Ground reaction curve for tunnels with jet grouting umbrellas considering jet grouting hardening

Heidari, Mahdi; Tonon, Fulvio

doi:10.1016/j.ijrmms.2015.03.021

Cited by 44 publications

(8 citation statements)

References 39 publications

(52 reference statements)

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“…As we all know, at present, few state-owned enterprises have human resource management contracts. As state-owned enterprises, largescale electric power enterprises that penetrate into the national economy and people's lives have certain characteristics (Heidari and Tonon 2015). Therefore, they have no experience in human resource management.…”

Section: R E T R a C T E D A R T I C L Ementioning

confidence: 99%

RETRACTED ARTICLE: Groundwater pollution detection and power grid enterprise human resource management based on Markov chain

Fan

Luo

2021

Arab J Geosci

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In recent years, the accelerated development of industrialization, frequent agricultural activities, and delays in pollution control projects have greatly reduced groundwater sources in many areas, resulting in a wide variety of pollutants and complexity. Therefore, how to ensure the safety of groundwater source is the key to maintain the current social and economic development and people's health. The role of the Markov chain model in engineering applications in various basic fields shows strong vitality. Markov chain forecasting methods are not only widely used in hydrology, financial investment, life sciences, crop forecasting, human resource management, education management, and other fields but can also be used in groundwater pollution detection. As a large state-owned enterprise in China, the reform of the power system is being strengthened, and the business environment of the power grid company is undergoing tremendous changes. In order to overcome the current human resource management problems, the grid company is doing its best to improve its core competitiveness and implement human resource management. This article basically contains the basic aspects and the whole process of human resource management of power grid companies, which can help power grid companies improve their human resource management deficiencies and can provide a certain reference for the practice of human resource management of Chinese power grid companies and help their operations, solve the human resource management problems of the power grid company, improve the management efficiency and core competitiveness of the power grid company, and take the first step in the human resource management business with standard value. KeywordsMarkov chain . Groundwater pollution detection . Power grid enterprise . Human resource management This article is part of the Topical Collection on Smart agriculture and geo-informatics Responsible editor: Hoshang Kolivand

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Section: R E T R a C T E D A R T I C L Ementioning

confidence: 99%

RETRACTED ARTICLE: Groundwater pollution detection and power grid enterprise human resource management based on Markov chain

Fan

Luo

2021

Arab J Geosci

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“…Each of the above technologies has an optimal field of application, taking into account geotechnical conditions and architectural and structural features of buildings and structures [11,12]. Currently, common cement, special microcement, activated bentonites, mineral microfillers, as well as their combinations are used for soil grouting [11,13].…”

Section: Technological Basis Of Soil Consolidation Groutingmentioning

confidence: 99%

Technologies for the formation of soil-cement massifs when developing underground space in reclaimed lands and artificial islands

Kharchenko¹,

Kharchenko²

2021

General Question of World Science

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In order to harden or increase the soil impermeability formed when constructing hydraulic territories, injection cement-grouting technology can be effectively applied. Its obvious advantages include environmental safety, manufacturability, durability, and economic attractiveness. The soil conditions of artificial territories are characterized by extreme uniformity, which necessitates the use of various technical solutions for their hardening. The experience of applying various soil injection cement-grouting technologies that provide the specified efficiency of the design decisions made has been analyzed in the report.

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“…weak rock masses, which is easy to induce mud inrush, and then it will result in irreversible damage to the environment [1][2][3]. To deal with it, the grouting method, in terms of fracturing grouting, permeation grouting, filling grouting and compaction grouting, has been widely used to enhance the mechanical properties of weak rock masses in tunneling engineering [4,5]. Among them, fracturing grouting will be the dominant process [6], when grout injections are conducted in the ground with low permeability, such as soil.…”

Section: Introductionmentioning

confidence: 99%

Shear Properties of Grout-Rock Interface for Treatment of Mud Inrush

Li¹,

Zhang²,

Lianyong³

et al. 2022

Pol. J. Environ. Stud.

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Grouting is an effective method to strengthen weak rock mass in tunnel engineering to prevent and control mud inrush disaster. The hardened grout-rock consolidation involves not only the properties of hardened grout, but also that of weak rock masses. As a transition region between them, the grout-rock interface determines the overall strength, then the shear properties of which was investigated in this study. The gushed mud from engineering project and a kind of Portland cement grout were selected as raw materials. A test system that can apply high injection pressure was developed to simulate the actual generation environment of grout-rock interface. By using it, two sets of samples with three different water-to-cement (W/C) ratios: 0.8, 1 and 1.5; and three different injection pressures: 1 MPa, 1.5 MPa and 2 MPa were prepared. After that, the direct shear test and SEM test were conducted to study the properties of grout-rock interface. The results show that lower W/C ratio and higher injection pressure can result in larger cohesive strength as well as internal friction angle of samples. When W/C ratio was decreased from 1.5 to 0.8, the former increased from 171.95 kPa to 251.55 kPa, and the latter rose from 32.31° to 41.71°. Also, they increased by 73.59 % and 17.64 %, respectively, with injection pressure ranging from 1 MPa to 2 MPa. It is hoped that the data provided will aid in the design of grouting with this material in the future.

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Ground reaction curve for tunnels with jet grouting umbrellas considering jet grouting hardening

Cited by 44 publications

References 39 publications

RETRACTED ARTICLE: Groundwater pollution detection and power grid enterprise human resource management based on Markov chain

RETRACTED ARTICLE: Groundwater pollution detection and power grid enterprise human resource management based on Markov chain

Technologies for the formation of soil-cement massifs when developing underground space in reclaimed lands and artificial islands

Shear Properties of Grout-Rock Interface for Treatment of Mud Inrush

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