Abstract:According to the climate characteristics of Hulun Lake in Inner Mongolia, system of icy lake drilling platform was designed for assuring the work safety and implementing of scientific icy lake drilling in winter. Considering the strata characteristics of Hulun Lake, new piston sampling drilling tool and press-fitting sampling drilling tool were developed. The practice proved that the result of sampling is satisfying with the coring rate of 100%.

Abstract:Seism monitoring under ground has higher accuracy with less noise jamming from the ground surface. The paper introduced the design of seism monitoring well in Hebei plain and key technology of well completion, pipe laying and well cementing. Proper well completion technology, pipe laying with bottom sealing and well cementing outside the pipe were used for the special demand of monitoring well.

Abstract:The paper introduced the advantages of ground source heat pump and application of it in Tianjin, analyzed the applicability and made the analysis comparison on its economy. The paper also introduced the characteristics of shallow geothermal survey in Tianjin and some relative problems in borehole engineering, described hydrogeology condition in Tianjin, and analyzed how to deal with recirculation for ground source heat pump and damage to resistivity water layer between saline and fresh water layer.

Abstract:By the theoretical analysis, numerical simulation and experiment study, a serial parameters affected reverse circulation of pneumatic hollow down-the-hole drilling were optimized, and the relative parameters and regression equations were achieved, and software of parameters optimization on drilling bit was made with Visual Basic language. According to the research conclusion, construction test was made with more than 98% coring rate. The parameter optimization system provides the reference gist for the hard rock drilling technology.

Abstract:The paper introduced the characteristics and application effect of the new wire-line coring drill pipe and the spindle coring drill with mechanical transmission continuous drillpipe feeding, analyzed the technical measures to improve the efficiency of coring drilling construction, reduce cost, save energy and reduce consumption. The paper presented the development direction and put forward the suggestion on the geological coring drill.

Abstract:The paper analyzed the necessity to research and develop the drilling rig with mechanical top drive and long stroke feeding by hydraulic control, presented the problems of the drilling rig with new type mechanical top drive, introduced XL-5 drilling rig in structure form, parameter, characteristic and the development test.

Abstract:Based on the biggest mobile communication network at present in China, used the communication technique of CAN bus, the GPS remote monitoring system was combined with electronic control system of the rotary drilling rig to remote monitor the vehicles. It is significant to the acquisition and security of real-time traffic data. The paper introduced the application of hardware equipment, program design and data transfer flow to the rotary drilling rig with the GPS remote monitoring system and the application effect on the NR series of rotary drilling rigs with the system.

Abstract:In the need of deep ore exploration, with current development of drilling equipment, and with smelting and mechanical processing ability, a new wire-line coring drill pipe and its drilling system were developed. The application result met the design requirement.

Abstract:Because of complicated geological conditions and neighboring environment in the site of foundation pit of Hubei Provincial Armed Police Corps Regimental Commander Building, combined supporting method was adopted with pile anchor retaining, dry jet mixed pile and anchor wire mesh in shotcrete, so safety was ensured for construction of deep foundation pit, surrounding buildings and underground utilities. Economic and social benefits were achieved with lower cost and shorter construction period.

Abstract:Excavation engineering mainly includes design and construction of excavation support system and soil excavation etc. It is comprehensive system engineering. Because of different geological conditions in different areas, excavation engineering has very strong regional and individual characters. Investment is largely reduced and stability of side slope is protected by using PHC pile instead of using steel-pipe pile in the project introduced in this paper.

Abstract:SMW method is a new construction technology, which was introduced from Japan with simple structure, good waterproof, short construction period, low cost and less pollution. The article introduced the characteristics of the SMW method, applying condition, main points of quality control and existing problems.

Abstract:By the analysis on treatment for the foundation with defect, introduction was made on the consolidating mechanism of lime pile and the treatment method for small-type foundation with defect.

Abstract:Analysis was emphasized on the development trend of pipeline laying rig by horizontal directional drilling and construction market in China in recent years. The paper summed up the horizontal directional drilling technology and the market development in China with the reference of the analysis on the market development of horizontal directional drilling technology abroad.

Abstract:Based on a number of key issues on construction technology, such as concrete pipe selected, the design and construction of work well, application of pushing pipe construction in manual digging style was introduced with a case of G drainage pipeline project of the comprehensive renovation works for water environment in Chengdu City.

Abstract:TBM boring machine is widely applied in tunneling excavation with its high speed, high efficiency, high safety and good quality, it is especially suitable for deep-lying long tunnel, but drives slowly in unfavorable geological tunneling section. In this case, special technical methods should be taken according to the surrounding rock characters, verification should be done to verify supporting method and design parameters. Summery was made in geological forecast method, treatment measures and deformation monitoring method in unfavorable geological tunneling condition with field case.

Abstract:Jinping auxiliary twin tunnel consists with two lines, one (Line A) is parallel to the other (Line B) with a separation of 35m from center to center, and the length of single line is 175 km. Due to the complex geological environment, there is no suitable condition to build any shaft (vertical or oblique shafts) in between, and the tunnel has to be constructed with bi-directional drilling (eastern and western side). At the meanwhile, as construction field of the western side is insufficient to the requirement for rail transportation, jet ventilation technology applied in highway tunnel operation was introduced for trackless transportation to solve ventilation problem, and air quality indexes was up to the national sanitation standard.

Abstract:The slanting lane for cleaning up the main shaft of Huozhou coal electricity group Limited company was planed to pass through the water-bearing stratum of K2 calcareous rock, where the hydrogeological conditions is complicated and its water-bearing stratum belt pressure reaches 5 MPa. To avoid water bursting, this paper introduces the technology of grouting in high-pressure water-bearing stratum, which provides feasible experience for tunneling security.

Abstract:Supervision mechanism is gradually introduced into coal geological exploration. The paper discussed the main points of supervision to coal geological exploration project based on the briefly introduction of supervision organization and supervision duty.