Kev muab cov paib tsheb: kev nkag siab zoo ntawm cov chaw tsheb
1. Cov chaw tsheb loj tau teeb tsa rau plaub pawg: guardrails, chaw cais, tiv thaiv- glare chaw, thiab pom- cov chaw taw qhia.
2. Raws li cov qauv, txoj kev loj guardrails muab faib ua peb pawg: nruj guardrails (khoom vaj huam sib luag), semi-rigid guardrails (wave beam guardrails) thiab saj zawg zog guardrails (cable guardrails).
3. Raws li kev siv cov guardrails nthuav dav, nws tuaj yeem muab faib ua peb hom: txoj kev guardrails, central divider guardrails thiab choj guardrails.
4. Kab ntawm cov kev taw qhia pom muaj xws li delineation marks, sub-ua ke cov cim taw qhia thiab cov cim qhia lossis ceeb toom cov kab lus qhia (Ceeb toom: Txoj Kev Tshiab yog ib qho ntawm cov ntawv).
5. Muaj ob qib ntawm A thiab S rau kev tiv thaiv ntawm txoj kev, thiab ob qib ntawm Am thiab Sm rau kev tiv thaiv ntawm lub hauv paus divider. Qhov kawg ntawm ob qib yog hom kev txhawb zog.
6. Qhov tsawg kawg nkaus qhov ntev ntawm txoj kev guardrail yog 70m, thiab qhov deb ntawm qhov chaw ntawm S- theem guardrail kab yog 2m.
7. Kev sib cais hauv nruab nrab ntawm txoj siv sia thiab cov chaw sib cais ntawm txoj kev yuav tsum tau teeb tsa rau ntawm txoj kev loj thiab ua ntej - cov kev loj hauv chav kawm, thiab cov choj guardrails yuav tsum tau teeb tsa ntawm cov choj super, cov choj loj thiab nruab nrab saum lawv.
8. Cov cim contour yuav tsum tau teem tsis tu ncua ntawm tag nrho cov kab ntawm txoj kev loj thiab thawj -cov kev loj hauv chav kawm, thiab qhov kev ncua sij hawm ntawm txoj kab ncaj nraim yuav tsum yog 50m.