Design Project - Group assignment for geotechnical PDF

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Group assignment for geotechnical...

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Geotechnical Engineering Design Project

1. Executive summary Sriganesh contractors, will be undertaking and analysing the geotechnical aspects of this construction project. This report demonstrates the design of three retaining walls, a concrete industrial building, a car park and a steel water tank. The retaining structure on the northern side of the site is proposed to be an anchored sheet pile. These designs are proposed by analysing all the given information that includes the logs from three boreholes, loadings given by the structural engineer and information about existing structures inside and nearby the site.

2. Introduction The land was formerly used as a storage area for a petrochemical factory. This report details the geotechnical aspects of the factory complex prepared by the Sriganesh Contractors

Figure 1: 3D visual representation of proposed site (Google sketch 2019)

Figure 1 above, is a general 3D site representation of the proposed project. The height of the buildings is not accurate, and the position of boreholes are not included in the above figure. Geotechnical engineering facts on this document is primarily based on the provided facts from the purchaser as well as the facts from the 3 borehole logs. Data supplied from the consumer includes the design requirements, website online plan, heritage website statistics and the loading elements from a Structural Engineer. The borehole logs provided useful facts regarding the soil conditions. For further accuracy, similarly, soil investigations would usually be greater helpful. Existing Building water tank car park.

3. Site layout

Figure 2: Blueprint of the proposed site layout

LEGEND RETAINING STRUCTURE NORTH RETAINING STRUCTURE WEST RETAINING STRUCTURE EAST BOREHOLE

4. Site Ground Conditions By using the borehole log given, we ought to easily find the shape of soil at the site online even without going to the site personally. Furthermore, counting the quantity of blow we ought to decide many important records consisting of friction angle, the weight of soil, etc. The picture under also shows the cross-phase of the soil primarily based at the borehole log given. Also, further down, there can be the SPT-N cost table that's calculated by the use of the borehole log.

Figure 3: cross section of the ground layers of the site

Retaining walls planning There are total of three different retaining structures that are going to be built in the premises. 

Figure 4: Between the proposed building and water tank = sheet pile with anchor.

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Figure 5: Between the proposed building and existing building = inverted T-type retaining wall.

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Figure 6: Between the proposed building and planned car park = L-type retaining wall.

5. Retaining

structure

As obvious from the site in three retaining walls need t this project which is basically a widespread for the retaining walls around building. The

figure 2, o be designed for mat of the proposed most appropriate kind

of retaining wall has been decided on in segment 5.6 and their application steps have been distinct there.

Table above shows the types of retaining wall in each section from the site layout. The three types of failure considered during the analysis are as follows: 1. Sliding 2. Overturning 3. Bearing capacity. The minimum factor of safety for failure of retaining walls is 1.5 according to Australian standard, AS 1170. In Appendix 2, the calculations of the retaining wall types are mainly based on this standard which is shown below in figure 6.0-2 (Standards Australia 2016). The minimum issue of safety for failure of retaining walls is 1.5 in step with Australian standards, AS 1170.

5.1.1 Retaining Structure North (RSN) Sheet pile with embedded anchor was chosen for the maintaining shape on the northern side of the site between the proposed concrete building and the steel water tank. Table 5.1.1-1 below explains the criteria used which justifies why this kind

of retaining structure changed into chosen and describes how the risks for this option is negligible in this project. ADVANTAGES DISADVANTAGES Faster installation process.

Can be costly due to the required removal of temporary sheets.

Lightweight, easy to lift and handle. Cannot be reused when anchors corrode.

High noise levels during installation. Recyclable and reusable.

Occupies little space.

5.1.2 Design of Retaining Structure

Above, the depth under the ground of the sheet pile is 2 m. This is due to the fact the bottom of the water tank will have a reduced degree of 17 m and the concrete on the muse of the proposed building will have a discounted stage of 14

5.1.3 Detailing of Retaining Structure

Refer to appendix figure 10.1 for anchor embedded sheet pile analysis

5.2.1 Retaining Structure East (RSE) An inverted T-shaped wall turned into chosen for the maintaining structure at the eastern side of the site among the proposed concrete constructing and the present onestory double brick constructing. Table 5.2.1-1 below explains the standards used which justifies why this sort of maintaining shape changed into selected and describes how the risks for this selection are negligible in this project. ADVANTAGES

DISADVANTAGES

For same loads, it uses much less materials than a gravity wall.

