By use of the node virtual discharge method and introduction of inhomogeneous stratified material elements and planar non-thickness elements, a numerical model is established for analysis of the seepage field of the Jiangya roller compacted concrete gravity dam.

運(yùn)用固定網(wǎng)格的結(jié)點(diǎn)虛流量法、非均質(zhì)成層材料單元、縫面無(wú)厚度平面單元等,對(duì)江埡碾壓混凝土壩滲流場(chǎng)進(jìn)行了建模與分析研究。

90?m and RCC concrete below the elevation and with an upstream conventional concrete slab structure for impermeabilization,the authors develop an inhomogeneous multi laminate media element model for seepage analysis of RCC dams based on the research of the numerical procedure of nodal virtual flux and the technique of draining substructure for drainage holes.

:基于長(zhǎng)江三峽大壩碾壓混凝土方案左廠房 12號(hào)壩段上部為常態(tài)混凝土、下部為上下游面均設(shè)有常態(tài)混凝土的防滲結(jié)構(gòu)型式的碾壓混凝土壩的特點(diǎn) ,借助于滲流場(chǎng)求解的結(jié)點(diǎn)虛流量法及排水子結(jié)構(gòu)技術(shù) ,并提出“排水孔開(kāi)關(guān)器”的概念和滲流非均質(zhì)成層材料單元模型 ,對(duì)壩中設(shè)計(jì)時(shí)存在的主要滲流疑慮問(wèn)題、大壩的防滲與排水設(shè)施滲控方案的特性進(jìn)行了數(shù)值分析研究 。

Based on the layered visco_elastic soil model, according to the Terzaghi s one dimensional consolidation theory, by the method of Laplace transform and matrix transfer technique, the problems about the consolidation of layered and saturated visco_elastic soils under arbitrary loading were solved.

針對(duì)成層粘彈性地基模型 ,運(yùn)用Laplace變換及矩陣傳遞法求解了任意荷載下成層粘彈性地基一維變形問(wèn)題 ,得到了頻域內(nèi)的通解 ,通過(guò)Laplace逆變換 ,即可計(jì)算成層粘彈性地基在任意荷載下的一維變形·　Terzaghi一維固結(jié)理論解是本文的一個(gè)特例·　結(jié)合三層地基的算例 ,可以看到粘彈性地基的固結(jié)相對(duì)于彈性地基有個(gè)滯后過(guò)程 ,但隨時(shí)間最終趨于一致 ;循環(huán)荷載下粘彈性多層地基固結(jié)時(shí) ,其有效應(yīng)力和變形都呈振蕩增長(zhǎng) ,且不與荷載同步 ,而要相對(duì)滯后·　此外 ,通過(guò)一工程實(shí)例 ,對(duì)該方法的可靠性進(jìn)行論證 ,以證明該法確能指導(dǎo)工程實(shí)