Newsletter 高速鐵路簡訊 . 交通部高速鐵路工程局
機場捷運振動敏感區S7區段(A6站至A7站間)浮動式道床軌道材料測試驗證 Rail Material Test and Verification for TIAA MRT S7 Section (A6-A7) Floating Slab Track
整體性能驗證測試-疲勞測試200萬週次

機場捷運於A6站至A7站間之振動敏感區編號S7之軌道配置型態為交叉橫渡線(由4組道岔及1組菱形岔心構成),其與一般軌道型式之軌床相較,此區軌床形體係配合道岔與菱形岔心組合後施築,屬體積龐大之混凝土版塊集合體;基於需符合施工安裝調整及營運後之維修檢視和抽換作業便利性,故採用單一支承橡膠墊與鋼質套筒結合之整體設計做為浮動式道床之減振機制(單一支承橡膠墊可經由鋼質套筒內部機構進行抽換)。整體測試係委由國立雲林科技大學材料檢測中心辦理,於101年10月23日起進行測試,依材料規範要求以最小載重10kN至最大載重104kN與2.5Hz之頻率進行兩百萬週次疲勞測試,測試完成後,再加載至220kN進行極限載重試驗,確認符合規範要求後,始認定S7區段之減振機制通過整體性能驗證測試。其中執行疲勞試驗前預壓靜態載重試驗加載至104kN時,單一支承橡膠墊之變位為3.47mm,之後進行疲勞測試並於反覆加載至40萬、80萬、120萬、145萬、170萬、190萬及200萬週次均設查核點,以檢視試體各零件之表現,此項測試歷時10天,測試結果顯示試體滿足疲勞試驗之允收標準。接續進行之極限載重試驗,本試驗最高加載至設備最大能量475kN後即卸除載重結束試驗。經檢視試體各部組件並未發現有破壞現象,顯現S7區段採用之減振組合力學驗證功能遠高於規範要求。

The rail distribution patterns of TIAA MRT vibration-sensitive S7 section (A6~A7) consists of intersecting crossovers (including 4 sets of turnouts and 1 set of diamond crossing). Comparing to normal track styles, the road bed style of this section is a construction with turnouts and diamond crossing combinations which forms an integrated mass of concrete slabs. Concerning the installation regulations and the convenience of maintenance and replacement after official operation, the single rubber bearing and steel sleeve combination was adopted for the vibration control mechanism of this floating slab track (the single rubber bearing can be replaced via the sleeve's interior mechanism). The integral testing of vibration reduction design and functionality was consigned to the Service Center of Construction Technology and Materials of National Yunlin University of Science and Technology which began on Oct. 23 2012. They started with the regulated 2 millioncycle fatigue test from minimum load 10kN to maximum load 104kN setting frequency at 2.5Hz, and followed with a 220kN ultimate load test. Upon passing both of the tests, the single rubber bearing and steel sleeve combination design for S7 section vibration control was then acknowledged to conform to regulation. First, the single rubber bearing showed 3.47 mm displacement upon 104kN pre-test static load. Then, during the 10-day fatigue test, there were numerous check points respectively at 400 thousand, 800 thousand, 1.2 million, 1.45 million, 1.7 million, 1.9 million and 2 million cycles during continuous load increase. The purpose of setting numerous check points is to thoroughly test the performance of each and every part of the design in which the test results showed the objective fulfilling the standards. Lastly, the ultimate load test took place in which the load was added up to 475kN. Upon completion of the series of test, components of the objective showed no signs of damage which indicated that the vibration reduction design performance not only met the regulated standards but exceeded greatly.

  • 整體性能驗證測試-475kN極限載重試驗
  • 分享: