Effectiveness detection of dynamic compaction on silt foundations of a flood-prevention dyke at Yibin
Effectiveness detection of dynamic compaction on silt foundations of a flood-prevention dyke at Yibin
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发表时间：
2004
影响因子：
1.5
通讯作者：
Zhuo Zi-hong
中科院分区：
文献类型：
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作者：
Zhuo Zi-hong
给出了宜宾防洪堤强夯法加固粉质土地基的现场检测结果和室内检测结果。现场检测资料表明，采用1600kN·m压实能量加固地基的有效深度约为8m。试验场在5米处进行了2次全压实，在2米处进行了一次低能量压实。强夯法提高了地基的干密度，降低了地基的抗压性和渗透性。标准贯入数均大于7，天然地基中有32.2%的标准贯入数小于5。强夯法加固后的地基能够满足防洪堤防的承载力和沉降量要求。强夯法消除了7度地震的液化倾向。通过动力触探试验和标准触探试验，压实点的等边三角形布置优于正方形布置。
The field detective results and the laboratory testing results are given for the silty soil foundation of the flood-prevention dyke in Yibin strengthened by dynamic compaction method. The field detective data of the strengthened foundation show that the valid strengthened depth is about 8 meters by the 1600kN·m compacted energy. The test site is compacted with 2 times of full compaction at the space of 5 meters and another low energy compaction at the space of 2 meters. The dry densities of the subsoils are increased and the compression and permeability are decreased through dynamic compaction. The standard penetration numbers are all more than 7 while there are 32.2% of the standard penetration numbers less than 5 for the natural subsoils. The subsoils can meet the need of the requirements in bearing capacity and settlements of the flood-prevention dyke after dynamic compaction. The liquefaction tendency at the 7 degrees of earthquake has been disappeared through the dynamic compaction. The equilateral triangle arrangement of the compacting points is better than the square arrangement of the compacting points through the dynamic penetration tests and standard penetration tests.