Soft soil foundation cast-in-situ bored pile positioning device

Abstract

The utility model provides a soft soil foundation cast-in-situ bored pile positioning device, which comprises a plurality of groups of supporting mechanisms, and a plurality of supporting pieces distributed along the vertical direction are arranged on each group of supporting mechanisms; the axis of the barrel is vertical, and the bottom of the barrel is connected with the top of the supporting mechanism; the multiple stabilizing plates are located on the inner side of the cylinder body, and the stabilizing plates are connected with the cylinder body through an adjusting mechanism; the bearing mechanism is detachably connected with the supporting piece; the hook mechanisms are detachably connected with the bearing mechanism, the number of the hook mechanisms is two, the two hook mechanisms are distributed in the directions of two concentric circles, and a space for containing a steel casing is formed between the two hook mechanisms. The method has good adaptability, and the stability of the steel casing in the descending and concrete pouring process can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning of cast-in-place piles in soft soil foundations, and particularly relates to a positioning device for bored cast-in-place piles in soft soil foundations. Background Art

[0002] In port and waterway engineering, bored cast-in-place piles are a very common and highly applicable type of construction pile foundation. First, a hole is drilled, then a steel casing is lowered and concrete is poured. It has the advantages of good stability, low noise, and no soil squeezing effect.

[0003] For existing bored cast-in-place piles in offshore, inland river projects and soft soil foundations, steel cages are generally used to support the embedding of steel casings. However, this method will damage the steel cages themselves. Moreover, during the process of lowering the steel cages, a hoisting device is generally used to lift the steel cages and then lower them into the holes. In this process, the stability of the steel casing during lifting and the accuracy during lowering are not very effective. When the steel casing is lowered to the designated position and concrete is poured, the stability of the steel casing is poor, and the measures for protecting the hole wall and positioning the soft soil foundation are not very perfect. Summary of the Utility Model

[0004] Aiming at the deficiencies in the prior art, the utility model provides a positioning device for bored cast-in-place piles in soft soil foundations, which can improve the stability of the steel casing and reduce the deviation situation, etc.

[0005] According to an embodiment of the utility model, a positioning device for bored cast-in-place piles in soft soil foundations is provided, including:

[0006] A support mechanism, multiple groups of the support mechanism are provided, and a plurality of support members distributed vertically are provided on each group of the support mechanism;

[0007] A cylinder, the axis of the cylinder is vertical and the bottom thereof is connected to the top of the support mechanism;

[0008] A plurality of stabilizing plates, the stabilizing plates are located inside the cylinder, and the stabilizing plates are connected to the cylinder through an adjusting mechanism;

[0009] A bearing mechanism, the bearing mechanism is detachably connected to the support member;

[0010] A hook mechanism, the hook mechanism is detachably connected to the bearing mechanism, two groups of the hook mechanism are distributed along two concentric circle directions, and a space for accommodating the steel casing is formed between the two groups of the hook mechanism.

[0011] Preferably, the bearing mechanism includes an outer ring and an inner ring coaxially arranged with the cylinder, the outer ring and the inner ring are fixedly connected by a plurality of connecting rods, and a space allowing the hook mechanism to pass through is provided between the outer ring and the inner ring.

[0012] Further preferably, the support mechanism includes a vertically arranged support rod, a stabilizing rod fixedly connected to the support rod and inclined, the support member includes a support portion fixedly connected to the support rod, and a limiting portion fixed at the end of the support portion, and the support portion is arranged in a direction parallel to the cylinder.

[0013] Further preferably, a limiting groove which is interference fit with the supporting portion is provided at the bottom of the outer ring.

[0014] Further preferably, the hook mechanism includes a tension-bearing part of a straight rod structure and hook bodies fixed at both ends of the tension-bearing part, the hook bodies at both ends of the tension-bearing part located on the outer circumference are oriented in opposite directions, and the hook bodies at both ends of the tension-bearing part located on the inner circumference are oriented in the same direction.

