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Research of deformation prediction method of soft soil deep foundation pit 被引量:7
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作者 麻凤海 郑艳 杨帆 《Journal of Coal Science & Engineering(China)》 2008年第4期637-639,共3页
In view of the characteristics of soft soil deep foundation pit for the construction and geotechnical characteristics of the special medium,it is difficult to calculate theoreti- cally accurately structural deformatio... In view of the characteristics of soft soil deep foundation pit for the construction and geotechnical characteristics of the special medium,it is difficult to calculate theoreti- cally accurately structural deformation of the foundation pit,so in the course of excavation on the construction of the information is particularly important.The analysis and compari- son of several popular non-linear forecasting methods,combined with the actual projects, set up a grey theoretical prediction model,time series forecasting model,improved neural network model to predict deformation of the foundation pit.The results show that the use of neural network to predict with high accuracy solution,it is the foundation deformation prediction effective way in underground works with good prospects. 展开更多
关键词 soft soil deep foundation pit deformation prediction neural network grey theory time series analyses
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Design parameter optimization of beam foundation on soft soil layer with nonlinear finite element 被引量:2
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作者 魏红卫 吴亚中 喻泽红 《Journal of Central South University》 SCIE EI CAS 2012年第6期1753-1763,共11页
Finite element method was performed to investigate the influences of beam stiffness, foundation width and cushion thickness on the beating capacity of beam foundation on underlying weak laminated clay. The comparison ... Finite element method was performed to investigate the influences of beam stiffness, foundation width and cushion thickness on the beating capacity of beam foundation on underlying weak laminated clay. The comparison between numerical results and results from field test including plate-bearing test and foundation settlement observation shows reasonable agreement. According to the numerical results, the beam width, length, cross section and cushion thickness were optimized. The results show that the stresses in subgrade soil decrease greatly with increasing the cushion thickness and width of foundation. However, the foundation settlement and influencing depth of displacement also increase correspondingly under conditions of relatively thinner cushion thickness. For the foundations on underlying weak layer, increasing foundation width merely might be inadequate for improving the bearing capacity, and the appropriate width and cushion thickness depend on the response of subgrade. A comparison between rigid and flexible beams was also discussed. The influence of a flexible beam foundation on subgrade is relatively smaller under the same loading conditions, and the flexible beam foundation appears more adaptable to various subgrades. The proposed flexible beam foundation was adopted in engineering. According to the calculation results, beam width of 2.4 m and cushion thickness of 0.8 m are proposed, and a flexible beam foundation is applied in the optimized design, which is confirmed reasonable by the actual engineering. 展开更多
