A core-added mixing pile applied to soft soil foundation

Abstract

The utility model discloses a kind of core adding mixing piles applied to soft soil foundation, it is related to foundation treatment technical field, including positioning frame, locking block is installed on positioning frame, locking groove is opened in locking block;Still including reset spring leaf installed in locking groove, bracket rod is installed in locking groove, bracket rod bottom and reset spring leaf are abutted, locking block and bracket rod are all opened with the same size locking hole, quick plunger is inserted in locking hole, bracket rod is installed with inclined plane push rod, and positioning component, the utility model is positioned by the positioning component of design, when contacting positioning block below core adding pile, so that positioning block is extruded by pile body conical surface, drive elastic rod compression, adjust spring leaf deformation, different from traditional core adding pile, ensure in the pile body positioning process, whether the deviation of pile body diameter exists or soft soil foundation generates lateral pressure, can be positioned component's elastic adjustment and stepwise slope adhesion solution, realize core adding pile high-precision perpendicularity and center alignment.

Description

Technical Field

[0001] This utility model relates to the field of foundation treatment technology, specifically to a core-mixing pile used in soft soil foundations. Background Technology

[0002] In the field of engineering construction, soft soil foundations are widely distributed in coastal areas, alluvial plains, and areas surrounding some lakes. The unfavorable engineering characteristics of soft soil foundations, such as high compressibility, low shear strength, and high sensitivity, make them prone to excessive settlement, uneven settlement, and stability problems during construction, seriously threatening the safety and normal use of buildings. Traditional soft soil foundation treatment methods, such as surcharge preloading and replacement methods, have limitations in terms of treatment depth, effectiveness, and economy. Core-mixed soil piles, as a new type of composite foundation treatment technology, have emerged. They fully utilize the high strength of concrete core piles and the large lateral surface area of ​​cement mixing piles; working together, they effectively improve the bearing capacity of the foundation and reduce settlement, leading to their increasingly widespread application in various soft soil foundation projects.

[0003] In traditional core pile installation, the pile is first hoisted to the location directly above the soft soil foundation construction point using a crane, and then slowly lowered. During this process, construction workers rely solely on visual observation of the pile's tilt, or on rope traction and simple markers for adjustment. However, existing core piles lack a targeted verticality calibration and center alignment mechanism. When the crane experiences slight swaying during lowering, or when the soft soil is compressed by the soil mass, or when there is a diameter deviation in the pile, the pile's posture cannot be corrected in real time. This can easily lead to vertical deviation and center deviation from the preset point during pile insertion, weakening the synergistic effect with the mixing pile and reducing the effectiveness of foundation treatment. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a core-mixing pile for use in soft soil foundations.

[0005] This utility model provides a core-mixing pile for soft soil foundations, comprising a positioning frame with a locking block and a locking groove; a return spring plate installed in the locking groove, a support rod installed in the locking groove, the bottom of the support rod abutting against the return spring plate; locking holes of the same size are provided on both the locking block and the support rod, and quick-release pins are inserted into the locking holes; an inclined push rod is installed on the support rod, and the inclined push rod is in close contact with the quick-release pin, converting the axial force of the crane lifting into the radial retraction force of the quick-release pin through the inclined push rod, realizing automatic disassembly; and a positioning component installed on the positioning frame to ensure the verticality and center alignment of the core-mixing pile when it is inserted. Preferably, the positioning component includes an elastic rod, which is installed on the inner wall of the positioning frame, and a positioning block is installed at the end of the elastic rod away from the positioning frame.

[0006] Preferably, the contact surface between the positioning block and the core pile is a stepped slope, and an adjusting spring plate is sleeved on the elastic rod. One end of the adjusting spring plate is fixed to the positioning frame, and the other end is fixed to the positioning block. This is conducive to fitting the tapered surface of the core pile, which is wider at the top and narrower at the bottom, and facilitates compensation for the diameter deviation of the pile body through elastic adjustment.

[0007] Preferably, a top plate is installed on the support rod, and a lifting ring is installed on the top plate, which is conducive to the crane hoisting the support rod and facilitates the lifting and positioning of the core pile.

[0008] Preferably, a calibration rod is installed on the inner wall of the top plate, and a calibration frame is installed on the calibration rod, which is beneficial for detecting the verticality of the core pile when it is inserted and makes it easier to ensure that the center of the pile is aligned.

[0009] Preferably, a clamping telescopic rod is installed on the support rod, and a clamping block is installed on the clamping telescopic rod, which helps to press against the cone surface of the core pile, facilitates the fixation of the pile body and prevents tilting.

