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单词 Pot hole
释义

Pot hole

中文百科

壶穴 Pothole

(重定向自Pot hole)
壶穴
壶穴形成示意图
Bourke's Luck Potholes in the Blyde River Canyon of South Africa is the result of erosion caused by pebbles.
Collection of pebbles shaped in giant's kettles

壶穴是在河流上游经常出现的一种地理特征。由于雨水令河水流量增加,带动上游的石块向下游流动,当石块遇上河床上的岩石凹处无法前进时,会被水流带动而打转,经历长时间后将障碍磨穿,形成一圆形孔洞,称为壶穴。

漩涡状水流,更加速壶穴的挖掘与形成。急流或瀑布流水自由落体的撞击,亦可产生壶穴,所谓滴水穿石,可产生圆柱状甚至凿穿岩块而形成如管状的壶穴。而平流的水流或海流于悬崖或河道转弯处可能改变成扰流,漩涡水流的挖凿亦可能形成悬崖峭壁或河岸岩壁的壶穴。

英语百科

Pothole 壶穴

(重定向自Pot hole)
Factors leading to pothole failure by fatigue in areas subject to freezing and thawing are: 1. Precipitation adds moisture to supporting soil structure. 2. Frost heaving can damage pavement. 3. Thawing can weaken soil structure. 4. Traffic can break the pavement.
A deep pothole with a nearby patched area on New York City's Second Avenue.

A pothole is a type of failure in an asphalt pavement, caused by the presence of water in the underlying soil structure and the presence of traffic passing over the affected area. Introduction of water to the underlying soil structure first weakens the supporting soil. Traffic then fatigues and breaks the poorly supported asphalt surface in the affected area. Continued traffic action ejects both asphalt and the underlying soil material to create a hole in the pavement.

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更新时间:2025/6/18 7:14:40