In the process of foundation pit excavation, IPS construction method support structure can ensure the safety of the support structure and control the deformation of surrounding soil mass, effectively protect the safety of buildings (structures), municipal roads, pipelines and other environments around the foundation pit by adding components, applying prestress and other measures against possible large water and soil pressures or sudden construction loads.

Combined with the remote real-time monitoring system, it can effectively and accurately control the displacement of the foundation pit and greatly reduce the deformation of the foundation pit.

The foundation engineering shares the new construction method, new technology, new equipment, new trend, new policy – process principle cast prestressed fish belly beam steel structure support technology (IPS construction method), which is a new type of deep foundation pit support internal support structure system based on the prestress principle, aiming at the shortcomings of traditional concrete internal support and steel support, through a large number of engineering research and practical application.

In order to effectively monitor the water and soil pressure on the side wall of the foundation pit and the deformation of the retaining structure, a multi-function monitoring and alarm system is adopted, which completely eliminates the possibility of the damage of the retaining structure of the foundation pit.

Compared with the traditional support, the construction cost of this method is reduced by more than 20%, and the construction period of installation, demolition, excavation and underground structure is shortened by more than 40%.

The high-precision process requires strict control of foundation pit deformation, and greatly reduces the impact of underground space development and construction on surrounding buildings (structures), municipal roads and pipelines and other environments.

II IPS construction method plane layout III construction technology and quality control standard IV Project safety is compared with the failure mode of traditional support system – brittle failure, and the failure mode of pre-stressed fish belly beam tool type composite internal support is ductile failure, thus improving the safety of foundation pit support structure.

All component materials are recycled and reused, which conforms to the national industrial policy of energy conservation and emission reduction, and is a green construction technology.

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It not only significantly improves the construction conditions of underground works, but also significantly reduces the construction period and cost of the installation, removal, earthwork excavation of enclosure structures and the construction of main structures.

Economic Benefits This construction method provides open construction space, which facilitates the excavation, transportation and construction of underground structures.

Compared with the traditional concrete internal support and steel support, it greatly improves the overall stiffness and stability of the support system.

It is composed of fish belly beam (high-strength and low relaxation steel strand as upper chord member, H-shaped steel as load-bearing beam, and H-shaped steel bracing beams with different lengths), opposite brace, angle brace, column, cross beam, pull rod, triangular contact, pre compression jacking device and other standard components, which are combined and applied with prestress to form a plane prestressed support system and a three-dimensional structural system.

The structural system with high rigidity and stability of environmental benefits effectively improves the safety of foundation pit.

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This technology has made a major breakthrough in the internal support technology of deep foundation pit support, and is currently the most advanced internal support technology in the world.

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