南海珠江口盆地贝壳砂土力学性质初步研究
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摘要
通过对珠江口盆地广布的贝壳砂的化学组分、粒度组成、形成时代的研究以及对砂土进行直剪试验、高压固结试验、常规三轴剪切试验和动三轴试验，对贝壳砂的土力学性质及动载荷作用下的稳定性作了初步分析，获取了贝壳砂的基本物理力学参数并评价了地震作用下砂土液化的可能性，为海洋工程的设计和施工提供了基本的物理力学参数。
For the special properties of ndnera composition, physical property andsoil structure of shell sand, its mechanical propenies are different from those describedby the classical mechanical theory. Based on the analyhc results of chemicalcomponent, grain size distribuhon, formahon age, and direct shear test .high pressureconsolidation test, triaxial shear test and dynamic tria-xial shear test of shell sand fromthe Zhujiang fover mouth basin in the northern of the South China Sea a preliminarydiscussion on the mechanical propenies of shell sand and the engineering stabilityunder the condition of cyclic loading is provided. The basic mechanical parameters ofshell sand are obtaned and the influence of liquefachon caused by earthquake is alsodiscussed, which provide basic mechanical pararneters for the designing and buildingof marine engineering.
For the special properties of ndnera composition, physical property andsoil structure of shell sand, its mechanical propenies are different from those describedby the classical mechanical theory. Based on the analyhc results of chemicalcomponent, grain size distribuhon, formahon age, and direct shear test .high pressureconsolidation test, triaxial shear test and dynamic tria-xial shear test of shell sand fromthe Zhujiang fover mouth basin in the northern of the South China Sea a preliminarydiscussion on the mechanical propenies of shell sand and the engineering stabilityunder the condition of cyclic loading is provided. The basic mechanical parameters ofshell sand are obtaned and the influence of liquefachon caused by earthquake is alsodiscussed, which provide basic mechanical pararneters for the designing and buildingof marine engineering.
引文
1 Murff J D Pile capacity in calcareous sands: state of the are ASCR Journal of Geotechnical Engineenng favislon, 1987, 113(5):490-507
2杨志强钙质砂（珊瑚砂）的物理力学性质研究．见：南沙群岛及其邻近海区地质地球物理及岛礁（二）。北京：科学出版社，1994。172—180
3 Su GQ, Yang SK, Yang HK et al. A discussion on Quaternary sea level change along the coast of South China. Developments in geoscience. Beijing: Science Press, 1984
4 Liang YB, Lu B, Huang SJ et al. A study of stability of the seafloor foundation on a genlly sloping continental shelf. Marine Geotechnology, 1991, 10: 189-201
5杨位光，温耀霖，余绍襄等．珠江口外浅海区底质物理特性评价．见：南海海洋科学集刊，第11集。北京：科学出版社， 1992， 113—124
6陈俊仁，黄志玮。南海珠江口盆地工程地质分区与评价。工程地质学报，1994，2（2）：18—28
7陈鸣。陆丰13－1平台场地海底稳定性分析与评价．热带海洋，1995，15（2）：40—46
8 Al-Deuri R H, P0ulos H G. Stahc and cyclic direct shear test on carbonate sands. Deotechnical Teshng Journal, GTODJ, l99l, l5 (2): l38-l57
9 Puech A, Becue J P, CoIliat J L. Advances in the design 0f piles driven into non-cemented to weakly cemented carbonate formahons. In: Proceedings, Intemahonal Conference on Ca1careous SedimentS, Perth.1988,305-312
10顾小芸，杨聿容，司桂贤。珠江口盆地卫滩北区域工程地质评价。广州国际海洋工程地质研讨会论文选．北京：地质出版社， 1994
11谷本喜一，野田耕。预测砂层地震液化趋势的统计方法．见：地基与基础译文集（1）：砂土液化。北京：中国建筑工业出版社，1978。54—64
2杨志强钙质砂（珊瑚砂）的物理力学性质研究．见：南沙群岛及其邻近海区地质地球物理及岛礁（二）。北京：科学出版社，1994。172—180
3 Su GQ, Yang SK, Yang HK et al. A discussion on Quaternary sea level change along the coast of South China. Developments in geoscience. Beijing: Science Press, 1984
4 Liang YB, Lu B, Huang SJ et al. A study of stability of the seafloor foundation on a genlly sloping continental shelf. Marine Geotechnology, 1991, 10: 189-201
5杨位光，温耀霖，余绍襄等．珠江口外浅海区底质物理特性评价．见：南海海洋科学集刊，第11集。北京：科学出版社， 1992， 113—124
6陈俊仁，黄志玮。南海珠江口盆地工程地质分区与评价。工程地质学报，1994，2（2）：18—28
7陈鸣。陆丰13－1平台场地海底稳定性分析与评价．热带海洋，1995，15（2）：40—46
8 Al-Deuri R H, P0ulos H G. Stahc and cyclic direct shear test on carbonate sands. Deotechnical Teshng Journal, GTODJ, l99l, l5 (2): l38-l57
9 Puech A, Becue J P, CoIliat J L. Advances in the design 0f piles driven into non-cemented to weakly cemented carbonate formahons. In: Proceedings, Intemahonal Conference on Ca1careous SedimentS, Perth.1988,305-312
10顾小芸，杨聿容，司桂贤。珠江口盆地卫滩北区域工程地质评价。广州国际海洋工程地质研讨会论文选．北京：地质出版社， 1994
11谷本喜一，野田耕。预测砂层地震液化趋势的统计方法．见：地基与基础译文集（1）：砂土液化。北京：中国建筑工业出版社，1978。54—64