CN108596376A - Novel method for predicting surface subsidence caused by subway tunnel construction - Google Patents
Novel method for predicting surface subsidence caused by subway tunnel construction Download PDFInfo
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Abstract
本发明公开了一种新的地铁隧道施工引起地表沉降预测方法，地铁隧道偏压程度判断，通过最大主应力的偏转程度反映隧道偏压程度，定义最大主应力偏转角度为偏压系数，并计算得到地表沉降槽中心偏移距离；分析地铁施工中地表沉降因素，地表沉降槽的扭曲和偏位由偏压地形和偏压荷载的双重影响叠加，建立地表沉降计算模型；计算偏压地形影响，得到偏压地形影响下的地层任意点沉降规律；计算偏压荷载影响，得到偏压荷载影响下的地层任意点沉降规律；将偏压地形和偏压荷载作用结果叠加，代入地铁隧道相关参数，建立预测沉降曲线，预测地铁隧道地表沉降规律。本发明的有益效果是能够较为准确的预测地铁施工中隧道沉降规律。The invention discloses a new method for predicting the ground subsidence caused by subway tunnel construction, judging the bias degree of the subway tunnel, reflecting the tunnel bias degree through the deflection degree of the maximum principal stress, defining the maximum principal stress deflection angle as the bias coefficient, and calculating Obtain the offset distance of the center of the surface settlement tank; analyze the surface settlement factors in the subway construction, the distortion and deviation of the surface settlement tank are superimposed by the dual effects of bias terrain and bias load, and establish a calculation model for surface settlement; calculate the influence of bias terrain, Obtain the settlement law of any point in the stratum under the influence of biased terrain; calculate the influence of biased load to obtain the settlement law of any point in the stratum under the influence of biased load; superimpose the results of biased terrain and biased load, and substitute it into the relevant parameters of the subway tunnel, Establish the predicted settlement curve to predict the surface settlement law of the subway tunnel. The beneficial effect of the invention is that it can more accurately predict the law of tunnel settlement in subway construction.
Description
技术领域technical field
本发明属于隧道施工技术领域，涉及基于有限正则域二维弹性边值问题解析解的一种新的地铁隧道施工引起地表沉降预测方法。The invention belongs to the technical field of tunnel construction, and relates to a new method for predicting ground surface settlement caused by subway tunnel construction based on the analytical solution of a two-dimensional elastic boundary value problem in a finite regular domain.
背景技术Background technique
我国目前城市地下轨道交通大规模建设，带来城市地表沉降地质灾害问题尤为突出。然而，城市地质条件复杂多变给地表沉降灾害的准确预测带来困难。At present, the large-scale construction of urban underground rail transit in my country has brought about the problem of geological disasters of urban surface subsidence, which is particularly prominent. However, the complex and changeable urban geological conditions make it difficult to accurately predict land subsidence disasters.
发明内容Contents of the invention
本发明的目的在于提供一种新的地铁隧道施工引起地表沉降预测方法，本发明的有益效果是能够较为准确的预测地铁施工中隧道沉降规律。The purpose of the present invention is to provide a new method for predicting ground surface settlement caused by subway tunnel construction. The beneficial effect of the present invention is that it can more accurately predict the law of tunnel settlement during subway construction.
本发明所采用的技术方案是按照以下步骤进行：The technical scheme adopted in the present invention is to carry out according to the following steps:
第一步：地铁隧道偏压程度判断，通过最大主应力的偏转程度反映隧道偏压程度，定义最大主应力偏转角度为偏压系数，并计算得到地表沉降槽中心偏移距离；Step 1: Judging the bias degree of the subway tunnel, reflecting the degree of tunnel bias through the deflection degree of the maximum principal stress, defining the maximum principal stress deflection angle as the bias coefficient, and calculating the offset distance of the center of the surface settlement tank;
第二步：分析地铁施工中地表沉降因素，地表沉降槽的扭曲和偏位由偏压地形和偏压荷载的双重影响叠加，建立地表沉降计算模型；The second step: analyze the surface settlement factors in the subway construction, the distortion and deviation of the surface settlement trough are superimposed by the double influence of the bias terrain and bias load, and establish the calculation model of the surface settlement;
第三步：计算偏压地形影响，得到偏压地形影响下的地层任意点沉降规律；Step 3: Calculate the influence of bias topography, and obtain the settlement law of any point in the formation under the influence of bias topography;
第四步：计算偏压荷载影响，得到偏压荷载影响下的地层任意点沉降规律；Step 4: Calculate the influence of eccentric load, and obtain the settlement law of any point in the formation under the influence of eccentric load;
第五步：将偏压地形和偏压荷载作用结果叠加，代入地铁隧道相关参数，建立预测沉降曲线，预测地铁隧道地表沉降规律。Step 5: Superimpose the results of bias terrain and bias load, substitute into the relevant parameters of the subway tunnel, establish the predicted settlement curve, and predict the surface settlement law of the subway tunnel.
具体实施方式Detailed ways
下面结合具体实施方式对本发明进行详细说明。The present invention will be described in detail below in combination with specific embodiments.
