Device and method for pouring imitated root pile under soft foundation
By using a tree root pile structure combining steel round sleeves and square sleeves on weak foundations, using technologies such as expanded concrete and auger, the problem of low bearing capacity of weak foundations is solved, and the bearing capacity and stability of the foundation is improved , reduces foundation settlement and deformation, and is suitable for complex geological conditions.
Patent Information
- Application Number
- CN202411272214.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2024-12-13
AI Technical Summary
When casting piles on weak foundations, the foundation bearing capacity is low, resulting in excessive foundation settlement, affecting the stability and safety of the building, and uneven settlement may lead to cracks and tilts in the building.
The imitation tree root pile structure is adopted that combines steel round sleeves and steel square sleeves. Expanded concrete is poured through a high-pressure grouting machine to form a tree root structure, and the friction and bearing capacity between the pile body and the soil are used to improve the foundation strength. and stability, and construction is carried out through an auger and puller to avoid structural bending moment and excessive depth.
It improves the bearing capacity and stability of the foundation, reduces the settlement and deformation of the foundation, prevents soil landslides and collapses, and is suitable for various weak foundations, with simple construction and little impact on the environment.
Smart Images
Figure CN119121896A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of enhancing the anti-lifting and bearing capacity of pile bodies under soft foundations, namely enhancing the strength of pile bodies, and in particular to a method for casting tree root-like piles under soft foundations. Background Art
[0002] When pouring piles on soft foundations, many problems will be faced. Due to the low bearing capacity of soft foundations, they may not be able to bear the weight of buildings or structures, resulting in excessive foundation settlement, affecting the stability and safety of the building. In addition, soft foundations may also have uneven settlement, causing cracks, tilting and other problems in buildings. For example, in some construction projects in coastal areas or by rivers and lakes, due to the uneven settlement of soft foundations, serious cracks appear in buildings, even affecting their normal use. Therefore, the necessity of using imitation tree root piles is highlighted. The working principle of imitation tree root piles is mainly to use the friction between the pile body and the soil and the bearing capacity of the pile end to improve the strength and stability of the foundation. The shape and structure of the pile body are similar to tree roots, with a large surface area and branches, which can better combine with the soil and increase the friction between the pile body and the soil. At the same time, the pile end can penetrate into the harder soil layer to improve the bearing capacity of the pile body. Summary of the invention
[0003] The present invention provides a device and method for casting tree root-like piles under a soft foundation. The steel round sleeve described in this method has evenly opened openings on both sides for inserting a steel square sleeve. The concrete structure cast in the steel round sleeve serves as a "stump", and the concrete structure cast in the steel square sleeve serves as a "root". During the grouting process, the lower side of the steel square sleeve is not closed, and the slurry displaces the soft soil and expands outward, thereby increasing the volume of the "root" and preventing the formed "root" from being destroyed due to excessive bending moment. After the entire structure is formed, a structure in the shape of a tree stump is formed, and the friction between the pile body and the soil body and the bearing capacity of the pile end are used to improve the strength and stability of the foundation.
[0004] In order to realize the above technical features, the object of the present invention is achieved as follows: a device for casting tree root-like piles under a soft foundation, comprising a steel round sleeve, the side of the steel round sleeve is evenly opened, the opening is used to drive a steel square sleeve, a limiting steel plate is welded on one side of the steel square sleeve, and expansion concrete is poured into the steel square sleeve by a high-pressure grouting machine to form a tree root-like concrete structure; Also included is a puller for pulling out the steel square sleeve, which pulls out the sleeve by engaging a clip on the steel square sleeve.
[0005] One side of the steel square sleeve is not closed, and during the grouting process, the slurry will flow in the direction where the steel square sleeve is not closed, expanding the volume of the structure; at the same time, there are three limiting steel plates on the edge of the steel square sleeve to prevent the steel square sleeve from being driven too deep into the soil. Concave buckles are designed on both sides of the limiting steel plates, and then it can be pulled out of the soil under the action of the puller.
[0006] The high-pressure grouting machine is used to convey expansive concrete to provide grouting pressure to make the slurry material and soft soil more compact. It also includes auger drills used for drilling holes. The auger drill excavates excess soil through spiral blades during the excavation process.
