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打桩机锤头 洛阳锤铸造厂

联系人:朱文杰

咨询热线 :133 3388 9451

固定电话 :0379-64961800

客服信箱 :13333889451@qq.com

地址:河南洛阳 孟津工业园区 隆华大道

网址:www.chongjizuantou.com.cn

不同地质中桩机钻头的应用

不同地质中桩机钻头的应用:近年来,大口径旋挖钻进工法在桩基础施工中得到广泛的推广。在大口径旋挖钻施工中,硬地层钻进是施工中遇到的主要难题之一。通常旋挖施工的硬地层主要有河床(故道)、山地丘陵的含卵砾石、漂石及风化岩层等,钻进这些较硬地层主要采用短螺旋打桩钻头。短螺旋打桩钻头的选择和使用是影响施工效率的重要环节。 短螺旋打桩钻头钻进过程中,首先在钻压下,位于芯轴管底端的中心齿在孔底中心“掏槽”,形成破碎自由面,位于螺旋锥片上的切削具跟进,形成锥形的钻孔,钻进中钻齿形成的轨迹线在孔底的投影是一组同心圆。岩屑和土、石等沿螺旋叶片反向上升,充满螺旋叶片之间后,被提钻带出孔,或落入孔中后,用捞砂钻斗捞出。单锥单螺短螺旋打桩钻头布齿相对较少,一般钻进胶结较松的卵砾石层,特别是卵砾石较多较大的地层和风化岩层。由于单锥单螺钻头叶片间距较大,提钻过程岩屑、土块和碎石易掉落孔中,需要用捞砂斗进行捞砂清底,一般是一钻螺旋打桩钻头,一钻捞砂钻斗,交替进行。很多时候螺旋打桩钻头起到的是破碎或搅松孔底风化层或胶结砾石层的作用。双锥双螺短螺旋打桩钻头是双锥片布齿,布齿数量是单锥单螺短螺旋打桩钻头的1.5~2倍,一般适合钻进风化岩层和卵砾石较小的砾石层。钻进中是双钻齿同时刻划,钻进效率高,钻进较平稳。 Application of pile drills in different geology: in recent years, large-diameter rotary drilling method has been widely promoted in pile foundation construction. In the construction of large diameter rotary drilling, hard formation drilling is one of the main problems encountered in construction. Usually, the hard strata in the construction of rotary excavation are mainly the river bed (the old road), the gravel of the hills and the gravel, the rock and the weathered rock, and the short spiral pile drills are mainly used in these hard strata. The selection and use of short screw piling bits is an important part of the construction efficiency. In the drilling process of short spiral piling bit, the central tooth at the bottom of the core tube is "cut out" at the center of the bottom of the core tube, forming a broken free surface. The cutting tool on the spiral cone is followed up to form a cone. The projection of the track formed by drilling in the bottom of the hole is a group of concentric circles. Cuttings, soil and stones rise backward along the helical blades and are filled with helical blades. After being lifted out of the holes, or after they fall into the holes, they are removed by using the sand drill bucket. The single cone single screw short spiral piling bit has relatively few teeth, and generally drilling into the looser cemented gravel layer, especially the larger strata and weathered strata of the gravel. As the blade spacing of the single cone single screw bit is larger, the cuttings, soil blocks and gravel in the drilling process are easily dropped in the hole, the sand bucket should be used to dredge the bottom, which is usually a drill screw drill bit and one drill sand drill pipe, alternately. Many times, the spiral piling bit plays the role of crushing or loosening the bottom weathering layer or cemented gravel layer. The double cone double spiral short spiral piling bit is a double cone tooth, and the number of the teeth is 1.5 to 2 times more than the single cone single screw short screw drill. It is generally suitable for drilling the weathered rock and the gravel gravel layer with small gravel. In drilling, double drilling teeth are carved at the same time, drilling efficiency is high, and drilling is more stable.

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联系人:朱文杰  咨询热线:133 3388 9451  固定电话 :0379-64961800
客服信箱:13333889451@qq.com  地址:河南 洛阳 孟津工业园区 隆华大道  网址:www.chongjizuantou.com.cn
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