大西客运专线忻州隧道自进式管棚施工技术

Construction Technology of Self Drilling Pipe Shed in a Tunnel in Shanxi

摘要:

大西客运专线忻州隧道斜穿大运高速公路，洞顶至高速路面土层较浅，且土体具湿陷性，沉降控制要求极高。施工采取自进式管棚进行一次性超前支护，既保证了高速公路的安全运营，又有效的控制了路面沉降。施工实践充分证明了自进式管棚具有一次性施做距离长、精度可控性强、对地面沉降影响小、注浆饱满度可控等优点，为自进式管棚技术的推广应用提供了借鉴经验。

Abstract:

Xinzhou tunnel section of Datong-Xi’an is oblique crossing Dayun expressway, the tunnel top is near the collapsible soil of expressway, so settlement control requirements are very strict. By one-time advanced support using self drilling pipe shed, the safe operation of expressway was ensured and pavement settlement was effectively controlled. The construction practice shows that self drilling pipe shed has advantages of one-time long distance construction, precious construability, less ground settlement and controllable grouting fullness, and can be the reference to the application of self drilling pipe shed technology.