关键词 beam foundation design optimization soft soil soil-beam interaction nonlinear analysis
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Engineering Geological Zoning of Soft-Soil Foundation Based on Combination Weighting and Extension Methods 被引量:1
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作者 孙明乾 王清 +4 位作者 陈剑平 李严 宋盛渊 鲍硕超 阮云凯 《Journal of Donghua University(English Edition)》 EI CAS 2016年第3期453-461,共9页
Different criteria and factors are used in different methods of soft soil foundation settlement calculation and engineering geological zoning.The methods used are not universally suitable for complex geological enviro... Different criteria and factors are used in different methods of soft soil foundation settlement calculation and engineering geological zoning.The methods used are not universally suitable for complex geological environments.The post-construction settlement of soft soil foundations are especially large and difficult to calculate.In addition,there are many deficiencies in the current methods used for engineering geological zoning.Focusing on the need of establishing engineering geological zoning for areas with soft soil foundations in the Tianjin Marine Economic Area,combination weighting and extension methods were introduced.An evaluation model for the settlement of soft soil foundations was established using multiple factors and large amounts of data.This evaluation model is accurate and objective for delineating engineering geological zoning.These methods eliminate deficiencies by considering both objective and subjective factors,and help obtain an objective and accurate result. 展开更多
关键词 soft soil foundation engineering geological zoning combination weighting method extension method
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Highway Construction of Soft Soil Foundation Processing Analysis
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作者 Zhao Zhao 《Frontiers Research of Architecture and Engineering》 2018年第1期31-33,共3页
Highway is an important channel to connect regional economic development,and is an indispensable part of modern transportation system.In view of the extensive nature of highway cover space and the existence of diversi... Highway is an important channel to connect regional economic development,and is an indispensable part of modern transportation system.In view of the extensive nature of highway cover space and the existence of diversified construction environment,climate and geological influence in highway construction,soft soil foundation is one of the more typical geological forms.With wide distribution in our country,seen as a big difficulty,highway construction technology and directly affect the quality of highway construction,cost,if not properly handled,will cause the soft soil foundation highway engineering structure is not stable,prone to accidents in use.In this paper,we study the treatment of soft soil foundation in highway construction,and put forward some reasonable Suggestions. 展开更多
关键词 HIGHWAY CONSTRUCTION soft soil foundation CONSTRUCTION technology PROCESSING ANALYSIS
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Estimation of Undrained Bearing Capacity for Offshore Soft Foundations with Cyclic Load 被引量:18
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作者 Wang, JH Liu, YF +1 位作者 Xing, Y Di, HM 《China Ocean Engineering》 SCIE EI 1998年第2期213-222,共10页
