A method for construction of a mud-curtain bored pile based on a perfusion auxiliary device

Abstract

The application discloses a mud wall protection bored pile construction method based on a pouring auxiliary device, and comprises the following steps: expanding a pile head; hoisting and installing a protection cylinder; installing a cover plate; constructing a bored pile hole; and pouring concrete into the bored pile.The cover plate is opened when a drilling machine is used to form a bored pile hole, and the device only plays a protection cylinder role; after the hole forming is completed, the cover plate is covered, and concrete pouring work is completed through a concrete pouring pipe arranged below the middle of the cover plate; in the construction process, the construction quality can be ensured, and hole collapse can be avoided; mud blocks can be prevented from falling into the bored pile hole from the hole during pouring, and pile forming quality is improved; construction safety can be improved, and workers can be prevented from stepping into the bored pile hole by mistake during the construction process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building construction, and particularly relates to a mud wall protection bored pile construction method based on a pouring auxiliary device. BACKGROUND

[0002] A bored pile is a pile made by pouring concrete or reinforced concrete into a hole formed in place. The bored pile is a widely used pile foundation form in building construction and is used for reinforcing a foundation. According to the hole forming method, the bored pile can be divided into a pipe sinking bored pile, a drilled bored pile, a manual hole digging bored pile and the like. The construction of the drilled bored pile has mud wall protection construction and full casing construction due to different selected wall protections. The existing mud wall protection drilled bored pile construction has the problem of pile body quality caused by hole collapse, and has a safety hazard in the pile hole construction process. SUMMARY

[0003] The technical problem to be solved by the application is to provide a mud wall protection bored pile construction method based on a pouring auxiliary device according to the above-mentioned deficiencies in the prior art. The device only has a casing function when the pile hole is formed by the drilling machine. After the hole forming is completed, the cover plate is covered, and the concrete pouring pipe under the middle of the cover plate is used to complete the concrete pouring work. In the construction process, the construction quality can be ensured, and hole collapse can be avoided. The mud blocks are prevented from falling into the bored pile hole during the pouring process, the pile forming quality is improved, the construction safety is improved, and the operator is prevented from stepping into the bored pile hole during the construction process.

[0004] To solve the above technical problems, the technical scheme adopted by the application is as follows: a mud wall protection bored pile construction method based on a pouring auxiliary device, characterized in that the method comprises the following steps:

[0005] Step one, expanding the pile head: after the pile head construction is completed, the pile head is expanded outward along the circumferential direction of the pile head by using a drilling machine reamer, to form an annular expansion area; wherein the major circle diameter of the annular expansion area is greater than the outer diameter of the casing, and the depth of the annular expansion area is equal to the depth of the casing buried in the ground;

[0006] Step two, hoisting and installing the casing: the casing is hoisted to the upper side of the annular expansion area by using a crane, and the casing is vertically lowered until the connecting ring on the periphery of the casing abuts against the ground, and the lowering is stopped;

[0007] Step three, install the cover plate: hinge the cover plate on the top of the casing, and install the pouring hole adjusting device on the cover plate, the casing, the cover plate, and the pouring hole adjusting device form a pouring auxiliary device at the pile head; wherein the middle part of the cover plate is provided with a pouring hole, the center of the pouring hole coincides with the center of the casing;

[0008] Step four, construction of cast-in-place pile hole: open the cover plate, the drilling machine drills vertically downward from the casing until the cast-in-place pile hole drilling is completed, and the cover plate is closed;

[0009] Step five, concrete pouring of cast-in-place pile: adjust the pouring hole adjusting device to expose the pouring hole, lower the concrete pouring pipe from the pouring hole to the bottom of the cast-in-place pile hole, lift the concrete pouring pipe while pouring the cast-in-place pile, until the height of the concrete is flush with the ground, stop pouring concrete and withdraw the concrete pouring pipe from the pouring hole.

[0010] The mud wall cast-in-place pile construction method based on the pouring auxiliary device, characterized in that: in step one, the major diameter of the annular enlarged area is 5 cm larger than the outer diameter of the casing.

[0011] The mud wall cast-in-place pile construction method based on the pouring auxiliary device, characterized in that: in step two, the thickness of the casing is not less than 3 mm, the depth of the casing inserted into the annular enlarged area is not less than 500 mm, and the height of the casing above the ground is not more than 500 mm.

