Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for reinforcing existing concrete inner support of foundation pit
The invention relates to a construction method for reinforcing an existing concrete inner support of a foundation pit. A plurality of stand columns used for supporting are arranged below the existing concrete support at intervals. In the foundation pit excavation process, before completion of at least one layer of existing concrete support, preparation of continuous excavation and construction of the next layer of concrete support, the following steps are carried out: S1, the following operations are simultaneously or sequentially carried out: steel bars are planted on an enclosure structure below the existing concrete support, and a steel structure bracket is connected; a steel bar sealing formwork is bound on the steel structure bracket, concrete is poured, and arrangement of an end concrete waist beam and the concrete bracket is completed; a bracket for supporting the weight of the prestressed steel support is fixedly arranged at the same height of the side edge of the stand column and the end concrete waist beam; and S3, secondary grouting is conducted on gaps in the ends of the prestressed steel supports, prestress is applied to the ends of the prestressed steel supports, and reinforcement is completed.
本发明涉及一种对基坑既有混凝土内支撑加固施工方法，既有混凝土支撑下方间隔设有多个用于支撑的立柱；在基坑开挖过程中，完成至少一层既有混凝土支撑，并准备继续开挖并进行下一层混凝土支撑的施工之前，进行以下步骤：S1、同时或先后地进行以下操作：在既有混凝土支撑下方的围护结构上植筋并连接钢结构牛腿，在钢结构牛腿上绑钢筋封模板，浇筑混凝土，完成端部混凝土腰梁及混凝土牛腿的设置；在立柱侧边与端部混凝土腰梁等高处固定设置用以支承预应力钢支撑重量的支架；S2、拉定位直线，安装预应力钢支撑：S3、在预应力钢支撑端头的缝隙进行二次注浆，预应力钢支撑端部进行预应力施加，完成加固。
Construction method for reinforcing existing concrete inner support of foundation pit
The invention relates to a construction method for reinforcing an existing concrete inner support of a foundation pit. A plurality of stand columns used for supporting are arranged below the existing concrete support at intervals. In the foundation pit excavation process, before completion of at least one layer of existing concrete support, preparation of continuous excavation and construction of the next layer of concrete support, the following steps are carried out: S1, the following operations are simultaneously or sequentially carried out: steel bars are planted on an enclosure structure below the existing concrete support, and a steel structure bracket is connected; a steel bar sealing formwork is bound on the steel structure bracket, concrete is poured, and arrangement of an end concrete waist beam and the concrete bracket is completed; a bracket for supporting the weight of the prestressed steel support is fixedly arranged at the same height of the side edge of the stand column and the end concrete waist beam; and S3, secondary grouting is conducted on gaps in the ends of the prestressed steel supports, prestress is applied to the ends of the prestressed steel supports, and reinforcement is completed.
本发明涉及一种对基坑既有混凝土内支撑加固施工方法，既有混凝土支撑下方间隔设有多个用于支撑的立柱；在基坑开挖过程中，完成至少一层既有混凝土支撑，并准备继续开挖并进行下一层混凝土支撑的施工之前，进行以下步骤：S1、同时或先后地进行以下操作：在既有混凝土支撑下方的围护结构上植筋并连接钢结构牛腿，在钢结构牛腿上绑钢筋封模板，浇筑混凝土，完成端部混凝土腰梁及混凝土牛腿的设置；在立柱侧边与端部混凝土腰梁等高处固定设置用以支承预应力钢支撑重量的支架；S2、拉定位直线，安装预应力钢支撑：S3、在预应力钢支撑端头的缝隙进行二次注浆，预应力钢支撑端部进行预应力施加，完成加固。
Construction method for reinforcing existing concrete inner support of foundation pit
对基坑既有混凝土内支撑加固施工方法
HUANG WEI (Autor:in) / LIU JIANPENG (Autor:in) / WANG ZHEN (Autor:in) / TANG TAO (Autor:in)
12.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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