Stabilizing of High-altitude Position of the Centrifuge's Foundation by Compensation Grouting Technique During Underground Tunneling

Merkin, V. E.; Konyukhov, D. S.; Simutin, A. N.; Medvedev, Grigoriy

doi:10.1016/j.proeng.2016.11.763

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Compaction grouting is a common technology that is widely utilized in different industrial projects, such as tunnel reinforcement [33], settlement reduction [17,19] and fracture control [32]. Experiments and numerical simulations were carried out to analyze the grout efficiency, grout pressure and pore pressure on compaction grouting [1-3, 6, 16, 23, 24, 27-29, 34].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the performance of compaction grouting in structured clay using a hypoplastic model

Diao,

Jia,

Zhu

et al. 2023

Preprint

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Previous studies on compaction grouting mainly focused on reconstituted clay but did not consider the widespread structure of natural clay. Unlike reconstituted clay, the stress state and void ratio are independent in structured clay due to weathering. Thus S, the state parameter of structured clay, was proposed in this paper to more accurately describe the state of structured clay. Rs, the relative state parameter of structured clay was also proposed to normalize S. Then the numerical hypoplastic constitutive model of structured clay was implemented to evaluate the performance of compaction grouting in structured clay. It shows that the grout efficiency increases with sensitivity when Rs=0 but decreases when Rs=1. Besides, the grout efficiency and grout pressure decrease with increasing Rs. For structured clay with different values of S, there exists a certain value of Rs where the grout efficiency and grout pressure are equivalent to those of the corresponding reconstituted clay. Furthermore, the results were compared with those of heavily overconsolidated clay. It is determined that although negative pore pressure appears in both the horizontal direction and vertical direction in the structured clay when Rs=0, it only appears in the horizontal direction in heavily overconsolidated clay during grouting.

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Section: Introductionmentioning

confidence: 99%

Numerical study of the performance of compaction grouting in structured clay using a hypoplastic model

Diao,

Jia,

Zhu

et al. 2023

Preprint

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show abstract

“…Parameters for the numerical analysis of soil-cement mixture are evaluated and recommended. Merkin et al [Merkin, Konyukhov, Simutin et al (2016)] presents technique of regulated constructing elevation of buildings after their settlement because of tunneling under them. Control of buildings' elevation is based on preliminary calculation of grouting zones positions, injection sequence and injection volumes.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behaviors and Deformation Properties of Retaining Wall Formed by Grouting Mould-Bag Pile

Sheng-cai¹,

Tang²,

Guo³

2019

Structural Durability &Amp; Health Monitoring

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The simplified mechanical model and finite element model are established on the basis of the measured results and analysis of the grouting pile deformation monitoring, surface horizontal displacement and vertical displacement monitoring, deep horizontal displacement (inclinometer) monitoring, soil pressure monitoring and seepage pressure monitoring in the lower reaches of Wuan River regulation project in Shishi, Fujian Province. The mechanical behavior and deformation performance of mould-bag pile retaining wall formed after controlled cement grouting in the silty stratum of the test section are analyzed and compared. The results show that the use of controlled cement grouting mould-bag pile technology is to strengthen the soft stratum for sealing water and reinforcement, so that it can rock into a retaining wall, which can both retain soil and seal water with excellent effect. The control of cement grouting technology not only makes the soft soil rock in the range of retaining wall of mould-bag pile, but also makes a wide range of soil around the mould-bag pile squeeze and embed to compaction; and its cohesion and internal friction angle increased, so as to achieve the purpose of reducing soil pressure and improving mechanical and deformation properties of retaining wall.

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Numerical evaluation of the upheave and soil arching associated with compaction grouting in shield tunneling and loading process

Wang

Zheng²

2022

Tunnelling and Underground Space Technology

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Stabilizing of High-altitude Position of the Centrifuge's Foundation by Compensation Grouting Technique During Underground Tunneling

Cited by 4 publications

References 2 publications

Numerical study of the performance of compaction grouting in structured clay using a hypoplastic model

Numerical study of the performance of compaction grouting in structured clay using a hypoplastic model

Mechanical Behaviors and Deformation Properties of Retaining Wall Formed by Grouting Mould-Bag Pile

Numerical evaluation of the upheave and soil arching associated with compaction grouting in shield tunneling and loading process

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