METHOD FOR PREVENTING SOIL STRUCTURE FROM SLIDING AT SLOPE SURFACE LAYER WITH GEOCELL FIXING OPERATION AUXILIARY MEANS

• Main Authors: SARUWATARI TAKASHI, OKAMOTO MASAHIRO, YAZAKI SUMIO, HARADA MICHIYUKI, YAMADA TAKAHIRO, KIYOKAWA NOBUO, OUCHI KIMIYASU, KOJIMA KENICHI, YOKOTA KOICHI, OTA AKIHIKO, MATSUMARU TAKAKI
• Format: Patent
• Language: English; Japanese
• Published: 22.10.2015
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To provide a method for preventing soil structure from sliding at slope surface layer with a geocell fixing operation auxiliary means with a combination of natural ground reinforcement means and a slope surface protector which provides an excellent workability for embankment or destructionable natural ground or narrow ground; meets environmental requirements, such as vibration or noise upon operation; provides uniform quality and effect; and provides an excellent appearance, durability and economical advantage.SOLUTION: There is provided a method for preventing soil structure from sliding at slope surface layer with fixing operation auxiliary means for geocell 6. After accomplishment of boring of a hole having a designed depth, with a water stopper (sealing tip end of the hole by inserting an iron ball and the likes), cement paste 3A from tip end of a drill bit 1 is ejected from a side hole arranged on side surface of a drill rod or the drill bit 1. By virtue of elevating/lowering movement of the drill rod and rotational movement of the drill rod as a hollow steel shaft within a designed region to be improved, mixing improvement with natural ground part within the region to be improved is executed so as to form a designed improved diameter. 【課題】 盛土や崩壊性地山や狭隘地での施工性などに優れ、かつ、施工時の振動・騒音などの環境対策を満足し、均一な品質性能、景観や耐久性および経済性に優れる性能の高い地山補強体とのり面保護工との組合せによるジオセル固定用施工補助体による土構造物ののり面表層すべり対策工法を提供する。【解決手段】 ジオセル６固定用施工補助体による土構造物ののり面表層すべり対策工法において、目的とする削孔長まで削孔完了後、止水ストッパー（鉄球等の挿入により先端孔を閉塞する）により、先端削孔ビット１先端からのセメントペーストの吐出を、削孔用ロッドまたは削孔ビット１の側面に設置した横孔からセメントペースト３Ａを吐出させ、目的とする改良範囲を中空棒鋼を兼ねた削孔用ロッドの引き上げ・引き下げ運動と削孔用ロッドの回転運動により、改良範囲の地山部とミキシング改良を行い、目的とする改良径となるように造成する。【選択図】 図２