粉喷桩配合土工格栅处理软土路基的施工方法

粉喷桩配合土工格栅处理软土路基属一种软土地基的特殊加固方式,在对软土地区进行粉喷桩配合土工格栅处理软土路基加固时必须严格进行控制,否则极易留下质量隐患。本文主要介绍武吉高速公路D4标段软土土路基粉喷桩配合土工格栅处理软土路基的施工情况．可供以后施工软土路基粉喷桩配合土工格栅处理软土路基时借鉴。     

公路桥梁工程中软土地基施工技术分析

软土路基由于其物理特性容易变形对建筑物危害比较大,提出了根据软土成因和厚度不同可以采用换填土处理,管桩加固、密实加固法等不同施工方法进行软土地基施工,从而提高地基强度确保公路桥梁的施工质量。     

粉喷桩加固既有线旁软土地基技术

针对在既有铁路路基旁软土地基上新建路基会对既有路基产生牵引沉降的问题,通过京广铁路武昌至武昌南增建三、四线工程粉喷桩处理软土地基的成功实践,介绍了粉喷桩加固软基的施工要点、加固效果和各种检测手段,并通过与其他几种加固方法的比较,得出粉喷桩加固软土地基有广泛的应用前景。     

PHC管桩在铁路软基中的应用

为了保证高强预应力管桩(PHC管桩)施工质量,确保PHC管桩加固软土地基的效果。通过PHC管桩在厦深铁路软土地基工程的施工,对PHC管桩处理铁路软土地基的加固方法、施工工艺作了详细介绍,同时对于PHC管桩施工过程的质量控制要点及注意事项进行了详细阐述。加固后路基沉降量达到要求,达到了预期的加固效果。证明了PHC管桩加固铁路软土地基技术可靠性,对同类工程提供了参考价值。     

高速公路软土路基处理技术研究

通过对换填法、排水固结法、密实法以及复合式地基法等高速公路软土路基处理方法的探讨,指出在公路软土路基施工过程中,应根据工程的实际情况,选择合适的处理技术进行软土路基的加固处理,以确保施工路基的稳定。     

粉喷桩施工技术在高速公路软土路基中的应用

粉喷桩施工技术是对软土路基进行加固的一种方法。它能够有效地提高路基的强度和稳定性,适用于进行淤泥、淤泥质土、粉土以及黏性的地基加固处理,文章结合具体的高速公路施工实例,简要探讨粉喷桩施工技术在软土路基加固处理中的应用,为类似工程提供参考。     

论高铁施工中软土地基的处理

本文结合铁路软土路基的设计和施工实践,分析研究了水泥砂浆桩处理软土地基的加固机理、设计参数、施工工艺和加固效果等,对其加固软土地基的适宜性进行了评价,可供类似工程参考。     

碎石桩在软土地基中的应用与研究

为有效地减少软土地基沉降量,提高地基承载力,保持路基的稳定性,必须进行地基处理.通过碎石桩在软土路基处理中的应用,阐述了碎石桩加固软土地基的机理,碎石桩的设计,施工原则及施工中的注意事项.施工后,经复合式地基静载试验检测,地基承载力达到了设计要求,并取得了宝贵的经验.     

灌浆技术在市政道路软土地基中的应用研究

本文通过对市政道路软土地基承载力满足不了上部荷栽对路基的要求进行分析．提出采用灌浆加固处理方法．并对灌浆加固机理、灌浆设计与具体灌浆施工方法等进行了全面的分析,从检验效果的角度评价了灌浆技术加固市政道路软土地基的可行性。     

高速公路软土地基的加固措施研究

结合高速公路软土地基加固的目的——保证高速公路路基的强度和稳定性,分析了换填法、复合式地基加固处理法、排水固结法等软土地基加固处理方法的加固机理、处理特点及适用性,为高速公路软土地基加固处理方法的选择提供了理论依据。     

市政道路工程软土路基施工技术探析

在我国市政道路工程项目大量施工过程中,道路管线软基施工的问题越来越受重视。本文分析了市政道路施工过程中道路软基施工遇到的主要技术问题,阐述了对道路软基处理的常用方法以及软土基路堤填筑的关键工序,并对这些方法进行评价。     

高速公路软土路基处理方法分析

通过对软土路基特性的分析,提出软土路基处理方法及适用范围,为具体施工方法的选择提供借鉴,同时对保证施工路堤稳定和控制工后沉降有一定的参考价值。     

沿海高速公路软土地基变形规律及处理效果

以河北沿海高速公路软土地基试验工程的测试结果为基础,分析了塑料排水板及水泥搅拌桩超载预压两种处理方法下从路堤填筑到超载卸载以及路面结构层施工阶段软土地基的变形规律,并分析了地基处理的效果,从而为同类工程的设计和施工控制积累经验。     

