A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of pile body pretreatment in shield pile grinding process
The invention provides a construction method of pile body pretreatment in a shield pile grinding process. The construction method before pile grinding comprises the following steps that a coring drillis provided; a pile head covering layer is removed and a main rib position is found; the drilling position and the aperture of the coring drill are determined at the top of the pile body in combination with the main rib position; a flushing liquid is blended, and the coring drill is used for drilling and coring in the determined drilling position, and flushing a drilled hole by cooperating with the flushing liquid; and after drilling is completed and the main rib is taken out, the drilled holes are backfilled and blocked. According to the construction method, drilling is carried out on the outer side of the main rib by adopting the coring drill, the drilling depth is from the pile top to the pile bottom, the main rib can be taken out, and the influence of the main rib on the structural strength of the pile body can be weakened; after the main rib is taken out, the situation that a cutter head pulls a steel bar and the steel bar is involved in a screw machine can be avoided; and the part, without the main rib, of the pile body is drilled, the structural strength of the pile body can be further weakened, the pile grinding difficulty of a shield machine is reduced, and the damage ofthe pile body structure to a cutter is reduced.
本发明提供了一种盾构磨桩工艺中桩体预处理的施工方法，在磨桩之前进行以下步骤：提供取芯钻；清除桩头覆盖层并寻找主筋位置；结合主筋位置，在桩体的顶部确定取芯钻的钻孔位置及孔径；调配冲洗液，采用取芯钻在确定的钻孔位置进行钻孔取芯并配合冲洗液对钻孔进行冲洗；钻孔完成取出主筋后，对各钻孔进行回填封堵。本发明采用取芯钻在主筋的外侧进行钻孔，且钻孔的深度为桩顶至桩底，能够将主筋取出，削弱主筋对桩体的结构强度的影响，主筋取出后，还能够避免刀盘拉扯到钢筋，钢筋卷入螺机内的状况发生，对桩体无主筋的部位进行钻孔，能够进一步削弱桩体的结构强度，降低盾构机磨桩的难度，减小桩体结构对刀具的损坏。
Construction method of pile body pretreatment in shield pile grinding process
The invention provides a construction method of pile body pretreatment in a shield pile grinding process. The construction method before pile grinding comprises the following steps that a coring drillis provided; a pile head covering layer is removed and a main rib position is found; the drilling position and the aperture of the coring drill are determined at the top of the pile body in combination with the main rib position; a flushing liquid is blended, and the coring drill is used for drilling and coring in the determined drilling position, and flushing a drilled hole by cooperating with the flushing liquid; and after drilling is completed and the main rib is taken out, the drilled holes are backfilled and blocked. According to the construction method, drilling is carried out on the outer side of the main rib by adopting the coring drill, the drilling depth is from the pile top to the pile bottom, the main rib can be taken out, and the influence of the main rib on the structural strength of the pile body can be weakened; after the main rib is taken out, the situation that a cutter head pulls a steel bar and the steel bar is involved in a screw machine can be avoided; and the part, without the main rib, of the pile body is drilled, the structural strength of the pile body can be further weakened, the pile grinding difficulty of a shield machine is reduced, and the damage ofthe pile body structure to a cutter is reduced.
本发明提供了一种盾构磨桩工艺中桩体预处理的施工方法，在磨桩之前进行以下步骤：提供取芯钻；清除桩头覆盖层并寻找主筋位置；结合主筋位置，在桩体的顶部确定取芯钻的钻孔位置及孔径；调配冲洗液，采用取芯钻在确定的钻孔位置进行钻孔取芯并配合冲洗液对钻孔进行冲洗；钻孔完成取出主筋后，对各钻孔进行回填封堵。本发明采用取芯钻在主筋的外侧进行钻孔，且钻孔的深度为桩顶至桩底，能够将主筋取出，削弱主筋对桩体的结构强度的影响，主筋取出后，还能够避免刀盘拉扯到钢筋，钢筋卷入螺机内的状况发生，对桩体无主筋的部位进行钻孔，能够进一步削弱桩体的结构强度，降低盾构机磨桩的难度，减小桩体结构对刀具的损坏。
Construction method of pile body pretreatment in shield pile grinding process
盾构磨桩工艺中桩体预处理的施工方法
MA HENGYUAN (author) / TANG LIXIAN (author) / LI HUAFEI (author) / ZHAO GUANGJUN (author) / ZHANG SANGSANG (author) / CHEN SHIGUANG (author) / CAI ZHENWANG (author)
2020-04-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Construction method of expansive soil stratum shield grinding pile
| European Patent Office | 2021