Construction method of multi-strand anchor cable rotatable quick positioning and tensioning device

Abstract

A construction method of a multi-cable anchor rotatable quick positioning and tensioning device, the tensioning device of the construction method is provided with a rotating positioning shaft and a fixed shaft; the rotating positioning shaft is fixed below the supporting foot, and the rotating positioning shaft can rotate in the central hole of the multi-cable anchor; the fixed shaft is connected with the supporting foot through a fixed lock; one end of the fixed lock locks the fixed shaft, and the other end locks the supporting foot; the lower end of the fixed shaft is connected with the inner teeth of the multi-cable anchor head; in construction, the rotating positioning shaft can rotate around the multi-cable anchor to quickly center and position the tensioning device, which can play a centering role; the tensioning device does not need to be centered multiple times, the main device is ensured not to be displaced, and safety and quality accidents such as cable force deviation caused by off-center tensioning, component damage and collapse caused by unbalanced load are avoided.

Description

Technical Field

[0001] The invention relates to a construction method of a multi-strand anchor cable rotatable and fast-positioning tensioning device. Background Art

[0002] Existing tensioning devices are monolithic, heavy, and difficult to install. The entire construction process requires a crane to assist in installation and movement, which is inefficient and extremely expensive. Furthermore, monolithic tensioning devices cannot be fixed and are prone to twisting and overturning, posing a significant safety risk. Summary of the Invention

[0003] Due to market factors, there is an urgent need for lightweight, fast, and efficient tensioning devices that can reduce crane usage. The present invention provides a construction method for a multi-strand anchor cable tensioning device that can be rotated and quickly positioned. This construction method does not require crane assistance for movement, installation, or removal, and the entire tensioning process requires no crane assistance, significantly saving costs and improving market competitiveness. Furthermore, the tensioning device can be quickly secured via a fixed shaft, making it safe and reliable, significantly reducing safety risks.

[0004] The technical solution adopted by the present invention is: a construction method for a multi-strand anchor cable that can be rotated and quickly positioned for tensioning, wherein the supporting foot of the tensioning device is provided with a rotating positioning shaft and a fixed shaft; the rotating positioning shaft is fixed below the supporting foot, and the rotating positioning shaft can rotate in the center hole of the multi-strand anchor; the fixed shaft is connected to the supporting foot through a fixing lock; one end of the fixing lock locks the fixing shaft, and the other end locks the supporting foot; the lower end of the fixed shaft is connected to the inner teeth of the multi-strand anchor head; during construction, the rotating positioning shaft can rotate around the center of the multi-strand anchor to quickly center and position the tensioning device.

[0005] A further technical solution is: a construction method for a multi-strand anchor cable rotatable and quickly positioned tensioning device, comprising the following steps: S1: installing a support foot: installing the support foot on the multi-strand cable anchor, and quickly positioning the support foot by inserting a rotating positioning shaft into a center hole on the multi-strand cable anchor, so that the mounting hole of the rotating support foot corresponds to the position of the first cable strand N1; then installing a fixed shaft into the anchor head, and then locking the fixed shaft with one end of a fixed lock and the other end of the fixed lock with the support foot;

[0006] S2: Install the jack above the support legs. The installed jack is equipped with an oil pump. Then install the tension rod and cable strands, and lock the tension rod with the tension nut.

[0007] S3: tension the first cable strand N1 according to the tension control stress;

[0008] S4: Unload the anchor to zero pressure, remove the fixing lock, fixing shaft and tensioning rod, rotate the rotating support foot so that the mounting hole of the rotating support foot corresponds to the position of the second cable strand N2, connect the tensioning rod to the second cable strand N2, install and tighten the fixing lock, start the oil pump, and tension the second cable strand N2 according to the tension control stress;

[0009] S5. Repeat step S4 until the tensioning of the Nth cable strand is completed.

[0010] Its further technical solution is: the supporting leg includes two supporting leg columns and a top plate, the two supporting leg columns are connected perpendicularly to the top plate, and the rotation positioning axis is arranged under one of the supporting leg columns; the top plate is provided with a mounting hole for installing the tension rod.

