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首页> 外文期刊>Ground improvement >Ground improvement solutions for motorway widening schemes and new highway embankment construction over soft ground
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Ground improvement solutions for motorway widening schemes and new highway embankment construction over soft ground

机译：高速公路拓宽方案和软土地上的新公路路堤施工的地面改进解决方案

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摘要

Over recent years both motorway/highway widening and new highway construction schemes have become increasingly fast track and complex. As such it is not always possible to permit sufficient time within the construction programme to allow settlement to occur for new embankments, particularly over soft ground, without some form of ground improvement. Some important steps in achieving successful ground improvement implementation are: adequate geotechnical site investigation; an appropriate design and review process; consideration of the interfacing of different ground improvement techniques; preliminary trials; monitoring, testing and quality control. Dependent upon the soil profile and geometry, this can be achieved in critical zones using a combination of ground improvement techniques such as vibro concrete columns (VCCs), vibro stone columns (VSCs) and vertical band drains (VBDs), to control settlements and also smooth out the settlement profile on the approach to rigid (piled) bridge abutments to ensure acceptable vehicle ride quality and reduce maintenance. These aspects are discussed, based upon ground improvement experiences on recent motorway widening and new highway construction schemes over soft ground in the UK.
机译：近年来，高速公路/高速公路拓宽和新的高速公路建设方案都变得越来越快且复杂。因此，并非总是有可能在施工程序中留出足够的时间来允许新路堤发生沉降，尤其是在软土地上，而无需对地面进行某种形式的改善。成功实施地面改善工作的一些重要步骤包括：适当的岩土现场调查；适当的设计和审查过程；考虑不同地面改良技术的接口；初步试验；监控，测试和质量控制。取决于土壤剖面和几何形状，可以在地面上结合地面改良技术（例如振捣混凝土柱（VCC），振捣石柱（VSC）和垂直带状排水管（VBD））来控制沉降，并实现沉降修整刚性（桩式）桥台时的沉降轮廓，以确保可接受的车辆行驶质量并减少维护。根据英国最近高速公路拓宽的地面改良经验和英国在软土地上的新公路建设计划，对这些方面进行了讨论。

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