迈式（自进式）锚杆施工简介.rar

迈式（自进式）锚杆施工简介

迈式注浆钻进锚杆是一种将钻进，注浆，锚固功能合而为一的锚杆，能够保证在复杂地层（软岩，土层，断裂带等）条件下的锚固效果，具有可靠，高效，简便的特点。
(1)钻杆及锚杆合而为一，在风化岩，碎岩层，回填区，砂，粘土，园卵石层等不需套管护壁，即能形成锚孔，保证锚固与注浆效果。操作简便，快捷省时，节省25%工作量，减少工程成本。
(2)高效能的注浆，充填裂隙，固结岩体和土层，控制地下水，具有良好的注浆扩散半径及可靠的锚固质量。
(3)连续的螺纹使迈式注浆钻进锚杆可任意切割，连接，适合在狭窄的工作场地施工。同时，连续的螺纹使迈式注浆钻进锚杆比光滑的钢管具有更强的粘结阻力。据试验结果所得，粘结阻力高出光滑钢管2—3倍。本文仅就用潜孔钻机施工迈工锚杆作简介，当采用手持气腿式风钻的施工方法与使用潜孔钻大体相同，两者区别在于手持气腿式风钻适用于4m以内的迈式锚杆。
1. 施工方法
1.1 施工准备: 用人工或机械将要施工的场地平整好，以便潜孔钻能行驶、进出及操作。一般要修一条潜孔钻机行驶便道，便道要求宽3m左右，坡度控制在30%，而施工场地需4m×5m。根据需要搭设工作平台或搭设脚手架，以便操作。将各种风管和水管接好，保持各种管路畅通，空压机司机和注浆手及潜孔钻司机到位，空压机、潜孔钻机、注浆泵、灰浆搅拌机试机无故障，备好各种料具。
1.2 钻孔: 空压机启动后，开启潜孔钻机，根据地形及地质情况，调整好潜孔钻机的钻进角度。在潜孔钻在套上专用的纤尾套，将锚杆与纤尾套连接牢固，并在第一节锚杆的前端套上钻头。并根据地质情况确定锚杆的长度，以
Mai (self-propelled) Anchor Construction Introduction

Step drilling grouting bolt is a way to drilling, grouting, anchoring function into one of the bolt, to ensure complex formation (soft rock, soil, faults, etc.) under the conditions of anchoring effects reliable, efficient, convenient features.
(1) drill and bolt into one, in the weathered rock, crushed rock, backfill areas, sand, clay, gravel layer without casing Garden Wall, which can form anchor holes, to ensure anchoring and grouting. Simple, fast and save time, save 25% of the workload and reduce the cost of the project.
(2) high performance grouting, filling cracks, rock and soil consolidation and control of groundwater, grouting with a good spread radius and reliable bonding.
(3) continuous thread to step drilling grouting bolt can be cut, connect, work in a narrow space for construction. Meanwhile, the continuous thread to step drilling grouting bolt than the smooth tube has a stronger bond resistance. According to test results obtained, bond resistance 2-3 times higher than the smooth tube. This article will step forward with the construction hole drill bolt work for us, when using hand-held air-leg construction method of pneumatic drill hole drill with the use of essentially the same, difference is between the two hand-held pneumatic drills suitable for air-leg within the step-type anchor 4m bar.
1. Construction method
1.1 Construction preparation: artificial or mechanical construction of the site preparation will be good to hole drilling can travel, access and operation. General to repair a hole drill moving sidewalk, pavement asked about 3m wide, slope control 30% of the construction site be 4m × 5m. Needed work platform or scaffold erection erection in order to operate. To a variety of wind and water pipes connected, maintaining a variety of pipe flow, air compressor drivers and grouting hole drilling hand and place the driver, air compressor, drilling machine, injection pump, mortar mixer machines free trial failure, prepare a variety of materials.
1.2 Drilling: air compressor, the open hole drill, according to the terrain and geological conditions, adjust the angle hole drilling rigs. In the drill hole put on a dedicated fiber end cap and bolt sleeve is firmly connected with the fiber end, and bolt in the front section I put on the bit. Anchor according to geological conditions to determine the length, in order to