Segmented reinforcement cage for ultra-deep diaphragm wall

Abstract

The utility model belongs to the field of subway construction, and particularly relates to an ultra-deep diaphragm wall sectional type reinforcement cage which comprises a plurality of sections of reinforcement cage bodies. Each section of reinforcement cage comprises a reinforcement cage main body and I-shaped steel arranged on the two sides of the reinforcement cage main body; the reinforcement cage main body comprises reinforcement cage main reinforcements and horizontal reinforcements connected with the reinforcement cage main reinforcements; the adjacent reinforcement cages are connected through guide steel bars. The construction thought of integrated machining and segmental hoisting is innovatively provided, firstly, the reinforcement cage is integrally bound and manufactured, then, the reinforcement cage is cut into segments, guide ribs are arranged at the joints for positioning, finally, segmental hoisting is conducted, and connection of the I-shaped steel and the main ribs is completed in sequence. The engineering problem that the success rate of traditional segmental hoisting butt joint is low is solved, and the effective utilization rate of reinforcement cage hoisting is increased.

Description

Technical Field

[0001] The utility model belongs to the field of subway construction, and in particular relates to an ultra-deep ground-connected wall segmented steel cage. Background Art

[0002] With the increase in subway lines and the deepening of stations, the ground-connected walls of the enclosure structure are getting deeper and deeper. The depth of the ground-connected wall exceeds 70m, accompanied by the growth of the steel cage, and the weight of the steel cage has increased significantly. The hoisting of the steel cage itself is a very dangerous project, and the overweight and overlong steel cage undoubtedly greatly increases the risk of hoisting operations: when hoisting the steel cage as a whole, the overall stiffness and stability must be considered. The hoisting operation must consider the construction efficiency to avoid taking too long to increase the instability of the slot wall. In order to achieve both safety, working space impact and economic benefits, effective measures must be taken to resolve the risks. Utility Model Content

[0003] The utility model aims to overcome the defects in the prior art and provide an ultra-deep ground-connected wall segmented steel cage.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A segmented steel cage for an ultra-deep ground-connected wall comprises a plurality of steel cage sections; each steel cage section comprises a steel cage body and I-beams arranged on both sides of the steel cage body; the steel cage body comprises main steel cage bars and horizontal bars connecting the main steel cage bars; adjacent steel cages are connected using guide steel bars.

[0006] The guide steel bars connect the I-beams of adjacent steel cages.

[0007] The main bars of adjacent steel cages are connected by threaded sleeves; the main bar connections of the steel cages are provided with steel bar threads.

[0008] The main reinforcement between adjacent steel cages is connected with staggered joints.

[0009] The threaded sleeve has a length of 35d and a thickness of not less than 500mm.

[0010] The guide steel is at least 1m long and 32mm in diameter.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] This patent aims to solve the problems of difficulty in overall hoisting and high precision requirements for segmented hoisting during the hoisting of the steel cage. It innovatively proposes the construction idea of ​​"integrated processing and segmented hoisting". The steel cage is first made by overall binding, then cut into segments and guide bars are set at the joints for positioning. Finally, the segments are hoisted to complete the connection of I-beams and main bars in sequence. It solves the engineering problem of low success rate of traditional segmented hoisting and docking, improves the effective utilization rate of steel cage hoisting, ensures efficient and rapid construction of ground-connected walls, reduces risks in the later construction process, provides faster and more accurate technical support for the later construction of the project, and ensures the safety of the later foundation pit construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the ultra-deep ground-connected wall segmented steel cage of the utility model;

[0014] Figure 2 Schematic diagram of the construction of the segmented steel cage of the ultra-deep ground-connected wall of the utility model, wherein (a) is a schematic diagram of the process; and (b) is a schematic diagram of the result. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment.

[0016] Figure 1-2 A segmented steel cage for an ultra-deep ground-connected wall is shown, comprising a plurality of steel cage sections; each steel cage section comprises a steel cage body 2 and an I-beam 1 arranged on both sides of the steel cage body; the steel cage body comprises a steel cage main bar 21 and horizontal bars 22 connecting the steel cage main bars; adjacent steel cages are connected using guide bars 3.

[0017] The guide steel bars 3 connect the I-beams of adjacent steel cages.

[0018] The main bars 21 of adjacent steel cages are connected by threaded sleeves; the main bars of the steel cages are connected by staggered seams.

[0019] The threaded sleeve has a length of 35d and a thickness of not less than 500mm.

[0020] The guide steel bar 3 is at least 1 meter long and 32 mm in diameter.

[0021] The construction process of the ultra-deep ground-connected wall segmented steel cage includes the following steps:

[0022] 1) Lift the lower segment steel cage upright in the air, lower it into the guide wall, and use a shoulder pole to pass through the pre-set steel plate to make the steel cage park steadily on the guide wall. Weld 3 guide steel bars on the left and right webs of the I-beam of the lower segment steel cage as butt joint slide rails. The guide steel bar is 1m long, 0.5m exposed at the joint, and 32mm in diameter. After welding the guide steel bars, prepare to lift the upper segment steel cage.

[0023] 2) Repeat the above steps to hoist the stage steel cage horizontally to about 30cm from the ground. After observing whether the steel cage is stable, the main crane lifts up, and the head of the steel cage is lifted up immediately. According to the distance between the tail of the steel cage and the ground, the auxiliary crane is commanded to cooperate in lifting. Then the two cranes are lifted together to the appropriate position above the lower segment steel cage, ready for docking.

[0024] 3) After the upper segment steel cage and the lower segment steel cage I-beam are accurately positioned by the guide steel bars, the upper and lower segment steel cage I-beams are welded and the guide bars are welded to the I-beam of the upper segment steel cage. Before docking, use the total station to check whether it is vertical to ensure the verticality of the docking.

[0025] 4) After the main reinforcement of the steel cage is tightened by the straight thread sleeve butt joint method, the horizontal reinforcement and the sealing reinforcement are welded, and the main reinforcement and horizontal reinforcement that are not in place are welded. The steel cage is lowered to the designed position as a whole. After the main reinforcement and the acoustic detection pipe are butt jointed, the steel cage is lifted as a whole, the shoulder pole is pulled out, and then the steel cage is lowered to the final position as a whole.

[0026] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An ultra-deep ground-connected wall segmented steel cage, characterized in that: It comprises a plurality of steel cage sections; each steel cage section comprises a steel cage body and I-beams arranged on both sides of the steel cage body; the steel cage body comprises main steel cage bars and horizontal bars connecting the main steel cage bars; adjacent steel cages are connected by guide steel bars.

2. The ultra-deep ground-connected wall segmented steel cage according to claim 1 is characterized in that: The guide steel bars connect the I-beams of adjacent steel cages.

3. The ultra-deep ground-connected wall segmented steel cage according to claim 1 is characterized in that: The main bars of adjacent steel cages are connected by threaded sleeves; the main bar connections of the steel cages are provided with steel bar threads.

4. The ultra-deep ground-connected wall segmented steel cage according to claim 3 is characterized in that: The main reinforcement between adjacent steel cages is connected with staggered joints.

5. The ultra-deep ground-connected wall segmented steel cage according to claim 3 is characterized in that: The threaded sleeve has a length of 35d and a thickness of not less than 500mm.

6. The ultra-deep ground-connected wall segmented steel cage according to claim 1 is characterized in that: The guide steel is at least 1m long and 32mm in diameter.

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