MECHANISM OF UPHEAVAL CONTROL AND CONSIDERATION FOR IMPROVEMENT OF CONSTRUCTION EFFICIENCY OF A NEW CPG METHOD
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- TAKENOUCHI Kanji
- 三信建設工業（株）技術本部
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- SASSA Shinji
- （国研）海上・港湾・航空技術研究所 港湾空港技術研究所
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- YAMAZAKI Hiroyuki
- （国研）海上・港湾・航空技術研究所 港湾空港技術研究所
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- ADACHI Masaki
- みらい建設工業（株）技術本部
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- TAKADA Keita
- 復建調査設計（株）東京支社
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- OKADA Hiroshi
- 東興ジオテック（株）技術本部
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- KANEKO Chikai
- （株）アートンシビルテクノ
Bibliographic Information
- Other Title
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- 新たなCPG工法の隆起抑制メカニズムと施工能率向上の検討
- アラタ ナ CPG コウホウ ノ リュウキ ヨクセイ メカニズム ト セコウ ノウリツ コウジョウ ノ ケントウ
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Abstract
The CPG method is a method of increasing the soil density by injecting mortar, and it is applied as a liquefaction countermeasure under the existing structure of the ports and airports. However, ground upheaval often becomes a problem. The “up and down method (U/D method),” a new CPG method, was developed in our previous small-scale model tests and field tests. This new method greatly improved upheaval control and the efficacy of liquefaction mitigation compared with the conventional CPG method. The purpose of this research was (1) to increase construction efficiency (2) verify upheaval control mechanism. Consequently, it was found that the workability can be improved by using an injection pipe with a tip end tapered shape. The upheaval control mechanism was found to be explained by the cyclic elastoplastic contraction of the ground due to the up and down of the new CPG method.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 74 (2), I_886-I_891, 2018
Japan Society of Civil Engineers
