A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for backfilling old civil air defense tunnel under urban water-rich stratum
The invention provides a backfilling method for an old civil air defense tunnel under an urban water-rich stratum. The backfilling method is characterized by comprising the following steps that S1, sand for tunnel backfilling is prepared, specifically, the sand for backfilling is stacked at an outlet of the civil air defense tunnel or near a vertical shaft; s2, a sand blowing working pit is constructed, specifically, the sand blowing working pit is constructed on the periphery of the backfill sand stacked in the step S1; s3, dewatering in the tunnel is pumped and drained through an outlet of the civil air defense tunnel or a vertical shaft by using a submersible pump, so that the water level in the tunnel is lowered to the position 1-2 m below the vault of the civil air defense tunnel, and a construction space is provided for follow-up operation; s4, pipeline arrangement; s5, sand blowing of the film bag; and S6, grouting construction is conducted. The construction method solves the problems that when the old civil air defense tunnel is backfilled with conventional foam concrete, water pumping potential safety hazards are large, the construction cost is high, the construction period is long, and the urban site is limited.
本发明提供了一种城市富水地层下老旧人防隧洞回填方法，其特征在于包括如下步骤：S1、隧洞回填用砂准备：将回填用砂堆放在人防隧洞出口或者竖井附近处；S2、施工吹砂工作坑：在步骤S1堆放的回填用砂周边施作吹砂工作坑；S3、洞内降水通过人防隧洞出口或者竖井利用潜水泵抽排水，使洞内水位下降至人防隧洞拱顶以下1～2m处即可，以为后续作业提供施工空间；S4、管道布置；S5、膜袋吹砂；S6、注浆施工。本发明施工方法解决了老旧人防隧洞采用常规泡沫混凝土回填时，抽水安全隐患大、施工费用高、工期长、城市场地受限等问题。
Method for backfilling old civil air defense tunnel under urban water-rich stratum
The invention provides a backfilling method for an old civil air defense tunnel under an urban water-rich stratum. The backfilling method is characterized by comprising the following steps that S1, sand for tunnel backfilling is prepared, specifically, the sand for backfilling is stacked at an outlet of the civil air defense tunnel or near a vertical shaft; s2, a sand blowing working pit is constructed, specifically, the sand blowing working pit is constructed on the periphery of the backfill sand stacked in the step S1; s3, dewatering in the tunnel is pumped and drained through an outlet of the civil air defense tunnel or a vertical shaft by using a submersible pump, so that the water level in the tunnel is lowered to the position 1-2 m below the vault of the civil air defense tunnel, and a construction space is provided for follow-up operation; s4, pipeline arrangement; s5, sand blowing of the film bag; and S6, grouting construction is conducted. The construction method solves the problems that when the old civil air defense tunnel is backfilled with conventional foam concrete, water pumping potential safety hazards are large, the construction cost is high, the construction period is long, and the urban site is limited.
本发明提供了一种城市富水地层下老旧人防隧洞回填方法，其特征在于包括如下步骤：S1、隧洞回填用砂准备：将回填用砂堆放在人防隧洞出口或者竖井附近处；S2、施工吹砂工作坑：在步骤S1堆放的回填用砂周边施作吹砂工作坑；S3、洞内降水通过人防隧洞出口或者竖井利用潜水泵抽排水，使洞内水位下降至人防隧洞拱顶以下1～2m处即可，以为后续作业提供施工空间；S4、管道布置；S5、膜袋吹砂；S6、注浆施工。本发明施工方法解决了老旧人防隧洞采用常规泡沫混凝土回填时，抽水安全隐患大、施工费用高、工期长、城市场地受限等问题。
Method for backfilling old civil air defense tunnel under urban water-rich stratum
一种城市富水地层下老旧人防隧洞回填方法
LIU QIAO (author) / XIE MIN (author) / WANG XIANRONG (author) / YU XIYANG (author) / ZHOU PU (author) / YI QIANG (author) / YIN JIANLE (author) / WEI LIN (author) / ZHENG LIYUAN (author) / LIU SHENGMING (author)
2024-12-17
Patent
Electronic Resource
Chinese
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