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学者姓名：姚爱军
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Abstract ：
Underground engineering construction will inevitably change the stress state of surrounding strata, which will force a negative impact on the surrounding environment, even leading to the large deformation and damage of some adjacent structures. With a focus on the deformation of a typical soil-rock composite stratum site in the construction of Changchun Metro, relying on the shield construction of a parallel twin tunnel project between Northeast Normal University Station and Gong-Nong Square Station, which belongs to the Changchun Metro Line 1, the site deformation characteristics during the shield driving process of parallel twin tunnels were studied. Based on the data obtained from field monitoring and numerical simulation, ground settlement in shield driving was analyzed, the settlement trough was studied with the Peck formula, and the action of shield driving on the adjacent tunnel was discussed. Moreover, the influence range of shield driving was suggested, and the interaction between the twin tunnels with different axis spacings in shield driving was discussed. Some regular results obtained can provide support through data for similar projects in Changchun, China.
Keyword ：
shield tunneling shield tunneling soil-rock composite strata soil-rock composite strata site deformation characteristics site deformation characteristics
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| GB/T 7714 | Li, Liyun , Yao, Aijun . Investigation on Response of Site of Typical Soil-Rock Composite Strata in Changchun Induced by Shield Construction of Parallel Twin Tunnels [J]. | APPLIED SCIENCES-BASEL , 2024 , 14 (2) . |
| MLA | Li, Liyun 等. "Investigation on Response of Site of Typical Soil-Rock Composite Strata in Changchun Induced by Shield Construction of Parallel Twin Tunnels" . | APPLIED SCIENCES-BASEL 14 . 2 (2024) . |
| APA | Li, Liyun , Yao, Aijun . Investigation on Response of Site of Typical Soil-Rock Composite Strata in Changchun Induced by Shield Construction of Parallel Twin Tunnels . | APPLIED SCIENCES-BASEL , 2024 , 14 (2) . |
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Abstract ：
Evaluating groundwater inflow is greatly significant for ensuring the safety and economy during foundation pit dewatering with suspended waterproof curtains. However, there are limited applicable methods to predict the groundwater inflow of circle foundation pit with waterproof curtains in deep unconfined aquifers. In this study, based on Darcy's law and the continuity of water flow, the impact of suspended waterproof curtains on groundwater seepage was initially analyzed during circle foundation pit dewatering in deep unconfined aquifers. Furthermore, an analytical solution was proposed for groundwater inflow of circle foundation pit with suspended waterproof curtains in the unconfined aquifers. The effect of suspended waterproof curtains on seepage area, seepage direction, and seepage path were respectively considered by introducing the buried depth of waterproof curtain, the anisotropy coefficient, and the seepage path reduction coefficient. Finally, based on the self-conducted indoor seepage experiment and other cases (an indoor seepage experiment and two actual engineering projects), this proposed method was applied to conduct a comparative analysis with the existing methods. Results indicated that the proposed method can more reasonably evaluate the groundwater inflow of circle foundation pit with waterproof curtains in the unconfined aquifer, which can provide a better guidance for the groundwater inflow control in the practical dewatering projects.
Keyword ：
Foundation pit dewatering Foundation pit dewatering Unconfined aquifer Unconfined aquifer Groundwater inflow Groundwater inflow Suspended waterproof curtain Suspended waterproof curtain
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| GB/T 7714 | Guo, Yanchen , Zhang, Zhihong , Du, Changlong et al. An analytical solution for groundwater inflow of circle foundation pit with suspended waterproof curtains in the unconfined aquifer [J]. | ENVIRONMENTAL EARTH SCIENCES , 2024 , 83 (17) . |
| MLA | Guo, Yanchen et al. "An analytical solution for groundwater inflow of circle foundation pit with suspended waterproof curtains in the unconfined aquifer" . | ENVIRONMENTAL EARTH SCIENCES 83 . 17 (2024) . |
| APA | Guo, Yanchen , Zhang, Zhihong , Du, Changlong , Xue, Hongsong , Yao, Aijun , Liu, Xisheng et al. An analytical solution for groundwater inflow of circle foundation pit with suspended waterproof curtains in the unconfined aquifer . | ENVIRONMENTAL EARTH SCIENCES , 2024 , 83 (17) . |
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Abstract ：
In the context of increasing environmental awareness and the demand for sustainable construction practices, the use of recyclable materials in civil engineering projects has gained significant attention. This study focuses on the bearing characteristics and deformation behavior of recyclable steel-pipe piles during the excavation of foundation pits. Field experiments and numerical simulations were conducted to comprehensively analyze the stress characteristics and surface settlement patterns behind the piles. The results reveal critical insights into the interaction between the steel-pipe piles and the surrounding soil, providing a detailed understanding of the stress distribution and deformation mechanisms. An empirical method for calculating the surface settlement value, induced by foundation pit excavation under the support of steel-pipe slope protection piles, has been proposed. This method improves the accuracy of settlement predictions and enhances the reliability of foundation pit design.
