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万家寨1号溢流洞周围地形险峻,其洞口上方有一位于洞顶上部约40m处的悬臂岩体,厚度为3.8～14.6m,宽度约为30m,最大伸出长度为18m。引黄国际I标合同文件招标图纸的地形图未提供反映1号溢流洞洞口上方悬臂岩体。由于前期勘探和施工图纸设计过程中,忽略了悬臂稳定问题。工程师又不能在合理的时间内答复承包商,而承包商要对工程施工过程中的安全负责;导致承包商对其进行了工期延误和费用索赔。如果在招标图纸和施工图纸中标示出悬臂并说明其稳定,就可以避免此索赔事件的发生。
Wanjiazhai No. 1 overflow creek around the steep terrain, the top of the hole above the top of a cave about 40m Department of cantilever rock, the thickness of 3.8 ~ 14.6m, width of about 30m, the maximum length of 18m. The topographic map of the bidding drawings of the I-Contract does not provide information on the cantilever bodies above the No. 1 overflow tunnel openings. As the early exploration and construction drawings design process, neglected the cantilever stability issues. The engineer can not reply to the contractor within a reasonable time, and the contractor is responsible for the safety of the construction process. As a result, the contractor delays the project and claims costs. If the tender drawings and construction drawings indicate the cantilever and its stability, you can avoid the claim of the incident.