Studia Geotechnica et Mechanica最新文献_第8页

Analysis of the temperature effect on the stresses and deformations of GRP panels during the grouting process when using relining technology 分析了在注浆过程中温度对GRP板应力和变形的影响

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0032

Z. Fyall

引用次数: 2

Identification of residual force in static load tests on instrumented screw displacement piles 螺旋位移桩静载试验中残余力的识别

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0025

A. Krasinski, M. Wiszniewski

引用次数: 0

Bearing capacity of eccentrically loaded strip footing on spatially variable cohesive soil 空间变粘性土偏心加载条形基础承载力研究

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0035

Jędrzej Dobrzański, M. Kawa

{"title":"Bearing capacity of eccentrically loaded strip footing on spatially variable cohesive soil","authors":"Jędrzej Dobrzański, M. Kawa","doi":"10.2478/sgem-2021-0035","DOIUrl":"https://doi.org/10.2478/sgem-2021-0035","url":null,"abstract":"Abstract The study considers the bearing capacity of eccentrically loaded strip footing on spatially variable, purely cohesive soil. The problem is solved using the random finite element method. The anisotropic random field of cohesion is generated using the Fourier series method, and individual problems within performed Monte Carlo simulations (MCSs) are solved using the Abaqus finite element code. The analysis includes eight different variants of the fluctuation scales and six values of load eccentricity. For each of these 48 cases, 1000 MCSs are performed and the probabilistic characteristics of the obtained values are calculated. The results of the analysis indicate that the mean value of the bearing capacity decreases linearly with eccentricity, which is consistent with Meyerhof's theory. However, the decrease in standard deviation and increase in the coefficient of variation of the bearing capacity observed are non-linear, which is particularly evident for small eccentricities. For one chosen variant of fluctuation scales, a reliability analysis investigating the influence of eccentricity on reliability index is performed. The results of the analysis conducted show that the value of the reliability index can be significantly influenced even by small eccentricities. This indicates the need to consider at least random eccentricities in future studies regarding probabilistic modelling of foundation bearing capacity.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43570300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Stress-weighted spatial averaging of random fields in geotechnical risk assessment 岩土工程风险评估中随机场的应力加权空间平均

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0039

W. Brzakala

引用次数: 1

Analysis of the structure of liners used for the modernisation of brick collectors 砖石集热器现代化用衬板结构分析

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0031

L. Wysocki, C. Madryas, J. Grosel

{"title":"Analysis of the structure of liners used for the modernisation of brick collectors","authors":"L. Wysocki, C. Madryas, J. Grosel","doi":"10.2478/sgem-2021-0031","DOIUrl":"https://doi.org/10.2478/sgem-2021-0031","url":null,"abstract":"Abstract Brick sewers were designed as egg-shaped, pear-shaped, bell-shaped, vaulted, and even rectangular (sometimes with granite ceilings and floor slabs). In exceptional cases, circular sections were also made of brick. Efforts were made in order to ensure optimal flow conditions, and also that the cross-section was adapted to the shape of the rock mass pressure line. This is due to the fact that the most advantageous shapes for masonry collectors are shapes in which no tensile stresses will occur in any part of the cross-section under the influence of external loads. Nevertheless, sewage conduits degrade over time. The boundary conditions of their use also change, which affects the magnitude of mechanical and hydraulic loads. Further use of a sewer in such a case requires its renewal, and less frequently, modernization that results from the necessity to change its function. This is usually done by introducing a new conduit into the interior of the renovated or modernized sewer, which in literature is called a liner. The aim of the analysis was to determine the thickness of the liners that strengthen the structures of brick channels with an inverted egg cross-section and with dimensions of 1050 × 700 mm, which are intended for gravitational sewage systems. The analysis included the performance of variant static and strength calculations for the assumption that the conduit after its modernization will be replaced with a conduit operating in the pressure system, which is a very rare requirement. It was assumed that the best solution would be to use a CIPP (Cured In Place Pipe) liner.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45807433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An innovative rainwater system as an effective alternative for cubature retention facilities 一种创新的雨水系统作为容积保留设施的有效替代方案

