Rapid installation device and installation method for deep foundation pit steel support

Abstract

The invention relates to the technical field of deep foundation pit construction, in particular to a deep foundation pit steel support rapid installation device and method. According to the mounting device and the mounting method, rapid construction of the steel support can be achieved, the lifting ropes on the two sides are used for supporting the steel support, the traction motor drives the movable support to move on the steel enclosing purlin, then the steel support can be driven to move to the longitudinal corresponding position of the mounting position, and then the driving motors on the two sides are controlled to rotate; the lifting ropes on the two sides are controlled to synchronously ascend and descend, the lifting ropes drive the steel support to synchronously ascend and descend, and the steel support is moved to the installation position; after one steel support is installed, the movable support is reset through the traction motor, and the next steel support can be moved again until all the steel supports are installed; by arranging the gap bridge support, the movable supports on the two sides and the driving motor are prevented from toppling towards the middle, and particularly when the steel support is conveyed, the situation that the movable supports are driven by the weight of the steel support to topple towards the middle is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of deep foundation pit construction, and in particular to a deep foundation pit steel support rapid installation device and an installation method. Background Art

[0002] In the process of open-cut construction of existing tunnels, pipe galleries, subways, and large underground spaces, in order to prevent the collapse of the deep foundation pit slope, the deep foundation pit is supported by the method of applying prestress with the crown beam + steel purlin system. In the process of installing steel supports in such projects, it is necessary to constantly adjust the position of the crane according to the installation position, and place the steel supports one by one in the corresponding position, which seriously reduces the construction efficiency; due to the limitation of site space, there is a situation where the crane cannot stand during the steel support hoisting process, and the use of large machinery at the edge of the deep foundation pit is extremely dangerous, which can easily cause the deep foundation pit slope to collapse; and during the hoisting process, there is a risk of collision between the crown beam at the top of the deep foundation pit and the steel support, which can easily cause damage to the steel support structure. In order to prevent the steel support from being damaged during the hoisting process, multiple people are required to assist in the hoisting, which further reduces the construction efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is the low efficiency and high risk factor of deep foundation pit steel support installation.

[0004] In order to solve the above problems, the present invention provides an installation device and an installation method which can improve installation efficiency and increase installation safety.

[0005] The first technical solution of the present invention is: a deep foundation pit steel support rapid installation device, which is applied to the uppermost steel purlin fixed on the retaining piles on both sides of the deep foundation pit, and movable brackets are respectively arranged on the uppermost steel purlins on both sides, and a bridge support is arranged between the movable brackets on both sides, and two driving motors are respectively arranged on each movable bracket, and a steel wire rope is wound on the rotating shaft of each driving motor, and the winding directions of the two steel wire ropes on the same side are opposite, and a suspension rope is connected between the free ends of the two steel wire ropes on the same side, and the suspension ropes on both sides are used to support the two ends of the same steel support; traction motors are arranged on both ends of the steel purlins on both sides, and a traction rope is wound on the rotating shaft of each traction motor, and the front ends of the two traction ropes on the same side are respectively connected to the two ends of the movable bracket on the same side.

[0006] Preferably, a further technical solution of the present invention is: The movable bracket comprises a fixed frame and a roller rotatably arranged at the bottom of the fixed frame, the width of the roller is smaller than the width of the upper surface of the steel purlin, and the roller rolls on the upper surface of the steel purlin. The above structure facilitates the fixed frame to roll on the steel purlin.

[0007] The distance between the two drive motors on the same side is greater than the diameter of the steel support to be supported. Through the above structure, when the steel support is lowered, the steel support does not contact the two drive motors and can fall onto the suspension rope.

[0008] The bridge support comprises two transverse support rods and a plurality of longitudinal support rods. The two ends of the two transverse support rods are respectively pinned to the movable brackets on both sides, and the plurality of longitudinal support rods are equidistantly fixed between the two transverse support rods.

