CAJ | 학술논문

香格里拉县桑那水库是云南省第一座在高海拔3300 m的高寒地区修建的中型水库，当地冬季气温低（最低气温-27.4℃），对坝基开挖、填筑、混凝土浇筑施工带来很大影响，设计提出：1）混凝土盖板及坝基保护采取引水保护，水与岸坡结合部位易形成冰冻，对这部分采取塑料薄膜加石碴覆盖；2）土料避开低温期施工，在施工中随时检查粘土含水量，在料场采取挖排水沟，开挖过的土料场上以及填筑好的防渗心墙上覆盖三色塑料薄膜加渣料作保护等保温防冻措施；3）在永久暴露混凝土表面配置温度钢筋，浇筑混凝土时掺入抗冻剂、减水剂、速凝剂，同时采取保温措施。
향격리랍현상나수고시운남성제일좌재고해발3300 m적고한지구수건적중형수고，당지동계기온저（최저기온-27.4℃），대패기개알、전축、혼응토요축시공대래흔대영향，설계제출：1）혼응토개판급패기보호채취인수보호，수여안파결합부위역형성빙동，대저부분채취소료박막가석사복개；2）토료피개저온기시공，재시공중수시검사점토함수량，재료장채취알배수구，개알과적토료장상이급전축호적방삼심장상복개삼색소료박막가사료작보호등보온방동조시；3）재영구폭로혼응토표면배치온도강근，요축혼응토시참입항동제、감수제、속응제，동시채취보온조시。
Located in Shangri-La county,Sangna reservoir, a medium-sized water-conservancy project,is the first medium reservoir built in extremely cold areas at an altitude of 3 300 meters. The local temperature in winter is low (the minimum temperature is 27.4 degrees),which severely affects the founda-tion excavation,filling and concrete pouring for the damming The design in this paper proposes the following countermeasures:1) we could use water to protect the concrete cover and dam foundation;and cover the combination parts between water and bank(where freezing can be easily formed)with plastic film and ballast;2)As for the earth material,we could avoid construct-ing in low temperatures and check the clay moisture frequently during construction;and dig ditches in the stock field and cover the field for anti-freezing protection with three-color plastic film and ballast;3)we could take measures to keep the concrete warm in the process of pouring by mixing it with antifreeze agent,water reducing agent and at the same time use temperature rebar on the surface of the permanent exposed concrete.