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A platform for research: civil engineering, architecture and urbanism
Tunnel pile foundation underpinning construction method
The invention discloses a tunnel pile foundation underpinning construction method. The construction method comprises the following steps that S100, construction preparation is conducted; s200, a tunnel is constructed to an underpinning pile through a step method; s300, an advance support is constructed; s400, pile body concrete is broken and removed, and a primary support is constructed; s500, soil bodies on the two sides of the lower portion of the underpinning pile are excavated, and primary support sealing is conducted in time; s600, a side wall and an arch part second lining are poured; s700, after the second lining concrete reaches the design strength, the temporary cross braces are dismantled; s800, a bottom plate is constructed; and S900, the steps S200 to S800 are repeated till underpinning of all the pile foundations is completed. According to the tunnel pile foundation underpinning construction method, conversion of the load of the fire pool by the primary support and the secondary lining of the tunnel is effectively utilized, safety and normal use of the fire pool structure are guaranteed, the work amount is small, and investment can be saved. By means of the mechanism of passive underpinning, the pile foundations invading the tunnel are chiseled away and cut one by one step by step by means of the bearing capacity of the pile foundations, and safety and normal use of the fire pool structure are guaranteed.
本发明公开了一种隧道桩基托换施工方法，所述施工方法包括以下步骤：S100：施工准备；S200：隧道台阶法施工至托换桩；S300：施作超前支护；S400：桩身砼破除，施作初期支护；S500：开挖托换桩下部两侧土体，并及时进行初期支护封闭；S600：浇筑侧墙及拱部二衬；S700：二衬混凝土达到设计强度后，拆除临时横撑；S800：底板施工；S900：重复S200‑S800直至所有桩基托换完成。所述隧道桩基托换施工方法有效利用隧道初支及二衬对消防水池荷载的转化，保证了消防水池结构的安全和正常使用，而且工程量较小，可节省投资。利用被动托换的机理，依靠桩基自身承载力，分步、逐根对侵入隧道内桩基进行凿除、切割，保证了消防水池结构的安全和正常使用。
Tunnel pile foundation underpinning construction method
The invention discloses a tunnel pile foundation underpinning construction method. The construction method comprises the following steps that S100, construction preparation is conducted; s200, a tunnel is constructed to an underpinning pile through a step method; s300, an advance support is constructed; s400, pile body concrete is broken and removed, and a primary support is constructed; s500, soil bodies on the two sides of the lower portion of the underpinning pile are excavated, and primary support sealing is conducted in time; s600, a side wall and an arch part second lining are poured; s700, after the second lining concrete reaches the design strength, the temporary cross braces are dismantled; s800, a bottom plate is constructed; and S900, the steps S200 to S800 are repeated till underpinning of all the pile foundations is completed. According to the tunnel pile foundation underpinning construction method, conversion of the load of the fire pool by the primary support and the secondary lining of the tunnel is effectively utilized, safety and normal use of the fire pool structure are guaranteed, the work amount is small, and investment can be saved. By means of the mechanism of passive underpinning, the pile foundations invading the tunnel are chiseled away and cut one by one step by step by means of the bearing capacity of the pile foundations, and safety and normal use of the fire pool structure are guaranteed.
本发明公开了一种隧道桩基托换施工方法，所述施工方法包括以下步骤：S100：施工准备；S200：隧道台阶法施工至托换桩；S300：施作超前支护；S400：桩身砼破除，施作初期支护；S500：开挖托换桩下部两侧土体，并及时进行初期支护封闭；S600：浇筑侧墙及拱部二衬；S700：二衬混凝土达到设计强度后，拆除临时横撑；S800：底板施工；S900：重复S200‑S800直至所有桩基托换完成。所述隧道桩基托换施工方法有效利用隧道初支及二衬对消防水池荷载的转化，保证了消防水池结构的安全和正常使用，而且工程量较小，可节省投资。利用被动托换的机理，依靠桩基自身承载力，分步、逐根对侵入隧道内桩基进行凿除、切割，保证了消防水池结构的安全和正常使用。
Tunnel pile foundation underpinning construction method
一种隧道桩基托换施工方法
HUANG GANG (author) / XIA ZHENDE (author) / GAO HAOLIANG (author) / FENG JIANG (author) / LI YONG (author) / LI DEHONG (author) / ZHOU YUANYAO (author) / SHE YUHUA (author) / JIAO ZIQIU (author) / LUO RUI (author)
2023-05-02
Patent
Electronic Resource
Chinese
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