Keyword ：
supporting structure supporting structure ground surface settlement ground surface settlement field test field test pile strain pile strain recoverable steel-pipe piles recoverable steel-pipe piles
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| GB/T 7714 | Lu, Jian , Li, Yanlin , Yao, Aijun . Bearing Characteristics and Ground Deformation Computation of Recyclable Steel-Pipe Piles during Pit Excavation [J]. | APPLIED SCIENCES-BASEL , 2024 , 14 (13) . |
| MLA | Lu, Jian et al. "Bearing Characteristics and Ground Deformation Computation of Recyclable Steel-Pipe Piles during Pit Excavation" . | APPLIED SCIENCES-BASEL 14 . 13 (2024) . |
| APA | Lu, Jian , Li, Yanlin , Yao, Aijun . Bearing Characteristics and Ground Deformation Computation of Recyclable Steel-Pipe Piles during Pit Excavation . | APPLIED SCIENCES-BASEL , 2024 , 14 (13) . |
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Abstract ：
In recent years, there has been a rise in the construction of expansive underground structures and shield tunnels with exceptionally large diameters. These projects introduce unique challenges regarding their impact on the surrounding soil and structures, which differ from those typically encountered in conventional shield tunnels. However, the existing body of research in this specific domain remains insufficient. When such tunnels intersect deep foundation pits supported by piled-raft foundations, the discrepancies in soil deformation can become even more pronounced. At present, there is a dearth of research on the underlying principles governing these differences, and theoretical investigations have not kept pace with practical engineering applications. Consequently, the existing settlement prediction methods employed for diverse projects need to be reevaluated and adjusted to accommodate the distinctive characteristics of each individual project. Regarding the engineering focus of this paper, it is crucial to recognize that soil subsidence in the pit bottom has a significant influence on the mechanical response of the piles. Consequently, the implementation of targeted correction measures remains consistently important. Based on this concept, this paper focuses on a super-large diameter shield tunnel project that under-crossed a deep foundation pit with a piled-raft foundation. The influence of different construction methods on the settlement law of the soil at the bottom of the deep foundation pit is discussed after verification of the accuracy of the model through numerical simulation and field monitoring data. Additionally, two correction coefficients that consider the project's load characteristics are proposed in this research. These coefficients were used to correct the surface settlement curve. The corrected soil settlement curve at the pit's bottom can successfully reflect the numerical simulation results, which in turn can reflect the mechanical response of the pile under the influence of tunnel excavation.
Keyword ：
piled-raft foundation piled-raft foundation engineering geology engineering geology deep foundation pit deep foundation pit ground subsidence prediction ground subsidence prediction super-large diameter shield tunnel super-large diameter shield tunnel
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| GB/T 7714 | Jiang, Yue , Li, Yanlin , Yao, Aijun et al. Soil Deformation Investigation of a Piled-Raft Foundation Pit Under-Crossed by a Super-Large Diameter Shield Tunnel [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (9) . |
| MLA | Jiang, Yue et al. "Soil Deformation Investigation of a Piled-Raft Foundation Pit Under-Crossed by a Super-Large Diameter Shield Tunnel" . | APPLIED SCIENCES-BASEL 13 . 9 (2023) . |
| APA | Jiang, Yue , Li, Yanlin , Yao, Aijun , Gao, Xiangzhi , Li, Hui . Soil Deformation Investigation of a Piled-Raft Foundation Pit Under-Crossed by a Super-Large Diameter Shield Tunnel . | APPLIED SCIENCES-BASEL , 2023 , 13 (9) . |
