A bamboo cage cement-soil pile and deep soft soil site pipe pile reinforcing structure

Abstract

The utility model relates to a kind of bamboo cage cement-soil pile and deep soft soil site pipe pile reinforcing structure, including deep soft soil site, the grid area of several pieces is divided on the deep soft soil site, grid area is all provided with bamboo cage cement-soil pile reinforcing zone, the bamboo cage cement-soil pile reinforcing zone is all provided with several bamboo cage cement-soil piles, bamboo cage cement-soil pile includes cement-soil pile, the inside of the cement-soil pile is embedded with bamboo cage. Relative to cement-soil pile, insert bamboo cage in the center of cement-soil pile to form pile body reinforcing body, bamboo cage and cement-soil form whole, improve the strength of cement-soil pile, improve the vertical bearing capacity and horizontal bearing capacity of cement-soil pile, significantly improve soft soil solidification effect. The bamboo cage cement-soil pile reinforcing zone of regional grid arrangement can provide relatively hard site for pile foundation construction, foundation pit excavation and other equipment walk machine, reduce the situation that pile foundation is inclined, broken pile and floating pile appear in pile foundation construction process, foundation pit excavation process.

Description

Technical Field

[0001] This utility model relates to a bamboo cage cement-soil pile and a pipe pile reinforcement structure for deep soft soil sites, belonging to the field of engineering application technology. Background Technology

[0002] Soft soil generally refers to silt and silty soil, characterized by high water content, low permeability, high compressibility, high thixotropy, and low shear strength, making it a poor geological condition. Prestressed concrete pipe piles (hereinafter referred to as pipe piles) are widely used in construction engineering due to their advantages such as high single pile bearing capacity, reliable quality, and low cost. However, pipe piles are thin-walled hollow concrete components with poor resistance to bending moments. Deep soft soil sites provide weak constraints on the perimeter of pipe piles, resulting in weak resistance to bending moments and horizontal forces. The hardness of the soil around the pile has a significant impact on the bending moment of the pile body; a hard shell layer at the pile top and body will significantly reduce the bending moment, improving the pile's horizontal bearing capacity and seismic performance. For deep soft soil sites, current engineering projects typically adopt measures such as replacing or reinforcing the soft soil at the pile top and body to improve soil properties and ensure the horizontal bearing capacity of the pipe pile, thereby improving its seismic performance.

[0003] The construction of pipe piles in deep soft soil sites is quite difficult. Common problems in pile foundation engineering are as follows: (1) The construction site of deep soft soil cannot bear the load of the pile driving equipment (especially the static pile driver), and there is a safety risk of the pile driving equipment overturning; (2) During the process of pipe pile formation, it is easy to cause pile position deviation and pile body tilting; (3) During the excavation of the foundation pit and the construction of large mechanical equipment, due to unfavorable factors such as soil compression and mechanical vibration, it is easy to cause pipe pile deviation, tilting and pile breakage; (4) Due to the lateral displacement of the soft soil in the foundation pit and the heave of the pit bottom, it is easy to cause large-area floating piles; (5) The quality of pipe pile formation in soft soil areas is poor, which is easy to cause large-area unqualified piles; (6) The treatment of unqualified pile foundations is difficult, costly and time-consuming.

[0004] As mentioned above, the construction of pipe piles in deep soft soil sites is difficult and there are many problems in the pile foundation project. In order to improve the quality of pile foundation, the following measures are usually taken for pipe pile construction: (1) Brick slag replacement method, that is, using brick slag to treat the temporary construction site. This method has a wide range of filling resources and low treatment costs, but it is only applicable to the surface hardening of the site; (2) Cement-soil pile solidification method, that is, mixing cement slurry with the foundation soil to form a cement-soil pile with a certain strength. The reinforcement effect is good, but the dispersion is large and the reinforcement cost is high. Sometimes a single steel bar (or bamboo) is inserted in the center of the cement-soil pile to enhance the strength of the cement-soil pile; (3) Re-pressurization method, that is, the pipe pile is further sunk by re-pressurizing to eliminate the floating pile phenomenon. This method has a good treatment effect, but the construction period is long and the cost is high; (4) Strengthen the foundation pit support measures to reduce the impact of foundation pit deformation and foundation pit excavation on the pipe pile.

