Construction device and method of bored pile in thick silty sand bottom layer

Abstract

The application provides a thick and fine sand bottom layer bored pile construction device and method, which comprises a pile hole formed on a foundation of a construction area, a reinforcement cage in the pile hole, a plurality of positioning and clamping mechanisms arranged outside the pile hole, and a connecting mechanism arranged between two adjacent positioning and clamping mechanisms. The gear and rack linkage assembly is used to realize the alternate use of the stop plate and the reinforcement clamp, so that the stop plate is moved close to the pile hole during the placement of the reinforcement cage, the stop plate is close to the reinforcement cage or even contacts the reinforcement cage, the position of the reinforcement cage during the placement is limited, and the deviation of the reinforcement cage during the placement is prevented. After the placement of the reinforcement cage is completed, the moving plate is moved close to the reinforcement cage, the reinforcement cage is clamped and fixed by the reinforcement clamp, the positioning and fixing of the reinforcement cage are realized, the reinforcement cage is prevented from moving and tilting due to the impact during the pouring of the concrete, and the construction quality is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bored pile construction, in particular to a thick powder fine sand bottom layer bored pile construction device and method. BACKGROUND

[0002] A bored pile refers to a pile formed by means of mechanical drilling, steel pipe soil compaction or manual excavation in the ground, and a steel reinforcement cage is placed in the pile hole and poured with concrete. According to the different hole forming methods, the bored pile can be divided into several types such as the pipe pile, the bored pile and the hole pile. The stratum of the foundation pit has a thick powder fine sand stratum. Due to the characteristics of loose soil and poor cohesion of the thick powder fine sand stratum, the pile hole forming is not good, which causes the steel reinforcement cage to move in the pile hole, and the pile is inclined when the concrete is poured. In addition, during the placement of the steel reinforcement cage, the steel reinforcement cage is offset due to the long length of the steel reinforcement cage.

[0003] According to the search, the Chinese patent publication No. CN213682077U discloses a bored pile, which limits the position of the steel reinforcement cage by adding multiple connecting short reinforcement bars to the inner wall of the steel reinforcement cage. However, the method of adding multiple connecting short reinforcement bars is too complicated, time-consuming and costly, which affects the progress of construction and causes the steel reinforcement cage to move, offset and be inclined, resulting in imperfect treatment. Therefore, a thick powder fine sand stratum bored pile construction device is needed to improve the above problems. SUMMARY

[0004] The main purpose of the present application is to provide a thick powder fine sand bottom layer bored pile construction device and method to solve the problems in the background art.

[0005] To solve the above technical problems, the technical solution adopted by the present application is: a pile hole formed on the foundation of a construction area, a steel reinforcement cage in the pile hole, a plurality of positioning and clamping mechanisms provided outside the pile hole, and two adjacent positioning and clamping mechanisms connected by a connecting mechanism.

[0006] The base in the positioning and clamping mechanism is fixed on the foundation, the top of the base is provided with a sliding sliding plate, the end of the sliding plate is fixedly provided with a steel reinforcement clamp, the steel reinforcement clamp is used to fix the main reinforcement of the steel reinforcement cage, the end of the base is provided with a sliding abutment plate, the abutment plate abuts against the outside of the steel reinforcement cage, and the abutment plate is used for positioning the placement of the steel reinforcement cage, and the sliding plate and the abutment plate slide alternately.

[0007] Preferably, the base is fixedly provided with an ear plate on both sides, the ear plate is provided with an anchor rod on both sides, and the ear plate is fixed on the foundation through the anchor rod.

[0008] Preferably, a sliding assembly is arranged between the sliding plate and the base, a fixed plate is fixedly arranged on the base, a threaded rod is arranged on the fixed plate and is threadedly connected, one end of the threaded rod is rotatably arranged on the sliding plate, and the other end of the threaded rod is fixedly arranged with a handle.