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Abstract ：
本发明公开了一种胀裂孔装药装置、地下结构破拆系统及方法，涉及地下工程和地下空间拓建、破拆施工技术领域，包括：胀裂药卷、安装杆和密封塞，胀裂药卷包括外包装袋和胀裂剂，外包装袋为封闭结构，胀裂剂填充与外包装袋内；安装杆的一端用于与外包装袋的一端固定连接以将胀裂药卷的一端导入胀裂孔内的底部，且安装杆能够将伸入到胀裂孔内底部的外包装袋的端部割开以使胀裂剂从外包装袋流入胀裂孔；密封塞用于对充满并压实胀裂剂的胀裂孔进行密封，结构简单、操作方便，能够带动胀裂药卷进入钻孔底部，有效的将胀裂孔填充满，避免外包装约束胀裂剂膨胀，有效提高破岩效果。
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| GB/T 7714 | 王炜 , 杨国华 , 周艳家 et al. 胀裂孔装药装置、地下结构破拆系统及方法 : CN202310629236.0[P]. | 2023-05-31 . |
| MLA | 王炜 et al. "胀裂孔装药装置、地下结构破拆系统及方法" : CN202310629236.0. | 2023-05-31 . |
| APA | 王炜 , 杨国华 , 周艳家 , 刘招伟 , 姚爱军 , 张锋 et al. 胀裂孔装药装置、地下结构破拆系统及方法 : CN202310629236.0. | 2023-05-31 . |
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Abstract ：
本发明公开了一种叠合盾构隧道支撑台车及其管节修正方法、支护方法，属于隧道工程技术领域，支撑台车包括台车本体，台车本体周向布设有若干对能够伸缩的支撑脚，台车本体上设有用于测量管节直径大小的测量装置。管节修正方法包括S1、测量管节初始洞径Dn；S2、监测支撑脚对应管节的变化洞径Dnt；S3、根据收敛值ΔDn进行修正。支护方法包括S1、下行隧道内预设初始管节支护数量并布设支撑台车；S2、盾构行进至末端的支撑台车管节末端上方时暂停开挖，所有支撑台车移动一个管节；S4、盾构再次暂停开挖时，所有支撑台车再次移动一个管节；S5、重复步骤S4步骤，直至上行隧道完成开挖。既能够有效对下行隧道进行支撑，而且能够对变形管节进行修正。
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| GB/T 7714 | 王炜 , 周艳家 , 刘招伟 et al. 叠合盾构隧道支撑台车及其管节修正方法、支护方法 : CN202310252982.2[P]. | 2023-03-07 . |
| MLA | 王炜 et al. "叠合盾构隧道支撑台车及其管节修正方法、支护方法" : CN202310252982.2. | 2023-03-07 . |
| APA | 王炜 , 周艳家 , 刘招伟 , 姚爱军 , 杨国华 , 刘啸辰 et al. 叠合盾构隧道支撑台车及其管节修正方法、支护方法 : CN202310252982.2. | 2023-03-07 . |
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Abstract ：
Damage to underground structures induced by soil liquefaction under cyclic loads such as earthquakes has long been an important issue in underground engineering practice. In this paper, five models are developed using Flac3D software to analyze the effect of burial depth on the force, deformation characteristics, and uplift behavior of utility tunnels in the non-homogeneous site containing a liquefied layer. The cyclic shear property of saturated sand and the increase in pore water pressure during the earthquake are modeled using a cyclic load-volume strain increment model, using Shell-Type structural elements to model underground utility tunnels, and by using plastic hinges to represent the bending moment capacity of member's joints. Numerical results show that for shallow-buried utility tunnels, increasing the burial depth increases the bending moment, shear force, and deformation of the structure while significantly reducing its uplift. Therefore, for high-strength shallow-buried utility tunnels, appropriate increase in burial depth can improve its seismic safety.
Keyword ：
seismic response seismic response utility tunnel utility tunnel finite-difference finite-difference liquefaction liquefaction non-homogeneous liquefiable soil non-homogeneous liquefiable soil
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| GB/T 7714 | Tian, Tian , Yao, Aijun , Li, Yanlin et al. Seismic Response of Utility Tunnels with Different Burial Depths at the Non-Homogeneous Liquefiable Site [J]. | APPLIED SCIENCES-BASEL , 2022 , 12 (22) . |
| MLA | Tian, Tian et al. "Seismic Response of Utility Tunnels with Different Burial Depths at the Non-Homogeneous Liquefiable Site" . | APPLIED SCIENCES-BASEL 12 . 22 (2022) . |
| APA | Tian, Tian , Yao, Aijun , Li, Yanlin , Gong, Yifei . Seismic Response of Utility Tunnels with Different Burial Depths at the Non-Homogeneous Liquefiable Site . | APPLIED SCIENCES-BASEL , 2022 , 12 (22) . |
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Abstract ：
本发明公开了一种基于离散元与合成岩体技术的岩质边坡建模方法，首先，现场采集裂隙数据，求取裂隙分布函数；现场采集岩块与含裂隙岩块样本进行室内力学试验得到岩块与裂隙的力学参数；利用边坡剖面建立离散元边坡模型；利用裂隙分布函数构建边坡离散裂隙网络模型DFN，将离散元边坡模型与裂隙网络模型组合；最后模拟与实验室相同的力学试验，对照宏观力学参数对颗粒间的接触的细观参数进行标定，将标定结果用到组合模型中，裂隙岩体边坡模型建模完成。本发明充分考虑到裂隙的离散性与裂隙岩体的力学特性，真实反映现实中裂隙的空间分布特征，模型可用于边坡稳定性分析及滑坡运动过程反演等问题时，结果较现有技术真实可靠。