The degradation strength of soils under cyclic loading is studied and a method for determining the cyclic degradation strength with cyclic triaxial tests is given in the paper. Furthermore, a dum my static method for ... The degradation strength of soils under cyclic loading is studied and a method for determining the cyclic degradation strength with cyclic triaxial tests is given in the paper. Furthermore, a dum my static method for estimating the undrained bearing capacity for offshore soft foundation under wave loads is developed. It can consider the effect of the difference of cyclic stress for different parts of the foundation on both the degradation strength of the foundation soil and the bearing capacity so that the estimated result can better reflect the real condition of foundation under cyclic loading. The method can be applied to plane and space problem. 展开更多
关键词 offshore engineering soft foundation soil dynamics bearing capacity cyclic load
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Pseudo-Static Elasto-Plastic Cyclic Creep Model and Cyclic Stability of Offshore Soft Foundation 被引量:4
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作者 王建华 刘振纹 秦崇仁 《China Ocean Engineering》 SCIE EI 1999年第3期247-256,共10页
The accumulative shear deformation of soft clays under cyclic loads is considered as pseudo-static creep. A pseudo-static elasto-plastic cyclic creep model is developed based on the visco-elasto-plastic theory. The pa... The accumulative shear deformation of soft clays under cyclic loads is considered as pseudo-static creep. A pseudo-static elasto-plastic cyclic creep model is developed based on the visco-elasto-plastic theory. The parameters in the model are determined by cyclic triaxial soil tests. A method for analyzing the stability of offshore soft foundation under wave loads is given by combining the model with pseudo-static creep analysis. An example is analyzed by the method. The results show that the horizontal and vertical stability of foundations under wave loads can be analyzed by it and the analytical results are qualitatively consistent with the observed failure modes of shallow foundations. 展开更多
关键词 cyclic stability of soft foundation soft constitutive cyclic constitutive relation of soft soils offshore engineering soil dynamics
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Time-dependent deviation of bridge pile foundations caused by adjacent large-area surcharge loads in soft soils and its preventive measures
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作者 Shuanglong LI Limin WEI +4 位作者 Jingtai NIU Zhiping DENG Bangbin WU Wuwen QIAN Feifei HE 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2024年第2期184-201,共18页
Time-dependent characteristics(TDCs)have been neglected in most previous studies investigating the deviation mechanisms of bridge pile foundations and evaluating the effectiveness of preventive measures.In this study,... Time-dependent characteristics(TDCs)have been neglected in most previous studies investigating the deviation mechanisms of bridge pile foundations and evaluating the effectiveness of preventive measures.In this study,the stress-strain-time characteristics of soft soils were illustrated by consolidation-creep tests based on a typical engineering case.An extended Koppejan model was developed and then embedded in a finite element(FE)model via a user-material subroutine(UMAT).Based on the validated FE model,the