Study on Seismic Response and Vibration Reduction of Shield Tunnel Lining in Coastal Areas
Round 1
Reviewer 1 Report
The paper presents a study on seismic response and vibration reduction of shield tunnel lining in coastal areas. It is well written and it is significant from a scientific point of view.
Minor comments:
Maybe in the introduction you can discuss the effect of the record to record variability on your analysis: for example see:
Jalayer, F., Ebrahimian, H., Miano, A., Manfredi, G., & Sezen, H. (2017). Analytical fragility assessment using unscaled ground motion records. Earthquake Engineering & Structural Dynamics, 46(15), 2639-2663.
Please better describe the nonlinear model foundation of surrounding rock and soil mass, by entering deeply in the assumptions done.
The axis and the vertical values of Figure 8 can be improved to have a better readibility.
Same comment for Figure 9.
Author Response
Dear reviewer,
Thanks very much for taking your time to review this manuscript. I really appreciate all your comments and suggestions! We have read through comments carefully and have made corrections. Based on the instructions provided in your letter, we uploaded the file of the revised manuscript. Revisions in the text are shown using red highlight for additions, and strikethrough font for deletions.
Point 1: In the introduction can discuss the effect of the record to record variability on your analysis: for example see: Jalayer, F., Ebrahimian, H., Miano, A., Manfredi, G., & Sezen, H. (2017). Analytical fragility assessment using unscaled ground motion records. Earthquake Engineering & Structural Dynamics,46(15), 2639-2663.
Response 1: Thanks for your comments. In the 85-88 sentences of the introduction, we discussed the impact of records on the analysis, and thought that the analysis of carefully selected records would be more reasonable and effective. When selecting seismic wave data, we should also follow the principle of selecting a relatively large dispersion of seismic intensity, and therefore cited this article.
Point 2: Suggest better describe the nonlinear model foundation of surrounding rock and soil mass, by entering deeply in the assumptions done.
Response 2: Thanks for your review very much. This paper is based on the background of Dalian Metro. The finite element model is used for modeling. The specific boundary conditions of the modeling are based on the actual situation of Dalian Metro and the boundary conditions of surrounding rock and soil set in the article "Research on the Deformation Law of Surrounding Rock in the Construction of Shield Tunnel Undercrossing the Existing Line". We have made corresponding marks in the quoted place.
Point 3: The axis and the vertical values of Figure 8 and Figure 9 can be improved to have a better readability.
Response 3: Thanks for your review. We adjusted the maximum value and minimum value of the ordinate to make the extreme value more accurate, and adjusted the scale value of the ordinate to make it more precise, so that the values of each point can be seen more clearly.
We would love to thank you for allowing us to resubmit a revised copy of the manuscript and we highly appreciate your time and consideration.
Sincerely
Sihui Dong, Xinyu Zhang, Chenxu Jia, Shiqun Li, Kang Wang
Reviewer 2 Report
In spite of the paper is interesting, a discussion that justifies the publication on Sustainability is missing. In details, I believe that the main topics that a journal as Sustainability wants to deal with are not treated. So, I suggest a revision of the paper aimed to stress the sustainability issues.
Author Response
Dear reviewer,
Thank you for your precious comments and advice. Those comments are all valuable and very helpful for revising and improving our paper. We have revised the manuscript accordingly，and our point-by-point responses are presented.
Point 1:In spite of the paper is interesting, a discussion that justifies the publication on Sustainability is missing. In details, I believe that the main topics that a journal as Sustainability wants to deal with are not treated. So, I suggest a revision of the paper aimed to stress the sustainability issues.
Response 1: Thank you for your comments very much. In the 377-381 sentences of the manuscript, we mainly reflect the sustainability from the aspect of isolation materials. Through inquiry, we found that the unit price of rubber is much higher than that of foam concrete. Through analysis, the foam concrete finally selected is not only environmentally friendly and convenient for construction, but also has excellent performance in all aspects, which is more suitable for local soil conditions, safer and has a longer service life.
Thank you for your careful review. We really appreciate your efforts in reviewing our manuscript during this unprecedented and challenging time. We wish good health to you, your family, and community. Your careful review has helped to make our study clearer and more comprehensive.
