244 RETAINING WALLS. CHAP. V. 



would cause further difficulty, concrete may be deposited through troughs or other device in the 

 manner designated above. 



40. Cleaning Up. Upon the completion of any section of the work the Contractor shall 

 remove all debris caused by his operations and leave the work ready for backfilling. 



REFERENCES. For the design of reinforced concrete retaining walls, examples of plain 

 and reinforced concrete retaining walls, details of construction, and the theory of reinforced 

 concrete, see the author's "The Design of Walls, Bins and Grain Elevators." For a discussion of 

 the theory of the pressures in granular materials and semi-fluids, see Chapter VIII, Bins, and 

 Chapter IX, Grain Elevators; also see the author's "The Design of Walls, Bins and Grain Ele- 

 vators." 



