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黄土丘陵沟壑区挖填造地工程勘察的探索与实践
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作者 梁谊 于永堂 唐浩 《西北水电》 2024年第4期109-115,共7页
黄土丘陵沟壑区挖填造地工程会遇到众多岩土工程问题。为保证类似工程建设的安全,避免相关工程事故的发生,依托某黄土丘陵沟壑区挖填造地工程实践,归纳了挖填造地工程前原场地勘察要点、研究方法和评价思路,分析了黄土丘陵沟壑区挖填造... 黄土丘陵沟壑区挖填造地工程会遇到众多岩土工程问题。为保证类似工程建设的安全,避免相关工程事故的发生,依托某黄土丘陵沟壑区挖填造地工程实践,归纳了挖填造地工程前原场地勘察要点、研究方法和评价思路,分析了黄土丘陵沟壑区挖填造地工程面临的主要工程地质问题,并给出了建议措施。结果表明:填方区勘察重点为湿陷性黄土和其它覆盖土层的分布以及在高压力条件下工程性质,挖方区勘察重点为土石材料工程性质和土石比;主要工程地质问题涉及地下水环境变化及其对工程的影响、高填方场地沉降与不均匀沉降、填挖边坡稳定性、湿陷性黄土地基增湿变形、软弱淤积土地基问题、不良地质作用等。 展开更多
关键词 黄土 丘陵沟壑区 填造地工程 工程地质问题 原场地勘察
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机械抢险在崔家控导工程中的应用
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作者 张玉初 张月明 《水利建设与管理》 2000年第3期19-19,共1页
一、险情情况 1994年汛前修建的崔家控导工程~#20和~#21坝,坝顶宽15m,坝长120m,坝长占据了河面宽度的78%,过水断面宽度只剩下原河面宽的22%,宽度70m。~#20与~#21坝档距100m,~#21与~#22坝档距136m,连坝顶宽25m,坝基础为按4、3、2排列的... 一、险情情况 1994年汛前修建的崔家控导工程~#20和~#21坝,坝顶宽15m,坝长120m,坝长占据了河面宽度的78%,过水断面宽度只剩下原河面宽的22%,宽度70m。~#20与~#21坝档距100m,~#21与~#22坝档距136m,连坝顶宽25m,坝基础为按4、3、2排列的柳石枕,柳石枕直径为1m。工程完成后,7月24日2时,洪水到达崔家护滩控导工程,当日凌晨5时,控导工程以上水位10.03m,相当于大河3000m^2/s水位(当日8时,利津站实测流量1220m^3/s)。由于溜急,淘刷严重,两段新坝圆头至迎水面长80m、出水高1.5m的坝身在几分钟内墩蛰入水,主流直冲土坝基,有垮坝的危险。 展开更多
关键词 机械化抢险 挖地工程 崔家护滩 黄河险工 大坝
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High Slope Stability of Diversion Power System Intake of Jinchuan Hydropower Station 被引量:1
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作者 TANG Liang-qin TANG Kui +2 位作者 NIE De-xin WANG Jun-jie LIU Dong-yan 《Journal of Mountain Science》 SCIE CSCD 2013年第6期1109-1117,共9页
The excavated height of the left bank slope of the diversion power system intake in Jinchuan hydropower station is about 16o m. The stability and safety of the slope during construction and its operation/utilization b... The excavated height of the left bank slope of the diversion power system intake in Jinchuan hydropower station is about 16o m. The stability and safety of the slope during construction and its operation/utilization become one of the most important geological engineering problems. At the same time, it is also crucial to select a safe and economic excavation gradient for the construction. We studied the problem of how to select a safe and economic slope ratio by analyzing the geological condition of the high slope, including the lithology, slope structure, structural surface and their combinations, rock weathering and unloading, hydrology, and the natural gradient. The study results showed that the use of an excavation gradient larger than the gradient observed during site investigation and the gradient recommended in standards and field practice manuals is feasible. Then, we used the finite element method and rigid limit equilibrium method to evaluate the stability of the excavation slope under natural, rainstorm and earthquake conditions. The calculated results showed that the excavated slope only has limited failure, but its stability is greatly satisfactory. The research findings can be useful in excavation and slope stabilization projects. 展开更多
关键词 Jinchuan Hydropower Station Highslope Excavation slope ratio STABILITY
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Research on pore microstructure features for dredger fill based on mercury intrusion method
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作者 SUN Mingqian WANG Qing +1 位作者 YAN Huan SONG Shengyuan 《Global Geology》 2013年第1期48-53,共6页
The material composition and microstructure have a comprehensive influence on geological engineering properties of dredger fill.The porosity of the dredger fill is an important characteristic of microscopic structure.... The material composition and microstructure have a comprehensive influence on geological engineering properties of dredger fill.The porosity of the dredger fill is an important characteristic of microscopic structure.Taken dredger fill from Binhai New Area in Tianjin as research object,the distribution trend of pore is obtained by granularmetric analysis,mineral composition analysis and mercury intrusion method.By discussing the variation regulation of dredger fill in two different kinds of processing methods,certain theoretical basis is provided for evaluating the engineering geological properties of dredger fill.It can be concluded from the test results that after drainage treatment,the porosity decreased and the structure unit changed from the relatively loose state to aggregate state.In certain depth range,the consolidation effect of dredger fill with drainage treatment is better than that without drainage treatment. 展开更多
关键词 dredger fill MICROSTRUCTURE CHARACTERISTICS mercury intrusion method
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