Abstract:Computer graphic processing technology (including screen display, character processing, printout ect.), and the method applied in design and calculation of ground and foundation engineering, and intergration technology are discussed in this article.

Abstract:The fundamentals, features, applicable range of micro tunneling techniques and its development both in China and abroad are introduced. The proposal for speeding up the spread of this technology is presented.

Abstract:Underwater blastholes had been drilled under the Songhua River during the freezing season in the Northeast. The drilling equipment and operation platform are described. Depending on different formations, the static pressure vibration method was used to sink casings for hole wall protection and the DTH drilling method was employed. The air circuit system was designed with the casing connection method improved. The scientific management method was carried out. These resulted in fairly good effects.

Abstract:结合工程实践，论述了利用劈裂注浆形成的脉状浆液固结体与未拔出的注浆管一起加固桥台地基的机理、设计、施工及评价，这一方法为桥台地基的加固提供了一种有效的措施。

Abstract:The Intelligent Drilling Computer Moniter System is an advanced scientific research result, which combines the computer techniques with drilling technology, and involves monitoring techniques, identification algorithm etc. The system can be equiped on the field rig quickly and conveniently. It can produce the constrat conditions for drilling parameters automatically, and identify the down hole conditions intelligently so that it can enhance the drilling efficiency and minimize hole problems. It can also trace the track of drilling hole, and predict whether hitting the designed target, and establish the field drilling data base.

Abstract:The types and operating principle of the hydraulic clamp are briefly described, and the structural and parametric designs of the single jaw, normally closed compound hydraulic clamp are detailed.

Abstract:The description is made of the GW 40 large diameter all hydraulic crawler type drill in terms of its development, technical parameters, main advanced technology, version verification, production trial, etc.

Abstract:The paper discusses basic ways of slabstone edge shearing at present and analyses the basic mechanics in the edge shearing action, and the design of the shearing machine.

Abstract:The diamond bit design expert system and the computer controlled system for the bit production are described with their uses in production.

Abstract:Pure alloy layer thickness of layered segment is studied theoretically and the calculation formula of the layers of saw segment cutting granite is obtained after the wear and tear mechanism of general diamond impregnated segment is analyzed.

Abstract:Drilling and completion technology for ZK101 well in Niujie geothermal field in Eryuan County, Dali Prefecture, Yunnan Province is expressed in this paper, and it has discussed high temperature drilling fluid and cementation technology.

Abstract:Just as in oil and natural gas reservoirs, drilling operation in coalbed gas reservoir can also easily cause formation damage. This paper analyses the characteristics of the damage mechanism of coalbed gas reservoir,and gives out some techniques to control the damage and protect the reservoir.

Abstract:The formula of calculating effective suction length of exhaust system in one ended tunnel is derived from the theory of plane flow. The factors influncing the effective suction length are also discussed in this paper, according to the experimental observations and test.

Abstract:The paper describes the demolition blasting of a thin shell reinforced concrete water tower under complicated environment condition. The demolition blasting scheme and blasting design of the water tower are introduced. The differences between water tower and chimney when they are falling are analyzed and the counter measures are pointed out.