[0012] The mud wall cast-in-place pile construction method based on the pouring auxiliary device, characterized in that: in step two, the connecting ring is horizontally welded at the connection between the ground and the casing, and a plurality of stiffening plates are welded between the connecting ring and the side wall of the casing; wherein the connecting ring is arranged along the circumferential direction of the casing, and a plurality of the stiffening plates are uniformly arranged along the circumferential direction of the casing.

[0013] The mud wall cast-in-place pile construction method based on the pouring auxiliary device, characterized in that: in step two, the thickness of the connecting ring is not less than 3 mm, and the width of the connecting ring is 200 mm to 300 mm; the stiffening plate is a right triangle plate, the thickness of the stiffening plate is 5 mm to 10 mm; and the stiffening plate is provided with a lifting hole.

[0014] The mud wall cast-in-place pile construction method based on the pouring auxiliary device, characterized in that: two rectangular holes are symmetrically provided on the casing, the rectangular holes are arranged on the cylinder segment of the casing above the ground, and the rectangular holes are arranged between two stiffening plates.

[0015] The mud wall cast-in-place pile construction method based on the pouring auxiliary device has the characteristics that one side of the casing and the cover plate is connected through a hinge, and the other side of the cover plate is provided with a buckle connected with the casing.

[0016] The mud wall cast-in-place pile construction method based on the pouring auxiliary device has the characteristics that the pouring hole adjusting device comprises two symmetrical circular spring locking tongues arranged on both sides of the pouring hole and an adjusting assembly arranged on the top of the cover plate and connected with the circular spring locking tongues, the circular spring locking tongues and the adjusting assembly are connected through a steel wire rope, a guide assembly is arranged on the side of the circular spring locking tongue away from the pouring hole, and a tension spring is connected between the two circular spring locking tongues.

[0017] The mud wall cast-in-place pile construction method based on the pouring auxiliary device has the characteristics that the guide assembly comprises a guide plate horizontally arranged on the top of the cover plate and arranged on the side of the circular spring locking tongue away from the pouring hole, a guide groove is horizontally arranged on the guide plate, a guide pin is arranged in the guide groove, a through hole is arranged on the guide pin and through which the steel wire rope passes, one end of the steel wire rope is connected to the circular spring locking tongue, and the other end of the steel wire rope is connected to the adjusting assembly after passing through the through hole on the guide pin.

[0018] The mud wall cast-in-place pile construction method based on the pouring auxiliary device has the characteristics that the guide assembly comprises a guide plate horizontally arranged on the top of the cover plate and arranged on the side of the circular spring locking tongue away from the pouring hole, a guide groove is horizontally arranged on the guide plate, a guide pin is arranged in the guide groove, a through hole is arranged on the guide pin and through which the steel wire rope passes, one end of the steel wire rope is connected to the circular spring locking tongue, and the other end of the steel wire rope is connected to the adjusting assembly after passing through the through hole on the guide pin.

[0019] The gear adjusting unit comprises a first adjusting gear arranged on the top of the cover plate and a second adjusting gear arranged on the side of the first adjusting gear close to the pouring hole and meshing with the first adjusting gear, the first adjusting gear is installed on the top of the cover plate through a mounting seat, a adjusting rod is vertically arranged in the center of the second adjusting gear, the steel wire rope is arranged on the adjusting rod, and an adjusting wrench for adjusting the first adjusting gear is arranged on the mounting seat.

[0020] The beneficial effect of the present application is that when the pile is formed by pouring concrete, the cover plate is opened, and the device only has the function of protecting the pile; after the hole is formed, the cover plate is closed, and the concrete pouring pipe is directly poured from the middle of the cover plate to complete the concrete pouring work, which can ensure the construction quality and avoid the collapse of the hole during the construction process; prevent the mud from falling into the pile hole during pouring, improve the pile quality; it can also improve the safety of construction, and avoid the workers from stepping into the pile hole during construction.

[0021] The technical solutions of the present application will be further described in detail below by means of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The construction state diagram of the cover plate of the present application is shown.

[0023] Figure 2 The connection relationship diagram of the cover plate and the pouring hole adjusting device of the present application is shown.

