A method for constructing piles with full casing and interlocking by long spiral drilling and pressure-casting

Abstract

The present application discloses a full-casing interlocking pile construction method for long spiral drilling and pressure-casting piles, which relates to the field of interlocking pile construction and comprises the following steps: step 1, opening two raw pile holes at a construction location; step 2, inserting a mold column at the center of the raw pile hole; step 3, pouring concrete between the raw pile hole and the mold column to form a raw pile; step 4, inserting a casing between two raw piles after the raw pile is initially set and before the raw pile is finally set; a plurality of through holes are opened on the side wall of the casing in a vertical direction; step 5, taking out the soil in the casing to form a raw pile hole; step 6, taking out the mold column to form a pouring hole; step 7, fixing a cylinder in the raw pile hole, a connecting pipe sliding in the fixing cylinder, and a driving member for driving the connecting pipe to slide being arranged on the fixing cylinder. When pouring the raw pile, the pouring hole on the raw pile is connected with the raw pile hole, so that when pouring concrete, the concrete in the raw pile hole and the pouring hole can form a whole after solidification and penetrate the raw pile, thereby improving the interlocking force between the raw pile and the raw pile.

Description

Technical Field

[0001] The present application relates to the field of interlocking pile construction, and in particular to a full-casing interlocking pile construction method for long spiral drilling and pressure-casting piles. Background Art

[0002] Interlocking piles are a type of foundation pit retaining structure in which the piles are arranged in an interlocking manner; the interlocking of the interlocking piles can enhance the stability of the foundation pit retaining structure.

[0003] In the related art, the interlocking pile unit generally includes two plain piles and one steel pile. During the construction of the plain pile, a plain pile hole is formed by drilling a long spiral drill, and then concrete is poured into the plain pile hole to form a plain pile. After the initial setting and before the final setting of the plain pile, a casing is inserted between the two plain piles, and the casing is used to cut the two plain piles. Then, the soil in the casing is taken out by a long spiral drill to form a steel pile hole, and then a steel cage is inserted into the steel pile hole and concrete is poured to form a steel pile. The steel pile and the two plain piles interlock with each other to form an interlocking pile.

[0004] Regarding the above-mentioned related technologies, the inventors believe that since the raw piles are cast after the initial solidification, the bite force of the contact parts between the raw piles and the raw piles is limited, and the stability of the piles after they are combined to form a row is not very high. Summary of the invention

[0005] In order to improve the bite force between plain piles and wooden piles, the present application provides a full-casing bite pile construction method for long spiral drilling and pressure-casting piles.

[0006] The present application provides a method for constructing a long spiral bored and cast-in-place pile with a full casing interlocking pile, which adopts the following technical solution:

[0007] A full-casing interlocking pile construction method for long spiral drilling and pressure-casting piles comprises the following steps: step 1, opening two raw pile holes at a construction location; step 2, inserting a mold column into the center of the raw pile hole; step 3, pouring concrete between the raw pile hole and the mold column to form a raw pile; step 4, inserting a casing between the two raw piles after the raw pile is initially set and before the raw pile is finally set, and cutting the two raw piles; a plurality of perforations are opened on the side wall of the casing in a vertical direction; step 5, taking out the soil in the casing to form a raw pile hole; step 6 , take out the mold column to form a casting hole for the plain pile; step 7, insert a hole-opening component into the hole of the pile, the hole-opening component includes a fixed cylinder, and two connecting pipes arranged opposite to each other are connected in a radial sliding manner inside the fixed cylinder, the two connecting pipes slide to pass through the two plain piles respectively through the holes, and the hole-opening component also includes a driving member for driving the connecting pipes to slide; step 8, take out the fixed cylinder and the sleeve; step 9, insert a steel cage into the hole of the pile, and then pour concrete in the hole of the pile and the casting hole.

[0008] By adopting the above technical scheme, the driving part drives the connecting pipe to slide, so that the connecting pipe can penetrate the plain pile, so that the casting hole and the meat pile hole are connected. When pouring concrete in the meat pile hole and the casting hole, the concrete slurry in the meat pile hole and the concrete slurry in the casting hole can flow with each other, and the concrete poured in the meat pile hole and the casting hole are poured at the same time, so that the solidification time is consistent, and the casting hole and the meat pile hole are connected through the connecting pipe, so that the concrete in the meat pile hole and the casting hole can form a whole after solidification and penetrate the plain pile. The bite force between the plain pile and the meat pile formed by this construction method is stronger.

[0009] Optionally, the driving member includes an air pump, the fixed cylinder is hollow, a guide tube for the connecting tube to slide is connected to the outer wall of the fixed cylinder, and the air pump inflates the fixed cylinder to enable the connecting tube to slide.

