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Application research of high pressure jet grouting pile in an underground engineering in Vietnam

Nguyen Xuan Loi, Wu Li, Nguyen Khanh Tung, Bui Quang Anh

Archives of Civil Engineering

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2020

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Vol. 66, nr 3

575--593

EN

High-pressure jet grouting pile is a kind of stratum reinforcement technology developed in recent years. Due to its characteristics of high solid strength, fast construction, low noise, safety and reliability, low cost, controllable reinforcement diameter, strong adaptability to stratum, and good reinforcement effect for soft soil, loose soil and water-rich stratum, high-pressure jet grouting pile technology has been more and more widely used in foundation treatment, water stop, and seepage prevention, tunnel lining and other fields in recent years. As a country with a relatively late development of underground construction engineering, Vietnam has little research on special geotechnical reinforcement technology, especially on special geotechnical reinforcement technology around urban underground construction engineering, especially on its theoretical analysis and practical application. Therefore, this thesis combines the Vietnam Trung Hoa tunnel project as an example, using the theoretical calculation formula and field monitoring measurement comparing the two methods, the high pressure jet grouting pile system research in Vietnam in the underground engineering reinforcement principle and application effect, get to the actual engineering design and construction has a guiding significance to the research, provides the reference for future similar projects. Finally, the application effect of high-pressure jet grouting pile in underground building reinforcement project is evaluated, which proves that high-pressure jet grouting pile has good applicability and economic benefit in underground building reinforcement project in Vietnam.

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Analiza posadowienia budynku wychylonego z pionu wskutek osiadania fundamentów

Trojnar K.

Przegląd Budowlany

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2009

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R. 80, nr 7-8

72-75

PL

W trakcie realizacji dwukondygnacyjny budynek mieszkalny uległ wychyleniu z pionu wskutek nierównomiernego osiadania fundamentu. Podobne przypadki występują często, gdy obiekty są posadowione na uwarstwionym, słabym podłożu z nachylonym stropem warstwy nośnej. Przeanalizowano i wyjaśniono przyczyny awarii i podano sposoby zabezpieczenia budynku.

EN

During construction, a two-storey residential building came to deviate from vertical as a result of non-uniform subsidence of the foundation. Similar cases occur frequently when structures are built on a weak, layered base with inclination of the roof of the supporting layer. The reasons for the problem are analysed and explained, and methods of securing the building are described.

3

Model numeryczny układu pal jet-grouting - grunt

Bzówka J.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2001

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Vol. 10, No. 1

131--140

EN

In the paper an elastoplastic FEM models for jet-grouting pile soil system are proposed. An real interlace zone around the jet-grouting core is introduced. All zones are modelled using the Coulomb-Mohr's constitutive laws. The most important task undertaken in the paper is parametric evaluating for soil, interface zone and jet-grouting core. The parameters for the soil and the jetgrouting core should be known from the laboratory tests (unconfined compressive test, triaxial tests) but for obtaining the parameters for the interface the author used the results of loading test and back analysis.