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

Abstract

The present application relates to the technical field of deep foundation pit construction, in particular to a deep foundation pit steel support rapid installation device and installation method. The installation device and installation method can realize rapid construction of the steel support, the steel support is lifted by the two sides of the lifting ropes, and the moving support is moved on the steel enclosing purlin by the traction motor, so that the steel support is moved to the longitudinal corresponding position of the installation position, then the two sides of the driving motor are controlled to rotate, the two sides of the lifting ropes are controlled to ascend and descend synchronously, the lifting ropes drive the steel support to ascend and descend synchronously, and the steel support is moved to the installation position; after one steel support is installed, the moving support is reset by the traction motor, the next steel support can be moved again, and all the steel supports are installed until the installation is completed; the bridge support is arranged, the moving supports and the driving motors on the two sides are prevented from tilting to the middle, and especially when the steel support is transported, the moving support is prevented from tilting to the middle due to the weight of the steel support.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep foundation pit construction, in particular to a deep foundation pit steel support rapid installation device and installation method. BACKGROUND

[0002] In the process of open excavation construction of tunnels, pipe corridors, subways and large underground spaces, in order to prevent deep foundation pit slope collapse, the crown beam + steel enclose purlin system is used to apply prestress to support the deep foundation pit. In the process of installing steel support, the position of the crane needs to be adjusted constantly according to the installation position, and the steel support is placed on the corresponding position one by one, which seriously reduces the construction efficiency. Due to the limitation of site space, the crane cannot be positioned during the hoisting of the steel support, which is extremely dangerous to use large machinery on the deep foundation pit side, and is easy to cause the collapse of the deep foundation pit slope. 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 is easy to cause damage to the steel support structure. In order to prevent the steel support from being damaged during hoisting, multiple people are needed to assist in hoisting, which further reduces the construction efficiency. SUMMARY

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

[0004] To solve the problem, the present application provides an installation device and installation method that can improve installation efficiency and increase installation safety.

[0005] The technical scheme one of the present application is: a deep foundation pit steel support rapid installation device is applied to the uppermost layer of steel enclose purlin fixed on the deep foundation pit retaining piles on both sides, the uppermost layer of steel enclose purlin on both sides is respectively provided with a movable support, a bridge support is arranged between the movable supports on both sides, two drive motors are respectively arranged on each movable support, a steel wire rope is wound on the rotating shaft of each drive motor, the winding directions of the two steel wire ropes on the same side are opposite, a lifting rope is connected between the free ends of the two steel wire ropes on the same side, and the lifting 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 enclose purlin on both sides, traction ropes are wound on the rotating shafts of the traction motors, and the front ends of the two traction ropes on the same side are connected to the two ends of the movable support on the same side.

[0006] As a preferred, the further technical scheme of the present application is:

[0007] The movable support includes a fixed frame and a roller rotatably arranged at the bottom of the fixed frame, the width of the roller is less than the width of the upper surface of the steel enclose purlin, and the roller rolls on the upper surface of the steel enclose purlin. Through the above structure, the fixed frame can roll on the steel enclose purlin.

[0008] The distance between the two driving 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 driving motors, and can fall on the lifting rope.

[0009] The bridge support includes 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 two mobile supports on the two sides, and the plurality of longitudinal support rods are fixed equidistantly between the two transverse support rods.

[0010] The free end of the steel wire rope is provided with a hook, the two ends of the lifting rope are provided with lifting rings, and the hooks of the two steel wire ropes on the same side are hooked and connected with the two lifting rings of the lifting rope on the same side. Through the above structure, the steel wire rope and the lifting rope can be quickly disassembled.

[0011] The technical scheme two of the present application is a deep foundation pit steel support rapid installation method, comprising the following steps:

[0012] Step one, fixing the support pile on both sides of the deep foundation pit, fixing the multi-layer steel surrounding purlin on the support pile, the horizontal positions of the steel surrounding purlins on both sides correspond, the two ends of the uppermost layer of steel surrounding purlin are respectively provided with traction motors, the traction ropes are wound on the rotating shafts of the traction motors, the mobile supports are placed on the uppermost layer of steel surrounding purlin on both sides, the two driving motors are installed on each mobile support, the steel wire ropes are wound on each driving motor, the two steel wire ropes on the same side are reversely wound, the lifting 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 the two ends of the steel surrounding purlin on the same side are connected to the two ends of the mobile support on the same side.

