Immersed tube and cast-in-place pile construction method of immersed tube

Abstract

The invention relates to the field of cast-in-place pile construction, in particular to an immersed tube and a cast-in-place pile construction method of the immersed tube, the immersed tube comprises a plurality of vertically stacked assembly tube bodies, in every two vertically adjacent assembly tube bodies, a jacking groove is vertically formed in the outer side wall of the assembly tube body with the higher height, and an inserting groove is formed in the assembly tube body with the lower height; the bottom of the assembly pipe body at the high position is matched with the assembly pipe body at the low position in an inserted connection mode through the inserted connection groove, and the assembly pipe body at the low position is in threaded connection with a fastening bolt abutting against the interior of the jacking groove. A proper number of splicing pipe bodies are selected, and the multiple splicing pipe bodies are assembled into the whole immersed pipe through insertion connection of every two adjacent splicing pipe bodies and cooperation of fastening bolts; a vibratory hammer is installed at the top of the immersed tube to hammer the immersed tube to compact surrounding soil, and after the immersed tube is driven into the designed depth, concrete is poured into the immersed tube from a funnel at the top of the immersed tube. The immersed tube has the advantages that the overall length of the immersed tube is flexibly adjusted, and then the immersed tube is suitable for pouring cast-in-place piles with different depths.

Description

Technical Field

[0001] The present application relates to the field of cast-in-place pile construction, and in particular to a sunken tube and a cast-in-place pile construction method for the sunken tube. Background Art

[0002] A sunken pipe cast-in-place pile is a pile that is made by sinking a steel casing with a valve-type pile tip or a prefabricated reinforced concrete pile shoe into the soil using hammer piling or vibration piling, and then pouring concrete while hammering and pulling out the pipe.

[0003] The pouring depth of bored piles required for different soil types may be different, while the immersed tubes used in traditional bored pile construction technology are usually one-piece and fixed in length. Therefore, when the pouring depth is different, only immersed tubes of different lengths can be used. The applicability of immersed tubes is poor and there are obvious shortcomings. Summary of the invention

[0004] In order to improve the applicability of a sunken tube for casting bored piles of different depths, the present application provides a sunken tube and a method for constructing bored piles of the sunken tube.

[0005] In the first aspect, the present application provides an immersed tube, which adopts the following technical solution: A submerged tube comprises a plurality of vertically stacked assembled tube bodies, wherein a top support groove is vertically opened on the outer side wall of the assembled tube body at a higher height among two vertically adjacent assembled tube bodies, and a plug-in groove is opened on the assembled tube body at a lower height, and the bottom of the assembled tube body at a higher height is plug-fitted with the assembled tube body at a lower height through the plug-in groove, and a fastening bolt which is threadedly connected to the assembled tube body at a lower height and is pressed against the top support groove is provided.

[0006] By adopting the above technical solution, workers select the appropriate number of assembled tubes according to the soil quality of the construction site and calculate the insertion depth between two adjacent assembled tubes. After that, the two adjacent assembled tubes are plugged in through the plug-in slots and the fastening bolts are tightened, so that multiple assembled tubes are assembled to form a full-length immersed tube. In this application, workers can select different numbers of assembled tubes to form immersed tubes of different lengths, which is suitable for the pouring of bored piles of different depths.

[0007] Optionally, a loading ring is arranged on the inner wall of each assembled tube body at a position opposite to the plug-in groove, a loading groove is opened downward on the top of the loading ring and the loading groove is filled with filler, a pressing plate covering the top of the filler is placed in the loading groove, a feeding groove opening for connecting the loading groove and the plug-in groove is opened on the loading ring, and a pressing plate member with an adjustable position and used to press the pressing plate is arranged near the bottom of each assembled tube body.

[0008] By adopting the above technical solution, workers pre-adjust the position of the pressure plate according to the depth of the plug-in fit between two adjacent assembled tubes. When two adjacent assembled tubes are plugged in, the pressure plate squeezes the filler through the material pressing plate, so that the filler is squeezed into the plug-in slot through the material passing slot, thereby providing strong support for the bottom of the assembled tube plugged in the plug-in slot.

