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湖北应城石膏矿四分矿用竖井开拓,其主、副、风井均需通过流砂层。1984年在风井和主井施工中,利用吊挂井壁与斜板桩法,分别顺利通过厚3.9及2.4米的流砂层。现以风井为例,简单介绍如下。 (一)工程概况 风井设计净直径3.0米,井颈掘进荒径4.2米。流砂层处于井颈部位,厚3.9米,主要由细砂、中砂及卵石组成,涌水量25～35米~3/小时。井口实际标高+35.84米,静水位标高+28米。
Hubei Yingcheng gypsum mine fourth shaft with mine development, the main, vice, wind wells are required to flow through the sand layer. In 1984, in the construction of air shafts and main shafts, the silt layers of 3.9 and 2.4 meters in thickness were passed through the hanging wall and the inclined plate pile method respectively. Wind shaft is an example, a brief introduction is as follows. (A) Project Overview Wind shaft design diameter of 3.0 meters, 4.2 meters short neck excavation. Flowing sand in the neck area, 3.9 meters thick, mainly composed of fine sand, sand and pebbles, water inflow 25 ~ 35 m ~ 3 / hour. Wellhead elevation of +35.84 meters, still water level elevation +28 meters.