scholarly journals Arrangement of Multistory Underground Parking Garages in Complex Engineering and Geological Environment

2020 ◽  
Vol 5 (5) ◽  
pp. 897-912
Author(s):  
Olga Vladimirovna Trushko ◽  
Vladimir Leonidovich Trushko ◽  
Petr Alexeevich Demenkov
Keyword(s):  
Retaining Wall ◽  
Open Pit ◽  
Geological Environment ◽  
Solid Supports ◽  
Adjacent Building ◽  
Parking Lot ◽  
Soil Settlement ◽  
Parking Garages ◽  
Complex Engineering ◽  
Soil Excavation

This article discusses possible variants of underground parking lot in complex engineering and geological environment of St Petersburg, namely: soil excavation in open pit and excavation with solid supports. These methods were analyzed with regard to reasonability for preset construction conditions. A series of predictions were performed using Plaxis 2D software, two variants were described in this article: excavation with the bottom elevation of +0.560 m and excavation with the bottom elevation of -2,500 m and adjacent building (at the distance of 2.5 m). The formulated problems were solved using 2D models. The model was based on the Mohr–Coulomb theory which facilitated estimation of geotechnical environment in the vicinity of the construction. Predictions of retaining wall according to the two considered variants have demonstrated that maximum soil settlement near the excavation is 20 mm and the maximum additional settlement of building at the distance of 2 m from the excavation is 30 mm, which in both cases corresponds to predetermined specifications.

scholarly journals ANALISIS TIANG PANCANG SEBAGAI DINDING PENAHAN TANAH DENGAN MENGGUNAKAN PROGRAM METODE ELEMEN HINGGA

2020 ◽  
Vol 3 (3) ◽  
pp. 889
Author(s):  
Hans Wilsen Cahyadinata ◽  
Chaidir Anwar Makarim
Keyword(s):  
Groundwater Level ◽  
River Flow ◽  
Retaining Wall ◽  
Maximum Deflection ◽  
Construction Site ◽  
Flow Area ◽  
Concrete Piles ◽  
Coulomb Model ◽  
Soil Instability ◽  
Soil Excavation

In recent years the number of  infrastructure construction in Indonesia is surging. Sometimes soil excavation and filling at the construction site needed to be done. Disturbtion of soil may cause soil instability at the site so in order to prevent it from collapsing constructing a retaining wall is one  possible solution like constructing a retaining wall from concrete piles on river flow area to replace the old soil retaining wall that broke down. Rainfall is simulated by staging the rise of both groundwater and river surface level. The concrete piles used have dimension of 400x400 mm and 0,8 m between each pile and topped of with capping beam 0,8 m wide and 0,5 m thick. Calculation is done by program for deflection and moment of pile with Mohr-Coulomb model. Deflection and moment of pile when groundwater level is at -6 meter is 2,376 cm and 115,40 kNm, then 4,245 cm and 199,95 kNm when groundwater level reaches ±0 meter. The results will then be compared  agaisnt maximum deflection and moment allowed for the pile. After analysis is done it is found that both deflection and moment experienced a greater jump in value when groundwater level is nearing top of pile. AbstrakBeberapa tahun belakangan banyak pembangunan yang berjalan di Indonesia. Namun terkadang kontur tanah pada lokasi pembangunan kurang sesuai dengan kebutuhan desain sehingga dilakukan penggalian atau pengurugan. Pengubahan kontur tanah dapat menyebabkan ketidakstabilan pada tanah di lokasi sehingga salah satu solusi untuk mencegah terjadinya longsor pada tanah adalah dengan membuat dinding penahan tanah. Salah satu hal yang menarik adalah pembangunan dinding penahan tanah dari tiang pancang beton di daerah aliran sungai untuk menggantikan dinding penahan tanah lama yang rusak. Perhitungan akan mensimulasikan terjadinya hujan sehingga terjadi peningkatan muka air tanah dan permukaan sungai secara bertahap. Tiang yang digunakan pada pemodelan memiliki ukuran 400x400 mm dengan jarak antar tiang 0,8 meter yang dihubungkan oleh capping beam selebar 0,8 meter dan tebal 0,5 meter. Perhitungan dilakukan dengan program untuk mencari defleksi dan momen pada tiang pada pemodelan Mohr-Coulomb. Defleksi dan momen yang terjadi pada tiang saat muka air tanah -6 meter sebesar 2,376 cm dan 115,40 kNm, kemudian saat ±0 meter sebesar 4,245 cm dan 199,95 kNm. Hasil defleksi dan momen kemudian dibandingkan terhadap syarat batas yang sudah ditentukan sebelumnya. Setelah analisis dilakukan ditemukan bahwa kenaikan defleksi dan momen paling besar terjadi pada tahap dimana air naik mendekati puncak tiang.

