SP-30B horizontal rotary spray rig Horizontal Jet Grouting in horizontal drilling in a high pressure water jet grouting way to mud, the outer contour of the excavation of the tunnel lining arching pre-order protection ahead of the tunnel face and surface subsidence Support Construction Methods. Practice has proved that the level of jet grouting pile is effective and fast at home and abroad ahead of the economic tunnel support technology, has broad prospects for application. Company on the basis of a large number of studies on the use of theoretical analysis of jet grouting pile driver has been further improved, and the use of a number of technical innovations, according to the needs of the construction, production and utility models of small horizontal jet grouting pile.