淺析基樁高應(yīng)變動力檢測應(yīng)注意的問題及風(fēng)險探討-全文預(yù)覽
【正文】 號進(jìn)行平均,以消除錘擊偏離中心的影響,決不能一側(cè)安裝傳感器。假設(shè)樁為一維線彈性桿，測點(diǎn)下樁長為L，橫截面積為A，樁材彈性模量為E，樁材質(zhì)量密度為P，樁身內(nèi)應(yīng)力波傳播速度(俗稱彈性波速)為C(C =E／p)，廣義波阻抗或樁身截面力學(xué)阻抗為Z=ApC；其樁身應(yīng)力應(yīng)變關(guān)系可寫為：實(shí)測曲線擬合法采用了較復(fù)雜的樁一土力學(xué)模型，選擇實(shí)測力或速度或上行波作為邊界條件進(jìn)行擬合，擬合完成時計算曲線應(yīng)與實(shí)測曲線基本吻合，樁側(cè)土摩阻力應(yīng)與地質(zhì)資料基本相符，貫入度的計算值應(yīng)與實(shí)測值基本吻合，從而獲得樁的豎向承載力和樁身完整性。第二章是簡述樁基高應(yīng)變動力檢測的原理和過程。然而，經(jīng)過30多年的工程實(shí)踐，高應(yīng)變動力試驗(yàn)檢測也有它的不足之處，檢測風(fēng)險隨之而來，也曾遭到工程界的質(zhì)疑。闡述高應(yīng)變檢測的過程，分析高應(yīng)變檢測中存在的若干問題及其檢測風(fēng)險，提出化解這些問題和風(fēng)險的方法與建議，闡明樁基工程檢測從資料的收集到檢測的方法制定、多種檢測方法的搭配、相互驗(yàn)證及質(zhì)量管理的重要性。 pay attention to several problems。然而，經(jīng)過30多年的工程實(shí)踐，高應(yīng)變動力試驗(yàn)檢測也有它的不足之處，檢測風(fēng)險隨之而來，也曾遭到工程界的質(zhì)疑。東北大學(xué)繼續(xù)教育學(xué)院畢業(yè)設(shè)計（論文）摘 要高應(yīng)變試樁法檢測基樁的承載力,已經(jīng)在國際上得到了樁基檢測界的一致認(rèn)可。在樁頂測到的樁土響應(yīng)信號包含有承載力因素,所以基樁高應(yīng)變動力檢測規(guī)范適用于判定基樁的極限承載力和樁身結(jié)構(gòu)完整性。s mainly through the displacement, the displacement, pile and pile tip resistance of soil to some extent mand. In the pile soil pile top to the measured response signals including bearing capacity factors, so the pile high strain dynamic pile testing specification for applied to determine the ultimate bearing capacity and pile structure integrity. However, after 30 years of engineering practice, high strain dynamic testing also has its shortings, detection the attendant risks, questioning was engineering. As a method of high strain testing, to ensure the quality of pile foundation engineering testing, this paper mainly in high strain dynamic test
電大資料相關(guān)推薦
鄂ICP備17016276號-1