書籍介紹
本署自80年代起陸續設置磁環式地層下陷分層監測井(以下簡稱地陷監測井)，藉以了解不同深度土壤分層主要壓縮狀況。迄110年底已於彰化及雲林地區設置36口地陷監測井，並持續進行井體維護與量測工作。地陷監測井有其定點長期監測分層地層下陷之優勢，用地小、使用年限長及量測再現性佳等優點。監測井內不同深度安裝磁環(約25環)，透過每月人力定常現地量測磁環位移，可同時掌握各分層下陷變化。配合不同深度之地下水位觀測資料，掌握不同深度土層之應力與應變關係，可作為地層下陷成因探討及防治措施研擬之參據，迄今除新建井外，已大致可得知各地陷監測井主要壓縮土層。
本署已於106年訂定「磁環分層式地層下陷監測井量測及分析作業須知」俾以規範量測成果品質，考量建置久，地陷監測井量測導管可能因地層壓縮進而彎曲及井內磁環磁力隨時間而衰退，除造成量測困難外，亦可能影響磁環位置之量測結果，進而影響分層土壤地層下陷之判釋。爰此，本計畫將評析量測導管彎曲度及磁環衰退對下陷量測及精度之可能影響，提出量測結果適用性之建議，藉由掌握現地監測井井況及磁環特性，研擬可行之改善方案或量測方法，作為後續地陷監測井維護及汰舊換新參考，提升整體設備於現地分層及穩定之量測效能。
目次
摘要 I
目錄 II
圖目錄IV
表目錄VIII
壹、前言1 1
一、計畫緣起及目的································ ··························· 1 1
二、計畫工項································ ································ ···· 1 1
貳、量測導管垂直度對量測結果之影響評估2 1
一、釐清現有地陷監測井量測機制································ ········· 2 1
二、評估導管垂直度對量測結果之可能影響 ····························· 2 5
參、量測導管彎曲度檢測技術評估及應用評析3 1
一、蒐集並評估可量測地陷監測井量測導管彎曲度之可能檢測技術及方法 ································ ································ ········ 3 1
二、評析地陷井量測導管彎曲度之相關設備可行性···················· 3 4
肆、量測導管彎曲度現地檢測及評析4 1
一、量測導管彎曲度現地檢測································ ··············· 4 1
二、評析導管之彎曲度································ ······················· 4 23
伍、磁環特性檢測及量測精度影響探討5 1
一、磁環特性及井況檢測至少 10 口，深度至少達 200 米 ··········· 5 1
二、量測精度之影響探討································ ···················· 5 41
陸、結論與建議6 1
一、結論································ ································ ·········· 6 1
二、建議············································································································································ 66--22
柒、參考文獻........................................................................................................................................................................................................ 77--11
附錄一 期中報告書審查意見回覆情形期中報告書審查意見回覆情形 ...................................................................................................... 附附11--11
編／著／譯者簡介
經濟部水利署,國立成功大學
分類
其他詳細資訊
- 適用對象：成人(學術性)
- 關鍵詞：地層下陷 ,監測井
- 附件：CD-ROM
- 頁/張/片數：128
授權資訊
- 著作財產權管理機關或擁有者：經濟部水利署
- 取得授權資訊：聯絡處室：綜合企劃組
姓名：彭家怡
電話：02-37073057
地址：台北市信義路3段41-3號11樓