Experimental study on the performance of compensation grouting in structured soil

Zheng, Gang; Zhang, Xiaoshuang; Diao, Yu; Lei, Huayang

doi:10.12989/gae.2016.10.3.335

Cited by 7 publications

(9 citation statements)

References 27 publications

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“…Note that the effect of the structure of clay when R s =0 mentioned above is similar to that of heavily overconsolidated clay [8,25,26] in compaction grouting. Zheng et al [34] also noticed similarities in the grout pressure between compaction grouting in heavily overconsolidated clay and that in artificial structured clay. However, these two states of clay are totally different [8].…”

Section: Comparison Of Grouting In Heavily Overconsolidated Clay and ...mentioning

confidence: 88%

“…To verify the numerical model, the compaction grouting experiment on artificial structured clay carried out by Zheng et al [34] was simulated based on the previously mentioned model. A hypoplastic constitutive model of structured clay was adopted; the parameters of the clay are shown in Table 1.…”

Section: Grouting Model Verificationmentioning

confidence: 99%

“…A hypoplastic constitutive model of structured clay was adopted; the parameters of the clay are shown in Table 1. These parameters were calibrated by the compression experiment performed by Zheng et al [34], as shown in Fig. 4, which indicates that the parameters in Table 1 truly reflect the properties of clay.…”

Section: Grouting Model Verificationmentioning

confidence: 99%

“…For the first time, Zheng et al [34] carried out a compaction grouting experiment to analyze the grout efficiency and grout pressure in structured clay based on artificial structured clay. The authors discovered that the grouting performance in artificial structured clay was similar to that of heavily overconsolidated clay.…”

Section: Introductionmentioning

confidence: 99%

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

Diao,

Jia,

Zhu

et al. 2023

Preprint

Self Cite

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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: Comparison Of Grouting In Heavily Overconsolidated Clay and ...mentioning

confidence: 88%

Section: Grouting Model Verificationmentioning

confidence: 99%

Section: Grouting Model Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Diao,

Jia,

Zhu

et al. 2023

Preprint

Self Cite

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“…Based on the measured data of foundation pit, the working mechanism and environmental impact of prefabricated prestressed fish belly beam support system are studied from three aspects [1], prestress control, deformation control and stiffness control. The results show that compared with the traditional internal support, the prestress applied to the retaining structure fully excites the passive earth pressure before the excavation of the foundation pit, which makes the retaining structure deform outside the pit, so as to greatly restrict the inward displacement [2][3]. The measured data shows that the overall deep displacement of the retaining structure is less than 10mm [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Research on internal force of 3-D modeling of fish belly beam supported in foundation pit based on computer intelligent stress monitoring system

Yuan¹,

Huang²,

Cheng³

et al. 2022

HSET

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High prestressing force stiffness fish belly beam tool type combined internal support system, referred to as IPS construction method, is a new type of internal support structure system for deep foundation pit support, which is developed based on the principle of prestress and aiming at the shortcomings of traditional concrete internal support and steel support through a large number of engineering research and practical application, it is composed of fish belly beam (high-strength and low relaxation steel strand as the upper chord member. H-shaped steel as the stress beam, and H-shaped steel support beam with different length, butt brace, corner brace, column, cross beam, pull rod, triangular joint, preloading and jacking device and other standard components, and prestress is applied to form a plane restressed support system and three-dimensional structure system. Compared with the traditional concrete internal support and steel support, it greatly improves the overall stiffness and stability of the support system. Combined with the remote real-time monitoring system, it can effectively and accurately control the displacement of the foundation pit and greatly reduce the deformation of the foundation pit. This technology has made a major breakthrough in the internal support technology of deep foundation pit support. It is the most advanced internal support technology in the world. In this paper, a 3-D model of fish belly beam foundation pit support system is established completely, the stress characteristics of the support system are analysed by computer intelligent stress monitoring system, and the distribution areas of prestress and internal support stress are summarized, which can be used as a reference for this type of engineering experience in the future.

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Centrifugal Model Tests on the Bearing Capacity of Piles with Basement Construction Under the Existing Building

Zhang

Liang

2018

Proceedings of GeoShanghai 2018 International Conference: Advances in Soil Dynamics and Foundation Engineering

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Experimental study on the performance of compensation grouting in structured soil

Cited by 7 publications

References 27 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

Research on internal force of 3-D modeling of fish belly beam supported in foundation pit based on computer intelligent stress monitoring system

Centrifugal Model Tests on the Bearing Capacity of Piles with Basement Construction Under the Existing Building

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