Calculation method for additional loads of adjacent underground pipelines caused by ground access shield tunneling
An additional load, access type technology, applied in the direction of calculation, design optimization/simulation, instrument, etc., can solve the problem of calculation result error and so on
Active Publication Date: 2019-08-06
广东建同工程技术咨询有限公司
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[0004] However, the buried depth of the ground access shield tunnel is relatively shallow, so it is closely adjacent to the underground pipeline. If the diameter of the pipeline is ignored and calculated according to the above method, the error in the calculation result of the additional stress will be relatively large
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[0132] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0133] Such as Figure 1~5As shown, the present invention provides a specific embodiment of the calculation method for the additional load adjacent to the underground pipeline caused by the construction of the ground access shield tunnel, in order to solve the problem of the size of the additional load adjacent to the underground pipeline caused by this special working condition, and to provide future on-site construction And theoretical research provides the basis for the formula. This patent considers the angle β between the shield axis and the horizontal plane (that is, the change in tunnel depth), and proposes the soil mass caused by the frontal additional thrust, shield shell friction, additional grouting pressure, and soil loss. Additional stress calculation formula; when calculating the additional stress of the pipeline, s...
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The invention provides a computing method for neighboring underground pipeline additional load caused by ground in-out type shield construction. In order to solve the problem of the magnitude of the neighboring underground pipeline additional load caused by the special working condition, and provide a formula foundation for site construction and theoretical research in future, according to the computing method, a brand-new soil body additional stress computational formula caused by front additional thrust, shield shell friction force, additional grouting pressure and soil body loss is provided by taking into account an included angle beta (namely tunnel buried depth change) of a shield axis and a horizontal plane; when the additional stress of a pipeline is computed, a plurality of points on the same cross section are taken to compute corresponding additional stress values respectively, then the additional stress values are averaged to obtain the additional stress of the pipeline on the cross section, and finally the projection of a pipeline arc is multiplied at the position of the axis horizontal plane to obtain the additional load of the pipeline.
Description
technical field [0001] The invention relates to a method for calculating the additional load of adjacent underground pipelines caused by the construction of a ground access type shield tunnel, and belongs to the technical field of underground engineering. Background technique [0002] The existing research objects only focus on the construction of pipe jacking, horizontal shield tunneling and double-circle shield tunneling, and there is no derivation of the calculation formula for the additional stress of the soil caused by the construction of the ground entry and exit shield tunneling at a certain angle, and there is no ground entry and exit shield construction. Research on additional loads generated by shield construction on adjacent pipelines. [0003] In the past, when scholars calculated the additional load of the pipeline, due to the large distance between the pipeline and the shield tunnel, the diameter of the pipeline was ignored. The projection at the horizontal pl...
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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 魏纲姜鑫林雄朱田宇王霄黄文华鑫欣许讯洪子涵张鑫海
Owner 广东建同工程技术咨询有限公司