A hole collapse prevention wall structure for bored pile construction

Abstract

The application relates to a hole collapse prevention wall structure for bored pile construction, which comprises a plurality of hole collapse prevention wall structure bodies, each of which comprises an inner protection cylinder and an outer protection cylinder sleeved together, a plurality of reinforcing ribs are arranged in a circumferential interval between the inner protection cylinder and the outer protection cylinder, the reinforcing ribs extend along the axial direction of the inner protection cylinder and are fixedly connected with the inner protection cylinder and the outer protection cylinder, both ends of the inner protection cylinder are exposed to the outer protection cylinder, and at least one end of the inner protection cylinder is sleeved with a water seepage prevention air bag; adjacent two hole collapse prevention wall structure bodies have a connected state, in the connected state, the water seepage prevention air bag can seal the joint between the adjacent two hole collapse prevention wall structure bodies; the hole collapse prevention wall structure can prevent the occurrence of water seepage to a certain extent, so as to guarantee the excavation efficiency.

Description

Technical Field

[0001] This application relates to the field of engineering construction protection technology, specifically to a borehole protection structure for preventing collapse during bored pile construction. Background Technology

[0002] Drilled pile foundations are a common deep foundation construction technique. They involve drilling holes at designated coordinates using specialized drilling equipment, placing a reinforcing cage inside, and then pouring concrete to form a pile. Deep drilled pile construction is used for buildings or structures requiring deep foundations, especially in complex geological conditions and where high bearing capacity is required. In existing deep drilled pile construction, steel casings protect the borehole walls from collapse and provide a stable environment for subsequent drilling. However, in cases of water seepage, drainage is necessary during excavation. Water seepage can occur at the rigid joints between casings, affecting excavation efficiency. Summary of the Invention

[0003] This application provides a hole-protecting structure for bored pile construction that can prevent water seepage to a certain extent.

[0004] The anti-collapse hole retaining structure for bored pile construction provided in this application includes multiple anti-collapse hole retaining structure main bodies. Each anti-collapse hole retaining structure main body includes an inner casing and an outer casing. Multiple reinforcing ribs are arranged circumferentially between the inner casing and the outer casing. The reinforcing ribs extend axially along the inner casing and fixably connect the inner casing and the outer casing. Both ends of the inner casing are exposed outside the outer casing, and at least one end of the inner casing is fitted with a seepage-proof airbag. Adjacent anti-collapse hole retaining structure main bodies are connected. In the connected state, the seepage-proof airbag can seal the joint between the two adjacent anti-collapse hole retaining structure main bodies.

[0005] In addition, the anti-collapse hole wall protection structure provided in this application may also have the following additional technical features: In one optional embodiment, at least one locking element is fixedly provided at one end of the inner protective cylinder, and a hole cylinder is fixedly provided at the other end of the inner protective cylinder. The inner wall of the hole cylinder is provided with at least one L-shaped locking groove. In the connected state, the locking element of one inner protective cylinder engages with the locking groove of the other inner protective cylinder.

[0006] In one alternative embodiment, a sealing cylinder is fitted around the outside of the orifice cylinder, and the water-proof airbag is fitted around the outer wall of the sealing cylinder; sealing ring plates are provided at both ends of the outer protective cylinder, and the sealing ring plates can seal the gap between the end of the outer protective cylinder and the outer wall of the inner protective cylinder.

[0007] In one alternative embodiment, the anti-collapse hole retaining structure further includes at least two limiting parts, which can limit the main body of the anti-collapse hole retaining structure when it is inserted into the borehole; the limiting part includes an abutting limiting member and a hydraulic cylinder, the hydraulic cylinder being drivenly connected to the abutting limiting member, and the end of the abutting limiting member being provided with an arc-shaped plate, the curvature of which matches the curvature of the outer casing.

[0008] In one alternative embodiment, the limiting part further includes a positioning column, a cast-in-place pile, and a support rod. The cast-in-place pile is pre-installed around the borehole, and a pre-embedded connector is provided inside the cast-in-place pile. The positioning column is connected to the pre-embedded connector. The end of the hydraulic cylinder away from the abutting limiting component is connected to the positioning column. The support rod connects the hydraulic cylinder and the positioning column.