[0009] Preferably, a first rack is arranged between the abutting plate and the base, one end of the first rack is fixedly arranged on the abutting plate, and the other end of the first rack is slidably arranged in the base.

[0010] The first rack is provided with guide columns on both sides, one end of the guide column is fixedly arranged on the abutting plate, and the other end of the guide column is slidably arranged in the base.

[0011] Preferably, a rotating gear is arranged in the base, a second rack is fixedly arranged on the bottom of the sliding plate, and the gear is meshed with the second rack and the first rack on both sides.

[0012] Preferably, connecting seats are fixedly arranged on both sides of the top of the base, and the end of the connecting mechanism is hingedly connected to the connecting seat.

[0013] Preferably, the first connecting rod and the second connecting rod in the connecting mechanism slide relative to each other, the end of the first connecting rod is slidably arranged in the second connecting rod, a locking bolt is arranged between the first connecting rod and the second connecting rod, the locking bolt is used for fixing the first connecting rod and the second connecting rod, lock columns are fixedly arranged on the ends of the first connecting rod and the second connecting rod, and the lock columns are rotatably arranged in the connecting seat.

[0014] Preferably, a sliding groove is arranged on the second connecting rod, and the locking bolt is slidably arranged in the sliding groove.

[0015] The construction method of the thick fine sand bottom layer bored filling pile is as follows:

[0016] S1, drilling a pile hole in a construction area, installing a plurality of positioning and clamping mechanisms at the edge of the pile hole, and installing a connecting mechanism between two adjacent positioning and clamping mechanisms;

[0017] S2, rotating the threaded rod by driving the handle, moving the sliding plate, and driving the abutting plate to move forward through the transmission of the first rack and the gear and the second rack, and synchronously adjusting the abutting plates of the plurality of positioning and clamping mechanisms to the positioning surface of the lower steel reinforcement cage;

[0018] S3, constructing and lowering the steel reinforcement cage, and accurately lowering the steel reinforcement cage by abutting against the abutting plate;

[0019] S4, after the steel reinforcement cage is lowered into position, reversely rotating the threaded rod by driving the handle, retracting the abutting plate, extending the steel reinforcement clamp by the sliding plate, and clamping and fixing the main reinforcement of the steel reinforcement cage by the steel reinforcement clamp;

[0020] S5, pouring concrete into the pile hole by a grouting device.

[0021] Preferably, the pile construction includes two processes of lowering the steel reinforcement cage and pouring.

[0022] When the steel cage is lowered, the screw is driven to rotate forward by the handle, which drives the stop plate to extend and position the steel cage during lowering.

[0023] During pouring, the screw is reversed by driving the handle, which in turn drives the sliding plate and the rebar clamp to extend, and the rebar clamp clamps the main bars of the rebar cage to be clamped and fixed.

[0024] This invention provides a construction device and method for bored piles with thick silty fine sand sub-base. A gear and rack linkage assembly enables the alternating use of a support plate and rebar clamps. During the lowering of the rebar cage, the support plate is moved closer to the pile hole, and even into contact with the rebar cage, thus limiting the position of the cage during lowering and preventing displacement. After lowering, a moving plate is moved closer to the cage, and the rebar clamps hold and fix the cage, achieving limited positioning and preventing displacement or tilting due to impact during concrete pouring, thereby ensuring construction quality. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a structural view of the positioning and clamping mechanism of the present invention;

[0028] Figure 3 This is a front sectional view of the positioning and clamping mechanism of the present invention;

[0029] Figure 4 This is a structural view of the connection mechanism of the present invention;

[0030] In the diagram: Construction area 1; Pile hole 2; Rebar cage 3; Positioning and clamping mechanism 4; Base 401; Ear plate 402; Anchor bolt 403; Connecting seat 404; Sliding plate 405; Rebar clamp 406; Fixing plate 407; Screw rod 408; Handle 409; Support plate 410; Slide rail 411; First rack 412; Guide column 413; Gear 414; Second rack 415; Connecting mechanism 5; First connecting rod 501; Second connecting rod 502; Locking bolt 503; Slide groove 504; Locking column 505. Detailed Implementation

[0031] Example 1

[0032] like Figures 1-4As shown, the construction device and method for bored piles in thick silty sand sub-base includes a pile hole 2 formed on the foundation of the construction area 1, a steel cage 3 inside the pile hole 2, and multiple positioning and clamping mechanisms 4 provided on the outside of the pile hole 2. Two adjacent positioning and clamping mechanisms 4 are connected by a connecting mechanism 5.

