Method for ejecting ground improving grout into ground
US6302624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1998 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Jul 14, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D3/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
When an improving material used for ground improving construction is ejected into the ground, an improving material having a predetermined gel time is ejected through a vast number of points simultaneously or selectively from ejection ports provided in improving material transport passages such that the positions of the ejection ports are offset. The improving material can be ejected through the vast number of points as designed. A stroke, start and stop of an advancing and retreating movement adjusting device can be adjusted through a screw of the advancing and retreating movement adjusting device. A slide guide as a supporting mechanism is fitted to a slide bar so that even if a load deviated with respect to a piston rod is applied. The piston can be advanced and retreated smoothly, and an automatic on-off valve is interposed in the piston so that the improving material can be intaken and discharged smoothly. Since the improving material can be charged from the ejection ports through a vast number of points, it is possible to form a ground improved area having the same properties without deviation. The construction can be carried out as designed, the construction efficiency and a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.