[0009] Optionally, the pressure plate member includes a load-bearing ring that slides and fits tightly against the inner wall of the assembled tube body, the load-bearing ring is provided with a pressure arm for pressing the pressure plate, and the load-bearing ring is threadedly connected with a plurality of adjustment bolts for pressing against the inner wall of the assembled tube body.

[0010] By adopting the above technical solution, workers manually loosen and tighten the adjusting bolts to adjust the position of the load-bearing ring, and then adjust the timing of the pressure arm applying pressure to the pressure plate.

[0011] Optionally, the loading ring is slidably matched with the assembled tube body, and the loading ring is also provided with a material withdrawal slot for connecting the loading slot with the plug-in slot, and the material withdrawal slot is higher than the corresponding material passing slot.

[0012] By adopting the above technical solution, after the construction is completed, the loading ring moves downward until the withdrawal groove connects the plug-in groove with the loading groove. At this time, the worker manually pulls up the pressure plate, and the filler in the plug-in groove falls back into the loading groove through the withdrawal groove.

[0013] Optionally, an ear plate is arranged at the bottom of the loading ring, and a lifting groove is vertically opened on the ear plate. When the feeding groove is connected with the plug-in groove, the inner wall of the assembled tube body is threadedly connected with positioning bolts at the highest and lowest points of the lifting groove.

[0014] By adopting the above technical solution, when withdrawing the material, the worker unscrews the positioning bolts at a high position, so that the loading ring falls under the action of gravity until the top of the lifting groove is mounted on the positioning bolts at a low position. At this time, the withdrawal groove just connects the plug-in groove and the loading groove.

[0015] Optionally, the bottom wall of the plug-in slot is inclined downward toward the axis of the assembled tube body.

[0016] By adopting the above technical solution, it is beneficial for the filler in the plug-in slot to fall completely back into the charging slot.

[0017] Optionally, among two vertically adjacent assembled tube bodies, an elastic bag tube is arranged in the taller assembled tube body, and the top and bottom ends of the elastic bag tube are both open, with the top end connected to the position of the assembled tube body relative to the loading ring and the carrying ring, and the bottom end extending into the shorter assembled tube body, and the diameter of the elastic bag tube gradually decreases in a downward direction.

[0018] By adopting the above technical solution, the elastic bag tube plays a covering role on the charging ring, thereby reducing the possibility that concrete falls into the charging trough during pouring of concrete, resulting in the need for subsequent cleaning.

[0019] In the second aspect, the present application provides a method for constructing a cast-in-place pile of a sunken tube, which adopts the following technical solution: A method for constructing a cast-in-place pile of a sunken tube comprises the following steps: S1. Workers select a suitable number of assembled pipe bodies according to the soil quality of the construction site, and assemble multiple assembled pipe bodies into a whole immersed pipe by plugging two adjacent assembled pipe bodies together and tightening bolts; S2. Sleeve the prefabricated concrete pile head on the bottom of the immersed tube or use a flap pile shoe to sink it, align the immersed tube with the pile position and perform verticality correction; S3. Install a vibrating hammer on the top of the immersed tube to hammer the immersed tube to compact the surrounding soil. When the immersed tube is driven to the designed depth, pour concrete from the funnel on the top of the immersed tube; S4. Pull out the immersed tube upward while vibrating. When the concrete is poured to the set elevation, put the steel cage into the immersed tube. Continue pouring concrete and pulling out the tube until the immersed tube is completely pulled out after pouring to the designed height.

[0020] By adopting the above technical solution,

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The worker selects the appropriate number of assembled pipe bodies according to the soil quality of the construction site, and calculates the insertion depth between two adjacent assembled pipe bodies. After that, the two adjacent assembled pipe bodies are plugged into the plug-in slot, and the fastening bolts are tightened, so that multiple assembled pipe bodies are assembled to form a full-length immersed pipe. In this application, workers can flexibly select different numbers of assembled pipe bodies to form immersed pipes of different lengths, so as to be suitable for the pouring of bored piles of different depths; 2. According to the depth of the insertion between two adjacent assembled pipe bodies, the worker pre-adjusts the position of the pressure plate. When two adjacent assembled pipe bodies are inserted, the pressure plate squeezes the filler through the pressure plate, so that the filler is squeezed into the insertion groove through the material passing groove, thereby providing strong support for the bottom of the assembled pipe body inserted in the insertion groove. ; 3. The elastic bag tube covers the charging ring, reducing the possibility of concrete falling into the charging trough during pouring of concrete, resulting in the need for subsequent cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0023] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0024] Figure 3 yes Figure 2 Enlarged view of part A.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. Assembled tube body; 101. Top support groove; 102. Plug-in groove; 2. Fastening bolt; 3. Loading ring; 31. Loading groove; 32. Feeding slot; 33. Feeding slot; 4. Filler; 5. Pressing plate; 6. Loading ring; 7. Pressing arm; 8. Adjusting bolt; 9. Ear plate; 91. Lifting slot; 10. Positioning bolt; 11. Elastic bag tube. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-3 This application is described in further detail.

