本研究以實際之建造過程及長期追蹤觀測証明EPS(發泡聚苯乙烯,Expanded Poly-Strolene)在適當的製造及施工條件下堪用為重要公路之路堤填方材料。所建造之試驗路堤位於西部濱海公路(台17線)133k+740至133k+770,其長30m,寬6.9m,高1.9m。本文先從各種觀點探討以EPS為路基填方材料之特性,並描述此一試驗路堤之規劃及興建過程。本研究亦對於試驗路堤之堪用性進行追蹤觀測,量測內容包括EPS塊體之壓縮量、路面之高程及撓度等。量測結果顯示本EPS路面之可撓性略大於鄰近一般填土路堤,但其差異性很小。本路堤經歷3年半之追蹤觀測,瀝青路面及路堤側壁無龜裂及其他異狀,堪為台灣第一個成功的EPS路堤案例。
A 30m long, 6.9m wide and 1.9m highway embankment using super-light EPS (Expand Poly-Styrolene) as subbase material was successfully constructed. The test embankment has been performing satisfactorily under heavy traffic for three and half years. Some fundamental aspects of the design on the EPS test embankment was reported. The construction process, the monitoring system, and the results of long-term monitoring were also reported.