[0033] The base 401 of the positioning and clamping mechanism 4 is fixed to the foundation. A sliding plate 405 is provided on the top of the base 401, and a steel bar clamp 406 is fixed to the end of the sliding plate 405. The steel bar clamp 406 is used to fix the main reinforcement of the steel cage 3. A sliding abutment plate 410 is provided at the end of the base 401, which abuts against the outside of the steel cage 3 for positioning the steel cage 3 during lowering. The sliding plate 405 and the abutment plate 410 slide alternately. Therefore, in this example, there are four positioning and clamping mechanisms 4, evenly distributed at the edge of the pile hole 2. The positioning and clamping mechanisms 4 are also connected and reinforced by a connecting mechanism 5.

[0034] Preferably, ear plates 402 are fixed on both sides of the base 401, and anchor rods 403 are provided on both sides of the ear plates 402. The ear plates 402 are fixed to the foundation by the anchor rods 403. With this structure, the positioning and clamping mechanism 4 is fixed to the edge of the pile hole 2 by the anchor rods 403, and the installation and operation are simple and convenient.

[0035] Preferably, a sliding assembly is provided between the sliding plate 405 and the base 401. A fixing plate 407 is fixedly mounted on the base 401, and a threaded screw 408 is provided on the fixing plate 407. One end of the screw 408 abuts against the sliding plate 405 and rotates, while the other end is fixedly mounted with a handle 409. With this structure, the sliding assembly includes a slider and a slide rail. The slider is fixed to the bottom of the sliding plate 405, the slide rail is fixed to the base 401, and the end of the screw 408 abuts against the sliding plate 405 and rotates via a bearing. When the screw 408 rotates, it can push and drive the sliding plate 405 to reciprocate.

[0036] Preferably, a first rack 412 is provided between the abutment plate 410 and the base 401. One end of the first rack 412 is fixed on the abutment plate 410, and the other end slides against the base 401.

[0037] The first rack 412 has guide posts 413 on both sides. One end of the guide post 413 is fixed to the abutment plate 410, and the other end slides against the base 401. With this structure, the first rack 412 can drive the abutment plate 410 to slide, which is simple and convenient to operate, and the guide post 413 can ensure smooth sliding.

[0038] Preferably, the base 401 has a rotating gear 414, and the bottom of the sliding plate 405 is fixed with a second rack 415. The gear 414 meshes with the second rack 415 and the first rack 412 on both sides. With this structure, the second rack 415 and the first rack 412 are linked with the gear 414. By driving the sliding plate 405 to move, the abutment 410 can be moved through linkage, so that the abutment 410 and the rebar clamp 406 can be used alternately.

[0039] Preferably, connecting seats 404 are fixed on both sides of the top of the base 401, and the ends of the connecting mechanism 5 are hinged to the connecting seats 404. With this structure, the connecting mechanism 5 can connect and fix multiple positioning and clamping mechanisms 4 together, so as to make the whole more reliable.

[0040] Preferably, in the connecting mechanism 5, the first connecting rod 501 and the second connecting rod 502 slide relative to each other, with the end of the first connecting rod 501 sliding against the second connecting rod 502. A locking bolt 503 is provided between the first connecting rod 501 and the second connecting rod 502 to fix them. A locking pin 505 is fixed at the end of the first connecting rod 501 and the second connecting rod 502, and the locking pin 505 rotates against the connecting seat 404. With this structure, the distance between the first connecting rod 501 and the second connecting rod 502 can be adjusted by relative sliding to adapt to the desired interval. After adjustment, the distance can be locked and fixed by the locking bolt 503.

