Soil Mechanics and Foundation Engineering最新文献

Strength Degradation of Fractured Sandstone After Thawing of an Inclined Shaft Produced by Artificial Freezing 人工冻结斜井解冻后断裂砂岩的强度退化

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-08-01 DOI: 10.1007/s11204-024-09974-8

Mengchen Yun, Jianxi Ren, Yi Xie, Yichen Zhang, Liang Zhang

{"title":"Strength Degradation of Fractured Sandstone After Thawing of an Inclined Shaft Produced by Artificial Freezing","authors":"Mengchen Yun, Jianxi Ren, Yi Xie, Yichen Zhang, Liang Zhang","doi":"10.1007/s11204-024-09974-8","DOIUrl":"https://doi.org/10.1007/s11204-024-09974-8","url":null,"abstract":"Similar materials were used to make quasi-sandstone with parallel double fractures, and the process of freezing inclined shaft construction was reproduced through indoor freeze–thaw tests. The basic physical parameters of double fractured quasi-sandstone before and after thawing were measured, and indoor triaxial compression tests of double fractured quasi-sandstone with different dip angles after thawing were carried out. The influence of fracture dip angle on the mechanical properties and failure characteristics of the quasi-sandstone was analyzed. The results show the following. The double fractured quasi-sandstone had strong water absorption, and there were different degrees of freeze–thaw damage. Under triaxial compression, with the increase of fracture dip angle, the peak strength of the quasi-sandstone first increased and then decreased, and it was the minimum when the fracture dip angle was 30°. The energy evolution law was similar for different crack dip angles. In the elastic stage, the growth rate of elastic energy was greater than that of dissipated energy, whereas in the plastic stage, the dissipated energy gradually increased and exceeded the elastic performance. When the crack dip angle was 90°, the increase in the growth rate of dissipated energy was most significant. In addition, there were three main failure modes of quasi-sandstone under triaxial loading: when the dip angle of the fracture was 0°, wing crack propagation occurred in the rock, causing rock bridge failure. When the fracture dip angle was 30° or 60°, the rock was sheared. When the fracture dip angle was 90°, the rock was tensioned.","PeriodicalId":21918,"journal":{"name":"Soil Mechanics and Foundation Engineering","volume":"53 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141866605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Analysis of Pullout Bearing Capacity of End-Bearing Torpedo Anchors 端承鱼雷锚拉出承载能力的数值分析

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-31 DOI: 10.1007/s11204-024-09972-w

Gang Li, Jinli Zhang, Jia Liu, Jinhang You

{"title":"Numerical Analysis of Pullout Bearing Capacity of End-Bearing Torpedo Anchors","authors":"Gang Li, Jinli Zhang, Jia Liu, Jinhang You","doi":"10.1007/s11204-024-09972-w","DOIUrl":"https://doi.org/10.1007/s11204-024-09972-w","url":null,"abstract":"Owing to the advantages of easy installation, low cost, and high bearing capacity (P), torpedo anchors (TAs) are suitable for anchoring the floating platforms used in deep-sea oil exploitation. This study investigated the P of conventional and end-bearing TAs in saturated, normally consolidated soils based on a numerical calculation using the ABAQUS software. According to numerical calculations with different parameter values, the effects of factors such as the location, area (S), embedment depth (h), and pullout angle (α) of the bearing plates on P were investigated. Based on the numerical calculation results, vertical (V)–horizontal (H) envelopes for the P of TAs were established. The results reveal that the P of a conventional TA under vertical pullout loading between numerical calculation and American Petroleum Institute (API) standard exist a difference of only 3%, which confirms the reliability of the numerical model. The P of the end-bearing TAs was significantly higher than that of conventional TAs, and the TA equipped with bearing plates at the bottom had a relatively high P, which increased significantly as S and h increased. When S exceeded a certain value, P increased with α. An increase in S resulted in an increase in the envelope coefficient A and a decrease in the envelope coefficient B, and caused the envelope to protrude outward. Establishing V–H envelopes has a certain reference value for estimating the P of TAs in actual engineering.","PeriodicalId":21918,"journal":{"name":"Soil Mechanics and Foundation Engineering","volume":"74 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141866600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Permeability Characteristics of Sedimentary Fine Tailings Including the Degree of Compaction 沉积细尾矿的渗透性特征（包括压实度

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-31 DOI: 10.1007/s11204-024-09969-5

Xi Yang, Deqing Gan

{"title":"Permeability Characteristics of Sedimentary Fine Tailings Including the Degree of Compaction","authors":"Xi Yang, Deqing Gan","doi":"10.1007/s11204-024-09969-5","DOIUrl":"https://doi.org/10.1007/s11204-024-09969-5","url":null,"abstract":"Tailings dam accidents can result in serious casualties and environmental problems. Therefore, it is necessary to analyze the factors affecting the safety of tailings dams. In this paper, the permeability characteristics of sedimentary fine tailings, including the degree of compaction, and the seepage failure of tailings dams are explored. The results indicate that the permeability coefficient gradually decreases with increasing fine-particle content. There is a threshold associated with the fine-particle content at which the trend in the coefficient changes. The fine-particle content at this threshold is 35% for particles finer than 0.075 mm and 15% and 30% for particles finer than 0.005 mm. At a given fine-particle content, the permeability coefficient of horizontal sampling tailings is the largest, followed by that of uniform tailings, with the permeability coefficient of vertical sampling tailings being the smallest. When low pressure is applied to tailings containing fewer fine particles, even though the pores are reduced in size, they are still connected. Only under high-pressure conditions can the connectivity of the pores of tailings containing few fine particles be reduced. When the fine-particle content increases, the fine particles fill the spaces between the coarse particles. Low-pressure conditions can then reduce the connectivity of the pores.","PeriodicalId":21918,"journal":{"name":"Soil Mechanics and Foundation Engineering","volume":"2 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141866603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Method for Calculating the Amount of Unfrozen Water in Frozen Saline Soils 冰冻盐碱土中未冻结水量的计算方法

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-31 DOI: 10.1007/s11204-024-09971-x

N. A. Protodyakonova, A. M. Timofeev, A. V. Stepanov, O. N. Kravtsova, N. I. Tappyrova

引用次数: 0

The Effect of Temperature Pathways on Unfrozen Water and Thermal Parameters of Frozen Soils 温度途径对未冻结水和冻结土壤热参数的影响

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-31 DOI: 10.1007/s11204-024-09970-y

Zhixiang Chen, Jielong Rao, Yong Wan

引用次数: 0

Experience in Construction of a High-Rise Building on a Foundation Base with Underground Excavations 在地下挖掘的地基基础上建造高层建筑的经验

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-31 DOI: 10.1007/s11204-024-09973-9

N. Z. Gotman, Yu. A. Gotman, A. G. Evdokimov

引用次数: 0

Single Bored Pile Settlement Prediction Taking into Account the Elastic-Plastic Behavior of the Soil 考虑土壤弹塑性行为的单根钻孔灌注桩沉降预测

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-30 DOI: 10.1007/s11204-024-09965-9

R. F. Sharafutdinov, D. E. Razvodovskii, D. S. Zakatov

引用次数: 0

Experimental Investigation of Vertical and Lateral Bearing Behaviors of Single Piles 单桩垂直和侧向承载行为的实验研究

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-30 DOI: 10.1007/s11204-024-09968-6

Lei Zhang

{"title":"Experimental Investigation of Vertical and Lateral Bearing Behaviors of Single Piles","authors":"Lei Zhang","doi":"10.1007/s11204-024-09968-6","DOIUrl":"https://doi.org/10.1007/s11204-024-09968-6","url":null,"abstract":"Pile foundations may be subjected to a combination of vertical and lateral loads that are commonly not applied simultaneously. Model tests of six instrumented single piles embedded in remolded loess, in which self-developed equipment was used to carry out different loading sequences of vertical and lateral loads, were performed. The test results indicate that the preapplied lateral load can cause a decrease in the average skin friction of the pile shaft within 13 times the pile diameter below the ground surface, as well as an increase in the pile end resistance. The settlement of the pile top increases with the increase in the preapplied lateral load, and its rate of change increases with increasing vertical load and increasing preapplied lateral load. With the increase in the preapplied vertical load, both the horizontal displacement of the pile at the measuring point and the maximum bending moment of the pile shaft decrease. The location of the maximum bending moment of the pile shaft is between 2 and 4 times the pile diameter below the ground surface, which approaches the ground surface when the preapplied vertical load increases. The preapplied vertical load can increase the ultimate horizontal bearing capacity of the pile.","PeriodicalId":21918,"journal":{"name":"Soil Mechanics and Foundation Engineering","volume":"48 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141866608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Interlock-Enhanced Integral Geocell-Reinforced Foundation 互锁体增强型整体土工格室加固地基分析

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-30 DOI: 10.1007/s11204-024-09962-y

Juan Hou, Chenxi Chu, Xiangqian Lu, Xing Xing

引用次数: 0

Double Strength Reduction Method for Carbonaceous Rock Slope Considering Influence of Disintegration Degree 考虑崩解度影响的碳质岩石边坡双重强度降低方法

IF 0.8 4区工程技术

Soil Mechanics and Foundation Engineering Pub Date : 2024-07-30 DOI: 10.1007/s11204-024-09963-x

Zhao Li, Peng Mo, Junhui Luo, Shihai Wang, Zhenchao Chang, Haifeng Huang

引用次数: 0