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根据8个冻结井筒压力的实测资料,对井壁的外力作用过程,冻结压力成因进行了探讨。归纳出筑壁后段高中下部冻结压力两类显现规律曲线和冻结压力沿段高的三类分布形式,得到计算粘性土冻结压力的经验公式。在讨论永久地压时,根据实测数据和理论计算公式的分析,提出了深井表土地压的计算公式及使用该公式的临界深度。
According to the measured data of 8 frozen wellbore pressures, the process of external force and the cause of freezing pressure are discussed. This paper summarizes two types of appearance regularity of freezing pressure and the three types of distribution along the high section of freezing pressure in the lower part of the rear wall of high-rise building, and obtains the empirical formula for calculating the freezing pressure of clay. When discussing permanent pressure, according to the analysis of measured data and theoretical calculation formula, the calculation formula of surface pressure in deep well and the critical depth using this formula are proposed.