强夯砂土地基锥尖阻力分布规律及施工参数选择*
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广东省交通运输厅科技项目(科技-2016-02-018)、广州市珠江科技新星专项资助项目(201806010164)、国家重点研发计划专项资助项目(2017YFC0805303)


Distribution regularities of cone penetration resistance in dynamic compaction sandy soil foundation and selection of construction parameters
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    摘要:

    为探究强夯砂土地基锥尖阻力分布规律,采用静力触探试验方法对22个吹填区进行试验研究。发现以下分布规律:1)强夯砂土地基下锥尖阻力在1 m深度范围内基本呈线性分布;2)对于吹填厚度约为11 m的区域,在1~6 m范围内会出现峰值,6~10 m范围内锥尖阻力有所下降,10 m深度以下由于接近海床高程的砾砂层锥尖阻力再次增大;3)对于吹填厚度约为6 m的区域,在1~4 m范围内锥尖阻力会达到峰值,4~6 m范围内锥尖阻力有所下降,6 m深度以下由于接近海床高程的砾砂层锥尖阻力再次增大。通过试验结果计算承载力和总沉降量,并以此检验施工参数选取的合理性。

    Abstract:

    In order to study the distribution of cone penetration resistance of dynamic compacted sand soil foundation,22 hydraulic reclamation areas were tested by static penetration test.The following distribution rules were found:1)Under the dynamic compaction sand soil foundation,the cone penetration resistance was basically linear within the depth range of 1 m. 2)For the area with a thickness of about 11 m,there would be a peak within the range of 1~6 m,and the cone penetration resistance would decrease within the range of 6~10 m,further the cone penetration resistance of gravel sand layer closing to the seabed elevation would increase again below 10 m. 3)For the area with a thickness of about 6 m,the cone penetration resistance of gravel sand layer closing to the seabed elevation would increase again;in the range of 1~4 m,the tip resistance would reach the peak value,and in the range of 4~6 m,the tip resistance would decrease,further in the depth of 6 m,the tip resistance of gravel sand layer closing to the seabed elevation would increase again.Through the test results,the bearing capacity and total settlement were calculated,and the rationality of construction parameters selection was verified.

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陈明杰,桑登峰,蔡智生,等.强夯砂土地基锥尖阻力分布规律及施工参数选择*[J].水运工程,2020(1):137-143.

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  • 在线发布日期: 2020-01-13
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