Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Air bag support construction method for guaranteeing safety of shield tunnel underneath passing pipeline
The invention relates to an air bag support construction method for ensuring the safety of a shield tunnel underneath passing pipeline, which comprises the following steps: manufacturing an air bag and arranging the air bag at the bottom of the pipeline, and filling fine sand in a gap between two tunnels and between the air bag and a working surface; the air bag is inflated, so that the air bag expands to be tightly attached to the pipeline and the fine sand; when the distance between the shield tunneling machine and the pipeline is 6-8 times of the diameter of the shield tunnel, a strain change accumulated value epsilon t starts to be monitored, the air bags are inflated step by step through an air compressor, and the strain change accumulated value epsilon t is always controlled within 0.5 times of the maximum allowable tensile strain [delta epsilon t] of the bottom of the pipeline at the intersection position of the shield tunnel and the pipeline plane projection; if the condition that the strain change accumulated value epsilon t within 3 days is smaller than 0.05 times [delta epsilon t] is met, strain observation can be stopped, and grouting is conducted in the air bag; and recovering the ground after 7-10 days. The invention provides a construction method which effectively ensures the safety of the pipeline, is efficient, low in cost and simple to operate, and is mature in technology and beneficial to popularization.
本发明涉及一种保证盾构隧道下穿管道安全的气囊支护施工方法，包括：制作气囊并布置在管道底部、两隧道之间，气囊与工作面的空隙间填充细沙；对气囊进行充气，使得气囊膨胀紧贴管道与细沙；在盾构机距离管道6～8倍盾构隧道直径时开始监测应变变化累计值εt，通过空气压缩机逐级逐个对气囊进行充气，始终将应变变化累计值εt控制0.5倍盾构隧道与管道平面投影相交位置处管道的底部容许最大拉应变[Δεt]内；如满足在3天内的应变变化累计值εt小于0.05倍[Δεt]时的条件，可停止应变观测并向气囊内灌浆；7～10天后恢复地面。本发明提供了有效保证管道安全的高效、低成本、操作简单的施工方法，技术成熟、利于推广。
Air bag support construction method for guaranteeing safety of shield tunnel underneath passing pipeline
The invention relates to an air bag support construction method for ensuring the safety of a shield tunnel underneath passing pipeline, which comprises the following steps: manufacturing an air bag and arranging the air bag at the bottom of the pipeline, and filling fine sand in a gap between two tunnels and between the air bag and a working surface; the air bag is inflated, so that the air bag expands to be tightly attached to the pipeline and the fine sand; when the distance between the shield tunneling machine and the pipeline is 6-8 times of the diameter of the shield tunnel, a strain change accumulated value epsilon t starts to be monitored, the air bags are inflated step by step through an air compressor, and the strain change accumulated value epsilon t is always controlled within 0.5 times of the maximum allowable tensile strain [delta epsilon t] of the bottom of the pipeline at the intersection position of the shield tunnel and the pipeline plane projection; if the condition that the strain change accumulated value epsilon t within 3 days is smaller than 0.05 times [delta epsilon t] is met, strain observation can be stopped, and grouting is conducted in the air bag; and recovering the ground after 7-10 days. The invention provides a construction method which effectively ensures the safety of the pipeline, is efficient, low in cost and simple to operate, and is mature in technology and beneficial to popularization.
本发明涉及一种保证盾构隧道下穿管道安全的气囊支护施工方法，包括：制作气囊并布置在管道底部、两隧道之间，气囊与工作面的空隙间填充细沙；对气囊进行充气，使得气囊膨胀紧贴管道与细沙；在盾构机距离管道6～8倍盾构隧道直径时开始监测应变变化累计值εt，通过空气压缩机逐级逐个对气囊进行充气，始终将应变变化累计值εt控制0.5倍盾构隧道与管道平面投影相交位置处管道的底部容许最大拉应变[Δεt]内；如满足在3天内的应变变化累计值εt小于0.05倍[Δεt]时的条件，可停止应变观测并向气囊内灌浆；7～10天后恢复地面。本发明提供了有效保证管道安全的高效、低成本、操作简单的施工方法，技术成熟、利于推广。
Air bag support construction method for guaranteeing safety of shield tunnel underneath passing pipeline
一种保证盾构隧道下穿管道安全的气囊支护施工方法
YAN JINSHUO (Autor:in) / ZHANG KEXIN (Autor:in) / GONG CHAOFAN (Autor:in) / XUE XINGWEI (Autor:in)
12.04.2024
Patent
Elektronische Ressource
Chinesisch
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