GROUT MONITOR FOR PROPORTIONAL INJECTION, AND PROPORTIONAL INJECTION METHOD FOR CURED GROUT USING THE SAME

• Main Authors: TOSHIDA YASUHARU, SHIMODA KAZUO, MASAKI TAKUYA, FURUYA SATORU
• Format: Patent
• Language: English; Japanese
• Published: 24.06.2021
• Subjects: ADHESIVES; CHEMISTRY; DYES; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

To provide a grout monitor for proportional injection having a mixing backflow preventing/mixing mechanism for backflow prevention of liquid A to liquid B side of an inner pipe and mixing the liquid A and the liquid B, and a proportional injection method of a cured grout using the same.SOLUTION: A grout monitor 10 for proportional injection for proportionally injecting a cured grout obtained by mixing liquid B of water glass having concentration of 18-35% in a volume of SiO2 having a molar ratio of 2.5-4.0 to liquid A of cement milk containing 500-1,200 kg of cement per 1 m3, with a ratio of 130-500 L per 1 m3 of the liquid A using a double pipe rod 1 includes a mixing backflow preventing/mixing mechanism 5 for preventing the liquid B discharged from an inner pipe 3 of the double pipe rod 1 from flowing backward to the inner pipe 3, and mixing the liquid A and the liquid B. The mixing backflow preventing/mixing mechanism 5 has: tip opening blocking means for blocking the tip opening of the double pipe rod 1; a plurality of discharge holes 4 formed on a side face in the vicinity of the tip of the inner pipe 3 of the double pipe rod 1; and a cylindrical body 50 composed of a stretchable material tightly covering the outer surface of the discharge hole 4.SELECTED DRAWING: Figure 1 【課題】Ａ液が内管のＢ液側への逆流防止とＡ液とＢ液の混合を行う混合逆流防止混合機構を備えた比例注入用グラウトモニタ及びそれを用いた硬化グラウトの比例注入方法を提供する。【解決手段】１ｍ3あたりセメント５００〜１，２００ｋｇを含んだセメントミルクのＡ液に、モル比２．５〜４．０のＳｉＯ2の容量で１８〜３５％の濃度の水ガラスのＢ液を、Ａ液１ｍ3に対して１３０〜５００Ｌの比率で混合した硬化グラウトを二重管ロッド１を用いて比例注入するための比例注入用グラウトモニタ１０において、二重管ロッド１の内管３から吐出したＢ液が内管３に逆流することを防止するとともに、前記Ａ液と前記Ｂ液とを混合する逆流防止混合機構５を備え、逆流防止混合機構５を、二重管ロッド１の先端開口を閉塞する先端開口閉塞手段と、二重管ロッド１の内管３の先端付近の側面に形成された複数の吐出孔４と、この吐出孔４の外面を密着被覆する伸縮材からなる円筒状の円筒体５０を設ける。【選択図】図１