Special-shaped uplift square pile
By designing irregularly shaped pull-out square piles, utilizing the irregularly shaped structure of staggered pull-out sections and variable diameter sections, along with grouting and anchor bolt technology, the problems of high material costs, difficult transportation, and insufficient pull-out strength were solved, achieving a highly efficient pull-out resistance effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-04-07
AI Technical Summary
In existing technologies, increasing the pile length or diameter to improve the pull-out strength of pile foundations can easily lead to increased material costs and greater difficulty in transportation and hoisting.
The design adopts an irregularly shaped tensile-resistant square pile, which includes staggered tensile-resistant sections and variable-diameter sections. It is fixed in the foundation pit by anchoring components, and concrete slurry is injected using grouting equipment to increase the contact area between the tensile-resistant section and the soil. Combined with anchor rods inserted into deep soil to form a barbed structure, the tensile strength is improved.
This reduces the transportation and hoisting costs of the piles, enhances their pull-out resistance, and improves the overall bearing capacity of the pile foundation.
Smart Images
Figure CN224092475U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pile foundation technology, and in particular to a special-shaped pull-out square pile. Background Technology
[0002] In building pile foundation engineering, tension piles are a commonly used pile type and are widely used in underground space development projects. As underground space development becomes deeper and deeper, the requirements for tension bearing capacity are also becoming higher and higher.
[0003] Currently, in order to improve the pull-out strength of pile foundations, the common approach is to increase the pile length or diameter. However, improving the pull-out strength of pile foundations in this way can easily lead to increased material costs. This not only increases the volume and weight of the piles, but also increases transportation costs, transportation difficulties, and hoisting difficulties, which has its drawbacks. Utility Model Content
[0004] To address the issue that increasing pile length or diameter can easily lead to increased costs for pile foundations, this application provides a non-circular, tension-resistant square pile.
[0005] The technical solution for a non-shaped, tension-resistant square pile provided in this application is as follows:
[0006] An irregularly shaped tensile-resistant square pile includes a pile body and an anchoring assembly. The anchoring assembly is used to vertically anchor the pile body in a foundation pit. The pile body includes multiple tensile-resistant sections and multiple variable-diameter sections. The multiple tensile-resistant sections and multiple variable-diameter sections are arranged alternately along the length direction of the tensile-resistant sections. The cross-section of the tensile-resistant section is larger than the cross-section of the variable-diameter section.
[0007] By adopting the above technical solution, after workers dig the foundation pit on the ground using professional equipment, they use hoisting equipment to bury the pile in the foundation pit, and then use anchoring components to fix the pile in the foundation pit. Due to the difference in cross-section between the tensile section and the variable diameter section, a step will be formed at the connection between the tensile section and the variable diameter section. The soil surrounding the variable diameter section will increase the overall tensile strength of the pile. At the same time, the variable diameter section will reduce the overall weight of the pile, which will help reduce the transportation cost and hoisting difficulty of the pile, and at the same time reduce the cost of consumables required for the pile.
[0008] Optionally, the anchoring assembly includes a grouting pipe that passes sequentially through the pull-out section and the reducing section. The pull-out section is provided with a grouting pipe that communicates with the grouting pipe, and one end of the grouting pipe facing away from the grouting pipe extends to the outer wall of the pull-out section.
[0009] By adopting the above technical solution, after the pile body is hoisted into the foundation pit and settles naturally for a period of time, workers inject concrete slurry into the grouting pipe through grouting equipment. The concrete slurry will flow along the grouting pipe to the slurry flow pipe, and then flow out from the slurry flow pipe to the outer wall of the pull-out part. The concrete slurry flowing out from the slurry flow pipe will expand into the deep soil and gradually solidify, thereby increasing the contact area between the pull-out part and the deep soil, thereby improving the pull-out performance of the pull-out part, and thus improving the overall pull-out strength of the pile body.
[0010] Optionally, the connection between the slurry pipe and the outer wall of the pull-out section is located at the top end face of the pull-out section, and the connection between the slurry pipe and the top of the pull-out section is close to the bottom of the variable diameter section.
[0011] By adopting the above technical solution, the concrete slurry flowing out of the grout pipe will solidify at the connection between the bottom of the pull-out section and the diameter-changing section. The solidified concrete slurry will solidify at the step formed between the pull-out section and the diameter-changing section, thereby reducing the possibility of relative sliding between the solidified concrete slurry and the pull-out section.
