摘要
依托国家跳台滑雪训练科研基地的BigAir项目,采用迈达斯(Midas)软件建模进行填方范围分析,指导现场实现滑道填方造型。通过“锚喷+注浆”方式改善堆填体物理力学性质,控制降水入渗导致的细颗粒流失;滑道正面边坡采用“竖梁+锚杆”支护形式,锚杆长度的确定方法解决了复杂地层条件下滑动面随锚杆长度变化而导致计算有多种解的难题;侧面边坡采用“格构梁+锚杆+生态喷播”方案进行加固和绿化,提出了利用几何空间关系确定填方体厚度变化条件下锚杆长度的方法,并结合现场放线动态调整格构梁布置。通过综合分析,对BigAir项目进行了分区设计,为类似项目提供了一种可靠的设计思路。
A case study on the filling works of the BigAir project of National Ski Jumping Training and Research Base is carried out. Midas software is used to analyze the filling range and provide guidance on the filling form. The physical and mechanical properties of the landfill are improved by anchoring and grouting, and the loss of fine particles caused by precipitation infiltration is controlled;the skiing track slope is reinforced by vertical beam and anchor. The method of determining the anchor length solves the problem that the sliding surface varies with the length of anchor under complicate stratum conditions, which leads to multiple solutions;the slope side is strengthened and greened with the scheme of frame beams, anchor and hydro-seeding. A method to determine bolt length under the condition of filling thickness variation is proposed using geometric spatial relations, and the arrangement of lattice beam is dynamically adjusted according to the ground feature. Through the comprehensive analysis, the zoning design method of BigAir project provides a reliable design idea for similar projects.
作者
李姝
范铁强
Li Shu;Fan Tieqiang(BGI Engineering Consullants Ltd,Bejing 100038,China)
出处
《工程勘察》
2023年第3期12-16,共5页
Geotechnical Investigation & Surveying
关键词
填方边坡
格构梁
锚杆
动态设计
filling slope
frame beams
anchor
dynamic design
