Proposal on Design of Vertical Pre-Reinforced Bolt Method

竖向预筋锚杆法设计建议

• 批准号: 17560447
• 负责人: NISHIMURA Kazuo
• 金额: $ 2.11万
• 依托单位: Tokyo Metropolitan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560447/
• 关键词: Tunnel; Vertical Pre-Reinforced Bolt Method; Subsidence; Model Test; Auxiliary Method; 垂直縫地工法; 低土被りトンネル; 都市NATM; DEM解析

During tunnel excavation in the area of the entrance of mountain tunnel or shallow tunnel, such many problems as subsidence of the ground surface and collapse of the cutting face of the tunnel or the land slide of the slope above the tunnel sometimes occur. The auxiliary method of coping with such problems, called "Vertical Pre-Reinforced Bolt Method," is adapted to keep the natural surroundings. However, the design of vertical pre-reinforced method based on the experience in respect of the equivalence force between ground movement and rock bolt. It is not a method for sufficiently evaluating the stiffening effect to protect a ground settlement and a land slide. In addition, there is still few data clarifying the effectiveness of this method from field measurements.This study was planned to verify the effectiveness of penetration depth of reinforce members below the bottom section level of the tunnel using model tests with the aim of reducing the width of site area and construction cost. The proposal of the suggested method on the design and construction of vertical pre-reinforced bolt method was pursued.As the result, the vertical pre-reinforced bolt behaved an axis reinforcement model to assist the ground arch of the ground by tunnel excavation. The load of tunnel excavation is effectively distributed in the front and side of the tunnel face by its reinforcement. This research is completed.

在山岭隧道或浅埋隧道入口处隧道开挖过程中，有时会出现地表下沉、隧道断面坍塌或隧道上方边坡滑坡等问题。处理此类问题的辅助方法，称为“竖向预加固锚杆法”，适用于保持自然环境。然而，竖向预加固法的设计是根据地表移动与锚杆等效力的经验进行的。这不是一种充分评估加固效果以保护地面沉降和滑坡的方法。此外，从现场测量中阐明该方法的有效性的数据仍然很少。本研究旨在通过模型试验验证隧道下部水平以下加固构件的侵彻深度的有效性，目的是减少场地面积和施工成本。提出了竖向预加强锚杆的设计与施工建议，结果表明，竖向预加强锚杆在隧道开挖过程中表现为轴向加固模式，辅助地面拱形。隧道开挖荷载通过其加固有效地分布在隧道工作面的前方和侧面。本研究已完成。

项目成果

垂直縫地ボルトの補強効果

竖缝螺栓的加固效果

• 发表时间: 2005
• 期刊: 土木学会第60回年次学術講演会講演概要集 Vol.60-III(CD-ROM)
• 作者: 高橋 能久;西村 和夫;土門 剛
• 通讯作者: 土門 剛

トンネル掘削に伴う地山挙動の予測手法に関する研究

隧道开挖岩石行为预测方法研究

• 发表时间: 2006
• 期刊: 土木学会第61回年次学術講演会講演概要集 Vol.61-3(CD-ROM)
• 作者: 軽部大蔵;宇野尚雄;宇野 尚雄;亀井健史;亀井健史;亀井健史;亀井健史;Takeshi Kamei;亀井健史;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;亀井健史;亀井健史;Takeshi Kamei;亀井健史;亀井健史;亀井健史;亀井健史;亀井健史;亀井健史;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;亀井健史;亀井健史;藤原多聞
• 通讯作者: 藤原多聞

Study on prediction method of ground movement during tunnel excavation

隧道开挖过程地震动预测方法研究

• 发表时间: 2006
• 期刊: The Proc. of the 60^<th>th JSCE Annual Meeting III-066(CD-ROM)
• 作者: 軽部大蔵;宇野尚雄;宇野 尚雄;亀井健史;亀井健史;亀井健史;亀井健史;Takeshi Kamei;亀井健史;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;亀井健史;亀井健史;Takeshi Kamei;亀井健史;亀井健史;亀井健史;亀井健史;亀井健史;亀井健史;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;亀井健史;亀井健史;藤原多聞;FUJIWARA Tamon
• 通讯作者: FUJIWARA Tamon