[0041] Preferably, the second connecting rod 502 is provided with a sliding groove 504, and the locking bolt 503 slides against the sliding groove 504. With this structure, after the sliding adjustment is completed, it is locked and fixed by the locking bolt 503.

[0042] Example 2

[0043] like Figures 1-4 As shown in Example 1, the construction method for bored piles with a thick silty fine sand sub-base is further explained. The method consists of the following steps:

[0044] S1. Drill pile holes 2 in construction area 1, install multiple positioning and clamping mechanisms 4 at the edge of pile holes 2, and then install connecting mechanisms 5 between two adjacent positioning and clamping mechanisms 4.

[0045] S2. Drive the screw 408 to rotate by the handle 409, which drives the sliding plate 405 to move. Through the transmission of the first rack 412 and the gear 414 with the second rack 415, the abutment 410 moves forward. The abutments 410 of the multiple positioning clamping mechanisms 4 are synchronously adjusted to the positioning surface where the steel cage 3 is lowered.

[0046] S3. Construction begins with lowering the steel cage 3, which is precisely lowered against the support plate 410.

[0047] S4. After the steel cage 3 is lowered into place, the screw 408 is reversed by the handle 409, so that the abutment plate 410 retracts and the sliding plate 405 drives the steel clamp 406 to extend, and the main reinforcement of the steel cage 3 is clamped and fixed by the steel clamp 406.

[0048] S5. Concrete is poured into pile hole 2 using grouting equipment.

[0049] Preferably, the construction of cast-in-place piles includes two processes: lowering the reinforcing cage 3 and pouring the concrete.

[0050] When the rebar cage 3 is lowered, the screw rod 408 is driven to rotate forward by the handle 409, thereby driving the stop plate 410 to extend. The stop plate 410 positions the rebar cage 3 during lowering, thereby limiting the position of the rebar cage 3 during lowering and preventing the rebar cage 3 from deviating during the lowering process.

[0051] During pouring, the handle 409 drives the lead screw 408 to reverse, thereby driving the sliding plate 405 and the rebar clamp 406 to extend. The rebar clamp 406 clamps and fixes the main bars of the rebar cage 3. This achieves the limiting and fixing of the rebar cage 3, preventing it from moving or tilting due to impact during concrete pouring, and ensuring construction quality.

[0052] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A construction device for bored pile in thick silty sand bottom layer, comprising a pile hole (2) formed on the ground of a construction area (1), and a reinforcement cage (3) in the pile hole (2), characterized in that: The pile hole (2) is provided with a plurality of positioning and clamping mechanisms (4) outside, and adjacent two positioning and clamping mechanisms (4) are connected through a connecting mechanism (5); ​ The base (401) in the positioning and clamping mechanism (4) is fixed on the foundation, the top of the base (401) is provided with a sliding sliding plate (405), the end of the sliding plate (405) is fixedly provided with a steel bar clamp (406), the steel bar clamp (406) is used for fixing on the main reinforcement of the steel reinforcement cage (3), the end of the base (401) is provided with a sliding abutting plate (410), the abutting plate (410) abuts against the outside of the steel reinforcement cage (3), and is used for positioning the lowering of the steel reinforcement cage (3), and the sliding plate (405) and the abutting plate (410) slide alternately; The sliding assembly is arranged between the sliding plate (405) and the base (401), the fixed plate (407) is fixedly arranged on the base (401), the threaded connection screw rod (408) is arranged on the fixed plate (407), one end of the screw rod (408) abuts against the sliding plate (405) and rotates, and the other end is fixedly provided with a handle (409); The first rack (412) is arranged between the abutting plate (410) and the base (401), one end of the first rack (412) is fixed on the abutting plate (410), and the other end abuts against the inside of the base (401) and slides; The first rack (412) is arranged between the abutting plate (410) and the base (401), one end of the first rack (412) is fixed on the abutting plate (410), and the other end abuts against the inside of the base (401) and slides; The base (401) is provided with a rotating gear (414) inside, the second rack (415) is fixedly arranged on the bottom of the sliding plate (405), and the gear (414) is meshed with the second rack (415) and the first rack (412) on both sides.