[0012] Optionally, an exhaust pipe is provided inside the grouting pipe, and a bend is provided at the top of the exhaust pipe, extending outside the grouting pipe. A leak-proof ring pipe is coaxially provided inside the exhaust pipe, and an exhaust plate is coaxially provided at the top of the leak-proof ring pipe. Several ventilation holes are vertically opened on the exhaust plate. A locking rod is slidably provided on the exhaust plate, and an anti-falling rod and a float are provided on the locking rod. The exhaust plate is located between the anti-falling rod and the float, and the anti-falling rod is located above the float. The inner diameter of the leak-proof ring pipe gradually decreases along the direction from the float to the anti-falling rod, and the float is used to abut against the circumferential inner wall of the leak-proof ring pipe.
[0013] By adopting the above technical solution, when workers inject concrete into the grouting pipe through the grouting equipment, the gas at the bottom of the grouting pipe will be discharged to the atmosphere through the exhaust pipe, the leak-proof ring pipe, the vent hole, and finally through the bend pipe. Concrete slurry will also gradually rise in the exhaust pipe until it pushes the float to rise. The float will gradually block the leak-proof ring pipe, thereby reducing the possibility of an empty pipe at the bottom of the grouting pipe. At this time, the grouting pipe is full of concrete slurry. As the concrete slurry continues to be injected, it will be discharged through the grout flow pipe, thus ensuring that there is slurry discharged from each grout flow pipe, which is conducive to further improving the pull-out strength of the pile.
[0014] Optionally, a reinforcing pipe is provided inside the pile body, the axis of the reinforcing pipe is parallel to the grouting pipe, and multiple anchor pipes are connected to the reinforcing pipe. The multiple anchor pipes are arranged along the axial direction of the reinforcing pipe, and one end of the anchor pipe facing away from the reinforcing pipe is connected to the outer wall of the pile body. An anchor rod is slidably provided on the anchor pipe, and a sealing ring is sleeved on the anchor rod.
[0015] By adopting the above technical solution, after the pile body has settled naturally in the foundation pit for a period of time, the workers use a pressurization device to inject a certain pressure into the reinforcing pipe. As the pressure inside the reinforcing pipe increases, it will push the anchor rod to slide. The anchor rod will gradually slide and insert into the deep soil, thereby improving the pull-out strength of the pile body.
[0016] Optionally, the anchor pipe corresponds one-to-one with the variable diameter section, the anchor pipe is pre-embedded in the pull-out section, and the connection between the anchor pipe and the pull-out section is located at the top end face of the pull-out section.
[0017] By adopting the above technical solution, after the anchor rod is inserted into the deep soil, the concrete slurry flowing out of the grout pipe will fill the area around the anchor rod. After the concrete slurry solidifies, the anchor rod is embedded in the solidified concrete slurry, thereby improving the structural strength of the solidified concrete slurry and further improving the pull-out strength of the pile.
[0018] Optionally, there is an angle between the axial direction of the anchor pipe and the length direction of the pull-out resisting part.
[0019] By adopting the above technical solution, when the anchor rod slides out of the anchor pipe, a barb structure will be formed between the part of the anchor rod that is not filled with concrete slurry and the pull-out part, thereby further improving the pull-out strength of the pile.
[0020] Optionally, both the pull-out resisting portion and the variable diameter portion have square cross-sections.
[0021] By adopting the above technical solutions, it is beneficial to improve the bearing capacity of the pile.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. After workers have dug the foundation pit on the ground using specialized equipment, they use hoisting equipment to bury the pile in the pit and then use anchoring components to fix the pile in the pit. Due to the difference in cross-section between the tensile section and the variable diameter section, a step will be formed at the connection between the tensile section and the variable diameter section. The soil surrounding the variable diameter section will increase the overall tensile strength of the pile. At the same time, the variable diameter section will reduce the overall weight of the pile, which will help reduce the transportation cost and hoisting difficulty of the pile, and at the same time reduce the cost of consumables required for the pile.
[0024] 2. After the pile body is hoisted into the foundation pit and settles naturally for a period of time, the workers inject concrete slurry into the grouting pipe through the grouting equipment. The concrete slurry will flow along the grouting pipe to the slurry flow pipe, and then flow out from the slurry flow pipe to the outer wall of the pull-out part. The concrete slurry flowing out from the slurry flow pipe will spread into the deep soil and gradually solidify, thereby increasing the contact area between the pull-out part and the deep soil, thereby improving the pull-out performance of the pull-out part, and thus improving the overall pull-out strength of the pile body;
[0025] 3. After the anchor rod is inserted into the deep soil, the concrete slurry flowing from the grout pipe will fill the area around the anchor rod. After the concrete slurry solidifies, the anchor rod is embedded in the solidified concrete slurry, thereby improving the structural strength of the solidified concrete slurry and further improving the pull-out strength of the pile. Attached Figure Description
[0026] Figure 1 This is a structural schematic diagram of an embodiment of this application.
