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Late poured band type assembled pipe jacking working open caisson

A technology for working wells and pipe jacking, applied in artificial islands, water conservancy projects, infrastructure projects, etc., can solve the problems of traffic flow in the construction section, affect the normal life of residents, and long construction period, so as to reduce pollution and improve the normal life of residents The effect of reducing the construction period and facilitating transportation

Inactive Publication Date: 2011-08-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction period of the working well site is long, which will inevitably have a great impact on the traffic flow of the construction section
It also pollutes the surrounding environment and seriously affects the normal life of nearby residents.

Method used

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  • Late poured band type assembled pipe jacking working open caisson
  • Late poured band type assembled pipe jacking working open caisson
  • Late poured band type assembled pipe jacking working open caisson

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] The invention is a prefabricated and assembled rectangular pipe-jacking working well. The working well is divided into three sections vertically, and the length of each section is between 2m and 3m. Each prefabricated well slice is vertically connected by prestressed steel bars 11 . Finished rolled rebar is used as prestressed reinforcement. Each transverse section is composed of two U-shaped wells 4 (B prefabricated) and two inline wells 6 (A prefabricated). Among them, the U-shaped well slice 4 adopts the structure of adding axils 3 . The well slices are connected by the post-casting tape 2 in the transverse direction. The U-shaped well slice (short side direction) is the direction of pipe jacking. In order to increase the cohesion with the post-casting tape 2, the side of the prefabricated well sheet is designed in the form of concave and convex tooth grooves 10.

[0025] The prestressed steel bar 11 is located in the reserved channel 8 of the prefabricated well...

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Abstract

The invention discloses a bidirectional prestressing type preassembled working open caisson which is applied to pipe jacking projects. The open caisson is rectangular and is formed by splicing prefabricated well pieces with U-shaped and straight sections. Cantilever ends at two sides of each U-shaped well piece are different in length; the horizontal U-shaped well pieces are spliced dissymmetrically according to the lengths of the cantilever ends at two ends; and the vertical adjacent U-shaped well pieces are spliced in a staggered way according to the sizes of the cantilever ends. All the vertical well pieces and the horizontal well pieces are connected through prestressed reinforcements. The vertical prestressed reinforcements are connected through connectors at the transversal abutted seams. The vertical prestressed reinforcements in the well pieces of the blade foot section are subjected to non-bonding treatment. Shear key structures are arranged on the sections of prefabricated well pieces at two sides of transversal abutted seams; and the well pieces provided with the shear key structures adopt a matching prefabrication method to ensure the mounting precision of the open caisson. When in prefabrication, the reinforcements are inserted into a prestressing duct. The bidirectional prestressing type preassembled working open caisson disclosed by the invention remarkably improves the filed casting efficiency of the open caisson, shortens the pipe jacking construction period, and accords with the architectural notion of 'low carbon economy and green construction'.

Description

technical field [0001] The invention relates to a caisson working well used in pipe jacking engineering in municipal underground pipeline engineering, in particular to a post-cast belt-type assembled pipe jacking working well. Background technique [0002] Pipe jacking is a modern construction method for laying underground pipelines. Compared with the corresponding slotted buried pipe construction method and shield construction method, the pipe jacking construction has obvious advantages. This method does not need to excavate ground slots, but several working wells must be excavated at both ends of the laid underground pipeline. Working wells can be divided into jacking working wells and receiving wells. Among them, reinforced concrete circular or rectangular working wells are more common. Most of the municipal underground pipe network reconstruction projects using pipe jacking construction are located on the main roads of cities and towns. The current working caisson ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/12E02D29/16
Inventor 郭正兴段凯元刘家彬
Owner SOUTHEAST UNIV
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