Secant pile wall - Revision history

Designing Buildings at 09:14, 23 November 2022

2022-11-23T09:14:44Z

← Older revision		Revision as of 09:14, 23 November 2022
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	* Screw pile foundations.		* Screw pile foundations.
	* Sheet piles.		* Sheet piles.
		+	* Types of pile foundation.

	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]		[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]

Editor at 18:48, 4 November 2021

2021-11-04T18:48:12Z

← Older revision		Revision as of 18:48, 4 November 2021
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	The disadvantages are that vertical tolerances may be difficult to achieve for deep piles, as is total waterproofing in the joints between piles. They will also generally cost more than sheet piles.		The disadvantages are that vertical tolerances may be difficult to achieve for deep piles, as is total waterproofing in the joints between piles. They will also generally cost more than sheet piles.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings =
−		+
−	=== Related articles on Designing Buildings ~~Wiki ==~~=	+

	* Bored piles.		* Bored piles.
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	* Pile foundations.		* Pile foundations.
	* Piled raft foundation.		* Piled raft foundation.
		+	* Pile wall.
	* Piling equipment.		* Piling equipment.
	* Screw pile foundations.		* Screw pile foundations.

Designing Buildings at 08:40, 22 September 2020

2020-09-22T08:40:16Z

← Older revision		Revision as of 08:40, 22 September 2020
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	{\|		{\|
−	\| [[File:~~Secant pile wall~~.jpg]]	+	\| [[File:Secant_pile_wall.jpg\|link=File:Secant_pile_wall.jpg]]
	\|-		\|-
	\| Image source: [https://www.flickr.com/photos/mtacc-esa/6354699417 MTA Capital Construction].		\| Image source: [https://www.flickr.com/photos/mtacc-esa/6354699417 MTA Capital Construction].
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	* Sheet piles.		* Sheet piles.

−	[[Category:Construction_techniques]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]

Designing Buildings at 17:41, 19 January 2018

2018-01-19T17:41:24Z

← Older revision		Revision as of 17:41, 19 January 2018
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		+	{\|
		+	\| [[File:Secant pile wall.jpg]]
		+	\|-
		+	\| Image source: [https://www.flickr.com/photos/mtacc-esa/6354699417 MTA Capital Construction].
		+	\|}
		+
	Piles are long, slender, columnar elements that can be driven into the ground to provide stability, such as in foundations. They are typically made from steel or reinforced concrete, or sometimes timber.		Piles are long, slender, columnar elements that can be driven into the ground to provide stability, such as in foundations. They are typically made from steel or reinforced concrete, or sometimes timber.

Designing Buildings at 17:35, 19 January 2018

2018-01-19T17:35:25Z

← Older revision		Revision as of 17:35, 19 January 2018
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−	~~Pile foundations~~ are ~~deep foundations, formed by~~ long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber~~. A foundation is described as 'piled' when its depth is more than three times its breadth (Atkinson, 2007)~~.	+	Piles are long, slender, columnar elements that can be driven into the ground to provide stability, such as in foundations. They are typically made from steel or reinforced concrete, or sometimes timber.

	Pile walls can be used to create permanent or temporary retaining walls. They are formed by placing piles directly adjacent to one another. Pile walls can be either closely-spaced contiguous piles walls or secant pile walls.		Pile walls can be used to create permanent or temporary retaining walls. They are formed by placing piles directly adjacent to one another. Pile walls can be either closely-spaced contiguous piles walls or secant pile walls.
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	Secant pile walls are formed by constructing reinforced concrete piles that interlock, and are often used as a cost-effective solution when short-term water retention is required. Secant piles are reinforced with either steel rebar or steel beams.		Secant pile walls are formed by constructing reinforced concrete piles that interlock, and are often used as a cost-effective solution when short-term water retention is required. Secant piles are reinforced with either steel rebar or steel beams.

−	~~To ensure that the piles are located accurately to enable the correct interlock to be cut into adjacent piles~~, ~~a guide wall is generally required. Construction then proceeds in sequence, with~~ primary (female) piles ~~being~~ cast in situ, leaving ~~enough~~ space in between. This is followed by secondary (male) piles being cut into the primary piles to form a continuous wall, with a typical interlock of 150 mm~~. Segments of the primary piles are cut using high torque drill rigs and specially-designed cutting tools~~.	+	Typically, primary (female) piles are cast in situ, leaving space in between them. This is followed by secondary (male) piles being cut into the primary piles to form a continuous wall, generally with a typical interlock of around 150 mm.