[0009] The free end of the steel wire rope is provided with a hook, and the two ends of the suspension rope are provided with suspension rings, and the two steel wire rope hooks on the same side are hooked and connected with the two suspension rings of the suspension rope on the same side. Through the above structure, it is convenient to quickly disassemble and assemble the steel wire rope and the suspension rope.

[0010] The second technical solution of the present invention is: a method for quickly installing deep foundation pit steel supports, comprising the following steps: Step 1: Fix the retaining piles on both sides of the deep foundation pit, and fix the multi-layer steel purlins on the retaining piles. The horizontal positions of the steel purlins on both sides correspond to each other. Traction motors are respectively set at both ends of the top steel purlin. The traction rope is wound on the rotating shaft of the traction motor. Mobile brackets are respectively placed on the top steel purlins on both sides. Two driving motors are respectively installed on each mobile bracket. Steel wire ropes are wound on each driving motor. The two steel wire ropes on the same side are wound in opposite directions. A suspension rope is connected between the free ends of the two steel wire ropes on the same side. The free ends of the traction ropes at both ends of the steel purlin on the same side are connected to the two ends of the mobile bracket on the same side. Step 2: Control the two traction motors at one end of the deep foundation pit to start, and use the traction motors to drive the traction ropes to wind, so as to pull the mobile bracket to one end of the deep foundation pit where the operator can lower the steel support conveniently; Step 3: Lift the first steel support between the movable brackets on both sides, and then lower it so that both ends of the first steel support are supported by the suspension ropes on both sides; Step 4: Install the bridge support between the mobile brackets on both sides; Step 5: Turn on the two traction motors at the far end of the mobile bracket, pull the mobile bracket to move on the uppermost steel purlin through the traction rope, drive the first steel support to move, until it moves to the longitudinal corresponding position of the installation position of the first steel support, and control the traction motor to stop; Step 6: Control the four drive motors on both sides to start at the same time, and control the rotation directions of the drive motors on both sides to be opposite, and control the rotation directions of the two drive motors on the same side to be consistent, so that the suspension ropes on both sides are synchronously lowered to drive the first steel support to descend until the first steel support moves to the installation position; Step 7: Apply prestress to both ends of the first steel support so that both ends of the first steel support are fixed on the steel purlin at the installation position, and then fix the inclined steel wire rope between the two ends of the steel support and the retaining piles above the steel support to increase the stability of the two ends of the steel support by the inclined steel wire rope; Step 8, untie the connection between one of the steel wire ropes and the suspension rope, and control the driving motors on both sides to rotate in the opposite direction to the rotation direction of step 5, so as to drive the steel wire rope to be gradually wound around the rotating shaft of the driving motor; then repeat step 2, and reconnect the suspension rope with one of the steel wire ropes; Step 9. Remove the bridge support and repeat steps 3 to 8 to install the remaining steel supports until all steel supports are installed.

[0011] Compared with the prior art, the present invention using the above-mentioned technical solution 1 and technical solution 2 has the following beneficial effects: The installation device and installation method of the present invention can realize the rapid construction of steel supports. The steel supports are lifted up by the lifting ropes on both sides, and the movable bracket is driven by the traction motor to move on the steel purlin, so that the steel supports can be driven to move to the longitudinal corresponding position of the installation position, and then the rotation of the driving motors on both sides is controlled to control the synchronous lifting and lowering of the lifting ropes on both sides, so that the lifting ropes drive the steel supports to be lifted and lowered synchronously, and the steel supports are moved to the installation position; after installing one steel support, the movable bracket is reset by the traction motor, and the next steel support can be moved again until all steel supports are installed; by setting the bridge support, the movable brackets and the driving motors on both sides are prevented from tipping toward the middle, especially when the steel supports are transported, so that the movable brackets can be prevented from tipping toward the middle due to the weight of the steel supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the structure of a mobile bracket according to the first embodiment of the present invention; Figure 2 This is a flow chart of step 3 of embodiment 2 of the present invention; Figure 3 is a flowchart of step five of embodiment 2 of the present invention; Figure 4 is a partial side view of the mobile bracket of the second embodiment of the present invention when moving on the steel purlin; Figure 5 It is a partial side view of the steel support of the second embodiment of the present invention when it is fixed to the steel surrounding purlin.

