A Construction Method for Excavating a Foundation Pit Near a Deep-buried Large-diameter Pipeline
A construction method and large-diameter technology, applied in excavation, infrastructure engineering, construction, etc., can solve problems such as high leakage risk, deformation and cracking of pipelines, and close pipelines, and achieve the effect of ensuring safety
Active Publication Date: 2022-03-11
SINOHYDRO BUREAU 8 CO LTD
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Problems solved by technology
[0002] At present, most of the underground pipelines are combined prefabricated reinforced concrete structures, which are small in size, average in structural strength, poor in stability, and relatively high in safety risks. The following problems exist in the excavation of subway station foundation pits for large-diameter pipelines buried near the base: (1) The pipeline is too close to the bottom of the foundation pit, and there is no safe construction distance; (2) Some pipelines are constructed with socket-type concrete pipes, with many pipeline joints, and the risk of leakage is high; (3) The pipeline is located in the foundation pit, and the undisturbed soil remains on the upper part Fewer and thinner, the use of grouting and other methods of reinforcement will easily lead to deformation and cracking of the pipe
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[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.
[0033] Such as Figures 1 to 9 As shown, a construction method of the present invention for excavating a foundation pit near a deep-buried large-diameter pipeline, the construction process is: excavation of the first foundation pit 3 outside the area affected by the pipeline 1 → the second foundation pit 4 in the area affected by the pipeline 1 Excavation of the first layer 41 of the second foundation pit, the second layer 42 of the second foundation pit, and the first layer 51 of the third foundation pit of the third foundation pit 5 and the second layer 52 of the third foundation pit → pipeline 1 second The third layer 43 of the foundation pit is excavated in sections, and the fourth layer 44 of the second foundation p...
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The invention discloses a construction method for excavating a foundation pit adjacent to a deep-buried large-diameter pipeline, which comprises the following steps: excavating the earthwork of the foundation pit outside the affected area, excavating the earthwork of the foundation pit in the affected area in layers, sections and blocks, and a bottom plate construction. The invention has the advantages of safe construction when no active protection measures are taken for the pipeline.
Description
technical field [0001] The invention relates to the field of excavation of foundation pits of subway stations, in particular to a construction method for excavating foundation pits near deep-buried large-diameter pipelines. Background technique [0002] At present, most of the underground pipelines are combined prefabricated reinforced concrete structures, which are small in size, average in structural strength, poor in stability, and relatively high in safety risks. The following problems exist in the excavation of subway station foundation pits for large-diameter pipelines buried near the base: (1) The pipeline is too close to the bottom of the foundation pit, and there is no safe construction distance; (2) Some pipelines are constructed with socket-type concrete pipes, with many pipeline joints, and the risk of leakage is high; (3) The pipeline is located in the foundation pit, and the undisturbed soil remains on the upper part It is less and thinner, and reinforcement by...
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IPC IPC(8): E02D17/02
CPCE02D17/02
Inventor 曾晓武伍浩朱杰刘邦翦文斌曾绍军曾彬峻
Owner SINOHYDRO BUREAU 8 CO LTD