AGITATION METHOD, AND AGITATION DEVICE
To stably supply an improvement material and to prevent clogging of a discharge port of an improvement material.SOLUTION: In an agitation method, an agitation device 10 is made to penetrate a ground to agitate the ground, in which the agitation device 10 is attached to a work machine of a heavy mach...
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Zusammenfassung: | To stably supply an improvement material and to prevent clogging of a discharge port of an improvement material.SOLUTION: In an agitation method, an agitation device 10 is made to penetrate a ground to agitate the ground, in which the agitation device 10 is attached to a work machine of a heavy machine, and rotates a pair of agitation blades 14 provided at a tip of an elongated rod portion 12 and discharges an improvement material toward a tip of the rod portion 12. The improvement material is discharged both when the agitation device 10 penetrates into the ground and when the agitation device 10 is pulled out from the ground. Thus, a designed injection amount of the improvement material is injected separately at the time of penetration into the ground and at the time of pulling-out, so a flow rate of the improvement material to be injected at the time of penetration is reduced. Therefore, when the agitation device 10 penetrates, the improvement material can be stably discharged without placing an excessive load on the pump. Furthermore, by discharging the improvement material even when the agitation device 10 is pulled out, it is possible to prevent a discharge port 30a of the improvement material from being blocked by soil to improve workability and quality.SELECTED DRAWING: Figure 1
【課題】改良材を安定して供給すると共に、改良材の吐出口の閉塞を防止する。【解決手段】本発明の実施の形態に係る撹拌工法は、重機の作業機に取り付けられ、長尺状のロッド部12の先端に設けられた一対の撹拌翼14を回転させると共に、ロッド部12の先端に向かって改良材を吐出する撹拌装置10を地盤へ貫入して、地盤を撹拌するものであって、撹拌装置10の地盤への貫入時と地盤からの引き抜き時との双方において、改良材を吐出するものである。これにより、改良材の設計注入量を、地盤への貫入時と引き抜き時とに分けて注入することになるため、貫入時に注入すべき改良材の流量が減少する。従って、撹拌装置10の貫入時に、ポンプに過剰な負荷をかけることなく、安定して改良材を吐出することができる。更に、撹拌装置10の引き抜き時にも改良材を吐出することで、改良材の吐出口30aが土によって閉塞することを防止することができ、施工性及び品質を向上させることができる。【選択図】図1 |
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