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前言宋岗泵站位于丹江口水库岸边浙川县境内,最大抽水流量16.5秒立米,解决移民安置区生产及生活用水,灌溉面积20.3万亩.泵站由引水渠、前池、取水头部、泵房、进出口管道、出水池等组成.泵房型式曾研究过坝后式竖井式,对竖井式泵房的施工比较了明挖和沉井两种方法.根据施工条件、运用管理、工程安全、经济等因素,最后选择了竖井式泵房采用沉井施工的方案.高程162米以下部分为钢筋混凝土圆筒竖井泵房,内径16米,外径18米,井筒高度33.6米.高程135.2米系水泵层,设有三台沅江48 I-35I型水泵、进出口钢管及控制阀等.高程143.23米系电机层,设有三台JSL1600-12TH型异步电机、出水钢管等.高程162米层布置电气设备、通风机、桥式起重机等.竖井为沉井,采用排水下沉法施工,由原地面高程152米下沉至高程128.4米,下沉深度23.6米,分两次进行下沉.沉井地基为第Ⅲ系粘土岩,高程162～152米为回填土.本工程于1976年开工,1978年建成,经运行情况良好.现将泵房井筒设计介绍如下.
Preface Songgang pumping station is located in the county of Danjiangkou reservoir Zhechuan County, the maximum pumping flow of 16.5 seconds legislation to solve the production and living water for resettlement areas, irrigated an area of 203000 mu.The pumping station by the diversion channel, the former pool, water head, Pump room, import and export pipeline, a pool, etc. The pumping station type has been studied after the dam shaft type, the shaft pump room construction compared with the open cut and caisson two methods according to the construction conditions, the use of management, engineering Safety, economy and other factors, the final choice of shaft pump room with open caisson construction program.The elevation of 162 meters below the part of the reinforced concrete cylindrical shaft pump house, an inner diameter of 16 meters, an outer diameter of 18 meters, the wellbore height of 33.6 meters. Elevation 135.2 Metric pump layer, with three Yuanjiang 48 I-35I-type pumps, import and export of steel and control valves, etc. Elevation 143.23 meters Department of motor layer, with three JSL1600-12TH-type asynchronous motor, the outlet pipe, etc. Elevation 162 m layer layout Electrical equipment, ventilators, bridge cranes, etc. The shaft is a caisson, which is constructed by drainage subsidence method and descended from an original surface elevation of 152 meters to an elevation of 128.4 meters with a sinking depth of 23.6 meters and sinking in two ways. Well foundation for the third line of clay Rock, elevation 162 ~ 152 meters for the backfill soil.This project started in 1976, completed in 1978, run well.Now the pump wellbore design is as follows.