在破碎岩石中钻进,往往取不上岩心,以打捞器取,因其弹片硬而脆,稍一提动,就易折断,特别是松软地层(砂卵石层夹泥层或淤泥层),取样更为困难.为此,我们学习了他单位的经验,以钢丝绳来作打捞器中的弹簧片(过去是用钟表发条作的),因钢丝强度大,具有一定弹性,不易折断,且钢丝绳散开后,成为网状布满钻头,它的特点是能转动,卡簧下掉落,在松软层中钻进,岩心进入岩心管内不会掉下.结构如图所示,先将废旧钢 Drilling in the broken rock, often can not take the core, to take the salvage, because of its hard and brittle shrapnel, a little move, it is easy to break, especially the soft ground (sand and gravel layer of mud or mud layer) Sampling is more difficult.To this end, we learn from the experience of his unit, with wire rope for spring leaves in the salvors (in the past is made of clockwork spring), because of the strength of steel wire, with some flexibility, not easy to break, and After the wire rope is dispersed, it becomes a mesh covered with a drill bit, which is characterized by being able to rotate, dropping under the snap spring, drilling in a soft layer, and the core does not fall into the core pipe structure. As shown in the figure, steel