共查询到17条相似文献,搜索用时 109 毫秒
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在内河船闸工程主体基坑开挖施工中,基坑的止水防渗是非常重要的关键环节,在一定程度上决定了工程能否顺利实施。以新建韩庄复线船闸主体基坑地连墙防渗工程为研究对象,对地连墙防渗技术的施工流程、主要施工方法等进行研究,通过实际施工验证,证明地连墙技术在内河船闸工程主体基坑防渗中的应用是可行的,且具有显著效果。 相似文献
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文章以长洲三、四线船闸工程为例,利用空间三维实体有限元模型,计算分析了不同工况下船闸高闸墙结构的位移及应力分布情况,计算结果可为闸墙结构的优化设计提供依据。 相似文献
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长洲水利枢纽三线四线船闸受地形地质条件的制约,共用中间闸室墙,其结构形式和受力条件复杂,采用传统的结构力学方法无法进行精确计算。文章采用有限元方法,建立三维实体有限元模型对长洲三四线船闸中间闸室墙进行了计算分析,得出了不同工况下的中间闸室墙结构的位移及应力分布情况。 相似文献
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深基坑支护设计,不仅要保证基坑内的正常作业,而且要防止基坑及坑外土体的移动,确保基坑附近建筑物、道路、管线等的正常使用.因此,深基坑围护结构的安全性显得尤为重要.在众多围护方法中,SMW工法(型钢水泥土搅拌墙)以其适用性强、围护成本低、施工周期短而倍受关注.文章结合工程实践,对大直径SMW工法在软土地基深基坑支护中的支护结构设计及施工要点及难点进行了分析和探讨. 相似文献
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针对支撑刚度、围护墙体刚度及地基加固等不同技术条件的基坑支护方案进行内力计算,并对各个方案下的结构受力进行分析比较,从而提出不同环境条件下支护体系的设计方案。 相似文献
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文章结合既有工程,详细介绍了格栅式连续墙护岸的设计过程,并采用有限元数值法对格栅式连续墙的受力机理进行了分析。通过计算数据和监测数据的比较,证明推断出的计算方法和采用明挖顺作小基坑、焊接连接接头的方案是合理可行的。 相似文献
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那吉航运枢纽船闸闸室结构采用整体式坞工结构,闸墙内设有长廊道充泄水系统。为充分了解闸室结构内部和地基内的应力分布情况,文章采用平面应变力学模型,利用Midas大型通用软件对该闸室坞工结构进行了强度计算分析,并根据计算结果提出了优化调整方案,使地基应力和结构强度符合要求,达到了确保结构安全的目的。 相似文献
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Liu Z.Zhou Q.Lou Y. 《现代隧道技术》2018,(3):81-91
With the development of urban metro systems, the influence of foundation pit construction on metro fa-cilities and related protection measures are getting more and more attention. A technical program for metro assess-ment at different phases of foundation pit construction is proposed using the statistics and analysis of a foundation pit of the Hangzhou metro. Qualitative and quantitative methods for analyzing the influence that foundation pit exca-vation has on metro systems are studied, and a series of protective measures suitable for foundation pit construction are summarized. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved. 相似文献
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Hou X.Yuan J.Lin Y. 《现代隧道技术》2018,(6):87-93
Adopting Hardening-Soil finite element model based on soil unloading conditions, the influence of external wall insertion ratio on deformation of retaining structure and soil was studied taking the foundation pit of a metro transfer station of Suzhou metro line 1 as background. The results show that the maximum lateral displace- ment of external wall decreases with an increase of insertion ratio within the range of 30-35 mm, and the lateral de- formation at the foot of wall increases significantly in a linear form; the lateral deformation at the top of internal wall obviously increases linearly, while the maximum of lateral wall deformation of wall body increases slowly and there is almost no change at the bottom of wall; the uplift at the internal pit bottom is more than 90 mm and it is slightly effected by the insertion ration of external wall while the uplift at the external pit bottom is more than 70 mm and it increases with an decrease of the distance away from the external wall; soil mass settlement at the back of the exter- nal pit is obvious and it decreases with an increases of insertion ratio of external wall within the range 14 m away from the external wall, and the settlement reaches the maximum when the insertion ratio of external wall is 0.25 while the tendency of settlement develops reversely when the distance from the external wall is beyond 14 m. To en- sure the safety and reduce environmental impact, it is significant to determine a reasonable insertion ratio of exter- nal wall regarding the pit-in-pit excavation. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved. 相似文献
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通过上海交通大学海洋深水试验池超深基坑(Ф5m、深39m)工程的实践,介绍了地下连续墙施工、井内土方开挖、水下封底混凝土、降压井降水、内衬结构回筑等施工技术,提出施工中一些需注意的关键技术问题,为以后类似工程提供借鉴。 相似文献