1)  bored and bottom-enlarging
					 
	
					
				
				 
	
					
				钻孔扩底
				1.
					This paper introduces boring method of bored and bottom-enlarging mudjack pile in dry operation.
						
						本文简单介绍了干作业钻孔扩底桩的成孔处理方法。
					
					2)  boring and expanding bottom pile
					 
	
					
				
				 
	
					
				钻孔扩底桩
				1.
					Analysis on construction method of boring and expanding bottom pile in permafrost region in Qinghai-Tibet plateau;
						
						青藏高原多年冻土区钻孔扩底桩施工方法浅析
					2.
					Construction technology of boring and expanding bottom pile in Qinghai-Tibet Plateau;
					 
					
						
						 
					
						青藏高原上钻孔扩底桩的施工技术
					
					3)  counterbore drill
					 
	
					
				
				 
	
					
				平底扩孔钻
			
					4)  drilling bottom-enlarged grouting pile
					 
	
					
				
				 
	
					
				钻孔扩底灌注桩
				1.
					Based on the engineering example,discussion is given to the foundation selection of high-rise building in terms of technical and economical feasibilites,and introduction is made to the application characteristic of pump-absorption anti-cycle drilling bottom-enlarged grouting piles and its key construction techniques.
						
						结合工程实例,从技术可行性和经济可行性两方面探讨高层建筑桩基础的选择,介绍泵吸反循环钻孔扩底灌注桩的应用特点及钻孔扩底灌注桩施工过程中的关键技术,并展望了钻孔扩底灌注桩的应用前景。
					2.
					According to the engineering practice,introducing the technical points of drilling bottom-enlarged grouting pile,pointing out the technical measurements of prevention and treatment in the construction.
						
						结合工程实例 ,阐述了钻孔扩底灌注桩的施工技术控制要点 ,并针对施工中常见的问题 ,提出了预防及处理的技术措
					
					5)  bell-out bored pile
					 
	
					
				
				 
	
					
				扩底钻孔灌注桩
				1.
					The paper presents an introduction to the function of the bell-out bored piles and machinery andequipment used for building these piles.
						
						介绍了扩底钻孔灌注桩性能和施工机具,结合工程实例阐述了扩底钻孔灌注桩的施工工艺和施工注意事项,最后提出了对扩底钻孔灌注桩的认识。
					
					6)  under-reamed bored pile
					 
	
					
				
				 
	
					
				钻孔扩底灌注桩
				1.
					Compared to artificial digging-hole pile, the pumping reverse-circulation under-reamed bored pile has higher adaptability to geological condition, and its construction is safety and reliability.
						
						泵吸反循环钻孔扩底灌注桩与人工挖孔灌注桩相比,地质条件的适应性强,施工安全可靠。
					2.
					In the paper, according to its success application in a tall building, the design and construction of under-reamed bored pile is debated in details.
						
						本文结合钻孔扩底灌注桩在某工程中的应用情况,对钻孔扩底灌注桩设计、施工等应用方面进行了比较详细的介绍,指出该工法具有较好的经济效益。
					3.
					According to successful application of bored pile in a tall building, construction principle of under-reamed bored pile is discussed in details.
						
						结合钻孔扩底灌注桩在某高层建筑物基础中的成功应用,对钻孔扩底灌注桩的成桩原理进行了有关的阐述,认为扩底钻头的扩张角α≤25°为宜,且扩底高度范围内岩石层的饱和单轴抗压强度标准值一般不大于6MPa;同时在单桩竖向承载力的设计计算时,要求对桩身侧阻力与桩底端阻力进行相应修正。
					补充资料:钻孔(扩孔与铰孔)
		各种零件的孔加工,除去一部分由车、镗、铣等机床完成外,很大一部分是由钳工利用钻床和钻孔工具(钻头、扩孔钻、铰刀等)完成的。钳工加工孔的方法一般指钻孔、扩孔和铰孔。 
用钻头在实体材料上加工孔叫钻孔。在钻床上钻孔时,一般情况下,钻头应同时完成两个运动;主运动,即钻头绕轴线的旋转运动(切削运动);辅助运动,即钻头沿着轴线方向对着工件的直线运动(进给运动),钻孔时,主要由于钻头结构上存在的缺点,影响加工质量,加工精度一般在IT10级以下,表面粗糙度为Ra12.5μm左右、属粗加工。 
一、钻床 
常用的钻床有台式钻床、立式钻床和摇臂钻床三种,手电钻也是常用的钻孔工具。 
1.台式钻床 
简称台钻,是一种在工作台上作用的小型钻床,其钻孔直径一般在13mm以下。 
台钻型号示例:Z  4  0  1  2 
                         
                                 主 参 数:最大钻孔直径 
                     
		
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
	参考词条