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深水防波堤软土地基数值模拟 被引量:3
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作者 葛栋林 徐宾宾 +1 位作者 解林博 潘良鹄 《水运工程》 北大核心 2020年第9期167-172,195,共7页
某深水防波堤为斜坡式结构,水深18~30 m,软土层厚度超过30 m,基础采用部分开挖换填方式,基底保留了10余米原状软土层,地基沉降较大。为准确预计竣工后地基沉降,预留堤顶沉降以满足堤顶高程的设计要求,采用数值方法研究深水防波堤深厚软... 某深水防波堤为斜坡式结构,水深18~30 m,软土层厚度超过30 m,基础采用部分开挖换填方式,基底保留了10余米原状软土层,地基沉降较大。为准确预计竣工后地基沉降,预留堤顶沉降以满足堤顶高程的设计要求,采用数值方法研究深水防波堤深厚软土地基沉降变形和稳定性。在利用施工期水下地基监测获得的大量实测数据验证数值模型真实可信的基础上,模拟防波堤的开挖和抛填施工及长期沉降全过程,得到各典型断面的最终沉降、施工期沉降和竣工后沉降,可为堤顶预留竣工后沉降及后期防波堤维护提供参考。同时,利用该模型进一步复核了防波堤地基的安全稳定性。 展开更多
关键词 深水防波堤 软土地基 水下地基监测 地基数值模拟
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复合地基褥垫层作用的模拟与模型试验的对比 被引量:2
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作者 袁则循 乔京生 郭占峰 《山西建筑》 2006年第21期90-91,共2页
应用ANSYS数值模拟、物理模型试验相结合的方法,对复合地基褥垫层的作用随厚度变化的规律进行了研究,在数值模拟结果的基础上,以物理模型试验对数值模拟的结论加以验证。
关键词 复合地基 褥垫层 数值模拟 模型试验
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Analysis of tunnel face stability with advanced pipes support 被引量:13
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作者 AN Yong-lin ZHOU Jin +1 位作者 OUYANG Peng-bo LI Jia-hao 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第2期604-617,共14页
To keep the tunnel face stable is very important for tunnel construction.In this paper,the tunnel face stability under the advanced pipe was analyzed using the Winkler foundation model and rigid limit equilibrium.The ... To keep the tunnel face stable is very important for tunnel construction.In this paper,the tunnel face stability under the advanced pipe was analyzed using the Winkler foundation model and rigid limit equilibrium.The tunnel face deformation characteristics were also analyzed using the numerical simulation.The influence of parameters on the deflection of the pipe roof and the stability of the tunnel face were discussed.The results show that the tunnel face stability can be improved through increasing the pipe diameter,decreasing the initial displacement at the beginning of the pipe seat,and adopting the short round length and small excavation height.With the increase of tunnel burial depth,the safety factor of tunnel face stability first decreases,then increases,and then remains unchanged.The deformation at the center of the tunnel face is larger than the deformation at the surround sides and at the corner.The horizontal displacement varies little with the increasing of the pipe length.The horizontal displacement at the center of the tunnel face increases with the increase of the pipe ring spacing and the pipe longitudinal spacing.There is an optimum external angle. 展开更多
关键词 tunnel face stability advanced pipe Winkler foundation model numerical simulation
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基础下浅埋洞室安全顶板厚度研究 被引量:19
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作者 陈尚桥 黄润秋 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2000年第z1期961-966,共6页
在参考已有资料的基础上 ,分析了山区城市浅埋地下洞室安全顶板厚度的影响因素。采用有限单元数值模拟法研究了基础与洞室相互作用下的破坏机制 ,以及各影响因素对浅埋地下洞室安全顶板厚度的影响及相关变化规律。并运用逐步线性回归的... 在参考已有资料的基础上 ,分析了山区城市浅埋地下洞室安全顶板厚度的影响因素。采用有限单元数值模拟法研究了基础与洞室相互作用下的破坏机制 ,以及各影响因素对浅埋地下洞室安全顶板厚度的影响及相关变化规律。并运用逐步线性回归的方法得出了一个能综合考虑各影响因素的安全顶板厚度的预测模型。 展开更多
关键词 浅埋洞室 地基 安全顶板厚度 破坏机制 数值模拟 预测模型
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Mitigation of floor heave in West Kentucky Coal Mine 被引量:4
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作者 Perry Kyle Bradley Joel +1 位作者 Unrug Kot Klimek Mark 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第3期521-525,共5页
A West Kentucky mine operation in No. 11 seam encountered floor heave, due to the localized increase in the thickness of the fireclay mine floor. Floor heave has overridden seals installed in two mined out panels. The... A West Kentucky mine operation in No. 11 seam encountered floor heave, due to the localized increase in the thickness of the fireclay mine floor. Floor heave has overridden seals installed in two mined out panels. The third seal's location was planned for isolating that area from the Mains. A plan of support has been developed to prevent repetition of the floor heave and related problems outby the seals. The applied ground control measures were successful. An attempt of a 3D numerical modeling was made; thus, it would match the observed behavior of the mine floor and could be used as a design tool in similar conditions. The paper describes sequence of events, an applied mitigation ground control system, and the first stage of numerical modeling. 展开更多
关键词 Floor heave Presplit Secondary support Modeling
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Centrifugal model test and numerical simulation of vertical earth pressure on soft foundation box culvert 被引量:1
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作者 张军辉 姚永胜 +1 位作者 郑健龙 张涛 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第9期3556-3563,共8页
To obtain the vertical earth pressure on a soft foundation box culvert and investigate the interaction of the soil-culvert-foundation system, both a centrifugal model test and a numerical simulation were conducted and... To obtain the vertical earth pressure on a soft foundation box culvert and investigate the interaction of the soil-culvert-foundation system, both a centrifugal model test and a numerical simulation were conducted and the comparisons with the current methods to determine the load on a culvert were completed. The results of the model test and numerical analysis are in satisfactory agreement, which shows that the direction of the shear stress between the culvert and the adjacent embankment depends on the differential settlement between them. A vertical earth pressure concentration appears on the culvert with a rigid piles foundation because of a downward shear stress. The ratio of the load on a soft foundation culvert and the overburden pressure above the culvert raises first and then decreases as the backfill height increases. In order to reduce the load on a culvert, it is suggested to limit the stiffness difference of the foundations under the culvert and embankment and to use a light backfill over the culvert. 展开更多
关键词 box culvert vertical earth pressure soft foundation centrifugal model test
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Verification of Seismic Performance of Pile Foundation in Composite Ground through Experimental and Numerical Methods
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作者 Tomisawa Koichi Miura Seiichi 《Journal of Civil Engineering and Architecture》 2013年第6期656-669,共14页
A new construction method of pile foundation in composite ground, in which, prior to installing piles, the ground is improved around the heads of the piles in soft ground or ground subject to liquefaction, which is in... A new construction method of pile foundation in composite ground, in which, prior to installing piles, the ground is improved around the heads of the piles in soft ground or ground subject to liquefaction, which is introduced in this paper. This construction method uses a combination of pile foundation construction together with common ground improvement methods, including deep mixing, preloading and sand compaction piling, and it is referred to as the composite ground pile method. Since an artificial ground with relatively high rigidity comparing with that of the original ground was formed around the pile in this method, and the seismic performance has not been made clear, thus the seismic performance of piles in composite ground was systematically analyzed through a series of centrifuge model tests and numerical analyses by using dynamic nonlinear finite element method, and a verification method for the seismic performance of piles in composite ground was proposed on the basis of the experimental and numerical results. 展开更多
关键词 Pile foundation composite ground centrifuge model test dynamic nonlinear finite element method.
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