杭 级 级 机 购 咨采 筑 技 术
Architecture Technology ?5 1卷 第1 0期2 0 2 0年1 0月
Vol.51 No. 10 Oct. 202056de%fg
®-EFV ?hi■ - l ■ ^??■ ?}? ? u ~ 2 ^ ? d ? A ? ( h t p u K Q t p ■ X . . . X . ? ? ? y z:隧道二次衬砌是隧道施工的关键工序,隧道二次衬砌的保护层问题一直是隧道工程施工的质量
通病。二衬钢筋保护层厚度是重要的分项施工内容,其施工质量直接关系到二衬结构的稳定性和使用寿命。
分析影响二衬保护层质量的因素,采用施工交底、测量放样、钢筋定位和安放保护层垫块的方法控制二衬钢
筋保护层厚度,增强了合格率,提高了工效,取得了良好的效果。高 端 综:公路隧道;二次衬砌;保护层目 合 体 C H: TU 74 文 献 标 志 码: B 文 章 编 号 :1000-4726(2020)10-1194-02J)-8?53 i1M5418 1Q 2415pi5?lp 8-3p4 1Q 6pi1M7
LINING OF TUNNELZHANG Shi-gui, XU Lei, LIU Hong-wei, ZHANG Hong-yuani:mCbd Construction Second Engineering Bureau Co., Ltd., 100010, Beijing, China)质•诫075真0” Tecondary lining o f tunnel is the key process o f tunnel construction. The problem of
the secondary lining protective layer o f tunnels has always been a common quality problem o f tunnel
construction. The thickness of the secondary lining steel protective layer is an important sub-construction.
Its construction quality is directly related to the stability and service life o f the secondary lining
structure. After analyzing the factors influencing the quality o f the second liner protective layer, the
thickness of the second liner protective layer is controlled by the methods of construction verification,
measuring lofting, steel bar positioning and security protection layer pads, which enhances the pass rate
and improves the work efficiency, and has achieved good results.•ecT/maFC highway tunnel; secondary lining; protective layerd e ? u ■% f g
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