CAJ | 학술논문

深覆盖层的坝基设计是工程设计的难点。多布水电站河床式厂房位于河床深厚覆盖层上，地基承载力较低，变形沉降问题突出。根据厂房整体稳定及基础应力计算成果，完建工况时基础承载力富裕量很小。为提高地基承载力，减小沉降变形，设计采用混凝土灌注桩、旋喷桩等多种措施进行基础处理。计算表明，经处理后复合地基承载力满足设计要求，设计采用的基础处理方案是安全、合理、可行的。
심복개층적패기설계시공정설계적난점。다포수전참하상식엄방위우하상심후복개층상，지기승재력교저，변형침강문제돌출。근거엄방정체은정급기출응력계산성과，완건공황시기출승재력부유량흔소。위제고지기승재력，감소침강변형，설계채용혼응토관주장、선분장등다충조시진행기출처리。계산표명，경처리후복합지기승재력만족설계요구，설계채용적기출처리방안시안전、합리、가행적。
The design of the dam foundation in the deep overburden is the difficulty in the engineering design.The run-of-the-river pow-erhouse of Duobu Hydropower Project is seated on the deep and thick overburden on the riverbed, the bearing capacity of its foundation is lower and the deformation settlement is outstanding.In accordance with calculation of the integrated powerhouse stability and foundation stress, the margin of the bearing capacity of the powerhouse foundation is limited when the powerhouse is completed.To improve the bear-ing capacity of the powerhouse foundation and decrease the settlement deformation, the foundation is treated by such measures as applica-tion of concrete borehole pile, jet grouting pile, etc in design.The calculation shows that the bearing capacity of the composite foundation (after being treated) satisfies the design requirement.Scheme for the foundation treatment applied by the designer is safe, reasonable and feasible.