This article discusses the methods and techniques used in highway design, including alignment, profile, and cross section. It also explores different types of road construction methods and their cost-effectiveness.
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1 Civil ENGINEERING By Name Course Instructor Institution Location Date
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2 Task 1 Earthwork Earthwork is the process through which the soil is excavated, transported and placed somewhere else to pave way for the construction of engineering projects(Trenter, 2017, p. 328). There are three process which are involved in the earthwork process and they are; Excavating of the soil Loading and transporting of the soil Placing and compacting of the transported soil. Depending on the resources available, site conditions and the amount of work to be done, various equipment will be used in earthwork process(Aldiss, 2018, p. 72). Equipment used in earthwork process For the given scenario different equipment will be used to carry out different activities. The equipment have been grouped into three categories i.e. Excavating, transporting and compacting equipment. Equipment excavation These are the equipment that will be used for excavating the ground and they include; Bulldozers, power shovels, draglines, backhoes, scrapers and clamshells(Boettger, 2012, p. 285). Equipment used for transportation
3 These refers to the equipment that will be used to transport the excavated soil from the point of excavation to the point of placement and they will include; Dumpers, tippers, trucks, belt conveyors and graders(Hugo, 2015, p. 39). Equipment used for compaction These are equipment that will be used to compact the placed soil and they will include; smooth wheel rollers, sheep foot rollers, pneumatic tired rollers and the vibratory roller equipment. Earthwork techniques Different approaches and techniques will be usedduring the earthwork process some of the techniques that will be employed include; Levelling, U-cut, Borrow and cut to crossbill Methods used for measuring the earthwork: Bank measurement volume, compacted volume and loose measuring technique Methods to create complex foundation There are many types of foundations that can be used for the given project depending on the factors such as cost, ground conditions, the available materials and the nature of the load to be supported. Different foundations will be adopted will either be deep or the shallow foundations. The shallow foundations will be used where the load imposed on the structure is relatively low as compared to bearing capacity of the soil Where else the deep foundations are used where the bearing capacity of the surface soil is insufficient to support the imposed loads and thus there is need for the loads to be transferred to deep layers which have a higher bearing capacity(Practice, 2014, p. 41).
4 Method used for pilling works The piles will be installed through the drilling of the vertical holes into the soil by the use of a bore pilling machine. This will be achieved by the use of the pile drivers. The pilling work will be preferred in regions that have unstable surface soil. Different techniques can be used for pilling works depending on the material, function and the installation procedure(Ballard, 2012, p. 720).The following are the different types of the pile foundations methods; Based on use or function Friction piles Soil compaction piles Load bearing piles End piles Sheet piles Based on material and construction methods Timber piles Steel piles Concrete piles Work of drainage The Drainage work will involve activities such as: Diverting runoff of the storm water
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5 Control of rill type of erosion through sheet runoff management Portioning of the site into areas of drainage to make them manageable Minimizing soil erosion by controlling the velocity of the flow. Methods and techniques used in culvert and underpass construction The construction of the underpasses and the culverts will involve different techniques such as: The use of Pipe arch culvert This type of culverts refers to the culverts which are semi circled in shape. This type of the culverts are normally appropriate for the construction of underpasses where there is a large flow of water. Application of pipe culverts This is the commonly used , this type of culverts are normally round in shape and they exist in single or multiple numbers. Methods and techniques utilized in large and complex earth moving operations and deep excavations In the construction of the office blocks, deep excavation will be used while using an effective support system in protecting the cut. Since it is not possible to avoid groundwater completely, it will be advisable to use a cofferdam. The sheet pile cofferdam can be used for digging up to 15m deep Techniques used in dealing ground and slope stability for slopes found to be unstable
6 Use of external and internal stabilization system will be the most effective method to address the issue of instabilities of the slope. External stabilization will involve the use of steel bin walls, cantilever and timber crib. For the case of the internal stabilization, reinforcement mechanisms will be used. The retaining walls will be used in the reduction of the angle of the slope. Task 2 Hazards and risks associated with working in confined spaces and working on structures There will bemany risks and hazards associated with working in a confined spaces and they include: Toxic atmosphere, excessive heat, flowing or free flowing solids, flammable or explosive atmosphere and oxygen deficiency. Hazards and risks associated with working on tall structures There will may risks and hazards that might occur due to working on heights and they include; Accidents due to slip strips and falling, harmful materials, falling and moving objects, collapse of the structure and noise pollution from the working equipment and tools. Method statement of site installation The team that will be dealing with the site installation will be made of four members who will be getting directives directly from the managers regarding the following. Emergency of procedures Welfare facilities Possible hazards identification Restrictions regarding security Rules of the site