[0015] Further preferably, the outer side of the cylinder is provided with an annular groove body coaxial with the cylinder, the groove body is provided with an external thread, the bottom of the groove body is provided with a plurality of penetrating strip-shaped movable holes, the movable holes are vertically arranged and correspond one to one with each of the stabilizing plates, the adjustment mechanism includes a threaded sleeve arranged in the groove body and threadedly connected thereto, a transmission sleeve coaxially rotatably connected to the threaded sleeve, a transmission block fixedly connected to the transmission sleeve and passing through the movable hole, the transmission block is rotatably connected to a transmission rod, the transmission rod is rotatably connected to the stabilizing plate, and the stabilizing plate and the cylinder are also connected by a group of guide members.

[0016] Further preferably, each group of the guide members is provided with a plurality of guide members, and the guide members include a guide seat which is arranged parallel to the radial direction of the cylinder and fixedly connected to the inner wall of the cylinder, and a guide rod which is movably matched with the guide seat and fixedly connected to the stabilizing plate.

[0017] Still further preferably, two vertical adjustment plates are provided on the inner side of the stabilizing plate, and the ends of the two adjustment plates that are close to each other are rotatably connected to a rotating shaft vertically fixed in the middle of the stabilizing plate, screw holes are provided on both sides of the stabilizing plate and are threaded with adjustment bolts, and the ends of the adjustment bolts are coaxially rotatably connected to a connecting seat, and the connecting seat is movably connected to the adjustment plate through a movable rod.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] A cylinder is arranged on the supporting mechanism, and a plurality of stabilizing plates are arranged in the cylinder. The stabilizing plates are connected to the cylinder through an adjusting assembly. When the steel casing is below, the position of the stabilizing plates can be adjusted so that the stabilizing plates can be close to the steel casing to produce a limiting effect on it, thereby preventing the steel casing from shaking greatly during the process below and improving its stability.

[0020] A bearing mechanism is also connected to the support mechanism, and two groups of hook mechanisms are connected to the bearing mechanism. Each group of hook mechanisms has a plurality of members, which provide tensile forces for the steel casing from the inner and outer sides of the steel casing respectively. During the process of pouring concrete, the stability of the steel casing can be effectively improved, and the height of the bearing mechanism is adjustable, which can adapt to the lowering and positioning work of steel casings with different hole depths. Brief Description of the Drawings

[0021] Figure 1 Structural schematic diagram of a positioning device for bored cast-in-place piles in soft soil foundation of the present utility model;

[0022] Figure 2 For the present utility model Figure 1 Enlarged structural schematic diagram of partial A in the middle;

[0023] Figure 3 Front view structural schematic diagram of the cooperation between the stabilizing plate and the cylinder body in a positioning device for bored cast-in-place piles in soft soil foundation of the present utility model;

[0024] Figure 4 Top view structural schematic diagram of the stabilizing plate in another embodiment of a positioning device for bored cast-in-place piles in soft soil foundation of the present utility model;

[0025] Figure 5 Structural schematic diagram of the outer hook mechanism in a positioning device for bored cast-in-place piles in soft soil foundation of the present utility model;

[0026] Figure 6 Structural schematic diagram of the inner hook mechanism in a positioning device for bored cast-in-place piles in soft soil foundation of the present utility model;

[0027] Figure 7 Structural schematic diagram of the cooperation between the hook mechanism and the bearing mechanism in a positioning device for bored cast-in-place piles in soft soil foundation of the present utility model;

[0028] In the above-mentioned drawings: 1. Support mechanism; 101. Support rod; 102. Stabilizing rod; 110. Support member; 111. Support part; 112. Limiting part; 2. Cylinder body; 201. Groove; 202. Moving hole; 3. Stabilizing plate; 301. Adjusting plate; 302. Rotating shaft; 303. Threaded hole; 304. Adjusting bolt; 305. Connecting seat; 306. Moving rod; 4. Adjusting mechanism; 401. Threaded sleeve; 402. Driving sleeve; 403. Driving block; 404. Driving rod; 410. Guide member; 411. Guide seat; 412. Guide rod; 5. Bearing mechanism; 501. Link; 510. Outer ring; 511. Limiting groove; 520. Inner ring; 6. Hook mechanism; 601. Tensile bearing part; 602. Hook body. Detailed Embodiment

[0029] The technical solutions in the present utility model will be further described below in conjunction with the drawings and embodiments.

