邊坡穩定補強案例探討

Case study on reinforcement of slope stability

石秋炎(Chiu-Yen Shih)

指導教授 ： 倪至寬

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00364

摘要

本研究係對新北市新莊、泰山與桃園縣龜山交界之山坡地工址，於邊坡之坡趾進行開挖時，坡頂縱深距離約一百公尺路面發現局部開裂，坡頂鄰近建築物牆面、地表及瀝青路面產生不規則沉陷龜裂，邊坡疑似有滑動變位疑慮，邊坡工址山坡因大面積之開挖，截斷坡趾部位，引起附近住戶高度關切並質疑住屋安全性情況下，住戶聯盟及外圍團體依此議題陳情抗爭不斷，因此，後續工程如何進行補強復建，以確保安全，遂成為各界關切聚焦議題。
基地邊坡於開挖解壓後進行補強復建，以增設排樁、加裝地錨及加密監測儀器頻率因應，檢視加強後監測數值，安全性仍未臻理想，經檢討評估後，依地形地物現況，部分採用對既有設施影響最小之「明挖覆蓋工法」，取代原開放空間作法，部分於坡趾地表下打設抗滑群樁，樁頂以網狀繫樑連接，以固結坡趾地表下地層，形成反力結構版塊，以防制邊坡滑動破壞。
文中蒐集二年施工期間，邊坡變位等監測資料，探討可能之滑動機制，對補強工程進行監測數據之回饋分析。本研究內容，期望能對有類似地質條件之規劃開發、設計施工者有些許助益。

關鍵字

邊坡解壓 ； 滑動機制 ； 回饋分析 ； 地錨

並列摘要

This research is studying a case history of slope sliding, located at the border of Sin Jhuang, Taishan and Guishan regions. Due to the excavation of the toe of this slope, a series of tension cracks appears on this large slope area indicating a sliding slope is pending, on which buildings and asphalt pavement roadways are troubled by differential settlements and tensile cracks. Residents in this area request the authority to provide a safe living environment and ask for the immediate suspension. How to reinforce the unsafe slope become an important issue.
The authority takes the following remedial measures by adding additional retaining piles with anchors, and increasing the monitoring items and frequency. The monitoring results are used to assess the safety of slope and justice of these remedial measures. In addition, a cut and cover method is adopted to replace the original open cut method. This underground structure will provide stability to the sliding slope.
This research studies the remedial measures, feed-back numerical analysis and two years’ monitoring data. Hopefully the results from this study can benefit the future planning, designing and constructing of those projects in the similar geological condition.

並列關鍵字

Slope Decompression Effect ； Slide Failure ； Feedback Analysis ； Anchor

參考文獻

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