Reinforcement cage positioning device and positioning construction method

Abstract

The invention discloses a reinforcement cage positioning device and a positioning construction method, and relates to the technical field of civil engineering. The positioning device comprises a circular hoop and sleeving positioning pipes, the circular hoop is vertically provided with the multiple sleeving positioning pipes, and the multiple sleeving positioning pipes are connected with vertically-arranged steel bars of the reinforcement cage in a sleeving mode and abut against transversely-arranged steel bars of the reinforcement cage; the multiple outer abutting positioning pieces are arranged on the outer side of the circular hoop and / or arranged on the other side, opposite to the circular hoop, of the sleeving positioning pipe, and the multiple outer abutting positioning pieces abut against the inner wall of the steel casing; and the fastening rope is used for tensioning, connecting and sleeving the positioning pipe and the reinforcement cage. According to the reinforcement cage positioning device and the positioning construction method, the positioning device has the advantages of being simple in structure, convenient to operate, capable of being recycled and reused and low in manufacturing and using cost, and the construction method can greatly reduce the operation difficulty of adjusting and positioning a body of a reinforcement cage in a steel casing through the positioning device.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and particularly relates to a steel reinforcement cage positioning device and a positioning construction method. Background Technique

[0002] The bored cast-in-place pile is a widely used foundation form in civil engineering. Its top is connected to structures such as the bearing platform or pier, and it is located at a certain depth below the original ground or riverbed. After the pile foundation is drilled, a steel reinforcement cage needs to be inserted into the hole and centered inside the pile hole and the drilling steel casing at its top.

[0003] However, since the diameter of the steel casing is 200 mm to 400 mm larger than the diameter of the pile foundation, and the designed and manufactured steel reinforcement cage is relatively long, when the steel reinforcement cage is inserted into the pile hole, its upper end often deviates from the center of the steel casing due to deflection deformation. And the deviation of the steel reinforcement cage from the center of the steel casing is equivalent to deviating from the center of the pile foundation, which will cause the strength of the pile foundation to decrease and pose a safety hazard to the pile foundation.

[0004] In this regard, the prior art discloses a deviation correction and positioning device for lowering a steel reinforcement cage of a pile foundation, including a support frame, a support column arranged on the support frame for supporting the steel reinforcement cage, a plurality of positioning support blocks arranged at intervals below the support column for abutting against the inner side wall of the steel casing, a plurality of correction plates arranged at intervals below the positioning support blocks for abutting against the inner side wall of the steel reinforcement cage, a calibration adjustment mechanism arranged between the support column and the support frame for making a plurality of positioning support blocks abut against the inner wall of the steel casing and a plurality of correction plates abut against the inner wall of the steel reinforcement cage so that the center of the steel casing coincides with the center of the steel reinforcement cage, and a self-locking hoisting mechanism arranged between the support column and the steel reinforcement cage for hoisting the steel reinforcement cage. This device has the effects of making it difficult for the steel reinforcement cage to be skewed after being lowered, improving the accuracy of the lowering position of the steel reinforcement cage, and improving the bearing capacity, stability and service life of the pile foundation.

[0005] However, the above device still has the following defects: 1. The structure of the positioning device is complex, and the professional requirements for technicians are also relatively high, which in turn leads to a relatively high maintenance cost of the positioning device.

[0006] 2. When adjusting the position of the steel reinforcement cage in the pile hole and the steel casing, the steel reinforcement cage is lifted by the self-locking hoisting mechanism, and its entire weight is also borne by the support frame, which requires too high equipment requirements for the self-locking hoisting mechanism and strength requirements for the support column.

[0007] 3. When using this positioning device to correct the position of the steel reinforcement cage, the construction personnel need to lift the already lowered steel reinforcement cage again, and this operation has a very poor combination with the lowering construction operation of the steel reinforcement cage, resulting in serious waste of construction resources.

[0008] 4. When construction workers lift the steel reinforcement cage through the self-locking hoisting mechanism, in order to ensure the balanced force of multiple lifting ropes, they need to lay the entire support frame as flat as possible on the ground around the pile hole, and the laying accuracy requirements for the support frame are also relatively high. Summary of the Invention

[0009] The present invention provides a steel reinforcement cage positioning device and a positioning construction method. The positioning device has a simple structure, can be lowered and installed together with the steel reinforcement cage, and can be recycled after the installation of the steel reinforcement cage is completed, so as to solve at least one of the above technical problems.

