Study On Construction Equipments For High-Pressure Jet Grouting Technique

With the course of the reform and opening to the outside in our country, the construction of water conservancy is developing rapidly. As an important technique for consolidation and removing hidden dangers, the jet grouting technique is applied widely day by day. And as the foundational condition to implement this technique, a systemic research has been made for the construction equipments.In the paper, on the basis of the present research situation of high pressure jet grouting technique and the level of mechanical manufacture in our country, the author makes a systematic induction from the equipments for high pressure jet grouting at home and abroad, completes sets of equipments for high pressure jet grouting in serial form, and evaluates the usage of modern boring implements and high pressure mud pump.In the jet grouting technique for anti-seepage and foundation consolidation, it is to use water with centralized energy to stir the stratum by jet flow, and mix the grain from the stratum with solidified agency to form a condensation body. It is divided into single-medium jetting, double-medium jetting, triple-medium jetting and multi-medium jetting. The complete sets of construction equipments of triple-medium jetting are fabricated jointly by multi-machines. They are largely identical but with minor differences comparing the equipments of single-medium jetting and double-medium jetting with those of triple-medium jetting. The equipments of multi-medium jetting have not been applied in our country.In the paper, the relevant sets of equipments are completed for high pressure jet grouting, in which the high pressure mud pump is used in the slurry system, to make full use of the characteristics of modern high pressure mud pump and improve the quality of high pressure jet grouting. In view of the existing artificial records of construction parameters of high pressure grouting, the special equipment and automatic monitoring devices are designed for high pressure jet grouting. Combining with the concrete projects, the author analyzes the problems...