The depth of soil freezing in Moscow was calculated for a number of sands, sandy loams, and loams. The calculation was performed by a numerical finite difference method (balance method). The amount of un-frozen moisture was accounted for in accordance with SP 25.1333.2012. As a climatic boundary conditions, a "typical" year was used. For comparison, the depths of soil freezing are calculated, calculated by the engineering method. It was found that the density, humidity, and salinity of soils strongly influence the depth of freezing, and this is not taken into account in the engineering method. At the freezing point of the soil, moisture freezes only in the most saturated with moisture soils. The obtained freezing depths, calculated with allowance for density, humidity and salinity of the soil, have values both smaller and larger than those obtained without taking into account the listed factors.

A brief comparative analysis of the main design provisions of SP 63.13330.2012 is given, showing that the calculations performed in accordance with it give a greater margin of strength and crack resistance in comparison with the previous SNiP 2.03.01-84*. However, the unjustified absence of a number of lowering coefficients in the calculation of the formation of cracks in prestressed reinforced concrete elements in the new SP technique leads to an overestimation of the cracking moment compared with the calculation according to previous standards. It seems that in the new joint venture it would be necessary to take into account in the calculation of the formation of cracks conditions that require the use of the coefficients  and sp, so as to correspond to the overall trend of the joint venture: a safety margin and a crack resistance reserve.

The article proposes to introduce static-dynamic model of the second level deformation in a complex stress-strain state torsion with bending at the time of spatial crack formation. These models take into account impulse action in the form of representative volumes of concrete cut from the reinforced concrete structure in the vicinity adjacent to the spatial crack of concrete prisms including the reinforcing bar and subject to central tensile with shear. In this case, the influence of internal stresses takes into account integrally, not directly, in cross-sections which have taken for cutting of the proposed second level models, through a specially-constructed first-level computational model. This first- level model simulates spatial section with internal forces arising in it, i.e. this influence is evident in a representative volume through such parameters as the distance between the spatial cracks, the stress in the working reinforcement of the investigated zone in second stage, and also in the determination of the main (or normal and shear stresses, depending on the cross-section has made) deformation (stresses) of concrete and deformation (stresses) of the reinforcing rod entering to the representative volume, which adjacent to the surface of another simulated not appeared spatial crack in stage Ia. The basic working hypotheses are given. Dependences were obtained for determining the stresses in the stretched reinforcement that would have arisen in this system if the n-system transition to the system (n-1) as a result of instant destruction of a section of the section k.

The article contains information on the performed studies to determine the level of intensity of electromagnetic fields (EMF) of the radio frequency range in the territory of a residential microdistrict near the TV tower. The studies were carried out in several stages for electromagnetic waves (EMW) with frequencies of 1 GHz, 2.45 GHz, 5 GHz, 7 GHz, which are the most characteristic for external sources common in the urban environment (cellular communications, television, radio communications). The results of full-scale studies of radiation intensity are presented in the article with the example of the city microdistrict with conclusions and recommendations. The results of full-scale studies for the indicated frequencies of electromagnetic waves are shown in the form of maps of electromagnetic fields indicating the intensity of the signal. The authors considered two methods for studying the intensity of electromagnetic fields in the built-up residential area.

The technical processes obtained during the survey of a five-story residential building in the city of Moscow are justified and considered. Revealed materials bearing external fencing and internal structures. As a result of the technical inspection, which was performed visually, mechanically and using devices in a selective manner, it can be stated that they are in a workable technical condition. During the survey work, the horizontal wall waterproofing was not opened. The destruction of the plaster layer of the outer enclosing structures and the peeling of the paint layer were noted. The slopes of the blind area and the blind areas, consisting of a concrete layer, which is in a satisfactory condition, have been studied. When inspecting balconies on the main, courtyard and side facades, damage was detected to their bearing structures, as well as corrosion damage to the reinforcement as a result of environmental degradation atmospheric influences. Recommendations are given for restoring the bearing capacity of the structure and carrying out works to restore aesthetic characteristics.

This article describes the features of the formation of air temperature in the spaces of glazed balconies and loggias for stationary conditions of heat exchange. There are two methods for calculating this temperature for an average air temperature of the heating period. One of these methods is based on the solution of the balance equation of the transmission heat transfers to the loggia. The second method is based on the solution of the heat balance equation with considering air exchange. There is method for calculating the energy-saving effect due to glazing of the loggia is proposed. An example is given of calculating the air temperature on a glass loggia both ways. It is obtained that the air temperature for the second method of calculation is lower than at the first. The value of energy-saving effect from the glazing of the loggia considered is estimated. When calculating the second method, it is lower than the first calculation. The second method of calculation is appropriate to use when developing a method for calculating energy consumption for heating and ventilation of residential buildings to determine their energy-saving class.

