先张法预应力混凝土异型桩的发展概况调研

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介绍了日本和我国管桩、异型桩的生产、使用以及相关标准的制定情况,提出目前我国的三角形桩、六边形桩、齿形桩、锥形管桩、八角形桩等畀型桩至今未有国家、行业和地方标准,强调了国家标准《先张法预应力混凝土异型桩》制定的必要性。
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