Patterns of Changes in the Mechanical and Filtration Properties of Semi-Rock Soils Modified by Jet Cementation

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When installing underground structures in soil layers with high groundwater filtration rates, special requirements are imposed on the material of anti-filtration curtains. The conditions of application of jet cementation technology for modification of watered fractured rocky soils of low strength in order to form a composite material with the required mechanical and filtration characteristics are considered.The technological parameters of the cementation process have been experimentally and theoretically determined to ensure the necessary radius of propagation of the bonding mixture, and methods of laboratory and field control of the modified zone have been developed. The maximum permissible values of the controlled parameters have been determined.

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作者简介

S. Zuev

JSC “New Ground”

编辑信件的主要联系方式.
Email: office@new-ground.ru

Deputy General Director

俄罗斯联邦, 35, Kronshtadskaya Street, Perm, 614081

O. Makovetskiy

Perm National Researh Polytechnic University

Email: office@new-ground.ru

Doctor of Sciences (Engineering)

俄罗斯联邦, 29, Komsomolsky Prospect, Perm, 614000

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2. Fig. 1. Construction of underground transport structures within the urban development

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3. Fig. 2. The route of the metro under construction

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4. Fig. 3. A map of the distribution of fractured semi-horizontal soils within the route of an underground structure

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5. Fig. 4. Isogyps map of groundwater within the route of an underground structure

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6. Fig. 5. Zone I – non-stop movement with a speed exceeding the critical one; Zone II – zone of formation of stable sediment due to sedimentation of cement particles, with a decrease in flow velocity and local filtration into microcracks of natural blocks; Zone III – zone of displacement of fractured water

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7. Fig. 6. Graph of the dependence of the increase in the strength set of the modified layer material on the hardening time

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