Sincerely
Sihui Dong, Xinyu Zhang, Chenxu Jia, Shiqun Li, Kang Wang
Reviewer 3 Report
The authors developed a numerical simulation of the Dalian Metro Tunnel in this research. Particularly, a nonlinear soil model was considered. They apply the Drucker-Prager model, which is a multiple-yield surface model.
I recommend improving the writing of sentence 241, particularly the way in which the values of the damping ratio are included.
In summary, the manuscript describes the primary steps applied to identify the seismic behavior of the tunnel without seismic damping and with seismic damping (rubber and foam concrete). The document also describes in detail the main graphical and numerical results obtained. Therefore, this manuscript is appropriate to be published.
Author Response
Dear reviewer,
Thanks very much for taking your time to review this manuscript. We really appreciate all your generous comments and suggestions! According to your advice, we amended the relevant part in manuscript. All of your questions were answered.
Point 1:I recommend improving the writing of sentence 241, particularly the way in which the values of the damping ratio are included.
Response 1: Thank you for your comments very much. We have modified Table 3. The specific damping coefficient calculation method can be seen in the 123 to 130 sentences. The application formula can be seen in the 4 to 6 formulas. The modified table can more clearly see the damping coefficient applied in the analysis process of this paper. See the manuscript for specific modification of the figure.
Thank you very much for your time and effort on the manuscript. I wish you and your family good health and smooth work! Thank you again for your efforts to make our manuscript more detailed and complete.
Sincerely
Sihui Dong, Xinyu Zhang, Chenxu Jia, Shiqun Li, Kang Wang
Round 2
Reviewer 2 Report
The authors have not improved the paper as suggested. The paper remains not proper for a journal as Sustainability but surely adequate for other journals specifically treating the theme faced in the paper.
Author Response
Dear reviewer,
Thanks for your careful review.
Point 1: The authors have not improved the paper as suggested. The paper remains not proper for a journal as Sustainability but surely adequate for other journals specifically treating the theme faced in the paper.
Response 1: Sustainability is an interdisciplinary comprehensive journal covering a wide range of topics such as human environment, culture, economy and society. The research background of our paper is strongly related to the following topics. We can find it in the following links:
https://www.mdpi.com/topics/Natural_Hazards_Disaster_Risks_Reduction
https://www.mdpi.com/topics/Geology
https://www.mdpi.com/topics/intelligent_construction
As an important traffic structure to improve the technical state of the highway, shorten the driving distance, improve the transportation capacity and reduce the occurrence of accidents, the tunnel can not only shorten the driving distance, improve the driving efficiency and safety, but also protect the natural environment and improve the utilization of underground engineering space, which is an important means for the sustainable development of the city in the future. This paper studies the seismic response of tunnel lining structure, and hopes to put forward appropriate damping measures through simulation to reduce the losses caused by earthquake, so as to promote the safety, coordination and sustainable development of urban underground structures. Wu, YY and others published articles on the impact of earthquakes on traffic conditions in the journal Sustainability 2022, Volume 14, Issue 18 [1], and Park, S and others published articles on the changes in slope stability caused by earthquakes in the journal Sustainability 2018, Volume 10, Issue 10 [2]. On the basis of previous studies, this paper further expounds the impact of earthquake on underground structures, and simulates the seismic mitigation measures, which provides a basis for the seismic research of underground structures. This is explained in line 30 to line 35 of the revised manuscript.
[1] Wu Yingying,Xu Zhen,Liang Chenxi,Song Ruizhuo. Post-Earthquake Traffic Simulation Considering Road Traversability[J]. Sustainability,2022,14(18).
[2] Park Sangki,Kim Wooseok,Lee Jonghyun,Baek Yong. Case Study on Slope Stability Changes Caused by Earthquakes—Focusing on Gyeongju 5.8 ML EQ[J]. Sustainability,2018,10(10).
We would love to thank you for allowing us to resubmit a revised copy of the manuscript and we highly appreciate your time and consideration.
Yours sincerely
Sihui Dong, Xinyu Zhang, Chenxu Jia, Shiqun Li, Kang Wang
Author Response File: 
Author Response.docx
Round 3
Reviewer 2 Report
I feel the paper is sufficient to be published