[0010] Preferably, the stepped slope of the positioning block is composed of multiple inclined planes spliced ​​together. Each inclined plane has the same angle as the cone surface of the core pile, which is conducive to segmented fitting of the cone surface of the pile body, improving positioning accuracy and reducing local gaps.

[0011] Preferably, the elastic rod is made of alloy material, and the surface of the adjusting spring plate is coated with a molybdenum disulfide lubricating layer, which helps to enhance the strength and durability of the elastic rod, reduce the frictional loss of the adjusting spring plate, and improve flexibility.

[0012] Compared with related technologies, the core-mixing pile for soft soil foundation provided by this utility model has the following beneficial effects: 1. This utility model, through its designed positioning component, ensures that when the core pile is lowered and contacts the positioning block, the positioning block is subjected to the compression of the pile's conical surface, which in turn causes the elastic rod to compress and the adjusting spring plate to deform. Unlike traditional core piles, this design ensures that during the pile positioning process, whether there is a deviation in the pile diameter or lateral pressure generated by the soft soil foundation, the elastic adjustment of the positioning component and the step-like slope can solve the problem, truly achieving high-precision verticality and center alignment of the core pile.

[0013] 2. This utility model utilizes a linkage structure of a reset spring plate, a quick-release pin, and an inclined push rod. When the crane lifts the support rod, the inclined push rod moves upward with the support rod and receives a reaction force from the inclined surface that is in contact with the quick-release pin. This causes the quick-release pin to radially exit the locking hole. Unlike traditional manual disassembly methods, this design ensures that during repeated use of the equipment, both the safety risks of high-altitude operations and the low efficiency of manual operation can be effectively avoided by the automated mechanical disassembly mechanism. It truly achieves fast, safe, and efficient equipment separation, greatly improving the disassembly efficiency and safety in soft soil foundation construction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall front structure of this utility model; Figure 3 This is a schematic diagram of the positioning component structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the locking block of this utility model; Figure 5 for Figure 1 Enlarged diagram corresponding to point A in the middle; Figure 6 for Figure 1 Enlarged diagram corresponding to point B in the middle.

[0015] The following are the labels in the diagram: 1. Positioning frame; 2. Locking block; 3. Locking groove; 4. Return spring plate; 5. Support rod; 6. Locking hole; 7. Quick-release pin; 8. Angled push rod; 9. Positioning component; 10. Elastic rod; 11. Positioning block; 12. Adjusting spring plate; 13. Top plate; 14. Lifting ring; 15. Calibration rod; 16. Calibration frame; 17. Clamping telescopic rod; 18. Clamping block. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0018] Please see Figure 1 - Figure 6 A core-mixing pile for soft soil foundation includes a positioning frame 1, a locking block 2 mounted on the positioning frame 1, and a locking groove 3 on the locking block 2; a return spring plate 4 installed in the locking groove 3, a support rod 5 installed in the locking groove 3, the bottom of the support rod 5 abutting against the return spring plate 4; locking holes 6 of the same size are opened on both the locking block 2 and the support rod 5, and quick-release pins 7 are inserted into the locking holes 6; an inclined push rod 8 is mounted on the support rod 5, and the inclined push rod 8 is in close contact with the quick-release pin 7. The inclined design of the inclined push rod 8 can effectively convert the axial force of the crane lifting into the radial withdrawal force of the quick-release pin 7. This structure, through mechanical transmission optimization, avoids the tedious operation of manual knocking in the traditional disassembly method, improves disassembly efficiency and safety, and realizes automatic disassembly; and a positioning component 9 installed on the positioning frame 1, which ensures the verticality and center alignment of the core-mixing pile when it is inserted.

[0019] The following describes some embodiments of this application in detail with reference to the accompanying drawings: The positioning component 9 includes an elastic rod 10, which is installed on the inner wall of the positioning frame 1. A positioning block 11 is installed at the end of the elastic rod 10 away from the positioning frame 1. Please see Figure 1 - Figure 3 Through the designed positioning component 9, when the core pile is lowered and contacts the positioning block 11, the positioning block 11 is subjected to the compression of the pile's conical surface, which in turn causes the elastic rod 10 to compress and the adjusting spring plate 12 to deform. The elastic rod 10 is made of high-strength alloy material, possessing excellent elastic deformation capability and fatigue resistance. Under long-term repeated compression conditions, the elastic rod 10 can quickly recover its initial shape, avoiding the attenuation of positioning accuracy due to plastic deformation. The molybdenum disulfide lubricating layer on the surface of the adjusting spring plate 12 can reduce frictional loss, allowing the positioning block 11 to flexibly reset after being subjected to force, avoiding the impact of jamming on positioning accuracy. Unlike traditional core piles, this design ensures that during the pile positioning process, whether there is a deviation in the pile diameter or lateral pressure from the soft soil foundation, it can be resolved by the elastic adjustment of the positioning component 9 and the stepped slope fit, truly achieving high-precision verticality and center alignment of the core pile.