[0027] The embodiment of the present application discloses an immersed tube.

[0028] Reference Figure 1 , Figure 2 and Figure 3 The immersed tube includes a plurality of vertically stacked assembled tube bodies 1. Among two vertically adjacent assembled tube bodies 1, a top support groove 101 is vertically opened on the outer wall of the assembled tube body 1 with a higher height, and a plug-in groove 102 is vertically opened on the top of the assembled tube body 1 with a lower height.

[0029] The bottom of the assembled pipe body 1 at a higher height is plugged into and matched with the assembled pipe body 1 at a lower height through the plug-in groove 102 , and the assembled pipe body 1 at the lower height is threadedly connected with a fastening bolt 2 that is tightly pressed against the top support groove 101 .

[0030] Reference Figure 2 and Figure 3 The worker selects a suitable number of assembled tube bodies 1, and then assembles the multiple assembled tube bodies 1 to form an integral immersed tube. During the assembly process, two adjacent assembled tube bodies 1 are plugged into each other through the plug-in grooves 102, and the plug-in depth is determined, and then the fastening bolts 2 are tightened.

[0031] Different numbers of assembled pipe bodies 1 and different insertion depths of two adjacent assembled pipe bodies 1 can both adjust the overall length of the immersed pipe, thereby being suitable for the pouring of bored piles at different depths.

[0032] Reference Figure 2 and Figure 3 The insertion depth between two adjacent assembled pipe bodies 1 is maintained by the interference of the fastening bolts 2 on the top support groove 101. There will be a gap between the bottom wall of the assembled pipe body 1 with a higher height and the bottom wall of the insertion groove 102. Therefore, when the assembled pipe body 1 is hammered by a vibrating hammer, the two adjacent assembled pipe bodies 1 will move relative to each other, resulting in a shortening of the overall length of the immersed pipe, making it impossible to cast the bored pile to the required depth.

[0033] To this end, a loading ring 3 is slidably fitted and tightly attached to the inner wall of each assembled tube body 1 relative to the plug-in groove 102, a loading groove 31 is opened downward at the top of the loading ring 3 and the loading groove 31 is filled with filler 4, and a pressing plate 5 is placed in the loading groove 31 to cover the top of the filler 4.

[0034] A feeding notch 32 and a material withdrawal notch 33 are formed on the outer wall of the charging ring 3 in a circumferential direction. The material withdrawal notch 33 is located above the feeding notch 32 . Both the material withdrawal notch 33 and the feeding notch 32 are used to connect the plug-in slot 102 and the charging slot 31 .

[0035] Reference Figure 2 and Figure 3 A pressing plate is arranged near the bottom of each assembled tube body 1. The position of the pressing plate is adjustable and is used to press the pressing plate 5.

[0036] The pressure plate component includes a load-bearing ring 6 that slides and fits tightly with the inner wall of the assembled tube body 1. The load-bearing ring 6 is circumferentially bolted with multiple pressure arms 7 for pressing on the pressure plate 5. The load-bearing ring 6 is also threadedly connected with multiple adjustment bolts 8 that press against the inner wall of the assembled tube body 1.

[0037] Reference Figure 2 and Figure 3 The bottom of the charging ring 3 is integrally formed with an ear plate 9, and a lifting groove 91 is vertically opened on the ear plate 9. The inner wall of the assembled tube body 1 is bolted relative to the position in the lifting groove 91 with two positioning bolts 10 distributed upward and downward.