[0010] The technical solution of the present invention to solve the above problems is: to provide a steel reinforcement cage positioning device for positioning the steel reinforcement cage in the steel casing. The positioning device includes: A circular hoop and socket positioning pipes. A plurality of socket positioning pipes are vertically arranged on the circular hoop. The plurality of socket positioning pipes are all movably sleeved and connected with the vertically arranged steel bars of the steel reinforcement cage, and the plurality of socket positioning pipes all abut against the horizontally arranged steel bars of the steel reinforcement cage; Outer abutting positioning members. There are a plurality of the outer abutting positioning members, and the plurality of outer abutting positioning members are arranged on the outer side of the circular hoop and / or on the other side of the socket positioning pipe opposite to the circular hoop. The plurality of outer abutting positioning members all abut against the inner wall of the steel casing; A fastening rope, which tightly connects the socket positioning pipe and the steel reinforcement cage.

[0011] Further, there are a plurality of the circular hoops, and the plurality of circular hoops are vertically arranged at equal intervals. Each socket positioning pipe is fixedly connected to the plurality of circular hoops.

[0012] Further, the socket positioning pipe includes a steel bar socket pipe and an external socket pipe that are inserted and connected to each other. The steel bar socket pipe is fixedly arranged on the circular hoop, and the external socket pipe extends upward outside the steel casing.

[0013] Further, a ring body is fixedly arranged at the upper end of the socket positioning pipe, and one end of the fastening rope is tightly connected at the ring body.

[0014] Further, a tight rope device is also fixedly arranged at the upper end of the socket positioning pipe. The other end of the fastening rope bypasses the steel bar of the steel reinforcement cage and is fixedly connected upward with the fastening rope.

[0015] Further, the fastening rope also winds around the circular hoop.

[0016] Further, along the vertically downward direction, the distance from the outer abutting positioning member to the circular hoop gradually decreases.

[0017] Further, the circular hoop is a steel bar circular hoop, the socket positioning pipe is a steel pipe, and the fastening rope is a steel wire rope.

[0018] The present invention also provides a construction method for positioning a steel reinforcement cage, which is used to install the above positioning device into a steel casing to position the steel reinforcement cage. The positioning construction method includes the following steps: Step S1, before lowering the steel reinforcement cage or before the upper end of the steel reinforcement cage is flush with the upper end of the steel casing when the steel reinforcement cage is lowered, the socket positioning pipe of the positioning device is sleeved at the upper end of the vertical steel bar of the steel reinforcement cage corresponding to the socket positioning pipe vertically. Step S2, the fastening rope passes through the cage holes of the steel reinforcement cage, bypasses the horizontally arranged steel bars of the steel reinforcement cage, and both ends of the fastening rope are upward and fastened and fixedly connected to the socket positioning pipe. Then, the fastening rope is tightened so that the positioning device is tensioned and arranged at the upper end of the steel reinforcement cage. Step S3, after the steel reinforcement cage is lowered in place, pour pile foundation concrete into the pile hole until the height of the pile foundation concrete in the pile hole is flush with or after the top of the steel reinforcement cage that has been lowered in place. Then, untie the fastening rope, and then lift and hoist the positioning device to separate the positioning device from the steel reinforcement cage, and lift the positioning device out of the pile hole. Step S4, clean the lifted positioning device.

[0019] Further, in step S2, after passing through the cage holes of the steel reinforcement cage, one end of the fastening rope is first wound or knotted with the circular hoop upward, and then continues to extend upward to be fixedly connected to the socket positioning pipe.

[0020] A positioning device for a steel reinforcement cage of the present invention has the following beneficial effects: 1. The positioning device is limitedly connected to the steel reinforcement cage through the socket positioning pipe, and positions the steel casing through a plurality of outer abutting positioning members, so that the main body part of the steel reinforcement cage located in the steel casing always remains centered, thereby ensuring the quality of the pile foundation.

[0021] 2. The positioning device has the advantages of simple structure, convenient operation, recyclable and reusable, low manufacturing and use costs, etc.

[0022] A construction method for positioning a steel reinforcement cage of the present invention has the following beneficial effects: 1. The positioning device is lowered and installed together with the steel reinforcement cage to position the part of the main body of the steel reinforcement cage extending into the steel casing within the steel casing. This construction method effectively combines the operation of constructing and installing the positioning device with the operation of constructing and installing the steel casing, abandoning the construction idea of first installing the steel reinforcement cage and then adjusting the position of the steel reinforcement cage through the positioning device, greatly reducing the construction and installation cost of the positioning device and the operation difficulty of positioning and adjusting the position of the steel reinforcement cage through the positioning device.