[0030] Example 1:

[0031] Please refer to Figure 1 , the present utility model provides the following technical solutions: A positioning device for bored cast-in-place piles in soft soil foundations, comprising:

[0032] A support mechanism 1, there are multiple groups of the support mechanism 1, and a plurality of support members 110 distributed vertically are provided on each group of the support mechanism 1;

[0033] A cylinder 2, the axis of the cylinder 2 is vertical and the bottom thereof is connected to the top of the support mechanism 1, and multiple groups of support mechanisms 1 are evenly distributed along the circumferential direction of the cylinder 2;

[0034] A stabilizing plate 3, there are multiple stabilizing plates 3 and they are located inside the cylinder 2, the stabilizing plate 3 is connected to the cylinder 2 through an adjusting mechanism 4, and multiple stabilizing plates 3 are evenly distributed along the circumferential direction of the cylinder 2. By the adjusting mechanism 4, the stabilizing plate 3 can be driven to move linearly along the radial direction of the cylinder 2, and adjusting the positions of multiple stabilizing plates 3 can adapt to the stable operation of steel casing with different diameters;

[0035] A bearing mechanism 5, the bearing mechanism 5 is detachably connected to the support member 110, and the bearing mechanism 5 can cooperate with support members 110 at different heights to change the height of the bearing mechanism 5;

[0036] A hook mechanism 6, the hook mechanism 6 is detachably connected to the bearing mechanism 5, there are two groups of the hook mechanism 6, and the two groups of the hook mechanism 6 are distributed along two concentric circle directions, and a space for accommodating the steel casing is formed between the two groups of the hook mechanism 6;

[0037] After the steel casing is lowered to the designated depth, the two groups of hook mechanisms 6 can provide a lifting effect for it from the inside and outside of the steel casing, and under the tensile effect of the hook mechanisms 6 on the inside and outside, the stability of the steel casing can be effectively improved;

[0038] Specifically, as Figure 2 shown, the bearing mechanism 5 includes an outer ring 510 and an inner ring 520 coaxially arranged with the cylinder 2, the outer ring 510 and the inner ring 520 are fixedly connected by a plurality of connecting rods 501, and a space allowing the hook mechanism 6 to pass through is provided between the outer ring 510 and the inner ring 520;

[0039] In order to facilitate improving the stability of the hook mechanism 6, in a further embodiment, positioning grooves can be provided at the tops of the outer ring 510 and the inner ring 520, and the top of the hook mechanism 6 is matched with the positioning grooves. Under the gravity of the steel casing, the stability of the hook mechanism 6 can be effectively improved;

[0040] In order to improve the stability of the support mechanism 1, in a further embodiment, the support mechanism 1 includes a vertically arranged support rod 101 and a stable rod 102 fixedly connected to the support rod 101 and arranged obliquely. Both the support rod 101 and the stable rod 102 can be inserted into the ground. The support member 110 includes a support portion 111 fixedly connected to the support rod 101 and a limiting portion 112 fixed at the end of the support portion 111. The support portion 111 is arranged in a direction parallel to the cylinder body 2;

[0041] A limiting groove 511 that is in interference fit with the support portion 111 is provided at the bottom of the outer ring 510. When the hook mechanism 6 bears the steel casing, the gravity of the steel casing is transmitted to the outer ring 510 through the hook mechanism 6, so that the limiting groove 511 on the outer ring 510 fits tightly with the support portion 111, ensuring the stability of the bearing mechanism 5;

[0042] In order to facilitate lifting from both the inside and outside of the steel casing, in a further embodiment, as Figure 5 、 Figure 6 shown, the hook mechanism 6 includes a straight rod-shaped bearing portion 601 and hook bodies 602 fixed at both ends of the bearing portion 601. The hook bodies 602 at both ends of the bearing portion 601 located on the outer circumferential side face in opposite directions, and the hook bodies 602 at both ends of the bearing portion 601 located on the inner circumferential side face in the same direction;

[0043] As Figure 7 shown, the hook body 602 at the top of the outer hook mechanism 6 faces outward and cooperates with the outer ring 510, and the hook body 602 at the bottom faces inward and cooperates with the bottom of the steel casing from the outside to the inside; the hook body 602 at the top of the inner hook mechanism 6 faces outward and cooperates with the inner ring 520, and the hook body 602 at the bottom faces outward and cooperates with the bottom of the steel casing from the inside to the outside;

[0044] Embodiment Two:

