Sometimes pile driving contractors use predrilling when installing piles. This method consists of drilling a vertical hole that has a smaller diameter than the pile, then driving the pile into this hole. Could predrilling affect the side friction resistance? Why? Is the diameter of the predrill hole important? Why?

Q: Q3. A 1200-lb hammer falling freely through 3 ft drives a 600lb pile in. vertically into the ground.…

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Q: Why does The O-cell typically is attached to the tip end of a pipe pile prior to installation…

A: The Osterberg Cell is a hydraulically operated device fitted in the foundation. It is of high…

Q: he soil profile and soil properties at a site are shown in the table below. A group of 12 concrete…

A: Given data : Number of Piles : 12 3 x 4 matrix L = 12m D = 0.45m Pile spacing 1.5m   S = 3D =…

Q: Find the weight of the extra soil needed to be hauled off site after theterrain in the given diagram…

A: To determine the weight of soil that needs to be hauled off after for a formation level of 0 ft.…

Q: A single pile of diameter 50 cm and length 10 m is driven into clay having unconfined compressive…

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Q: Explain the inaccuracy of Pile Driving Formulas.

A: To determine the relationship between the dynamic resistance of a pile during driving and static…

Q: Define The local availability of each pile type

A: Pile foundation : Pile foundation is defined as a series of columns constructed or inserted into the…

Q: i) How do the soil stress states and strain states change by the installation and structural loads?

A: NOTE:- We are authorized to answer one question at a time, since you have not mentioned which…

Q: What are the two methods that are used to determine the capacity developed along the length of the…

A: Pile load capacity depends on a number of factors including cross section, pile length and shape…

Q: Explain why pile driving formulas are not reliable, and why a wave equation analysis is a better…

A: Solution: Pile driving formulas are not reliable because Pile Driving formulas are very simple.…

Q: In what situation would the LTP be complemented by a pile cap?

A: A pile cap is a mat-like structure made of cement, sand and small scales. This mixture is placed in…

Q: Problem 1: A concrete bored pile has a diameter of 800 mm as given in the figure below. Calculate…

A: The load-carrying capacity of the pile is equal to the sum of load distributed by the end bearing…

Q: determine the allowable load the pile can carry.

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Q: What would be the estimated ultimate tensile capacity of the pile?

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Q: Describe about the Uplift Capacity (Single Pile).

A: The uplift capacity of piles is used to predict the capacity of piles under uplift loading. This is…

Q: Describe the relationship between the capacity of a tested or analyzed pile and the driving record.

A: Relationship between the capacity of a tested or analyzed pile and the driving record is given by…

Q: Why does The O-cell typically is attached to the tip end of a pipe pile prior to installation.

A: - Pipe pile is most commonly used pie in deep foundations. - pipe pile transfers the upcoming load…

Q: Q 1. Which foundations are suitable to be constructed nearby water retaining structures e.g. dam's…

A: Caisson foundation is suitable to be constructed nearby water retaining structures .Caisson…

Q: A prestressed concrete pile is being driven into a saturated cohesive soil with a hammer blow count…

A: The loss in strength of soil is represented in terms of its sensitivity which denotes the degree of…

Q: What is a typical design group efficiency factor for piles driven into loose cohesionless soil…

A: The pile group efficiency is calculated from the ratio of the ultimate capacity of the group to the…

Q: Many engineers believe the only disadvantage to overdesigning pile foundations is the additional…

A: Yes,  that's true. When a foundation is designed with higher factor of safety, it requires larger…

Q: Discuss about the Carrying capacity of single pile in granular and cohesive soil ?

A: The   load bearing capacity of foundation soil or rock which enables it to bear and transmit load…

Q: d. Starting out from the condition where the water table is above the excavation line on both sides…

A: Brief concept introduction- Sheet Pile- Sheet piles are used to support earth retention and…

Q: Explain these two questions based on pile foundations: i) How do the soil stress states and strain…

A: 1) How do the soil stress states and strain states change by the installation and structural loads?…

Q: For a rigid pile cap with vertical piles at the middle and raking piles at the sides,what is the…

A: Brief concept- Piles are provided in the deep foundation where the applied load is very high and the…

Q: Describe about the Relation between pile capacity and driving.

A: The soil that surrounds a pile is substantially disturbed when pile is driven in normally to lightly…

Q: Explain the pile driving formulas used by engineers.

A: The main function of the pile foundation is  to transmit the load  through a material or stratum of…

Q: Sand falls into a conical pile at the rate of 10 cu. ft. per min. The radius of the base of the pile…

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Q: Discuss the ultimate load carrying capacity of the single pile when the pile embedded soil is; i)…

A: In Granular soils the ultimate load-carrying capacity: The pile drives load-carrying capacity from…

Q: Answer the following questions – showing in order, complete and correct handwritten solutions. Use…

A: As there are multiple questions posted, according to the guidelines only the first is being…

Q: Define Pile Driving Methods and Equipment

A: Solution: Methods of the pile driving includes:1. Dropping weight2. Explosion3. Vibration4. Jacking…

Q: A building is to be constructed on driven piles. The downward vertical load on each pile based on…

A: Load on each pile- 120k  FOS- 2.5  To determine- Rated hammer energy

Q: 10. The hammer of a pile driver weighs 1000 lbs and must be lifted a vertical distance of 6ft in 3…

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Q: Please help me solve The soil profile and soil properties at a site are shown  in the table below.…

A: Given data Number of Piles =12 n a 3 x 4 matrix L = 12m D = 0.45m Pile spacing 1.5m

Q: SITUATION 1: A pre-stressed concrete pile of length L is to be picked up by crane at two points,…

A: Due to the loading in the pile no cracking will be form hence the positive bending moment at mid of…

Q: The Danish pile-driving formula is to be used for field control of a pile installation. Steel pipe…

A: Part a.

Q: A proposed highway bridge will be supported by 180 piles, each about 18 m long. The design load per…

A: Number of piles required for pile load tests varies from 0.5% to 2% of the total piles of the…

Q: Estimate the group efficiency of a 4 X 6 pile group, consist- ing of 400 mm diameter concrete piles…

A: Answer:- 1. According to Converse Labarre the efficiency:

Q: 4. The following data was obtained in a vertical pile load test on 300 mm pile diameter pile.…

A: Safe load / Allowable load on a single pile should be the least of the following: 1 Two-thirds of…

Q: A 40 cm driven concrete pile driven through layered soil shown in figure below. Estimate the…

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Q: Which is the best reason for that the effects of pile installation cannot be calculated by the…

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Q: What are the main components in typically pile driving equipment?

A: There are various equipment for driving of pile in the ground. All of them have some component that…

Q: A concrete pile is 15 m long and has 406 mm diameter circular cross section. The pile is fully…

A: It is required to find I. Ultimate point load resistance of pile Ii. Total Ultimate skin friction…

Q: 8. Pile Capacity Calculations A 30" diameter friction pile which has a 24' length in contact with…

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Q: Note: Read the question carefully and give me right solution according to the question. A pile is…

A: Foundations are provided in a structure to provide stability and transfer the load to the soil…

Q: A pile group with a design load of 200 tons is to be used to support the individual column footings…

A: Okay, he should prefer the test with 385 tones of loads. Here is the solution.Given that,…

Q: Briefly explain the types of failures in pile groups.

A: Pile foundations are among the most common alternatives for heavy-duty constructions and those with…

Pricing Excavation and Backfill

Backfill, in construction, is the activity of returning the soil and gravel that are removed during building construction or using them again to toughen and support the foundation of the building or any other structural component.