乌兹别克斯坦Qamchiq特长铁路隧道缩短工期方案探讨

Discussion on Construction Schedule Shortening Program for Qamchiq Extra-long Railway Tunnel in Uzbekistan

以乌兹别克斯坦Qamchiq特长铁路隧道为例,在工期滞后的情况下,为纠正施工进度偏差,经过分析有4种备选方案,分别是安全洞超前增援主洞方案、增加斜井或竖井方案、增加支洞方案和加快施工进度的管理措施,通过对以上方案的比较分析,初步选择为通过斜井增设支洞方案,然后对增设支洞方案进行技术经济分析,确定了支洞长度和断面大小,经过现场实施,得出的结论是:在斜井内增设支洞,可以以较小的成本增加获得较大的工期节约。

Comparison is made among 4 construction schedules,including adding advance safe tunnel to support main tunnel,adding inclined / vertical shaft,adding branch tunnel and improving the construction speed,by taking Qamchiq extra-long railway tunnel in Uzbekistan for example. The construction schedule of adding branch tunnel is adopted and technically and economically analyzed. The construction parameters are determined. Finally,it illustrates that by adding branch tunnel,the construction cost can be reduced and the construction schedule can be shortened.