建議

1. 由於對於造成乾淨麥寮砂以及乾淨高雄砂的高壓縮性的機制目前並不 清楚，所以仍需進一步的研究以釐清壓縮量的來源。所以作者提出以下 幾項後續的試驗方法以供參考:

(1) 使用均質且相同的人造材料(例如:玻璃或鐵)製作出不同形狀的顆粒 進行壓密試驗以釐清是否扁平顆粒造成壓縮量的增加。

(2) 使用天然的砂土進行試驗(如:麥寮砂、員林砂和高雄砂)，並在不改 變粒徑分佈曲線的條件下，將試體內大部分的扁平顆粒去除之後再

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進行壓密試驗。

(3) 進行大型的壓密試驗，並於壓密試體中裝設高解析度的攝影機觀察 顆粒的排列方式在不同應力狀態下的改變情形。

2. 進 一 步 修 改 MIT-S1 模 式 ， 使 其 能 有 效 的 預 測 過 渡 性 砂 土 ( 例 如:FC=30~50%的麥寮砂，FC=49%的員林砂試體)壓密行為。

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附錄 A

CK

_o

U 試驗在 K

_o

壓密過程中的總體積變化與垂直向體 積變化監測結果

10 20 30 40 50 60

σ

_v

', kPa 0

2 4 6 8 10

Volume change d, ml

ΔV

_(volume)

ΔV

_(axial)

MLS

FC<5%

OCR=1.0

FC<5%的麥寮砂在壓密過程中的體積變化監測結果

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0 20 40 60 80 100 120

σ

_v

', kPa 0

2 4 6 8 10

Volume cha nged, ml

ΔV

_(volume)

ΔV

_(axial)

MLS

FC<5%

OCR=2.0

FC<5%的麥寮砂在壓密過程中的體積變化監測結果

163

0 40 80 120 160 200 240

σ

_v

', kPa 0

2 4 6 8 10

Volume changed, ml

ΔV

_(volume)

ΔV

_(axial)

MLS

FC<5%

OCR=4.0

FC<5%的麥寮砂在壓密過程中的體積變化監測結果

164

10 20 30 40 50 60

σ

_v

', kPa 0

1 2 3 4 5

Volume changed, m l

MLS FC=15%

OCR=1.0

ΔV

_(volume)

ΔV

_(axial)

FC=15%的麥寮砂在壓密過程中的體積變化監測結果

165

20 40 60 80 100 120

σ

_v

', kPa 0

1 2 3 4 5

Volume cha nged, ml

MLS FC=15%

OCR=2.0

ΔV

_(volume)

ΔV

_(axial)

FC=15%的麥寮砂在壓密過程中的體積變化監測結果

166

0 40 80 120 160 200 240

σ

_v

', kPa 0

2 4 6 8 10

Volume changed, ml

MLS FC=15%

OCR=4.0

ΔV

_(volume)

ΔV

_(axial)

FC=15%的麥寮砂在壓密過程中的體積變化監測結果

167

10 20 30 40 50 60

σ

_v

', kPa 0

2 4 6 8 10

Volume changed, ml

MLS FC=30%

OCR=1.0

ΔV

_(volume)

ΔV

_(axial)

FC=30%的麥寮砂在壓密過程中的體積變化監測結果

168

0 20 40 60 80 100 120

σ

_v

', kPa 0

2 4 6 8 10

Volume changed, ml

MLS FC=30%

OCR=2.0 ΔV

_(volume)

ΔV

_(axial)

FC=30%的麥寮砂在壓密過程中的體積變化監測結果

169

0 40 80 120 160 200 240

σ

_v

', kPa 0

4 8 12 16 20

Volume changed, ml

MLS FC=30%

OCR=4.0 ΔV

_(volume)

ΔV

_(axial)

FC=30%的麥寮砂在壓密過程中的體積變化監測結果

170

10 20 30 40 50 60

σ

_v

', kPa 0

2 4 6 8 10

Vol ume change d, ml

MLS FC=50%

OCR=1.0

ΔV

_(volume)

ΔV

_(axial)

FC=50%的麥寮砂在壓密過程中的體積變化監測結果

171

0 20 40 60 80 100 120

σ

_v

', kPa 0

2 4 6 8 10

Volume cha nged, ml

MLS FC=50%

OCR=2.0

ΔV

_(volume)

ΔV

_(axial)

FC=50%的麥寮砂在壓密過程中的體積變化監測結果

172

0 40 80 120 160 200 240

σ

_v

', kPa 0

4 8 12 16 20

Volume cha nged, ml

MLS FC=50%

OCR=4.0

ΔV

_(volume)

ΔV

_(axial)

FC=50%的麥寮砂在壓密過程中的體積變化監測結果

在文檔中 台灣中南部粉土質細砂的壓縮性 (頁 168-189)