Fuzzy Evaluation of the Impact of the Open-Pit Limestone Mining on Geological Environment

2014 ◽  
Vol 1073-1076 ◽  
pp. 454-459
Author(s):  
Hao Ran Liu ◽  
Shao Qing Chen ◽  
Sen Li
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment System ◽  
Evaluation Index System ◽  
Open Pit ◽  
Fuzzy Evaluation ◽  
Geological Environment ◽  
Evaluation Standard ◽  
The Impact

Through the current situation survey of geological environmental disasters caused by limestone mining in Chongqing and combined with the principles of establishing evaluation index system and industry experts’ advices, we get the geological environmental impact assessment system of open-pit limestone mining which is consist of 7 dimensions and 25 indexes. Using analytic hierarchy process (AHP) to assign the weight of 25 indexes and based on membership functions of trapezoidal distribution to establish evaluation standard, the fuzzy comprehensive evaluation model is constructed. According to the principle of maximum membership degree, we get the influence degree of the geological environmental system affected by the open-pit limestone mining in Chongqing. This model makes the impact on geological environment of limestone mining quantitative and plays a certain guiding role in the local environmental protection strategy formulation and geological disaster prevention.

scholarly journals Multivariate modeling of retaining walls

2019 ◽  
Vol 265 ◽  
pp. 05029
Author(s):  
Vladimir A. Dmitrienko ◽  
Irina A. Kapralova ◽  
Valeria V. Baklakova ◽  
Aleksei G. Iliev ◽  
Nataliya V. Merenkova
Keyword(s):  
Retaining Wall ◽  
Retaining Walls ◽  
Multivariate Modeling ◽  
Advantages And Disadvantages ◽  
Geological Surveys ◽  
Parking Lot ◽  
Earth Embankment ◽  
Elevation Difference ◽  
Protective Structures ◽  
Technical Solutions

When designing a parking lot of limited size with a large elevation difference, a decision to construct an earth embankment with a retaining wall was made. Based on the analysis of the results of engineering geological surveys and construction conditions, four options of constructing a retaining wall were considered. The stress-strain states of the protective structures and embankments were studied in details with the help of finite element modeling in order to select the optimal technical solutions for retaining walls. Based on the analysis of the distribution of stresses and strains in the structures, the advantages and disadvantages of each option are determined. The optimal combined version of constructing a thin retaining wall with unloading screens and hardening of the embankment by means of anchor-injectors is substantiated.

scholarly journals Foreign experience of designing parking garages for storing electric vehicles

2019 ◽  
pp. 5-10
Author(s):  
S. Kysil
Keyword(s):  
Electric Vehicles ◽  
Motor Vehicles ◽  
High Price ◽  
Design Solution ◽  
Electric Cars ◽  
Foreign Experience ◽  
Parking Lot ◽  
Parking Garages ◽  
Design Solutions ◽  
Charging Stations

