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高熙賀

 

（ 楊凌職業(yè)技術學院交通 與測繪工程分院 ，陜西 楊凌 712100)

摘   要 ：軟土地層通常具有較低的承載力和較高的壓縮性，隧道開挖過程中極易發(fā)生變形和坍塌。為了控制圍巖的變形和破壞 ，確保施工安全，提出軟土地層隧道圍巖分區(qū)初期支護技術。通過合理規(guī)劃圍巖壓力監(jiān)測點 ，采集壓力數(shù)據(jù)；利用簡化的錨桿 、鋼架及巖體結構面 ，構建初期支護本構模型；計算錨桿與鋼架的最佳間距和長度 ，并以此為依據(jù)設計復合支護結構，實現(xiàn)圍巖分區(qū)初期支護。結果表明：所提方法隧道沉降位移較小、塑性區(qū)分布面積較小。體現(xiàn)了支護技術的有效性，具有較好的應用價值。

關鍵詞：軟土地層隧道 ；初期支護 ；圍巖壓力 ；錨桿應力 ；鋼架應力

中圖分類號：U457           

文獻標志碼：A            

文章編號： 1005- 8249   (2024)  04- 0087- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.04.015

 

GAO Xihe

(Yangling Vocational and Technical College Traffic and Surveying Engineering Branch ,  Yangling 712100 ,  China) 

Abstract:Soft ground layer usually has low bearing capacity and high compressibility, and collapse and deformation are very easy to occur during tunnel excavation. In order to effectively control the deformation and damage of the surrounding rock and ensure the construction safety, the initial support technology for the surrounding rock of the tunnel in soft ground layer in zones is proposed. Pressure data are collected by reasonably planning the peripheral rock pressure monitoring points. Construct the initial support intrinsic model by using the simplified anchor rods, steel frame and rock structure surface. Calculate the optimal spacing and length of anchor rods and steel frames, and design the composite support structure based on them to realise the initial support in the surrounding rock zones. The results show that the proposed method of tunnel settlement displacement is small, and the distribution area of plastic zone is small. It reflects the effectiveness of the support technology and has good application value.

Keywords :  tunnel in soft soil stratum;  initial support;  surrounding rock pressure;  bolt  stress;  steel frame stress

作者簡介： 高熙賀  (1983—) ,   男 ，碩士 ， 副教授 ，研究方向 ：地質工程 、巖土工程 、城市軌道交通工程技術 、城市軌道交 通運營管理。

收稿日期：2023- 05- 24