A recoverable steel casing for bored pile construction
By setting movable and limiting arc plates inside the steel casing, the problem of difficult recycling of steel casing in complex geological environments is solved, achieving stable separation and recycling of the steel casing, avoiding deformation and cracking, and improving resource utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA WATER CONSERVANCY & HYDROPOWER NO 9 ENG BUREAU CO LTD
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-04
AI Technical Summary
When traditional recyclable steel casings are recycled in complex geological environments such as clay layers and dense sand layers, the high adhesion between the steel casing and the soil layer makes recycling difficult, and the casings are prone to deformation or weld cracking, resulting in a waste of steel resources.
A recyclable steel casing for bored pile construction is designed. It adopts a structure of movable arc plate, upper limit arc plate and lower limit arc plate inside the casing body. The steel casing is separated from the soil layer by small-amplitude rotation and sliding, which reduces friction and avoids direct overall traction. The stability and limiting effect are ensured by limit blocks and compression springs.
This effectively avoids deformation and cracking of the steel casing due to excessive friction during the recycling process, ensuring the integrity and recyclability of the steel casing and reducing steel waste.
Smart Images
Figure CN224591437U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bored pile construction technology, and in particular to a recyclable steel casing for bored pile construction. Background Technology
[0002] In the field of bored pile construction, steel casings, as core support components, are widely used in complex geological conditions such as soft soil, quicksand, and high water levels. Their main function is to protect the borehole wall, prevent it from collapsing during construction, and isolate groundwater and mud, thus ensuring the quality of the pile. With the advancement of green construction and resource recycling concepts, traditional steel casings that are buried underground in one go are gradually being replaced by recyclable steel casings due to problems such as large steel waste and easy interference with subsequent underground structure construction.
[0003] Currently, the recovery drive method for recyclable steel casings mainly relies on the traction force of top hoisting equipment or a simple axial hydraulic jacking structure. In actual construction, in complex geological environments such as clay layers and dense sand layers, this type of drive structure is prone to problems because the steel casing is in contact with the soil for a long time, and strong adhesion easily forms between the casing wall and the soil layer. This results in the need to overcome the huge frictional resistance of the entire steel casing during casing recovery. When relying on top hoisting to directly pull the steel casing as a whole, excessive tension can easily cause deformation of the top of the casing and cracking of the welds, making it impossible to continue recovering the steel casing and wasting steel resources. Utility Model Content
[0004] Therefore, it is necessary to provide a recyclable steel casing for bored pile construction to address the problem that excessive tension can easily cause deformation of the top of the casing and cracking of the weld when the steel casing is directly pulled by top hoisting, resulting in the inability to continue recycling the steel casing and wasting steel resources.
[0005] A recyclable steel casing for bored pile construction includes: a casing mechanism, wherein the casing mechanism includes a casing body and a supporting arc plate;
[0006] An auxiliary mechanism, comprising an upper limit arc plate, a movable arc plate, and a lower limit arc plate, wherein two sets of each of the upper limit arc plate, the movable arc plate, and the lower limit arc plate are provided;
[0007] The casing body has a sliding groove inside that corresponds to the upper limit arc plate and the lower limit arc plate. The upper limit arc plate and the lower limit arc plate are slidably disposed inside the casing body, and the two sets of movable arc plates are rotatably disposed inside the casing body.
[0008] In one embodiment, limit blocks are fixedly provided on the outer sides of both the upper limit arc plate and the lower limit arc plate. The limit blocks are configured as convex blocks, and a limit groove corresponding to the limit block is provided on the inner side of the protective cylinder body.
[0009] In one embodiment, the upper surfaces of the limiting blocks on the outer sides of the two sets of upper limit arc plates are provided with compression springs, and the lower surfaces of the limiting blocks on the outer sides of the two sets of lower limit arc plates are provided with two other sets of compression springs, and the four sets of compression springs are disposed inside the corresponding limiting grooves.