time-dependent deformation mechanism of the pile foundation was revealed,and the preventive effect of applying micropiles and stress-release holes to control the deviation was investigated.The results show that the calculated maximum lateral displacement of the cap differs from the measured one by 6.5%,indicating that the derived extended Koppejan model reproduced the deviation process of the bridge cap-pile foundation with time.The additional load acting on the pile side caused by soil lateral deformation was mainly concentrated within the soft soil layer and increased with the increase in load duration.Compared with t=3 d(where t is surcharge time),the maximum lateral additional pressure acting on Pile 2#increased by approximately 47.0%at t=224 d.For bridge pile foundation deviation in deep soft soils,stress-release holes can provide better prevention compared to micropiles and are therefore recommended. 展开更多
关键词 bridge pile foundation surcharge load soft soil time-dependent deformation interaction mechanism preventive measure
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Review of research on high-speed railway subgrade settlement in soft soil area 被引量:12
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作者 Shunhua Zhou Binglong Wang Yao Shan 《Railway Engineering Science》 2020年第2期129-145,共17页
Construction issues of high-speed rail infrastructures have been increasingly concerned worldwide,of which the subgrade settlement in soft soil area becomes a particularly critical problem.Due to the high compressibil... Construction issues of high-speed rail infrastructures have been increasingly concerned worldwide,of which the subgrade settlement in soft soil area becomes a particularly critical problem.Due to the high compressibility and low permeability of soft soil,the post-construction settlement of the subgrade is extremely difficult to control in these regions,which seriously threatens the operation safety of high-speed trains.In this work,the significant issues of high-speed railway subgrades in soft soil regions are discussed.The theoretical and experimental studies on foundation treatment methods for ballasted and ballastless tracks are reviewed.The settlement evolution and the settlement control effect of different treatment methods are highlighted.Control technologies of subgrade differential settlement are subsequently briefly presented.Settlement calculation algorithms of foundations reinforced by different treatment methods are discussed in detail.The defects of existing prediction methods and the challenges faced in their practical applications are analyzed.Furthermore,the guidance on future improvement in control theories and technologies of subgrade settlement for high-speed railway lines and the corresponding challenges are provided. 展开更多
关键词 High-speed railway SUBGRADE soft soil foundation Pile-supported embankment soil arching Settlement prediction
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Settlement Mode Analysis for An Immersed Tube Tunnel Considering A Nonuniform Foundation Under Tidal Load 被引量:3
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作者 WANG Yan-ning ZHOU Huan-zhu WANG Le-chen 《China Ocean Engineering》 SCIE EI CSCD 2022年第3期427-438,共12页
