DL/T 5200-2004水電水利工程高壓噴射灌漿技術(shù)規(guī)范

內(nèi)容概要

Besides being used for soil foundation consolidation inhydropower and water resources projects, jet grouting is much morepopularly applied to prevent seepage for these projects. Comparedwith the traditional methods of foundation strengthening, constructionof jet grouted cutoff wall possesses different features andrequirements. For several years, with the great effort of engineers,many jet grouted cutoff walls have been constructed and a plenty ofexperience has been gained in construction of hydraulic structures invarious scales and under complicated geological conditions. In orderto ensure the quality of jet grouting works, this Standard isformulated in line with the characteristics of hydraulic structures.

書籍目錄

Foreword1 Scope2 Normative References3 Terms and Definitions4 General Provisions5 Structural Patterns of Jet Grouted Cutoff Wall6 Grout7 Equipment8 Drilling9 Grouting10 Quality Inspection and AcceptanceAppendix A (Informative Appendix) Construction Record SheetsAppendix B (Normative Appendix) Calculation of PermeabilityCoefficient of Enclosed Well

章節(jié)摘錄

7　Equipment7.0.1　The drilling equipment for jet grouting hole shall be capable of drilling in the construction strata separately or together with the jetpipes.7.0.2　Jet pipe, jet nozzle and grout deliver （also called highpressure tap） shall be with reliable sealing. They shall be easilyassembled and disassembled. Jet pipe shall be rigid and connectedsmoothly and straightly. Jet nozzle shall be precisely directed.7.0.3　Jet nozzle shall be made of wear resistant material, and itsoutlet diameter shall match the design pressure and flow. Structuraldimension and machining precision of jet nozzle shall satisfy therequirement of high-velocity jet.7.0.4　The performance of agitator shall be compatible with typeand volume of grout and be capable of ensuring the uniformity ofgrout mixing. Suitable high speed agitator should be selected.7.0.5　The volume of grout tank shall meet the requirement ofcontinuous grout supply during jet grouting.7.0.6　The performance of pumps for jet grouting （including highpressure pump） shall match the type and density of selected grout.Pressure and flow for grout pump and high pressure water pump shallmeet the construction requirement, and the nominal pressure shall benot lower than 1.2 times the design pressure.

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