graduate student
Purpose: Research of interaction between ditch fencing constructions and ground massive in negative temperature period. Methods: Pursuing nature measurements on active construction site and numerical modeling. Data on stress-strain state of “ditch fencing -ground massive” system were obtained; the comparison of experimental data with calculation results were made; the proposal on accounting for additional efforts against frost heave in the system “ditch fencing -ground massive” was formulated. Results: It was established that magnitude of forces of frost heave can be significant that says on the necessity to consider them while engineering of unfastened ditch fencings. It follows according to obtained calculation estimation of frost heave forces effecting fencings that it’s necessary not just to take into account a ground freezing depth but also negative temperature values which at, efforts in ditch fencing constructions can reach the maximum. Practical importance: At comparison of experimental data with retaining wall calculation results, the factors are determined which out of, the loss of bearing capability of spacer system particular elements is possible. There’re also obtained the detailed data on joint work of fencing and ground massive at active construction site in geotechnical conditions of Saint-Petersburg.
frost heave, ditch fencing, spacer system, nature experiment, numerical modelling
1. Alekseev A. G. Promerzanie grunta v osnovanii fundamentnoy plity mnogoetazhnogo zdaniya i ego posledstviya [Soil freezing at the base of the foundation slab of a multi-storey building and its consequences]. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and civil construction]. 2018, I. 4, pp. 37-43. (in Russian)
2. Kamenskikh E. M. Primer silovogo vozdeystviya moroznogo pucheniya na ograzhdenie kotlovana pod svaynye fundamenty kopra skipovogo stvola [An example of the force impact of frost heaving on the fencing of a pit for pile foundations of a skip shaft pile driver]. Modernizatsiya i nauchnye issledovaniya v transportnom komplekse [Modernization and scientific research in the transport complex]. 2014, V. 1, pp. 417-420. (in Russian)
3. Samarin V. F. Vliyanie moroznogo pucheniya na vertikal'nye podpornye stenki [Influence of frost heaving on vertical retaining walls]. Rechnoy transport (KhKhI vek) [River transport (XXI century)]. 2009, I. 7, pp. 84-86. (in Russian)
4. Orlov V. O. Metod otsenki davleniya moroznogo pucheniya na ledogruntovoe ograzhdenie podzemnogo sooruzheniya [Method for assessing the pressure of frost heaving on the ice-ground enclosure of an underground structure]. OFMG [OFMG]. 1988, I. 3, pp. 25-28. (in Russian)
5. Paramonov V. N. Protsessy promerzaniya i ottaivaniya pri ustroystve podzemnykh i zaglublennykh sooruzheniy [Processes of freezing and thawing in the construction of underground and buried structures]. Zhilishchnoe stroitel'stvo [housing construction]. 2012, I. 9, pp. 21-25. (in Russian)
6. Grechishchev S. E. Kriogennye fiziko-geologicheskie protsessy i ikh prognoz [Cryogenic physical-geological processes and their forecast]. Moscow: Nedra Publ., 1980. 382 p. (in Russian)
7. Mel'nikov A. V. Laboratornye issledovaniya vertikal'nykh i gorizontal'nykh sil i deformatsii moroznogo pucheniya glinistogo grunta [Laboratory studies of vertical and horizontal forces and deformation of frost heaving of clay soil]. Vestnik grazhdanskikh inzhenerov [Vestnik grazhdanskikh inzhenerov]. 2012, I. 2, pp. 126-131. (in Russian)
8. Gutkin Yu. M. O gorizontal'nom davlenii moroznogo pucheniya glinistykh gruntov na ograzhdayushchie konstruktsii konechnoy zhestkosti [On the horizontal pressure of frost heaving of clay soils on enclosing structures of finite rigidity]. OFMG [OFMG]. 2014, I. 1, pp. 27-31. (in Russian)