Immersed tube tunnels are usually placed on soft soil layers in cross-sea tunnelling engineering.Owing to the influence of stratum conditions and slope design,the longitudinal distribution of substratum layers is gene... Immersed tube tunnels are usually placed on soft soil layers in cross-sea tunnelling engineering.Owing to the influence of stratum conditions and slope design,the longitudinal distribution of substratum layers is generally uneven.Thus,the inhomogeneous deformation of the element-joint becomes the key factor in the failure of the immersed tube tun-nel.Therefore,a corresponding calculation method for joint deformation is needed to explore the deformation law of immersed tube tunnels.By constructing a three-section immersed tube tunnel analysis model(TTM),the relationship between the two types of deformation of the immersed tube tunnel structure in a longitudinal nonuniform soft soil foundation is described,and the deformation characteristics of the immersed structure under different boundaries are discussed.Based on the mechanical behaviour of the joint and foundation,according to the Timoshenko beam on the Vlasov two-parameter foundation(VTM),considering the tidal cyclic load during the operation and maintenance period,an example analysis is given.Moreover,the deformation characteristics and development trend of the immersed tube tunnel under the influence of different soil layers are discussed.The obtained results have a certain guiding significance for the deformation calculation of immersed tube tunnels. 展开更多
关键词 geotechnical engineering immersed tube tunnel theoretical analysis soft soil foundation element-soil interaction
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Characteristic Test Study on Bearing Capacity of Suction Caisson Foundation Under Vertical Load 被引量:3
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作者 DAI Guo-liang ZHU Wen-bo +2 位作者 ZHAI qian GONG wei-ming ZHAO Xue-liang 《China Ocean Engineering》 SCIE EI CSCD 2020年第2期267-278,共12页
Suction caisson foundations are often subjected to vertical uplift loads,but there are still no wide and spread engineering specifications on design and calculation method for uplift bearing capacity of suction caisso... Suction caisson foundations are often subjected to vertical uplift loads,but there are still no wide and spread engineering specifications on design and calculation method for uplift bearing capacity of suction caisson foundation.So it is important to establish an uplift failure criterion.In order to study the uplift bearing mechanism and failure mode of suction caisson foundation,a series of model tests were carried out considering the effects of aspect ratio,soil permeability and loading mode.Test results indicate that the residual negative pressure at the top of caisson is beneficial to enhance uplift bearing capacity.The smaller the permeability coefficient is,the higher the residual negative pressure will be.And the residual negative pressure is approximately equal to the water head that causes seepage in the caisson.When the load reaches the ultimate bearing capacity,both the top and bottom negative pressures are smaller than Su and both the top and bottom reverse bearing capacity factors are smaller than 1.0 in soft clay.Combined the uplift bearing characteristics of caisson in sandy soil and soft clay,the bearing capacity composition and the calculation method are proposed.It can provide a reference for the engineering design of suction caisson foundation under vertical load. 展开更多
关键词 suction caisson foundation uplift bearing capacity failure mode negative pressure sandy soil soft clay
