Analysis of Collapse Mechanism and Treatment Evaluation of a Deeply Buried Hard Rock Tunnel
Round 1
Reviewer 1 Report
Line 89-91. Monitoring activities to estimate possible conditions of collapse should addressed not only to geological measurements but also to structural ones. Recent articles on Remote Sensing furnish possible strategies useful fot tuneel cases, please enforce references with [1] [2] [3].
[1] Peng Liu, Liping Di, Qian Du and Lizhe Wang, Remote Sensing Big Data: Theory, Methods and Applications, Remote Sensing, MDPI, 2018, 10, 711.
[2] Fausto Mistretta, Giannina Sanna, Flavio Stochino and Giuseppina Vacca, Structure from Motion Point Clouds for Structural Monitoring, Remote Sensing, MDPI, 2019, 11, 1940.
[3] Ding, Z.; Liao, X.; Su, F.; Fu, D. Mining Coastal Land Use Sequential Pattern and Its Land Use Associations Based on Association Rule Mining. Remote Sensing, MDPI, 2017, 9, 116.
Lines 283-285. Please briefly describe instruments for geometrical monitoring activity.
Lines 307-315. Please briefly describe strategy and instruments for pressure monitoring activity.
Author Response
Dear reviewer,
We would like to thank you for the careful and constructive reviews. Based on the comments from the reviewer, we have made the changes of the manuscript, which are detailed below,
Point 1: Line 89-91. Monitoring activities to estimate possible conditions of collapse should addressed not only to geological measurements but also to structural ones. Recent articles on Remote Sensing furnish possible strategies useful for tunnel cases, please enforce references with [1] [2] [3].
Response 1: Thank you for your careful reading and kind suggestions. We have added related references which are marked in red in the manuscript.
Point 2: Lines 283-285. Please briefly describe instruments for geometrical monitoring activity.
Response 2: Thank you very much for your advice. We have made a brief description of the geometry monitoring instrument and marked it in red in the text.
Point 3: Lines 307-315. Please briefly describe strategy and instruments for pressure monitoring activity.
Response 3: Thank you very much for your comment. We have described the strategy and instruments of the pressure monitoring activities and marked them in red.
We appreciate the comments from the reviewer. Thank you for reviewing our manuscript.
Sincerely,
Cai Zi Yong
Author Response File: 
Author Response.docx
Reviewer 2 Report
Interesting study.
- Introduction is well written. Please consider adding some literature on vector methods which is adopted for the analysis later in the manuscript.
- Consider merging Fig 2,3, and 4 into one Figure.
- In the Methodology section (Section 3), consider adding one sub-section on the vector mechanism which is used for analysis. It seems like it appears suddenly at page 7 without any prior background.
- Fault F1, plane P1 and P2: consider adding one image to illustrate the explanation like Figure 7. Hard to follow what is F1, P1, P2 without any illustration
- References is mentioned twice: Line 342
Author Response
Dear reviewer,
We would like to thank you for the careful and constructive reviews. Based on the comments from the reviewer, we have made the changes of the manuscript, which are detailed below,
Point 1: Please consider adding some literature on vector methods which is adopted for the analysis later in the manuscript.
Response 1: Thank you for this comment. We have added relevant references according to your comments and marked them in red in the manuscript.
Point 2: Consider merging Fig 2,3, and 4 into one Figure.
Response 2: Thank you very much for your valuable guidance. We have adjusted and merged the pictures according to your suggestions, which are marked red in the main text.
Point 3: In the Methodology section (Section 3), consider adding one sub-section on the vector mechanism which is used for analysis. It seems like it appears suddenly at page 7 without any prior background.
Response 3: Thank you very much for your valuable guidance. In the Methodology section the direction parameter matrix is calculated based on the normal and edge vector of each structural plane. We have explained the calculation process of vector mechanism method and marked it in red in the manuscript.
Point 4: Fault F1, plane P1 and P2: consider adding one image to illustrate the explanation like Figure 7. Hard to follow what is F1, P1, P2 without any illustration.
Response 4: Thank you very much for your advice. We have shown the occurrence and location of fault F1, structural plane P1 and P2, which are marked red in the main text.
Point 5: References is mentioned twice: Line 342.
Response 5: Thank you for your valuable guidance. Some format problems have been revised, and other contents have been carefully proofread. which are marked red in the main text.
We appreciate the comments from the reviewer. Thank you for reviewing our manuscript.
Sincerely,
Cai Zi Yong
Author Response File: Author Response.docx
Reviewer 3 Report
The theme chosen by the authors seems relevant. Article materials are valuable and will be in demand in practice. The authors demonstrated excellent knowledge of the problems of rock collapse during tunneling. Their experience is valuable for practical use. The article may be recommended for publication. Article requires minor corrections.
- There are different parameters for evaluating rock integrity coefficient. What is the integrity coefficient used by the authors in clause 3.2?
- For a better understanding of the causes of the collapse described in section 3.4, it is desirable to provide figures explaining the location and orientation of fault F1 and structural planes P1, P2 additionally or directly to fig. 5.
- The mathematical formulas given in clauses 3.4.1 and 3.4.2 would be easier to perceive if they were provided with illustrations. Authors should consider how to illustrate the calculations in this section for a better understanding of the material. This would make it possible to evaluate the presented reasoning in close proximity to the problem under discussion.
- When describing the results of monitoring deformations and stresses in paragraph 5, a brief description and the errors of the instruments used for measurement should be given.
- A long sentence is in abstract.
Author Response
Dear reviewer,
We would like to thank you for the careful and constructive reviews. Based on the comments from the reviewer, we have made the changes of the manuscript, which are detailed below,
Point 1: There are different parameters for evaluating rock integrity coefficient. What is the integrity coefficient used by the authors in clause 3.2?
Response 1: Thank you for this comment. The integrity coefficient of rock is 0.64 marked in red in the manuscript.
Point 2: For a better understanding of the causes of the collapse described in section 3.4, it is desirable to provide figures explaining the location and orientation of fault F1 and structural planes P1, P2 additionally or directly to Fig. 5.
Response 2: Thank you very much for your advice. We have shown the occurrence and location of fault F1, structural plane P1 and P2, which are marked red in the main text.
Point 3: The mathematical formulas given in clauses 3.4.1 and 3.4.2 would be easier to perceive if they were provided with illustrations. Authors should consider how to illustrate the calculations in this section for a better understanding of the material. This would make it possible to evaluate the presented reasoning in close proximity to the problem under discussion.
Response 3: Thank you very much for your valuable guidance. We have given the relevant analysis illustrations in sections 3.4.1 and 3.4.2 and marked them in red in the manuscript.
Point 4: When describing the results of monitoring deformations and stresses in paragraph 5, a brief description and the errors of the instruments used for measurement should be given.
Response 4: Thank you very much for your valuable guidance. The deformation monitoring is carried out by sticking reflectors on the measuring points and using ZT30 total station, with the measurement accuracy of 2mm + 2ppm. The surrounding rock pressure monitoring is carried out by using BK-1206S vibrating string double-mode pressure box to read the data through the pressure intelligent acquisition instrument, with the maximum range of 0.6MPa and the measurement error of 0.001 MPa. The modifications are marked in red in the manuscript.
Point 5: A long sentence is in abstract.
Response 5: Thank you very much for your valuable guidance. Some of the long sentence in the abstract and body of the manuscript have been modified and marked in red.
We appreciate the comments from the reviewer. Thank you for reviewing our manuscript.
Sincerely,
Cai Zi Yong
Author Response File: Author Response.docx
