A starting device of a model shield machine with a movable counter force support

Abstract

The invention discloses a model shield tunneling machine starting device with a movable counter-force supporting seat. The device is composed of the three parts of the counter-force supporting seat, a counter-force frame and a model shield tunneling machine bearing frame. The counter-force supporting seat can move along a guide rail, and the counter-force supporting seat is fixed to the position of a positioning hole of the counter-force supporting seat guide rail through a steel pin. A model shield tunneling machine is arranged on a guide rail of the bearing frame, a hydraulic jack of the model shield tunneling machine is arranged at one end which is far away from a soil box, the thrust of the hydraulic jack is evenly transmitted to a counter-force piece of the counter-force supporting seat in the testing process, meanwhile the counter-force supporting seat generates thrust to the model shield tunneling machine through the hydraulic jack so that the model shield tunneling machine can move to conduct tunneling for a section of distance, then the hydraulic jack is taken back, the counter-force supporting seat is moved to a next positioning hole, and the counter-force supporting seat is fixed. After repetition, starting of the model shield tunneling machine is finally completed. According to the model shield tunneling machine starting device with the movable counter-force supporting seat, when the device simulates the shield tunneling machine to conduct starting, supporting and protecting and positioning of a negative pipe piece are not needed, the process of starting of the shield tunneling machine can be truly simulated, the process of a model test of shield excavation can further be simplified, and the testing efficiency is improved.

Description

technical field [0001] The invention relates to a starting device for a model shield machine, in particular to a starting device for a model shield machine capable of realizing the movement of a reaction force support. Background technique [0002] Tunnels built by the shield method have fast construction speed, low noise, and do not affect ground traffic. They are the first choice for urban subway tunnel construction. However, the construction of the shield method will inevitably have an impact on the surrounding strata and the environment. The field test period is long, the cost is high, and it is greatly affected by the stratum conditions. Therefore, it is an important research to use the model shield machine to carry out the tunnel excavation simulation test. method. Based on this, scholars at home and abroad have developed model shield machines and carried out shield construction process simulations, such as the small shield machine developed by Nomoto1999 and others t...

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Problems solved by technology

On this basis, He Chuan developed the starting device of the model shield machine in 2013. This device can truly reflect the starting process of the shield machine, but the assembly process of the negative segments at the starting stage of the model shield machine is very complicated, and The model test is different from the actual project, the size of the negative segment, the distance between the negative segment and the tail of the shield is very small, which makes it difficult to complete the assembly of the negative segment

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