Pile foundation
1 what is the basics principal in pile driving formulas
2 name of two sources of energy loss during pile driving
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A 2,400-kg pile driver is used to drive a steel I-beam into the ground. The pile...
A 2,400-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.80 m before coming into contact with the top of the beam, and it drives the beam 13.4 cm farther into the ground as it comes to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest. what is the magnitude and direction?
Now let’s apply the work–energy theorem to a more complex, multistep problem. In a pile driver,...
Now let’s apply the work–energy theorem to a more complex, multistep problem. In a pile driver, a steel hammerhead with mass 200 kg is lifted 3.00 m above the top of a vertical I-beam that is to be driven into the ground (Figure 1) . The hammer is then dropped, driving the I-beam 7.40 cm farther into the ground. The vertical rails that guide the hammerhead exert a constant 60.0 N friction force on it. Use the work–energy theorem to...
Suppose you begin with a pile of n stones and split this pile into n piles...
Suppose you begin with a pile of n stones and split this pile into n piles of one stone each by successively split- ting a pile of stones into two smaller piles. Each time you split a pile you multiply the number of stones in each of the two smaller piles you form, so that if these piles have r and s stones in them, respectively, you compute rs. Show that no matter how you split the piles, the sum...
A 2 400-kg pile driver is used to drive a steel I-beam into the ground. The...
A 2 400-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.80 m before coming into contact with the top of the beam, and it drives the beam 15.4 cm farther into the ground before coming to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest. magnitude direction --Select-- 1
A wrecking ball of mass 190 kg strikes a concrete pile from a vertical height of...
A wrecking ball of mass 190 kg strikes a concrete pile from a vertical height of 5 m. Determine the velocity that it strikes the pile with, and the energy released if it reaches a height of 2 m after striking the pile. It strikes the pile when it is at its lowest point.
A precast concrete pile (14 in. X 14 in.) in cross section is driven by a...
A precast concrete pile (14 in. X 14 in.) in cross section is driven by a hammer. If the maximum rated hammer energy is 400 kip.in, the hammer efficiency is 70%, weight of ram is 4.000 Kg. the pile length is 25 m, Coefficient of restitution is 0.35, weight of pile cap is 300 Kg, and E, is 480*100 lb ft number of blows for last 1 in. of penetration is 9. and FS is 5. Calculate the allowable pile...
Consider a pile of green wood chips at 60% moisture content (wet basis) and weighing 1...
Consider a pile of green wood chips at 60% moisture content (wet basis) and weighing 1 t. What is the oven-dry mass of biomass in the pile? The biomass has a heat of combustion of 16 MJ per oven-dry kg. This is the 'gross calorific value' corresponding to the heat output in a reaction of the type [CH,O]+O2 CO2(gas) +H2O(liq) The net calorific value (or 'lower heating value') is the heat evolved when the final water is gaseous; in practice...
calculate the depth of the pile and include end bearing capacity (Q_tip). What is the shortest length of pile (rounded to the foot) for your steel pile. Q_all = 20 tons An 18-in diameter smooth...
calculate the depth of the pile and include end bearing
capacity (Q_tip). What is the shortest length of pile (rounded to
the foot) for your steel pile. Q_all = 20 tons
An 18-in diameter smooth steel pile is driven into dense sand. Find the depth the pile needs to be driven (to the foot) using the following soil profile to achieve a capacity of 20 tons. Factor of Safety 2 K0.75 Water Table@10 D-20x 30 2.0 ALT lon e TABLE...
A subtraction game Subtraction games are two-player games in which there is a pile of objects,...
A subtraction game Subtraction games are two-player games in which there is a pile of objects, say coins. There are two players, Alice and Bob, who alternate turns subtracting 4.9. A SUBTRACTION GAME 19 from the pile some number of coins belonging to a set S (the subtraction set). Alice goes first. The first player who is unable to make a legal move loses. For example, suppose the initial pile contains 5 coins, and each player can, on his turn,...
2. For the driven pile shown in the soil profile below: Outside Diameter 2 Soft Clay...
2. For the driven pile shown in the soil profile below: Outside Diameter 2 Soft Clay (CL) Inside Diameter 111 Ysa 105 pcf Gu 500 psf, 0 30' Hollow (soil plugged) (Assume NC) Firm Clay (CL) Ya 115 pcf Gu 750 psf, 8 Soil (Assume NC) Note: Pile & soil profile are not drawn to scale 40 Plug a. Calculate the ultimate load carrying capacity of the pile tip (Qp) using Meyerhof's method. Assume that the total vertical stress at...
A 2 400-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.80 m before coming into contact with the top of the beam, and it drives the beam 15.4 cm farther into the ground before coming to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest. magnitude direction --Select-- 1
A precast concrete pile (14 in. X 14 in.) in cross section is driven by a hammer. If the maximum rated hammer energy is 400 kip.in, the hammer efficiency is 70%, weight of ram is 4.000 Kg. the pile length is 25 m, Coefficient of restitution is 0.35, weight of pile cap is 300 Kg, and E, is 480*100 lb ft number of blows for last 1 in. of penetration is 9. and FS is 5. Calculate the allowable pile...
Consider a pile of green wood chips at 60% moisture content (wet basis) and weighing 1 t. What is the oven-dry mass of biomass in the pile? The biomass has a heat of combustion of 16 MJ per oven-dry kg. This is the 'gross calorific value' corresponding to the heat output in a reaction of the type [CH,O]+O2 CO2(gas) +H2O(liq) The net calorific value (or 'lower heating value') is the heat evolved when the final water is gaseous; in practice...
calculate the depth of the pile and include end bearing
capacity (Q_tip). What is the shortest length of pile (rounded to
the foot) for your steel pile. Q_all = 20 tons
An 18-in diameter smooth steel pile is driven into dense sand. Find the depth the pile needs to be driven (to the foot) using the following soil profile to achieve a capacity of 20 tons. Factor of Safety 2 K0.75 Water Table@10 D-20x 30 2.0 ALT lon e TABLE...
2. For the driven pile shown in the soil profile below: Outside Diameter 2 Soft Clay (CL) Inside Diameter 111 Ysa 105 pcf Gu 500 psf, 0 30' Hollow (soil plugged) (Assume NC) Firm Clay (CL) Ya 115 pcf Gu 750 psf, 8 Soil (Assume NC) Note: Pile & soil profile are not drawn to scale 40 Plug a. Calculate the ultimate load carrying capacity of the pile tip (Qp) using Meyerhof's method. Assume that the total vertical stress at...
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