The lateral stress was larger than the vertical stress, and when the fixed height was lower, the difference was more obvious.
侧向应力大于垂直应力，且固定高度越低，差异越明显。
And the steel tube provides lateral stress at initial period to make up the defect that constraining force comes up too late.
另一方面使核心混凝土在受荷初期就处于侧向受压的状态，弥补钢管对混凝土紧箍力出现太迟的缺陷。
By elastic foundation coefficient method, this paper calculated lateral stress that elastic pile ACTS on surrounding rock soil.
用弹性地基系数法，计算了弹性桩作用于桩侧岩土体的应力。
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