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目前,国内外在电测静力触探中广泛采用的是电阻应变式土层阻力传感器(以下简称电阻式探头)。在使用过程中,旅大市建筑设计院等单位发现这种探头具有一定的局限性,它只适用于松软土地层,而对多层软硬不均的地基土,尤其是遇到卵石层时,因弹性元件壁厚较难掌握,往往未达到所要求的触探深度,电阻应变片即破损,不能继续贯入。此外,电阻应变式探头的贴片、补偿等工艺比较复杂,并受环境温度的影响而产生零点漂移现象。为此,旅大市建筑设计院于1979年要求协助解决上述存在的问题。我所
At present, resistance strain-type soil resistance sensors (hereinafter referred to as resistance probes) are widely used at home and abroad in electric probing static penetration testing. In the process of use, the Lvda Architectural Design Institute and other units found that the probe has certain limitations. It only applies to soft soil layers, but it is not suitable for multi-layered soft and hard foundation soils, especially when it encounters pebbles. Because the thickness of the elastic element is difficult to grasp, the required penetration depth is often not reached, and the resistance strain gauge is damaged and cannot be penetrated. In addition, the patch, compensation, and other processes of resistance strain probes are relatively complex and are subject to zero drift due to ambient temperature. To this end, the Department of Architecture and Design of the City of Luda City in 1979 requested assistance in resolving the above-mentioned problems. I