Proper foundation needed and makes than gravity walls. excavation necessary.

Cost from extra requirements. Can hold greater pressure and also taller Proper foundation needed and makes than gravity walls.

5.2.2 Structure

5.2.3 Structure

Design of Retaining

Detailing of Retaining

Refer to appendix figure 10.2 for inverse T-shaped Wall Analysis

5.3.1 Retaining Structure West (RSW) L-shaped gravity wall was selected for the keeping structure on the western aspect of the site between the proposed concrete building and the prevailing one-storey double brick building. Table 5.3.1-1 beneath explains the standards used which justifies why this sort of keeping shape became chosen and describes how the dangers for this feature is negligible in this project. ADVANTAGES

DISADVANTAGES

Do not require a rigid base

If not build with correct material, there could be water drainage issues

Extremely safe and require no maintenance.

Easy to install and installation costs very low.

5.3.2 Design Structure

of Retaining

5.3.3 Detailing of Retaining Structure

Refer to appendix figure 10.3 for inverse T-shaped Wall Analysis

6. Footings 6.1 Water Tank Foundation Water tank foundation is essentially using the equal idea with Mat foundation; however, the designed shape would be unique because the water tank we are given is using circular shape footings. Because of the extraordinary in form, the calculation technique will differ a piece from the usual strip footings formula. Assumptions: water tank is full of water

6.2 Mat Foundation The Mat basis is formed by having non-stop slab underneath the column and wall that extends over the whole shape. Mat foundation additionally act as an assist for the constructing and its important utilization is for moving weight from column to the ground. Mat foundation is mainly excellent for use on susceptible soil due to the fact it allows the structure to distribute the weight of the complete structure to a much broader area. And for this case, our factor of safety for settlement of the mat basis may be 3.5.

7. Settlements The foundation settlement could be calculated by the usage of elastic method, and the formulation we use are trusted the form of the footings given. The formulas we're going to use includes Rectangular and Circular footing formula.

Afterward, we would calculate the Young’s Modulus through Es = 800(N+15) Finally, we would get the settlement of 172.6 mm for water tank foundation and 135.1 mm for Mat foundation.

8. Conclusion Sriganesh constructions crew will manage all of the projects important and might be doing their excellent on every aspects of the construction processes so that it will supply the excellent revel in to all our clients. We also make certain that each components of the building constructions right here will comply with the Australian Standards (AS 4768-2002) and the Building Codes of Australia. All the measurements and calculations done along with the standards used, selections of materials, designs, and the ratios on this proposal is probably changed if there are changes within the fields and some future adjustments.

9.Reference Author Year, Title of webpage, Description, Publisher, Place of Publication, viewed date, . Engineeringmyword 2020, engineeringmyworld, Benefits Of A Topographical Survey In A Building Project, viewed on 9th June 2020, < https://www.engineeringmyworld.org/benefits-of-a-topographical-survey-in-a-buildingproject/>. Wikipedia 2020, Wikipedia, retaining wall, Wikipedia, viewed on 9th of June 2020, < https://en.wikipedia.org/wiki/Retaining_wall>. Ischebeck Iberica 2010, Braced sheet piling walls with ground anchors, viewed 10th of June 2020 < http://www.ischebeck.es/en.home/tablestacado/anclajes-es.html > Reliable geoexpertise, deep excavation, SHEET PILE WALLS - RETAINING SYSTEMS FOR DEEP

EXCAVATIONS: Sheet Pile Walls, viewed on 11th of June 2020, < https://www.deepexcavation.com/en/sheet-pile-walls>. Meyerhof, G.G. 1970, 'Safety factors in soil mechanics', Canadian Geotechnical Journal, vol. 7, no. 4, page no.349-355.

10. Appendix 10.1: Anchor Embedded Sheet Pile Analysis

10.2: Inverse T-shaped Wall Analysis

10.3: L-shaped Gravity Wall Analysis...