884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（遼寧工程技術(shù)大學(xué)土木與交通學(xué)院， 阜新 123000）

［摘要］為了探究遼寧西部地區(qū)抗浮錨桿的極限抗拔力和有效錨固長度的取值，以遼寧阜新玉龍時(shí)代廣場抗浮錨桿為工程背景，對抗浮錨桿進(jìn)行現(xiàn)場抗拔試驗(yàn)，通過6根抗浮錨桿在連續(xù)荷載作用下的破壞性抗拔試驗(yàn)，測試錨桿桿體的抗拔力，并進(jìn)一步利用公式推算錨桿軸力和剪應(yīng)力，并繪制出錨固深度與軸力、剪應(yīng)力的變化曲線。分析結(jié)果表明，注漿體與錨桿桿體間的軸力、剪應(yīng)力分布是不均勻的，自孔口到桿底端呈逐漸遞減的分布模式；當(dāng)錨桿桿體的內(nèi)力（軸力和剪應(yīng)力）達(dá)到某一臨界值時(shí)，錨桿桿體變形由彈性變化為塑性，這一臨界值接近于桿體的極限抗拔承載力，錨桿抗拔時(shí)并非全長同時(shí)受力，而是分階段受力；經(jīng)分析此項(xiàng)目中抗浮錨桿極限抗拔力為270～330kN，抗浮錨桿的有效錨固長度約3-6m，可為遼寧西部地區(qū)的中風(fēng)化砂頁巖中抗浮錨桿的使用提供參考依據(jù)。

［關(guān)鍵詞］中風(fēng)化砂頁巖； 抗浮錨桿； 抗拔試驗(yàn)； 極限抗拔力； 有效錨固長度

中圖分類號(hào)：TU470文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)03-0125-05

Study on ultimate pull-out capacity and effective anchorage length of anti-floating anchor rod in moderately weathered sand shale

Su Zhongjie, Lei Kang, Yang Yu

(School of Civil Engineering and Transportation, Liaoning Technical University, Fuxin 123000, China)

Abstract:In order to study the value of  the ultimate pull-out capacity and effective anchorage length of anti-floating anchors in the western part of Liaoning Province, field pull-out test of anti-floating anchors was carried out on the background of anti-floating anchors in Yulong Times Square in Fuxin, Liaoning Province. Through destructive pull-out tests of six anti-floating anchors under continuous loads, the pull-out capacities of anchors was tested. Furthermore, the formula was used to calculate the axial force and shear stress of the anchor rod, and the curves of the axial force and the shear stress changing with the anchorage depth were drawn. The analysis results show that the distribution of axial force and shear stress between grouting body and anchor rod body is not uniform, and the distribution pattern decreases gradually from the orifice to the bottom of the anchor rod; When the internal force (axial force and shear stress) of  anchor rod body reaches a certain critical value, the deformation of anchor rod body changes from elasticity to plasticity, the critical value is close to the ultimate pull-out bearing capacity of the anchor rod. The pull-out capacity of the anchor rod is not a full-length force at the same time, but is subjected to it in stages. The ultimate pull-out capacity of anti-floating anchor rod  in this project is 270～330 kN, and the effective anchorage length of anti-floating anchor rod is about 3-6m, which can provide a reference for the use of anti-floating anchor rod in weathered sand shale in the western part of Liaoning Province.

Keywords:moderately weathered sand shale; anti-floating anchors; pull-out test; ultimate pull-out capacity; effective anchoring length