Task Assessment Student Copy - RIICWD507D - Geotechnical Design (3)

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Stott's College *

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302

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Civil Engineering

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Apr 3, 2024

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TASK ASSESSMENT QUESTIONS RIICWD511E Prepare Detailed Design of Subdivisions Unit Assessment (Theory) Unit Name Unit Code Student Name Student Id Number Unit Summary Pre-requisite units Assessment evidence must be attached to this form Result S = Satisfactory US = Unsatisfactory NA = Not Assessed Assessment -1: Activities r attached S US NA Assessment -2: Assignment r attached S US NA Assessment -3: Written test r attached S US NA In order to be deemed “Competent” in this unit you must attain a “S” in this assessment you need to answer all the questions Student feedback Assessor Declaration I declare that I have conducted a fair, valid, reliable and flexible assessment with this student, and I have provided appropriate feedback Assessor Name: __________________________ Signature: ________________________ Date: ____/_____/_____ Student Declaration I declare that I have been assessed in this unit, and I have been advised of my result. I also am aware of my appeal rights. Student Name: ____________________________ Signature: ____________________________ Date: ____/_____/_____
NOTE TO STUDENTS These instructions must be followed when doing the assessment in this unit. This competency is to be assessed using standard and authorised work practices, safety requirements and environmental constraints. Assessment of essential underpinning knowledge will usually be conducted in an off-site context. Assessment is to comply with relevant regulatory or Australian standards' requirements. Resource implications for assessment include: • an induction procedure and requirement • realistic tasks or simulated tasks covering the mandatory task requirements • relevant specifications and work instructions • tools and equipment appropriate to applying safe work practices • support materials appropriate to activity • workplace instructions relating to safe work practices and addressing hazards and emergencies • material safety data sheets • research resources, including industry-related systems information. Reasonable adjustments for people with disabilities must be made to assessment processes where required. This could include access to modified equipment and other physical resources and the provision of appropriate assessment support. What happens if your result is ‘Not Yet Competent’ for one or more assessment tasks? The assessment process is designed to answer the question “has the participant satisfactorily demonstrated competence yet?” If the answer is “Not yet”, then we work with you to see how we can get there. In the case that one or more of your assessments has been marked ‘NYC’, your Trainer will provide you with the necessary feedback and guidance, in order for you to resubmit/redo your assessment task(s). What if you disagree on the assessment outcome? You can appeal against a decision made in regards to an assessment of your competency. An appeal should only be made if you have been assessed as ‘Not Yet Competent’ against specific competency standards and you feel you have sufficient grounds to believe that you are entitled to be assessed as competent. You must be able to adequately demonstrate that you have the skills and experience to be able to meet the requirements of the unit you are appealing against the assessment of. You can request a form to make an appeal and submit it to your Trainer, the Course Coordinator, or an Administration Officer. The RTO will examine the appeal and you will be
advised of the outcome within 14 days. Any additional information you wish to provide may be attached to the form. What if I believe I am already competent before training? If you believe you already have the knowledge and skills to be able to demonstrate competence in this unit, speak with your Trainer, as you may be able to apply for Recognition of Prior Learning (RPL). Credit Transfer Credit transfer is recognition for study you have already completed. To receive Credit Transfer, you must be enrolled in the relevant program. Credit Transfer can be granted if you provide the RTO with certified copies of your qualifications, a Statement of Attainment or a Statement of Results along with Credit Transfer Application Form. (For further information please visit Credit Transfer Policy.
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Task 1. A soil investigation was conducted for a proposed construction site to prepare a comprehensive geotechnical report. Initially, soil samples were collected and sent to the laboratory for analysis. The geotechnical engineering team subjected the samples to different tests to get technical information and specify the correct site classification according to Australian Standard AS 2870/2011 and NCC. The results reveal the composition of the soil as below: · Clay: 38% · Silt: 35% · Sand: 27% As a technician, you are required to prepare a report that includes the following information: a. Refer to the USDA soil texture triangle and find out the soil type. The entire process of soil classification should be discussed and show the exact type of soil on the USDA soil texture triangle. – clay loam b. By knowing the soil type, refer to NCC, volume two, part 3.2.4, and find the site class. - Stiffened raft