[0007] A method for casting simulated tree root piles under a soft foundation, the method is implemented by using the device for casting simulated tree root piles under a soft foundation, and comprises the following steps: Step 1, material preparation, prepare steel round sleeve, steel square sleeve, expansive concrete, limit steel plate, clip, high pressure grouting machine, auger, grouting pipe and puller; Step 2, site preparation, clean and level the soft foundation to ensure the safety and stability of the construction site, and determine the location and spacing of the simulated tree root piles according to the design requirements; Step 3, use a spiral drill to drill holes in the soft foundation. The diameter and depth of the holes should be determined according to the design requirements. During the drilling process, the steel round sleeve is installed. During the whole process, attention should be paid to controlling the verticality and diameter of the holes to ensure the quality of the pile body. Step 4. After the steel round sleeve is installed, drive the steel square sleeve into the opening on the side of the steel round sleeve until the limiting steel plate supports the side of the steel round sleeve, and clean the excess soil in the steel square sleeve; Step 5, prepare the high-pressure grouting machine, connect the grouting pipe, and pour the expansive concrete into the steel square sleeve from bottom to top. The steel square sleeve should be pulled out while grouting; Step 6, after the grouting of the steel square sleeve is completed, quickly start grouting into the steel round sleeve, and pull out the steel round sleeve while grouting; Step 7, after grouting is completed, vibrate and add fluid.
[0008] Beneficial effects of the present invention: 1. The branch structure of the tree root-simulating pile in the present invention can be closely integrated with the surrounding soil, increasing the contact area between the pile and the soil, thereby improving the bearing capacity of the foundation.
[0009] 2. The anchoring effect of the branches in the present invention can effectively resist the load of the superstructure and reduce the settlement and deformation of the foundation.
[0010] 3. The anchoring structure formed by the pile body and branches in the present invention can limit the lateral displacement and sliding of the soil and improve the stability of the foundation. For projects such as slopes and embankments in soft foundations, the tree root pile reinforcement technology can effectively prevent landslides and collapses of the soil.
[0011] 4. The tree root piles of the present invention can be designed and constructed according to different geological conditions, and are suitable for various soft foundations, such as silt, muddy soil, silt, sandy soil, etc. For areas with complex geological conditions, the tree root pile reinforcement technology can provide an effective solution.
[0012] 5. The construction process of the tree root pile imitation of the present invention is relatively simple and can be constructed using conventional construction equipment.
[0013] 6. The tree root pile reinforcement technology of the present invention does not require a large amount of earth excavation and backfilling, and has little impact on the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0015] Figure 1 This is a front view of the pile structure of the present invention. Figure 2 It is a side view of the pile structure of the present invention.
[0016] Figure 3 It is a schematic diagram of the pile body forming structure of the present invention.
[0017] Figure 4 It is a schematic diagram of the steel square sleeve of the present invention.
[0018] Figure 5 It is a side view of the steel square sleeve and the limiting steel plate of the present invention.
[0019] In the figure: steel round sleeve 1, steel square sleeve 2, expansive concrete 3, limiting steel plate 4, and buckle 5. DETAILED DESCRIPTION
[0020] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.
[0021] Embodiment 1: like Figure 1-5As shown, a device for casting tree root-like piles under a weak foundation includes a steel round sleeve 1, the side of the steel round sleeve 1 is evenly opened, and the opening is used to drive a steel square sleeve 2, a limiting steel plate 4 is welded on one side of the steel square sleeve 2, and an expansive concrete 3 is poured into the steel square sleeve 2 by a high-pressure grouting machine to form a tree root-like concrete structure; it also includes a puller for pulling out the steel square sleeve 2, and the sleeve is pulled out by engaging the buckle 5 on the steel square sleeve 2. The device of the present invention can be used to cast tree root-like piles, so that the branch structure of the tree root-like pile can be closely combined with the surrounding soil, increasing the contact area between the pile body and the soil body, thereby improving the bearing capacity of the foundation.
[0022] Furthermore, one side of the steel square sleeve 2 is not closed, and during the grouting process, the slurry will flow in the direction where the steel square sleeve 2 is not closed, thereby expanding the volume of the structure; at the same time, there are three limiting steel plates 4 on the edge of the steel square sleeve 2 to prevent the steel square sleeve 2 from being driven too deep into the soil, and concave buckles 5 are designed on both sides of the limiting steel plates 4, so that it can be pulled out of the soil under the action of the puller.
[0023] Furthermore, the high-pressure grouting machine is used to deliver the expansive concrete 3 to provide grouting pressure to make the slurry material and the soft soil more compact. Furthermore, it also includes an auger drill for drilling, and the excess soil is sent out by the spiral blades during the excavation process of the auger drill.
[0024] Furthermore, the puller fastens the concave buckle 5 on the limiting steel plate 4 of the steel square sleeve 2 to pull out the steel square sleeve 2.
