大顶子山工程土坝段砂土振动液化判别的新思路
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摘要
松花江干流大顶子山航电枢纽工程位于黑龙江省松花江干流哈尔滨市以东约46 km处,土坝段位于左岸,长度为1991.42 m。该工程抗震设防烈度为Ⅵ度,但规范中没有设防烈度为Ⅵ度的评价标准,评价是按设防烈度为Ⅶ度的标准进行的,评价结果偏于保守且工程处理费用较高。为进一步论证该工程土坝段按Ⅶ度的评价标准的液化情况,对该坝段进行实地勘察,进行综合分析与合理评价。
Dadingzishan Hydro-power Junction Engineering is located at about 46km east of Harbin city on Songhuajiang trunk stream.The earth dam section is on the left bank,having a length of 1991.42m.The anti-seismic intensity of this engineering is designed to be degree VI,but there isn't an evaluation standard for degree VI anti-seismic intensity in the code,thus the evaluation was conducted according to that for degree VII,the evaluation result of which tended conservative and the engineering cost was high.For the purpose of further demonstrating the state of liquefaction of earth dam section of this project according to degree VII's evaluation standard,we carried out site exploration and gave a comprehensive analysis and reasonable evaluation.
Dadingzishan Hydro-power Junction Engineering is located at about 46km east of Harbin city on Songhuajiang trunk stream.The earth dam section is on the left bank,having a length of 1991.42m.The anti-seismic intensity of this engineering is designed to be degree VI,but there isn't an evaluation standard for degree VI anti-seismic intensity in the code,thus the evaluation was conducted according to that for degree VII,the evaluation result of which tended conservative and the engineering cost was high.For the purpose of further demonstrating the state of liquefaction of earth dam section of this project according to degree VII's evaluation standard,we carried out site exploration and gave a comprehensive analysis and reasonable evaluation.
引文
[1]中水东北勘测设计研究有限责任公司.大顶子山航电枢纽工程初步设计报告[R].长春:中水东北勘测设计研究有限责任公司,2004.
[2]中水东北勘测设计研究有限责任公司.大顶子山航电枢纽工程土坝坝基砂土地震液化专题研究报告[R].长春:中水东壮勘测设计研究有限责任公司,2005.
[3]JTJ 004—89,公路工程抗震设计规范[S].
[4]GB50287—99,水利水电工程地质勘察规范[S].
[5]杨恒华.地基土液化基理分析及液化评价方法评述[J].广西水利水电,1998(4):62-64.
[6]邓荣贵,张倬元,刘宏.饱和砂土动力液化到渗流液化过程探讨[J].山地学报,2001,19(5):430-435.
[2]中水东北勘测设计研究有限责任公司.大顶子山航电枢纽工程土坝坝基砂土地震液化专题研究报告[R].长春:中水东壮勘测设计研究有限责任公司,2005.
[3]JTJ 004—89,公路工程抗震设计规范[S].
[4]GB50287—99,水利水电工程地质勘察规范[S].
[5]杨恒华.地基土液化基理分析及液化评价方法评述[J].广西水利水电,1998(4):62-64.
[6]邓荣贵,张倬元,刘宏.饱和砂土动力液化到渗流液化过程探讨[J].山地学报,2001,19(5):430-435.
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