Controllable lifting underpinning tool

A controllable and underpinning technology, which is applied in basic structure engineering, building maintenance, and basic structure repair. , Simple and clear effect of force analysis

Inactive Publication Date: 2007-12-26
ENGINEERING RESEARCH INSTITUTE OF APPRAISAL AND STRENGTHENING SHANDONG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some projects, the technology of active underpinning is applied. For example, the Kyoto subway station in Japan adopts an active underpinning technology, which is characterized by high axial force (5850kN) of underpinning piles and displacement control within the target value. ; The domestic Shenzhen Metro Department Store Square pile foundation underpinning adopts active underpinning, which is to install a loading jack between the joist and the pile, and through the mechanical safety self-locking device set in the column cap, it will rise and fall synchronously with the jack to fix the underpinning Beam, after the underpinning is completed, the self-locking device is permanently placed in the connection between the joist and the pile, and cannot be used for turnover

Method used

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  • Controllable lifting underpinning tool

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Experimental program
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Effect test

Embodiment

[0016] The structure of the controllable lifting underpinning tool of the present invention is shown in Fig. 1 and Fig. 2 . It consists of a base plate 1, a door frame 2, a lower joist 3 and a lifting device. Two pairs of symmetrical cross-shaped door-shaped frames 2 are arranged on the bottom plate 1 . The lower joist 3 is formed by connecting four sections, which are distributed in a cross shape, and each section extends into a door-shaped frame respectively. Referring to FIG. 2 , the portal frame 2 is welded by steel columns 4 on both sides and upper joists 7 . The lower end of the steel column 4 is welded on the bottom plate 1, and the upper end is welded on the upper joist 7, forming a "door" structure with the upper joist 7. The lifting device is composed of an anchorage, a steel strand 8 and a through-hole jack 9. The anchorage is a ring 5 with an inner cone angle, and the ring 5 is provided with a clip 6 with an inner cone angle, and the steel strand 8 is passed thr...

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PUM

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Abstract

The invention relates to a controllable lifting support device, which is formed by bottom plate, door-shape frame, lower support beam and lifter, wherein the bottom plate is at least arranged with one couple of door-shape frame; the lower support beam is formed by several sections while each section is inserted into one door-shape frame and there is one lifter connected between each section and the door-shape frame. The invention has simple structure and simple operation, while the support system can be flexibly moved, to realize active control, and minimized additive stress in element.

Description

technical field [0001] The invention relates to an underpinning tool for buildings in civil engineering. Background technique [0002] Underpinning works include foundation underpinning and superstructure underpinning. Foundation underpinning can be applied to projects such as the development of underground space, foundation reinforcement and treatment, and building deviation correction; superstructure underpinning can be applied to expansion of use space such as demolition of walls and columns, as well as reconstruction projects such as building jacking and translation . The application prospect is very broad. [0003] There are many existing underpinning methods, but most of them are passive force-bearing methods, that is, the underpinned structure needs to undergo a certain displacement (deformation) before the load can be transferred to the underpinned member. Additional stress is generated in the structure, which has a certain impact on the safety of the structure. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/06E02D35/00E02D37/00
Inventor 贾强张鑫贾留东
Owner ENGINEERING RESEARCH INSTITUTE OF APPRAISAL AND STRENGTHENING SHANDONG JIANZHU UNIVERSITY
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