摘要
板桩码头结构深水化过程中遇到的主要问题是如何克服作用于前墙上的随开挖深度剧增的土压力。遮帘式板桩结构的设计思路是在传统的板桩码头前墙陆侧增加一排遮帘桩,利用其遮帘效应来分担一部分作用于前墙上的土压力,从而达到建设大型深水板桩码头的条件。通过前期开发的基于ABAQUS有限元平台的土和结构相互作用分析软件,采用"南水双屈服面弹塑性本构模型"来模拟地基土的应力应变关系,通过基于接触力学的本构模型来模拟土和码头结构的相互作用,研究了遮帘桩的工作机理和遮帘效应,探讨了遮帘式板桩码头前墙两侧的土压力分布规律,以及码头结构的变形和弯矩分布规律。通过与单锚板桩码头结构的比较,验证了遮帘式板桩码头对于板桩码头深水化的作用。
The main problem for deep-water sheet-pile wharf is how to deal with the earth pressures acting on the front wall, which dramatically increase with the excavation depth. The design idea of the barrier-pile structure is as follows： a row of barrier piles are constructed in front of the traditional sheep-pile wharf, and part of the earth pressures acting on the front wall are shared owing to their barrio effects so as to reach the condition for building large deep-water sheet-pile wharf. Using the developed analysis software for soil-structure interaction based on ABAQUS, the NHRI double-yield face elastoplastic constitutive model is employed to simulate stress-strain relation of soils. The constitutive model based on contact mechanics is used to simulate soil-wharf interaction. The mechanism and effect of barrier piles are studied, the distribution rules of earth pressures at the two sides of the front wall of the sheet-pile wharf with barrier piles are discussed as well as its deformation and distribution of bending moment. By comparing with the sheet-pile wharf with single anchorage, the deep-water sheet-pile wharf with barrier piles is validated.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2015年第10期1745-1750,共6页
Chinese Journal of Geotechnical Engineering
基金
国家高技术研究发展计划("863"计划)课题项目(2012AA112510)
关键词
板桩码头
遮帘桩
数值模拟
土压力
sheet-pile wharf
barrier pile
numerical simulation
earth pressure
