期刊论文

中文

铁道科学与工程学报

1672-7029

2017

14

11

2418-2426

10.19713/j.cnki.43-1423/u.2017.11.020

51008309:国家自然科学基金 51678226:国家自然科学基金

本校为其他机构

依托南昌地铁1号线5标段盾构工程,考虑土舱压力、岩土地层松散性、盾构机渣土改良系统和泡沫消散等因素,对盾构开挖面泥质粉砂岩与砾砂层体积比为1/1区段泡沫剂用量进行优化,分析渣土改良对总推力、扭矩和土舱压力的影响。研究结果表明:渣土改良对盾构施工参数有一定的影响,渣土改良参数优化后盾构总推力、扭矩和土舱压力相对平稳。渣土中泡沫添加比的增大,能适当降低盾构机总推力和扭矩。盾构机停机时由于受到泡沫破碎或消散的影响,土舱压力随时间而逐渐减小。盾构掘进阶段时渣土改良能减小土舱压力的波动幅度,且泡沫添加比越高,土舱压力波动幅度越小。

Based on the shield tunneling of Nanchang Metro Line 1 No. 5 Section, considering the influences of soil chamber pressure, formation looseness, soil modification system and foam properties, the consumption of foaming agent for modified soils of which the volume ratio between argillaceous siltstone and gravelly sand is 1:1 was optimized. The effect of soil modification on total thrust, torque and cabin pressure was analyzed. The results showed that soil modification had a certain influence on the shield tunneling parameters, and total thrust, torque and cabin pressures were relatively stable af...