The frequency method of numerical computer analysis is proposed to calculate the heat stability of enclosing structures and buildings. The method is extended to the field of thermal processes in enclosing structures and rooms of buildings. Electro-thermal analogy is used. The structure or building is represented by an electrical circuit, the calculation of which is carried out in the frequency domain by means of automated programs for the analysis of electrical circuits. The amplitude-frequency characteristic shows the temperature dependences on the inner surface of the fence against the outside air temperature. The phase-frequency characteristic determines the time delay of the oscillations of the internal temperatures with respect to the oscillations of the outside temperatures. As a result, the parameters of heat stability (damping coefficient and delay of temperature fluctuations of the system) are found from the period of harmonic influences. Any parameters of structures and thermo-technical properties of materials can be used as the investigated quantities. The method makes it possible to obtain the results of an analysis of a thermal system with two or more harmonic influences on it, which in general have different amplitudes and phase shifts relative to each other. Examples of calculation of heat stability of enclosing structures and rooms of buildings are given. Examples allowed to obtain practically significant results.

In public buildings, planning systems have recently become widespread, in which the acoustic communication between rooms occurs through the spaces of common suspended ceilings for technological purposes. In the ceiling space noise comes from noisy rooms, penetrating through the ceiling design, as well as from air ducts placed in the ceiling space. Spreading in them, it then noises the lower lying rooms. To reduce noise propagating in the ceiling space, it is necessary to apply construction-acoustic measures. These include increasing the sound insulation of structures and sound absorption of the ceiling. When designing them, it is necessary to perform noise calculations before and after applying noise protection. To calculate the noise, a technique has been developed that takes into account the nature of noise propagation in the ceiling spaces, both in flat rooms. In this case, the duct is considered as a linear source of noise. The technique also takes into account the sound energy penetrating through the ceiling from "noisy" rooms. An example of noise protection design is given.

Established the main reasons for loss of warmth through basement floor of frame-monolithic buildings. Developed efficient design solutions of connections of external and internal walls to basement floor of frame-monolithic buildings taking into account climatic features of Far North and experience of construction of buildings. New method with using the multistage heat-insulating insert from the concrete blocks with low heat conductivity is offered. By the presented version of the design decision it is taken out a useful model patent "Structural connection of the enclosure design and basement floor over the сold and vented crawl space". Results of the analysis of temperature profiles for connections of external and internal walls with basement floor, are presented. Calculations of specific losses of warmth through connection of walls with basement floor depending on various parameters, are executed.

The results of investigations of the physico-mechanical characteristics of the layers of vibrodamped translucent elements and the parameters of fences from these elements on the sound-insulating capacity are presented. It is shown that in order to increase the sound insulation of translucent enclosures, it is possible to use as laminated elements layered structures consisting of glasses interconnected by translucent vibrodamping mastics. The performed analysis indicates significant reserves of a possible increase in sound insulation due to the purposeful design of translucent layered enclosures by appropriate selection of the parameters of layered elements and the physico-mechanical characteristics of the materials included in their composition. Investigations were carried out to assess the effect of the loss factor, the dynamic modulus of the vibration damping layer, and the dynamic modulus of elasticity of the outer layers on the sound insulation of layered translucent elements. An increase in the sound insulation of layered vibrodamped elements is shown in comparison with single-layered, equal in surface density, due to an increase in the loss factor and the displacement of the cut-off frequency of wave coincidence to the region of high frequencies.

With using non-steady calculation of temperature fields in ground have made parametric analysis of heat transfer from building through first floor slab over unheated basement. Heat balance defined as equality of heat transfer through first floor slab and through basement walls and floor. It is investigated influence of insulations (first floor slab, floor and walls of basement, blind area), geometric parameters (depth and width of the basement and width of the blind area) and of groundwater (depth and mobility). As the aim parameter used heat transfer resistance to outside air in steady state (calculation period about several decennaries). Simulations was made on example of Moscow region.

The document SP 51.13330.2011 "Noise protection" establishes standards for noise levels in various premises. Such compliance requires the compliance of premises to certain acoustic conditions, including a time-standard reverberation RT60. However, the document imposes no requirements on RT60 in the halls of cafes, restaurants, production areas and in areas with less than 500 m ³ in principle. In order to reduce the noise to the specified level can be calculated by identifying the supplementary Fund absorption, which is required in the room. In this article the method of calculation of additional fund absorption, which is required in the place to reduce noise levels to standard values.

