无砟轨道端刺区水平位移病害整治方案研究  

Research on the Treatment Scheme of Horizontal Displacement Disease in Side Spines Zone of Ballastless Track

作　　者：金海元[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道工程学报》2017年第10期34-38,59,共6页Journal of Railway Engineering Society

摘　　要：研究目的:本文以某运营高速铁路端刺区水平位移病害整治为工程背景,根据端刺区水平位移的现场特征分析产生水平位移的主要原因,结合端刺区周围岩土体特点及现场施工条件,确定整治加固方案、施工工艺及关键技术参数等,以期为我国建立无砟轨道维养技术体系提供有力支撑。研究结论:(1)端刺区水平位移主要由周围岩土体产生的残余变形导致抗力不能满足轨道纵向巨大温度力变化所引起;(2)提出了钢花管注浆处理端刺区病害的整治方案,包括端刺周围竖直、倾斜注浆孔布置方式,分为深孔注浆和浅孔注浆形式;采用超细水泥作为主要注浆材料,注浆压力控制在0.1~0.3 MPa;施工过程中相邻两次轨道测量横向或竖向变形量不大于1 mm作为轨道变形控制标准;(3)钢花管注浆后保留在注浆孔内,形成微型群锚结构,大大提高了抵抗端刺水平变形的抗力;(4)本研究成果可为高速铁路无砟轨道端刺区的设计、施工、运营维护提供借鉴。Research purposes： Based on the analysis of the horizontal displacements of side spines zone of an operational high- speed railway, the main reasons for the horizontal displacement are analyzed according to the field characteristics. The reinforcement scheme, construction technology and key technical parameters are determined according to the characteristics of the surrounding rock mass and the site construction condition, to provide a strong support for the establishment of maintenance technology system of ballastless track. Research conclusions： （ 1 ） The horizontal displacement of the side spine is mainly caused by the residual deformation of the surrounding rock and soil, resulting in that resistance can not meet the orbit longitudinal huge force caused by temperature changes. （2） The paper puts forward the remediation plan of steel pipe grouting to deal with the disease of the side spines zone, including vertical and inclined grouting hole arrangement around the side spines zone, divided into deep hole grouting and shallow hole grouting. Using superfine cement as the main grouting material, grouting pressure is controlled in the 0.1 - 0.3 MPa. The two adjacent orbital measurement of horizontal or vertical deformation in the construction process are not allowed to be more than 1 mm. （ 3 ） The steel tubes retained in the grouting hole after grouting, which formed micro - group anchor structure, and greatly enhanced the level of resistance to deformation. （4） The research results can provide a reference for the design, construction, operation and maintenance of side spines zone of ballastless track.

关 键 词：无砟轨道端剌区 水平位移 钢花管注浆 微型群锚结构 

分 类 号：TU478[建筑科学—结构工程]