[0024] Figure 3 The enlarged view of A of Figure 2

[0025] Figure 4 The flow chart of the method of the present application is shown.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] DETAILED DESCRIPTION

[0028] As shown in Figures 1 to 4 A mud protection wall cast-in-place pile construction method based on a pouring auxiliary device, the method comprising the following steps:

[0029] Step one, expand the pile head: after the pile head construction is completed, the pile head is expanded outward along the circumferential direction of the pile head by using a drill hole expander, forming an annular expansion area 2; wherein the major diameter of the annular expansion area 2 is greater than the outer diameter of the pile casing 3, and the depth of the annular expansion area 2 and the depth of the pile casing 3 buried in the ground are equal;

[0030] Step two, hoist and install the pile casing: use a crane to hoist the pile casing 3 to the top of the annular expansion area 2, vertically lower the pile casing 3, and insert the pile casing 3 into the annular expansion area 2 until the connecting ring 5 on the periphery of the pile casing 3 and the ground 4 abut, and stop lowering;

[0031] ​Step three, install the cover plate: hinge the cover plate 8 on the top of the casing 3, and install the pouring hole adjusting device on the cover plate 8, the casing 3, the cover plate 8 and the pouring hole adjusting device form a pouring auxiliary device at the pile head; wherein the middle part of the cover plate 8 is provided with a pouring hole 9, the center of the pouring hole 9 coincides with the center of the casing 3;

[0032] Step four, construction of the cast-in-place pile hole: open the cover plate 8, the drilling machine drills vertically downward from the casing 3 until the drilling of the cast-in-place pile hole is completed, and the cover plate 8 is closed;

[0033] Step five, concrete pouring of the cast-in-place pile: adjust the pouring hole adjusting device to expose the pouring hole 9, lower the concrete pouring pipe from the pouring hole 9 to the bottom of the cast-in-place pile hole, lift the concrete pouring pipe while pouring the cast-in-place pile hole until the height of the concrete is flush with the ground 4, stop pouring the concrete and withdraw the concrete pouring pipe from the pouring hole 9.

[0034] When the drilling machine drills the cast-in-place pile hole, the cover plate 8 is opened, and the device only functions as a casing; after the hole drilling is completed, the cover plate 8 is closed, and the concrete pouring pipe is lowered from the middle of the cover plate 8 to complete the concrete pouring work. During the construction process, the construction quality can be ensured, and the hole collapse can be avoided; the mud falling into the cast-in-place pile hole during pouring is prevented, and the pile forming quality is improved; the construction safety is also improved, and the operator is prevented from stepping into the cast-in-place pile hole during the construction process.

[0035] It should be noted that in step one, the pile head construction is carried out in a traditional manner.

[0036] In this embodiment, in step one, the major diameter of the annular enlarged area 2 is 5 cm larger than the outer diameter of the casing 3.

[0037] In this embodiment, in step two, the thickness of the casing 3 is not less than 3 mm, the depth of the casing 3 inserted into the annular enlarged area 2 is not less than 500 mm, and the height of the casing 3 on the ground 4 is not greater than 500 mm.

[0038] As shown in the figure, Figure 1 In this embodiment, in step two, the connecting ring 5 is horizontally welded at the connection between the ground 4 and the casing 3, and a plurality of stiffening plates 6 are welded between the connecting ring 5 and the side wall of the casing 3; wherein the connecting ring 5 is arranged along the circumferential direction of the casing 3, and a plurality of the stiffening plates 6 are uniformly arranged along the circumferential direction of the casing 3.

[0039] In this embodiment, in step two, the thickness of the connecting ring 5 is not less than 3mm, and the width of the connecting ring 5 is 200mm~300mm; the stiffening plate 6 is a right-angled triangular plate, and the thickness of the stiffening plate 6 is 5mm~10mm; the stiffening plate 6 is provided with a lifting hole 22.

[0040] like Figure 1 As shown, in this embodiment, two rectangular holes 7 are symmetrically opened on the casing 3. The rectangular holes 7 are arranged on the section of the casing 3 located on the ground 4, and the rectangular holes 7 are arranged between the two stiffening plates 6.

[0041] In actual use, the rectangular hole 7 is made on the casing 3 to serve as a ventilation hole and also as an overflow hole. The rectangular hole 7 is 300mm long and 300mm wide.

[0042] In this embodiment, the sleeve 3 and the cover plate 8 are connected on one side by a hinge, and the other side of the cover plate 8 is provided with a buckle that connects to the sleeve 3.

[0043] In actual use, a high-strength hinge is welded to the top of the cover plate 8 on one side and a buckle is set at 180° with the hinge.

[0044] like Figure 2 As shown, in this embodiment, the pouring hole adjustment device includes two arc-shaped spring latches 10 symmetrically arranged on both sides of the pouring hole 9 and an adjustment component arranged on the top of the cover plate 8 and connected to the arc-shaped spring latches 10. The arc-shaped spring latches 10 and the adjustment component are connected by a steel wire rope 11. A guide component is provided on the side of the arc-shaped spring latches 10 away from the pouring hole 9. A tension spring 12 is connected between the two arc-shaped spring latches 10.