[0038] Reference Figure 2 and Figure 3 When a worker manually assembles two adjacent assembled tube bodies 1, the material passage notch 32 connects the plug-in groove 102 with the loading groove 31, and the pressing arm 7 extends into the loading groove 31 to press the pressing plate 5 downward. The pressing plate 5 squeezes the filler 4 in the loading groove 31 into the plug-in groove 102, thereby providing strong support for the bottom of the assembled tube body 1 inserted into the plug-in groove 102. At this time, the two positioning bolts 10 are respectively located at the top and bottom ends of the lifting groove 91.

[0039] Reference Figure 2 and Figure 3 After the construction is completed, the workers unscrew the positioning bolts 10 at the high position, and the loading ring 3 falls under the action of gravity. When the top of the lifting groove 91 contacts the positioning bolts 10 at the low position, the return groove 33 connects the plug-in groove 102 with the loading groove 31, and the filler 4 in the plug-in groove 102 can fall back into the loading groove 31.

[0040] Reference Figure 2 and Figure 3 After the material is returned, the loading ring 3 is pulled up to a higher position again, and the removed positioning bolts 10 are tightened again on the top of the lifting slot 91 .

[0041] The bottom wall of the plug-in groove 102 is inclined downward toward the axis of the assembled tube body 1 , which is beneficial to improve the completeness of the return of the filler 4 from the plug-in groove 102 to the charging groove 31 .

[0042] Reference Figure 2 and Figure 3 In two vertically adjacent assembled tube bodies 1, an elastic bag tube 11 is arranged in the assembled tube body 1 with a higher height. The top and bottom ends of the elastic bag tube 1 are both open. The top end is bonded to the position of the assembled tube body 1 relative to the loading ring 3 and the carrying ring 6, and the bottom end extends into the assembled tube body 1 with a lower height. The diameter of the elastic bag tube 11 gradually decreases from top to bottom.

[0043] The elastic bag tube 11 covers the charging ring 3, thereby reducing the possibility that concrete falls into the charging trough 31 during pouring of concrete, which results in the need for subsequent cleaning.

[0044] The implementation principle of Example 1 is as follows: according to the actual soil quality of the construction site, the pouring depth of the bored pile is determined, the worker selects a suitable number of assembled pipe bodies 1, and calculates the insertion depth between two adjacent assembled pipe bodies 1.

[0045] Before assembly, the worker pre-adjusts the position of the pressing arm 7. During assembly, two adjacent assembled pipe bodies 1 are plugged into the plug-in slot 102, and the pressing arm 7 extends into the charging slot 31 to press the pressing plate 5 downward, and the pressing plate 5 presses the filler 4 in the charging slot 31 into the plug-in slot 102, and then the fastening bolt 2 is tightened.

[0046] After the construction is completed, the worker unscrews the positioning bolts 10 at the high position, and the loading ring 3 falls down under the action of gravity. When the top of the lifting groove 91 contacts the positioning bolts 10 at the low position, the material withdrawal slot 33 connects the plug-in slot 102 with the loading groove 31, and the filler 4 in the plug-in slot 102 can fall back into the loading groove 31. After the material withdrawal is completed, the loading ring 3 is pulled up to a high position again, and the unscrewed positioning bolts 10 are tightened again on the top of the lifting groove 91.

[0047] Example 2 Embodiment 2 of the present application discloses a method for constructing a cast-in-place pile with a sunken pipe, comprising the following steps: S1. The worker determines the pouring depth of the cast-in-place pile according to the soil quality of the construction site and selects the appropriate number of assembled pipe bodies 1. The worker first pre-adjusts the position of the pressure arm 7, then plugs and matches two adjacent assembled pipe bodies 1 through the plug-in slot 102, and the pressure arm 7 extends into the charging slot 31 to press the pressure plate 5 downward, and the pressure plate 5 squeezes the filler 4 in the charging slot 31 into the plug-in slot 102, and then tightens the fastening bolt 2; S2. Sleeve the prefabricated concrete pile head on the bottom of the immersed tube or use a flap pile shoe to sink it, align the immersed tube with the pile position and perform verticality correction; S3. Install a vibrating hammer on the top of the immersed tube to hammer the immersed tube to compact the surrounding soil. When the immersed tube is driven to the designed depth, pour concrete from the funnel on the top of the immersed tube; S4. Pull out the immersed tube upward while vibrating. When the concrete is poured to the set elevation, put the steel cage into the immersed tube. Continue pouring concrete and pulling out the tube until the immersed tube is completely pulled out after pouring to the designed height.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An immersed tube, comprising a plurality of vertically stacked assembled tube bodies (1), characterized in that: In two vertically adjacent assembled tube bodies (1), a top support groove (101) is vertically opened on the outer side wall of the assembled tube body (1) at a higher height, and a plug-in groove (102) is opened on the assembled tube body (1) at a lower height. The bottom of the assembled tube body (1) at a higher height is plugged and matched with the assembled tube body (1) at a lower height through the plug-in groove (102), and a fastening bolt (2) is threadedly connected on the assembled tube body (1) at a lower height and is tightly pressed against the top support groove (101).