[0023] 2. The positioning device and the steel reinforcement cage are tightly connected to each other through a fastening rope, which can ensure that when the steel reinforcement cage and the positioning device are lowered, the positioning device will not be separated from the steel reinforcement cage due to the contact resistance between its outer abutting positioning member and the steel casing, so as to ensure that during the process of lowering the steel reinforcement cage, the positioning device can always abut against the steel casing and position the steel reinforcement cage; when the steel reinforcement cage is lowered in place and the height of the pile foundation concrete poured in the pile hole is flush with or above the top end of the steel reinforcement cage, the steel reinforcement cage is wrapped by the pile foundation concrete and will no longer deform; at this time, the construction personnel can untie the fastening rope so that the construction personnel can pull the positioning device out of the steel casing upward again; so as to achieve the purpose of repeatedly using the positioning device to sequentially position the parts of multiple steel reinforcement cages located in the steel casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention. In these drawings, like reference numerals are used to represent like elements. The drawings in the following description are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 is the structural diagram of the positioning device of this embodiment; Figure 2 is the step flow chart of the positioning construction method of this embodiment; 1 - circular hoop, 2 - socket positioning pipe, 21 - steel bar sleeve pipe, 22 - external sleeve pipe, 23 - ring body, 24 - tight rope device, 3 - outer abutting positioning member, 4 - fastening rope; 5 - steel reinforcement cage, 6 - steel casing, 7 - pile hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In this specification, orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc., which are mentioned or may be mentioned, are defined with respect to the structures shown in the respective drawings. The terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. They are relative concepts and may accordingly change depending on their different positions and usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0027] Please refer to Figure 1 , and with reference to Figure 1 the orientation shown, a steel cage positioning device according to a specific embodiment of the present invention is used to position a steel cage inside a steel casing. The positioning device includes a circular hoop 1, a socket positioning tube 2, an outer abutting positioning member 3, and a fastening rope 4. Among them, the circular hoop 1 is a circular steel bar formed by welding the heads and tails of steel bars. The diameter of the circular hoop 1 is approximately equal to the diameter of the steel cage. There are four socket positioning tubes 2, and the four socket positioning tubes 2 are respectively welded on the inner side of the circular hoop 1 according to the front, back, left, and right orientations. Moreover, the four socket positioning tubes 2 are all aligned downward with a vertically arranged steel bar of the steel cage. The outer abutting positioning member 3 is a steel bar structure with a shape similar to the handle of a cup. One outer abutting positioning member 3 is welded on each socket positioning tube 2, and the outer abutting positioning member 3 is arranged in the radial direction of the circular hoop 1. The fastening rope 4 is used to tightly connect the socket positioning tube 2 and the steel cage.

[0028] In addition, please refer to Figure 1 , in this embodiment, the sum of the maximum distance from the outer abutting positioning member 3 to the circular hoop 1 and the radius of the circular hoop 1 itself is slightly less than or equal to the radius of the steel casing.

[0029] In this regard, construction workers can align and socket the socket positioning tube 2 onto the vertically arranged steel bar of the steel cage to set the positioning device at the upper end of the steel cage. Then, use the fastening rope 4 to tightly connect the socket positioning tube 2 and the steel cage to prevent the positioning device from separating from the steel cage during the process of being lowered together with the steel cage. And during the process of lowering the steel cage, the positioning device continuously abuts against the steel casing through multiple outer abutting positioning members 3, so that the circular hoop 1 can be centered inside the steel casing, and at the same time, the circular hoop 1 can also bring the upper end of the steel cage to be centered inside the steel casing, so as to realize the positioning of the upper end part of the steel cage extending into the steel casing.

[0030] It should be noted that in other embodiments, the number of socket positioning tubes 2 can be two, three, five or more; moreover, on the premise of ensuring that the positioning device can position the steel cage, it is not necessary for all the socket positioning tubes 2 to be socketed with the vertically arranged steel bars of the steel cage.

[0031] In addition, in other embodiments, the outer abutting positioning member 3 can also be directly welded on the circular hoop 1.

[0032] Further, in order to prevent the positioning device itself from deforming, in this embodiment, there are two circular hoops 1, and the two circular hoops 1 are arranged vertically opposite to each other. A plurality of socket positioning tubes 2 are welded to both circular hoops 1 at the same time, so as to further improve the overall structural strength of the positioning device.

