基于NNBR模型的隧道盾构施工地表沉降实测与计算分析

doi:10.13229/j.cnki.jdxbgxb20190887

Abstract

Abstract:

In order to improve the accuracy of settlement calculation of tunnel shield construction， a method for measuring and calculating ground settlement of tunnel shield based on NNBR model is proposed. Taking the Wangjing tunnel shield section to the airport Sanyuanqiao~T3 section as the research area， the general situation of the research object was analyzed， the engineering data are investigated， the relevant actual data are obtained and the corresponding analysis is made. Based on the measured data， combined with the NNBR model（Nearest Neighbor Bootstrapping Regressive Model）， the basic principle of generating similar results based on similar reasons is that the most similar one is detected in the historical sample set， or several samples are used as calculation results to obtain the final tunnel shield construction surface. It is verified that the calculated method has small relative error and is feasible， the talent method improves the accuracy of engineering survey and provides a theoretical basis for future research and development.

Key words: civil engineering, NNBR model, tunnel shield, surface settlement

CLC Number:

U456

Liu LIU,Wei-xing FENG. Field measurement and calculation analysis of tunnel shield tunnel construction based on NNBR model[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(1): 245-251.

Figures/Tables 4

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Table 1

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类型	地下水位稳定水位		含水层
类型	水位埋深/m	水位高程/m	含水层
上层滞水	1.10~3.80	31.31~33.54	粉土
潜水	6.10~7.90	26.75~28.55	粉土和砂土
潜水	10.50~15.00	19.54~22.24	砂土
层间水	20.30~25.50	9.14~13.71	砂土
层间水	29.20~31.90	2.75~6.23	砂土

Field measurement and calculation analysis of tunnel shield tunnel construction based on NNBR model

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