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600t supporting gravity type grouting construction method

A construction method, a gravity-type technology, is applied in the field of gravity-type self-leveling mortar pouring construction, which can solve the problems that cannot meet the requirements of box girder erection, and achieve the effect of simple construction, high early strength and good fluidity

Active Publication Date: 2009-11-04
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the original construction method is used for the box girder, the requirements for the erection of the box girder cannot be met, so the erection of the box girder passenger dedicated line needs to find a new and more reliable construction method that can meet the requirements

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 600

[0024] The whole process of the 600t support gravity grouting construction method in this embodiment is carried out under natural conditions with a temperature of 22-28°C, and mainly includes the following steps:

[0025] (1), the jack is placed and the bridge is in place, this step includes:

[0026] a. Jack placement: Place two 600t-level jacks on each of the two piers. Before placing the jacks, place 20mm fine sand on the bottom, place a 20mm thick steel plate on the fine sand, and make it smooth. Press to the design height, and then level it with a level, and at the same time ensure that the difference between the reaction force of each fulcrum and the average value of the reaction force of the four fulcrums does not exceed ±5%, and the height difference of the four supports does not exceed 2mm;

[0027] b. Putting the bridge in place: Clear the debris in the hole of the pier support, moisten it with water, chisel the support pad stone, use a 900t-level beam erecting machi...

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PUM

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Abstract

The invention discloses a 600t bearing gravity grouting construction method. The main steps include: jack placement, bridge placement, mortar measurement, installation of funnels, conduits, shuttle grooves, mortar mixing, mortar pouring, strength testing and the like. The construction method of the invention is mainly suitable for the erection of the box-girder passenger dedicated line. In the design, the comfort of the passengers during the operation of the train is fully considered. Anchor bolt holes, and through bridge positioning, fulcrum control, fulcrum observation, etc., ensure the accuracy of the beam and the quality of anchoring, so that the bridge erection meets the design requirements and design standards; and the entire site construction is simple and easy to operate.

Description

technical field [0001] The invention relates to a gravitational self-leveling mortar pouring construction method, which belongs to the technical field of simply supported railway box girder erection bearing anchorage technology. Background technique [0002] The box girder passenger dedicated line puts forward higher requirements on the safe service life of the structure. Due to its high speed and large support area, the bottom of the support is required to be dense, and the height difference of the four supports should not exceed 2mm. The original common construction method is mainly for T-shaped beams, the bottom area of ​​the support is small, and manual pre-leveling can meet the requirements. If the original construction method is used for the box girder, the requirements for erecting the box girder cannot be met. Therefore, it is necessary to find a new and more reliable construction method that can meet the requirements for the erection of the box girder passenger dedi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D2/04
Inventor 钟卫翔邹宏伟韩伟王强唐浩先陈杰孙祖红周文武梁兴华李华月
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD