10.01.2015 Views

山區道路邊坡崩塌防治工法最佳化研究(一) - 國家災害防救科技中心

山區道路邊坡崩塌防治工法最佳化研究(一) - 國家災害防救科技中心

山區道路邊坡崩塌防治工法最佳化研究(一) - 國家災害防救科技中心

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

unlined trenches <br />

French drains <br />

<br />

<br />

<br />

<br />

<br />

cut-off drain<br />

<br />

shallow impermeable layer<br />

<br />

tension crack<br />

6.2.4 <br />

<br />

gradient<br />

<br />

1.3 /<br />

600 <br />

Ackers(1969)<br />

<br />

4 /<br />

roughness<br />

factor 0.013<br />

V<br />

1<br />

0.5<br />

= [R<br />

0.67 ⋅ S ]<br />

[6.3]<br />

n<br />

V velocity /<br />

n<br />

rounghness factor<br />

R<br />

hydraulic mean depth P/A<br />

A<br />

wetted cross-sectional area<br />

P wetted perimeter<br />

218

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!