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| GB/T 7714 | 李严严 , 王瑞 , 姚爱军 et al. 一种基于离散元与合成岩体技术的岩质边坡建模方法 : CN202210239825.3[P]. | 2022-03-12 . |
| MLA | 李严严 et al. "一种基于离散元与合成岩体技术的岩质边坡建模方法" : CN202210239825.3. | 2022-03-12 . |
| APA | 李严严 , 王瑞 , 姚爱军 , 张志红 , 张乐 . 一种基于离散元与合成岩体技术的岩质边坡建模方法 : CN202210239825.3. | 2022-03-12 . |
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Abstract ：
本发明公开了一种崖下公路桥墩防崩落结构及构筑方法，该结构包括二元型土石垫层消能槽与牛轭式防护挡墙结构两个部分，采用先消能后拦导的组合防护模式对存在风险的桥墩进行有效防护，针对落石频发山区公路桥墩的防冲击和损伤，对于落石先消减其重力势能，然后再进行阻拦和引导，改变其崩落的方向和位置，最大程度减小落石对桥墩的影响，保证公路桥梁的安全运营。本设计能够对桥墩进行有效防护，保障山区公路桥梁的安全运营，一次施工完成后能够对桥墩实现终身维护，有效节约维护成本。对比现有技术具有防护范围广，防撞击能力强，使用寿命长的优点。
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| GB/T 7714 | 姚爱军 , 龚逸非 , 李彦霖 et al. 一种崖下公路桥墩防崩落结构及构筑方法 : CN202211401447.0[P]. | 2022-11-09 . |
| MLA | 姚爱军 et al. "一种崖下公路桥墩防崩落结构及构筑方法" : CN202211401447.0. | 2022-11-09 . |
| APA | 姚爱军 , 龚逸非 , 李彦霖 , 李慧 . 一种崖下公路桥墩防崩落结构及构筑方法 : CN202211401447.0. | 2022-11-09 . |
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Abstract ：
This study mainly investigated the variation law and mechanical mechanism of surrounding earth pressure and deformation of an existing tunnel, caused by dewatering, foundation excavation, building loading, and groundwater recovery. According to different dewatering schemes, two modes were established: nonisolated dewatering unloading-loading mode and isolated dewatering unloading-loading mode. Through large-scale similar materials model test, the variation law of deformation and surrounding earth pressure of adjacent tunnel under complex unloading-loading conditions was preliminarily revealed. Based on the size of the prototype project, the test results were further verified by the numerical simulation. The mechanical mechanism of tunnel deformation in different construction stages was analyzed after the comparative study. The results show that the tunnel structure deformation, vertical and horizontal displacement, and torsion occur in the process of building construction. In the nonisolated dewatering unloading-loading mode, the decrease or rise of the groundwater level significantly reduces (maximum 27.85%) or increases (maximum 35.19%) the surrounding earth pressure of the tunnel. The decrease or increase of the horizontal total stress was much greater than that of the vertical total stress, which leads to the deformation of tunnel structure. The vertical displacement of the tunnel is generally settlement, which mainly occurs in the stage of dewatering and building loading, accounting for 83.21%100.00% and 25.11%-40.34% of the total settlement, respectively. In the stage of foundation pit excavation and groundwater recovery, the tunnel rises. In the horizontal direction, the tunnel moves towards the foundation pit, mainly in the excavation stage, accounting for 82.77%-86.30% of the maximum value. Due to the uneven change of displacement field and stress field of soil outside the foundation pit, the tunnel torsion occurs. In the isolated dewatering unloading-Loading mode, the change of groundwater has little effect on the tunnel. In the stage of excavation and construction load, the variation law of tunnel surrounding earth pressure and deformation is similar in the two modes.
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| GB/T 7714 | Guo, Haifeng , Ma, Dong , Yao, Aijun . Deformation Responses and Mechanical Mechanism of Existing Tunnel due to New Building Construction [J]. | ADVANCES IN CIVIL ENGINEERING , 2021 , 2021 . |
| MLA | Guo, Haifeng et al. "Deformation Responses and Mechanical Mechanism of Existing Tunnel due to New Building Construction" . | ADVANCES IN CIVIL ENGINEERING 2021 (2021) . |
| APA | Guo, Haifeng , Ma, Dong , Yao, Aijun . Deformation Responses and Mechanical Mechanism of Existing Tunnel due to New Building Construction . | ADVANCES IN CIVIL ENGINEERING , 2021 , 2021 . |
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