Soil pressure balanced shield model test system capable of realizing cutterhead and lining pressure monitoring function

Abstract

The invention discloses a soil pressure balanced shield model test system capable of realizing a cutterhead and lining pressure monitoring function. The system comprises a model case and a model shield machine. The model shield machine comprises a shield casing, a cutting system, a jacking system, an excavation system, a support system and a pressure monitoring system. A detachable separator platein a middle position of the model case divides the model case into two parts in the same volume. A lining is fixed to the shield casing to realize a lining support function in the excavation processof the shield machine. Soil pressure and water pressure sensors are arranged on a cutterhead of the shield machine, and a wireless emitter emits soil pressure and water pressure data in the excavationsurface in real time, and a wireless receiver receives soil pressure and water pressure data in the excavation surface in real time. The soil pressure and water pressure sensors are arranged outsidethe lining, and senor leads are led out of a lead duct outside the lining, and are connected with an external data collector directly. The model shield test system can simulate the excavation processof the shield machine as well as a lining support function of the same.

Description

technical field [0001] The invention relates to an earth pressure balance shield model test system capable of realizing the monitoring function of cutter head and lining pressure, and belongs to the technical field of shield construction. 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. In order to better study the impact of shield tunneling construction on the surrounding environment in the laboratory, many scholars at home and abroad have conducted research on model s...

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Problems solved by technology

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

In order to better study the impact of shield tunneling construction on the surrounding environment in the laboratory, many scholars at home and abroad have conducted research on model shield tunneling machines, such as the small shield tunneling machine developed by Nomoto (1999) et al. machine, a small model shield machine suitable for clay established by Champan (2006), and a small shield simulation test bench developed by Shanghai Tunnel Co., Ltd. (1996). Shanghai Tunnel Co., Ltd. jointly with Zhejiang University and Tongji University (2004) developed a large-diameter model shield machine, Tongji University (2006) developed a double-hull single-spiral model shield, Beijing Jiaotong University (2007) developed an earth pressure balance shield equipment, He Chuan (2013) developed a The small-diameter mud-water balance shield machine, the small-diameter mud-water balance shield machine developed by Shandong University (2016), etc. These model shield tunneling machines can simulate the tunneling process of the shield well, but they cannot realize the tube tunneling during shield tunneling. The blade support function cannot be realized, and the pressure monitoring of the cutter head and lining cannot be realized

Shanghai University (2013) designed an earth pressure balance shield test device that can realize the lining support function, but the design of the test system is relatively simple, which is quite different from the real shield machine, and the design of the earth pressure chamber is only suitable for Soft clay with good flow plasticity has limited scope of application, but the shield machine cannot realize the monitoring of cutterhead and lining pressure

Tongji University (2013) designed a model shield machine that can carry out excavation surface stability test research, but the shield machine cannot realize the jacking function

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