[0010] By adopting the above technical solution, when driving the connecting pipe to slide, the air pump is turned on to inflate the fixed cylinder, so that the connecting pipe can slide under the action of air pressure; the driving component has a simple structure and is easy to operate.

[0011] Optionally, both ends of the guide tube are through-set, and a piston plate is slidably connected inside the guide tube along its length direction, and the piston plate slides to push the connecting tube out of the guide tube.

[0012] By adopting the above technical solution, when the fixed cylinder is inflated, the piston plate moves outward, so that the connecting tube can be pushed out, so that the connecting tube can be inserted into the pile, connecting the casting hole and the pile hole. After the connecting tube is inserted into the pile, it can play a certain supporting role on the pile.

[0013] Optionally, one end of the connecting pipe close to the piston plate is arranged in an inclined surface, and the inclined surface gradually approaches the piston plate from bottom to top.

[0014] By adopting the above technical solution, after the connecting tube is inserted into the plain pile, part of the connecting tube may be located in the perforation on the sleeve, thereby affecting the removal of the sleeve. One end of the connecting tube is set as an inclined surface, so that when the sleeve is pulled out, the vertical force of the sleeve on the connecting tube is decomposed into a horizontal force on the connecting tube through the action of the inclined surface, which will never affect the removal of the sleeve.

[0015] Optionally, an insertion rod is fixedly connected to the piston plate, and a slot for inserting the insertion rod is provided on the connecting tube; an airbag is provided on the insertion rod, and an inflatable member for inflating the airbag is provided in the guide tube.

[0016] By adopting the above technical solution, when installing the connecting pipe, the connecting pipe is inserted into the guide pipe, and the insertion rod is inserted into the slot, and then the airbag is inflated through the inflatable piece to expand the airbag, thereby ensuring the stability of the connecting pipe. When the connecting pipe needs to be inserted into the plain pile, the airbag can be deflated through the inflatable piece.

[0017] Optionally, the inflatable part includes a movable plate, and the piston plate is provided with an inflation groove on one side for abutting against the inner wall of the guide tube, the movable plate is slidably connected in the inflation groove, a spring is fixedly connected in the inflation groove for driving the movable plate to be partially located outside the inflation groove and abut against the inner wall of the guide tube, the inflation groove is connected to the airbag, a ramp is fixedly connected to the inner wall of the guide tube, and the piston plate moves toward the fixed cylinder to allow the movable plate to slide into the inflation groove.

[0018] By adopting the above technical solution, when the connecting tube is inserted into the guide tube, the movable plate on the connecting tube continues to move the connecting tube after contacting the inclined block, and the inclined block pushes the movable plate into the inflation groove, thereby inflating the airbag. When the fixed tube is inflated by the air pump, the connecting tube is moved away from the inclined block under the action of the piston plate, so that the movable plate is reset under the action of the spring, thereby deflating the airbag, so that the connecting tube can be inserted into the pile. The driving member has a simple structure and is easy to operate.

[0019] Optionally, a sealing gasket is fixedly connected to one side of the movable plate that is used to abut against the guide tube.

[0020] By adopting the above technical solution, the sealing between the piston plate and the inner wall of the guide tube is enhanced.

[0021] Optionally, a guide rod is fixedly connected to the outer wall of the guide tube, and a groove for vertically inserting the guide rod is opened on the inner wall of the fixed cylinder. When the connecting tube and the through hole are aligned, the guide rod is stuck in the groove.

[0022] By adopting the above technical solution, when the fixing tube is inserted into the pile hole, the guide rod is stuck in the groove, thereby facilitating the alignment of the connecting tube and the through hole so that the connecting hole can be inserted into the through hole.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] 1. In the present application, when pouring the meat pile, the pouring hole on the plain pile is connected with the meat pile hole, so that when pouring concrete, the meat pile hole and the concrete in the pouring hole can form a whole after solidification and penetrate the plain pile, so the bite strength between the plain pile and the meat pile formed by this construction method is higher;

[0025] 2. In the present application, the connecting pipe is left in the plain pile to ensure the stability of the plain pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view of the overall structure of a full-casing interlocking pile construction method for long spiral drilling and grouting piles according to an embodiment of the present application;

[0027] Figure 2 yes Figure 1 A cross-sectional view of

[0028] Figure 3 yes Figure 2 A magnified schematic diagram of area A in the middle.

