CAJ | 학술논문

在前人理论上推导的基础上,进一步计算了类土质边坡单锚预应力自坡面向坡体内的传递范围,计算了坡体内不同位置处的预应力传递系数,分析得出单锚预应力自坡面向坡体内传递的扩散角为39°左右、合理锚间距为3.2 m左右.以G323改造工程K617段花岗岩风化形成的类土质边坡为原型进行了离心模型试验,在坡体模型内不同位置埋设土压力盒,通过测读土压力盒的读数,得出预应力在坡体内不同位置处引起的土压力变化,间接得出预应力自坡面向坡体内的传递规律.离心模型试验得出的预应力传递规律与理论推导得出规律基本吻合,并得出了预应力传递系数与初始锚固预应力有关的结论,认为这主要是因为边坡岩土体产生塑性形变的结果.理论分析和离心模型试验均得出,锚固措施对近坡面处的浅层土体并无明显的加固作用,锚固边坡也必须进行坡面防护.
재전인이론상추도적기출상,진일보계산료류토질변파단묘예응력자파면향파체내적전체범위,계산료파체내불동위치처적예응력전체계수,분석득출단묘예응력자파면향파체내전체적확산각위39°좌우、합리묘간거위3.2 m좌우.이G323개조공정K617단화강암풍화형성적류토질변파위원형진행료리심모형시험,재파체모형내불동위치매설토압력합,통과측독토압력합적독수,득출예응력재파체내불동위치처인기적토압력변화,간접득출예응력자파면향파체내적전체규률.리심모형시험득출적예응력전체규률여이론추도득출규률기본문합,병득출료예응력전체계수여초시묘고예응력유관적결론,인위저주요시인위변파암토체산생소성형변적결과.이론분석화리심모형시험균득출,묘고조시대근파면처적천층토체병무명현적가고작용,묘고변파야필수진행파면방호.
The transferring equation of the prestressed force from slope surface into slope body in singly anchored soil-like slope is deduced and discussed on the assumption that the slope body is elastomeric.The transferring coefficients of the prestressed force are put forward according to the transferring formula.The conclusions are drawn that the spreading angle of the prestressed force from slope surface into slope body in singly anchored slope is approximate 39o; and that the optimal space between anchors is about 3.2 m.Some centrifugal model tests are carried out according to a strongly weathered granite slope locating at K617 of G232 road.In the centrifugal model tests,earth pressure cells are set at different points of the slope body to monitor the increased earth pressures caused by the prestressed force.And then the transferring discipline of the prestressed force from slope surface into slope body can be brought out.The results drawn out from centrifugal model tests agree in the main with what from theoretical study.The coefficients of the prestressed force obtained from model tests are related to the amount of the prestressed force,while it is apart from the amount of the prestressed force in the theoretical study.The plastic deformations that occur in the model tests but not be considered in the theoretic study are the main reason.Both the theoretical study and the model tests result in that slope surface protection must be taken into consideration because the effect of the reinforcing is indistinctive in the surface layer of about 2 m.