Is there any app mining project with zero investment

1. Virtual miner can use mobile app mining, such as those bitcoin need graphics card physical miner can dig, mobile phone can't dig.

2. False. It's impossible and unscientific

4. The app that makes money in this way doesn't need to invest much money, but it needs to invest time. Only those who have spare time every day can do it.

5. No investment? Help other mine owners to work, so they don't have to invest

6. The so-called "separate calculation of soil and water" method is a method to calculate the earth pressure and water pressure separately and then add them up. This method is more suitable for the sandy soil layer with high permeability, and does not consider the problem of pore water pressure. The shear strength index is the effective strength index, and the total stress is equal to the effective stress“ When calculating the earth pressure, the method of "combined calculation of water and soil" takes the soil weight below the groundwater level as the saturated weight, and the water pressure is no longer calculated and superimposed separately. This method is more suitable for the clay soil with low permeability. For cohesionless soil, the algorithm of soil and water division is adopted. For cohesive soil, the algorithm of soil and water combination is adopted, and the shear strength index of unconsolidated and undrained soil is adopted. Soil and water partition algorithm, consolidated undrained shear strength index.

7. Based on the Coulomb earth pressure theory, the active earth pressure of retaining wall is assumed to be generated by the sliding wedge of filling behind the wall in the limit equilibrium state. The first-order differential equation of earth pressure strength on the retaining wall is established, and the exact solution is obtained The results are compared with the Coulomb formula and the experimental results. The results show that the resultant force of earth pressure under the three wall displacement modes is equal to the result calculated by Coulomb earth pressure formula, but the action points of resultant force of earth pressure are significantly different. Combined with engineering design, the size and distribution of active earth pressure on retaining wall and the value of action point are discussed, and some suggestions are put forward.

8. According to the type of soil, check the self dip angle of soil, and calculate according to the earth pressure

9. How to calculate the lateral pressure of retaining wall,
the lateral pressure of retaining wall is an equilateral triangle distribution. The top is set to zero and the bottom is the largest. Its size is equal to: the volume weight of the blocked soil multiplied by the height of the blocked soil
the volume weight of the blocked soil (T / m ^ 3) * the height of the blocked soil (m) = the lateral pressure (T / m ^ 2).

10. Calculation of horizontal seismic force of retaining wall

I. static method of aseismic retaining wall design atlas
FH = c1czkh Ψ G1
C1 - importance correction coefficient 1.1 CZ - comprehensive influence coefficient 0.25 KH - horizontal seismic coefficient 0.20 +
C1 Ψ — The distribution coefficient of horizontal seismic load along the wall height is 1.0
G1 - the weight of wall body of unit section is 70m2 × 18.5＝1295KN Fh＝1.1 × zero point two five × zero point two zero × one × 1295 = 71.3kn

2. Pseudo static method of code for seismic design of hydraulic structures
adding a horizontal seismic inertia force Qi Qi = khcz & # 8706 at the sliding weight center; Iwi
KH - horizontal seismic coefficient 0.15 CZ - comprehensive influence coefficient 0.25 & 8706; I - acceleration distribution coefficient 2.0 wi - weight of sliding body 1295kn Qi = 0.15 × zero point two five × two × 1295 = 97.2kn III. code for design of highway reinforced soil engineering
horizontal seismic force E = g × tan ζ G=W ζ= 2.50 G - weight of sliding soil ζ — Seismic angle
e = 1295 × Tg2.50 = 56.5kn
based on the different algorithms of the above specifications, the second horizontal seismic force FH = 97.2kn is taken to check the anti overturning safety factor of retaining wall: KS = MP / (MA + MH) MP -- the bending moment of passive earth pressure and fulcrum force on the pile bottom
MA -- bending moment of active earth pressure on pile bottom. MH - bending moment of horizontal seismic force on pile bottom. Ks=(1290.938+3402.781)/(2811.451+97.2 × 8)
Ks = 1.308 >= 200, meeting the requirements of the specification.