[0005] To address the above technical problems, this utility model provides a bamboo cage cement-soil pile and a pipe pile reinforcement structure for deep soft soil sites. The structure is not only reasonable and can improve the engineering quality of pipe piles in deep soft soil sites, but it can also effectively save on engineering costs. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a bamboo cage cement soil pile and a pipe pile reinforcement structure for deep soft soil sites.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a bamboo cage cement-soil pile, comprising a cement-soil pile, wherein a bamboo cage is embedded inside the cement-soil pile.

[0008] Preferably, the bamboo cage and the cement-soil pile are coaxial with each other.

[0009] Preferably, the bamboo cage comprises several vertical bamboo strips distributed in a circle, and the several vertical bamboo strips are fixedly connected to each other as a whole by several horizontal bamboo strips distributed in a vertical manner.

[0010] Preferably, the thicker section of the vertical bamboo strip faces upward and the thinner section faces downward.

[0011] Preferably, the length of the bamboo cage is 200mm to 500mm shorter than the length of the cement-soil pile.

[0012] A pipe pile reinforcement structure for deep soft soil sites includes a deep soft soil site, which is divided into several grid areas. Each grid area is reinforced with a bamboo cage cement-soil pile reinforcement strip, and each bamboo cage cement-soil pile reinforcement strip is reinforced with several bamboo cage cement-soil piles.

[0013] Preferably, the bamboo cage cement-soil pile reinforcement strip is set at the edge of the grid area.

[0014] Preferably, a number of bamboo cage cement-soil piles are continuously arranged on the bamboo cage cement-soil pile reinforcement strip.

[0015] Preferably, a number of bamboo cage cement-soil piles are arranged at intervals on the bamboo cage cement-soil pile reinforcement strip, and cement-soil piles without bamboo cages buried inside are set in the interval spaces.

[0016] Preferably, bamboo cage cement-soil pipe piles are also installed in some grid areas of the deep soft soil site. The bamboo cage cement-soil pipe piles include bamboo cage cement-soil piles, which are wrapped around the outer periphery of the pipe piles.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Compared to cement-soil piles, inserting a bamboo cage into the center of the cement-soil pile forms a pile reinforcement. The bamboo cage and the cement-soil become an integral whole, which improves the strength of the cement-soil pile, increases its vertical and horizontal bearing capacity, and significantly improves the solidification effect of soft soil.

[0018] 2. Compared to using a single steel bar as the reinforcement in cement-soil piles, using bamboo cages as the reinforcement in cement-soil piles is more economical, greener, and more energy-efficient.

[0019] 3. Compared to using a single bamboo pole as a reinforcement for cement-soil piles, using a bamboo cage as a reinforcement for cement-soil piles results in a stronger reinforcement effect on soft soil because the bamboo cage and cement-soil form a whole.

[0020] 4. The bamboo cage cement-soil pile reinforcement zone with a grid layout in different areas can provide a harder site for equipment to move around during pile foundation construction and foundation pit excavation, reducing the occurrence of pile tilting, broken piles and floating piles during the pile foundation construction and foundation pit excavation process.

[0021] 5. The bamboo cage cement-soil pile reinforcement strip arranged in a grid pattern in different areas can effectively improve the strength of soft soil, provide horizontal restraint for the pipe piles, and improve the horizontal bearing capacity and seismic performance of the pipe piles.

[0022] 6. As needed, bamboo cage cement-soil piles can be wrapped around the outer periphery of the pipe pile to form an effective enclosure and constraint for the pipe pile.

[0023] 7. Compared to a full-area arrangement of cement-soil piles, a grid-based arrangement of bamboo cage cement-soil piles in different areas is more economical.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the plan layout of the pipe pile reinforcement structure for deep soft soil sites according to an embodiment of this utility model.

[0026] Figure 2 This is a schematic diagram of the arrangement of bamboo cage cement-soil pipe piles according to an embodiment of the present utility model.

[0027] Figure 3a This is a schematic diagram of the first arrangement of several bamboo cage cement-soil piles on the bamboo cage cement-soil pile reinforcement strip.

[0028] Figure 3b This is a schematic diagram of a second arrangement of several bamboo cage cement-soil piles on a bamboo cage cement-soil pile reinforcement strip.