[0025] Embodiment 2: A method for casting simulated tree root piles under a soft foundation, the method is implemented by using the device for casting simulated tree root piles under a soft foundation, and comprises the following steps: Step 1, material preparation, prepare steel round sleeve 1, steel square sleeve 2, expansion concrete 3, limit steel plate 4, buckle 5, high-pressure grouting machine, spiral drill, grouting pipe and puller; Step 2, site preparation, clean and level the soft foundation to ensure the safety and stability of the construction site, and determine the location and spacing of the simulated tree root piles according to the design requirements; Step 3, use a spiral drill to drill holes in the soft foundation. The diameter and depth of the holes should be determined according to the design requirements. During the drilling process, the steel round sleeve 1 is installed. During the whole process, attention should be paid to controlling the verticality and the size of the hole diameter to ensure the quality of the pile body; Step 4, after the steel round sleeve 1 is installed, the steel square sleeve 2 is driven into the opening on the side of the steel round sleeve 1 until the limiting steel plate 4 supports the side of the steel round sleeve 1, and the excess soil in the steel square sleeve 2 is cleaned; Step 5, prepare a high-pressure grouting machine, connect the grouting pipe, and pour the expansive concrete 3 into the steel square sleeve 2 from bottom to top, and pull out the steel square sleeve 2 while grouting; Step 6, after the grouting of the steel square sleeve 2 is completed, the grouting is quickly started into the steel round sleeve 1, and the steel round sleeve 1 is pulled out while the grouting is being performed; Step 7, after grouting is completed, vibrate and add fluid.
Claims
1. A device for pouring simulated tree root piles under soft foundation, characterized in that: It comprises a steel round sleeve (1), the side of the steel round sleeve (1) is evenly opened, the opening is used to drive a steel square sleeve (2), a limiting steel plate (4) is welded to one side of the steel square sleeve (2), and expansion concrete (3) is poured into the steel square sleeve (2) by a high-pressure grouting machine to form a tree root-shaped concrete structure; It also includes a puller for pulling out the steel square sleeve (2), and the sleeve is pulled out by engaging a buckle (5) on the steel square sleeve (2).
2. The device for pouring simulated tree root piles under soft foundation according to claim 1, characterized in that: One side of the steel square sleeve (2) is not closed, and during the grouting process, the slurry will flow in the direction where the steel square sleeve (2) is not closed, thereby expanding the volume of the structure; at the same time, three limiting steel plates (4) are provided on the edge of the steel square sleeve (2) to prevent the steel square sleeve (2) from being driven too deep into the soil, and concave buckles (5) are designed on both sides of the limiting steel plates (4), so that the steel square sleeve (2) can be pulled out of the soil under the action of a puller.
3. The device for pouring simulated tree root piles under soft foundation according to claim 1, characterized in that: The high-pressure grouting machine is used to convey the expansive concrete (3) to provide grouting pressure so as to make the grout material and the soft soil more compact.
4. The device for pouring simulated tree root piles under soft foundation according to claim 1, characterized in that: It also includes auger drills used for drilling holes. The auger drill excavates excess soil through spiral blades during the excavation process.
5. A method for pouring simulated tree root piles under soft foundation, characterized in that: The method is implemented by using a device for pouring simulated tree root piles under a soft foundation as described in any one of claims 1 to 4, and comprises the following steps: Step 1, material preparation, prepare steel round sleeve (1), steel square sleeve (2), expansive concrete (3), limit steel plate (4), clip (5), high-pressure grouting machine, auger, grouting pipe and puller; Step 2, site preparation, clean and level the soft foundation to ensure the safety and stability of the construction site, and determine the location and spacing of the simulated tree root piles according to the design requirements; Step 3, use a spiral drill to drill holes in the soft foundation. The diameter and depth of the holes should be determined according to the design requirements. During the drilling process, the steel round sleeve (1) is installed. During the whole process, attention should be paid to controlling the verticality and diameter of the holes to ensure the quality of the pile body. Step 4, after the steel round sleeve (1) is installed, the steel square sleeve (2) is driven into the opening on the side of the steel round sleeve (1) until the limiting steel plate (4) presses against the side of the steel round sleeve (1), and the excess soil in the steel square sleeve (2) is cleaned; Step 5, prepare a high-pressure grouting machine, connect the grouting pipe, and pour the expansive concrete (3) into the steel square sleeve (2) from bottom to top, and pull out the steel square sleeve (2) while grouting; Step 6, after the grouting of the steel square sleeve (2) is completed, grouting is quickly started into the steel round sleeve (1), and the steel round sleeve (1) is pulled out while grouting; Step 7, after grouting is completed, vibrate and add fluid.