[0010] In one embodiment, the lower surfaces of both sets of movable arc plates are provided with connecting columns, and the lower surfaces of both sets of connecting columns are provided with rotating rods. The two sets of movable arc plates are rotatably mounted inside the casing body via the rotating rods. The upper surface of the lower limiting arc plate is provided with rotating grooves corresponding to the two sets of rotating rods.
[0011] In one embodiment, the movable arc plate is located between the upper limit arc plate and the lower limit arc plate, and the movable arc plate is in contact with both the upper limit arc plate and the lower limit arc plate.
[0012] In one embodiment, the inner side of the casing body is provided with movable grooves corresponding to the two sets of movable arc plates, and the movable grooves are connected to the sliding grooves.
[0013] In one embodiment, operating rods are fixedly provided on the outer sides of both sets of movable arc plates, and through grooves corresponding to the two sets of operating rods are opened on the outer side of the protective cylinder body.
[0014] In one embodiment, the supporting arc plate is disposed inside the casing body, and the upper limit arc plate, the movable arc plate and the lower limit arc plate are all in contact with the supporting arc plate.
[0015] Beneficial effects
[0016] 1. The aforementioned recyclable steel casing utilizes a movable arc plate rotatably mounted inside the casing body and an upper limit arc plate slidably mounted inside the casing body. These two sets of upper limit arc plates limit the movable arc plate. When disassembly of the steel casing is required, the movable arc plate rotates slightly, separating it from the soil layer. Simultaneously, the movable arc plate causes the upper and lower limit arc plates to move slightly, further separating them from the soil layer. This separates the steel casing in sections from the soil, avoiding direct traction of the entire steel casing during hoisting, which would result in excessive friction between the inner wall of the steel casing and the soil layer. This prevents deformation or cracking of the steel casing and ensures its subsequent recycling and reuse.
[0017] 2. In the above-mentioned recyclable steel casing, the upper limit arc plate and the lower limit arc plate are slidably set inside the casing body by the limit block, thereby ensuring the stability of the upper limit arc plate and the lower limit arc plate during the sliding process. Under the action of the compression spring, the upper limit arc plate and the lower limit arc plate limit and clamp the movable arc plate, thereby ensuring that the movable arc plate will not tilt during use. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is an exploded view of the overall structure of this utility model;
[0021] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;
[0022] Figure 4 This is a cross-sectional view of the overall structure of this utility model;
[0023] Figure 5 This utility model Figure 4 Enlarged view of point B in the middle.
[0024] Reference numerals: 100, casing mechanism; 200, auxiliary mechanism; 101, casing body; 102, supporting arc plate; 103, sliding groove; 201, upper limit arc plate; 202, movable arc plate; 203, lower limit arc plate; 204, through groove; 205, limiting block; 206, compression spring; 207, rotating groove; 208, rotating rod; 209, connecting column; 210, operating rod; 211, limiting groove; 212, movable groove. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0026] The following is combined Figures 1-5 This invention describes a recyclable steel casing for bored pile construction.
[0027] In one embodiment, a recyclable steel casing for bored pile construction includes: a casing mechanism 100, which includes a casing body 101 and a supporting arc plate 102; an auxiliary mechanism 200, which includes an upper limit arc plate 201, a movable arc plate 202, and a lower limit arc plate 203, with two sets of each; a sliding groove 103 corresponding to the upper limit arc plate 201 and the lower limit arc plate 203 is provided inside the casing body 101, and the upper limit arc plate 201 and the lower limit arc plate 203 are slidably disposed inside the casing body 101; two sets of movable arc plates 202 are rotatably disposed inside the casing body 101; and a supporting arc plate 102 is disposed inside the casing body 101, with the upper limit arc plate 201, the movable arc plate 202, and the lower limit arc plate 203 all in contact with the supporting arc plate 102.
