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我部在一项工程中,按设计要求,需在水下300m处打一个混凝土塞子。由于深水下浇注混凝土有些技术问题尚不易解决,因此请长春水利科研所进行了深水泵注水泥浆的技术咨询。 一、工程概况 按设计要求,需在一口深300m、直径2.5m、静水位-20m(地面±0)的井筒下部浇注一个混凝土塞子。该塞子的技术要求是:3天抗压强度大于120kg/cm~2;5天抗压强度大于150kg/cm~2,抗剪强度为10kg/cm~2,水泥水化热的绝热温升小于70℃。由
In our project, according to the design requirements, a concrete plug must be placed 300m below the water. As some technical problems of deep-water concrete pouring are not easy to solve, so Changchun Water Resources Institute requested deep-water pumping cement slurry technical advice. I. Project Overview According to the design requirements, a concrete plug shall be poured in the lower part of a wellbore with a depth of 300m, a diameter of 2.5m and a static water level of -20m (ground ±0). The technical requirements of this plug are: 3 days compressive strength greater than 120kg/cm~2; 5 days compressive strength greater than 150kg/cm~2, shear strength 10kg/cm~2, adiabatic temperature rise of cement hydration heat is less than 70 °C. by