[0013] Step two, control the two traction motors at one end of the deep foundation pit to start, drive the traction rope to wind, and pull the mobile support to one end of the deep foundation pit where the operator can easily lower the steel support.

[0014] Step three, lift the first steel support between the mobile supports on both sides, then lower it, and make the two ends of the first steel support supported by the lifting ropes on both sides.

[0015] Step four, install the bridge support between the mobile supports on both sides.

[0016] Step five, start the two traction motors at the far end of the mobile support, pull the mobile support to move on the uppermost layer of steel surrounding purlin, drive the first steel support to move, until the first steel support moves to the longitudinal corresponding position of the installation position, and control the traction motor to stop.

[0017] Step six, control the four driving motors on both sides to start at the same time, control the rotating directions of the driving motors on both sides to be opposite, control the rotating directions of the two driving motors on the same side to be consistent, and control the lifting ropes on both sides to descend synchronously, drive the first steel support to descend, until the first steel support moves to the installation position.

[0018] Step seven, prestress is applied to both ends of the first steel support, so that both ends of the first steel support are fixed on the steel encloses purlin in the installation position, and then the cable is fixed between both ends of the steel support and the enclosure pile above the steel support, so that the stability of both ends of the steel support is increased through the cable;

[0019] Step eight, the connection between the steel wire rope and the lifting rope is disconnected, and the driving motors on both sides are controlled to rotate in the reverse direction of the rotating direction in step five, so that the steel wire rope is gradually wound on the rotating shaft of the driving motor; then step two is repeated, and the lifting rope is connected with the steel wire rope again;

[0020] Step nine, the overpass support is removed, and the operations of steps three to eight are repeated to install the remaining steel supports until all the steel supports are installed.

[0021] Compared with the prior art, the beneficial effects of the above technical solutions one and two are:

[0022] The installation device and the installation method can realize rapid construction of the steel support, the steel support is lifted by the lifting ropes on both sides, the moving support is moved on the steel encloses purlin by the traction motor, the steel support is moved to the corresponding position in the longitudinal direction of the installation position, the driving motors on both sides are controlled to rotate, the lifting ropes on both sides are controlled to ascend and descend synchronously, the steel support is moved to the installation position by the lifting ropes; after one steel support is installed, the moving support is reset by the traction motor, the next steel support can be moved again until all the steel supports are installed; the overpass support is arranged to prevent the moving supports and the driving motors on both sides from tilting to the middle, especially when the steel support is transported, the moving support is prevented from tilting to the middle due to the weight of the steel support. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a moving support structure schematic diagram of embodiment one of the present application;

[0024] Figure 2 is a step three flowchart schematic diagram of embodiment two of the present application;

[0025] Figure 3 is a step five flowchart schematic diagram of embodiment two of the present application;

[0026] Figure 4 is a partial side view of the moving support of embodiment two of the present application when the moving support moves on the steel encloses purlin;

[0027] Figure 5 is a partial side view of the steel support of embodiment two of the present application when the steel support is fixed on the steel encloses purlin.

[0028] In the figure: 10, the crown beam; 11, the driving motor; 12, the lifting hook; 13, the lifting rope; 14, the first handle; 15, the second handle; 16, the over-bridge buckle; 17, the inclined cable; 2, the fixed frame; 3, the roller; 41, the horizontal support rod; 42, the vertical support rod; 5, the traction motor; 6, the enclosure pile; 7, the triangular support; 8, the steel enclosing purlin; 9, the steel support. DETAILED DESCRIPTION

[0029] The present application is further illustrated by the following examples, which are intended to better illustrate the present application and are not intended to limit the scope of the present application.

[0030] Referring to the accompanying drawings Figures 1-5 , the embodiment one of the present application discloses a kind of steel support 9 fast installation device of deep foundation pit, it is applied to the uppermost layer steel enclosing purlin 8 of the fixed two sides of deep foundation pit, and the uppermost layer steel enclosing purlin 8 of two sides is respectively provided with mobile support, mobile support moves on steel enclosing purlin 8, over-bridge support is arranged between the mobile support of two sides, two driving motors 11 are respectively arranged on each mobile support, the axis direction of the rotating shaft of two driving motors 11 is perpendicular to the length direction of steel enclosing purlin 8, steel wire rope is wound on the rotating shaft of each driving motor 11, the winding direction of two steel wire ropes of same side is opposite, and lifting rope 13 is connected between the free end of two steel wire ropes of same side, and the lifting rope 13 of two sides is used to support the two ends of same steel support 9;Two ends of two sides steel enclosing purlin 8 are provided with traction motor 5, traction rope is wound on the rotating shaft of each traction motor 5, and the front end of two traction ropes of same side is connected to the two ends of mobile support of same side.