[0009] The beneficial effects of this application are as follows: The anti-collapse hole retaining structure in this application adopts a double-layer structure of inner and outer casing. The reinforcing bars set between the inner and outer casing can effectively ensure the strength and stability of the structure. When two adjacent anti-collapse hole retaining structures are connected, the seepage-proof airbags set between them can seal the connection gap, which can prevent water seepage to a certain extent and thus ensure excavation efficiency.

[0010] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0011] Figure 1 A schematic diagram of the anti-collapse hole wall protection structure provided in this application in a specific embodiment; Figure 2 for Figure 1 A top view of the anti-collapse hole wall structure at the connection point of the inner and outer casings; Figure 3 for Figure 1 A schematic diagram of the anti-collapse hole wall protection structure at the relative sealing position of the seepage-proof airbag; Figure 4 A schematic diagram of the arrangement structure of the limiting part provided in this application in a specific embodiment.

[0012] Reference numerals: 1. Main body of anti-collapse hole retaining structure; 2. Inner casing; 21. Locking component; 22. Hole position cylinder; 23. Locking groove; 24. Sealing cylinder; 3. Outer casing; 31. Sealing ring plate; 4. Reinforcing rib; 5. Waterproof airbag; 6. Limiting part; 61. Abutment limiting component; 62. Hydraulic cylinder; 63. Positioning column; 64. Cast-in-place pile; 65. Support rod; 66. Embedded connecting component.

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0014] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0015] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0016] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0017] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0018] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0019] like Figure 1-4As shown in the embodiment of this application, an anti-collapse hole retaining structure for bored pile construction is provided. This anti-collapse hole retaining structure mainly includes multiple anti-collapse hole retaining structure bodies 1. Each anti-collapse hole retaining structure body 1 includes an inner casing 2 and an outer casing 3. Multiple reinforcing ribs 4 are circumferentially spaced between the inner casing 2 and the outer casing 3. The reinforcing ribs 4 extend axially along the inner casing 2 and fixably connect the inner casing 2 and the outer casing 3. The reinforcing ribs 4 increase the compressive strength of the inner casing 2, effectively ensuring the overall structural strength of the anti-collapse hole retaining structure body 1. Both ends of the inner casing 2 are exposed outside the outer casing 3, and at least one end of the inner casing 2 is fitted with a seepage-proof airbag 5. Adjacent anti-collapse hole retaining structure bodies 1 are connected; in the connected state, the seepage-proof airbag 5 can seal the joint between adjacent anti-collapse hole retaining structure bodies 1.

[0020] In this embodiment, the anti-collapse hole retaining wall structure adopts a double-layer structure of inner casing 2 and outer casing 3. The reinforcing ribs 4 set between the inner casing 2 and the outer casing 3 can effectively ensure the strength and stability of the structure. When two adjacent anti-collapse hole retaining wall structure main bodies 1 are connected, the seepage-proof airbags 5 set between them can seal the connection gap, which can prevent water seepage to a certain extent and thus ensure excavation efficiency.

[0021] It should be further noted that while bored pile construction uses casings to protect the borehole wall, in environments requiring drainage, the rigid connection of the casing can lead to water seepage. This is mainly due to the relatively simple design and connection methods of conventional steel casings, which mostly use rigid welding or bolt connections, lacking flexible adjustment capabilities. In complex strata (such as uneven soil layers), the casing is prone to micro-cracks due to uneven stress, which can also become seepage channels. The double-layer structure of the anti-collapse borehole wall protection structure 1 in this application increases the overall strength. Furthermore, after the stress is transferred to the inner casing 2 through the outer casing 3 and reinforcing bars 4, the inner casing 2 experiences more uniform stress and is less prone to micro-cracks. Therefore, this double-layer structure not only increases structural strength but also reduces the occurrence of seepage to a certain extent.