[0027] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the grouting pipe, the grouting pipe, and the pull-out resistance part.
[0028] Figure 3 yes Figure 2 Enlarged view of section A.
[0029] Figure 4 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the anchor bolt, anchor pipe, and pull-out resisting part.
[0030] Explanation of reference numerals in the attached drawings: 1. Pile body; 101. Pull-out section; 102. Variable diameter section; 2. Anchoring assembly; 21. Grouting pipe; 22. Grouting pipe; 3. Vent pipe; 4. Bend pipe; 5. Leak-proof ring pipe; 6. Vent plate; 7. Vent hole; 8. Locking rod; 9. Anti-falling rod; 10. Float ball; 11. Reinforcing pipe; 12. Anchor pipe; 13. Anchor rod; 14. Sealing ring. Detailed Implementation
[0031] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.
[0032] This application discloses an irregularly shaped pull-out square pile.
[0033] Reference Figure 1 and Figure 2 A type of non-extension-resistant square pile includes a pile body 1 and an anchoring component 2. The anchoring component 2 is used to vertically anchor the pile body 1 in the foundation pit. The pile body 1 includes multiple tension-resistant parts 101 and multiple diameter-changing parts 102. The cross-sections of the tension-resistant parts 101 and the diameter-changing parts 102 are all square.
[0034] Reference Figure 1 The tensile section 101 and the diameter-changing section 102 are precast by integral concrete casting. Multiple tensile sections 101 and multiple diameter-changing sections 102 are staggered along the length direction of the tensile section 101. The cross-section of the tensile section 101 is larger than the cross-section of the diameter-changing section 102. Both ends of the pile body 1 in the length direction are tensile sections 101.
[0035] Reference Figure 2The anchoring assembly 2 includes a grouting pipe 21, which passes through the pull-out section 101 and the diameter-changing section 102 in sequence. A grouting pipe 22, which communicates with the grouting pipe 21, is pre-embedded on the pull-out section 101. One end of the grouting pipe 22 facing away from the grouting pipe 21 extends to the outer wall of the pull-out section 101. The connection between the grouting pipe 22 and the outer wall of the pull-out section 101 is located at the top end face of the pull-out section 101. The connection between the grouting pipe 22 and the top of the pull-out section 101 is close to the bottom of the diameter-changing section 102.
[0036] A step is formed between the pull-out section 101 and the diameter-changing section 102, which are precast by integral concrete casting on the pile body 1. This reduces the consumption of materials in the diameter-changing section 102 of the pile body 1 and reduces the overall weight of the pile body 1.
[0037] After the workers hoist the pile 1 into the foundation pit using hoisting equipment, the pile 1 settles naturally for a period of time. Then, the workers inject concrete slurry into the grouting pipe 21 using grouting equipment. The concrete slurry flowing into the grouting pipe 21 will flow out through the grouting pipe 22. The concrete slurry flowing out through the grouting pipe 22 will solidify at the step between the top of the pull-out section 101 and the bottom of the diameter-changing section 102, thereby improving the overall pull-out strength of the pile 1.
[0038] Reference Figure 2 and Figure 3 An exhaust pipe 3 is welded inside the grouting pipe 21. A bend 4 is welded to the top of the exhaust pipe 3. The bend 4 extends to the outside of the grouting pipe 21. A leak-proof ring pipe 5 is coaxially welded inside the exhaust pipe 3. An exhaust plate 6 is coaxially welded to the top of the leak-proof ring pipe 5. Several ventilation holes 7 are vertically opened on the exhaust plate 6. The ventilation holes 7 are evenly distributed on the exhaust plate 6.
[0039] Reference Figure 3 A locking rod 8 is slidably connected to the exhaust plate 6 on the same axis. A fall arresting rod 9 and a float 10 are welded to the locking rod 8. The exhaust plate 6 is located between the fall arresting rod 9 and the float 10. The fall arresting rod 9 is located above the float 10. The inner diameter of the anti-leakage ring pipe 5 gradually decreases along the direction from the float 10 to the fall arresting rod 9. The float 10 is used to abut against the circumferential inner wall of the anti-leakage ring pipe 5.
