Geotechnical Surprises―Or Are They? The 2004 H. Bolton Seed Lecture
Geotechnical Surprises―Or Are They? The 2004 H. Bolton Seed Lecture
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DOI：
10.1061/(asce)gt.1943-5606.0000040
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发表时间：
2009-07
影响因子：
3.9
通讯作者：
J. K. Mitchell
中科院分区：
文献类型：
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作者：
J. K. Mitchell
岩土工程的性质和范围是这样的，我们处理的问题和项目是挑战和兴奋的永无止境的源泉。在大多数情况下，我们在确定问题和开发适当的解决方案方面做得很好，从而成功地完成了项目。然而，不幸的是，仍然有太多的情况出了问题。通常，失败或其他糟糕的结果会让人大吃一惊。然而，在相当多的案例中，可能意想不到或令人惊讶的结果可能是预料到的。回顾了三个说明性的案例，然后对其进行检查，以确定是否合理地预见到了哪里出了问题。第一个涉及危险废物填埋场复合双层衬砌系统的稳定性破坏，这是众所周知的，也是被广泛研究的。第二个问题是不寻常的土壤类型，这是在大型土石坝土方施工中造成主要困难的原因。第三个是关于一场非常大的缓慢移动的山体滑坡，它对一条道路造成了严重的破坏，并影响了一座大型桥梁的安全。阐述了可能发生意外不良后果的几个原因，并提出了一些可能减少其发生频率和严重程度的方法。
The nature and scope of geotechnical engineering are such that the problems and projects we deal with are a never ending source of both challenge and excitement. In most cases we do very well in defining the problems and developing suitable solutions resulting in successful completed projects. Unfortunately, however, there remain far too many cases in which something goes wrong. Often a failure or other bad outcome comes as a complete surprise. However, in a significant number of cases perhaps the unexpected or surprise outcome might have been anticipated. Three illustrative case histories are reviewed and then examined to see if what went wrong might reasonably have been anticipated. The first involves a well-known and much studied stability failure along the composite double liner system of a hazardous waste landfill. The second is concerned with unusual soil types that were the cause of major difficulties during earthwork construction of a large embankment dam. The third is about a very large, slow-moving landslide that caused major distress to a roadway and impacted the safety of a large bridge. Several reasons why unexpected adverse outcomes may occur are stated and some possible means for reducing their frequency and severity in the future are proposed.