Compared with the traditional steel composite bracing, the prestressed steel composite BRACING improves the overall stiffness and stability of the bracing system, and improves the safety of the foundation PIT bracing structure. Shanghai strong foundation prestressed fish belly & NBSP; The foundation pit steel support technology adopts prestressed fish-belly beam structure, which further reduces the number of steel members, provides open construction space, and makes excavation, transportation and underground structure construction more convenient.
Details >The prestressed steel composite support of Shanghai strong foundation adopts special fish-belly beam structure. This structure can reduce the use of steel components, significantly improve the construction conditions of underground space while ensuring the construction quality. Compared with the traditional support technology, the cost is reduced by more than 20%. The construction time of installation, demolition, excavation and underground structure is saved by 40%. The above.
Details >Section steel composite support is composed of standardized steel members, fast installation; No maintenance & NBSP; . The PRESTRESSED fish-BELLY FOUNDATION PIT steel support technology of Shanghai strong foundation consists of fish-belly beam, counter brace, Angle brace, column, beam, contact bar, high-strength contact, prestressed loading device and other standard components. Compared with the traditional support system, the steel components are reduced. Volume, support costs and construction costs have been reduced by more than 30%. The site acceptance and yard of steel components are also very important.
Details >The construction technology of cement soil-concrete interlocking pile in Shanghai strong foundation adopts separated cement soil-cement mixing pile to form a row of equally spaced cement soil-cement piles at a time. The original soil-cement mixing pile machine is used to cut part of the cement soil-cement mixing pile between two cement soil-cement mixing piles to form a hole.
Details >In THE CONSTRUCTION of section steel combination support, in order to deal with all kinds of danger and emergency situations that may appear, control the expansion of the situation, reduce the loss of life and property of the country and the people, and ensure the smooth construction and production, it is necessary to establish and perfect various preplans, so as to achieve clear responsibilities, simple procedures, reasonable division of labor and sensitive response. The following is the emergency plan for the prestressed fish-belly foundation pit steel support of a project in Shanghai strong foundation.
Details >Prestressed fish-belly foundation pit steel support technology is based on the principle of prestress, through a large number of engineering research and practical application. A kind of deep foundation pit supporting structure system is developed, which is composed of fish belly beam, counter brace, Angle brace, column, beam, contact bar, high strength contact, prestressed loading device and other standard components.
Details >Shanghai STRONG foundation STEEL composite support technology has the advantages of short construction period, low cost, large space and so on. It adopts prestressed fish belly beam structure, also called prestressed fish belly foundation pit steel support. At the same time, the construction quality is strictly controlled, the construction process is standardized, safety and quality first, and the deformation of foundation pit support is strictly monitored. The following is the deformation monitoring of a project:
Details >Section steel combination support adopts high strength bolt link. In the construction process, there are the following precautions: 1. High strength bolt can not be used as a temporary bolt for installation. This is easy to cause the hole is not straight, or forced on the hole, so that the connecting plate fits, the screw thread damage of the bolt, the torque coefficient changes, the bolt shaft force is uneven, or the connecting plate produces internal stress.
Details >Foundation pit classification: 1. First-level foundation pit: the combination of important engineering, supporting structure and foundation structure, excavation depth > 10m, historical or modern excellent buildings, important facilities and important pipelines within the influence area of excavation shall be strictly protected;
Details >In order to facilitate the earthwork excavation of foundation pit, Shanghai Strong Foundation has developed three convenient earthwork excavation auxiliary platforms (earth-moving trestle) : 1. 2. Cross-supported steel platform; 3. Large steel trestle.
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