[0045] like Figure 2 As shown, in this embodiment, the guiding assembly includes a guide plate 14 horizontally disposed on the top of the cover plate 8 and arranged on the side of the arc-shaped spring latch 10 away from the pouring hole 9. A guide groove 15 is horizontally opened on the guide plate 14, and a guide pin 16 is disposed in the guide groove 15. A through hole is opened on the guide pin 16 for the steel wire rope 11 to pass through. One end of the steel wire rope 11 is connected to the arc-shaped spring latch 10, and the other end of the steel wire rope 11 passes through the guide groove 15 and the through hole on the guide pin 16 and is connected to the adjusting assembly.

[0046] In actual use, to facilitate the connection of the wire rope 11 with the arc-shaped spring locking tongue 10 and the adjusting assembly, through holes can be pre-drilled on the guide plate 14 for the wire rope 11 to pass through. For example... Figure 2As shown, the guide groove 15 is arranged along the length of the guide plate 14. The guide pin 16 can guide the arc-shaped spring latch 10 so that the arc-shaped spring latch 10 does not deviate during the opening and closing process.

[0047] like Figure 2 As shown, in this embodiment, the adjustment assembly includes a gear adjustment unit disposed on the top of the cover plate 8 and arranged on one side of the two arc-shaped spring latches 10, and guide posts 13 disposed on both sides of the gear adjustment unit. The section of the steel wire rope 11 extending to the outside of the guide plate 14 passes through the guide post 13 and is connected to the gear adjustment unit. The guide post 13 has a through hole for the steel wire rope 11 to pass through.

[0048] The gear adjustment unit includes a first adjustment gear 17 disposed on the top of the cover plate 8 and a second adjustment gear 18 disposed on the side of the first adjustment gear 17 near the pouring hole 9 and meshing with the first adjustment gear 17. The first adjustment gear 17 is mounted on the top of the cover plate 8 via a mounting base 19. An adjustment rod is vertically disposed at the center of the second adjustment gear 18, and a steel wire rope 11 is threaded through the adjustment rod. An adjustment wrench 21 for adjusting the first adjustment gear 17 is disposed on the mounting base 19.

[0049] In actual use, the adjusting rod has a through hole for the steel wire rope 11 to pass through. The upper part of the cover plate 8 is provided with two sets of arc-shaped spring locking tongues 10. The arc-shaped spring locking tongues 10 are naturally extended. The arc-shaped spring locking tongues 10 are connected to two sets of guide posts 13, the first adjusting gear 17 and the second adjusting gear 18 respectively through the steel wire rope 11. After the adjusting wrench 21 is turned, the arc-shaped spring locking tongues 10 can be pulled back by the steel wire rope 11. After the arc-shaped spring locking tongues 10 are retracted, the reserved opening will be fully exposed to meet the requirements of lowering the concrete pouring pipe. When the concrete pouring pipe is raised, there is no need to turn the adjusting wrench 21. The arc-shaped spring locking tongues 10 will automatically retract under pressure. After the enlarged part of the concrete pouring pipe passes through, it forms a self-locking mechanism to ensure construction safety.