[0011] A further technical solution is that the vertical distance from the center point of the mounting hole of the support foot to the central axis of the rotation positioning shaft is equal to the distance from the center point of the center hole to the center point of the through hole of the multi-strand cable anchor.

[0012] Due to the adoption of the above technical solution, the construction method of the multi-strand anchor cable rotatable rapid positioning tensioning device of the present invention has the following beneficial effects:

[0013] The current tensioning device is too heavy and requires a crane to move, install, and remove. This makes installation and removal inconvenient and inefficient. It is also prone to rotation and tipping, posing a significant safety risk and making alignment difficult.

[0014] A construction method for a multi-strand anchor cable with a rotatable, fast-positioning tensioning device. The tensioning device is easy to install, saving a significant amount of time on installation, centering, and adjustment, greatly improving work efficiency and ensuring construction quality and safety. Its lightweight design (40 kg) facilitates on-site installation and transfer, eliminating the need for lifting equipment and significantly reducing crane costs. The details are as follows:

[0015] The rotating positioning shaft 1 in this tensioning device rotates around the center of the multi-strand anchor 2 for rapid centering and positioning. This eliminates the need for multiple centering of the tensioning device (as with previous tensioning devices, which required centering once per anchor cable and multiple times per anchor head), saving time and ensuring that the main device (i.e., the tensioning device, consisting of the multi-strand anchor 2, jack 6, tensioning rod 5, tensioning nut 7, and support foot 4) remains in place. This prevents safety and quality hazards such as cable force deviation caused by misaligned tensioning, component damage and collapse due to eccentric loading, and other safety and quality issues. Furthermore, the rotating positioning shaft 1 can rotate 360 ​​degrees, improving installation efficiency and significantly saving time.

[0016] The fixed shaft 8 in this tensioning device can quickly fix the main device. The rotating positioning shaft 1 and the fixed shaft 8 are used in conjunction to fix the tensioning device, avoiding displacement and overturning to cause safety accidents, and greatly improving safety and reliability.

[0017] The tensioning device is light, does not need to be moved, installed and disassembled with the aid of a crane, and does not need the aid of a crane during the whole tensioning period, thereby greatly saving cost and improving market competitiveness.

[0018] Therefore, the construction method of the tensioning device for the multi-cable anchor cable rotatable and fast positioning tensioning device is rotatable and positioned, convenient to move, install and disassemble and center, and can be operated by one person, thereby saving crane cost and saving the construction of crane working platform and crane driving path, and having remarkable economic effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Figure 1 is a schematic view of a tensioning device assembly structure of a construction method of a tensioning device for a multi-cable anchor cable rotatable and fast positioning tensioning device.

[0020] In the figure:

[0021] 1-rotatable positioning shaft, 2-multi-cable anchor device, 3-connection sleeve, 4-supporting foot, 5-tensioning rod, 6-jack, 7-tensioning nut, 8-fixed shaft, 9-fixed lock, 10-multi-cable anchor head, 11-locking nut, 12-anchor pad bearing platform. DETAILED DESCRIPTION

[0022] A construction method of a tensioning device for a multi-cable anchor cable rotatable and fast positioning tensioning device, the supporting foot of the tensioning device is provided with a rotatable positioning shaft 1 and a fixed shaft 8; the rotatable positioning shaft 1 is fixed below the supporting foot 4, and the rotatable positioning shaft 1 can rotate in the center hole of the multi-cable anchor device 2; the fixed shaft 8 is connected with the supporting foot 4 through the fixed lock 9; one end of the fixed lock 9 locks the fixed shaft 8, and the other end locks the supporting foot 4; the lower end of the fixed shaft 8 is connected with the inner teeth of the multi-cable anchor head; in construction, the rotatable positioning shaft 1 can rotate around the multi-cable anchor device 2 to quickly center and position the tensioning device.

