Tag:complicated ground conditions

№11|2019

SEWERAGE NETWORKS

DOI 10.35776/MNP.2019.11.06
UDC 628.24:69.059

Perminov N. A., Klementyev M. N., Perminov A. N., PANKOVA G. A.

Analysis of maintenance geotechnologies and monitoring
of sewer tunnels in complicated geotechnical engineering conditions

Summary

A comprehensive approach to the selection of geotechnologies for the reconstruction of long sections of sewer tunnels in complicated ground conditions, under technogenic impact and continuous transportation of effluents is described. Based on the analysis of operating long-running sewer tunnels, as well as the results of an instrumental examination of their technical condition, the main factors of technogenic and natural origin that reduce their design safety and sustainable operation of the most loaded sections of the system of sewer tunnels are described. The lack of data on this issue in the regulatory framework and technical literature is noted. The advantages and disadvantages of the applied technologies of sewer tunnel rehabilitation are given. Recommendations and requirements to the rehabilitation of tunnels are proposed depending on the ground conditions, wear rate, section length, dynamics of wastewater transportation.

Key words

, , , , ,

Скачать/download (PDF) free access

 

№2|2020

SEWERAGE NETWORKS

DOI 10.35776/MNP.2020.02.09
UDC 628.24:626.132.4

Perminov N. A., Perminov A. N., Zhitenev A. I., Klementyev M. N., JUDIN M. Iu., Mezentsev A. F.

Choosing a technology for repairing sewers operated in difficult soil conditions with account of the geometric irregularity of the tunnel sections

Summary

Long-running sewer tunnels in large cities have a degree of deterioration of up to 55% or more. Difficult engineering-geological and hydrogeological conditions for tunnel laying, as well as intense anthropogenic impacts cause an increase in the defect rate of sewer tunnels. Based on calculations and hydraulic modeling, it is shown that with a high load of sewer tunnel networks and the impossibility to stop completely the transportation of effluents, the primary objective in choosing measures for repair and rehabilitation of tunnels is the search for technical solutions that provide for the maximum wastewater flow after the rehabilitation given the cross-section narrowing and geometrically irregular sections. The successful experience of SUE «Vodokanal of St. Petersburg» in the rehabilitation of sewers with narrowing sections without stopping the transportation of wastewater using technologies that meet these requirements is presented.

Key words

, , , , , , ,

Скачать/download (PDF) free access

 

vstmag engfree 200x100 2

mvkniipr ru