[0045] In order to facilitate the simultaneous adjustment of multiple stabilizing plates 3, on the basis of Embodiment One, as Figure 3As shown in the figure, an annular groove body 201 coaxial with the outer side of the cylinder body 2 is provided. External threads are provided in the groove body 201. A plurality of through strip-shaped moving holes 202 are provided at the bottom of the groove body 201. The moving holes 202 are vertically arranged and correspond to each stabilizing plate 3 one by one. The adjusting mechanism 4 includes a threaded sleeve 401 arranged in the groove body 201 and threadedly connected thereto, a transmission sleeve 402 rotatably connected coaxially with the threaded sleeve 401, and a transmission block 403 fixedly connected to the transmission sleeve 402 and passing through the moving hole 202. The transmission block 403 is rotatably connected with a transmission rod 404, and the transmission rod 404 is rotatably connected with the stabilizing plate 3. A group of guiding members 410 are also connected between the stabilizing plate 3 and the cylinder body 2. The guiding members 410 are arranged along the radial direction of the cylinder body 2, so that the stabilizing plate 3 can only move linearly along the radial direction of the cylinder body 2;

[0046] With the cooperation of the transmission block 403 and the moving hole 202, the transmission sleeve 402 can only move vertically. Since the transmission sleeve 402 is rotatably connected with the threaded sleeve 401, rotating the threaded sleeve 401 can drive the transmission sleeve 402 to move along the axial direction of the cylinder body 2, and can synchronously drive a plurality of stabilizing plates 3 to move along the radial direction of the cylinder body 2 through the transmission rod 404, so as to adapt to steel casing pipes with different diameters. And after the adjustment is completed, even if the stabilizing plate 3 is subjected to a force, it cannot drive the transmission sleeve 402 to move through the transmission rod 404. Therefore, the stability of the stabilizing plate 3 can be ensured;

[0047] Specifically, a plurality of guiding members 410 are provided in each group. The guiding members 410 include a guiding seat 411 arranged parallel to the radial direction of the cylinder body 2 and fixedly connected to the inner wall of the cylinder body 2, and a guiding rod 412 movably matched with the guiding seat 411 and fixedly connected to the stabilizing plate 3;

[0048] In order to more finely limit the horizontal shaking of the steel casing pipe, in a further embodiment, as Figure 4 shown, two vertical adjusting plates 301 are provided on the inner side of the stabilizing plate 3. One ends of the two adjusting plates 301 close to each other are rotatably connected to a rotating shaft 302 vertically fixed in the middle of the stabilizing plate 3. Screw holes 303 are provided on both sides of the stabilizing plate 3 and threadedly connected with adjusting bolts 304. The end of the adjusting bolt 304 is rotatably connected with a connecting seat 305 coaxially, and the connecting seat 305 is movably connected with the adjusting plate 301 through a movable rod 306;

[0049] By rotating the adjusting bolt 304, the adjusting plate 301 can be driven to rotate within a certain range. After adjusting the position of the stabilizing plate 3, the adjusting plate 301 can be made to fully close to the outer wall of the steel casing pipe in a fine-tuning manner, which can effectively improve its stability during the lowering process of the steel casing pipe.

[0050] Embodiment Three:

[0051] The present utility model also provides a method for positioning a steel casing, comprising the following steps:

[0052] When the steel casing is lowered by a hoisting device, after the steel casing enters the inner side of the cylinder body 2, first adjust the position of the stabilizing plate 3 so that the stabilizing plate 3 is close to the outer wall of the steel casing, and then adjust the position of the adjusting plate 301 so that the adjusting plate 301 is fully close to the side wall of the steel casing to prevent the steel casing from shaking;

[0053] When the steel casing is lowered to the designated depth, assemble the bearing mechanism 5 and the support member 110, and use the hook mechanism 6 to position both the inside and outside of the steel casing to keep its position fixed, and then disconnect the steel casing from the hoisting device;