[0013] In the figure: 10, crown beam; 11, driving motor; 12, hook; 13, lifting rope; 14, first handle; 15, second handle; 16, bridge buckle; 17, inclined wire rope; 2, fixed frame; 3, roller; 41, horizontal support rod; 42, longitudinal support rod; 5, traction motor; 6, guard pile; 7, triangular support; 8, steel purlin; 9, steel support. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0015] See attached Figure 1-5 , Embodiment 1 of the present invention discloses a quick installation device for a deep foundation pit steel support 9, which is applied to the uppermost steel purlin 8 fixed on both sides of the deep foundation pit, and movable brackets are respectively arranged on the uppermost steel purlin 8 on both sides, and the movable brackets move on the steel purlin 8, and a bridge support is arranged between the movable brackets on both sides, and two driving motors 11 are respectively arranged on each movable bracket, and the axial direction of the rotating shaft of the two driving motors 11 is perpendicular to the length direction of the steel purlin 8, and a steel wire rope is wound on the rotating shaft of each driving motor 11, and the winding directions of the two steel wire ropes on the same side are opposite, and a suspension rope 13 is connected between the free ends of the two steel wire ropes on the same side, and the suspension ropes 13 on both sides are used to support the two ends of the same steel support 9; traction motors 5 are arranged on both ends of the steel purlins 8 on both sides, and a traction rope is wound on the rotating shaft of each traction motor 5, and the front ends of the two traction ropes on the same side are respectively connected to the two ends of the movable bracket on the same side.

[0016] In this embodiment, the mobile bracket includes a fixed frame 2 and a roller 3 rotatably arranged at the bottom of the fixed frame 2, and both ends of the fixed frame 2 are provided with a U-shaped first handle 14 and a second handle 15, and the first handle 14 and the second handle 15 are provided with a pull ring for connecting a traction rope, and the width of the roller 3 is smaller than the width of the upper surface of the steel purlin 8, so that the roller 3 rolls on the upper surface of the steel purlin 8. Through the above structure, it is convenient for the fixed frame 2 to roll on the steel purlin 8.

[0017] In this embodiment, the distance between the two drive motors 11 on the same side is greater than the diameter of the steel support 9 to be supported. Through the above structure, when the steel support 9 is lowered, the steel support 9 does not contact the two drive motors 11 and can fall on the suspension rope 13.

[0018] In this embodiment, bridge buckles 16 are fixed to both ends of the inner side of the fixed frame 2. The bridge support includes two transverse support rods 41 and a plurality of longitudinal support rods 42. The two ends of the two transverse support rods 41 are pinned to the bridge buckles 16 of the movable brackets on both sides, and the plurality of longitudinal support rods 42 are equidistantly fixed between the two transverse support rods 41 to increase the bending resistance of the two transverse support rods 41.

[0019] In this embodiment, the free end of the steel wire rope is provided with a hook 12, and both ends of the suspension rope 13 are provided with suspension rings, and the two steel wire rope hooks 12 on the same side are hooked and connected with the two suspension rings of the suspension rope 13 on the same side. Through the above structure, the steel wire rope and the suspension rope 13 can be quickly disassembled and assembled.