[0029] Description of reference numerals:

[0030] 1. Plain pile; 2. Mould column; 3. Casing; 4. Perforation; 5. Cement pile hole; 6. Fixing tube; 7. Guide tube; 8. Piston plate; 9. Connecting tube; 10. Inflating tube; 11. Guide rod; 12. Groove; 13. Insert rod; 14. Slot; 15. Airbag; 16. Movable plate; 17. Spring; 18. Sealing pad; 19. Inclined block; 20. Inflating groove; 21. Inclined surface; 22. Slide groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application discloses a method for constructing a pile row with a full casing 3-bite engagement by long spiral drilling and pressure-casting. Figure 1 and Figure 2 , the construction method comprises the following steps:

[0033] Step 1: Drill two holes for two piles at the construction location using a long spiral drill;

[0034] Step 2, inserting mold column 2 into the center of the hole of the pile 1;

[0035] Step 3, pouring concrete between the pile hole 1 and the mold column 2 to form the pile 1; during pouring, a concrete pump truck can be used to transport the concrete to the space between the pile hole 1 and the mold column 2 through a pouring pipe;

[0036] Step 4: After the initial setting and before the final setting of the white pile 1, the strength of the white pile 1 is tested. After the strength of the white pile 1 is appropriate, a sleeve 3 is inserted between the two white piles 1, and the two white piles 1 are cut; two rows of perforations 4 are equidistantly provided on the side wall of the sleeve 3 in the vertical direction, and each row of perforations 4 is provided in a plurality along the height direction of the sleeve 3; when the sleeve 3 is inserted, the two rows of perforations 4 are respectively located at the positions of the two white piles 1;

[0037] Step 5: Take out the soil in the casing 3 by using a long spiral drill to form a pile hole 5;

[0038] Step 6, taking out the mold column 2, so that the plain pile 1 forms a pouring hole; (in this embodiment, step 6 can be located after step 3 and before step 7);

[0039] Step 7: Reference Figure 2 and Figure 3 , insert the hole opening component into the pile hole 5 by a crane, the hole opening component includes a fixed cylinder 6, the fixed cylinder 6 is hollow, and two groups of guide members are equidistantly arranged in the fixed cylinder 6 along its own radial direction, each group of guide members includes a plurality of guide tubes 7, the guide tubes 7 are rectangular, and the plurality of guide tubes 7 of each group of guide members are equidistantly arranged along the height direction of the fixed cylinder 6, and the guide tubes 7 are connected to the fixed cylinder 6, the number of each group of guide tubes 7 is consistent with the number of each row of perforations 4, and one-to-one correspondence, a piston plate 8 is slidably connected in the guide tube 7 along its own length direction, and a connecting tube 9 is arranged on the outside of the piston plate 8 of the guide tube 7, both ends of the connecting tube 9 are through-arranged, and the outer wall of the connecting tube 9 is adapted to the inner wall of the guide tube 7; the piston plate 8 slides to push the connecting tube 9 out of the guide tube 7, and the connecting tube 9 passes through the pile 1 through the perforation 4 during the process of moving out of the guide tube 7, and the hole opening component also includes a driving member for driving the piston plate 8 to slide; in this step, since the pile 1 has not been finally set and the strength is not very high, the connecting tube 9 can be driven out of the pile 1 by the driving member;

[0040] The driving member includes an air pump, and the upper end of the fixed cylinder 6 is connected to an air charging pipe 10, and the air charging pipe 10 is used to connect to an external air pump;

[0041] In order to prevent the piston plate 8 from being separated from the guide tube, a sliding block is fixed on the side wall of the piston plate 8, and a sliding groove 22 for the sliding block to slide is opened on the inner wall of the guide tube, and the sliding groove 22 is not set to penetrate.

[0042] Reference Figure 1 and Figure 3 In addition, in order to ensure that when the fixed tube 6 is placed in the pile hole 5, the through hole 4 and the guide tube are aligned, the bottom surface of the pile hole 5 can be leveled by a heavy hammer, and the guide rod 11 is fixedly connected to the outer wall of the fixed tube 6, and a groove 12 for the guide rod 11 to be inserted and vertically slide is provided on the inner wall of the sleeve 3. When the connecting tube 9 and the through hole 4 are aligned, the guide rod 11 is stuck in the groove 12;

[0043] Reference Figure 2 and Figure 3In addition, in order to ensure the stability of the connecting tube 9 when the fixed tube 6 is lowered into the pile hole 5, a plug rod 13 is fixedly connected to the end of the piston plate 8 away from the fixed tube 6, and a slot 14 for inserting the plug rod 13 is provided on the connecting tube 9. The length direction of the plug rod 13 is arranged along the length direction of the guide tube, and an air bag 15 is sleeved and fixedly connected to the plug rod 13. After the plug rod 13 is inserted into the slot 14, the air bag 15 is inflated by the inflatable piece to expand the air bag 15, thereby increasing the friction between the plug rod 13 and the inner wall of the slot 14, preventing the connecting tube 9 from falling from the guide tube; and when the connecting tube 9 needs to be pushed out of the guide tube 7, the air bag 15 can be deflated by the inflatable piece;

[0044] The inflatable member includes a movable plate 16, an inflating groove 20 is provided on the upper surface of the piston plate 8, the movable plate 16 is slidably connected in the inflating groove 20, a spring 17 is fixedly connected in the inflating groove 20 for driving the movable plate 16 to be located outside the inflating groove 20 and abutting against the inner wall of the guide tube, the inflating groove 20 is connected to the airbag 15, an inclined block 19 is fixedly connected to the inner wall of the guide tube, the height of the inclined block 19 gradually decreases in the direction away from the fixed tube 6, and the piston plate 8 moves toward the fixed tube 6 to make the movable plate 16 slide into the inflating groove 20;

[0045] In order to ensure the seal between the piston plate 8 and the guide tube, a sealing gasket 18 is fixedly connected to the upper surface of the movable plate 16 , and the sealing gasket 18 is made of rubber material.