[0029] Figure 3c This is a schematic diagram of a third arrangement of several bamboo cage cement-soil piles on a bamboo cage cement-soil pile reinforcement strip.

[0030] Figure 4This is a cross-sectional view of a bamboo cage cement-soil pile according to an embodiment of the present invention.

[0031] Figure 5 This is a top view of the bamboo cage according to an embodiment of the present utility model.

[0032] Figure 6 This is a cross-sectional view of a bamboo-cage cement-soil pipe pile according to an embodiment of the present invention.

[0033] In the diagram: 1. Cement-soil pile; 2. Bamboo cage cement-soil pile; 3. Pipe pile; 4. Foundation; 5. Vertical bamboo strip; 6. Horizontal bamboo strip; 7. Ground horizontal positioning bracket; 8. Ground horizontal positioning bracket hook; 9. Deep soft soil site; 10. Grid area. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] like Figures 1-6 As shown, this embodiment provides a bamboo cage cement-soil pile, including a cement-soil pile 1, wherein a bamboo cage is embedded inside the cement-soil pile.

[0038] In this embodiment of the utility model, the bamboo cage and the cement-soil pile are coaxial with each other.

[0039] In this embodiment of the utility model, the bamboo cage includes several vertical bamboo strips 5 arranged in a circle, and the several vertical bamboo strips are fixedly connected to each other by several horizontal bamboo strips 6 arranged in a vertical manner.

[0040] In this embodiment of the utility model, the thicker section of the vertical bamboo strip faces upward and the thinner section faces downward.

[0041] In this embodiment of the utility model, the length of the bamboo cage is 200mm to 500mm shorter than the length of the cement-soil pile.

[0042] A pipe pile reinforcement structure for deep soft soil sites includes a deep soft soil site 9, which is divided into several grid areas 10. Each grid area is reinforced with a bamboo cage cement-soil pile reinforcement strip, and each bamboo cage cement-soil pile reinforcement strip is reinforced with several bamboo cage cement-soil piles 2.

[0043] In this embodiment of the utility model, the bamboo cage cement-soil pile reinforcement strip is set at the edge of the grid area.

[0044] In this embodiment of the utility model, a number of bamboo cage cement-soil piles are continuously arranged on the bamboo cage cement-soil pile reinforcement strip.

[0045] In this embodiment of the utility model, a number of bamboo cage cement-soil piles are arranged at intervals on the bamboo cage cement-soil pile reinforcement belt, and cement-soil piles without bamboo cages buried inside are set in the interval spaces.

[0046] In this embodiment of the utility model, bamboo cage cement-soil pipe piles are also provided on a portion of the grid area of ​​the deep soft soil site. The bamboo cage cement-soil pipe piles include bamboo cage cement-soil piles, which are wrapped around the outer periphery of the pipe pile 3.

[0047] In this embodiment of the invention, the pipe pile reinforcement structure for deep soft soil sites comprehensively considers factors such as the engineering geological characteristics of the deep soft soil sites, relevant specifications and requirements, pile foundation layout, pile foundation construction organization, and excavation organization of the foundation pit. It reinforces the deep soft soil sites by arranging bamboo cage cement-soil piles in a grid pattern across different areas, with some areas using bamboo cage cement-soil piles wrapped around the outer perimeter of the pipe piles for reinforcement. This bamboo cage cement-soil pile reinforcement improves the strength of the soft soil, ensures the horizontal constraint of the soil on the pipe piles, and enhances the horizontal bearing capacity and seismic performance of the pipe piles. Furthermore, it reduces the occurrence of pile tilting, pile breakage, and floating piles during pile foundation construction and foundation pit excavation.

[0048] In this embodiment of the utility model, bamboo cages are tied up at the construction site or prefabricated bamboo cages are transported to the site from the factory.

[0049] In this embodiment of the utility model, the bamboo cage is hoisted and lowered after the cement-soil pile construction but before the cement-soil has initially set.

[0050] In this embodiment of the invention, pipe pile construction is carried out after the cement-soil pile has finally set and reached a certain strength.