[0022] like Figure 1-2 As shown, in one specific embodiment, at least one locking member 21 is fixedly provided at one end of the inner protective cylinder 2, and a hole cylinder 22 is fixedly provided at the other end of the inner protective cylinder 2. The inner wall of the hole cylinder 22 is provided with at least one L-shaped locking groove 23. In the connected state, the locking member 21 of one inner protective cylinder 2 is engaged with the locking groove 23 of the other inner protective cylinder 2.

[0023] like Figure 1 and Figure 3As shown, in one specific embodiment, a sealing cylinder 24 is sleeved on the outer side of the orifice cylinder 22, and a water-proof airbag 5 is sleeved on the outer wall of the sealing cylinder 24; sealing ring plates 31 are provided at both ends of the outer protective cylinder 3, and the sealing ring plates 31 can seal the gap between the end of the outer protective cylinder 3 and the outer wall of the inner protective cylinder 2.

[0024] Specifically, in this embodiment, a hole-positioning cylinder 22 is welded to the upper outer side of the inner casing 2. Both the upper and lower ends of the outer casing 3 are provided with sealing ring plates 31 that fit and cooperate with the inner casing 2. The sealing ring plates 31 are welded and fixed to both the outer casing 3 and the inner casing 2. The sealing ring plates 31 ensure a stable connection between the outer casing 3 and the inner casing 2, and also seal the gap between the end of the outer casing 3 and the outer wall of the inner casing 2. During drilling, the anti-collapse hole wall protection structure 1 can be locked by the cooperation of the locking member 21 and the locking groove 23, facilitating the installation and disassembly of the anti-collapse hole wall protection structure 1. A sealing cylinder 24 is also fitted outside the hole-positioning cylinder 22, and a water-proof airbag 5 is fitted outside the sealing cylinder 24. The water-proof airbag 5 can be positioned between the sealing ring plates 31 of adjacent upper and lower anti-collapse hole wall protection structure 1s, effectively ensuring water-proof performance.

[0025] like Figure 1 and Figure 4 As shown, in one specific embodiment, the anti-collapse hole retaining structure further includes at least two limiting parts 6, which can limit the anti-collapse hole retaining structure body 1 when it is inserted into the borehole; the limiting part 6 includes an abutting limiting member 61 and a hydraulic cylinder 62, the hydraulic cylinder 62 is drivenly connected to the abutting limiting member 61, and the end of the abutting limiting member 61 is provided with an arc plate, the curvature of the arc plate matching the curvature of the outer casing 3.

[0026] The limiting part 6 also includes a positioning post 63, a cast-in-place pile 64, and a support rod 65. The cast-in-place pile 64 is pre-installed around the borehole, and a pre-embedded connector 66 is provided inside the cast-in-place pile 64. The positioning post 63 is connected to the pre-embedded connector 66. The end of the hydraulic cylinder 62 away from the limiting part 61 is connected to the positioning post 63. The support rod 65 connects the hydraulic cylinder 62 and the positioning post 63. Generally, the number of limiting parts 6 is not less than two, and usually three to five are sufficient. This article does not make a specific limit on this. Multiple limiting parts 6 can be evenly arranged around the borehole.

[0027] Specifically, in this embodiment, the main body 1 of the anti-collapse hole retaining structure is provided with cast-in-place piles 64 at intervals around the borehole, and a pre-embedded connector 66 is pre-embedded in the cast-in-place pile 64. The upper end of the pre-embedded connector 66 is connected to a positioning column 63. A support rod 65 is fixed between the positioning column 63 and the hydraulic cylinder 62 by bolts. The support rod 65 is inclined. This structure can ensure that the hydraulic cylinder 62 has reliable positioning processing, allowing the hydraulic cylinder 62 to adjust the contact limiting member 61 laterally. The side of the positioning column 63 is connected to the hydraulic cylinder 62. The movable end of the hydraulic cylinder 62 is provided with a contact limiting member 61 that contacts and cooperates with the outer casing 3. The contact limiting member 61 and the hydraulic cylinder 62 are rotatably connected by a screw. This structure can support the outer casing 3 through the contact limiting member 61 to ensure the vertical positioning accuracy of the outer casing 3.