[0031] In the embodiment, the mobile support includes fixed frame 2 and roller 3 rotationally arranged at the bottom of fixed frame 2, the two ends of fixed frame 2 are provided with U-shaped first handle 14 and second handle 15, the first handle 14 and the second handle 15 are provided with a pull ring for connecting the traction rope, and the width of the roller 3 is less than the width of the upper surface of the steel enclosing purlin 8, so that the roller 3 rolls on the upper surface of the steel enclosing purlin 8. Through the above structure, the fixed frame 2 is facilitated to roll on the steel enclosing purlin 8.

[0032] In the embodiment, the distance between the two driving motors 11 of 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 driving motors 11 and can fall on the lifting rope 13.

[0033] In the embodiment, the inner two ends of the fixed frame 2 are fixed with over-bridge buckles 16, the over-bridge support includes two horizontal support rods 41 and a plurality of vertical support rods 42, the two ends of the two horizontal support rods 41 are respectively pinned to the over-bridge buckles 16 of the two mobile supports, and the plurality of vertical support rods 42 are fixed equidistantly between the two horizontal support rods 41 to increase the bending resistance of the two horizontal support rods 41.

[0034] In the embodiment, the free end of the steel wire rope is provided with a hook 12, both ends of the lifting rope 13 are provided with lifting rings, and the hooks of the two steel wire rope hooks on the same side are connected with the two lifting rings on the same side. Through the above structure, the steel wire rope and the lifting rope 13 can be quickly disassembled.

[0035] Referring to the drawings Figures 1-5 The second embodiment of the present application discloses a method for quickly installing a deep foundation pit steel support 9, comprising the following steps:

[0036] Step one, two rows of support piles 6 are fixedly inserted on both sides of the deep foundation pit, a crown beam 10 is fixed on the top of the support piles 6, a plurality of steel surrounding purlins 8 are fixed on the inner sides of the support piles 6 on both sides, a plurality of triangular braces 7 are fixed below the steel surrounding purlins 8, the steel surrounding purlins 8 are supported by the triangular braces 7, the heights of the steel surrounding purlins 8 on both sides correspond to each other, traction motors 5 are arranged at both ends of the uppermost layer of steel surrounding purlins 8 on both sides, the shaft axes of the traction motors 5 are perpendicular to the length directions of the steel surrounding purlins 8, traction ropes are wound on the shaft axes of the traction motors 5, mobile supports are placed on the uppermost layer of steel surrounding purlins 8 on both sides, two drive motors 11 are respectively arranged on each mobile support, steel wire ropes are wound on each drive motor 11, the two steel wire ropes on the same side are reversely wound, a lifting 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 surrounding purlins 8 on the same side are connected to first handles 14 and second handles 15 at both ends of the mobile supports on the same side;

[0037] Step two, the two traction motors 5 at one end of the deep foundation pit are controlled to be turned on, the traction ropes are driven by the traction motors 5 to be wound, and the mobile supports are pulled to one end of the deep foundation pit where the operators can conveniently lower the steel supports 9;

[0038] Step three, the first steel support 9 is lifted and moved above the mobile supports between the two sides, and then is slowly lowered, and the two ends of the first steel support 9 are supported by the lifting ropes 13 on both sides;

[0039] Step four, a bridging support is installed between the mobile supports on both sides, and the bridging support is fixedly connected to the mobile supports by pins;

[0040] Step five, the two traction motors 5 at the distal ends of the mobile supports are turned on, the mobile supports are moved on the uppermost layer of steel surrounding purlins 8 by the traction ropes, so as to drive the first steel support 9 to move, until the first steel support 9 moves to the longitudinal corresponding position of the installation position of the first steel support 9, and the traction motors 5 are controlled to stop;

[0041] Step six, the four drive motors 11 on both sides are controlled to be turned on at the same time, the drive motors 11 on both sides are controlled to be reversely rotated, the rotation directions of the two drive motors 11 on the same side are controlled to be consistent, the lifting ropes 13 on both sides are controlled to be synchronously lowered, the first steel support 9 is controlled to be lowered, and the first steel support 9 is moved to the installation position;

