A Geometric Series Layout Method for Shield Propulsion System

Abstract

The invention discloses an equal ratio series layout method for a shield propulsion system. A shield body, a support frame and N hydraulic cylinders are included, the shield body and the support frameare fixed, the N hydraulic cylinders are annular and are arranged on the support frame in symmetrical equal ratio series, the left ends of the hydraulic cylindersarepadded on a pressure-resistant hard rubber block and fixedly connected with the support frame,the right endsare supported on a tube piece by a support shoe, the entire shield is pushed to excavate forward by a reaction force of the tube piece, and a shield external load acts on the shield body and is transmitted to the tube piece through the hydraulic cylinders. The object of theinvention is to provide the equal ratio series layoutmethod for the shield propulsion system, the equal ratio series layoutmethod is adopted to arrange the hydraulic cylinders of the shield propulsion system, which can meet the installation requirementof uniform thrust points of the tube piece, and can solve the eccentric load caused by special geologies, variable loads and self-weight during the excavation process of the shield, a geological application range of the shield is increased, andthe rupture of the tube piece caused by the eccentric load is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, in particular to a geometric series layout method for a shield propulsion system. Background technique [0002] Shield tunneling is a large-scale construction machine used for tunnel excavation. It has the advantages of fast construction speed, no influence of climate and ground traffic, and one-time rapid prototyping. In recent years, the construction of subways in first- and second-tier cities in my country has basically adopted shield tunneling for tunnel construction, and shield tunneling has been widely used in the construction of various cities and engineering tunnels in China. [0003] Among the various subsystems of the shield machine, the shield propulsion system is the key subsystem of the shield machine, which mainly undertakes the propulsion task of the entire shield machine. In the existing four-partition uniform system of the shield machine, the number of hydraulic cylind...

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Problems solved by technology

[0004] During the construction of the shield, due to the great difference in the strength of the rock and soil on the excavation surface, the construction of the curve excavation, the adjustment and correction of the posture, and the "top-heavy" structure of the shield body, the external loads on the shield are in a large range. Due to the limitations of the arrangement and layout of hydraulic cylinders, the four-zone uniform system cannot better adapt to the excavation needs of different strata

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