A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Foundation pit excavation method of main pier bearing platform cofferdam
The invention provides a foundation pit excavation method for a main pier bearing platform cofferdam, and relates to the technical field of bridge construction, and the method comprises the following steps: after steel plates and pipe piles are inserted and driven, reserving an excavator in the cofferdam, cleaning the field in the range of the cofferdam and around the cofferdam, and integrally pulling out, cutting and transferring a steel casing; an excavator is reserved in the cofferdam to start first-time excavation, and two ramps are reserved in the excavation process to serve as excavator access channels for use; a basin type excavation mode is adopted, and the foundation pit is divided into a left area and a right area with the center line of the straining beam as the benchmark; according to the method, two times of excavation are adopted, the first time of excavation adopts a basin type excavation mode, the interior of the foundation pit is divided into a left area and a right area according to the plane with the center line of the tie beam as the benchmark, excavation is conducted respectively, the second time of excavation is conducted, the interior of the foundation pit is divided into two areas according to the plane, layered excavation is conducted respectively, the symmetry and balance principle is followed, and the method is more stable; the enclosing purlins and the inner supports are installed between two times of excavation, support deformation and foundation pit collapse are avoided, and safety is higher.
本发明提供了一种主墩承台围堰的基坑开挖方法，涉及桥梁施工技术领域，包括以下步骤：钢板、管桩插打完成后，将挖机预留在围堰内，清理围堰范围内及周边的场地，进行钢护筒整体拔除与切割转运；围堰内预留挖机开始第一次开挖，在开挖过程中留出两条坡道作为挖机进出通道使用；采用盆式开挖的方式，以系梁中心线为基准将基坑分为左右2个区；本发明采用两次开挖的方式，第一次开挖采用盆式开挖的方式，以系梁中心线为基准将基坑内按平面分为左右2个区，分别进行开挖，第二次开挖，将基坑内按平面分为2个区，分别进行分层开挖，遵循对称、均衡的原则，更加稳定，在两次开挖之间进行围檩、内支撑安装，避免支护变形、基坑坍塌，更加安全。
Foundation pit excavation method of main pier bearing platform cofferdam
The invention provides a foundation pit excavation method for a main pier bearing platform cofferdam, and relates to the technical field of bridge construction, and the method comprises the following steps: after steel plates and pipe piles are inserted and driven, reserving an excavator in the cofferdam, cleaning the field in the range of the cofferdam and around the cofferdam, and integrally pulling out, cutting and transferring a steel casing; an excavator is reserved in the cofferdam to start first-time excavation, and two ramps are reserved in the excavation process to serve as excavator access channels for use; a basin type excavation mode is adopted, and the foundation pit is divided into a left area and a right area with the center line of the straining beam as the benchmark; according to the method, two times of excavation are adopted, the first time of excavation adopts a basin type excavation mode, the interior of the foundation pit is divided into a left area and a right area according to the plane with the center line of the tie beam as the benchmark, excavation is conducted respectively, the second time of excavation is conducted, the interior of the foundation pit is divided into two areas according to the plane, layered excavation is conducted respectively, the symmetry and balance principle is followed, and the method is more stable; the enclosing purlins and the inner supports are installed between two times of excavation, support deformation and foundation pit collapse are avoided, and safety is higher.
本发明提供了一种主墩承台围堰的基坑开挖方法，涉及桥梁施工技术领域，包括以下步骤：钢板、管桩插打完成后，将挖机预留在围堰内，清理围堰范围内及周边的场地，进行钢护筒整体拔除与切割转运；围堰内预留挖机开始第一次开挖，在开挖过程中留出两条坡道作为挖机进出通道使用；采用盆式开挖的方式，以系梁中心线为基准将基坑分为左右2个区；本发明采用两次开挖的方式，第一次开挖采用盆式开挖的方式，以系梁中心线为基准将基坑内按平面分为左右2个区，分别进行开挖，第二次开挖，将基坑内按平面分为2个区，分别进行分层开挖，遵循对称、均衡的原则，更加稳定，在两次开挖之间进行围檩、内支撑安装，避免支护变形、基坑坍塌，更加安全。
Foundation pit excavation method of main pier bearing platform cofferdam
一种主墩承台围堰的基坑开挖方法
RAO FANGPING (author) / LIU AILIAN (author) / LI WEIHONG (author) / XU ZHEN (author) / LIU KAI (author) / LIANG XIANWEI (author) / WANG CHENG (author) / YANG LIN (author) / ZHOU SHENGYU (author) / WANG ZHENGXING (author)
2024-08-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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