Soft soil foundation cast-in-situ bored pile positioning device and steel casing positioning method

Abstract

The invention provides a soft soil foundation cast-in-situ bored pile positioning device which comprises a plurality of sets of supporting mechanisms, a plurality of positioning mechanisms and a plurality of positioning 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 invention relates to the technical field of soft soil foundation bored pile positioning, and in particular to a soft soil foundation bored pile positioning device and a steel casing positioning method. Background Art

[0002] In port and waterway engineering, bored pile is a very common and highly applicable construction pile foundation. It is first drilled and then the steel casing is placed down and poured with concrete. It has the advantages of good stability, low noise and no soil squeezing effect.

[0003] Existing offshore, inland river projects and soft soil foundation bored piles generally use steel cages to support the steel casings, but this method will damage the steel cages themselves, and in the process of lowering the steel cages, the steel cages are generally lifted by a hoisting device and lowered into the hole. In this process, the effect of improving the stability of the steel casings and the accuracy of lowering is poor. After the steel casings are lowered to the designated position, when concrete is poured, the stability of the steel casings is poor, and the measures for protecting the hole wall and positioning the soft soil foundation are not very sound. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a soft soil foundation bored pile positioning device and a steel casing positioning method, which can improve the stability of the steel casing and reduce deviation.

[0005] According to an embodiment of the present invention, there is provided a soft soil foundation bored pile positioning device, comprising:

[0006] A supporting mechanism, wherein the supporting mechanism is provided in a plurality of groups, and each group of the supporting mechanism is provided with a plurality of supporting members distributed in a vertical direction;

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

[0008] A stabilizing plate, wherein a plurality of stabilizing plates are provided and located inside the cylinder, and the stabilizing plate is 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 is detachably connected to the bearing mechanism, and two groups of hook mechanisms are provided. The two groups of hook mechanisms are distributed along two concentric circles, and a space for accommodating the steel casing is formed between the two groups of hook mechanisms.

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

[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] According to an embodiment of the present invention, a steel casing positioning method is also provided, comprising the following steps:

[0019] When lowering the steel casing by the lifting device, after the steel casing enters the inner side of the casing, adjust the position of the stabilizing plate and the adjusting plate so that the adjusting plate is close to the side wall of the steel casing to prevent the steel casing from shaking;

[0020] When the steel casing is lowered to the specified depth, the bearing mechanism and the supporting parts are assembled, and the hook mechanism is used to position the inner and outer sides of the steel casing to keep its position fixed, and then the steel casing is separated from the lifting device;

[0021] When pouring concrete to the bottom of the steel casing, first retract the outer hook mechanism. After the pouring is completed, slowly lift the steel casing and the inner hook mechanism.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 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.

[0024] A bearing mechanism is also connected to the supporting mechanism, and two sets of hook mechanisms are connected to the bearing mechanism. Both sets of hook mechanisms are equipped with multiple hooks, which provide pulling force for the steel casing from the inside and outside of the steel casing respectively. During the concrete pouring process, its stability can be effectively improved, and the height of the bearing mechanism is adjustable, which can adapt to the lowering and positioning of steel casings with different hole depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a soft soil foundation bored pile positioning device of the present invention;

[0026] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0027] Figure 3 It is a schematic diagram of the main structure of the coordination between the stabilizing plate and the cylinder in a soft soil foundation bored pile positioning device of the present invention;

[0028] Figure 4 This is a schematic diagram of a top view of the structure of a stabilizing plate in another embodiment of a soft soil foundation bored pile positioning device of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the outer hook mechanism in a soft soil foundation bored pile positioning device of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the inner hook mechanism in a soft soil foundation bored pile positioning device of the present invention;

[0031] Figure 7 It is a schematic diagram of the coordination structure of the hook mechanism and the bearing mechanism in a soft soil foundation bored pile positioning device of the present invention;

[0032] In the above drawings: 1. Support mechanism; 101. Support rod; 102. Stabilizing rod; 110. Support member; 111. Support part; 112. Limiting part; 2. Cylinder; 201. Slot body; 202. Movable hole; 3. Stabilizing plate; 301. Adjusting plate; 302. Rotating shaft; 303. Screw hole; 304. Adjusting bolt; 305. Connecting seat; 306. Movable rod; 4. Adjusting mechanism; 401. Threaded sleeve; 402. Transmission sleeve; 403. Transmission block; 404. Transmission rod; 410. Guide member; 411. Guide seat; 412. Guide rod; 5. Carrying mechanism; 501. Connecting rod; 510. Outer ring; 511. Limiting groove; 520. Inner ring; 6. Hooking mechanism; 601. Tensile part; 602. Hook body. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Embodiment 1:

[0035] See also Figure 1 The present invention provides the following technical solution: a soft soil foundation bored pile positioning device, comprising:

[0036] A support mechanism 1, wherein the support mechanism 1 is provided in 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;

[0037] A cylinder 2, wherein the axis of the cylinder 2 is vertical and the bottom of the cylinder 2 is connected to the top of the support mechanism 1, and multiple groups of support mechanisms 1 are evenly distributed along the circumference of the cylinder 2;

[0038] A stabilizing plate 3, wherein a plurality of stabilizing plates 3 are provided and are located inside the cylinder 2, wherein the stabilizing plates 3 are connected to the cylinder 2 via an adjusting mechanism 4, wherein the plurality of stabilizing plates 3 are evenly distributed along the circumference of the cylinder 2, and the stabilizing plates 3 can be driven to move in a radial straight line along the cylinder 2 via the adjusting mechanism 4, and the positions of the plurality of stabilizing plates 3 can be adjusted to adapt to the stable operation of steel casings with different diameters;

[0039] The carrying mechanism 5 is detachably connected to the support member 110, and the carrying mechanism 5 can cooperate with the support members 110 of different heights to change the height of the carrying mechanism 5;

[0040] 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;

[0041] After the steel casing is lowered to a specified depth, two sets of hook mechanisms 6 can be used to provide a pulling effect from the inside and outside of the steel casing, and the stability of the steel casing can be effectively improved under the pulling effect of the hook mechanisms 6 on both sides.