高山林立的海涂地区道路工程施工

对高山林立的海涂地区道路工程施工的现状、道路工程施工的难点和不利的环境因素进行了分析,从适合于新方法的有利条件、操作步骤、基本原理,以及防止路基、路面开裂等方面进行了论述,提出了高山林立的海涂地区道路工程施工方法,解决了沿海软、硬土地基交接地区道路工程施工路面开裂、抗风、抗盐碱等问题。     

Performance of a road embankment on soft clay supported on a Geocell mattress foundation

A five kilometre-long road was constructed in the New Territories of Hong Kong between 1989 and 1992. Part of the road crossed an alluvial plain on an embankment, and at two locations on the alluvial plain this embankment was underlain by soft clay deposits. A geocell mattress was used as the means of supporting the embankment on these soft clay deposits. Wick drains were installed beneath the embankment to speed up consolidation of the soft clays, and using staged construction the embankment was built up to a maximum height of 10 m.

The embankment was fully instrumented with pneumatic piezometers, inclinometers, hydrostatic profile gauges, settlement plates, surface settlement markers, and lateral movement blocks. This paper presents the results of the instrumentation monitoring and the performance of the geocell mattress foundation during the construction of the embankment. At one section, unusually high excess pore water pressures and a slight heave of the toes of the embankment were recorded. The accompanying small lateral extension and the deflected shape of the geocell mattress indicated that it had behaved as a raft foundation to the embankment.     

浅谈软土路基加固技术

针对软基处理问题是当前公路建设中的一个重要的岩土问题,系统的总结了传统的路基加固技术,并介绍了各种技术的加固机理和自身特点,以期为软土路基加固方法的选择奠定基础。     

A simplified model to analyze the reinforced piled embankments

It is an economic way to use the piled embankment for the construction of embankment over soft soil. The combination of piles and reinforcement can effectively reduce the differential settlement at the surface of embankment. The paper presents a simplified model for analysis of an embankment of granular fill on soft ground supported by reinforcement and piles. This model is based on consideration of the arching effect in granular material proposed by Hewlett & Randolph. The vertical equilibrium of the unit body at the center of pile caps immediately below the reinforcement is established. The refinements of the model are that the failure mechanisms of the arch both at the crown and at the pile cap were considered, three-dimensional situation was taken into account for reinforced piled embankment, calculation of the vertical stress carried by the subsoil due to arching effect and reinforcement for multi-layered soil was proposed. Using the simplified model, the influence of embankment height, one-dimensional compression modulus of subsoil, tensile stiffness of reinforcement on stress reduction ratio (SRR) and tensile force of reinforcement is investigated. It is found that the model can be used to assess the relative contribution of the reinforcement and subsoil. The results show that subsoil gives a major contribution to overall vertical equilibrium, while the reinforcement gives obvious contribution at relatively large settlement. The inclusion of the reinforcement can reduce the vertical stress acting on the subsoil. The simplified model is then evaluated by three case studies. The results of this model show good consistence with these cases.     

京津高速公路软土区高路堤复合地基处理实例

根据京津高速公路天津段鱼塘范围内软土路段的高填土路堤设计方案,结合现场软基处理情况,综合考虑施工工艺及工序的影响,对软土地区桥头高填土路堤采用现浇薄壁混凝土管桩与加固土桩结合使用的应用效果进行分析,以供类似工程参考。     

加筋法在软土地基处理中的应用

结合某农田填方地段工程实际施工情况,对该工程采用路堤加筋法进行软土地基处理,主要介绍了加筋法施工方案的步骤和技术要点,并通过工程实施效果表明,采用加筋法处理软土,可以达到增强地基承载力,减小地基沉降变形的目的。     

Bearing capacity of geocell reinforcement in embankment engineering

Soil reinforcement using geocells has been utilized in many areas of geotechnical engineering. In this paper, a model and a simple bearing capacity calculation method for the geocell-supported embankment on the soft subgrade were proposed based on the study of the reinforcement functions of a geocell layer in a road embankment. The model and calculation procedures considered both the “vertical stress dispersion effect” and “membrane effect” of geocell reinforcement. They were verified by a laboratory experiment and compared with Koerner's method. The results indicated that the calculated results obtained from the present method were much closer to the experimental results than those from Koerner's method when the foundation settlement is large. The study also indicated that the installation of the geocell onto the crushed stone cushion significantly increased the bearing capacity of the soft subgrade.