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Delay analysis in construction contracts
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Good information for Engineers

This is the perfect method to calculate the percentage of any number

During the rainy season, local communities in developing countries faces severe service shortages caused by damaged roads and collapsed small bridges and culverts.
During the rainy season, culverts and small bridges can sustain damage due to various factors.
1. **Increased Water Flow:** Heavy rainfall leads to a surge in water flow in rivers and streams. Culverts and bridges may face challenges in accommodating this increased volume, resulting in potential damage.
2. **Erosion:** The force of flowing water can erode the soil around bridge foundations and culverts, weakening their structural integrity. This erosion can lead to settlement or even failure of the supporting structures.

3. **Debris Accumulation:** Heavy rains can wash debris like branches, rocks, and sediment downstream. Accumulation of such debris around or under bridges and culverts can hinder water flow, increasing pressure on the structures and causing damage.

4. **Flash Flooding:** Sudden and intense rainfall can lead to flash floods. The rapid rise in water levels can exert significant force on bridges and culverts, surpassing their design capacity and resulting in damage or collapse.
5. **Poor Maintenance:** Lack of regular maintenance can exacerbate the impact of rainy season challenges. Over time, wear and tear on the infrastructure may compromise its ability to withstand the increased stresses brought on by heavy rainfall.
6. **Inadequate Design:** Bridges and culverts designed without considering the local climate and potential extreme weather conditions may be more susceptible to damage during the rainy season. Proper design accounting for factors like water flow, soil stability, and potential debris is crucial.
To mitigate the risk of culvert and small bridge overtopping and collapse during heavy rainfall, several solutions can be implemented:
1. Hydraulic Analysis and Design: Conduct thorough hydraulic analysis to determine the maximum expected water flow.
2. Proper Sizing: Ensure that culverts and bridges are appropriately sized based on the expected water flow and future climate considerations.
3. Clearance and Freeboard: Design bridges and culverts with sufficient vertical clearance and freeboard to accommodate variations in water levels.
4. Debris Management:Implement strategies to prevent debris accumulation around bridges and culverts. This may involve the installation of debris screens, regular maintenance to clear debris, and planning vegetation control in the watercourse.
5. Streambank Stabilization:Address erosion issues by stabilizing streambanks using techniques such as riprap, vegetation, or retaining walls.
6. Emergency Spillways: Design and construct emergency spillways or overflow channels that can safely convey excess water away from critical infrastructure during extreme rainfall, reducing the risk of overtopping.
7. Climate-Resilient Infrastructure: Consider climate change projections and design infrastructure with future climate conditions in mind.
8. Regular Inspection and Maintenance: Establish a routine inspection and maintenance schedule to identify and address potential issues before they escalate.
These measures can be achieved using adequate guidelines and procedures, to enhance the resilience of the infrastructure to overtopping during the rainy season, reducing the risk of damage and ensuring the safety of transportation networks.
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Did you know 😏
During flood periods, that you can measure discharge of flood using markings on the roadway culverts and bridge 🌉 openings, over dams and highway embankments to analyze the impact of the flood for future flood mitigation techniques.
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A wide range of problem associated with soil mechanics, foundation engineering, concrete, reinforcement, masonry and asphalt technology have to be faced while working on highway irrigation and building projects. Keeping in view such difficulties. It has been emphasized to prope into and search out the proper and precise answers of the problems which may help the practicing engineers to perform in an authenticated way and to be enable them to produce a good result.
This book will be good reference to any practicing engineer to solve those problems.
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👉HOW TO CHECK QUALITY OF CEMENT ON SITE

(1)Colour Test--

✓colour must be uniform Or should be [Grey greenish shade]

(2)Float Test--

✓Take a cement and throw it into water and if -
°cement is sink in water then it has good quality
°cement floats it has bad quality

(3) Rubbing Test--

✓Take a pich of cement & rubbs in fingers if it is smooth it is good

(4)Date Of Packing--

✓As cement's age increases it's strength decreases

∆After 3 months of packing its strength decreases by 20 to 30%

∆After 6 months - Decreases by 30-40%

∆After 12 months - decreases by 40-50%
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Compulsory Ethiopian standard first Edition of 2015 version
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Concrete mix design steps
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Have you ever tried to make sure that the columns are not inclined?
For the flag
The allowed inclination is 3mm in every 1 meter height, that means a collumn with a height of 3 meters is allowed with an inclination of 9mm
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