樁基礎(chǔ)的靜荷載試驗最大加載值的確定
楊 洪
- 摘 要
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楊 洪
（廣東省佛山市南海區(qū)圖涵建筑技術(shù)服務(wù)有限公司，佛山 528200）[摘要] 做單樁豎向抗壓承載力靜荷載試驗時，在地基土對樁產(chǎn)生負側(cè)阻和地震區(qū)存在液化土層且地震時液化土對樁的側(cè)阻力減小的情況下，按常規(guī)做法確定單樁豎向抗壓最大加載值得出的樁承載力特征值，其安全系數(shù)不滿足規(guī)范要求，且在這種情況下按規(guī)范得出的單樁承載力特征值安全系數(shù)不夠。經(jīng)過分析，提出了解決上述問題的方法。
[關(guān)鍵詞] 抗壓最大加載值；單樁承載力特征值；安全系數(shù)
中圖分類號：TU473 文獻標識碼：A 文章編號：1002-848X(2012) Sl-0850-03
Determination of dead load test maximum load value of pile foundation
Yang Hong
( Nanhai Tuhan Building Technical Service Co., Ltd., Foshan 528200, China)
Abstract: When carrying on dead load test for the compressive bearing capacity of a pile, under the routine condition that foundation soil produces negative skin friction on the side of piles,a stratum of liquefaction exists in seisnuc area, and the skin friction of the stratum of liquefaction to piles was reduced in earthquake, the safety factor of vertical bearing capacity characteristic value of single pile calculated as per the above practice to determine vertical maximum value of compressive loading on single pile can't meet the requirement of the technical code. And under the circumstance, the safety factor of vertical bearing capacity characteristic value of single pile obtained as per technical code is not enough. Based on the analyses, the method to solve these preblems was proposed.
Keywords: maximum value of compressive loading; bearing capacity characteristic value of a pile; safety factor