[0020] In addition, the contact surface between the positioning block 11 and the core pile is a stepped slope. An adjusting spring plate 12 is sleeved on the elastic rod 10. One end of the adjusting spring plate 12 is fixed to the positioning frame 1, and the other end is fixed to the positioning block 11. The multi-segment inclined plane design of the stepped slope is adapted to the cone shape of the core pile, and can fit the pile body from different angles. Even if there are slight differences in the diameter of the pile body, the elastic action of the adjusting spring plate 12 can drive the positioning block 11 to adjust adaptively to ensure a tight fit. This is conducive to fitting the cone surface of the core pile, which is wider at the top and narrower at the bottom, and it is easy to compensate for the deviation of the pile body diameter through elastic adjustment.

[0021] Meanwhile, a top plate 13 is installed on the support rod 5, and a lifting ring 14 is installed on the top plate 13. The lifting ring 14 and the top plate 13 are connected by a high-strength welding process, which can stably withstand the load during the hoisting process. The top plate 13 provides a stable support for the top of the support rod 5, and at the same time provides an installation foundation for the calibration rod 15 and the lifting ring 14, ensuring that all components work together, which is conducive to the hoisting of the support rod 5 by the crane, and facilitates the lifting and positioning of the core pile. In this technical solution, such as Figure 1 - Figure 5 As shown, a calibration rod 15 is installed on the inner wall of the top plate 13, and a calibration frame 16 is installed on the calibration rod 15, which is beneficial for detecting the verticality of the core pile when it is inserted and for ensuring that the center of the pile is aligned; a clamping telescopic rod 17 is installed on the support rod 5, and a clamping block 18 is installed on the clamping telescopic rod 17, which is beneficial for pressing against the cone surface of the core pile, facilitating the fixation of the pile and preventing tilting.

[0022] The stepped slope of the positioning block 11 is composed of multiple inclined planes spliced ​​together. Each inclined plane has the same angle as the cone surface of the core pile, which is conducive to segmented fitting of the cone surface of the pile body, which facilitates improved positioning accuracy and reduced local gaps.

[0023] In addition, the elastic rod 10 is made of alloy material, and the surface of the adjusting spring plate 12 is coated with a molybdenum disulfide lubricating layer, which helps to enhance the strength and durability of the elastic rod 10, reduce the frictional loss of the adjusting spring plate 12, and improve flexibility.

[0024] The working principle of positioning component 9 is explained below: First, equipment installation and initial preparation: At the soft soil foundation construction site, construction personnel first clear debris from the work area and level the site to avoid affecting the stability of the positioning frame 1. Then, a crane is used to lift the positioning frame 1 to the designated position, with personnel assisting in guiding it during lowering to prevent collisions. After the positioning frame 1 is in place, a level is used for calibration, and the bottom support legs are adjusted to ensure it is level, laying the foundation for subsequent construction. Next, the locking block 2 is fixed to the preset position of the positioning frame 1 with bolts, ensuring that the locking groove 3 is vertically downward. Before installation, burrs and other impurities in the locking groove 3 are cleaned. Then, the return spring plate 4 is placed at the bottom of the groove, and after testing its elasticity, it is inserted into the support rod 5, making the bottom of the rod abut against the spring. Then, the quick-release pin 7 is passed through the locking hole 6 to lock the support rod 5 and the locking block 2. At the same time, an inclined push rod 8 is installed on the side of the support rod 5 and adjusted to fit tightly with the quick-release pin 7. In addition, an elastic rod 10 is fixed to the inner wall of the positioning frame 1 and a positioning block 11 is connected. After the adjusting spring plate 12 is fitted, its flexibility of movement is checked. A top plate 13 and a lifting ring 14 are installed on the top of the support rod 5. A calibration rod 15 and a calibration frame 16 are installed on the inner wall. A clamping telescopic rod 17 and a clamping block 18 are installed on the side. After the equipment is installed, an overall debugging is carried out to ensure that each component works normally.