[0028] In this embodiment, the movable arc plate 202 is made of a material with a certain degree of elasticity, such as high-strength spring steel, to ensure that the movable arc plate 202 can rotate slightly inside the casing body 101, and to prevent the movable arc plate 202 from being clamped by the soil layer, the upper limit arc plate 201 and the lower limit arc plate 203 and unable to rotate; and the sliding groove 103 is provided to ensure that the upper limit arc plate 201 and the lower limit arc plate 203 can move up and down, and both sets of sliding grooves 103 are connected to the outside, so as to ensure that when the movable arc plate 202 rotates, it can squeeze the upper limit arc plate 201 and the lower limit arc plate 203 to move, thereby avoiding the need to directly pull the steel casing as a whole by hoisting, which would cause greater friction between the inner wall of the steel casing and the soil layer.
[0029] like Figure 3 , Figure 4 and Figure 5 As shown, limit blocks 205 are fixedly installed on the outer sides of both the upper limit arc plate 201 and the lower limit arc plate 203. The limit blocks 205 are convex blocks, and the inner side of the protective cylinder body 101 is provided with a limit groove 211 corresponding to the limit block 205. The upper surface of the limit blocks 205 on the outer side of both sets of upper limit arc plates 201 is provided with compression springs 206, and the lower surface of the limit blocks 205 on the outer side of both sets of lower limit arc plates 203 is provided with two other sets of compression springs 206. The four sets of compression springs 206 are located inside the corresponding limit grooves 211. The lower surface of both sets of movable arc plates 202 is provided with connecting posts 209, and the lower surface of both sets of connecting posts 209 is provided with rotating rods 208. The two sets of movable arc plates 202 are rotatably mounted inside the protective cylinder body 101 through the rotating rods 208. The upper surface of the lower limit arc plate 203 is provided with rotating grooves 207 corresponding to the two sets of rotating rods 208.
[0030] In this embodiment, the limiting block 205 is configured as a protrusion and moves along the inside of the limiting groove 211, thereby ensuring that the upper limiting arc plate 201 and the lower limiting arc plate 203 can move without dislodging from the inner side of the casing body 101; and a compression spring 206 is provided on the upper or lower surface of the limiting block 205, which drives the upper limiting arc plate 201 and the lower limiting arc plate 203 to move towards the movable arc plate 202, thereby clamping the movable arc plate 202 by the upper limiting arc plate 201 and the lower limiting arc plate 203, ensuring that the movable arc plate 202 is not operated. At time 2, the movable arc plate 202 will not be displaced, thus ensuring that when the casing body 101 is in use, the upper limit arc plate 201, the movable arc plate 202, and the lower limit arc plate 203 are all in contact, preventing soil from seeping between the upper limit arc plate 201, the movable arc plate 202, and the lower limit arc plate 203; by setting a rotating rod 208 and a connecting column 209 inside the rotating groove 207, the stability of the movable arc plate 202 during the rotation process inside the upper limit arc plate 201 is ensured, preventing the movable arc plate 202 from detaching from the inside of the casing body 101.
[0031] like Figure 2 and Figure 5 As shown, the movable arc plate 202 is located between the upper limit arc plate 201 and the lower limit arc plate 203, and the movable arc plate 202 is in contact with both the upper limit arc plate 201 and the lower limit arc plate 203; the inner side of the protective sleeve body 101 is provided with a movable groove 212 corresponding to the two sets of movable arc plates 202, and the movable groove 212 is connected to the sliding groove 103; an operating rod 210 is fixedly provided on the outer side of each of the two sets of movable arc plates 202, and a through groove 204 corresponding to the two sets of operating rods 210 is provided on the outer side of the protective sleeve body 101;
[0032] In this embodiment, the movable groove 212 ensures that the movable arc plate 202 can rotate inside the movable groove 212, preventing the movable groove 212 from being completely in contact with the inner side of the casing body 101 and unable to rotate. The operating rod 210 passes through the through groove 204 to drive the movable arc plate 202 to rotate. A connecting ring is provided at the outer end of the operating rod 210 to facilitate the use of tools by workers to drive the movable arc plate 202 to rotate, thereby reducing the friction between the casing body 101 and the soil layer in stages. This avoids relying on hoisting to directly pull the steel casing as a whole, which would result in greater friction between the inner wall of the steel casing and the soil layer, thus ensuring the subsequent recycling and use of the steel casing.
