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How to calculate the spacing of the support layer and the supporting data of steel sheet pile?

Time:2016/10/20 11:10:47Nmu:647

Steel sheet pile is widely used in harbor, rivers, soil and sand or rock fall specialty to prevent collapse, flow fields, the quality and efficiency of construction excellent well received. Steel sheet pile support within the layer spacing and support is a certain scientific basis, not free to say it is a supporting algorithm of the expert below we Hengyong construction will bring everyone together to learn to analyze related technical aspects of the use of steel sheet pile by real data, we come to the specific look.
The calculation method of steel sheet pile supporting data
Data: 1 pile top elevation of H1:4.100m H2:3.000m Level 2 construction ground elevation H0:4.350m excavation bottom elevation H3:-3.400m excavation depth H:7.7500m 3 soil bulk density and soil 1:18.3KN/m3 average value of gamma gamma float density: 10.0KN/m3 internal friction angle and average diameter: b=9.0m long a=20.0m wide excavation excavation pit 20.10 ~ 4 were subsequently q:20.0KN/m2 5 pit
(1) the external force of steel sheet pile, acting on the pile soil pressure on the strength and stress distribution of the ka=tg2 (45 - /2) =tg2 (45-20.10/2) =0.49 kp=tg2 (45 + /2) =tg2 (45+20.10/2) =2.05
Pile lateral load conversion filling height h, h=q/r=20.0/18.3=1.09m above the top of pile earth pressure strength of Pa1 Pa1=r (h+0.25) Ka=18.3 * * * 0.49=12.0KN/m2 (1.09+0.25)
The water level of earth pressure strength of Pa2 Pa2=r (h+4.35 -3.00 Ka=18.3) * * * (1.09+4.35 -3.00) 0.49=21.8KN/m2 the earth pressure on the excavation face strength of Pa3 * Pa3=[r (h+4.35 + -3.00) (r-rw) (3.00+3.40)}Ka * =[18.3 (1.09+4.35 -3.00) + (18.3-10) x (3.00+3.40)] * 0.49= 47.8KN/m2 (cofferdam excavation face water pressure pump after) Pa4:Pa4= gamma (3.00+3.40) * =10 (3.00+3.40) =64.0KN/m2
Two, steel sheet pile support layer spacing
According to the arrangement of the steel sheet pile bending from the layout, look at the maximum bending can withstand the cantilever sheet pile top is determined from the maximum allowable span is how much? According to the calculation formula of steel sheet pile we =M/Wz to get specific and precise data. The maximum bending moment of M0=Wz * [Sigma]=189.0KN*m