拝見させていただきました。少しご質問です。ドレン材が分解されるとそこは空洞になり、地盤が不安定になるのではないでしょうか？

hi all i have invented a built in anchor system in the mandrel , so you dont have to waste about 50 Cent in each point . if you are interested please dont hesitate to contact me

素晴らしい製品です。

Where do you apply your stone columns? Do you think the constructability is practicable for road construction in swampy, highly silt-clay characteristics with high natural moisture content? Please get in touch with us: freiherrhelli@gmail.com. Thank you very much for your prompt answer.