[0033] Working principle: When it is necessary to disassemble the casing body 101, the operator connects the hydraulic push rod or other equipment to the operating rod 210, and then repeatedly drives the operating rod 210 to move, thereby first driving the movable arc plate 202 to rotate slightly. The movable arc plate 202 has a certain degree of elasticity. After the movable arc plate 202 can rotate slightly, it squeezes the upper limit arc plate 201 and the lower limit arc plate 203, thereby driving the upper limit arc plate 201 and the lower limit arc plate 203 to move, and then separating the upper limit arc plate 201 and the lower limit arc plate 203 from the soil layer. Finally, the casing body 101 is lifted as a whole by traction. At this time, it is only necessary to solve the friction between the supporting arc plate 102 and the soil layer, thereby avoiding the need to directly pull the steel casing as a whole by hoisting, which would cause greater friction between the inner wall of the steel casing and the soil layer, thus ensuring the subsequent recycling and use of the steel casing.
[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A recyclable steel casing for bored pile construction, characterized in that, include: The sleeve mechanism (100) includes a sleeve body (101) and a supporting arc plate (102); An auxiliary mechanism (200) includes an upper limit arc plate (201), a movable arc plate (202), and a lower limit arc plate (203), wherein two sets of each of the upper limit arc plate (201), the movable arc plate (202), and the lower limit arc plate (203) are provided. The casing body (101) has a sliding groove (103) inside that corresponds to the upper limit arc plate (201) and the lower limit arc plate (203). The upper limit arc plate (201) and the lower limit arc plate (203) are slidably disposed inside the casing body (101), and the two sets of movable arc plates (202) are rotatably disposed inside the casing body (101).
2. The recyclable steel casing for bored pile construction according to claim 1, characterized in that, Limiting blocks (205) are fixedly provided on the outer sides of the upper limit arc plate (201) and the lower limit arc plate (203). The limiting blocks (205) are convex blocks, and the inner side of the protective cylinder body (101) is provided with a limiting groove (211) corresponding to the limiting block (205).
3. The recyclable steel casing for bored pile construction according to claim 2, characterized in that, Compression springs (206) are provided on the upper surfaces of the limiting blocks (205) on the outer sides of the two sets of upper limit arc plates (201), and two other sets of compression springs (206) are provided on the lower surfaces of the limiting blocks (205) on the outer sides of the two sets of lower limit arc plates (203), and the four sets of compression springs (206) are located inside the corresponding limiting grooves (211).
4. The recyclable steel casing for bored pile construction according to claim 1, characterized in that, The lower surfaces of the two sets of movable arc plates (202) are provided with connecting columns (209), and the lower surfaces of the two sets of connecting columns (209) are provided with rotating rods (208). The two sets of movable arc plates (202) are rotatably mounted inside the casing body (101) via the rotating rods (208). The upper surface of the lower limiting arc plate (203) is provided with rotating grooves (207) corresponding to the two sets of rotating rods (208).
5. The recyclable steel casing for bored pile construction according to claim 1, characterized in that, The movable arc plate (202) is located between the upper limit arc plate (201) and the lower limit arc plate (203), and the movable arc plate (202) is in contact with both the upper limit arc plate (201) and the lower limit arc plate (203).
6. The recyclable steel casing for bored pile construction according to claim 1, characterized in that, The inner side of the casing body (101) is provided with a movable groove (212) corresponding to the two sets of movable arc plates (202), and the movable groove (212) is connected to the sliding groove (103).
7. The recyclable steel casing for bored pile construction according to claim 1, characterized in that, Both sets of movable arc plates (202) are fixedly provided with operating rods (210) on their outer sides, and the outer side of the protective cylinder body (101) is provided with through grooves (204) corresponding to the two sets of operating rods (210).
8. The recyclable steel casing for bored pile construction according to claim 1, characterized in that, The supporting arc plate (102) is disposed inside the casing body (101), and the upper limit arc plate (201), the movable arc plate (202) and the lower limit arc plate (203) are all in contact with the supporting arc plate (102).