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0037

Patrycja Stanowska, J. Dziopak, D. Słyś, M. Starzec

引用次数: 4

Numerical analysis of the transport of brine in the Odra River downstream of a mine's discharge 矿井排水口下游奥德拉河盐水输送的数值分析

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0036

Szymon Zieliński, S. Kostecki, P. Stefanek

{"title":"Numerical analysis of the transport of brine in the Odra River downstream of a mine's discharge","authors":"Szymon Zieliński, S. Kostecki, P. Stefanek","doi":"10.2478/sgem-2021-0036","DOIUrl":"https://doi.org/10.2478/sgem-2021-0036","url":null,"abstract":"Abstract The mining of underground deposits causes the inflow of water to workings and the necessity of pumping them to the surface. The mining plant of KGHM Polska Miedź S.A. extracts copper ore in plant branches with different hydrogeological conditions. The inflowing water into the workings is characterised by variable mineralisation, which depends on the location of the branch. In the south-western part of the deposit, a low-mineralised stream with a relatively high flow rate can be observed, while the outflow of highly saline waters occurs in the north-eastern branch. Despite the activities undertaken that aim at using the pumped-off mine waters industrially, it is necessary to deposit them into the Odra River. Reducing the environmental impact on the Odra River is one of KGHM's goals, which is being implemented by stabilising its salt concentration at a safe level. The paper presents the results of a 3D simulation of brine plume propagation based on a numerical model of advection–diffusion and turbulent flow. Bathymetric data from a section of the river approximately 500 m long and point data from an Odra water quality test were used to develop and validate the model. The paper discusses the types of factors that minimise the impact of brine discharge. The developed model will be used in the future to propose solutions that accelerate the mixing of mine waters with the waters of the Odra River.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42838778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modern concrete pipes: a review of reinforcement and new technologies 现代混凝土管道：钢筋与新技术综述

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-12-01 DOI: 10.2478/sgem-2021-0038

T. Abel, Natalia Pelczar

引用次数: 0

Vibro piles performance prediction using result of CPT 基于CPT结果的振动桩性能预测

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-11-22 DOI: 10.2478/sgem-2021-0024

Paweł Więcławski

引用次数: 0

An iterative algorithm for random upper bound kinematical analysis 随机上界运动学分析的迭代算法

IF 0.6

Studia Geotechnica et Mechanica Pub Date : 2021-11-10 DOI: 10.2478/sgem-2021-0027

M. Chwała

{"title":"An iterative algorithm for random upper bound kinematical analysis","authors":"M. Chwała","doi":"10.2478/sgem-2021-0027","DOIUrl":"https://doi.org/10.2478/sgem-2021-0027","url":null,"abstract":"Abstract A new approach for stochastic upper bound kinematical analyses is described. The study proposes an iterative algorithm that uses the Vanmarcke spatial averaging and kinematical failure mechanisms. The iterative procedure ensures the consistency between failure geometry and covariance matrix, which influences the quality of the results. The proposed algorithm can be applied to bearing capacity evaluation or slope stability problems. The iterative algorithm is used in the study to analyse the three-dimensional undrained bearing capacity of shallow foundations and the bearing capacity of the foundation for two-layered soil, in both cases, the soil strength spatial variability is included. Moreover, the obtained results are compared with those provided by the algorithm, based on the constant covariance matrix. The study shows that both approaches provide similar results for a variety of foundation shapes and scale of fluctuation values. Therefore, the simplified algorithm can be used for purposes that require high computational efficiency and for practical applications. The achieved efficiency using a constant covariance matrix for one realisation of a three-dimensional bearing capacity problem that includes the soil strength spatial variability results in about 0.5 seconds for a standard notebook. The numerical example presented in the study indicates the importance of the iterative algorithm for further development of the failure mechanism application in probabilistic analyses. Moreover, because the iterative algorithm is based on the upper bound theorem, it could be utilised as a reference for other methods for spatially variable soil.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2021-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44384354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0