[0023] The tensioning device in the embodiment is shown in Figure 1 Figure 1, and the tensioning device has a tensioning capacity of about 40 kg and is composed of a multi-cable anchor device 2, a jack 6, a tensioning rod 5, a tensioning nut 7 and a supporting foot 4; the tensioning device further includes a rotatable positioning shaft 1 and a fixed shaft 8; the rotatable positioning shaft 1 is fixed below the supporting foot 4, and the size of the rotatable positioning shaft 1 is adapted to the size of the center hole of the multi-cable anchor device 2; the rotatable positioning shaft 1 can rotate in the center hole of the multi-cable anchor device 2 to play a centering role; the fixed shaft 8 is connected with the supporting foot 4 through the fixed lock 9; one end of the fixed lock 9 locks the fixed shaft 8, and the other end locks the supporting foot 4; the lower end of the fixed shaft 8 is connected with the inner teeth of the multi-cable anchor head 10; the fixed shaft 8 plays a role of fixing the tensioning device, thereby avoiding displacement and overturning of the tensioning device.

[0024] In the assembled state, the rotational positioning shaft 1 is inserted into the center hole of the multi-strand cable anchor 2, achieving positioning rotation. The support foot 4 is mounted with a jack 6. The lower end of the tensioning rod 5 passes through the jack 6 and the support foot 4 and is connected to the inner thread of the connecting sleeve 3. The upper end of the tensioning rod 5 is connected to the tensioning nut 7 and locked to the upper end of the jack 6. The outer thread of the connecting sleeve 3 is connected to the multi-strand cable anchor head 10. The multi-strand cable anchor head 10 is fixed inside the through hole of the multi-strand cable anchor 2 by a locking nut 11. The multi-strand cable anchor 2 is connected to the anchor plate base 12. After tensioning, the anchor nut 11 is anchored to the multi-strand cable anchor 2.

[0025] The support leg 4 of this embodiment includes two support leg columns and a top plate. The two support leg columns are connected perpendicularly to the top plate. The rotational positioning shaft 1 is arranged below one of the support leg columns. The top plate is provided with a mounting hole for mounting the tension rod 5. The vertical distance L from the center point O of the mounting hole of the support leg 4 to the center axis I of the rotational positioning shaft 1 is equal to the distance from the center point of the center hole to the center point of the through hole of the multi-strand cable anchor 2. This ensures that the distance between the center axis of the tension rod 5 and the center axis I of the rotational positioning shaft 1 is exactly equal to the distance from the center hole of the multi-strand cable anchor 2 to the center point of each through hole of the multi-strand cable anchor 2. Therefore, the device can be quickly centered and positioned. The center hole of the multi-strand cable anchor 2 in this device can also be a through hole on the multi-strand cable anchor 2.

[0026] In this embodiment, the fixing lock 9 can be a crossbar, one end of which is fixedly connected to the fixing shaft 8 by bolts, and the other end of which is also fixedly connected to the support leg 4 by bolts; or one end of the crossbar is fixedly connected to the fixing shaft 8 by bolts, and the other end of the crossbar is directly welded to the support leg 4. The fixing shaft 8 is ensured to have a detachable function.

[0027] This device is independent of height, width, or shape. Its principle is that a rotating positioning shaft 1 rotates around the center of a multi-strand anchor 2 for rapid centering and positioning. A fixed shaft 8, coupled with a locking lock 9, quickly secures the tensioning device. This device is suitable for multiple-cycle tensioning of 1-N strands of anchor cable, where N strands is determined by the design tensioning force. The controlled tensioning stress for each strand is 0.55 fptk. Using single-end tensioning at the front anchor surface and a dual-control principle, it is suitable for tensioning anchor cables in a variety of applications, including bridges, dams, ports, airports, slopes, foundation pits, liquefied gas tanks, and nuclear power plants.

