混凝土井壁竖向极限承载能力计算的研究

应用不同的约束混凝土强度理论，对混凝土井壁的竖向极限承载能力进行了计算分析，通过与试验结果的比较，认为进行混凝土井壁的竖向极限承载能力计算采用Ｏｔｔｏｓｅｎ准则和Ｐｏｄｇｏｒｓｋｉ准则较合适。为计算方便和精确，又对各种在等值测压条件下混凝土破坏准则进行了分析，最后利用试验结果，建立了一个形式简单、物理概念明确的混凝土井壁破坏准则，从而得到了该种井壁的竖向极限承载能力计算公式，可供设计时采用。

CALCULATION OF VERTICAL ULTIMATE CARRYING CAPACITY OF CONCRETE SHAFT LINING

Vertical ultimate carrying capacity of shaft lining is made by applying different theories of confined concrete strength. Based on test data, it is considered that Ottosen and Podgorski Criteria are suitable for calculating the vertical ultimate carrying capcacity. The concrete failure criterion were studied at different conditions of equal confined pressure for easy and accurate calculation. Finally a simple and precise criterion for concrete shaft lining failure is established on the basis of test data. And equation for calculation of vertical ultimate carrying capacity of shaft lining is obtained for design of shaft lining.