文档介绍：西安科技大学
硕士学位论文
隧道管棚超前支护技术研究
姓名:王军舰
申请学位级别:硕士
专业:岩土工程
指导教师:王小林
2011
论文题目:隧道管棚超前支护技术研究
专业:岩土工程
硕士生:王军舰(签名)
指导教师:王小林(签名)
摘要
管棚超前支护技术作为隧道开挖的一种辅助工法,在防止隧道塌方、抑制地层位移、
控制地表沉降等方面发挥着重要作用,它能够有效地解决隧道在穿越浅埋大偏压、软弱
破碎、流泥等特殊地质条件隧道开挖问题,此外,管棚超前支护技术还具有超前加固距
离长、可靠性高、工期短等优点,因此管棚工法正得到越来越多的应用。本论文以管棚
超前支护技术为研究对象,运用理论分析、数值模拟等研究手段,主要做了以下工作:
(1)在常用围岩压力理论的基础上,综合考虑了隧道埋深、围岩条件、开挖条件以及
管棚作为超前支护结构的特点等因素,得出了深、浅埋隧道管棚受力荷载的计算公式,
并基于弹性地基梁理论建立了管棚的力学分析模型,采用解析解得到了管棚支护结构的
挠度、转角及弯矩方程。
(2)应用土拱效应原理得出了管棚环向最大容许间距的计算公式。
(3)应用三维有限差分软件(FLAC3D)对管棚超前支护结构进行了数值模拟,对管棚
布置型式、支护长度的改变、注浆与否以及注浆厚度的改变对隧道开挖的影响进行了分
析,计算结果表明:管棚存在最佳布置型式;管棚支护长度的增大对隧道位移的影响不
大;注浆厚度的增大对隧道位移的控制作用并不显著,并存在最佳注浆厚度。
以上研究成果对于管棚支护设计理论和施工实践都具有重大的借鉴意义。

关键词:隧道;管棚超前支护技术;支护原理;数值模拟
研究类型:应用研究
Subject : Study on Advanced Support Technique with Pipe-roof in Tunnel
Specialty : Geotechnical Engineering
Name : Wang Junjian (Signature)
Instructor : Wang Xiaolin (Signature)
ABSTRACT
Pipe roof pre-support technology, as an auxiliary technique in tunnel excavation, has
important function on preventing tunnel collapse, restraining ground movement and
controlling ground surface settlement. It can solve the tunnel excavating problem effectively
when the tunnel is constructed in soft or weak strata, such as shallow buried, crashed soft
surrounding rock and abundant underground water. Furthermore, Pipe Roof Method has been
widely applied because it has long pre-reinforce distance, high reliability, short construction
period and other relative advantages. Taking pipe roof pre-support technology as the object to
be investigated, using theory analysis and numerical simulation, a series of results were
obtained.
(1) Pre-supports and protections mechanism of shed-pipe technology is explored.
Considering with the effects of the tunnel cover depth, the geological conditions and manners
of excavation on the surrounding rock pressure, the equations for pipe roof reinforcement
loading were proposed according t