在地质勘探工作中，浅井采用得较多，而一般浅井都掘进于浮土或软岩中。为了保证安全，必须进行支护。由于木材较贵，同时将木材锯成木板，也需很多人力，尤其是有些地方缺乏木材，须从别地运来，以致成本增高。 In geological exploration work, shallow wells are used more often, while shallow wells are usually excavated in floating soil or soft rock. In order to ensure safety, support must be carried out. As wood is more expensive, at the same time wood is sawn into planks, which also requires a lot of manpower, especially in some places where there is a lack of timber, which must be transported from other places, resulting in higher costs.