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近年来,随着经济的不断发展,我国公路建设的规模日益扩大,难度不断提高。在长三角地区高速公路建设中,普遍存在着软土地基问题,比如由于抗剪强度不足产生局部或整体剪切破坏,造成地基滑动破坏的稳定问题;不均匀沉降引起路面开裂及桥头跳车等。这一系列问题将影响道路的正常使用,这些地基问题必须认真对待和妥善处理,处理的恰当与否将直接关系到工程质量、投资和进度。常见的软基处理方法有预压法、反压护道法、水泥土搅拌桩法、换填法、强夯法、加筋路基法。CCMG桩是一种新型软基处理方法,主要介绍CCMG桩施工工艺、施工特点、优越性,以及CCMG桩在软土地区桥头过渡段和箱涵地基中应用的初期成效。为软基处理提供新的方法与途径。
In recent years, with the continuous development of the economy, the scale of our country’s highway construction is expanding day by day, and the difficulty is constantly increasing. In the construction of the expressway in the Yangtze River Delta region, there are common problems of soft ground, such as partial or total shear failure caused by insufficient shear strength, resulting in the stability of the foundation sliding failure; uneven settlement caused road cracking and bridge jumping . This series of problems will affect the normal use of the road. The problems of these foundations must be taken seriously and properly handled. The proper handling will be directly related to the project quality, investment and progress. Common soft foundation treatment methods are preloading, anti-pressure protection Road, cement soil mixing pile method, replacement method, dynamic compaction method, reinforced subgrade method. CCMG pile is a new method of soft foundation treatment. It mainly introduces the construction technology, construction characteristics and advantages of CCMG pile, as well as the initial achievements of CCMG pile in bridgehead transition and box culvert foundation in soft soil area. It provides a new method and way for soft foundation processing.