铁道建筑
鐵道建築
철도건축
Railway Engineering
2015年
9期
82-85
,共4页
预应力锚杆%土钉%加固机理%稳定性%能量方程
預應力錨桿%土釘%加固機理%穩定性%能量方程
예응력묘간%토정%가고궤리%은정성%능량방정
Prestressed anchor%Soil nail%Reinforcement mechanism%Stability%Energy equation
针对预应力锚杆复合土钉支护体系，讨论了极限平衡法及有限元法的局限性，提出运用能量方程评价体系稳定性的新思路。首先，基于合理假定将复合支护体系简化为作用于增强体的单一的预应力锚杆柔性支护，并建立简化力学模型；然后，根据虚功原理对土钉支护的加固机理进行分析，提出类黏聚力的概念；最后，推导出增强土体及预应力锚杆的能量方程。提出的方法对于推进预应力锚杆复合土钉支护体系的稳定性分析有着一定的借鉴意义。
針對預應力錨桿複閤土釘支護體繫，討論瞭極限平衡法及有限元法的跼限性，提齣運用能量方程評價體繫穩定性的新思路。首先，基于閤理假定將複閤支護體繫簡化為作用于增彊體的單一的預應力錨桿柔性支護，併建立簡化力學模型；然後，根據虛功原理對土釘支護的加固機理進行分析，提齣類黏聚力的概唸；最後，推導齣增彊土體及預應力錨桿的能量方程。提齣的方法對于推進預應力錨桿複閤土釘支護體繫的穩定性分析有著一定的藉鑒意義。
침대예응력묘간복합토정지호체계，토론료겁한평형법급유한원법적국한성，제출운용능량방정평개체계은정성적신사로。수선，기우합리가정장복합지호체계간화위작용우증강체적단일적예응력묘간유성지호，병건립간화역학모형；연후，근거허공원리대토정지호적가고궤리진행분석，제출류점취력적개념；최후，추도출증강토체급예응력묘간적능량방정。제출적방법대우추진예응력묘간복합토정지호체계적은정성분석유착일정적차감의의。
According to prestressed anchor composite soil nails support system,the paper discussed the limitations of limit equilibrium method and f inite element method,and proposed a new idea of applying energy equation to evalu-ate the system stability.Firstly, the composite support system was simplif ied as single prestressed anchor f lexible retaining structure which acts on special reinforced soil based on reasonable assumptions and a simplif ied mechanics model was established.Then, reinforcement mechanism of soil nails support was analyzed and the concept of homogeneous cohesion was put forward according to the principle of virtual work.Finally,the energy equations of reinforced soil and prestressed anchor were derived.The proposed method in this paper will provide a reference for improving the stability analysis of prestressed anchor composite soil nails support system.
