A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PILE CONSTRUCTION MANAGEMENT METHOD
PROBLEM TO BE SOLVED: To provide a pile construction management method capable of saving time and efforts for re-implementation of pile erection construction caused due to an insufficient support strength, by extremely easily and surely determining, before pile erection, whether a pile distal end support strength of a pile hole is sufficient when erecting a cast-in-place pile or a precast pile within the pile hole that is opened on a ground.SOLUTION: After a pile hole H is opened on a ground G and before erecting a pile in the pile hole H, a penetration test machine 10 is inserted into the pile hole H and grounded. The penetration test machine comprises: a shaft-like knocking block 1 of which the distal end protrudes downwards; a drive hammer 2 which freely falls to strike the knocking block 1; and a suspension mechanism 3 which suspends the fallen drive hammer 2 and releases it down at a predetermined height. A support strength of a hole bottom Hb is determined from the number of times of striking required for the knocking block 1 to penetrate up to a predetermined depth from the hole bottom Hb. In the case where the support strength is equal to or more than a predetermined value, the pile is erected in the pile hole H.SELECTED DRAWING: Figure 1
【課題】地盤に穿設した杭孔内に場所打ち杭や既製杭を建て込む際、杭孔の杭先端支持力が充分であるか否かを杭建て込み前に極めて簡易に確実に判定可能とし、支持強度不足による杭建て込み施工のやり直しの手間を省き得る杭施工管理方法を提供する。【解決手段】地盤Ｇに杭孔Ｈを穿設後、杭孔Ｈへの杭の建て込み前に、先端が下向きに突出する軸状のノッキングブロック１と、該ノッキングブロック１を自由落下によって打撃するドライブハンマー２と、落下後のドライブハンマー２を吊り上げて所定高さで下放する吊上げ機構３とを備える貫入試験機１０を杭孔Ｈに挿入して着底させ、ノッキングブロック１が孔底Ｈｂから所定深さまで貫入するのに要する打撃回数から孔底Ｈｂの支持強度を判定し、該支持強度が所定値以上である場合に該杭孔Ｈに杭を建て込む。【選択図】図１
PILE CONSTRUCTION MANAGEMENT METHOD
PROBLEM TO BE SOLVED: To provide a pile construction management method capable of saving time and efforts for re-implementation of pile erection construction caused due to an insufficient support strength, by extremely easily and surely determining, before pile erection, whether a pile distal end support strength of a pile hole is sufficient when erecting a cast-in-place pile or a precast pile within the pile hole that is opened on a ground.SOLUTION: After a pile hole H is opened on a ground G and before erecting a pile in the pile hole H, a penetration test machine 10 is inserted into the pile hole H and grounded. The penetration test machine comprises: a shaft-like knocking block 1 of which the distal end protrudes downwards; a drive hammer 2 which freely falls to strike the knocking block 1; and a suspension mechanism 3 which suspends the fallen drive hammer 2 and releases it down at a predetermined height. A support strength of a hole bottom Hb is determined from the number of times of striking required for the knocking block 1 to penetrate up to a predetermined depth from the hole bottom Hb. In the case where the support strength is equal to or more than a predetermined value, the pile is erected in the pile hole H.SELECTED DRAWING: Figure 1
【課題】地盤に穿設した杭孔内に場所打ち杭や既製杭を建て込む際、杭孔の杭先端支持力が充分であるか否かを杭建て込み前に極めて簡易に確実に判定可能とし、支持強度不足による杭建て込み施工のやり直しの手間を省き得る杭施工管理方法を提供する。【解決手段】地盤Ｇに杭孔Ｈを穿設後、杭孔Ｈへの杭の建て込み前に、先端が下向きに突出する軸状のノッキングブロック１と、該ノッキングブロック１を自由落下によって打撃するドライブハンマー２と、落下後のドライブハンマー２を吊り上げて所定高さで下放する吊上げ機構３とを備える貫入試験機１０を杭孔Ｈに挿入して着底させ、ノッキングブロック１が孔底Ｈｂから所定深さまで貫入するのに要する打撃回数から孔底Ｈｂの支持強度を判定し、該支持強度が所定値以上である場合に該杭孔Ｈに杭を建て込む。【選択図】図１
PILE CONSTRUCTION MANAGEMENT METHOD
杭施工管理方法
KASHIMOTO TAKAHIKO (author)
2017-06-29
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
| European Patent Office | 2020
PILE CONSTRUCTION METHOD AND PILE CONSTRUCTION MANAGEMENT SYSTEM
| European Patent Office | 2019
| European Patent Office | 2015
| European Patent Office | 2020