[0028] Working principle: When using the anti-collapse hole protection structure for deep bored pile construction, firstly, a pit is dug around the borehole to construct a cast-in-place pile 64, and the pre-embedded connector 66 is pre-embedded in the cast-in-place pile 64. The positioning column 63 and the pre-embedded connector 66 are fixed with bolts. During the construction of the deep bored pile, the main body 1 of the anti-collapse hole protection structure 1, composed of the outer casing 3 and the inner casing 2, gradually penetrates into the borehole. The upper and lower adjacent inner casings 2 are locked into the locking groove 23 by the locking piece 21, and locking is achieved by rotating the upper inner casing 2. At this time, the anti-collapse hole protection structure is activated. Water-permeable airbags 5 are installed between sealing ring plates 31 to achieve sealing and water-proof treatment between adjacent inner casings 2. Hole position cylinders 22 and sealing cylinders 24 ensure the reliable opening position of locking grooves 23. Reinforcing ribs 4 and sealing ring plates 31 provide structural reinforcement to outer casings 3 and inner casings 2, ensuring that the main body 1 of the anti-collapse hole wall structure has compressive strength. Hydraulic cylinders 62, positioned by positioning columns 63 and support rods 65, provide stable support to outer casings 3 through contact limiting parts 61, ensuring the accurate longitudinal position of the main body 1 of the anti-collapse hole wall structure, thereby completing a series of tasks.

[0029] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A borehole wall protection structure for preventing collapse during bored pile construction, characterized in that, The device includes multiple anti-collapse hole retaining wall structures. Each anti-collapse hole retaining wall structure includes an inner retaining tube and an outer retaining tube. Multiple reinforcing ribs are arranged circumferentially between the inner and outer retaining tubes. The reinforcing ribs extend axially along the inner retaining tube and fixably connect the inner and outer retaining tubes. Both ends of the inner retaining tube are exposed outside the outer retaining tube, and at least one end of the inner retaining tube is fitted with a water-proof airbag. Adjacent anti-collapse hole retaining wall structures are connected. In the connected state, the water-proof airbag can seal the joint between adjacent anti-collapse hole retaining wall structures.

2. The anti-collapse hole protection structure for bored pile construction according to claim 1, characterized in that, At least one locking element is fixedly provided at one end of the inner protective cylinder, and a hole cylinder is fixedly provided at the other end of the inner protective cylinder. The inner wall of the hole cylinder is provided with at least one L-shaped locking groove. In the connected state, the locking element of one inner protective cylinder engages with the locking groove of the other inner protective cylinder.

3. The anti-collapse hole protection structure for bored pile construction according to claim 2, characterized in that, A sealing cylinder is fitted on the outer side of the orifice cylinder, and the water-proof airbag is fitted on the outer wall of the sealing cylinder; sealing ring plates are provided at both ends of the outer protective cylinder, and the sealing ring plates can seal the gap between the end of the outer protective cylinder and the outer wall of the inner protective cylinder.

4. The anti-collapse borehole wall protection structure for bored pile construction according to any one of claims 1-3, characterized in that, It also includes at least two limiting parts, which can limit the main body of the anti-collapse hole wall protection structure when it is inserted into the borehole; the limiting part includes an abutting limiting member and a hydraulic cylinder, the hydraulic cylinder is drivenly connected to the abutting limiting member, and the end of the abutting limiting member is provided with an arc plate, the curvature of the arc plate matching the curvature of the outer casing.

5. The anti-collapse hole protection structure for bored pile construction according to claim 4, characterized in that, The limiting part also includes a positioning column, a cast-in-place pile, and a support rod. The cast-in-place pile is pre-set around the borehole, and a pre-embedded connector is provided inside the cast-in-place pile. The positioning column is connected to the pre-embedded connector. The end of the hydraulic cylinder away from the abutting limiting component is connected to the positioning column. The support rod connects the hydraulic cylinder and the positioning column.

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