钻井法施工大口径钢壁立井施工工艺

Construction Process of Large Diameter Steel Wall Shaft with Drilling Method

摘要:

钻井法施工大口径钢壁立井因施工周期短、建井成本低、安全性能高等优点为小型国有企业、乡镇、集体、私营和个体企业的发展提供了重要支撑，但至今为止对钻井法施工大口径钢壁立井施工工艺的研究明显滞后于市场发展的要求，为探索解决这一问题，结合工程实例，从埋设井口定位管—锁口—泥浆循环系统—安装设备—钻孔—扩孔—洗井—下井筒—注浆止水（固井）—排浆—检查固井效果等方面介绍了钻井法施工大口径钢壁立井施工工艺。

Abstract:

Drilling method is an important support in large diameter steel wall shaft construction for small state-run enterprise, township enterprise, collective enterprise, collective enterprise, private enterprise and individual enterprise with its advantages of short construction period, low cost and high safety. But to now, the study on the construction technology of drilling method for large diameter steel wall of shaft obviously lags behind the market development requirement, the paper introduces the construction technology in wellhead positioning tube burying, wellhead locking, slurry circulation system, equipment installation, hole drilling, hole reaming, well washing, shaft casing, sealing by grouting (cementing), slurry discharging and cementing examination.