self-adjustable drill chuck

Considering the strata characteristics of Hulun Lake,new piston sampling drilling tool and press-fitting sampling drilling tool were developed.

考虑到呼伦湖沉积地层特点,研制了新型活塞式取样钻具和压卡式取样钻具,实践证明,取样效果良好,取心率达到了100%。

According to the environment and the concrete geological conditions,the comprehensive reinforcement method of prestressed anchor cable,self-drilling anchor bolt,steel-net and shotcrete is adopted for the slope using the engineering analogism and experiential method.

依据周边环境和地质条件,采用工程类比法和经验法对边坡采用预应力锚索、自钻式锚杆、钢筋网和喷射混凝土联合加固的措施;合理的设计参数、正确的支护结构形式和科学的施工步骤,使该加固措施充分发挥了锚固作用;根据锚杆钻孔施工过程中遇到的裂缝位置及边坡极限平衡理论,采用反算法得出岩体力学参数,进而对加固后边坡的安全系数进行计算。

According to the landslide body characteristics,the processes of self-drilling anchor bolt,consolidation grouting and so on were adopted.

主要介绍金堆城东川河改道工程隧洞施工过程中出现的一次较大塌方治理,塌方体松散并含孤石,传统方法无法处理,根据塌方体的特点,有针对性地采取自钻式锚杆、固结灌浆等施工工艺,并获得成功;对隧洞衬砌、地表陷坑进行了处理,确保了工程安全、质量。

The supporting system of self-drilling soil-nail with sealing wall made by SMW construction machine,is discussed through foundation pit of Xuanwu Lake tunnel project.

南京玄武湖隧道工程垂直支护段采用自钻式土钉与SMW机械施工止水帷幕相结合复合土钉支护技术,本文介绍了该技术的设计、施工方法,并结合现场试验分析了其受力及变形机理。

The supporting system of self-drilling soil-nail with sealing wall made by SMW construction machine are discussed through foundation pit of a tunnel project.

南京某隧道工程垂直支护段采用自钻式土钉与SMW机械施工止水帷幕相结合复合土钉支护技术,介绍了该技术的设计、施工方法,并结合现场试验分析了其受力及变形机理。

An introduction of 4 000 m truck mounted rig,truck mounted electrical powered rig,47 m mast rig,truck mounted rig/skid mounted rig,huge rig and super single stand rig are introduced,their outstanding performance and new technology,new structure are introduced as well.

介绍了国内外4000 m车装钻机、车装电驱动钻机、47 m桅形井架钻机、车装/撬钻机、巨无霸钻机和超级单根钻机等自走式钻机的优良性能和新技术、新结构及实际应用;阐述了自走式钻机的新设计理念,并指出为特定地形和环境开发的自走式沙漠钻机、低温钻机等代表了自走式钻机新的发展趋势。