[0033] Further, please refer to Figure 1 , in this embodiment, two rings 23 are welded to the upper end of the socket positioning tube 2. One end of the fastening rope 4 is tied to one of the rings 23, and the other end of the fastening rope 4 extends downward, passes through the cage holes of the steel reinforcement cage, and then extends upward from the inside of the steel reinforcement cage to be tied and connected to the other ring 23. In this regard, when the construction worker ties the other end of the fastening rope 4 to the other ring 23, the fastening rope 4 can be tightened, so that the socket positioning sleeve can be tightened by the fastening rope 4 and sleeved on the vertically arranged steel bars of the steel reinforcement cage and will not easily come off. In this way, in the case of the contact resistance between the outer abutting positioning member 3 and the steel casing, the positioning device can still be lowered together with the steel reinforcement cage to position the steel reinforcement cage.

[0034] Further, in this embodiment, in order to improve the fastening connection effect of the fastening rope 4 on the positioning device and the steel reinforcement cage, and in order to facilitate lifting the positioning device upward separately, before the fastening rope 4 passes through the cage holes of the steel reinforcement cage, the construction worker also winds the fastening rope 4 around one circular hoop 1 at least one turn, and then makes at least one knot on the other circular hoop 1, so that when the construction worker can separate the positioning device from the steel reinforcement cage by untying the fastening rope 4, but the fastening rope 4 is still tied and connected to the circular hoop 1.

[0035] It should be noted that: in other embodiments, the fastening rope 4 can be knotted with both circular hoops 1, or wound around both circular hoops 1.

[0036] In addition, in other embodiments, the number of circular hoops 1 can also be three or more.

[0037] Further, in this embodiment, in order to facilitate tightening the fastening rope 4, a rope tightener 24 is also tied and arranged at one of the rings 23. One end of the fastening rope 4 is fixedly connected to the rope tightener 24, so that the construction worker can tighten the fastening rope 4 by controlling the rope tightener 24 to tighten the positioning device and the steel reinforcement cage.

[0038] Further, in this embodiment, in order to facilitate lifting the positioning device later, the socket positioning tube 2 includes a steel bar socket tube 21 and an external socket tube 22. The external socket tube 22 is sleeved on the upper end of the steel bar socket tube 21, and the steel bar socket tube 21 is sleeved downward on the vertically arranged steel bars of the steel reinforcement cage; moreover, after the steel reinforcement cage is lowered in place, the external socket tube 22 can still extend to a position above the upper end opening of the steel casing.

[0039] In addition, please refer to Figure 1 , in this embodiment, the shape of the outer abutting positioning member 3 is similar to the handle of a teacup, and it is in the vertically downward direction. The distance from the outer abutting positioning member 3 to the circular hoop 1 gradually decreases, so that in addition to being able to keep the whole positioning device centered by abutting against the steel casing, the outer abutting positioning member 3 can also guide the lowering of the positioning device and the steel reinforcement cage.

[0040] In this embodiment, the socket positioning pipe 2 is a steel pipe, and the fastening rope 4 is a steel wire rope.

[0041] In addition, please refer to Figure 2 , a construction method for positioning a steel reinforcement cage in a specific embodiment of the present invention is used to install the positioning device in the above embodiment into the steel casing to position the steel reinforcement cage. The positioning construction method includes the following steps: Step S1, before lowering the steel reinforcement cage or before the upper end of the steel reinforcement cage is flush with the upper end of the steel casing, sleevedly arrange the socket positioning pipe 2 of the positioning device at the upper end of the vertical steel bars of the steel reinforcement cage that are vertically corresponding to the socket positioning pipe 2; Step S2, pass the fastening rope 4 through the cage holes of the steel reinforcement cage, and make both ends of the fastening rope 4 upward and fixedly tied to the socket positioning pipe 2, and then tighten the fastening rope 4 so that the positioning device is tightly arranged at the upper end of the steel reinforcement cage; Step S3, lower the steel reinforcement cage. After the steel reinforcement cage is lowered in place, pour pile foundation concrete into the pile hole until the height of the pile foundation concrete in the pile hole is flush with or after the top of the steel reinforcement cage that has been lowered in place. Untie the fastening rope 4, and then lift and hoist the positioning device to separate the positioning device from the steel reinforcement cage, and lift the positioning device out of the pile hole; Step S4, clean the lifted positioning device.

[0042] It should be noted that in this embodiment, most of the structures of the positioning device are similar to the structural forms of the steel reinforcement cage. Therefore, construction workers can manufacture a positioning device with the same size and specifications as the steel reinforcement cage while manufacturing the steel reinforcement cage to save manufacturing costs.

