摘要
基于复杂的工程实际,建立"堤防-桩-地基"的三维数学模型,先通过变位观测值反演出杂体土及其灌浆后的力学参数;再根据反演成果,计算现状堤防在达标洪水作用下的变位达5. 8 cm,位移太大,表明对现状堤防加固是必要的,同时也得到内排桩内侧地基土的变形是桩基水平变位的重要原因;然后提出在堤后增设地下连续墙的加固方案,计算表明该方案可较好地控制堤防位移,虽改变原有桩基的受力特点,但结构强度仍满足规范要求。研究表明:经观测率定的数值分析方法和成果为复杂地基堤防加固的研究和设计提供了有效、可靠的参考和依据。
Based on the complicated engineering practice,a three-dimensional mathematical model of"dike-pile-foundation"was established.The parameters of the mixed soil and its grouting were first inspected through the displacement observations.Then based on the inversion parameters,the displacement of current dikes against floods was calculated to be 5.8cm,and the displacement was too large,indicating that it is necessary to reinforce the existing dike;It also shows that the deformation of the inner soil of the inner row pile is an important reason for the horizontal displacement of the pile foundation.Then,the reinforcement scheme of adding underground continuous wall behind the embankment is proposed.The calculation shows that the scheme can better control the embankment displacement.Although the force characteristics of the original pile foundation are changed,the structural strength still meets the specification requirements.The research shows that the numerical analysis method and the results obtained by the observation rate provide an effective and reliable reference and basis for the research and design of the embankment reinforcement on the complex foundation.
作者
王政平
何宝根
李晓旭
WANG Zhengping;HE Baogen;LI Xiaoxu(China Water Resources Pearl River Planning Surveying &Design Co.,Ltd.,Guangzhou 510610,China)
出处
《人民珠江》
2019年第1期125-130,共6页
Pearl River
关键词
堤防
桩基
变位
有限元
流固耦合
加固
dike
pile foundation
displacement
finite element
fluid-solid coupling
reinforce