[0042] Step seven, prestress is applied to both ends of the first steel support 9, so that the first steel support 9 is fixed on the steel enclosing purlin 8 at the installation position, and then the cable-stayed steel wire rope 17 is fixed between the two ends of the steel support 9 and the enclosing pile 6 above the steel support 9, so as to increase the stability of the two ends of the steel support 9 through the cable-stayed steel wire rope 17;

[0043] Step eight, the connection between the steel wire rope and the lifting rope 13 is disconnected, and the driving motor 11 on both sides is controlled to rotate in the opposite direction to that of step five, so as to drive the steel wire rope to gradually wind on the rotating shaft of the driving motor 11; then step two is repeated, and the lifting rope 13 is connected with the steel wire rope again;

[0044] Step nine, the over-bridge support is removed, and the remaining steel supports 9 are installed by repeating the operations of steps three to eight until all the steel supports 9 are installed.

[0045] The installation device and the installation method of the present application can realize the rapid construction of the steel support 9. The steel support 9 is lifted by the lifting ropes 13 on both sides, and the moving bracket is moved on the steel enclosing purlin 8 by the traction motor 5, so that the steel support 9 is moved to the longitudinal corresponding position of the installation position, and then the driving motor 11 on both sides is controlled to rotate, so that the lifting ropes 13 on both sides are controlled to ascend and descend synchronously, so that the steel support 9 is moved to the installation position by the lifting ropes 13. After one steel support 9 is installed, the moving bracket is reset by the traction motor 5, so that the next steel support 9 can be moved again until all the steel supports 9 are installed. By setting the over-bridge support, the moving bracket and the driving motor 11 on both sides are prevented from tilting to the middle, especially when the steel support 9 is transported, the moving bracket is prevented from tilting to the middle due to the weight of the steel support 9.

[0046] The above only describes the preferred embodiments of the present application, and does not limit the scope of the present application. Any equivalent changes made according to the content of the specification and the drawings of the present application are included in the scope of the present application.

Claims

1. A method for fast installation of steel support for deep foundation pit, characterized in that, The method comprises the following steps: Step one, fixing the support piles on both sides of the deep foundation pit, fixing the multi-layer steel surrounding purlins on the support piles, the horizontal positions of the steel surrounding purlins on both sides correspond to each other, the two ends of the uppermost layer of the steel surrounding purlins are respectively provided with traction motors, the traction ropes are wound on the rotating shafts of the traction motors, the mobile supports are respectively placed on the uppermost layer of the steel surrounding purlins on both sides, two driving motors are respectively installed on each mobile support, the steel wires are wound on each driving motor, the two steel wires on the same side are reversely wound, and the hoisting ropes are connected between the free ends of the two steel wires on the same side; Step two, controlling the two traction motors on one end of the deep foundation pit to be turned on, driving the traction ropes to be wound by the traction motors, and pulling the mobile supports to one end of the deep foundation pit where the steel supports are conveniently lowered by the operating personnel; Step three, lifting the first steel support to between the mobile supports on both sides, and then lowering the first steel support, so that the two ends of the first steel support are supported by the hoisting ropes on both sides; Step four, installing the bridging support between the mobile supports on both sides; Step five, turning on the two traction motors at the far end of the mobile support, pulling the mobile support to move on the uppermost layer of the steel surrounding purlins by the traction ropes, driving the first steel support to move, until the first steel support moves to the longitudinal corresponding position of the installation position of the first steel support, and controlling the traction motor to stop; Step six, controlling the four driving motors on both sides to be turned on at the same time, controlling the rotating directions of the driving motors on both sides to be opposite, controlling the rotating directions of the two driving motors on the same side to be consistent, synchronously lowering the first steel support by the hoisting ropes on both sides, until the first steel support moves to the installation position; Step seven, applying the prestress to the two ends of the first steel support, fixing the two ends of the first steel support on the steel surrounding purlins at the installation position, and then fixing the cable steel wires between the two ends of the steel support and the support piles above the steel support; Step eight, disconnecting the connection between the steel wire and the hoisting rope, and controlling the driving motors on both sides to rotate in the reverse direction of the rotating direction in step five, driving the steel wire to be gradually wound on the rotating shaft of the driving motor; then repeating step two, and restoring the connection between the hoisting rope and the steel wire; Step nine, removing the bridging support, and repeating the operations in steps three to eight to install the remaining steel supports, until all the steel supports are installed.

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