| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a chemical injection method in which the gel time of a grouting material can be controlled without depending on the additive amount of poly aluminium chloride or the left time of the poly aluminium chloride as kneaded. <P>SOLUTION: In a chemical injection method, a grouting material obtained by mixing water glass and acid as a neutralizer and then adding poly aluminium chloride is injected into the ground, in which the gel time of the grouting material is controlled on the basis of the molar ratio ([SiO<SB POS="POST">2</SB>]/[Na<SB POS="POST">2</SB>O]) of the water glass. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