The article presents the improving the energy efficiency of the chosen school building. Thermal modernization activities conducted in this building included a wide scope of improvements. The article presents the real results of the thermal modernization activity based on the monitoring of their effects conducted in selected educational building from 2011 to 2015 which was a representativ4e of the evaluated group of buildings. The analysis includes energy consumption for heating, ventilation and domestic hot water preparation and electricity consumption in chosen building. The monitoring of the results from conducted thermal modernization showed significant energy reduction effect and therefore also fuel consumption and exploitation costs of this building and pointed out a number of benefits resulting from this type of activity.

Problems of energy-savings are one of most actual in a world economy. The methods of decision of these problems to a great extent will determine the location of our society among the countries developed in an economic relation, and standard of living of the Russian citizens of зависить from the cleanness of atmosphere at incineration of sources of теплт for translation.The reasons of contaminations of atmospheric air, caused by теплопотерями in the houses of private sector from incineration of anthracite coal, are considered in the article. The basic bridges of cold are analysed through non-load-bearing constructions: foundations, garret coverages, walls with off-grade executed heat-insulation and windows. The ways of their non-admission of this marriage are shown.

Acoustic and economic efficiency of the noise barriers implemented in urban areas depends to a large extent on degree of integration into the urban environment. Often due to the lack of a proper integration, the placement of noise barriers causes negative aesthetic effects and spoils the existing urban area structures. To make a positive effect the principles of noise barriers integration in the urban structures must be provided. The article deals with the existing principles of integration of objects in the urban areas regarding noise barriers. The considered principles will help to make a better interaction between noise control installations and the existing objects at the structural, functional and architectural levels, and also to establish a dialogue between installed objects and adjacent urban spaces. The undertaken analysis covers the noise barriers integration within the historical, central and peripheral parts of the areas in provincial towns.

Climatic factors of the Central part of Eastern Siberia where the Republic of Sakha (Yakutia) is located are analysed. There is the most difficult climatic situation. Climate in Yakutia sharp and continental with severe long winter and in the hot short summer. Yakutsk is characterized by a low rainfall. Distinctive feature of Yakutsk is the big amplitude of temperatures, as during the winter and summer period, and within a day. In article the wall protecting designs of various type are considered. Are considered: polisterolbetonny blocks on technology Unikon, multihollow wall panels from a gas concrete, systems with the ventilated facade on a gas concrete and on foam concrete, the Canadian technology in the form of SIP panels, a bricklaying with the ventilated air gap. A comparative assessment of heattechnical parameters with use of the existing standard technique is given. It is established that the majority of the considered protecting designs meets the standard requirements, the best indicators have systems with the ventilated facades.

The technique of the complex accelerated assessment of durability of elements of the translucent protecting designs (TPD) is offered: sealants, sealing laying, double-glazed windows and aluminum shapes for a structural glazing of modern front systems under the influence of climatic factors. The essence of a method consists in conducting the accelerated laboratory researches by cyclic influences of variable positive and negative temperatures, humidity, ultra-violet radiation, the slaboagressivnykh of chemical environments (solutions) and salt fog (for aluminum shapes). On the basis of basic researches on climatic aging of construction materials two new modes of the complex accelerated tests under the influence of climatic factors of the moderate zone Russian Federation were developed for: sealants, sealing to a proklado and double-glazed windows (mode 1) and aluminum shapes (mode 2). Requirements to the organization and carrying out the complex accelerated tests, to the test equipment, to the tested samples are considered. Criterion for evaluation of results of tests is decrease in values of the main characteristics of a product after the set number of cycles of tests for each indicator. Characteristic criteria for evaluation of durability of the TPD elements are established

The process of harmonization of international regulations and the adoption in Russia of a series of standards and other normative documents in the area of wastewater (sewerage) requires rethinking traditional approaches in designing non-pressure drainage pipelines. The level of development of construction Sciences and complexity of the challenges facing design organizations, dictate the move to computerize the process of designing pipelines. Available design products should be systematized and compare for selecting optimal program to calculate with taking into account the results of current research in this field. In particular, the article discusses scientific developments and achievements in the development of methodology for non-pressure drainage pipelines. Identify the main directions of modernization of traditional methods of calculation and the criteria for inclusion in the normative document.