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中国电建集团中南勘测设计研究院有限公司 410014
【摘 要】溧阳抽水蓄能电站高压电缆竖井高97m。电缆竖井整体处于岩脉中，围岩条件差，电缆竖井开挖支护难度大。为增加竖井围岩的稳定性，竖井采用圆型断面设计，支护采用锚喷支护与钢筋混凝土衬砌的联合支护型式。为加快竖井的工期，竖井内部结构采用预制结构，衬砌采用滑模施工等措施，在保證竖井结构安全的基础上，有效地解决了施工工期紧张的问题。溧阳工程电缆竖井设计具有广泛的代表性，对其它工程高压电缆竖井设计具有较好的参考与借鉴作用。
【关键词】高压电缆竖井；岩脉；体型设计；支护设计；结构设计
Design of HV Cable Shaft of Liyang Pumped Storage Power Station
KANG Fenhong
（Powerchina Zhongnan Engineering Corporation Limited，Changsha Hunan 410014）
Abstract：The HV cable shaft of Liyang pumped storage power station has a height of 97 meters.The excavating and supporting of the shaft is difficult as the condition of the surrounding rock is poor when the whole cable shaft lies in dikes.In order to increase the stability of the surrounding rock，the cable shaft is designed with circular section，and combined supporting which contains bolting and shotcrete lining and reinforced concrete Lining is used.The measures such as application of prefabricated structure and slip form construction are taken in order to shorten the construction period of the shaft，which can solve the problem of the shortage of construction period effectively on the basis of safety.The HV cable shaft of Liyang pumped storage power station is broadly representative which can provide good reference for other project.
Key words：HV cable shaft；dike；shape design；support design；structure design
0引言
溧阳抽水蓄能电站高压电缆为2回500kV出线，从地下主变洞下游侧通过392m高压电缆平洞和97m的高压电缆竖井与地面GIS开关站电缆室相连。如图1所示。
图1 高压电缆平洞及竖井平面布置图
地面开关站场地地形较平缓。南侧为山坡茶地，高程90.00m～95.00m，地表为残积物。其余为阶梯状旱地，高程85.00m～90.00m，地表为冲洪积物。覆盖层厚度变化较大，层底高程69.00m ～82.95m。下伏基岩为燕山期安山斑岩。结合前期地质钻探和电缆平洞施工揭露情况，开关站区域及其西北方向均为
【摘 要】溧阳抽水蓄能电站高压电缆竖井高97m。电缆竖井整体处于岩脉中，围岩条件差，电缆竖井开挖支护难度大。为增加竖井围岩的稳定性，竖井采用圆型断面设计，支护采用锚喷支护与钢筋混凝土衬砌的联合支护型式。为加快竖井的工期，竖井内部结构采用预制结构，衬砌采用滑模施工等措施，在保證竖井结构安全的基础上，有效地解决了施工工期紧张的问题。溧阳工程电缆竖井设计具有广泛的代表性，对其它工程高压电缆竖井设计具有较好的参考与借鉴作用。
【关键词】高压电缆竖井；岩脉；体型设计；支护设计；结构设计
Design of HV Cable Shaft of Liyang Pumped Storage Power Station
KANG Fenhong
（Powerchina Zhongnan Engineering Corporation Limited，Changsha Hunan 410014）
Abstract：The HV cable shaft of Liyang pumped storage power station has a height of 97 meters.The excavating and supporting of the shaft is difficult as the condition of the surrounding rock is poor when the whole cable shaft lies in dikes.In order to increase the stability of the surrounding rock，the cable shaft is designed with circular section，and combined supporting which contains bolting and shotcrete lining and reinforced concrete Lining is used.The measures such as application of prefabricated structure and slip form construction are taken in order to shorten the construction period of the shaft，which can solve the problem of the shortage of construction period effectively on the basis of safety.The HV cable shaft of Liyang pumped storage power station is broadly representative which can provide good reference for other project.
Key words：HV cable shaft；dike；shape design；support design；structure design
0引言
溧阳抽水蓄能电站高压电缆为2回500kV出线，从地下主变洞下游侧通过392m高压电缆平洞和97m的高压电缆竖井与地面GIS开关站电缆室相连。如图1所示。
图1 高压电缆平洞及竖井平面布置图
地面开关站场地地形较平缓。南侧为山坡茶地，高程90.00m～95.00m，地表为残积物。其余为阶梯状旱地，高程85.00m～90.00m，地表为冲洪积物。覆盖层厚度变化较大，层底高程69.00m ～82.95m。下伏基岩为燕山期安山斑岩。结合前期地质钻探和电缆平洞施工揭露情况，开关站区域及其西北方向均为