[0046] Step 8, take out the fixing tube 6 and the sleeve 3 by a crane; when taking out the sleeve 3, in order to prevent the connecting tube 9 from being partially located in the through hole 4 of the sleeve 3 and affecting the taking out of the sleeve 3, an inclined surface 21 is provided at one end of the connecting tube 9 close to the piston plate 8, and the inclined surface 21 gradually approaches the piston plate 8 from bottom to top;

[0047] Step 9: insert the steel cage into the pile hole 5, and then pour concrete into the pile hole 5 and the pouring hole.

[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. A method for constructing piles by full casing engagement with long spiral drilling and pressure-casting, characterized in that: The method comprises the following steps: step 1, opening two holes for raw piles (1) at a construction location; step 2, inserting a mold column (2) at the center of the hole for raw piles (1); step 3, pouring concrete between the hole for raw piles (1) and the mold column (2) to form a raw pile (1); step 4, inserting a sleeve (3) between the two raw piles (1) after the raw piles (1) have initially set and before they have finally set, and cutting the two raw piles (1); a plurality of through holes (4) are formed on the side wall of the sleeve (3) in a vertical direction; step 5, taking out the soil in the sleeve (3) to form a raw pile hole (5); step 6, taking out the mold column (2) to form a pouring hole in the raw pile (1); step 7, inserting a hole-opening component into the raw pile hole (5), the hole-opening component comprising a fixed The fixing cylinder (6) is provided with two communicating tubes (9) which are arranged opposite to each other and are slidably connected in the radial direction of the fixing cylinder (6). The two communicating tubes (9) slide to pass through the two plain piles (1) respectively through the perforations (4). The hole-opening assembly further comprises a driving member for driving the communicating tubes (9) to slide. Step 8: taking out the fixing cylinder (6) and the sleeve (3); Step 9: inserting a steel cage into the plain pile hole (5), and then pouring concrete into the plain pile hole (5) and the pouring hole. The driving member comprises an air pump. The fixing cylinder (6) is hollow. The outer wall of the fixing cylinder (6) is connected with a guide tube (7) for the communicating tubes (9) to slide. The air pump inflates the fixing cylinder (6) to make the fixing cylinder (6) The connecting tube (9) slides; both ends of the guide tube (7) are through-set, and a piston plate (8) is slidably connected in the guide tube (7) along its length direction, and the piston plate (8) slides to push the connecting tube (9) out of the guide tube (7); the end of the connecting tube (9) close to the piston plate (8) is provided with an inclined surface (21), and the inclined surface (21) gradually approaches the piston plate (8) from bottom to top; an insertion rod (13) is fixedly connected to the piston plate (8), and a slot (14) for inserting the insertion rod (13) is provided on the connecting tube (9); an air bag (15) is provided on the insertion rod (13), and a gas bag (15) is provided in the guide tube (7) for inserting the gas bag (15) an inflatable inflatable part; the inflatable part comprises a movable plate (16), a piston plate (8) having an inflating groove (20) on one side thereof for abutting against the inner wall of the guide tube (7), the movable plate (16) being slidably connected in the inflating groove (20), a spring (17) being fixedly connected in the inflating groove (20) for driving the movable plate (16) to be located outside the inflating groove (20) and abutting against the inner wall of the guide tube (7), the inflating groove (20) being connected to the airbag (15), an inclined block (19) being fixedly connected to the inner wall of the guide tube (7), the piston plate (8) moving toward the fixed cylinder (6) to allow the movable plate (16) to slide into the inflating groove (20).

2. The method for constructing piles by full casing engagement of long spiral drilling and grouting according to claim 1 is characterized by: The movable plate (16) is used to abut against a side of the guide tube (7) and is fixedly connected to a sealing gasket (18).

3. The method for constructing piles by full casing engagement of long spiral drilling and grouting according to claim 1 is characterized by: A guide rod (11) is fixedly connected to the outer wall of the fixed cylinder (6), and a groove (12) is provided on the inner wall of the sleeve (3) for vertically inserting the guide rod (11). When the connecting tube (9) and the through hole (4) are aligned, the guide rod (11) is stuck in the groove (12).

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