[0040] When workers inject concrete slurry into the grouting pipe 21 through the grouting equipment, as the concrete slurry gradually flows into the grouting pipe 21, the gas at the bottom of the grouting pipe 21 will be discharged to the atmosphere in the order of exhaust pipe 3, leak-proof ring pipe 5, vent hole 7 and bend pipe 4. The bottom of the exhaust pipe 3 will also gradually flow into the concrete slurry until the concrete slurry entering the exhaust pipe 3 contacts the float ball 10.
[0041] At this time, the weight of the float 10 will be less than its buoyancy, and the float 10 will gradually rise. The rising float 10 will gradually block the leak-proof ring pipe 5. At this time, the exhaust pipe 3 can no longer circulate gas, thereby reducing the possibility of air columns appearing at the bottom of the grouting pipe 21. At the same time, as the concrete slurry continues to be injected, the concrete slurry filling the grouting pipe 21 will be discharged into the deep soil through the grouting pipe 22.
[0042] Reference Figure 1 and Figure 4 A reinforcing pipe 11 is pre-embedded inside the pile body 1. The axis of the reinforcing pipe 11 is parallel to the grouting pipe 21. Multiple anchor pipes 12 are connected to the reinforcing pipe 11. The anchor pipes 12 are pre-embedded on the pull-out part 101. The multiple anchor pipes 12 are arranged along the axis of the reinforcing pipe 11. The end of the anchor pipe 12 facing away from the reinforcing pipe 11 is connected to the outer wall of the pile body 1.
[0043] Reference Figure 1 and Figure 4 Anchor pipe 12 corresponds one-to-one with diameter-changing part 102. The connection between anchor pipe 12 and pull-out part 101 is located at the top end face of pull-out part 101. There is an angle between the axial direction of anchor pipe 12 and the length direction of pull-out part 101. An anchor rod 13 is coaxially slidably connected to anchor pipe 12. A sealing ring 14 is sleeved on anchor rod 13. The sealing ring 14 abuts against the circumferential inner sidewall of anchor pipe 12.
[0044] After the pile body 1 has settled naturally for a period of time, the workers use a pressurizing device to inject a medium of a certain pressure into the reinforcing pipe 11. The medium can be concrete slurry. The increased pressure in the reinforcing pipe 11 will push the anchor rod 13 to slide. The anchor rod 13 will gradually slide and insert into the deep soil. A barbed structure will be formed between the sliding anchor rod 13 and the pull-out part 101.
[0045] As the concrete slurry flowing out of the grout pipe 22 solidifies, some of the anchor rods 13 will be surrounded by concrete slurry. The anchor rods 13 will strengthen the structural strength of the solidified concrete slurry, thereby improving the pull-out strength of the pile body 1.
[0046] The implementation principle of an irregular pull-out square pile in this application embodiment is as follows: a step is formed between the pull-out part 101 and the diameter-changing part 102, which are prefabricated by integral concrete casting on the pile body 1. This reduces the consumption of materials in the diameter-changing part 102 of the pile body 1 and reduces the overall weight of the pile body 1.
[0047] After the workers hoist the pile 1 into the foundation pit using hoisting equipment, the pile 1 settles naturally for a period of time. Then, the workers inject concrete slurry into the grouting pipe 21 using grouting equipment. The concrete slurry flowing into the grouting pipe 21 will flow out through the grouting pipe 22. The concrete slurry flowing out through the grouting pipe 22 will solidify at the step between the top of the pull-out section 101 and the bottom of the diameter-changing section 102, thereby improving the overall pull-out strength of the pile 1.
[0048] When workers inject concrete slurry into the grouting pipe 21 through the grouting equipment, as the concrete slurry gradually flows into the grouting pipe 21, the gas at the bottom of the grouting pipe 21 will be discharged to the atmosphere in the order of exhaust pipe 3, leak-proof ring pipe 5, vent hole 7 and bend pipe 4. The bottom of the exhaust pipe 3 will also gradually flow into the concrete slurry until the concrete slurry entering the exhaust pipe 3 contacts the float ball 10.
[0049] At this time, the weight of the float 10 will be less than its buoyancy, and the float 10 will gradually rise. The rising float 10 will gradually block the leak-proof ring pipe 5. At this time, the exhaust pipe 3 can no longer circulate gas, thereby reducing the possibility of air columns appearing at the bottom of the grouting pipe 21. At the same time, as the concrete slurry continues to be injected, the concrete slurry filling the grouting pipe 21 will be discharged into the deep soil through the grouting pipe 22.