[0042] Specifically, Figure 2 As 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 there is a space between the outer ring 510 and the inner ring 520 to allow the hook mechanism 6 to pass through;

[0043] In order to improve the stability of the hook mechanism 6, in a further embodiment, a positioning groove may be provided at the top of the outer ring 510 and the inner ring 520, and the top of the hook mechanism 6 cooperates with the positioning groove, and under the gravity of the steel casing, the stability of the hook mechanism 6 can be effectively improved;

[0044] 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, a stabilizing rod 102 fixedly connected to the support rod 101 and arranged obliquely, the support rod 101 and the stabilizing 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 to the end of the support portion 111, and the support portion 111 is arranged in a direction parallel to the cylinder 2;

[0045] The bottom of the outer ring 510 is provided with a limiting groove 511 which is interference fit with the support part 111. 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 is closely matched with the support part 111, thereby ensuring the stability of the bearing mechanism 5;

[0046] In order to facilitate the lifting from both the inner and outer sides of the steel casing, in a further embodiment, as Figure 5 , Figure 6 As shown, the hook mechanism 6 includes a tension part 601 of a straight rod structure, and hook bodies 602 fixed at both ends of the tension part 601. The hook bodies 602 at both ends of the tension part 601 located on the outer circumference are oriented in opposite directions, and the hook bodies 602 at both ends of the tension part 601 located on the inner circumference are oriented in the same direction.

[0047] like Figure 7As 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;

[0048] Embodiment 2:

[0049] In order to facilitate simultaneous adjustment of multiple stabilizing plates 3, based on the first embodiment, as shown in FIG. Figure 3 As shown, the outer side of the cylinder 2 is provided with an annular groove body 201 coaxial therewith, the groove body 201 is provided with an external thread, and the bottom of the groove body 201 is provided with a plurality of through-bar movable holes 202, the movable holes 202 are vertically arranged and correspond to each of the stabilizing plates 3 one by one, the adjusting mechanism 4 includes a threaded sleeve 401 arranged in the groove body 201 and threaded therewith, a transmission sleeve 402 coaxially rotatably connected to the threaded sleeve 401, and 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 with a transmission rod 404, and the transmission rod 404 is rotatably connected to the stabilizing plate 3, and the stabilizing plate 3 is also connected to the cylinder 2 through a group of guide members 410, and the guide members 410 are arranged along the radial direction of the cylinder 2, so that the stabilizing plate 3 can only move linearly along the radial direction of the cylinder 2;

[0050] With the cooperation of the transmission block 403 and the movable hole 202, the transmission sleeve 402 can only move vertically, and because the transmission sleeve 402 is rotatably connected to the threaded sleeve 401, the rotating threaded sleeve 401 can drive the transmission sleeve 402 to move axially along the cylinder 2, and can synchronously drive multiple stabilizing plates 3 to move radially along the cylinder 2 through the transmission rod 404, so as to adapt to steel casings of different diameters, and after the adjustment is completed, even if the stabilizing plate 3 is subjected to a force, the transmission sleeve 402 cannot be driven to move through the transmission rod 404, so that the stability of the stabilizing plate 3 can be ensured;

[0051] Specifically, each group of the guide members 410 is provided with a plurality of guide members 410, and the guide members 410 include a guide seat 411 which is arranged parallel to the radial direction of 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;

[0052] In order to more carefully limit the horizontal shaking of the steel casing, in a further embodiment, Figure 4As shown, 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 close to each other are rotatably connected to a rotating shaft 302 vertically fixed to the middle of the stabilizing plate 3, and screw holes 303 are provided on both sides of the stabilizing plate 3 and are threaded with adjustment bolts 304, and the ends of the adjustment bolts 304 are coaxially rotatably connected to a connecting seat 305, and the connecting seat 305 is movably connected to the adjustment plate 301 through a movable rod 306;

[0053] 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 fine-tuned to make it sufficiently close to the outer wall of the steel casing, which can effectively improve its stability during the lowering process of the steel casing.

[0054] Embodiment three:

[0055] The present invention also provides a steel casing positioning method, comprising the following steps:

[0056] When lowering the steel casing by the 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 sufficiently close to the side wall of the steel casing to prevent the steel casing from shaking;

[0057] When the steel casing is lowered to the specified depth, the bearing mechanism 5 and the support member 110 are assembled, and the hook mechanism 6 is used to position the inner and outer sides of the steel casing to keep its position fixed, and then the steel casing is separated from the lifting device;

[0058] When pouring concrete to the bottom of the steel casing, first retract the outer hook mechanism 6, and then slowly lift the steel casing and the inner hook mechanism 6 after the pouring is completed.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

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).

9. A method for positioning a steel casing, characterized in that: The following steps are involved: When lowering the steel casing by the lifting device, after the steel casing enters the inner side of the casing, adjust the position of the stabilizing plate and the adjusting plate so that the adjusting plate is close to the side wall of the steel casing to prevent the steel casing from shaking; When the steel casing is lowered to the specified depth, the bearing mechanism and the supporting parts are assembled, and the hook mechanism is used to position the inner and outer sides of the steel casing to keep its position fixed, and then the steel casing is separated from the lifting device; When pouring concrete to the bottom of the steel casing, first retract the outer hook mechanism. After the pouring is completed, slowly lift the steel casing and the inner hook mechanism.

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