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Construction method for connecting straight thread sleeves of main reinforcements of underground diaphragm wall

The technology of straight thread sleeve and underground diaphragm wall is applied in the direction of thread cutting auxiliary equipment, manufacturing tools, wire processing, etc., which can solve the problems of low technical level of construction personnel, poor control of construction process, and reduced quality of sleeve connection. Achieve the effect of improving joint processing quality, improving construction productivity efficiency, and avoiding electric welding operations

Active Publication Date: 2022-05-13
NO 1 ENG CO LTD OF CHINA RAILWAY 22ND CONSTR BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to factors such as the processing deviation of the steel bar, the size deviation of the sleeve, the poor control of the construction process, and the low technical level of the construction personnel, problems of varying degrees occurred, resulting in a decrease in the quality of the sleeve connection.

Method used

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  • Construction method for connecting straight thread sleeves of main reinforcements of underground diaphragm wall

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Effect test

Embodiment 1

[0045] see figure 1 , a construction method for the straight thread sleeve connection of the main reinforcement of the underground diaphragm wall, comprising the following steps

[0046] Step 1. Rebar blanking. According to the construction requirements, select and use the corresponding specifications of the rebar, and cut the rebar into the corresponding length according to the required length;

[0047] Step 2, steel wire turning, using a wire wheel to process the two ends of the steel bar to be processed;

[0048] Step 3: Inspection of the steel bar head, check the appearance of the steel bar, the length of the wire head and the thread diameter;

[0049] Step 4: The steel bar joint is installed, using a straight threaded sleeve to connect the wire heads of the two steel bars.

[0050] In the embodiment of the present invention, in the first step, check the steel bars for blanking in advance, and straighten the bent ones to avoid affecting the quality of the incision. The s...

Embodiment 2

[0077] A construction method for connecting the main reinforcement of the underground diaphragm wall with a straight thread sleeve, a main project of the PZH-2 standard three work area of ​​the Pearl River Delta intercity rail Pazhou branch line in Guangdong Province as an example, the full length of the PZH-2 standard three work area of ​​the Pearl River Delta intercity Pazhou branch line 4.047km, the line crosses Mingjing Village, Yuexi Village, Tanshan Village, and Jiaotang Village in Panyu District, Guangzhou City. The main project includes 1 vertical shaft, 3 evacuation shafts, 5897.36m shield tunnel (2640m on the left line, 3257.36m on the right line), 1280m open cut tunnel (850m on the left line, 430m on the right line), and 246.8m (51.39m+ 195.41m), and one continuous rigid frame bridge (93.2m). Among them, the open-cut tunnels are all constructed by open-cut method, and the foundation pit enclosure mainly adopts the structural form of underground diaphragm wall plus r...

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Abstract

The invention discloses a construction method for underground diaphragm wall main reinforcement straight thread sleeve connection. The construction method comprises the steps of steel bar blanking, steel bar threading, steel bar wire head inspection and steel bar connector installation. The method has the beneficial effects that the axis of the main reinforcement joint can be ensured to be vertical, and the common problems of off-axis, welding seam quality, slag inclusion, burning loss and the like are avoided; the mode of centralized machining in a reinforcing steel bar machining field can be adopted, the construction productivity efficiency can be effectively improved while the joint machining quality is improved, and the situation of shutdown and material waiting on a construction site is avoided; the time for connecting the steel cage is shortened, and the investment of labor cost is reduced; the steel bar joint is prevented from hooking the groove wall, and the possibility that the steel bar damages the slurry retaining wall in the groove is reduced; the electric welding operation of joint connection when the underground diaphragm wall reinforcement cage is hoisted is avoided, and the possibility of being damaged by electric shock is avoided; the cost of the main ribs connected by the straight thread sleeve can be reduced by about 20% compared with that of the main ribs connected by welding lap joint.

Description

technical field [0001] The invention relates to a method for connecting main reinforcement straight thread sleeves, in particular to a construction method for connecting main reinforcement straight thread sleeves of underground diaphragm walls, and belongs to the technical field of underground diaphragm wall construction. Background technique [0002] Combined with the extensive application of the underground diaphragm wall enclosure of open-cut tunnels in recent years, which has the characteristics of a large number of projects and a short construction period, the main reinforcement of the ground diaphragm wall is connected by a straight thread sleeve connection. Since the connection quality of steel bars directly affects the physical quality of the project and affects the safety of construction personnel during the lifting process, the connection quality of steel bars is very important. [0003] With the emergence of straight thread sleeve connection technology, it has eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F27/08B21F1/02B21F11/00B23P23/06B23G3/00B25B13/06
CPCB21F27/08B21F1/026B21F11/00B23P23/06B23G3/00B25B13/06Y02E10/20
Inventor 汪良韩震刘自明柴汉卿郭建波刘畅许青松江龙李本辉杨泽宇高延伟孙杰
Owner NO 1 ENG CO LTD OF CHINA RAILWAY 22ND CONSTR BUREAU
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