Lecture 5- Earthwork Construction II

Lecture 5- Earthwork Construction II - C E M 6 2 C o n s t...

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Unformatted text preview: C E M 6 2 C o n s t r u c t i o n M e t h o d s CEM 602 Construction Methods Lecture 5- Earth Retaining Structures 1 L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s C E M 6 2 C o n s t r u c t i o n M e t h o d s Types of Earth Retaining Structures L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 2 C E M 6 2 C o n s t r u c t i o n M e t h o d s Steel Sheet Piling • Steel sheet pilling is made of rolled shapes with special joints to act as interlocks between sections • For temporary Retaining structures Z sections or deep-web sections are used • Greatest advantages achieved when water level is high and soil can’t predrained • Steel sheeting is driven into position with conventional driving equipment before excavation L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 3 C E M 6 2 C o n s t r u c t i o n M e t h o d s Steel Sheet Piling L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 4 C E M 6 2 C o n s t r u c t i o n M e t h o d s Steel Sheet Piling L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 5 C E M 6 2 C o n s t r u c t i o n M e t h o d s Steel Sheet Piling L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 6 • To be most effective, sheet piling should be driven to an impermeable layer or with sufficient penetration below excavation • Sheet piling loses effectiveness – When interlocks are torn – Not driven to proper penetration • Often desirable to pull out after the structure is no longer needed • Driven in waves and sheet should be no more that 5-6 ft below the adjacent C E M 6 2 C o n s t r u c t i o n M e t h o d s Soldier Piles and Horizontal Sheeting • Composed of vertical members called soldier piles installed in advance to below excavation level • Horizontal wood members installed between soldiers as excavation proceeds • Soldiers are generally 6-10 ft center to center • Soldier piles could be made of: – Rolled sections (Wide Flange) – Fabricated Sections L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 7 C E M 6 2 C o n s t r u c t i o n M e t h o d s Soldier Piles and Horizontal Sheeting L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 8 C E M 6 2 C o n s t r u c t i o n M e t h o d s Soldier Piles and Horizontal Sheeting L e c t u r e 5- E a r t h R e t a i n i n g S t r u c t u r e s 9 • Horizontal sheeting could be made of wood, steel, or concrete planks • There is disagreement on which components carry the load – The soldier piles – Horizontal Sheeting • In placing the sheeting 1.5-2 in spaces are left between planks (called louvers) • Louvers are created with wood blocks in between sheets C...
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This note was uploaded on 03/17/2012 for the course CEM 602 taught by Professor Amrkandile during the Spring '10 term at American University in Cairo.

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Lecture 5- Earthwork Construction II - C E M 6 2 C o n s t...

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