2. The immersed tube according to claim 1, characterized in that: A loading ring (3) is arranged on the inner side wall of each assembled tube body (1) at a position relative to the plug-in groove (102); a loading groove (31) is opened downward at the top of the loading ring (3) and the loading groove (31) is filled with a filler (4); a pressing plate (5) covering the top of the filler (4) is placed in the loading groove (31); a material passage opening (32) for connecting the loading groove (31) and the plug-in groove (102) is opened on the loading ring (3); and a pressing plate member with an adjustable position and used for pressing the pressing plate (5) is arranged near the bottom of each assembled tube body (1).

3. The immersed tube according to claim 2, characterized in that: The pressure plate member comprises a bearing ring (6) which is slidably matched and tightly fitted with the inner wall of the assembled tube body (1); a pressure arm (7) is arranged on the bearing ring (6) for pressing against the pressure plate (5); and a plurality of adjustment bolts (8) are threadedly connected on the bearing ring (6) for pressing against the inner wall of the assembled tube body (1).

4. The immersed tube according to claim 3, characterized in that: The loading ring (3) is slidably matched with the assembled tube body (1), and a material withdrawal slot (33) for connecting the loading slot (31) with the plug-in slot (102) is also formed on the loading ring (3), and the material withdrawal slot (33) is higher than the corresponding material passing slot (32).

5. The immersed tube according to claim 2, characterized in that: An ear plate (9) is arranged at the bottom of the charging ring (3), and a lifting groove (91) is vertically opened on the ear plate (9). When the feeding groove opening (32) is connected with the plug-in groove (102), the inner wall of the assembled tube body (1) is threadedly connected with positioning bolts (10) at the highest and lowest positions of the lifting groove (91).

6. The immersed tube according to claim 1, characterized in that: The bottom wall of the insertion groove (102) is inclined downward toward the axis of the assembled tube body (1).

7. The immersed tube according to claim 4, characterized in that: Of the two vertically adjacent assembled tube bodies (1), an elastic bag tube (11) is arranged in the assembled tube body (1) with a higher height, and the top and bottom ends of the elastic bag tube (11) are both open, with the top end connected to the position of the assembled tube body (1) relative to the charging ring (3) and the bearing ring (6), and the bottom end extending into the assembled tube body (1) with a lower height, and the diameter of the elastic bag tube (11) gradually decreases in a direction from top to bottom.

8. A method for constructing cast-in-place piles of a pipe sinking system according to any one of claims 1 to 7, characterized in that: The steps include: S1. Workers select a suitable number of assembled pipe bodies (1) according to the soil quality of the construction site, and assemble the multiple assembled pipe bodies (1) into a whole immersed pipe by plugging two adjacent assembled pipe bodies (1) together with fastening bolts (2); S2. Sleeve the prefabricated concrete pile head on the bottom of the immersed tube or use a flap pile shoe to sink it, align the immersed tube with the pile position and perform verticality correction; S3. Install a vibrating hammer on the top of the immersed tube to hammer the immersed tube to compact the surrounding soil. When the immersed tube is driven to the designed depth, pour concrete from the funnel on the top of the immersed tube; S4. Pull out the immersed tube upward while vibrating. When the concrete is poured to the set elevation, put the steel cage into the immersed tube. Continue pouring concrete and pulling out the tube until the immersed tube is completely pulled out after pouring to the designed height.

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