Model shield machine cutter head pressure monitoring system capable of achieving function of excavation surface pressure monitoring

Abstract

The invention discloses a model shield machine cutter head pressure monitoring system capable of achieving the function of excavation surface pressure monitoring. The model shield machine cutter headpressure monitoring system comprises earth pressure stress sensors, osmometers, a cutter head, a cutter head bearing and a wireless transmitter. The pressure sensors are arranged on the cutter head, and the sensing faces are flush with a cutter head panel; a leading wire penetrates through a leading wire groove in the rear portion of the cutter head panel to enter the cutter head bearing; the front portion of the cutter head bearing is hollow; leading wire holes are formed in a rear bearing of a partition plate; leading wires of the sensors are led from the center of the cutter head bearing through the leading wire holes to the exterior of the cutter head bearing; and a leading wire groove is formed in the outer surface of the cutter head bearing, the leading wire is inlaid in the leadingwire groove and then led to the shield tail to be connected with the wireless transmitter. The wireless transmitter is fixed to the tail of the cutter head bearing and synchronously rotates along withthe cutter head, and thus the leading wires of the sensors can be prevented from being twisted during testing. The wireless transmitter converts electric signals of the pressure sensors into wirelesssignals to be transmitted, an external wireless receiving device receives and stores data, and the function of pressure real-time monitoring of the shield excavation surface is achieved.

Description

technical field [0001] The invention relates to a model shield machine cutterhead pressure monitoring system capable of realizing the real-time monitoring function of earth pressure and water pressure on an excavation surface, and belongs to the technical field of shield tunneling. 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 a...

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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-shell single-helix model shield machine, 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 machine testing machines all focus on the realization of the simulated shield tunneling process, and none of the excavation face. Real-time monitoring of earth pressure and water pressure

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