Title:
PROVISIONAL FACILITY FOR RETAINING EARTH BY USING GROUND ANCHORS AND GUIDE BRACKETS FOR STEPWISE RETENTION DURING DEEP EXCAVATION, AND METHOD FOR CONSTRUCTING SAME
Document Type and Number:
WIPO Patent Application WO/2024/053817
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a provisional facility for retaining earth by using ground anchors and guide brackets for stepwise retention during deep excavation, and a method for constructing same, wherein H-piles are installed before excavation, vertical ground anchors are installed between the H-piles, wales are installed such that guide brackets can be installed in excavation height positions in which excavation stepwise retention is necessary, guide brackets are installed on the middle portion of the wales such that, by using the fixing force from vertical ground anchors installed before excavation, the support force from the vertical ground anchors can be converted into a horizontal tensile force, ground anchor tensile members are induced/installed on the guide brackets and are fixed at the middle portion of the wales, the tensile members are then tensioned such that the load acting on the back surface of the wales is transferred to the H-piles through the wales, thereby acting as a support force, the H-piles thus play the retention role by means of the load acting on the back surface of the wales without installing separate retention members (for example, struts, rakers) on the ground excavation site, and multiple steps of retention can be supported without occupying other sites on the excavation back side even in a small space (wherein the back site is 1m or less) in the case of downtown deep excavation, thereby making the ground excavation operation safe, low-cost, and easy. In order to accomplish the above-mentioned purpose, a provisional facility for retaining earth by using ground anchors and guide brackets for stepwise retention during deep excavation according to the present invention are characterized in that ground anchors capable of multiple steps of retention in the vertical direction are installed between multiple H-piles disposed vertically at a predetermined interval, wales are installed such that guide brackets can be installed in excavation height positions in which excavation stepwise retention is necessary, guide brackets are installed on the middle portion of the wales such that, by using the fixing force from vertical ground anchors installed before excavation, the support force from the vertical ground anchors can be converted into a horizontal tensile force, ground anchor tensile members are induced/installed on the guide brackets, and the tensile members are then tensioned such that the load acting on the back surface of the wales is transferred to the H-piles through the wales, thereby acting as a support force. In addition, in order to accomplish the above-mentioned purpose, a method for constructing a provisional facility for retaining earth by using ground anchors and guide brackets for stepwise retention during deep excavation according to the present invention is a method for constructing a provisional facility for retaining earth by using ground anchors and guide brackets for stepwise retention during deep excavation, configured such that ground anchors capable of multiple steps of retention in the vertical direction are installed between multiple H-piles disposed vertically at a predetermined interval, wales are installed such that guide brackets can be installed in excavation height positions in which excavation stepwise retention is necessary, guide brackets are installed on the middle portion of the wales such that, by using the fixing force from vertical ground anchors installed before excavation, the support force from the vertical ground anchors can be converted into a horizontal tensile force, ground anchor tensile members are induced/installed on the guide brackets, and the tensile members are then tensioned such that the load acting on the back surface of the wales is transferred to the H-piles through the wales, thereby acting as a support force. The method comprises the steps of: forming multiple bored holes by excavating the ground with a predetermined diameter and to a predetermined depth; installing H-piles in the bored holes; installing multiple vertical ground anchors on wale rear portions between the installed H-piles; installing wales having guide brackets across the H-piles with regard to each excavation step; fixing tensile members installed on the ground anchors to the guide brackets; and tensioning the tensile members with a predetermined tension such that the middle portion of the wales is endowed with a load to the back-side ground. Accordingly, the retention force is maintained by using the multiple vertical ground anchors installed with regard to each deep excavation retention step.
Inventors:
OH YONG HWAN (KR)
Application Number:
PCT/KR2023/007142
Publication Date:
March 14, 2024
Filing Date:
May 25, 2023
Export Citation:
Assignee:
OH YONG HWAN (KR)
International Classes:
E02D17/04; E02D5/28; E02D17/08
Foreign References:
| JP2009185556A | 2009-08-20 | |||
| KR20180092499A | 2018-08-20 | |||
| KR101062179B1 | 2011-09-05 | |||
| KR102079720B1 | 2020-02-20 | |||
| KR100941669B1 | 2010-02-12 | |||
| KR102002059B1 | 2019-07-22 | |||
| KR20230030555A | 2023-03-06 |
Attorney, Agent or Firm:
LEE, Jae Rok (KR)
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