2. The construction device for the bored filling pile of the thick and fine sand bottom layer according to claim 1, characterized in that: The base (401) is provided with a rotating gear (414) inside, the second rack (415) is fixedly arranged on the bottom of the sliding plate (405), and the gear (414) is meshed with the second rack (415) and the first rack (412) on both sides.

3. The construction device for the bored filling pile of the thick and fine sand bottom layer according to claim 1, characterized in that: The base (401) is provided with an ear plate (402) on both sides, the ear plate (402) is provided with an anchor rod (403) on both sides, and the ear plate (402) is fixed on the foundation through the anchor rod (403).

4. The construction device for the bored filling pile of the thick and fine sand bottom layer according to claim 3, characterized in that: The connecting seat (404) is fixedly arranged on both sides of the top of the base (401), and the end of the connecting mechanism (5) is hinged to the connecting seat (404).

5. The construction device for the bored filling pile of the thick and fine sand bottom layer according to claim 4, characterized in that: The first connecting rod (501) and the second connecting rod (502) in the connecting mechanism (5) slide relative to each other, the end of the first connecting rod (501) abuts against the inside of the second connecting rod (502) and slides, the locking bolt (503) is arranged between the first connecting rod (501) and the second connecting rod (502), the locking bolt (503) is used for fixing the first connecting rod (501) and the second connecting rod (502), the lock column (505) is fixedly arranged on the end of the first connecting rod (501) and the second connecting rod (502), and the lock column (505) abuts against the inside of the connecting seat (404) and rotates.

6. The construction method of the cast-in-situ pile in the thick silty sand bottom layer, characterized in that: The second connecting rod (502) is provided with a sliding groove (504), and the locking bolt (503) abuts against the inside of the sliding groove (504) and slides. The thick fine sand bottom layer bored pile construction device of claim 1 is adopted, including the following steps: S1, drilling pile hole (2) in the construction area (1), installing a plurality of positioning and clamping mechanisms (4) at the edge of the pile hole (2), and then installing a connecting mechanism (5) between adjacent two positioning and clamping mechanisms (4); S2, drive the screw rod (408) to rotate through the handle (409), drive the sliding plate (405) to move, drive the abutting plate (410) to move forward through the transmission of the first rack (412) and the gear (414) and the second rack (415), and the abutting plates (410) of the plurality of positioning and clamping mechanisms (4) are synchronously adjusted to the positioning surface of the reinforcing cage (3) in lowering; S3, lower the reinforcing cage (3) in construction, and the reinforcing cage (3) is accurately lowered by abutting against the abutting plate (410); S4, after the reinforcing cage (3) is lowered in place, reverse the screw rod (408) to drive the abutting plate (410) to retract through the handle (409), drive the reinforcing clamp (406) to extend through the sliding plate (405), and clamp and fix the main reinforcement of the reinforcing cage (3) through the reinforcing clamp (406); S5, pour concrete into the pile hole (2) through the grouting equipment.

7. The construction method of the thick fine sand bottom layer bored pile according to claim 6, wherein the method is: the pile construction includes two processes of lowering the reinforcing cage (3) and pouring; When the reinforcing cage (3) is lowered, the abutting plate (410) is driven to extend through the positive rotation of the handle (409) to drive the screw rod (408), and the lowering of the reinforcing cage (3) is positioned through the abutting plate (410); When pouring, the sliding plate (405) and the reinforcing clamp (406) are driven to extend through the reverse rotation of the handle (409) to drive the screw rod (408), and the main reinforcement of the reinforcing cage (3) is clamped and fixed through the reinforcing clamp (406).

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