Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Foundation pit support structure under clearance limitation and construction method thereof
The invention relates to the technical field of foundation pit support, in particular to a foundation pit support structure under clearance limitation and a construction method of the foundation pit support structure. The method comprises the steps that grooving and soil unloading are conducted on the original ground along a foundation pit to be excavated so that the clearance requirement of construction equipment can be met; drilling piles are arranged in the pull grooves; a steel sheet pile is arranged on the outer side of the drilled pile, and grouting treatment is conducted between the steel sheet pile and the drilled pile; the vertical steel mold lifts the drilled pile to the position above the original ground; a top beam is arranged on the top face of the drilled pile on each side, and a concrete support is arranged between the top beams on the opposite sides; the outer side of the drilling pile is backfilled with a part of soil body excavated by the groove pulling; wherein the bored pile is lifted, so that the bored pile is exposed out of the original ground before groove broaching, and the top beams on the bored pile and the concrete support between the top beams are exposed out of the original ground before groove broaching. According to the scheme, the problems that in the prior art, railway bridges, viaducts and the like are low away from the ground, and when foundation pits are excavated under the bridges, large-scale construction equipment is difficult to efficiently and stably carry out operation due to clearance limitation are solved.
本发明涉及基坑围护技术领域，特别涉及一种净空受限下的基坑围护结构及其施工方法。本发明的方法包括：沿着待挖基坑对原地面进行开槽卸土，以满足施工设备的净空要求；在拉槽内设置钻孔桩；在钻孔桩外侧设置钢板桩，并且在钢板桩和钻孔桩之间进行注浆处理；立钢模将钻孔桩升高至原地面以上；在每侧的钻孔桩顶面设置冠梁，并且在相对侧的冠梁之间设置混凝土支撑；在钻孔桩外侧回填拉槽开挖的部分土体；其中，抬高钻孔桩，使得钻孔桩露出拉槽前的原地面，并且钻孔桩上的冠梁以及冠梁之间的混凝土支撑露出拉槽前的原地面。本方案解决现有技术中铁路桥、高架桥等距离地面的高度较低，在这些桥下开挖基坑时大型施工设备由于净空受限而难以高效和稳定地开展作业的问题。
Foundation pit support structure under clearance limitation and construction method thereof
The invention relates to the technical field of foundation pit support, in particular to a foundation pit support structure under clearance limitation and a construction method of the foundation pit support structure. The method comprises the steps that grooving and soil unloading are conducted on the original ground along a foundation pit to be excavated so that the clearance requirement of construction equipment can be met; drilling piles are arranged in the pull grooves; a steel sheet pile is arranged on the outer side of the drilled pile, and grouting treatment is conducted between the steel sheet pile and the drilled pile; the vertical steel mold lifts the drilled pile to the position above the original ground; a top beam is arranged on the top face of the drilled pile on each side, and a concrete support is arranged between the top beams on the opposite sides; the outer side of the drilling pile is backfilled with a part of soil body excavated by the groove pulling; wherein the bored pile is lifted, so that the bored pile is exposed out of the original ground before groove broaching, and the top beams on the bored pile and the concrete support between the top beams are exposed out of the original ground before groove broaching. According to the scheme, the problems that in the prior art, railway bridges, viaducts and the like are low away from the ground, and when foundation pits are excavated under the bridges, large-scale construction equipment is difficult to efficiently and stably carry out operation due to clearance limitation are solved.
本发明涉及基坑围护技术领域，特别涉及一种净空受限下的基坑围护结构及其施工方法。本发明的方法包括：沿着待挖基坑对原地面进行开槽卸土，以满足施工设备的净空要求；在拉槽内设置钻孔桩；在钻孔桩外侧设置钢板桩，并且在钢板桩和钻孔桩之间进行注浆处理；立钢模将钻孔桩升高至原地面以上；在每侧的钻孔桩顶面设置冠梁，并且在相对侧的冠梁之间设置混凝土支撑；在钻孔桩外侧回填拉槽开挖的部分土体；其中，抬高钻孔桩，使得钻孔桩露出拉槽前的原地面，并且钻孔桩上的冠梁以及冠梁之间的混凝土支撑露出拉槽前的原地面。本方案解决现有技术中铁路桥、高架桥等距离地面的高度较低，在这些桥下开挖基坑时大型施工设备由于净空受限而难以高效和稳定地开展作业的问题。
Foundation pit support structure under clearance limitation and construction method thereof
净空受限下的基坑围护结构及其施工方法
LI DONGSHENG (Autor:in) / YANG WEIDONG (Autor:in) / SONG FUGUI (Autor:in) / XIA JIE (Autor:in) / WU TING (Autor:in) / ZHANG JIAWEI (Autor:in)
09.08.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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