The article describes the current trends of designing and constructing multi-storey parking garages for storing electric vehicles. It has already been established that at the present stage of technology development, traditional gas stations are transforming into charging stations, operating on solar batteries. These technologies incentivize searching for new design forms of buildings for storing motor vehicles with solar charging stations in their structure. This applies to both multi-storey and flat parking garages. The paper analyzes the existing foreign experience of designing multi-storey parking garages for storing and charging electric vehicles, and identifies their main functional planning features and technological methods of organization. The main attention is paid to the artistic and aesthetic side of the formation of these objects. Electric vehicles can be very energy efficient and clean, as long as they are charged using renewable electricity. However, they need to overcome some challenges, including short driving range, the high price, and the lack of a charging infrastructure. Today, many design solutions have been developed for storing electric vehicles. The simplest of them is the parking lot design with 1-2 parking spaces for storing and charging of electric cars. This parking lot has the appearance of an open area with markings and with an element of built-in charger. Design solutions of indoor tent parkings lots for storing electric cars are considered to be more practical and convenient in operation. The most frequent of them are with rectilinear construction and with curved awning design at their base. The absence of developed infrastructure is the most important problem in the development of environmentally friendly transport. For this reason the design solution of storage sites and electric charging stations plays an important role and will allow us to experience the potential of electric mobility, which is the future.

Impact of Open-Pit Mining on the Geological Environment

2020 ◽  
Author(s):  
L.A. Storozhenko ◽  
I.G. Petrova ◽  
Y.V. Klokova ◽  
I.O. Lymar
Keyword(s):  
Open Pit ◽  
Open Pit Mining ◽  
Geological Environment

Effectiveness Of Life Cycle Management Of Projects Using Information Modeling

2019 ◽  
pp. 24-29 ◽  
Keyword(s):  
Life Cycle ◽  
Construction Projects ◽  
Life Cycle Management ◽  
Information Modeling ◽  
Engineering Systems ◽  
Basic Principles ◽  
Complex Engineering ◽  
Domestic Practices ◽  
Capital Construction ◽  
Complex Engineering Systems

Improving the efficiency of life cycle management of capital construction projects using information modeling technologies is one of the important tasks of the construction industry. The paper presents an analysis of accumulated domestic practices, including the legal and regulatory framework, assessing the effectiveness of managing the implementation of investment construction projects and of complex and serial capital construction projects, as well as the life cycle management of especially dangerous technically complex and unique capital construction projects using information modeling technologies, especially capital construction projects, as well as their supporting and using systems, primarily in the nuclear and transport sectors. A review of modern approaches to assessing the effectiveness of life cycle management systems of complex engineering systems in relation to capital construction projects is carried out. The presented material will make it possible to formulate the basic principles and prospects of applying approaches to assessing the effectiveness of the life cycle management system of a capital construction project using information modeling technologies.

Engineering-Geological Studies Of The Territory, Soils Of Foundation And Foundations Of The Architectural Monument Of The "Melnikov’s House" In Moscow

2019 ◽  
pp. 41-51
Keyword(s):  
Working Condition ◽  
Overlying Water ◽  
North East ◽  
The North ◽  
Geological Processes ◽  
Architectural Monument ◽  
Geological Conditions ◽  
Zone Of Influence ◽  
Complex Engineering ◽  
Building Engineering

On the basis of engineering and design surveys of the building, engineering-geological and geophysical studies of the soils of the territory conducted by the article authors, as well as with due regard for the results of studies conducted on this territory by other authors, the features of the foundations, soils of their foundation and engineering-geological conditions of the territory of the Melnikov House are established. It is shown that the Melnikov house is located under complex engineering-geological conditions on the territory of high geological risk, in the zone of influence of tectonic disturbance. To the North of the area there is a zone of intersection of the observed disturbance with a larger disturbance that can have an impact on geological processes. To the North-East of the site of the Melnikov House, a sharp immersion of the roof of carbon deposits was revealed. It promotes groundwater seepage into limestone of the carbonate strata from overlying water-bearing sands and activation of processes of suffusion removal and sinkhole phenomena of the soil. The surveyed area is assessed as potentially karst-hazardous and adjacent to it from the North-East territory as karst-dangerous. In this regard any construction on the adjacent territory can provoke activation of sinkhole phenomena on the surface. The foundations of the building are basically in working condition. Existing defects can be eliminated during repair. The foundation soils mainly have sufficient bearing capacity. Areas of the base with bulk soil can be reinforced. However, when developing a project for the reconstruction of the building and its territory, it should be taken into account that the design of the Melnikov House does not provide for its operation on the loads at the formation of sinkholes.

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