the soil squeezing effect, the side plate 21 floats up along with the pipe pile 1. At this time, the soil squeezes in between the top inclined surface 25 and the side plate 21, thereby pressing the barb plate 24 downward, and the barb plate 24 rotates downward and outward. When the lower inclined surface 25 abuts against the mounting groove 23, the barb plate 24 stops rotating, and the downward pressure exerted by the soil layer on the inner side of the barb plate 24 increases, thereby preventing the side plate 21 from floating up, and further preventing the pipe pile 1 from floating up.

[0064] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. The anti-squeeze soil structure is constructed by pipe piles on a large area of ​​silty soft soil, characterized in that: include: A pipe pile (1), the pipe pile (1) comprising a pile body and a pile tip (16), the pile tip (16) being located at the bottom of the pile body, the pile tip (16) being provided with a plurality of water inlet holes (17) through it, the water inlet holes (17) being used for muddy water in the soil layer to pass through, a plurality of auxiliary fixing components (2) being provided on the side of the pile body, and a pile protection tube (3) being provided on the outer side of the top of the pipe pile (1); The auxiliary fixing assembly (2) comprises a side plate (21), the side plate (21) is parallel to the axis of the pipe pile (1), and the side plate (21) is rotatably provided with a barb plate (24) at both the front and rear sides, and the barb plate (24) is used to hook the soil layer when the side plate (21) moves upward; The pile protection tube (3) comprises a tube body (31), the tube body (31) is inserted into the soil layer, a plurality of limit plates (34) are arranged inside the tube body (31), the top ends of the limit plates (34) are provided with auxiliary plates (35) inclined outwards, and the limit plates (34) clamp the front and rear sides of the auxiliary fixing assembly (2).

2. The anti-squeeze soil structure constructed by pipe piles on a large area of ​​silty soft soil base as claimed in claim 1, characterized in that: The pile body comprises an upper flange (11) and a lower flange (12), wherein the upper flange (11) and the lower flange (12) are connected via an axial steel bar (13), and the axial steel bar (13) passes through the lower flange (12) and is fixedly connected to the pile tip (16).

3. The anti-squeeze soil structure constructed by pipe piles on a large area of ​​silty soft soil base as claimed in claim 2, characterized in that: The axial steel bars (13) are horizontally connected to a plurality of steel bar rings (14); the axial steel bars (13) and the steel bar rings (14) are wrapped with a concrete wrapping layer (15) on their peripheries; the inner side of the concrete wrapping layer (15) is a drainage through hole (18); and the drainage through hole (18) is connected to the water inlet hole (17).

4. The anti-squeeze soil structure constructed by pipe piles on a large area of ​​silty soft soil base as claimed in claim 2, characterized in that: Fixed plates (22) are provided at both ends of the side plate (21); the fixed plates (22) are connected to the upper flange (11) and the lower flange (12) and penetrated by axial steel bars (13).

5. The anti-squeeze soil structure constructed by pipe piles on a large area of ​​muddy soft soil base as claimed in claim 4, characterized in that: The side of the side plate (21) is provided with a mounting groove (23), the bottom of the barb plate (24) is rotatably mounted on the outside of the mounting groove (23) via a rotating pin (26), and half of the barb plate (24) is located in the mounting groove (23).

6. The anti-squeeze soil structure constructed by pipe piles on a large area of ​​muddy soft soil base as claimed in claim 5, characterized in that: The bottom and top ends of the barb plate (24) are provided with inclined surfaces (25), the inclined surfaces (25) face the mounting groove (23), and when the barb plate (24) is rotated 60 degrees downward, the lower inclined surface (25) will abut against the mounting groove (23).

7. The anti-squeeze soil structure constructed by pipe piles on a large area of ​​muddy soft soil base as claimed in claim 1, characterized in that: The top surface of the cylinder body (31) is provided with a force-bearing plate (32), and the top surface of the force-bearing plate (32) is horizontally penetrated by a drainage groove (33).

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