[0020] See attached Figure 1-5 The second embodiment of the present invention discloses a method for quickly installing a deep foundation pit steel support 9, comprising the following steps: Step 1, two rows of retaining piles 6 are fixedly inserted on both sides of the deep foundation pit, crown beams 10 are fixed on the top of the retaining piles 6, and multiple layers of steel purlins 8 are fixed on the inner sides of the retaining piles 6 on both sides. Multiple triangular supports 7 are fixed below the steel purlins 8, and the steel purlins 8 are supported by the triangular supports 7. The heights of the layers of steel purlins 8 on both sides correspond to each other, and traction motors 5 are respectively arranged at both ends of the uppermost steel purlins 8 on both sides. The axial direction of the rotating shaft of the traction motor 5 is perpendicular to the length direction of the steel purlins 8, and a traction rope is wound on the rotating shaft of the traction motor 5. Mobile brackets are respectively placed on the uppermost steel purlins 8 on both sides, and two driving motors 11 are respectively installed on each mobile bracket. Steel wire ropes are wound around each driving motor 11, and the two steel wire ropes on the same side are wound in opposite directions. A suspension rope 13 is connected between the free ends of the two steel wire ropes on the same side, and the free ends of the traction ropes at both ends of the steel purlins 8 on the same side are connected to the first handle 14 and the second handle 15 at both ends of the mobile bracket on the same side; Step 2: Control the two traction motors 5 at one end of the deep foundation pit to start, and use the traction motors 5 to drive the traction rope to wind, so as to pull the mobile bracket to one end of the deep foundation pit where the operator can lower the steel support 9; Step 3: lift the first steel support 9, move it to the top between the movable brackets on both sides, and then slowly lower it, and support the two ends of the first steel support 9 through the suspension ropes 13 on both sides; Step 4: Install the bridge support between the mobile brackets on both sides, and fix the two ends of the bridge support to the mobile brackets with pins; Step 5: Turn on the two traction motors 5 at the far end of the mobile bracket, and pull the mobile bracket to move on the uppermost steel purlin 8 through the traction rope, thereby driving the first steel support 9 to move until it moves to the longitudinal corresponding position of the installation position of the first steel support 9, and control the traction motor 5 to stop; Step 6: Control the four drive motors 11 on both sides to start at the same time, and control the drive motors 11 on both sides to rotate in opposite directions, and control the rotation directions of the two drive motors 11 on the same side to be consistent, so as to drive the suspension ropes 13 on both sides to descend synchronously, and drive the first steel support 9 to descend until the first steel support 9 moves to the installation position; Step 7: Apply prestress at both ends of the first steel support 9, so that both ends of the first steel support 9 are fixed on the steel purlin 8 at the installation position, and then fix the inclined steel wire rope 17 between the two ends of the steel support 9 and the retaining pile 6 above the steel support 9, and increase the stability of the two ends of the steel support 9 by the inclined steel wire rope 17; Step 8, untie the connection between one of the steel wire ropes and the suspension rope 13, and control the driving motors 11 on both sides to rotate in the opposite direction to the rotation direction of step 5, so as to drive the steel wire rope to be gradually wound around the rotating shaft of the driving motor 11; then repeat step 2, and reconnect the suspension rope 13 with one of the steel wire ropes; Step 9: Remove the bridge support and repeat the operations from step 3 to step 8 to install the remaining steel supports 9 until all the steel supports 9 are installed.

[0021] The installation device and installation method of the present invention can realize the rapid construction of the steel support 9. The steel support 9 is lifted up by the lifting ropes 13 on both sides, and the movable bracket is driven to move on the steel purlin 8 by the traction motor 5, so that the steel support 9 can be driven to move to the longitudinal corresponding position of the installation position, and then the rotation of the driving motors 11 on both sides is controlled to control the synchronous lifting and lowering of the lifting ropes 13 on both sides, so that the lifting ropes 13 drive the steel support 9 to rise and fall synchronously, and the steel support 9 is moved to the installation position; after installing one steel support 9, the movable bracket is reset by the traction motor 5, and the next steel support 9 can be moved again until all steel supports 9 are installed; by setting the bridge support, the movable brackets and the driving motors 11 on both sides are prevented from tipping toward the middle, especially when the steel support 9 is transported, so as to prevent the movable bracket from tipping toward the middle due to the weight of the steel support 9.