[0051] In this embodiment of the utility model, the implementation steps of the pipe pile reinforcement structure for deep soft soil sites are as follows: (1) Taking into account the engineering geological characteristics of the deep soft soil site, the relevant specifications and requirements, the pile foundation layout, pile foundation construction and excavation of the foundation pit, the bamboo cage cement soil pile reinforcement scheme is determined.

[0052] (2) On-site layout to determine the plan layout of the bamboo cage cement soil piles.

[0053] (3) Material processing: bamboo cages are tied up at the construction site or prefabricated bamboo cages are transported to the site.

[0054] (4) Cement-soil pile construction.

[0055] (5) Before the cement soil initially sets, lift and lower the bamboo cage to the designated position.

[0056] (6) After the bamboo cage cement soil pile reinforcement belt reaches a certain strength, pipe pile construction is carried out.

[0057] (7) The movement of pile foundation equipment, the sequence of pile foundation construction and the sequence of earthwork excavation shall be determined in conjunction with the layout of the reinforcement strip.

[0058] In practice, bamboo cage cement soil piles are arranged in a zoned grid pattern or with additional external pipe piles in certain areas, depending on the project situation.

[0059] In practice, bamboo cages can be tied on-site or prefabricated in a factory.

[0060] In practice, after the cement-soil piles are completed and before the cement-soil has initially set, the bamboo cages are hoisted and lowered.

[0061] In practice, the next step can only be carried out after the bamboo cage cement soil piles have reached a certain strength.

[0062] In practice, the bamboo cages do not deform during the lifting and lowering process.

[0063] In practice, a ground-level horizontal positioning support needs to be installed on top of the bamboo cage to prevent it from shifting before the cement and soil solidify. The support should be removed after the cement and soil have solidified. The support has hooks to hold the bamboo cage in place.

[0064] In practice, bamboo cages can be continuously arranged on cement-soil piles (e.g.) Figure 3a As shown), or arranged with one skipped interval (e.g. Figure 3b As shown), or arranged with a skip-two-one arrangement (such as...). Figure 3c (As shown).

[0065] In practice, considering the movement of machinery and the stability of the excavated soil, the top elevation of the bamboo cage of the cement-soil pile can be at the ground level. Later, the cement-soil piles that are higher than the basement floor slab need to be removed.

[0066] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A bamboo-cage cement-soil pile, characterized in that: The system includes cement-soil piles, with bamboo cages embedded inside the piles. The bamboo cages consist of several vertically arranged bamboo strips distributed in a circle, which are fixedly connected as a whole by several horizontally arranged bamboo strips.

2. The bamboo-cage cement-soil pile according to claim 1, characterized in that: The bamboo cage and the cement-soil pile are coaxial with each other.

3. The bamboo-cage cement-soil pile according to claim 1, characterized in that: The thicker sections of the vertical bamboo strips face upwards, and the thinner sections face downwards.

4. The bamboo-cage cement-soil pile according to claim 1, characterized in that: The length of the bamboo cage is 200mm to 500mm shorter than the length of the cement-soil pile.

5. A pipe pile reinforcement structure for deep soft soil sites, employing bamboo cage cement-soil piles as described in any one of claims 1-4, characterized in that: The site includes a deep soft soil area, which is divided into several grid areas. Each grid area is reinforced with a bamboo cage cement-soil pile, and each bamboo cage cement-soil pile is reinforced with several bamboo cage cement-soil piles.

6. The pipe pile reinforcement structure for deep soft soil sites according to claim 5, characterized in that: The bamboo cage cement-soil pile reinforcement strip is set at the edge of the grid area.

7. The pipe pile reinforcement structure for deep soft soil sites according to claim 5, characterized in that: Several bamboo cage cement-soil piles are continuously arranged on the bamboo cage cement-soil pile reinforcement strip.

8. The pipe pile reinforcement structure for deep soft soil sites according to claim 5, characterized in that: Several bamboo cage cement-soil piles are arranged at intervals on the bamboo cage cement-soil pile reinforcement belt, and cement-soil piles without bamboo cages inside are set in the interval gaps.

9. The pipe pile reinforcement structure for deep soft soil sites according to claim 5, characterized in that: Bamboo cage cement-soil pipe piles are also installed in some grid areas of the deep soft soil site. The bamboo cage cement-soil pipe piles include bamboo cage cement-soil piles, which are wrapped around the outer periphery of the pipe piles.

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