水工隧洞中回填及固结灌浆施工技术的应用分析

Application Analysis of Backfilling and Consolidation Grouting Construction Technology in Hydraulic Tunnel

摘要

引水、泄洪等水工隧洞衬砌完成后，背后空腔与围岩裂隙若处理不当，运行期易出现渗漏、空鼓与局部受力异常。回填与固结灌浆是常用的隐蔽加固工序，需在受限空间内完成制浆、输浆、排气、稳压与封孔，并与衬砌养护和洞内排水同步组织。在TBM管片、富水破碎带与岩溶洞段，工艺组织更应强调隔离止水、排气导排与复灌安排。本文结合现行规范与典型工程案例，就水工隧洞提炼回填与固结灌浆两项施工技术可执行控制点。

Abstract

When lining is completed in hydraulic tunnels for water diversion or flood discharge, improper treatment of the back cavity and surrounding rock fractures may lead to leakage, voids, and localized stress anomalies during operation. Backfilling and consolidation grouting, as common concealed reinforcement procedures, require simultaneous execution of slurry preparation, delivery, degassing, pressure stabilization, and hole sealing within confined spaces, coordinated with lining curing and tunnel drainage. In TBM segments, water-rich fractured zones, and karst tunnel sections, the process must emphasize water isolation, degassing, drainage, and re-grouting scheduling. This paper identifies actionable control points for backfilling and consolidation grouting based on current standards and typical engineering cases.

关键词

水工隧洞 / 回填 / 固结 / 灌浆 / 施工技术 / 应用

Key words

Hydraulic tunnel / Backfilling / Consolidation / Grouting / Construction technology / A pplication

参考文献

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