Jet Grouting Construction File - Geocitiesws：旋喷注浆施工文件geocitiesws.docVIP

CONSTRUCTION FILE: JET GROUTING WORKS FEBRUARY 2001 SAMSUNG - ARAB CONTRACTORS J/V  TABLE OF CONTENTS PART 1 JOB DESCRIPTION PART 2 TIME SCHEDULE PART 3 METHOD STATEMENT PART 4 COMPANY PART 5 HUMAN RESOURCES PART 6 EQUIPMENT PART 7 DESIGN REVIEW PART 8 QUALITY CONTROL PART 9 CONSTRUCTION DRAWINGS PART 1 JOB DESCRIPTION JOB DESCRIPTION OF JET GROUTING These Jet Grouting works are intended to improve the characteristics of the soft soils underlying the top layer of fine to medium sand. Especially, on this project, the jet grouting improvement shall ensure following function; as foundation for the crane beams of the new quays to construct. as improvement in the transition areas between new and existing cells, where the fill preloading has not been performed. as reinforcement against ship impact by means of steel pipes sealed into the seaside columns After the review of the above requirement on the matters of Design Field condition, the jet grouting shall be followed by the specification. PARTICIPANTS IN CHARGE PART 2 TIME SCHEDULE   PART 3 METHOD STATEMENT  3.1 General Jet Grouting is one of the deep-mixing methods for ground improvement. The ground is fined down by high-pressure(200-700kg/?)pump. Simultaneously, Cement Milk is injected and mixed in the soil. The diameter of nozzle is 2.3 ~ 3.0 mm and jetting velocity is expected to about 30 m/sec. It has been very widely used in improvement of soft soil and the method hereof never deviates from the general scheme of Jet Grouting. However, as the demanded strength of completion is higher than usual case, accurate quality control is highly expected. Characteristics of Jet Grouting It is very independent of soil condition and layer. It is possible to get proper reinforced strength as designed. (Strength may be augmented by increasing impregnation quantity) It is feasible to perform to any direction. It is uniform in quality. It is pretty sound for Environment. It is effective in