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Non-in-situ prepressing method of self-anchored type support frame and self-anchored type support frame thereof

A self-anchoring, non-in-situ technology, which is applied in the construction of large-tonnage structure supports and high piers, can solve the problems of limited maximum lifting capacity of tower cranes, inability to guarantee the construction period, and difficulty in realizing it, so as to achieve easy guarantee of construction quality, The effect of saving temporary construction materials and less restrictive conditions

Active Publication Date: 2011-09-28
THE 5TH ENG MBEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, although the water tank and sand bag are large in size, and considering the limited maximum lifting capacity of the tower crane, the operation is time-consuming, it is difficult to achieve in practice, and it is impossible to guarantee the construction period.

Method used

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  • Non-in-situ prepressing method of self-anchored type support frame and self-anchored type support frame thereof
  • Non-in-situ prepressing method of self-anchored type support frame and self-anchored type support frame thereof
  • Non-in-situ prepressing method of self-anchored type support frame and self-anchored type support frame thereof

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0030] image 3 It is the elevation layout drawing of the present invention in the embodiment of the 0# block support of Xinmin Minjiang River Bridge

[0031] This 0# block is a single-box single-chamber structure, and the self-anchoring bracket method is used for cast-in-place construction, that is, the supporting crossbar 8 of the self-anchoring bracket 2 extends into the pier hole 14 of the side wall of the pier body 13, The two self-anchored brackets 2-1 and 2-2 on the left and right sides of the pier body 13 are anchored on the pier body 13 by using the precision-rolled rebar 15 to pull between the horizontal tie rods 5 on the upper part of the self-anchored bracket 2 , to form a self-anchored system, two I 56a are arranged on the upper part of the horizontal tie rod 5 of the self-anchored bracket 2 as the main bear...

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Abstract

The invention discloses a non-in-situ prepressing method of a self-anchored type support frame and the self-anchored type support frame thereof. The method comprises the following steps: firstly, carrying out design of the self-anchored type support frame according to the self gravity of a structural object; processing and producing the self-anchored type support frame in a factory; distributing equipment such as the support frame, jacks and the like according to a non-in-situ prepressing distribution drawing of the self-anchored type support frame for carrying out non-in-situ prepressing in the factory; sequentially and progressively applying loads for carrying out prepressing; and observing the deformation quantity of the self-anchored type support frame and determining the pre-bulge degree of the support frame: determining the elasticity deformation quantity and the non-elasticity deformation of the self-anchored type support frame, simultaneously combining the support frame mechanics for calculating the obtained flexibility, and carrying out integral analysis to determine the pre-bulge degree of the self-anchored type support frame. The invention can effectively solve the prepresing problem in the high-pier large-tonnage structural object support frame construction, can also save the construction cost to a large degree on the premise of ensuring the engineering construction quality, can simultaneously shorten the structural object construction period, and can create good economic benefits.

Description

technical field [0001] The invention relates to the construction technology of supports for high piers and large-tonnage structures, in particular to an ex-situ preloading method for a self-anchored bracket and the self-anchored bracket. Background technique [0002] With the rapid development of our country's economy, the construction of transportation infrastructure has also been developed rapidly, and at the same time more and more long-span bridge construction projects have appeared. [0003] For example, the expressway project of the Leshan-Yibin section of the national key trunk line Ningbo-Zhangmu Highway is an important part of the ring road in the Chengdu-Chongqing area. The Xinmin Minjiang River Super Bridge is a key control project of the Leyi Expressway, located in Xiaogu Town, Qianwei County, Leshan City. The span combination of Xinmin Minjiang Extra Large Bridge is (14x40m) simply supported T-beam + (115m+200m+115m) continuous rigid frame + 15x40m simply suppor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G13/00E01D21/00
Inventor 李江彭建萍罗志雄韩井东王湘桥陈爱军赵则锋叶绍其
Owner THE 5TH ENG MBEC
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