7 The process begins with the delivery of conservatory of about 7.5 tons by a lorry which is to be offloaded on the site by the team members. Issues relating to the safety and they will include the use of safety gadgets All the materials on site will need to be checked and any shortage noted should be reported to the team leader. The stacking of the components to be done in a manner that reflects the order of their requirement. This is to be followed by plumping of rainwater pipes that are properly fixed by the use of brackets Initial erection of the frames to be done. Finally hanging of the doors Opening vents fittings Trimming of the metal components of the roofing’s Roof glazing to follow Safety plan Duty to be performedRequirementsN/AName of individual responsible Supervision of site safety Need to be competent safety of the Crane operation Need to be qualified
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8 inspection and design and of false work Need to be qualified Checking of ladders conditions Need to be competent Use of heavy equipment Need to be qualified Plans to avoid fall at the site Need to be competent Construction site Risk Assessment plan Sample Form of risk assessment Name of the person carrying out an assessment: Date: Assessment steps:
9 Possible/known risk and hazards connected with the operations(Xia et al.2016): The possible aftereffects: What are the likely consequences? What is the likely degree of the damage? What kind of a person is actually or likely to be at risk? What remedies are to be put in place to remove the hazard or lower the level of risk? Are there risk control mechanisms that are likely to fail?What are the possible aftereffects? Any need for training? The degree of remaining risk: What kind of activity to be carried out in the event of an emergency: Any place or points to refer if any: Assessor’s signature:
10 Health and safety legislation and codes of practice related to civil engineering sites The Health and Safety at Work etc. Act 1974 (also referred to as HSWA, the HSW Act, the 1974 Act or HASAWA) is the primary piece of legislation covering occupational health and safety in Great Britain. The Health and Safety Executive, with local authorities (and other enforcing authorities) is responsible for enforcing the Act and a number of other Acts and Statutory Instruments relevant to the working environment. .Justification The determination of the proper site installations will be of importance in ensuring that the equipment and the materialsthat will be used for construction will remain during theperiod of the exercise.It should therefore not be undermined or overlooked. The safety plan that has been recommended will also help to reduce cases of accidents and death in the period of construction. Task 3 The environmental, quality, geotechnical and economic contests of a civil engineering problem The industrial complex is set to be located close to a river that drains its content into the Thames. The discharge from the industrial plant will definitely affect the water bodies. The surface runoff will carry spills of oil, diesel, and paint chemicals into the river. The excavation process will set loose debris and dirt that will again make water in the river to be turbid. These are possible environmental interference that must be given attention.
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11 How the geotechnical, quality, environmental as well as economic contexts poof the problem would be identified Containers that contain chemical including paint and oil ought to be properly monitored Applications of the chemicals used in the curing ought to be done upon the protection of the drains Surface runoff with pollutants ought to be managed at a certain place inclusive of pits The PH of the soil will effectively change as a result of the acid nature of the pollutants. This will affect the geological integrity of the area for other construction works. The groundwater quality will deteriorate and its treatment is expensive and such projects may not be economically viable. How the environmental, geotechnical, quality and economic contexts of the problem identified Containers carrying chemicals like paints, and oil should properly be monitored Application of the chemicals for curing should only be done after the protection of the drains. Surface runoff with the pollutants should be managed at a specific place including pits. The industrial complex is set to be located close to a river that drains its content into the Thames. The discharge from the industrial plant will definitely affect the water bodies. The surface runoff will carry spills of oil, diesel, and paint chemicals into the river. The excavation process will set loose debris and dirt that will again make water in the river to be turbid. These are possible environmental interference that must be given attention. The PH of the soil will effectively change as a result of the acid nature of the pollutants. This will affect the geological integrity of the area for other construction works. The groundwater
