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A platform for research: civil engineering, architecture and urbanism
Miscellaneous fill foundation pit upside-down well wall reverse construction method excavation construction method
The invention provides a miscellaneous fill foundation pit upside-down well wall reverse construction method excavation construction method which comprises the steps that a plurality of foundation pits are excavated on the ground, a lock mouth ring beam is constructed on each foundation pit, after the lock mouth ring beams reach 75% of the design strength, excavation is conducted downwards to form a vertical shaft, when the foundation pits are excavated, the foundation pits are excavated at intervals, and a supporting structure is erected while excavation is conducted. After the foundation pit is excavated to the shaft bottom of the vertical shaft, the bottom of the shaft bottom is sealed, a bottom plate waterproof layer is constructed, an over-excavation area is backfilled, a formwork is installed, then a secondary lining structure is poured, and after all the vertical shaft structures reach the design strength, the formwork is removed, a top plate waterproof layer is constructed, a soil layer is backfilled, and a locking ring beam is removed; and after the construction of the vertical shaft is completed and the design strength is reached, top plate covering soil is backfilled, and the problems that in the prior art, when the backfill soil is subjected to underground construction, the underground excavation tunnel construction period is slow, the construction efficiency is low, and an open excavation method does not have a fender post construction space are solved.
本发明提供了一种杂填土基坑倒挂井壁逆作法开挖施工工法，包括在地面开挖多个基坑，并在每一基坑上施作锁口圈梁，待锁口圈梁达到设计强度75％后，向下开挖形成竖井,对基坑开挖时，基坑间隔开挖，边挖边架设支护结构,对开挖面喷射混凝土,基坑开挖至竖井的井底后对井底封底，并施作底板防水，对超挖区域回填,安装模板然后浇筑二衬结构,各竖井结构达到设计强度后，拆除模板并施作顶板防水层，回填土层,拆除锁口圈梁,对竖井施工完毕且达到设计强度后，回填顶板覆土，其解决了现有技术中存在的在对回填土进行地下施工时，暗挖隧道施工工期缓慢、施工效率低，而明挖法不具备围护桩施工空间的问题。
Miscellaneous fill foundation pit upside-down well wall reverse construction method excavation construction method
The invention provides a miscellaneous fill foundation pit upside-down well wall reverse construction method excavation construction method which comprises the steps that a plurality of foundation pits are excavated on the ground, a lock mouth ring beam is constructed on each foundation pit, after the lock mouth ring beams reach 75% of the design strength, excavation is conducted downwards to form a vertical shaft, when the foundation pits are excavated, the foundation pits are excavated at intervals, and a supporting structure is erected while excavation is conducted. After the foundation pit is excavated to the shaft bottom of the vertical shaft, the bottom of the shaft bottom is sealed, a bottom plate waterproof layer is constructed, an over-excavation area is backfilled, a formwork is installed, then a secondary lining structure is poured, and after all the vertical shaft structures reach the design strength, the formwork is removed, a top plate waterproof layer is constructed, a soil layer is backfilled, and a locking ring beam is removed; and after the construction of the vertical shaft is completed and the design strength is reached, top plate covering soil is backfilled, and the problems that in the prior art, when the backfill soil is subjected to underground construction, the underground excavation tunnel construction period is slow, the construction efficiency is low, and an open excavation method does not have a fender post construction space are solved.
本发明提供了一种杂填土基坑倒挂井壁逆作法开挖施工工法，包括在地面开挖多个基坑，并在每一基坑上施作锁口圈梁，待锁口圈梁达到设计强度75％后，向下开挖形成竖井,对基坑开挖时，基坑间隔开挖，边挖边架设支护结构,对开挖面喷射混凝土,基坑开挖至竖井的井底后对井底封底，并施作底板防水，对超挖区域回填,安装模板然后浇筑二衬结构,各竖井结构达到设计强度后，拆除模板并施作顶板防水层，回填土层,拆除锁口圈梁,对竖井施工完毕且达到设计强度后，回填顶板覆土，其解决了现有技术中存在的在对回填土进行地下施工时，暗挖隧道施工工期缓慢、施工效率低，而明挖法不具备围护桩施工空间的问题。
Miscellaneous fill foundation pit upside-down well wall reverse construction method excavation construction method
一种杂填土基坑倒挂井壁逆作法开挖施工工法
JIA JIANWEI (author) / CUI SHUNING (author) / CAI WEI (author) / REN LI (author) / SHAO WUTAO (author) / ZHANG CUNQING (author) / CHANG UN-DONG (author) / CHEN ZHE (author) / LINGHU YAN (author) / WANG PENG (author)
2024-08-09
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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