本发明首先进行地铁隧道偏压程度判断，通过最大主应力的偏转程度反映隧道偏压程度，定义最大主应力偏转角度为偏压系数，并计算得到地表沉降槽中心偏移距离；分析地铁施工中地表沉降因素，地表沉降槽的扭曲和偏位由偏压地形和偏压荷载的双重影响叠加，建立地表沉降计算模型；计算偏压地形影响，得到偏压地形影响下的地层任意点沉降规律；计算偏压荷载影响，得到偏压荷载影响下的地层任意点沉降规律；将偏压地形和偏压荷载作用结果叠加，代入地铁隧道相关参数，建立预测沉降曲线，预测地铁隧道地表沉降规律。The present invention first judges the bias degree of the subway tunnel, reflects the tunnel bias degree through the deflection degree of the maximum principal stress, defines the maximum principal stress deflection angle as the bias coefficient, and calculates the offset distance of the center of the surface settlement tank; analyzes the subway construction The surface subsidence factor, the distortion and displacement of the surface settlement trough are superimposed by the dual influence of the bias topography and the bias load, and the calculation model of the surface settlement is established; the influence of the bias topography is calculated, and the subsidence law of any point in the formation is obtained under the influence of the bias topography; Calculate the influence of bias load to obtain the settlement law of any point in the ground under the influence of bias load; superimpose the results of bias terrain and bias load, substitute into the relevant parameters of the subway tunnel, establish a predicted settlement curve, and predict the surface settlement law of the subway tunnel.
本发明从多种岩土性质、多种影响因素、多种变形尺度等多源信息入手，研究地铁隧道施工引起围岩变形和地表沉降的有限正则域二维弹性边值问题的精确解析解，建立地表沉降的多元预测模型，并综合多岩性、多因素、多尺度等特征，研究地表沉降的算法，以其实现工程中地表沉降的准确预测，为地铁隧道安全施工提供理论支持。The present invention starts with multi-source information such as various rock and soil properties, various influencing factors, and various deformation scales, and studies the accurate analytical solution of the two-dimensional elastic boundary value problem in the finite regular domain of the surrounding rock deformation and surface settlement caused by subway tunnel construction. Establish a multivariate prediction model of surface subsidence, and integrate multi-lithology, multi-factor, multi-scale and other characteristics to study the algorithm of surface subsidence, so as to realize accurate prediction of surface subsidence in engineering, and provide theoretical support for the safe construction of subway tunnels.
以上所述仅是对本发明的较佳实施方式而已，并非对本发明作任何形式上的限制，凡是依据本发明的技术实质对以上实施方式所做的任何简单修改，等同变化与修饰，均属于本发明技术方案的范围内。The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modifications made to the above embodiments according to the technical essence of the present invention, equivalent changes and modifications, all belong to this invention. within the scope of the technical solution of the invention.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112989591A (en) * | 2021-03-08 | 2021-06-18 | 北京交通大学 | Track deformation prediction method for frost heaving part of high-speed railway roadbed |
| CN113255037A (en) * | 2021-05-20 | 2021-08-13 | 中国建筑第五工程局有限公司 | Novel estimation method for upward floating amount of double-mode shield tunnel segment in upper soft and lower hard stratum |
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| CN104965994A (en) * | 2015-07-17 | 2015-10-07 | 青岛理工大学 | Method for measuring and estimating characteristic parameters of surface subsidence caused by subway tunnel construction |
| CN103310039B (en) * | 2013-05-22 | 2016-01-27 | 青岛理工大学 | Method for detecting influence of underground construction on ground building structure |
| CN106649912A (en) * | 2016-09-06 | 2017-05-10 | 中铁十六局集团北京轨道交通工程建设有限公司 | Settlement prediction method for metro tunnel shield undercrossing existing railway facilities |
| CN107153770A (en) * | 2017-05-16 | 2017-09-12 | 宁波市交通建设工程试验检测中心有限公司 | A kind of Forecasting Methodology of Unevenly-pressured shallow tunnel ground settlement deformation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310039B (en) * | 2013-05-22 | 2016-01-27 | 青岛理工大学 | Method for detecting influence of underground construction on ground building structure |
| CN104965994A (en) * | 2015-07-17 | 2015-10-07 | 青岛理工大学 | Method for measuring and estimating characteristic parameters of surface subsidence caused by subway tunnel construction |
| CN106649912A (en) * | 2016-09-06 | 2017-05-10 | 中铁十六局集团北京轨道交通工程建设有限公司 | Settlement prediction method for metro tunnel shield undercrossing existing railway facilities |
| CN107153770A (en) * | 2017-05-16 | 2017-09-12 | 宁波市交通建设工程试验检测中心有限公司 | A kind of Forecasting Methodology of Unevenly-pressured shallow tunnel ground settlement deformation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112989591A (en) * | 2021-03-08 | 2021-06-18 | 北京交通大学 | Track deformation prediction method for frost heaving part of high-speed railway roadbed |
| CN112989591B (en) * | 2021-03-08 | 2022-01-18 | 北京交通大学 | Track deformation prediction method for frost heaving part of high-speed railway roadbed |
| CN113255037A (en) * | 2021-05-20 | 2021-08-13 | 中国建筑第五工程局有限公司 | Novel estimation method for upward floating amount of double-mode shield tunnel segment in upper soft and lower hard stratum |
| CN113255037B (en) * | 2021-05-20 | 2022-10-21 | 中国建筑第五工程局有限公司 | Method for estimating floating amount of double-mode shield tunnel segment in upper-soft and lower-hard stratum |
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Application publication date: 20180928 |