Settlement Behavior of an Avalanche Protection Gallery Founded on Loose Sandy Silt
Settlement Behavior of an Avalanche Protection Gallery Founded on Loose Sandy Silt
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松散砂质淤泥上的雪崩防护廊道的沉降行为
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
W. Steiner
中科院分区：
文献类型：
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作者：
W. Steiner
位于瑞士阿尔卑斯山的雪崩保护画廊建立在靠近陡峭岩石山腰的冲积地面上。后面的挡土墙，在一个可变的距离几到二十米的岩石墙，是建立在一个条形基础。面柱的基脚位于桩帽上，桩帽由20多米长的打入桩支撑。在施工过程中对后墙的沉降和倾斜进行了监测。在该结构的南端，观察到的沉降大大超过了预期的沉降。因此，又钻了一个孔，并进行了现场平板硬度计（DMT）测试。所遇到的松散淤泥和沙子的更厚和更可压缩层解释了后墙和柱基的沉降。计算沉降与膨胀模量从DMT测试同意与观察到的沉降。实测二次沉降系数C α = 0.28%。
An avalanche protection gallery located in the Swiss Alps was founded on alluvial ground close to the steep rocky mountainside. The rear retaining wall, at a variable distance of a few to twenty meters from the wall of rock, was founded on a strip footing. The footings for the face columns were placed on pile caps supported by driven piles of more than 20 meters length. The settlement and inclination behavior of the rear wall was monitored during backfilling. At the southern end of the structure the observed settlement substantially exceeded the anticipated settlement. Therefore, an additional boring was drilled and in-situ flat dilatometer (DMT) tests were performed. The much thicker and more compressible layer of loose silt and sand encountered explained the settlement of the rear wall and column footings. Computed settlements with dilatation moduli from DMT-tests agree well with the observed settlements. An in-situ coefficient of secondary settlement C α = 0.28% was obtained.