Figure 1 shows a cross-section through an excavation in a deep sand deposit. The site engineer determined that the exaction is too deep for a cantilever sheet pile to perform as an economical option and recommended to prop a smaller thickness sheet pile wall by using wooden struts that are spaced 3 m along the length of the wall. You are the office design engineer and are given the sketch below and asked to determine the following:The distribution of the lateral pressure over the wall height.The total force that the retaining wall must resist.The loads (in kN) carried by the individual upper and lower props. **Figure 1** illustrates a cross-section of an excavation in a deep sand deposit. The site engineer has determined that the excavation depth is too deep for a cantilever sheet pile to be a practical option. Instead, it is recommended to use a thinner sheet pile wall supported by wooden struts spaced 3 meters apart along the wall length. As the office design engineer, you are tasked with determining the following based on the sketch provided:i. The distribution of the lateral pressure over the wall height.ii. The total force that the retaining wall must resist.iii. The loads (in kN) carried by the individual upper and lower props.**Diagram Details:**- The wall is propped at two points, each 1.5 meters from the top and bottom, labeled as "Props."- The top layer is 3 meters deep and consists of sand with a unit weight (γ) of 17.5 kN/m³ and an angle of internal friction (φ') of 34°.- The lower layer, 7 meters deep, also consists of sand but has a saturated unit weight (γ_sat) of 19.5 kN/m³ with the same angle of internal friction (φ') of 34°.- The external load applied on top of the wall is \( q = 12 \, \text{kPa} \).

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Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Figure 1 shows a cross-section through an excavation in a deep sand deposit. The site engineer determined that the exaction is too deep for a cantilever sheet pile to perform as an economical option and recommended to prop a smaller thickness sheet pile wall by using wooden struts that are spaced 3 m along the length of the wall. You are the office design engineer and are given the sketch below and asked to determine the following:

The distribution of the lateral pressure over the wall height.
The total force that the retaining wall must resist.
The loads (in kN) carried by the individual upper and lower props.

**Figure 1** illustrates a cross-section of an excavation in a deep sand deposit. The site engineer has determined that the excavation depth is too deep for a cantilever sheet pile to be a practical option. Instead, it is recommended to use a thinner sheet pile wall supported by wooden struts spaced 3 meters apart along the wall length. As the office design engineer, you are tasked with determining the following based on the sketch provided:

i. The distribution of the lateral pressure over the wall height.
ii. The total force that the retaining wall must resist.
iii. The loads (in kN) carried by the individual upper and lower props.

**Diagram Details:**
- The wall is propped at two points, each 1.5 meters from the top and bottom, labeled as "Props."
- The top layer is 3 meters deep and consists of sand with a unit weight (γ) of 17.5 kN/m³ and an angle of internal friction (φ') of 34°.
- The lower layer, 7 meters deep, also consists of sand but has a saturated unit weight (γ_sat) of 19.5 kN/m³ with the same angle of internal friction (φ') of 34°.
- The external load applied on top of the wall is \( q = 12 \, \text{kPa} \).

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