[0022] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A deep foundation pit steel support quick installation device, applied to the uppermost steel purlin fixed on the retaining piles on both sides of the deep foundation pit, characterized in that: Mobile brackets are respectively arranged on the uppermost steel purlins on both sides, and bridge supports are arranged between the mobile brackets on both sides. Two driving motors are respectively arranged on each mobile bracket, and a steel wire rope is wound around the rotating shaft of each driving motor. The winding directions of the two steel wire ropes on the same side are opposite, and a suspension rope is connected between the free ends of the two steel wire ropes on the same side. The suspension ropes on both sides are used to support the two ends of the same steel support; traction motors are arranged at both ends of the steel purlins on both sides, and a traction rope is wound around the rotating shaft of each traction motor, and the front ends of the two traction ropes on the same side are respectively connected to the two ends of the mobile bracket on the same side.

2. The deep foundation pit steel support quick installation device according to claim 1 is characterized by: The movable bracket comprises a fixed frame and a roller rotatably arranged at the bottom of the fixed frame, the width of the roller is smaller than the width of the upper surface of the steel purlin, and the roller rolls on the upper surface of the steel purlin.

3. The deep foundation pit steel support quick installation device according to claim 1 is characterized by: The distance between the two driving motors on the same side is greater than the diameter of the steel support to be supported.

4. The deep foundation pit steel support rapid installation device according to claim 1 is characterized by: The bridge support comprises two transverse support rods and a plurality of longitudinal support rods. The two ends of the two transverse support rods are respectively pinned to the movable brackets on both sides, and the plurality of longitudinal support rods are equidistantly fixed between the two transverse support rods.

5. The deep foundation pit steel support rapid installation device according to claim 1 is characterized by: The free end of the steel wire rope is provided with a hook, and both ends of the suspension rope are provided with suspension rings, and the two steel wire rope hooks on the same side are hooked and connected with the two suspension rings of the suspension rope on the same side.

6. A method for rapid installation of deep foundation pit steel supports, characterized in that: The following steps are involved: Step 1: Fix retaining piles on both sides of the deep foundation pit, fix multi-layer steel purlins on the retaining piles, the horizontal positions of the steel purlins on both sides correspond, traction motors are respectively arranged at both ends of the uppermost steel purlin, traction ropes are wound around the rotating shafts of the traction motors, mobile brackets are respectively placed on the uppermost steel purlins on both sides, two driving motors are respectively installed on each mobile bracket, steel wire ropes are wound around each driving motor, the two steel wire ropes on the same side are wound in opposite directions, a suspension rope is connected between the free ends of the two steel wire ropes on the same side, and the free ends of the traction ropes at both ends of the steel purlin on the same side are connected to the two ends of the mobile bracket on the same side; Step 2: Control the two traction motors at one end of the deep foundation pit to start, and use the traction motors to drive the traction ropes to wind, so as to pull the mobile bracket to one end of the deep foundation pit where the operator can lower the steel support conveniently; Step 3: Lift the first steel support between the movable brackets on both sides, and then lower it so that both ends of the first steel support are supported by the suspension ropes on both sides; Step 4: Install the bridge support between the mobile brackets on both sides; Step 5: Turn on the two traction motors at the far end of the mobile bracket, pull the mobile bracket to move on the uppermost steel purlin through the traction rope, drive the first steel support to move, until it moves to the longitudinal corresponding position of the installation position of the first steel support, and control the traction motor to stop; Step 6: Control the four drive motors on both sides to start at the same time, and control the rotation directions of the drive motors on both sides to be opposite, and control the rotation directions of the two drive motors on the same side to be consistent, so that the suspension ropes on both sides are synchronously lowered to drive the first steel support to descend until the first steel support moves to the installation position; Step 7: Apply prestress to both ends of the first steel support so that both ends of the first steel support are fixed on the steel purlin at the installation position, and then fix the inclined steel wire rope between the two ends of the steel support and the guard pile above the steel support; Step 8, untie the connection between one of the steel wire ropes and the suspension rope, and control the driving motors on both sides to rotate in the opposite direction to the rotation direction of step 5, so as to drive the steel wire rope to be gradually wound around the rotating shaft of the driving motor; then repeat step 2, and reconnect the suspension rope with one of the steel wire ropes; Step 9. Remove the bridge support and repeat steps 3 to 8 to install the remaining steel supports until all steel supports are installed.

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