[0043] In addition, when construction workers use the fastening rope 4 to fixedly connect the steel reinforcement cage and the socket positioning pipe 2, they also need to wind or tie the fastening rope 4 to the circular hoop 1 to ensure that after positioning, construction workers can still use the fastening rope 4 as a connection object to lift the entire positioning device out of the steel casing for repeated use.

[0044] For those not mentioned above, the prior art is applicable.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reinforcement cage positioning device for positioning the reinforcement cage in a steel casing, characterized in that: The positioning device comprises: A circular hoop (1) and a sleeve positioning tube (2), wherein a plurality of sleeve positioning tubes (2) are vertically arranged on the circular hoop (1), the plurality of sleeve positioning tubes (2) are all movably sleeved and connected to the vertically arranged steel bars of the steel cage, and the plurality of sleeve positioning tubes (2) are all in contact with the transversely arranged steel bars of the steel cage; an external abutment positioning member (3), wherein a plurality of the external abutment positioning members (3) are provided, and the plurality of the external abutment positioning members (3) are arranged on the outside of the circular hoop (1) and / or on the other side of the sleeve positioning tube (2) opposite to the circular hoop (1), and the plurality of the external abutment positioning members (3) are all in abutment with the inner wall of the steel casing; A tightening rope (4), the tightening rope (4) tightening and connecting the transversely arranged steel bars of the steel cage and the sleeve positioning tube (2).

2. The positioning device according to claim 1, characterized in that A plurality of the circular hoops (1) are provided, and the plurality of the circular hoops (1) are arranged vertically equidistantly, and each of the sleeve positioning tubes (2) is fixedly connected to the plurality of the circular hoops (1).

3. The positioning device according to claim 1, characterized in that: The sleeve positioning tube (2) comprises a steel sleeve tube (21) and an external sleeve tube (22) which are plugged into each other, the steel sleeve tube (21) being fixedly arranged on the circular hoop (1), and the external sleeve tube (22) extending upwards to the outside of the steel casing.

4. The positioning device according to claim 1, characterized in that: A ring body (23) is fixedly provided at the upper end of the sleeve positioning tube (2), and one end of the fastening rope (4) is fastened and connected to the ring body (23).

5. The positioning device according to claim 4, characterized in that: A rope tightener (24) is fixedly provided on the upper end of the sleeve positioning tube (2), and the other end of the tightening rope (4) passes around the steel bars of the steel cage and is fixedly connected to the tightening rope (4) upward.

6. The positioning device according to claim 1, characterized in that: The fastening rope (4) is also wound around the hoop (1).

7. The positioning device according to claim 1, characterized in that: In the vertical downward direction, the distance between the outer abutment positioning member (3) and the circular hoop (1) gradually decreases.

8. The positioning device according to claim 1, characterized in that: The round hoop (1) is a steel bar round hoop, the sleeve positioning tube (2) is a steel tube, and the fastening rope (4) is a steel wire rope.

9. A method for positioning a steel cage, for installing a positioning device as claimed in any one of claims 1 to 8 into a steel casing to position the steel cage, characterized in that: The positioning construction method comprises the following steps: Step S1, before lowering the steel cage or before the steel cage is lowered until the upper end of the steel cage is flush with the upper end of the steel casing, the sleeve positioning tube (2) of the positioning device is sleeved and set on the upper end of the vertical steel bar of the steel cage vertically corresponding to the sleeve positioning tube (2); Step S2, passing the fastening rope (4) through the cage hole of the steel cage, bypassing the transversely arranged steel bars of the steel cage, and making both ends of the fastening rope (4) upwardly fastened and fixedly connected to the sleeve positioning tube (2), and then tightening the fastening rope (4) so ​​that the positioning device is tightened and arranged at the upper end of the steel cage; Step S3, lowering the steel cage, and after the steel cage is lowered into place, pouring pile foundation concrete into the pile hole until the height of the pile foundation concrete in the pile hole is flush with or after the top of the lowered steel cage is flush, untying the fastening rope (4), and then lifting and hoisting the positioning device to separate the positioning device from the steel cage, and lifting the positioning device out of the pile hole.

10. The method according to claim 9, characterized in that In step S2, after passing through the cage hole of the steel cage, one end of the fastening rope (4) is firstly wound or knotted upwards and connected to the hoop (1), and then continues to extend upwards to be fixedly connected to the sleeve positioning tube (2).

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