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土压力传感器是土压平衡式盾构机中的关键检测元件。由于被测介质是土壤砂砾,其中含有坚硬砂石颗粒或树根碎屑,对传感器感压面有较强的针刺作用。这也决定了土压力传感器需要采用特殊的隔离结构而不能采用普通压力传感器感压面直接接触被测介质的结构。
Earth pressure sensor is the key detection element in earth pressure balance shield machine. As the measured medium is soil gravel, which contains hard gravel particles or tree roots debris, the sensor pressure sensitive surface has a strong acupuncture effect. This also determines the earth pressure sensor needs special isolation structure can not be used ordinary pressure sensor pressure contact surface directly contact with the measured medium structure.