12 quality will deteriorate and its treatment is expensive and such projects may not be economically viable. Containers carrying chemicals like paints, and oil should properly be monitored Application of the chemicals for curing should only be done after the protection of the drains. Surface runoff with the pollutants should be managed at a specific place including pits. Task 4 Methods and techniques used in highway design The method used in the design of the road is a factor of the specifications of the highway which is influenced by the following factors: Road type to be made Order of street Nature of street Stacking out and about Traffic power out and about Viability prerequisites Budgetary portions and imperatives Accessibility of and characteristics of neighborhood material Landscape through which the street is passing Agreeability to the different fragments for development types of gear The design of highways is done alongside the guideline and standards of design. Such are often adopted by the national authorities and the design standards consider the speed, view
13 obstructions, road grade, and types of vehicles as well as stopping distances. The accurate use of the set standards alongside the accurate engineering judgment the engineers are able to design a road that meets the comfort, safety as well as aesthetic needs of the users. The design of the highway may be grouped into three main components including alignment, profile as well as the cross section. The cross section is often used in showing the position as well as the number of vehicles, bicycle lanes as well as sidewalks alongside the cross slope. The profile in the design of a highway is used in reference to vertical aspects of road that are inclusive of crest curves, sag as well as straight grades that link them The alignment is the route of road that is defined as a series of horizontal tangential curves Among the types of road construction methods include: Cement concrete road Earth road and gravel road Soil stabilized roads Bituminous or asphalt road Water bound macadam road Every one of streets do not carter for same measure of volume of traffic or pressure. Since the assets accessible close by for financing the development ventures are additionally pitiful, it is important to have streets which costs very less. Earth streets and balanced out streets are ordinary instances of ease streets.
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14 These earth and rock streets are one by and large find in town zones such are worked without and sub level planning and are for most part washed out in blustery season. Soil balanced out streets are fabricated a similar path as earth streets or rock streets yet sub level soil is set up by compacting to build its California Bearing Ratio that in turns balances out street under overwhelming burden Asphalt: In such development system, layer of asphalt is laid over a similarly thick rock base. Preferences of such type of street development are that asphalt delivers generally little commotion, its relative minimal effort contrasted with various materials, and is moderately simple to fix as well keep up. Concrete: Concrete is more durable than asphalt as well altogether more grounded also, however is very costly to lay and keep up Composite – Composite materials are regularly utilized in kinds of development that are progressively identified with support, reusing, as well restoration. Composite materials are mixes of asphalt as well concrete, and are commonly utilized in one of two techniques. Reusing – There are three run of mill kinds of development systems identified with reusing outside of upset or destroyed asphalt. Rubblizing, Cold/Hot set up Recycling as well as Full- profundity Reclamation Bituminous Solutions – Bituminous and other impermanent arrangements are kinds of development that are appropriate for use on low-traffic lanes. (a)Full profundity substitution (b)Hot or cold arranged street reusing
15 Methods and techniques used to create bridge foundations and flexible highway construction foundations The foundations of bridge are very ideal as they have to be of adequate strength that may support whole weight of bridge as well as traffic loads which have to be carried by bridge. Various foundation types are usable in construction of bridge foundation including: Pile foundations: These are normally slender columns otherwise long cylinders that are made of various materials including steel as well as concrete that are predominant used in provision of support to structures through transfer of their loads to required depths by end bearing or skin friction Caissons foundations: Also known as a pier foundation. This foundation type is a watertight retaining structure that is often usually applied in bridge piers construction. The foundation is often a fabricated hollow cylinder or box that is sunk into ground to specific depth that is then filled using concrete resulting in foundation. Drilled shaft foundation: The shaft foundations are often constructed within the provided deep excavation anchored using lining constructed in place as well as the subsequent filled using concrete or any other loading bearing units that are prefabricated. References
16 Aldiss, B., 2018.Earthworks.2nd ed. Kiev: Faber & Faber,. Ballard, B., 2012.Earth Works: Ceremonies in Tower Time.1st ed. Manchester: Smith Bridge Press. Boettger, S., 2012.Earthworks: Art and the Landscape of the Sixties.2nd ed. Texas: University of California Press. Hugo, N. R., 2015.Earth Works: Readings for Backyard Gardeners.5th ed. Paris: University of Virginia Press. Practice, G. B. C. f. C. o., 2014.Earthworks: British Standard Code of Practice.3rd ed. Sydney: British Standards Institution. Trenter, A., 2017.Earthworks: A Guide.3rd ed. Chicago: Thomas Telford.
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