A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Foundation pit stand column underpinning method
The invention relates to the technical field of foundation pit engineering construction, and discloses a foundation pit stand column underpinning method. The foundation pit stand column underpinning method comprises the following steps that jacking force of a supporting beam is loaded step by step, and the beam surface displacement of the supporting beam is monitored; if the beam surface displacement of the support beam is greater than the first preset displacement, stopping loading; after each stage of loading is completed, if the beam surface displacement amount of the supporting beam is smaller than a second preset displacement amount and lasts for preset time, next stage of loading is carried out; after step-by-step loading is completed, the loaded jacking force is kept, and the stand columns needing underpinning are dismantled; the jacking force of the supporting beam continues to be loaded, and the beam surface displacement amount of the supporting beam is controlled to be a third preset displacement amount; and if the jacking force loaded by the supporting beam is larger than the preset jacking force value, loading is stopped. According to the invention, the jacking force applied to the jack is controlled, so that the jacking force of the jack does not exceed the bearing capacity of the supporting beam, and the uncertainty of the stress of the fulcrum in the stand column underpinning process is reduced to the greatest extent.
本发明涉及基坑工程施工技术领域，公开一种基坑立柱托换方法。所述基坑立柱托换方法包括以下步骤：逐级加载支撑梁的顶升力，并监测支撑梁的梁面位移量；若支撑梁的梁面位移量大于第一预设位移量，则停止加载；每级加载完成后，若支撑梁的梁面位移量小于第二预设位移量且持续预设时间，则进行下一级加载；逐级加载完成后，保持已加载的顶升力，拆除需要托换的立柱；继续加载支撑梁的顶升力，并控制支撑梁的梁面位移量为第三预设位移量；若支撑梁加载的顶升力大于预设顶升力值，则停止加载。本发明实现了对千斤顶施加顶升力的控制，从而保证千斤顶顶升力不超过支撑梁的承载力，最大程度地降低了立柱托换过程中支点受力的不确定性。
Foundation pit stand column underpinning method
The invention relates to the technical field of foundation pit engineering construction, and discloses a foundation pit stand column underpinning method. The foundation pit stand column underpinning method comprises the following steps that jacking force of a supporting beam is loaded step by step, and the beam surface displacement of the supporting beam is monitored; if the beam surface displacement of the support beam is greater than the first preset displacement, stopping loading; after each stage of loading is completed, if the beam surface displacement amount of the supporting beam is smaller than a second preset displacement amount and lasts for preset time, next stage of loading is carried out; after step-by-step loading is completed, the loaded jacking force is kept, and the stand columns needing underpinning are dismantled; the jacking force of the supporting beam continues to be loaded, and the beam surface displacement amount of the supporting beam is controlled to be a third preset displacement amount; and if the jacking force loaded by the supporting beam is larger than the preset jacking force value, loading is stopped. According to the invention, the jacking force applied to the jack is controlled, so that the jacking force of the jack does not exceed the bearing capacity of the supporting beam, and the uncertainty of the stress of the fulcrum in the stand column underpinning process is reduced to the greatest extent.
本发明涉及基坑工程施工技术领域，公开一种基坑立柱托换方法。所述基坑立柱托换方法包括以下步骤：逐级加载支撑梁的顶升力，并监测支撑梁的梁面位移量；若支撑梁的梁面位移量大于第一预设位移量，则停止加载；每级加载完成后，若支撑梁的梁面位移量小于第二预设位移量且持续预设时间，则进行下一级加载；逐级加载完成后，保持已加载的顶升力，拆除需要托换的立柱；继续加载支撑梁的顶升力，并控制支撑梁的梁面位移量为第三预设位移量；若支撑梁加载的顶升力大于预设顶升力值，则停止加载。本发明实现了对千斤顶施加顶升力的控制，从而保证千斤顶顶升力不超过支撑梁的承载力，最大程度地降低了立柱托换过程中支点受力的不确定性。
Foundation pit stand column underpinning method
一种基坑立柱托换方法
HUANG ZHIXING (author) / MA ZHUO (author) / ZHANG JUN (author) / WU XUJUN (author) / JIANG XIAOGUANG (author) / XU XINYU (author) / PARK WOON-IL (author)
2022-03-08
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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