为应对不断变化的防水需求,接缝防水体系经过不断演化,产生了多种布置方式,但当前业内对各种布置形式的接缝防水体系尚未有统一的描述。为便于统一指代,调研分析国内各种盾构隧道管片接缝防水的发展过程,针对盾构隧道管片接缝防水体系特征提出代系划分方法,并详细阐述各代系的构造特征及主要适用范围,具体包括3代: 采用单道三元乙丙橡胶密封垫的第1代接缝防水体系,以单道三元乙丙橡胶+遇水膨胀弹性体形成“一主一辅”的第2代接缝防水体系,以双道三元乙丙橡胶密封垫为主体的第3代接缝防水体系。最后,结合目前大型水下盾构隧道的建设需求,从防水体系韧性、极端工况下防水体系及密封垫受力状态下耐久性等方面提出接缝防水体系今后的发展趋势。
肖明清
,
谢宏明
,
王士民
,
钟元元
. Evolution and Prospects of Shield Tunnel Joints and Segment Waterproofing Systems(盾构隧道管片接缝防水体系演化历程与展望)[J]. 隧道建设, 2021
, 41(11)
: 1891
-1902
.
DOI: 10.3973/j.issn.2096-4498.2021.11.006
To meet changing waterproof demands, joint
waterproofing systems have evolved and produced a variety of layout modes, but
there is no unified description of a joint waterproofing system of various
layout forms in the industry. To unify this topic, the evolution of various
shield tunnel segment joint waterproofing systems in China is investigated and
analyzed, and the structural characteristics and main application scope of each
system generation are elaborated on. The existing joint waterproofing systems
have been systematically classified: the traditional first generation joint
waterproofing system used single ethylene propylene diene monomer (EPDM)
elastic sealing gaskets, the second generation adopted a single EPDM gasket and
water swelling rubber, and the third generation adopted double EPDM gaskets
with or without water swelling rubber. Finally, combined with the current
construction needs of largescale underwater shield tunnels, the
developmental trends of joint waterproofing systems in the future are put
forward with respect to the toughness of the waterproofing system, extreme
environmental conditions, and durability of the gasket under stress.