[0028] The construction method of the aforementioned multi-strand anchor cable rotatable and fast positioning tensioning device is as follows:

[0029] S1: Install the support foot: Install the support foot on the multi-strand cable anchor. Insert the rotating positioning shaft into the center hole of the multi-strand cable anchor to quickly position it so that the mounting hole of the rotating support foot 4 corresponds to the position of the first cable strand N1. Then install the fixing shaft into the anchor head, and then lock the fixing shaft with one end of the fixing lock and the other end of the fixing lock with the support foot.

[0030] S2: Install the jack. Install the jack above the support foot. The installed jack has an oil pump. Then install the tension rod 5 and the cable strands. Lock the tension rod 5 with the tension nut 7.

[0031] S3: tension the first cable strand N1 according to the tension control stress;

[0032] S4: Unload the anchor to zero pressure, remove the fixing lock 9, fixing shaft 8 and tensioning rod, rotate the rotating support foot 4 so that the mounting hole of the rotating support foot 4 corresponds to the position of the second cable strand N2, connect the tensioning rod to the second cable strand N2, install and tighten the fixing lock 9, start the oil pump, and tension the second cable strand N2 according to the tension control stress;

[0033] S5. Repeat step S4 until the tensioning of the Nth cable strand is completed.

[0034] The construction method of the multi-strand anchor cable rotatable fast positioning tensioning device of the present invention has the advantages of fast positioning, no need for centering adjustment, 360° rotation, applicability for tensioning different cable strands, simple and lightweight design, and no need for lifting facilities and equipment.

[0035] The parts not covered by the present invention are the same as the existing technologies or can be implemented by using the existing technologies. The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be considered that the specific implementation of the present invention is limited to the description of the above embodiments. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of patent protection of the present invention as determined by the submitted claims.

Claims

1. A construction method for a multi-strand anchor cable rotatable and fast positioning tensioning device, characterized in that: The support foot of the tensioning device is equipped with a rotating positioning shaft and a fixed shaft; the rotating positioning shaft is fixed below the support foot, and the rotating positioning shaft can rotate in the center hole of the multi-strand cable anchor; the fixed shaft is connected to the support foot through a fixing lock; one end of the fixing lock locks the fixing shaft, and the other end locks the support foot; the lower end of the fixed shaft is connected to the inner teeth of the multi-strand cable anchor head; during construction, the rotating positioning shaft can rotate around the center of the multi-strand cable anchor to quickly align the tensioning device; The construction method comprises the following steps: S1: Install the support foot: Install the support foot on the multi-strand cable anchor. Insert the rotating locating shaft into the center hole of the multi-strand cable anchor to quickly position it so that the mounting hole of the rotating support foot corresponds to the position of the first cable strand N1. Then install the fixed shaft into the anchor head, and then lock the fixed shaft with one end of the fixed lock and the other end of the fixed lock with the support foot. S2: Install the jack above the support legs. The installed jack is equipped with an oil pump. Then install the tension rod and cable strands, and lock the tension rod with the tension nut. S3: tension the first cable strand N1 according to the tension control stress; S4: Unload the anchor to zero pressure, remove the fixing lock, fixing shaft and tensioning rod, rotate the rotating support foot so that the mounting hole of the rotating support foot corresponds to the position of the second cable strand N2, connect the tensioning rod to the second cable strand N2, install and tighten the fixing lock, start the oil pump, and tension the second cable strand N2 according to the tension control stress; S5. Repeat step S4 until the tensioning of the Nth cable strand is completed.

2. The construction method of a multi-strand anchor cable rotatable rapid positioning tensioning device according to claim 1, characterized in that: The supporting foot includes two supporting foot columns and a top plate. The two supporting foot columns are connected perpendicularly to the top plate. The rotation positioning shaft is arranged under one of the supporting foot columns. The top plate is provided with a mounting hole for mounting a tensioning rod.

3. The construction method of a multi-strand anchor cable rotatable rapid positioning tensioning device according to claim 2, characterized in that: The vertical distance from the center point of the mounting hole of the support foot to the central axis of the rotation positioning shaft is equal to the distance from the center point of the center hole to the center point of the through hole of the multi-strand cable anchor.

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