| 摘要 |
PURPOSE: A compaction grouting system for constructing a cut-off wall is provided to improve the durability and strength of the cut-off wall, and to prevent environmental pollution by regulating the mixture ratio of liquid, injection of compressed air and injection rate and by injecting the liquid selectively. CONSTITUTION: A mixture tank(10) storing A-type liquid(11) mixing silicic acid and water and a mixture tank(20) storing B-type liquid(21) for mixing cement and water are separably installed, and connected to a grouting rod(37) through a chemical feeding pipe. The grouting rod injects mixed liquid through an injection hole(38) into the ground along a grouting hole(2). The chemical feeding pipe is divided into a main injection pipe(31) feeding the B-type liquid by a cement pump(26) and an auxiliary injection pipe(32) feeding the A-type liquid by a silicic acid pump(16). A discharge end of the auxiliary injection pipe is communicated with the main injection pipe, and each injection pipe is connected to the grouting rod with forming the single mixture injection pipe. An air injection pipe(33) is communicated with the auxiliary injection pipe, and installed in the end of the auxiliary injection pipe to inject compressed air from an air compressor(34).
|
