The cross-section of a braced cut on a stiff, fissured clay (Y = 19 kN/m³, C = 40 kN/m2) is as shown in figure below. The centre to centre spacing of the struts along the length of cut is 2.5 m. The apparent earth pressure diagram for the soil is also shown below. Assuming no contribution of bottom of cut in stability of the sheeting, what are the loads in the two struts to maintain equilibrium on sheeting? Н4 2 m 2 m H H/2 B 2 m Н4 Lateral earth pressure Pa= 0.3yH

The cross-section of a braced cut on a stiff, fissured clay (Y = 19 kN/m³, C = 40 kN/m2) is as shown in figure below. The centre to centre spacing of the struts along the length of cut is 2.5 m. The apparent earth pressure diagram for the soil is also shown below. Assuming no contribution of bottom of cut in stability of the sheeting, what are the loads in the two struts to maintain equilibrium on sheeting? Н4 2 m 2 m H H/2 B 2 m Н4 Lateral earth pressure Pa= 0.3yH

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter14: Lateral Earth Pressure: Curved Failure Surface

Section: Chapter Questions

Problem 14.14P: The elevation and plan of a bracing system for an open cut in sand are shown in Figure 14.21. Using...

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The cross-section of a braced cut on a stiff, fissured clay (Y = 19 kN/m3, C = 40 kN/m?) is as shown in figure below. The centre to centre spacing of the struts along the length of cut is 2.5 m. The apparent earth pressure diagram for the soil is also shown below. Assuming no contribution of bottom of cut in stability of the sheeting, what are the loads in the two struts to maintain equilibrium on sheeting? %3D Н4 2 m 2 m H/2 2 m Н4 Lateral earth pressure Pa = 0.3yH 1.
A braced cut, 5 m wide and 7.5 m deep is proposed in a cohesionless soil deposit having effective cohesion c = 0 and effective friction angle, =36°. The first row of struts is to be installed at a depth of 0.5 m below ground surface and spacing between the struts should be 1.5 m. If the horizontal spacing of struts is 3 m and unit weight of the deposit is 20 kN / m', the maximum strut load will be.
A braced cut shown in Figure P19.3 is to be made to a depth of 9.0 m in a saturated clay deposit where the unit weight is 17.65 kN/m3 and the undrained shear strength is 30 kN/m2. The struts are spaced horizontally at 3.0 m center to center. Find the strut loads.
A braced cut is carried out to 10 m depth at a site where the soil consists of 4 m of sand ( = 17.0 kN/m3, = 33) at the top underlain by 6 m of clay ( = 18.5 kN/m3, c = 35 kN/m2). a. What would be the average value of cohesion and the unit weight for the equivalent homogeneous soil profile? b. Show the lateral earth pressure envelope you would use in determining the strut loads.
Refer to Figure 15.10a. For the braced cut, given H = 8 m; H, = 3 m; y, 17.5 kN/m³; angle of friction of sand, 4' = 34°; H¸ = 5 m; y. unconfined compression strength of clay layer, q, = 55 kN/m². a. Estimate the average cohesion (cav) and average unit weight (yav) for the con- struction of the earth-pressure envelope. b. Plot the earth-pressure envelope. 18.2 kN/m³; and
Situation 9: An 8m deep braced cuts in medium clay is shown. The unit weight = 16.5 kN/m3 and the undrained shear strength Cu = 27.8 kPa. In the plan, the struts are placed at spacing 2.4m center to center. Using Peck's Empirical pressure diagram: m 0.25H 2m В H= 8 m 0.75 H 2|m 2|m Pa = yh - 4Cu %3D 41. Compute the actual load on strut A. A. 124.57 kN C. 116.47 kN B. 153.48 kN D. 162.81 kN 42. Compute the actual load on strut B. А. 33.29 kN C. 28.42 kN B. 40.54 kN D. 35.29 kN 43. Compute the actual load on strut C. A. 127.92 kN C. 131.95 kN B. 210.38 kN D. 199.68 kN
Using 4, =0 analysis and assuming planar failure as shown, the minimum factor of safety against shear failure of a vertical cut of height 4 m in a pure clay having c, =120 kN/m² and Ysa = 20 kN/m' is 4 m Potential failure plane
Soil with an internal angle of friction of 40° and a cohesion of 10 kPa is excavated to a depth of 6 m prior to the placement of a retaining wall. The stability of a trial wedge with a horizontal angle of 25° is being investigated. The soil above the wedge weighs 12 kN/m of wall. 12 kN/m 6 m as=25° What is most nearly the available shearing resistance along the indicated slip plane? O A. 70 kN/m B. 140 kN/m O C. 150 kN/m OD. 180 kN/m
H.W 2: _Find the collapse load (Wu) for the isotropic slab shown below by using yield line theory. Assume m* = m= 25 kN.m 6 m 4 m 3m
3. A cantilever retaining wall is installed in soil having a cohesion of 36 kPa. The slip surface of a trail soil wedge is 29 m long, and the weight of the soil above the slip surface is 23 kN/m. The angle of failure plane is 17° from the horizontal, and the angle of internal friction is 31°. What is the available shear resistance per foot of soil? Answer in units of kN/m. 4. Limited laboratory studies indicate that for a certain silt soil, the effective pore size for height of capillary rise is 1/5 of D10 is the 10 percent particle size from the grain-size distribution curve. If the D10 size for such a soil is 0.02 mm, estimated the height of capillary rise. 5. The results of a constant-head permeability test for a fine sand sample having a diameter of 150 mm and a length of 300 mm are as follows:
Check the stability of concrete retaining wall shown in figure against sliding and bearing capacity. The backfill consists of two layers having geotechnical properties as shown in table below. Layer (kN/m²) 0 18 35 25 B'- 1 m B 2.5 m. XkN/m 19 18 Layer 1 Layer 2 2 m 5 m 180 200
Q3. For the retaining wall shown below, the foundation and the backfill soils have the same properties. Use Rankine analysis to calculate the following: 100 kN/m² (a) Calculate the active lateral earth pressures distribution. (b) Determine the FS against sliding NOT TO SCALE (c) Determine the FS against overturning. SAND: 118 kN/m² 6-30; 8=37. c0 pd concrese 2m