[0025] Secondly, the core pile is positioned and calibrated: The crane lifts the core pile through the lifting ring 14 connected to the top plate 13 and moves it above the positioning frame 1. During the slow lowering process, the tapered surface of the core pile, wider at the top and narrower at the bottom, contacts the positioning block 11, squeezing the positioning block 11 and causing the elastic rod 10 to compress and the adjusting spring plate 12 to deform. The stepped slope of the positioning block 11 fits the tapered surface of the pile in sections, which can adaptively compensate for the deviation of the pile diameter and achieve precise horizontal alignment. When the top of the core pile approaches the calibration frame 16, the construction personnel judge the verticality by observing or using sensors to monitor the gap between the frame and the top of the pile. If there is a deviation, the angle is immediately adjusted by the crane, and at the same time, the clamping telescopic rod 17 is activated to drive the clamping block 18 to press against the tapered surface of the pile to prevent the core pile from tilting, thus completing the precise positioning.

[0026] Then, the core pile construction operation: After positioning and calibration, the mixing equipment is started. The existing mixing equipment is used, and the mixing head penetrates deep into the soft soil foundation to fully mix the soil and the solidifying agent. During construction, the positioning block 11 continuously adheres to the pile body on its slope, and the elastic rod 10 and the adjusting spring plate 12 adaptively adjust the positioning force according to the lateral pressure of the foundation. The calibration frame 16 monitors the verticality in real time, and any deviations are promptly fed back and fine-tuned through the crane. The clamping block 18 stabilizes the pile body by controlling the pressure to prevent tilting caused by mixing vibration. As mixing progresses, the core pile is gradually encased in the mixing pile body, forming a composite structure that effectively improves the bearing capacity of the foundation.

[0027] Finally, equipment disassembly and recovery: After construction, the crane lifts the support rod 5, and the inclined push rod 8 moves upward accordingly, converting the axial force into the radial withdrawal force of the quick-release pin 7, causing it to disengage from the locking hole 6. As the support rod 5 continues to rise, the return spring plate 4 rebounds to assist disassembly, and it is finally hoisted to the designated location for maintenance. The positioning frame 1 and locking block 2 do not need to be disassembled and can be directly used for the next pile foundation construction, reducing equipment disassembly and assembly time, improving construction efficiency, reducing costs, and achieving a highly efficient cycle for core mixing pile construction on soft soil foundations.

[0028] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A core mixing pile for use in soft soil foundation, comprising a positioning frame (1), wherein a locking block (2) is installed on the positioning frame (1), and a locking groove (3) is provided on the locking block (2); Its features are, Also includes: A return spring plate (4) is installed in the locking groove (3). A support rod (5) is installed in the locking groove (3). The bottom of the support rod (5) abuts against the return spring plate (4). Locking holes (6) of the same size are opened on both the locking block (2) and the support rod (5). A quick-release pin (7) is inserted into the locking hole (6). An inclined push rod (8) is installed on the support rod (5). The inclined push rod (8) is in close contact with the quick-release pin (7). The axial force of the crane lifting is converted into the radial withdrawal force of the quick-release pin (7) through the inclined push rod (8), thereby realizing automatic disassembly. The positioning component (9) installed on the positioning frame (1) ensures the verticality and center alignment of the core pile during insertion.

2. A core-mixing pile for soft soil foundations according to claim 1, characterized in that: The positioning component (9) includes an elastic rod (10), which is installed on the inner wall of the positioning frame (1). A positioning block (11) is installed at the end of the elastic rod (10) away from the positioning frame (1).

3. A core-mixing pile for soft soil foundations according to claim 2, characterized in that: The contact surface between the positioning block (11) and the core pile is a stepped slope. An adjusting spring plate (12) is sleeved on the elastic rod (10). One end of the adjusting spring plate (12) is fixed to the positioning frame (1), and the other end is fixed to the positioning block (11).

4. A core-mixing pile for soft soil foundations according to claim 1, characterized in that: A top plate (13) is installed on the support rod (5), and a lifting ring (14) is installed on the top plate (13).

5. A core-mixing pile for soft soil foundations according to claim 4, characterized in that: A calibration rod (15) is installed on the inner wall of the top plate (13), and a calibration frame (16) is installed on the calibration rod (15).

6. A core-mixing pile for soft soil foundations according to claim 4, characterized in that: A clamping telescopic rod (17) is installed on the support rod (5), and a clamping block (18) is installed on the clamping telescopic rod (17).

7. A core-mixing pile for soft soil foundations according to claim 3, characterized in that: The stepped slope of the positioning block (11) is composed of multiple inclined planes spliced ​​together, and the angle of each inclined plane is consistent with the cone surface of the core pile.

8. A core-mixing pile for soft soil foundations according to claim 3, characterized in that: The elastic rod (10) is made of alloy material, and the surface of the adjusting spring plate (12) is coated with a molybdenum disulfide lubricating layer.

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