Half-covered digging metro station foundation pit steel support parallel support erecting method and structure
A subway station, steel support technology, applied in the direction of basic structure engineering, excavation, underwater structures, etc., can solve the problems that the steel support cannot be lowered horizontally, the steel support cannot be erected, and mechanical equipment cannot be adopted. Achieve the effects of optimizing the support structure in the station, reducing installation and dismantling time, and avoiding erection risks
Active Publication Date: 2019-02-19
URBAN MASS TRANSIT ENG CO LTD OF CHINA RAILWAY 11TH BUREAU GRP
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Problems solved by technology
However, in the construction of the semi-covered station, due to the influence of the original first steel support connecting beam and the bedding slab, the steel support and support cannot be lowered horizontally, and mechanical equipment cannot be used to cooperate in the station, and the erection of the support is difficult and difficult to implement , the safety risk is greater, so it is not possible to erect steel supports and support
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[0042] The present invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 , figure 2 and image 3 The steel support and erection structure shown in the construction of a half-covered excavation subway station includes a foundation pit enclosure structure 1, a bedding structure erected at the foundation pit opening and covering the general foundation pit 8, and a first road erected in the foundation pit The steel support 6 and the second steel support 4, the enclosure structure of the foundation pit shown adopts an underground diaphragm wall, or bored cast-in-place piles, or artificially dug piles. The blanket structure 8 includes a plurality of temporary pillars 8-1, crossbeams 8-2, longitudinal connecting beams 8-3 and blankets 8-4, and the plurality of temporary pillars 8-1 are equidistantly arranged in the middle of the foundation pit, and the foundation pit The pit is divided into two parts, and its multiple longitudin...
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The invention provides a half-covered digging metro station foundation pit steel support parallel support erecting method and structure. The erecting structure comprises a foundation pit retaining structure, a paving structure, first and second steel supports and a steel support parallel support erected side by side with respect to the first steel support; and during erection of the steel supportparallel support, steel support parallel support bearings are welded to the sides of the two ends of the of the first steel support firstly, then the inclination angle of the steel support parallel support and the weight of an additional weight are selected through calculation, the additional weight is lifted through a steel wire lifting rope to be arranged on one end of the steel support parallelsupport, the steel support parallel support is hoisted into a foundation pit from an uncovered area of a foundation pit opening at the set inclination angle, after the steel support parallel supportcompletely enters the foundation pit, the steel support parallel support is in the horizontal state through the action of the additional weight, and the two ends of the steel support parallel supportare placed on the steel support parallel support bearings. The method and structure solve the problems that erection of a parallel support of an existing half-covered digging metro station is difficult and safety risks are large, erection of the steel support parallel support is facilitated, support replacement is avoided, and the influence of installation and detachment of a replaced support on the construction period is reduced.
Description
technical field [0001] The invention belongs to the technical field of subway station construction, and in particular relates to a method and structure for erecting steel supports and bracing for a foundation pit of a half-cover excavated subway station. Background technique [0002] Among the construction methods of large-scale underground projects such as subway stations or underground parking lots in busy downtown areas, although the open-cut method has the advantages of simple construction technology, high construction efficiency, and low engineering cost, it has great impact on the surrounding traffic conditions. The interference is great, and it is not suitable for urban areas with dense traffic. The cover excavation method is a method in which the top is closed after the ground is excavated to a certain depth, and the rest of the substructure is constructed under the closed top cover. The cover-and-excavation method has little impact on the surrounding traffic enviro...
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IPC IPC(8): E02D29/055E02D17/04
CPCE02D17/04E02D29/055
Inventor 袁旭东杨川杨浪彭刚朱明喜谢桐李鹏
Owner URBAN MASS TRANSIT ENG CO LTD OF CHINA RAILWAY 11TH BUREAU GRP