为研究盾构施工过程中施工振动的产生机制,掌握盾构施工振动传播规律,减少振动对邻近建筑物的危害,对国内外相关研究进行调研总结。首先,分析盾构隧道施工过程中振动产生来源、振动特性和振动传播规律,论述盾构施工振动对邻近建筑物振动响应的现场监测以及数值模拟研究进展;其次,分别从振源控制、振动传播途径控制和受振对象保护3个方面总结已有的隔振减振措施;最后,指出现有研究存在的不足,并提出盾构施工振动响应与控制问题有待进一步研究的方向。主要结论如下: 1)盾构施工过程中,振动主要是由盾构刀盘切削土体造成的; 2)隧道周围土体的性质是影响施工振动传播的主要因素; 3)当盾构行进至邻近建筑物附近时,降低盾构掘进速度、控制盾构推进力及刀盘切削转矩是减少隧道施工振动影响的有效措施。
It is necessary to study how vibration generates and
propagates during shield construction process, so that the harm of vibration to
the adjacent buildings can be reduced. Based on the relevant research in China
and abroad, the generating sources of vibration, vibration characteristics, and
propagation law during shield construction process are analyzed, and insitu
monitoring and numerical simulation research for the vibration response of
adjacent buildings during shield construction process are discussed. Then the
existing vibration isolation and damping measures are summarized from three
aspects, namely vibration source control, vibration propagation path control,
and vibration object protection. Finally, the shortcomings of the existing
research are pointed out, and the suggestions for further research on vibration
response and vibration control during shield construction process are proposed.
The main conclusions are as follows: (1) The vibration in construction is
mainly caused by shield cutter for cutting soil. (2) The properties of soil
around the tunnel are the main factor affecting vibration propagation. (3) When
the shield travels near the adjacent buildings, measures like reducing shield
speed, controlling propulsion force, and cutting torque of the cutter are
effective to reduce the impact of tunnel construction vibration.