DISCHARGED SLURRY AMOUNT MANAGEMENT SYSTEM FOR PENETRATION AUXILIARY WATER CONSTRUCTION, AND SOIL REMOVAL TYPE DEEP LAYER MIXING METHOD

To perform improved soil mixing processing in which a slurry amount discharged into a ground in a pull-out construction with respect to a penetration auxiliary water amount is managed with high accuracy and to reasonably develop strength at the time of blend planning in a ground improvement.SOLUTION: A discharged slurry amount management system for a penetration auxiliary water construction comprises: a quality management unit 20A in which a planned slurry water-cement ratio, a planned slurry amount, a planned penetration auxiliary water amount, a planned penetration speed, and a planned correction water cement ratio (a sum of a planned compound water and a planned penetration auxiliary water) that are obtained in planning a construction are inputted; a construction measurement unit 20B for measuring a real construction depth, a real penetration speed, and a real penetration auxiliary water amount in constructing; a construction management unit 20C for obtaining a real correction water-cement ratio based on the real construction depth, the real penetration speed, and the real penetration auxiliary water amount measured by the construction measurement unit 20B; and a calculation unit 20D for comparing the planned correction water-cement ratio with the real correction water-cement ratio and calculating a real slurry amount and pull-out speed in a pull-out construction of a rotation rod.SELECTED DRAWING: Figure 2 【課題】貫入補助水量に対して引抜き施工時の地盤に吐出するスラリー量を精度よく管理した改良土混合処理を行うことができ、地盤改良における配合計画時の強度を合理的に発現することができる。【解決手段】施工計画時に得られる計画スラリー水セメント比、計画スラリー量、計画貫入補助水量、計画貫入速度、及び計画配合水と計画貫入補助水とを合わせた計画修正水セメント比が入力される品質管理部２０Ａと、施工時において、実施工深度、実貫入速度、及び実貫入補助水量を測定する施工計測部２０Ｂと、施工計測部２０Ｂで測定された実施工深度、実貫入速度、及び実貫入補助水量に基づいて実修正水セメント比を得る施工管理部２０Ｃと、計画修正水セメント比と実修正水セメント比とを比較して、回転ロッドの引抜き施工時における実スラリー量、及び引抜き速度を算定する算定部２０Ｄと、を備えている。【選択図】図２