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Pre-stress applying device for steel pipe inner support of deep foundation pit

A technology of applying devices and prestressing, applied in infrastructure engineering, excavation, construction, etc., can solve the problems of large material consumption, non-adjustable, cumbersome process, etc., and achieve the effect of less material consumption, easy dismantling, and easy manufacturing

Active Publication Date: 2018-02-16
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of installing the prestressing device on the construction site is cumbersome and can only be welded on site. The precision is low, and it cannot be adjusted after one-time installation. It is difficult to disassemble, consumes a lot of materials, and costs a lot.

Method used

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  • Pre-stress applying device for steel pipe inner support of deep foundation pit
  • Pre-stress applying device for steel pipe inner support of deep foundation pit
  • Pre-stress applying device for steel pipe inner support of deep foundation pit

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with embodiment.

[0017] A deep foundation pit steel pipe internal support prestressing device of the present invention is characterized in that the device includes a steel pipe 1, a sleeve 2, an annular steel plate 3, a bolt 4, a flange 7, and a steel trim plate 8, and the steel pipe 1 The inner ring of one end is welded to the sleeve 2, and the other end is connected to the flange 7; the annular steel plate 3 is welded to the steel pipe 1 and the sleeve 2; the annular steel plate 3 is welded to the outer wall of the steel pipe 1 with ribs 11; U-shaped sleeve 6 is welded on 8; ribs 11 are welded on the outer wall of the steel plate 8 and U-shaped sleeve 6; the ribs 11 are drilled with fixing holes 9; The bolts 4 are connected; the bolts 4 are welded with a cross nut 5; the cross nut 5 is drilled with a fixing hole 9; the fixing hole 9 is connected through a steel wire rope 10.

[0018] The steel tri...

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PUM

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Abstract

The invention discloses a pre-stress applying device for a steel pipe inner support of a deep foundation pit. Compared with the mode of steel material welding reinforcement, the design of a bolt sleeve type support device has the advantages that axial stress is more uniform, and the bolt sleeve type support device is detachable and convenient to assemble and transport. Through the group arrangement of inserting bolt type support rods into sleeves, pre-stress can be gradually applied to a design value by using jacks at different time points for multiple times. Corresponding steel pipes are usedaccording to different support force requirements, the diameters and length of bolts, the number of the sleeves, the number of ribs and the like are made through calculation, and designed pre-stressconstruction requirements can be met when corresponding torque is used. The device is high in practicability, safe and reliable, simple in construction, easy to mount, easy to disassemble, high in efficiency and low in material consumption.

Description

technical field [0001] The invention relates to a device for applying prestress to steel pipe enclosures of deep foundation pits in building construction, and belongs to the technical field of building construction, in particular to a device for applying prestress to internal support of steel pipes in deep foundation pits. Background technique [0002] At present, the deep foundation pit construction of buildings in my country generally adopts the method of foundation pit enclosure and internal support, and the internal support usually adopts concrete support or steel pipe support. Steel pipe supports usually apply prestress to the foundation pit enclosure to offset the displacement of the surrounding soil after part of the foundation pit excavation. The steel pipe support is transported to the construction site in sections, and the sections are usually connected by flanges. [0003] The prestressing device is usually fixed with wedges or pads, and the prestress is applied ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/04
CPCE02D17/02E02D17/04E02D2250/0046
Inventor 王恒张晓波
Owner CHINA MCC17 GRP
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