Shandong Jianzhu University

Engineering Appraisal and Reinforcement Institute Co.,ltd, Shandong Jianzhu University

Guohui Liu

Jun Wang

Shengzhi Wu

Jianyong Han

Hougang Ding

Xisen Fan

Erbin Liang

Zhikang Wang

Xiang Gao

Guangbiao Shao

Determining an active jacking force of a tunneling closely undercrossing existing station, includes: acquiring design parameters of stations, and geological parameters of a construction site; obtaining a stress solution expression of the active jacking force on the existing station to obtain a stress solution of any point in a semi-infinite space under the action of a vertical load, replacing the vertical load with a vertical load acting on the existing station, and obtain a vertical stress solution of the existing station; obtaining a relational expression between the deflection and the stress solution of the existing station; and substituting the stress solution expression of the active jacking force into the relational expression between the deflection and the stress solution of the existing station according to boundary conditions at both ends of a beam on elastic foundation to obtain the active jacking force that controls the deflection of the existing station.

Method for determining active jacking force of tunneling closely undercrossing existing station

A composite support structure, a construction system, and a method, the composite support structure includes a plurality of arc plate rings that are longitudinally arranged along a roadway. A concrete fill steel tube support is arranged on an inner side or an outer side of each arc plate ring. The arc plate ring is formed by splicing a plurality of arc plates. Each concrete fill steel tube support is formed by splicing a plurality of steel pipe sections. The arc plate rings and the concrete fill steel tube supports are capable of jointly supporting walls of the roadway. The support structure has high bearing capability, high construction efficiency of a construction system, and low labor intensity.

Composite support structure, construction system, and method

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Jinan, China

Guohui Liu