[0050] After the pile body 1 has settled naturally for a period of time, the workers use a pressurizing device to inject a medium of a certain pressure into the reinforcing pipe 11. The medium can be concrete slurry. The increased pressure in the reinforcing pipe 11 will push the anchor rod 13 to slide. The anchor rod 13 will gradually slide and insert into the deep soil. A barbed structure will be formed between the sliding anchor rod 13 and the pull-out part 101.
[0051] As the concrete slurry flowing out of the grout pipe 22 solidifies, some of the anchor rods 13 will be surrounded by concrete slurry. The anchor rods 13 will strengthen the structural strength of the solidified concrete slurry, thereby improving the pull-out strength of the pile body 1.
[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A non-circular, tension-resistant square pile, characterized in that: The system includes a pile body (1) and an anchoring assembly (2). The anchoring assembly (2) is used to vertically anchor the pile body (1) in the foundation pit. The pile body (1) includes multiple pull-out sections (101) and multiple diameter-changing sections (102). The multiple pull-out sections (101) and multiple diameter-changing sections (102) are arranged alternately along the length direction of the pull-out sections (101). The cross-section of the pull-out section (101) is larger than the cross-section of the diameter-changing section (102).
2. The irregular-shaped tensile-resistant square pile according to claim 1, characterized in that: The anchoring assembly (2) includes a grouting pipe (21), which passes through the pull-out resistant portion (101) and the variable diameter portion (102) in sequence. The pull-out resistant portion (101) is provided with a grout flow pipe (22) that communicates with the grouting pipe (21). One end of the grout flow pipe (22) facing away from the grouting pipe (21) extends to the outer wall of the pull-out resistant portion (101).
3. The irregular-shaped tensile-resistant square pile according to claim 2, characterized in that: The connection between the slurry pipe (22) and the outer wall of the pull-out portion (101) is located at the top end face of the pull-out portion (101), and the connection between the slurry pipe (22) and the top of the pull-out portion (101) is close to the bottom of the variable diameter portion (102).
4. The irregular-shaped tensile-resistant square pile according to claim 2, characterized in that: An exhaust pipe (3) is provided inside the grouting pipe (21). A bend (4) is provided at the top of the exhaust pipe (3), and the bend (4) extends to the outside of the grouting pipe (21). A leak-proof ring pipe (5) is coaxially provided inside the exhaust pipe (3). An exhaust plate (6) is coaxially provided at the top of the leak-proof ring pipe (5). Several ventilation holes (7) are vertically opened on the exhaust plate (6). A locking rod is coaxially slidably provided on the exhaust plate (6). 8) The locking rod (8) is provided with a fall arresting rod (9) and a float (10). The exhaust plate (6) is located between the fall arresting rod (9) and the float (10). The fall arresting rod (9) is located above the float (10). The inner diameter of the leak-proof ring pipe (5) gradually decreases along the direction from the float (10) to the fall arresting rod (9). The float (10) is used to abut against the circumferential inner wall of the leak-proof ring pipe (5).
5. A non-circular, tension-resistant square pile according to claim 3, characterized in that: A reinforcing pipe (11) is provided inside the pile body (1). The axis of the reinforcing pipe (11) is parallel to the grouting pipe (21). Multiple anchor pipes (12) are connected to the reinforcing pipe (11). The multiple anchor pipes (12) are arranged along the axis of the reinforcing pipe (11). One end of the anchor pipe (12) facing away from the reinforcing pipe (11) is connected to the outer wall of the pile body (1). An anchor rod (13) is slidably provided on the anchor pipe (12) on the same axis. A sealing ring (14) is sleeved on the anchor rod (13).
6. A non-circular, tension-resistant square pile according to claim 5, characterized in that: The anchor pipe (12) corresponds one-to-one with the variable diameter part (102). The anchor pipe (12) is pre-embedded in the pull-out part (101). The connection between the anchor pipe (12) and the pull-out part (101) is located on the top end face of the pull-out part (101).
7. A non-circular, tension-resistant square pile according to claim 6, characterized in that: There is an angle between the axial direction of the anchor pipe (12) and the length direction of the pull-out resisting part (101).
8. A non-circular, tension-resistant square pile according to claim 1, characterized in that: Both the pull-out section (101) and the variable diameter section (102) have square cross-sections.