Installation of Pit Fencing in Cramped Conditions

The construction of buildings and structures in cramped conditions requires from builders and geotechnicians close attention [1-12] related to the need to preserve the objects of the surrounding buildings. In this article, a successful example of fencing the pit of a building under construction, located surrounded by existing structures, is given.
Administratively, the construction site of a six-storey residential building is located in Nizhny Novgorod in cramped conditions of urban development. It was built on a non-developmental territory. Surrounded by a house under construction in the zone of geotechnical influence, there are six objects of existing development (see Figure 1), including two objects of the OKN (objects of cultural heritage).
Geomorphologically, the survey site is located on the watershed plateau of the Oka and Volga rivers. Elevations of the surface of the earth within the site vary from 135.9 to 136.3 B.S. (at the mouths of engineering and geological workings). The terrain is planned. The engineering and geological structure of the site to a depth of 20.0 m is represented by undissected upper-middle quaternary loess loams (prQII-III), opened with a capacity of 1.7-2.5 m, undissected upper-middle quaternary loam loams (prQII-III), with a capacity of 14.5-16.6 m, from the surface of the sediments covered with bulk soil (tQIV), with a capacity of 1.7-3.0 m.
All engineering and geological workings are plotted on the layout plan of engineering and geological workings. The geological and lithological structure of the site is characterized by columns of wells and engineering-geological sections. The hydrogeological conditions of the site to a depth of 20.0 m at the time of the survey (July-August 2017) are characterized by the presence of an aquifer confined to Quaternary sediments. The groundwater level was recorded at depths of 4.5-6.4 m. The aquifer is non-pressure, the water-containing soils are loess loam. Water wells have not been opened. The aquifer is fed by atmospheric infiltration precipitation and leaks from water-carrying communication.
The geological and lithological structure of the site is presented in Table 1 (Table 1) (Figures 1-6).

Table 1: Resource requirements by component.

Table 2: Resource requirements by component.

Below in Table Figure 2 shows the algorithm for the device of ERT drill injection anchors (Table 2).

1. Brown-injection piles and soil anchors ERT, being buried reinforced concrete structures of the pit fence during the construction of a six-story residential building, made it possible to build an object without negative consequences for buildings of the surrounding buildings.
2. The algorithm for the installation of soil anchors ERT has been tested on many objects of geotechnical construction. It is mandatory in the manufacture of brown injection ERT anchors.

None.

No conflict of interest.

1. Ilyichev VA, Mangushev RA, Nikiforova NS (2012) Experience of mastering the underground space of russian megalopolises. Osnovy, foundations and mechanics of soils. 2: 17–20.
2. Ulitskiy VM, Shashkin AG, Shashkin KA (2010) Geotechnical support of urban development. SPb.: Georeconstruction p.551.
3. Ilichev VA, Konovalov PA, Nikiforova NS, Bulgakov LA (2004) Deformations of the Retaining Structures Upon Deep Excavations in Moscow. Proc. Of Fifth Int. Conf on Case Histories in Geotechnical Engineering, New York, USA. pp.5–24.
4. Ilichev VA, Nikiforova NS, Koreneva EB (2007) Computing the evaluation of deformations of the buildings located near deep foundation tranches. Proc. of the XVIth European conf. on soil mechanics and geotechnical engineering. Madrid, Spain. Geo-technical Engineering in urban Environments, 2: 581–585.
5. Nikiforova NS, Vnukov DA (2011) Geotechnical cut-off diaphragms for built-up area protection in urban underground development. The pros, of the 7thI nt. Symp. Geotechnical aspects of underground construction in soft ground, tc28 IS Roma, AGI, 2011, No.157NIK.
6. Nikiforova NS, Vnukov DA (2004) The use of cut off of different types as a protection measure for existing buildings at the nearby underground pipeline’s installation. Proc. of Int. Geotech. Conf. dedicated to the Year of Russia in Kazakhstan. Almaty, Kazakhstan, pp.338–342.
7. Petrukhin VP, Shuljatjev OA, Mozgacheva OA (2003) Effect of geotechnical work on settlement of surrounding buildings at underground construction. Proceedings of the 13th European Conference on Soil Mechanics and Geotechnical Engineering. Prague.
8. Sokolov NS (2018) Ground Anchor Produced by Electric Discharge Technology, as Reinforced Concrete Structure. Key Engineering Materials. pp.76–81.
9. Sokolov NS (2018) Use of the Piles of Effective Type in Geotechnical Construction. Key Enginiring Materials. pp.70–74.
10. Sokolov NS (2021) Electro Discharge Technology strengthening the foundation of the foundations. Housing construction. 9: 36-42.
11. Sokolov NS (2021) One of the cases of reinforcement of the base of the deformed anti-landslide retaining wall. Housing construction. p.12.
12. Sokolov NS (2022) Technological aspects of increasing the reliability of existing retaining walls. Housing construction. No.1-2.