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A 3D Numerical Simulation of Sand Drain Element in the Soft Soil of Guangzhou-Zhujiang Highway,China
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作者 W.O.Balogun G.Habiyaremye 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期240-240,共1页
The behavior of sand drain was estimated so that the size of very large load-pressure could be eliminated by changing the configuration of the sand drain elements into sand wall.A 3D mathematical model was formulated ... The behavior of sand drain was estimated so that the size of very large load-pressure could be eliminated by changing the configuration of the sand drain elements into sand wall.A 3D mathematical model was formulated to transform the configuration of a sand drain into a sand wall to minimize or eliminate the excessive stress and primary settlement on the road base.This was barely considered in the past. According to soil mechanics theory and seepage characteristics of sand drain in road base foundations, a 3D sand drain element in FEM format was generated,and a matrix expression was formulated which was introduced into 3D Biot Consolidation 展开更多
关键词 SAND DRAIN ELEMENT 3D Biot FEM soft soil foundation Abaqus Guangzhou-Zhujiang
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软土地区基坑前排倾斜双排桩支护现场试验及工作机理 被引量:3
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作者 郑刚 王玉萍 +3 位作者 程雪松 余地华 黄晓程 李昕昊 《长江科学院院报》 CSCD 北大核心 2024年第6期98-105,113,共9页
基坑倾斜桩支护大幅提高了无支撑支护结构的适用深度,具有造价低、施工便捷、绿色低碳、变形控制好等特点,然而目前研究多集中在单排倾斜桩,对前排倾斜双排桩支护的试验、理论与应用的研究均较少。针对前排倾斜双排桩支护基坑开展了现... 基坑倾斜桩支护大幅提高了无支撑支护结构的适用深度,具有造价低、施工便捷、绿色低碳、变形控制好等特点,然而目前研究多集中在单排倾斜桩,对前排倾斜双排桩支护的试验、理论与应用的研究均较少。针对前排倾斜双排桩支护基坑开展了现场试验,同时采用有限元方法分别从前排斜桩、桩顶连梁及桩间土体作用3个方面深入探究了前排倾斜双排桩支护的工作机理,进一步分析了直斜桩长度和排距对前排倾斜双排桩支护结构受力变形性能的影响。结果表明,相比传统竖直双排桩,前排倾斜双排桩支护结构的支护性能显著提升,前排斜桩主要发挥“斜撑”作用,连梁主要起到将直斜桩及冠梁连接成一个空间刚架的作用,桩间土体能够提高桩土摩阻力,进而有效减小前排倾斜双排桩变形。研究成果有助于前排倾斜双排桩的推广和应用。 展开更多
关键词 基坑 前排倾斜双排桩 现场试验 工作机理 软土地区
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开挖顺序及内支撑早期刚度对软土基坑稳定性影响规律 被引量:1
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作者 管大刚 胡志明 +3 位作者 郑鹏鹏 袁山 陈保国 张艳林 《建筑科学与工程学报》 CAS 北大核心 2024年第2期181-190,共10页
深基坑开挖变形控制是软土基坑工程的难题,工程中常采用密集的混凝土内支撑来提高支撑刚度,然而实际工程中未能合理考虑软土深基坑的开挖顺序和混凝土内支撑早期刚度影响,往往导致基坑实际变形远大于设计值。结合珠三角水资源配置工程... 深基坑开挖变形控制是软土基坑工程的难题,工程中常采用密集的混凝土内支撑来提高支撑刚度,然而实际工程中未能合理考虑软土深基坑的开挖顺序和混凝土内支撑早期刚度影响,往往导致基坑实际变形远大于设计值。结合珠三角水资源配置工程的软土深基坑,利用验证后的数值模拟方法研究了不同开挖顺序及混凝土内支撑早期刚度对基坑受力和变形特性的影响规律,得出了分层分区非对称开挖和对称开挖对地连墙水平位移和地表沉降的影响规律。结果表明:尽管非对称开挖会造成基坑两侧的地连墙位移和地表沉降差异,但是密集内支撑条件下非对称开挖比对称开挖对于基坑周围地表沉降和地连墙水平位移影响更小并能够大量节约工期;受混凝土内支撑早期刚度影响,施作内支撑后越早进入下一步开挖,地连墙水平位移和周围地表沉降越大;考虑内支撑早期刚度影响时基坑上部的内支撑轴力会增大,而下部的内支撑轴力会减小,早期刚度越小,这种趋势越明显;现场施工时难以实时动态监测混凝土的弹性模量,极易造成内支撑轴力的早期监测数据失真,甚至给工程带来错误决策。 展开更多
关键词 深基坑 软土 开挖顺序 混凝土内支撑 早期刚度 变形特性
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软土地层临近地铁基坑施工影响控制研究 被引量:1
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作者 李家平 雷丹 +2 位作者 杨石飞 袁钊 成顺博 《工程勘察》 2024年第4期7-12,共6页
随着城市地铁沿线地下空间的持续开发,基坑施工对临近地铁变形影响控制越来越受到关注。以上海某邻近地铁的基坑工程为例,通过实测分析和数值计算的方法研究了基坑开挖和拆撑对临近隧道变形的影响,并对伺服系统控制临近隧道变形进行定... 随着城市地铁沿线地下空间的持续开发,基坑施工对临近地铁变形影响控制越来越受到关注。以上海某邻近地铁的基坑工程为例,通过实测分析和数值计算的方法研究了基坑开挖和拆撑对临近隧道变形的影响,并对伺服系统控制临近隧道变形进行定量分析。结果表明:覆存于软土地层中的隧道对临近施工扰动非常敏感,尽管大区基坑与隧道间距超过2.5倍开挖深度,隧道变形仍超过了监护要求的控制值;大区地下结构施工时拆撑对隧道收敛变形影响超过开挖影响的50%;应力伺服支撑系统对控制临近隧道变形比较有效,适当的“负位移”可以对隧道变形产生有利效果。 展开更多
关键词 软土地层 基坑开挖 伺服系统 隧道变形
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上软下硬黏土中四筒基础抗倾覆承载特性研究
