我们苏州地区、苏州市及有关县的同志,在江苏省地震局的帮助下,针对目前土应力仪存在的一些问题,进行了应变片式地应力仪的研制。经多次试验,最后选用硬质聚氯乙烯塑料做探头外壳,用应变片作传感元件。 用聚氯乙烯材料作探头外壳有以下优点:①杨氏模量比金属小,弹性好;②耐腐蚀,寿命 With the help of the Earthquake Administration of Jiangsu Province, our comrades in Suzhou, Suzhou and other related counties have carried out the development of strain gauge geomechanics in light of some problems existing in the present earth stress meter. After many tests, the final selection of rigid PVC plastic probe shell, with strain gauge for sensing components. Polyvinyl chloride material for the probe shell has the following advantages: ① Young’s modulus is smaller than metal, good elasticity; ② corrosion-resistant, life