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針對高速公路護欄的評價主要依據裂縫情況、基本尺寸、變形情況、固定及搭接等情況對外觀指標進行評價。 

(1)護欄基本尺寸的評價。對護欄基本尺寸的測量主要包括護欄板厚度、立柱壁厚度、立柱壁長度和基地金屬厚度,其中立柱壁厚度可以通過測量工具測量獲取,立柱長度可以采用拉線的方式獲取,基地金屬厚度、護欄板厚度可以采用千分尺測量,之后將所測量出的數據與相應的規范及標準進行對比,若一項超出規范和標準值,那么則應減去3分。 

(1) e valuation of the basic dimensions of guardrail. The measurements of basic sizes of guardrails mainly include the thickness of guardrails, the thickness of column walls, the length of column walls and the thickness of base metals. The thickness of column walls can be measured by measuring tools, the length of columns can be obtained by pulling wires, the thickness of base metals and guardrails can be measured by micrometers, and then the thickness of base metals and guardrails can be measured by micrometers. Comparing the measured data with the corresponding specifications and standards, if one item exceeds the specifications and standards, then 3 points should be subtracted.

(2)護欄裂縫評價。對于護欄能否再利用來說,護欄外觀上的裂縫也是對其進行有效評價的關鍵指標,包括立柱頂部開裂、邊緣開裂兩項。當護欄出現開裂情況時,可以采用直尺的方式進行裂縫長度的測量,若所測的裂縫長度處于10~20毫米之間時稱為輕微裂縫,若裂縫大于10毫米時應該減去2分。 

(2)hù lán liè féng píng jià 。duì yú hù lán néng fǒu zài lì yòng lái shuō ,hù lán wài guān shàng de liè féng yě shì duì qí jìn háng yǒu xiào píng jià de guān jiàn zhǐ biāo ,bāo kuò lì zhù dǐng bù kāi liè 、biān yuán kāi liè liǎng xiàng 。dāng hù lán chū xiàn kāi liè qíng kuàng shí ,kě yǐ cǎi yòng zhí chǐ de fāng shì jìn háng liè féng zhǎng dù de cè liàng ,ruò suǒ cè de liè féng zhǎng dù chù yú 10~20háo mǐ zhī jiān shí chēng wéi qīng wēi liè féng ,ruò liè féng dà yú 10háo mǐ shí yīng gāi jiǎn qù 2fèn 。 


公路護欄


(3)焊接。對護欄焊接的評價需要通過對焊接縫是不是存在裂紋進行目測,然后再通過超聲探傷儀進行裂縫寬度的測量,若存在裂紋則應該減去2分。 

(3) welding. The e valuation of guardrail welding requires visual inspection of whether there is a crack in the weld seam, and then measurement of crack width by ultrasonic flaw detector. If there is a crack, 2 points should be subtracted.

(4)護欄固定及搭接情況。對護欄固定及搭接情況進行評價的內容涉及搭接方向、護欄板螺栓銹蝕程度等。若銹蝕面積超過40%,則應在總分的基礎上減去2分。 

(4)hù lán gù dìng jí dā jiē qíng kuàng 。duì hù lán gù dìng jí dā jiē qíng kuàng jìn háng píng jià de nèi róng shè jí dā jiē fāng xiàng 、hù lán bǎn luó shuān xiù shí chéng dù děng 。ruò xiù shí miàn jī chāo guò 40%,zé yīng zài zǒng fèn de jī chǔ shàng jiǎn qù 2fèn 。

(5)護欄變形評價。護欄變形評價主要是對護欄立柱垂直、協調性情況進行目測,然后采用直尺、拉線等方式對護欄板的豎直度、順直度進行測量,其豎直度要控制在±10內,順直度應該控制在±5內,若超出則需要減掉5分。 

(5) e valuation of guardrail deformation. The e valuation of guardrail deformation is mainly to visualize the vertical and coordinated situation of the guardrail column, and then to measure the verticality and straightness of the guardrail board by means of ruler and cable. Its verticality should be controlled within (+) 10, its straightness should be controlled within (+) 5, and if it exceeds, it needs to be reduced by 5 points.


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