title: Ð£ÑÐ¸Ð»ÐµÐ½Ð¸Ðµ ÑÐ»Ð°Ð±ÑÑ Ð³ÑÑÐ½ÑÐ¾Ð² Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¹ Ð·Ð´Ð°Ð½Ð¸Ð¹ ÑÑÑÑÐ¹Ð½Ð¾Ð¹ ÑÐµÐ¼ÐµÐ½ÑÐ°ÑÐ¸ÐµÐ¹
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Strengthening soft soils of building foundations by jet-grouting
Creators: name: ÐÐ¸ÑÐ°Ð¹Ð»Ð¾Ð²ÑÐºÐ¸Ð¹, ÐÐ°Ð»ÐµÑÐ¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: ÑÐ»Ð°Ð±ÑÐµ Ð³ÑÑÐ½ÑÑ
ÑÑÐ¸Ð»ÐµÐ½Ð¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¹
ÑÑÑÑÐ¹Ð½Ð°Ñ ÑÐµÐ¼ÐµÐ½ÑÐ°ÑÐ¸Ñ
Ð³ÑÑÐ½ÑÐ¾ÑÐµÐ¼ÐµÐ½ÑÐ½ÑÐ¹ ÑÑÐ¾Ð»Ð±
weak soils
strengthening
jet-grouting
ground cement post

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑÐ¿Ð¾ÑÐ¾Ð±Ð° ÑÑÑÑÐ¹Ð½Ð¾Ð¹ ÑÐµÐ¼ÐµÐ½ÑÐ°ÑÐ¸Ð¸ Ð´Ð»Ñ ÑÑÐ¸Ð»ÐµÐ½Ð¸Ñ ÑÐ»Ð°Ð±ÑÑ Ð³ÑÑÐ½ÑÐ¾Ð² Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¹ Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ¸ ÑÐ°ÑÑÐµÑÐ° Ð¾ÑÐ°Ð´ÐºÐ¸ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð² Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ Ð¾Ñ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¾Ð² Ð³ÑÑÐ½ÑÐ¾ÑÐµÐ¼ÐµÐ½ÑÐ½ÑÑ ÑÑÐ¾Ð»Ð±Ð¾Ð². 
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3. Ð¾ÑÐµÐ½ÐºÐ° ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÑÐµÐ¼Ð¾Ð³Ð¾ Ð¼ÐµÑÐ¾Ð´Ð° ÑÐºÑÐµÐ¿Ð»ÐµÐ½Ð¸Ñ Ð³ÑÑÐ½ÑÐ¾Ð² Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ñ ÐºÐ¾Ð½ÐºÑÐµÑÐ½Ð¾Ð³Ð¾ Ð·Ð´Ð°Ð½Ð¸Ñ.
Ð Ð°Ð±Ð¾ÑÐ° Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð° Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð´Ð°Ð½Ð½ÑÑ Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ½Ð¾-Ð³ÐµÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ñ Ð¸Ð·ÑÑÐºÐ°Ð½Ð¸Ð¹ Ð¿Ð»Ð¾ÑÐ°Ð´ÐºÐ¸ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð½ÑÑ ÐÐÐ Â«ÐÐ ÐÐµÐ¾ÑÐµÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸ÑÂ», Ð° ÑÐ°ÐºÐ¶Ðµ Ð¿Ð¾ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ°Ð¼ Ð¾Ð±ÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐµÐºÐ¾Ð½ÑÑÑÑÐ¸ÑÑÐµÐ¼Ð¾Ð³Ð¾ Ð·Ð´Ð°Ð½Ð¸Ñ, Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð½Ð¾Ð³Ð¾ ÐÐÐ Â«ÐÐ¾Ð¿Ð»Ð¾ÑÐµÐ½Ð¸ÐµÂ». ÐÑÐ»Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ ÑÐ°ÑÑÐµÑÑ Ð² ÐÐ Plaxis Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸ÐµÐ¼ ÑÐ¿ÑÑÐ³Ð¾Ð¿Ð»Ð°ÑÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð¼Ð¾Ð´ÐµÐ»Ð¸ Ñ ÑÐ¿ÑÐ¾ÑÐ½ÐµÐ½Ð¸ÐµÐ¼ (Hardening Soil Model), Ð¿Ð¾ÐºÐ°Ð·ÑÐ²Ð°ÑÑÐ¸Ðµ Ð½Ð°Ð³Ð»ÑÐ´Ð½Ð¾, ÐºÐ°ÐºÐ¸Ð¼ Ð¾Ð±ÑÐ°Ð·Ð¾Ð¼ Ð¼Ð¾Ð´ÑÐ»Ñ Ð´ÐµÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸, Ð´Ð¸Ð°Ð¼ÐµÑÑ Ð¸ Ð´Ð»Ð¸Ð½Ð° Ð³ÑÑÐ½ÑÐ¾ÑÐµÐ¼ÐµÐ½ÑÐ½ÑÑ ÑÑÐ¾Ð»Ð±Ð¾Ð² Ð²Ð»Ð¸ÑÑÑ Ð½Ð° Ð¾ÑÐ°Ð´ÐºÑ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ. 

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description: This work is devoted of the studying the strengthening weak soils by jet-grouting and the development of methods for calculating the settlement of a structure depending on the parameters of soil-cement pillars.
Tasks that were solved during the study:
1. Performing numerical mod eling and calculating the stress-strain state of the base before strengthening soils by jet-grouting;
2. Performing numerical modeling and calculating the stress-strain state of the base after strengthening soils by jet-grouting;
3. Assessment of the effectiveness for using the applied method of strengthening the soil of the foundation of a particular building;
The work was carried out on the basis of geotechnical data of the study site 
performed by PI Georekonstruktsiya LLC, as well as according for the survey results of the reconstructed building performed by Voploshenie LLC. The calculations were performed by Plaxis PC with using of the Hardening Soil Model, which clearly shows how the deformation modulus, diameter and length of the cement pillars have an affect to the settlement of the structure.
As a result, the main parameters of the soil cement pillars that affect the building's settlement were analyzed. These effective technological recommendations have been developed about the sequence of selection of the deformation modulus, length and diameter of cement pillars. After the researching, it was decided that increasing the modulus of defor mation of soil cement more than 300 MPa does not reduce sediment, but only increases the consumption of cement. It was also found that the strengthening of soft soils by spray cementation gives a significant improvement in the deformation properties of the base soils - the sediment decreases by 3.5-4 times.