[0050] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for constructing mud-wall cast-in-place piles based on a grouting auxiliary device, characterized in that, The method includes the following steps: Step 1: Enlarging the pile head: After the pile head construction is completed, the pile head is enlarged outward along the circumferential direction of the pile head using a drilling rig reamer to form an annular enlarged area (2); wherein, the large circle diameter of the annular enlarged area (2) is greater than the outer diameter of the casing (3), and the depth of the annular enlarged area (2) is equal to the depth of the casing (3) buried in the ground. Step 2: Hoisting and installing the casing: Use a crane to hoist the casing (3) to the top of the annular enlarged area (2), and lower the casing (3) vertically so that the casing (3) is inserted into the annular enlarged area (2) until the connecting ring (5) of the casing (3) and the ground (4) come into contact, and stop lowering; Step 3: Install the cover plate: Hinge the cover plate (8) on the top of the casing (3) and install the pouring hole adjustment device on the cover plate (8). The casing (3), the cover plate (8) and the pouring hole adjustment device form a grouting auxiliary device at the pile head. The cover plate (8) has a pouring hole (9) in the middle, and the center of the pouring hole (9) coincides with the center of the casing (3). Step 4: Construction of cast-in-place pile hole: Open the cover plate (8), and the drilling rig drills vertically downward from inside the casing (3) until the cast-in-place pile hole is completed, and then cover the cover plate (8). Step 5: Concrete pouring for cast-in-place piles: Adjust the pouring hole adjustment device to expose the pouring hole (9), lower the concrete pouring pipe from the pouring hole (9) to the bottom of the hole of the cast-in-place pile, and pour concrete into the hole of the cast-in-place pile while raising the concrete pouring pipe until the height of the concrete is level with the ground (4), stop pouring concrete and remove the concrete pouring pipe from the pouring hole (9); The pouring hole adjustment device includes two arc-shaped spring latches (10) symmetrically arranged on both sides of the pouring hole (9) and an adjustment component arranged on the top of the cover plate (8) and connected to the arc-shaped spring latches (10). The arc-shaped spring latches (10) and the adjustment component are connected by a steel wire rope (11). A guide component is provided on the side of the arc-shaped spring latches (10) away from the pouring hole (9). A tension spring (12) is connected between the two arc-shaped spring latches (10). The guide assembly includes a guide plate (14) horizontally disposed on the top of the cover plate (8) and arranged on the side of the arc-shaped spring latch (10) away from the pouring hole (9). A guide groove (15) is horizontally opened on the guide plate (14), and a guide pin (16) is provided in the guide groove (15). A through hole is opened on the guide pin (16) for the wire rope (11) to pass through. One end of the wire rope (11) is connected to the arc-shaped spring latch (10), and the other end of the wire rope (11) passes through the guide groove (15) and the through hole on the guide pin (16) and is connected to the adjustment assembly. The adjustment assembly includes a gear adjustment unit disposed on the top of the cover plate (8) and arranged on one side of the two arc-shaped spring latches (10), and guide posts (13) disposed on both sides of the gear adjustment unit. The section of the wire rope (11) extending to the outside of the guide plate (14) passes through the guide post (13) and is connected to the gear adjustment unit. The guide post (13) has a through hole for the wire rope (11) to pass through. The gear adjustment unit includes a first adjustment gear (17) disposed on the top of the cover plate (8) and a second adjustment gear (18) disposed on the side of the first adjustment gear (17) near the pouring hole (9) and meshing with the first adjustment gear (17). The first adjustment gear (17) is mounted on the top of the cover plate (8) via a mounting base (19). An adjustment rod is vertically disposed at the center of the second adjustment gear (18), and a steel wire rope (11) is threaded through the adjustment rod. An adjustment wrench (21) for adjusting the first adjustment gear (17) is disposed on the mounting base (19).

2. The method for constructing mud-wall cast-in-place piles based on a grouting auxiliary device according to claim 1, characterized in that: In step one, the diameter of the large circle of the annular enlarged area (2) is 5 cm larger than the outer diameter of the protective sleeve (3).

3. The method for constructing mud-wall cast-in-place piles based on a grouting auxiliary device according to claim 1, characterized in that: In step two, the thickness of the protective sleeve (3) is not less than 3mm, the depth of the protective sleeve (3) inserted into the annular enlarged area (2) is not less than 500mm, and the height of the protective sleeve (3) on the ground (4) is not greater than 500mm.

4. The method for constructing mud-wall cast-in-place piles based on a grouting auxiliary device according to claim 1, characterized in that: In step two, the connecting ring (5) is horizontally welded to the connection between the ground (4) and the protective cylinder (3), and multiple stiffening plates (6) are welded between the connecting ring (5) and the side wall of the protective cylinder (3); wherein, the connecting ring (5) is arranged along the circumferential direction of the protective cylinder (3), and the multiple stiffening plates (6) are evenly arranged along the circumferential direction of the protective cylinder (3).

5. The method for constructing mud-wall cast-in-place piles based on a grouting auxiliary device according to claim 4, characterized in that: In step two, the thickness of the connecting ring (5) is not less than 3mm, and the width of the connecting ring (5) is 200mm~300mm; the stiffening plate (6) is a right-angled triangular plate, and the thickness of the stiffening plate (6) is 5mm~10mm; the stiffening plate (6) is provided with a hoisting hole (22).

6. The method for constructing mud-wall cast-in-place piles based on a grouting auxiliary device according to claim 5, characterized in that: Two rectangular holes (7) are symmetrically opened on the casing (3). The rectangular holes (7) are arranged on the section of the casing (3) located on the ground (4) and are arranged between the two stiffening plates (6).

7. The method for constructing mud-wall cast-in-place piles based on a grouting auxiliary device according to claim 1, characterized in that: The sleeve (3) and the cover plate (8) are connected on one side by a hinge, and the other side of the cover plate (8) is provided with a buckle that connects to the sleeve (3).

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