## 1 Introduction
IV-high floodplain valley-reduction of natural outflow of \"SaryBulak\" and \"TuzdyZhyra\" streams-layering of sands, claye sands, and sands \(a(Q_{II\_IV})\). V-Lower floodplain valley-cansals, quarries, pits-sands, and sedimentary clays \(a(Q_{II\_IV})\). Figure 1: Main landforms of Nur-Sultan city by [PERSON] [23]. Recent experience in the construction of pile foundations in Nur-Sultan and the results of their research show the presence of excessive strength in the design of foundations, not taking into account the unreasonable costs of material and labor resources, funds, previous construction experience in these areas and the work of surface structures [24,25]. Insufficient information about the soil, incorrect choice of the type of piles, their length and horizontal dimensions, and failure to use the maximum load-bearing capacity of the foundation to the required level leads to structure failures [26]. As a result, the reduction of the design loads on the piles, the fact that the piles are not immersed to the design marks, requires the use of additional piles. In order to determine the above reasons and soil characteristics, it is often necessary to conduct additional soil examinations, which in general will lead to an increase in the cost of construction and exploration work [27]. In this case, it became necessary to create a geotechnical base for the city of Nur-Sultan, which allows digitalizing the existing data of engineering and geological surveys to this day and is able to preliminarily determine the vertical profiles of soil layers using existing boreholes data [28,29]; thus, contribute to a more accurate determination of the pile length and its sufficient bearing capacity. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**The Shape of the** & & & \multicolumn{2}{c}{**Landmarks**} \\ \cline{3-4}
**Terrain** & **Genetic Type of Terrain** & **Area** & **Horizontal** & **Vertical** \\ \hline \multirow{4}{*}{Accumulation} & Terrace over the first & & Widely observed on the & The height of the edge \\  & floodplainvalley-\(a(Q_{II-III})\) & & & \\  & middle and upper & river Ishim and in & & \\  & quaternary geological period & direct contact with the & & \\  & sands, clayey sands, sandy & & riverbed. Its width is & \\  & clays and clays & & up to 1–3 km & \\ \hline \multirow{4}{*}{Sculptured} & The watershed plain is & & & \\  & composed of Carboniferous & & & \\  & \(e(C_{I})\) and Jurassic \(e(J_{I})\) rocks, & & & \\  & with an average of modern & & & \\  & quaternary geological period & & & \\  & \(a(Q_{II-IV})\) with upper layers of & & & \\  & sand, clayey sands, sandy & & & \\  & clays and clays of different & & & \\  & particle sizes over sandy & & & \\  & clays and clays & & & \\ \hline \multirow{4}{*}{Sculptured} & Small hills-Carboniferous & & Located north and & \\  & \(e(C_{I})\) rocks, covered with a & & northeast of the Ishim & \\  & layer of sand, sandstones, & & River, and in the & \\  & loans of various sizes & & & \\  & \(a(Q_{II-III})\). & & south-east along the & \\  & & loans of various sizes & & river valley.Its \\  & \(a(Q_{II-III})\). & & development strip is up & \\  & & & & \\  & & & \\  & & & & \\ \hline \multirow{4}{*}{Accumulation} & High floodplain valley- & & & \\  & reduction of natural outflow & & Observed in small areas & The upper surface of \\  & of “SaryBulak” and & & on the left and right & the valley is not smooth \\  & “TuzdyZhyra” & & & \\  & streams-layering of sands, & & from 100 to 500 m. & and consists of many \\  & clayey sands, sands \(a(Q_{II-IV})\). & & & old canals with a depth \\ \hline \multirow{4}{*}{Accumulation} & Lower floodplain & & & \\  & valley-canals, quarries, & & \\  & pits-sands, sedimentary clays & & & \\  & \(a(Q_{II-IV})\) & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Explanatory notes on the geotechnical map of Nur-Sultan.