Study on the Force Transfer Process of Bolt–Slurry Interface of Full-Length Bonding Anchor System at Earthen Sites
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThe force transfer process at the bolt-slurry interface in full-length bonding anchor systems was studied by the authors for use in earthen sites. It is accordingly established that this interface obeys a bilinear bond-slip model, and the process can be divided into four stages for the bond-slip. The authors obtained analytical solutions for various parameters, which are calibrated with pull-out test results, and give an analysis of anchoring parameters with regard to their effects on force and deformation performance of the system. The paper does not have enough quality for publication.
The abstract mentions parameter derivation and calibration, however a brief of some major findings related to how theoretical predictions are at par or matching with the experimental results may prove useful.
The abstract may briefly indicate how the results of the study could be put into practice or applied; more specifically, they may have an impact on the anchorage system design or its maintenance in earthen sites.
Please enlighten briefly regarding the importance of investigation of the FLBAS at earthen sites, with particular emphasis on why debonding and sliding of the bolt-slurry interface are critical.
Although the introduction does mention past research and challenges, it does not clearly mention which part of knowledge is lacking, with this study intending to fulfill it. It should more explicitly point out what is unknown or insufficiently understood about the bolt-slurry interface in earthen sites and why the study needs to be done.
The authors presented already known models without any improvement or novelty.
The conclusion should succinctly restate the major contributions of the study, highlighting its novelty and importance. This enables readers to quickly appreciate the bearing of the findings.
While some practical implications are suggested, the broader implications of the findings, with respect to the conclusions, would be clearer—for example, how they may influence any future research or engineering practice or earthen site conservation efforts.
The author does not discuss any limitations of the study.
Author Response
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Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsThis manuscript presents a theoretical analysis of the force transfer process at the bolt-slurry interface in full-length bonding anchor systems used to reinforce earthen cultural heritage sites. The authors propose a bilinear bond-slip model, derive analytical solutions for different stages of the anchoring process, and validate their model against experimental results. They also analyze the effects of key parameters like bonding length and bolt stiffness on system performance. The study provides insights into optimizing anchor design for earthen site reinforcement while minimizing intervention.
Some of key aspects of the study include:
- Proposes a bilinear bond-slip model for the bolt-slurry interface
- Divides the anchoring process into four stages: elastic, elastic-softening, elastic-softening-loosening, and softening-loosening
- Derives analytical solutions for interface stresses, slippage, and bolt strain in each stage
- Validates model predictions against experimental pull-out test results
I envision the main strength of the study is its potential practical implications.
Having that said, these are my specific comments:
Limited experimental validation which can be enhanced by incorporating more extensive cross-examination of the results versus available experimental studies.
The bilinear model assumption as the cornerstone of the proposed models has some limitations which should be explored with more details.
I suggest authors comparing the proposed approach to alternative modeling approaches
Derived differential equations and their solutions describing mainly bond-slip behavior is extensively studied previously by many researchers, which reviewing them alongside the proposed relationships is highly recommended, including seminal work of Gupta and Maestrini, among others (https://doi.org/10.1061/(ASCE)0733-9445(1990)116:3(769)).
I recommend expanding on how findings could be applied in real-world reinforcement projects
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
Comments and Suggestions for AuthorsReviewer's comments on the paper titled “Study on the force transfer process of bolt-slurry interface of full-length bonding anchor system in earthen sites” for the MDPI Journal Coatings (Manuscript coatings-3169529)
The paper titled “ Study on the force transfer process of bolt-slurry interface of full-length bonding anchor system in earthen sites” is an original contribution, which presence a certain interest for the MDPI Journal Coatings. A quantitative study of the force transfer process of the anchorage interface of full-length bonding anchor system in earthen sites was carried out. It was stated, that the proper increase of the bonding length of the anchoring system can realize the ultimate anchoring force and increase the limit slip amount of the bolt, and enhance the ductility of the anchoring system under the condition that the bonding length of the anchoring system is greater than the effective bonding length. Proper increase of bolt diameter and elastic modulus can improve the ultimate anchoring force, but reduce the ductility of the anchoring system at the same time.
The following supplements/modifications should be done to made the current paper more clear for understanding.
1. Abstract of the paper should be completed by the major numerical results obtained in course of the current study.
2. The words combinations "earthen sites", " bolt-slurry interface" and "force transfer process" should be deleted from the list of keywords so as just are included in the title of the paper.
3. Chapter 2. "Ideal force analysis model for bond-slip at the anchorage interface" should be completed by the references on the state standards related to the considered model.
4. Designations for the Figures 2 and 3 should be completed by the explanations of all the values, shown on the current figures.
5. All the values included in to the formulas 1) - 24), should be adequately explained in the text of the paper.
6. "Distance from loading", mentioned on the Figure 7, should be explained in the text and illustrated by the corresponding figure.
7. Chapter 5 "Conclusions" should be supplied by the numerical results obtained in course of the current study and necessary to clearing the main conclusions were done. Diameter of the bolt and it elastic modulus, mentioned in the point (4), also should be explained numerically in the text of the chapter.
8. List of references should be seriously expanded by the newest investigations in the current field. Sources nr. 6 and 7 can be replaced by the newest ones so as are published more then twenty years ago. Absence of the state standards in the list of references also should be mentioned as a negative moment.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Comments and Suggestions for AuthorsThe paper can be accepted now
Reviewer 2 Report
Comments and Suggestions for AuthorsI think authors have implemented my comments and I can recommend their paper for publication.
Reviewer 3 Report
Comments and Suggestions for AuthorsRepeated reviewer's comments on the paper titled “Study on the force transfer process of bolt-slurry interface of full-length bonding anchor system in earthen sites” for the MDPI Journal Coatings (Manuscript coatings-3169529)
The paper titled “ Study on the force transfer process of bolt-slurry interface of full-length bonding anchor system in earthen sites” was significantly improved in accordance with the reviewer's comments after the first round of the reviewing. All the comments were addressed.