Assumption: § Slightly reactive clay sites: up to 40% clay § Moderately reactive clay or silt sites: up to 54% clay § Highly reactive clay sites: up to 60% clay § Extremely reactive sites: above 60% clay c. Select the appropriate type of footing for the obtained site class. Justify the selected type of footing and explain the advantages of this footing as compared to other types of footing. – explain clay loam and the foundation picked Task 2. Geotechnical report is one of the very first documents that should be handed over to structural design team. What information must be included in such a report? Please fill out the table in the answer sheet. (Name minimum of 10 items) – refer to soil report. No Headings Brief explanation on the info included. 1 2 3 4 5 6 7 8 9 10 11 12 13 Task 3. Retaining walls are often found in places where extra support is needed to prevent the earth from moving downhill. In this case, excavation before putting the retaining wall can cause cracks in the surrounding properties due to soil settlement or land sliding that can even cause structural collapse. Your company has been awarded a Design& Build contract for a mid-rise building project. As a civil technician, you are expected to understand the design and construction details handed over by the design engineer. A geotechnical report was given to the design engineer for his/her analysis. The design engineer designed two retaining wall systems along the boundaries. The highlighted area of the site was determined for a 3-meter excavation. The site location shows the northern, eastern, and western boundaries which are 18, 25, and 25 meters, respectively. Consider the followings for the cost: - The prefabricated concrete: $75.00 per cubic meter
- The reinforcement: $35.00 per kg - The total formwork activities: $2500.00 As the civil technician, you are appointed to propose the cost-effective design. System 1. Screw piles The system includes 6-meter piles, capping beam, and grout injection in between the piles. The section area of the capping beam is 450mm X 550mm and its required reinforcement cage weighs 3 kg per meter of the cage. The interval of piles on the eastern is 2.5 meters (cl to cl) and on the northern and western boundaries is 2 meters (cl to cl). Each pile cost $1800.00, and the grout injection requires 20kg fine cement per square meter for the wall. The grout work contractor quoted $5 per kg including materials to complete the job per square meter of the boundaries’ faces. The photos of system 1 shows the end-product and the site location.
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(Provide your answer in the table shown in the answer sheet) Bill of Quantity- Screw piles Sr. No Items Unit Quantity Total Quantity Rate Amount Total
System 2. secant pile system This system includes 6-meter piles with a diameter of 550mm, a capping beam (450mm height and 550mm width), and its required reinforcement cage weighing 4kg per meter. The concrete piles are to be constructed next to each other with 300mm intervals, maximum. (Provide your answer in the table shown in the answer sheet) Bill of Quantity- Secant piles Sr. No Items Unit Quantity Total Quantity Rate Amount Total
Task 4. Explain the main stages to implement this project and determine the activities to be taken at each stage. – write down the ( main stages to implement) – 6 points per each stage 1. desk study/brain storming 2. site evaluation/ reconnaissance 3. Site preparation 4. Mobilization 5. construction Task 5 . Due to some reasons, the design engineer has to include the secant piles. However, the piles diameters remain concerning. The engineer has to constrain the piles’ diameters to save space for the basement and car bays. Put yourself as the team member in the brainstorming session and share your idea that how the concrete piles’ diameters could be minimized. A hybrid system could be the potential solution. (a) Explain how the system would work against the soil’s lateral pressure and - anchor system (b) prepare a sketch that schematically shows the elements in the retaining wall system. - Draw retaining wall`` Task 6. Identify a total of 10 potential risks at the design and construction stages and assess them using the risk matrix below. Include your answer in the allocated table in the answer sheet.
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Task 7. Explain the followings: (a) The trend of stress distribution due to the lateral soil pressure onto the piles (b) The location of maximum stress after 3 meters of excavation. Figure the pressure increases at the base or the button of the excavation due to the height of the soil (c) The role of capping beam – provide a connection point to the capping pile - explain the role of the capping beam/ KA 1. What is the geotechnical engineering? The soil investigation- soil mechanism and behaviour and the water level 2. What is the typical site inspection? You inspect the site to see the existing condition of the site. Dilapidation report 3. Why should site investigation commence in desk study? – brainstorming the condition of the site – because you will study some data. Discuss the hydrological data, 4. Why are bearing capacity assessment conducted? To determine the ability of the ground to design load. 5. What is the purpose of planning in geotechnical design? – during the plsnning you investigate 6. Describe unit rate estimation? 7. What are the types of geotechnical study in applicable to road projects?1. Visibility geotechnical study – traffic info pedes info, building 2.

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