Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure
A reinforced concrete and support structure technology, which is applied in basic structure engineering, excavation, construction, etc., can solve the problems of difficulty in reaching the level of the foundation pit, vertical two-way force balance, and single support form, and achieves small deformation and convenient construction. , the effect is remarkable
Inactive Publication Date: 2013-10-02
广西建工第五建筑工程集团有限公司
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The invention discloses a long-span reinforced concrete inner support structure of a rectangular deep foundation pit, which comprises a foundation pit edge breast wall retaining structure, a plurality of layers of inner support three-dimensional timbering structures with steel structure support columns, and a top beam, wherein each inner support three-dimensional timbering structure comprises a foundation pit corner part structure, a foundation pit middle part symmetrical and opposite support structure, and longitudinal beams; each foundation pit middle part symmetrical and opposite support structure comprises a cross beam and two small inclined struts positioned at the two ends of the cross beam; the longitudinal beams are beams which are parallel to long edges of the foundation pit and are positioned at the middle part of the foundation pit; the steel support columns directly reach below the bottom of the foundation pit; the bottoms of the steel structure support columns are anchored by placed concrete; ring beams are arranged at parts where the cross beams, the longitudinal beams and the steel structure support columns at the middle part of the foundation pit are intersected; a support waist beam is arranged at a connection part between the inner support three-dimensional timbering structure and the middle part of the foundation pit edge breast wall retaining structure; and the cross beams, longitudinal beams, the ring beams and the waist beam of the inner support three-dimensional timbering structure are reinforced concrete or combined type large steel frame structures. The inner support structure is simple and visual in design, convenient to construct, large in support span, and significant in timbering effect.
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