The tunnel portal earth pressure is divide into two parts at tunnel lining height, the earth pressure intensity-formula at upper part, below part, general earth pressure formula and earth pressure action point formula are derived.
英
美
- 以隧道襯砌的高度為界，將隧道洞門(mén)土壓力計算分為上、下兩部分，推導出上部上壓力強度、下部土壓力強度、總土壓力及土壓力作用點(diǎn)的計算公式。