[0054] When pouring concrete until it reaches the bottom of the steel casing, first retract the hook mechanism 6 on the outside. After the pouring is completed, slowly lift the steel casing and the hook mechanism 6 on the inside.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A soft soil foundation bored pile positioning device, characterized in that: include: A support mechanism (1), wherein the support mechanism (1) is provided with a plurality of groups, and each group of the support mechanism (1) is provided with a plurality of support members (110) distributed in a vertical direction; A cylinder (2), the axis of which is vertical and the bottom of which is connected to the top of the support mechanism (1); A stabilizing plate (3), wherein a plurality of stabilizing plates (3) are provided and are located inside the cylinder (2), and the stabilizing plate (3) is connected to the cylinder (2) via an adjusting mechanism (4); A carrying mechanism (5), the carrying mechanism (5) being detachably connected to the support member (110); A hook mechanism (6), wherein the hook mechanism (6) is detachably connected to the bearing mechanism (5), and the hook mechanism (6) is provided with two groups, the two groups of the hook mechanisms (6) are distributed along two concentric circles, and a space for accommodating the steel casing is formed between the two groups of the hook mechanisms (6).

2. A soft soil foundation bored pile positioning device according to claim 1, characterized in that: The bearing mechanism (5) comprises an outer ring (510) and an inner ring (520) which are coaxially arranged with the cylinder (2); the outer ring (510) and the inner ring (520) are fixedly connected via a plurality of connecting rods (501); and a space is provided between the outer ring (510) and the inner ring (520) to allow the hook mechanism (6) to pass through.

3. A soft soil foundation bored pile positioning device according to claim 2, characterized in that: The support mechanism (1) comprises a vertically arranged support rod (101), and a stabilizing rod (102) fixedly connected to the support rod (101) and arranged obliquely; the support member (110) comprises a support portion (111) fixedly connected to the support rod (101), and a limiting portion (112) fixed to the end of the support portion (111); the support portion (111) is arranged in a direction parallel to the cylinder (2).

4. A soft soil foundation bored pile positioning device according to claim 3, characterized in that: The bottom of the outer ring (510) is provided with a limiting groove (511) which is interference-fitted with the supporting portion (111).

5. The soft soil foundation bored pile positioning device according to claim 1, characterized in that: The hook mechanism (6) comprises a tension-bearing portion (601) of a straight rod structure and hook bodies (602) fixed at two ends of the tension-bearing portion (601), wherein the hook bodies (602) at two ends of the tension-bearing portion (601) located on the outer circumference have opposite directions, and the hook bodies (602) at two ends of the tension-bearing portion (601) located on the inner circumference have the same direction.

6. A soft soil foundation bored pile positioning device according to any one of claims 1 to 5, characterized in that: The outer side of the cylinder (2) is provided with an annular groove body (201) coaxial with the cylinder (2), the groove body (201) is provided with an external thread, the bottom of the groove body (201) is provided with a plurality of through-going strip-shaped movable holes (202), the movable holes (202) are vertically arranged and correspond to each of the stabilizing plates (3) one by one, the adjustment mechanism (4) comprises a threaded sleeve (401) arranged in the groove body (201) and threadedly connected thereto, a transmission sleeve (402) coaxially rotatably connected to the threaded sleeve (401), a transmission block (403) fixedly connected to the transmission sleeve (402) and passing through the movable hole (202), the transmission block (403) is rotatably connected to a transmission rod (404), the transmission rod (404) is rotatably connected to the stabilizing plate (3), and the stabilizing plate (3) and the cylinder (2) are also connected via a group of guide members (410).

7. A soft soil foundation bored pile positioning device according to claim 6, characterized in that: Each group of guide members (410) is provided with a plurality of guide members (410), and the guide members (410) include a guide seat (411) which is radially arranged parallel to the cylinder (2) and fixedly connected to the inner wall of the cylinder (2), and a guide rod (412) which is movably matched with the guide seat (411) and fixedly connected to the stabilizing plate (3).

8. The soft soil foundation bored pile positioning device according to claim 6, characterized in that: Two vertical adjustment plates (301) are provided on the inner side of the stabilizing plate (3), and the ends of the two adjustment plates (301) that are close to each other are rotatably connected to a rotating shaft (302) vertically fixed in the middle of the stabilizing plate (3). Screw holes (303) are provided on both sides of the stabilizing plate (3) and are threadedly connected with adjustment bolts (304). The ends of the adjustment bolts (304) are coaxially rotatably connected with a connecting seat (305), and the connecting seat (305) is movably connected to the adjustment plate (301) via a movable rod (306).

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