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作者 练继建 曹政 +1 位作者 杨旭 黎慧珊 《海洋工程》 CSCD 北大核心 2024年第1期1-10,共10页
随着海上风电向深远海发展,四筒基础发展潜力巨大。中国大多数海域存在较厚的上覆软土层,对基础抗倾覆承载能力有着重大影响。采用有限元软件ABAQUS建立上软下硬分层黏土模型,对四筒基础在单向水平荷载和弯矩荷载作用下的承载力特性进... 随着海上风电向深远海发展,四筒基础发展潜力巨大。中国大多数海域存在较厚的上覆软土层,对基础抗倾覆承载能力有着重大影响。采用有限元软件ABAQUS建立上软下硬分层黏土模型,对四筒基础在单向水平荷载和弯矩荷载作用下的承载力特性进行研究。研究结果表明:四筒基础在水平、弯矩荷载作用下主要运动模式为转动,对边加载时,转动轴靠近受压筒且随着软土层厚度增加不断靠近四筒基础平面中心,但变化幅度较小;水平和弯矩极限承载力对于不同的筒间距和长径比具有相同的变化趋势,当软土层厚度h/筒高L≤3/4时,水平和弯矩承载力随着软土层厚度的增加近似线性降低,当h/L>3/4后,承载力降低速率明显减小。 展开更多
关键词 海上风电 四筒基础 表层软土 旋转中心 承载能力
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基坑中软土的水平抗力系数几种确定方法探讨 被引量:1
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作者 陈富强 杨光华 廖汉阳 《广东水利水电》 2024年第6期7-11,23,共6页
该文围绕基坑中软土的的水平抗力系数的确定方法开展了探讨,分析了基坑规程中土的水平反力系数的比例系数m值的来源,分析了水平抗力系数确定的理论,罗列了现行规范中软土的水平抗力系数的经验值,最后通过案例分析,将3种土的水平抗力系... 该文围绕基坑中软土的的水平抗力系数的确定方法开展了探讨,分析了基坑规程中土的水平反力系数的比例系数m值的来源,分析了水平抗力系数确定的理论,罗列了现行规范中软土的水平抗力系数的经验值,最后通过案例分析,将3种土的水平抗力系数的计算方法(m值、k值和c值)的计算结果与实测进行了比较,发现按目前基坑规程公式计算的软土的水平反力系数的比例系数m值偏小的现象。 展开更多
关键词 基坑工程 软土 土的水平抗力 土的水平反力系数的比例系数 计算方法
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长期堆载预压处理软土地基效果评价
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作者 汪智慧 辛全明 +4 位作者 孔志军 蔡奇鹏 佘小康 曹洋 涂兵雄 《华侨大学学报(自然科学版)》 CAS 2024年第2期241-247,共7页
为评估某园区10 a长期堆载预压后,场地后续沉降对拟建管线的影响,通过室内试验和现场试验对堆载预压处理后的场地进行系统评价,分别采用双曲线法与有限元法对后续沉降进行预测。结果表明:场地堆载预压10 a后各地层物理力学参数明显改善... 为评估某园区10 a长期堆载预压后,场地后续沉降对拟建管线的影响,通过室内试验和现场试验对堆载预压处理后的场地进行系统评价,分别采用双曲线法与有限元法对后续沉降进行预测。结果表明:场地堆载预压10 a后各地层物理力学参数明显改善,但其中淤泥层性质相对较差,是场地后续沉降发生的主要地层;经过10 a堆载,场地主固结沉降基本完成,固结度达到95.5%,说明长期堆载预压效果较好;对于堆载多年后的场地,在进行后续沉降数值计算时,采用弹性模型并选用现场试验获得的参数进行计算,计算结果与实测数据较好吻合,场地剩余平均沉降量在15.4 cm左右;园区道路管线可采取常规预防措施。 展开更多
关键词 长期堆载预压 固结沉降 软土地基 有限元法 双曲线法
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软土区堆载对桥梁桩基偏位影响及纠偏措施
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作者 唐钱龙 李双龙 +1 位作者 魏丽敏 李正亮 《土木与环境工程学报(中英文)》 CSCD 北大核心 2024年第6期126-134,共9页
软土区过大堆载将造成邻近桥梁桩基产生明显偏位,对桥梁安全服役极为不利。结合某堆载致软土区桥墩偏移工程案例,考虑软土侧向变形时效性特征,开发软土固结-蠕变材料模型子程序,建立堆载-桩基-桥墩有限元模型,研究堆载作用下软土区桥墩... 软土区过大堆载将造成邻近桥梁桩基产生明显偏位,对桥梁安全服役极为不利。结合某堆载致软土区桥墩偏移工程案例,考虑软土侧向变形时效性特征,开发软土固结-蠕变材料模型子程序,建立堆载-桩基-桥墩有限元模型,研究堆载作用下软土区桥墩-承台-桩基结构的时效性偏移特性,揭示桥墩-承台-桩基结构横向偏移机理,并针对现场条件提出有效合理纠偏措施。结果表明:随着堆载时间的延长,桩身响应沿深度分布发生显著变化,且堆载引发的软土时效性横向变形致使作用于桩侧的横向附加压力逐渐增大,但其沿深度的分布范围基本不变,并且主要分布在软弱土层深度范围内;基于桩身截面承载极限弯矩的评估,所研究桥墩各桩基仍处于安全状态,但应注意承台与桩基连接处以及软弱层与硬土层界面处的弯矩;提出的卸载+高压旋喷桩加固纠偏措施可以达到预期纠偏效果。 展开更多
关键词 堆载 桥梁桩基 软土 横向偏移 纠偏措施
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河谷区多层软土地基强夯处治分析 被引量:1
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作者 周静 《北方交通》 2024年第4期75-78,82,共5页
文章依托高速公路多层软土地基强夯处治项目,在施工现场选取具有代表性的监测断面开展现场监测,检验河谷区多层软土地基强夯处治效果。由监测数据得出,在强夯处治和路基填筑施工阶段,地基分层沉降、土压力、孔隙水压力和侧向位移增幅均... 文章依托高速公路多层软土地基强夯处治项目,在施工现场选取具有代表性的监测断面开展现场监测,检验河谷区多层软土地基强夯处治效果。由监测数据得出,在强夯处治和路基填筑施工阶段,地基分层沉降、土压力、孔隙水压力和侧向位移增幅均较大,工后逐渐趋于稳定,可说明强夯处治后软基承载力得到有效提升,路基整体结构稳定,加固效果良好。 展开更多
关键词 河谷区 软土地基 强夯处治 分层沉降 侧向位移
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格栅式钢板桩与桩筏基础集成的基坑支护技术
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作者 朱张峰 马福建 +3 位作者 陈俊杰 于登合 徐海朕 张宝谦 《施工技术(中英文)》 CAS 2024年第15期31-36,共6页
针对软土地质基坑工程,提出格栅式钢板桩与桩筏基础集成的基坑支护技术,通过设置纵向双排钢板桩与横向钢板桩或钢板组成格栅式钢板桩,以提高支护结构强度与刚度,并与桩筏基础协同工作,以解决结构下部软土层承载力较差的问题,并提高支护... 针对软土地质基坑工程,提出格栅式钢板桩与桩筏基础集成的基坑支护技术,通过设置纵向双排钢板桩与横向钢板桩或钢板组成格栅式钢板桩,以提高支护结构强度与刚度,并与桩筏基础协同工作,以解决结构下部软土层承载力较差的问题,并提高支护结构稳定性。以某管廊工程为依托,通过计算分析与技术对比,论证集成支护技术的安全性与可行性。 展开更多
关键词 基坑 软土 钢板桩 桩筏基础 支护
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