−	Depending on the composition of the secondary piles, it can be hard/soft, hard/firm or hard/hard~~. Hard/soft uses a ‘soft’ cement-bentonite mix (typically 1 N/mm2) for the primary pile, and this is usually unreinforced. This composition generally doesn’t provide full water-tightness.~~	+	Depending on the composition of the secondary piles, it can be hard/soft, hard/firm or hard/hard:

−	Hard/firm uses a weak mix concrete or full-strength mix concrete (typically 10 N/mm2). If the project requires the pile walls to be used for permanent works, a reinforced concrete lining may be required.	+	* Hard/soft uses a ‘soft’ cement-bentonite mix (typically 1 N/mm2) for the primary pile, and this is usually unreinforced. This composition generally does not provide full water-tightness.
		+	* Hard/firm uses a weak mix concrete or full-strength mix concrete (typically 10 N/mm2). If the project requires the pile walls to be used for permanent works, a reinforced concrete lining may be required.
		+	* Hard/hard is similar to hard/firm but the primary piles are typically of higher-strength concrete and may be reinforced. This can provide an alternative to diaphragm wall construction.

−	~~Hard/hard is similar to hard/firm but the primary piles are typically~~ of ~~higher-strength concrete and may be reinforced. As this option is constructed entirely of structural reinforced concrete~~, ~~the lining is not required. It~~ can provide ~~an alternative to diaphragm~~ wall ~~construction~~.	+	The advantages of secant pile walls are that, compared to sheet piling methods, they can provide greater wall stiffness. They are also capable of being installed in low headroom and in difficult ground conditions.

−	The advantages of secant pile walls are that, compared to sheet pile methods, it can provide increased wall stiffness. They are also capable of being installed in low headroom and in difficult ground conditions.	+	The disadvantages are that vertical tolerances may be difficult to achieve for deep piles, as is total waterproofing in the joints between piles. They will also generally cost more than sheet piles.
−		+
−	The disadvantages are that ~~verticality~~ tolerances may be difficult to achieve for deep piles, as is total waterproofing in the joints between piles~~, as well as the increased~~ cost ~~compared to~~ sheet piles.	+

	= Find out more =		= Find out more =

Editor at 13:13, 17 January 2018

2018-01-17T13:13:50Z

← Older revision		Revision as of 13:13, 17 January 2018
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	Pile foundations are deep foundations, formed by long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber. A foundation is described as 'piled' when its depth is more than three times its breadth (Atkinson, 2007).		Pile foundations are deep foundations, formed by long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber. A foundation is described as 'piled' when its depth is more than three times its breadth (Atkinson, 2007).

−	Pile walls can be used to create permanent or temporary retaining walls. They are formed by placing ~~[https://www.designingbuildings.co.uk/wiki/Piles~~ piles] directly adjacent to one another. Pile walls can be either closely-spaced contiguous piles walls or secant pile walls.	+	Pile walls can be used to create permanent or temporary retaining walls. They are formed by placing piles directly adjacent to one another. Pile walls can be either closely-spaced contiguous piles walls or secant pile walls.

	Secant pile walls are formed by constructing reinforced concrete piles that interlock, and are often used as a cost-effective solution when short-term water retention is required. Secant piles are reinforced with either steel rebar or steel beams.		Secant pile walls are formed by constructing reinforced concrete piles that interlock, and are often used as a cost-effective solution when short-term water retention is required. Secant piles are reinforced with either steel rebar or steel beams.

Editor: Created page with "Pile foundations are deep foundations, formed by long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber. A foundation is described..."

2018-01-17T13:13:38Z

Created page with "Pile foundations are deep foundations, formed by long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber. A foundation is described..."

New page

Pile foundations are deep foundations, formed by long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber. A foundation is described as 'piled' when its depth is more than three times its breadth (Atkinson, 2007).

Pile walls can be used to create permanent or temporary retaining walls. They are formed by placing [https://www.designingbuildings.co.uk/wiki/Piles piles] directly adjacent to one another. Pile walls can be either closely-spaced contiguous piles walls or secant pile walls.

Secant pile walls are formed by constructing reinforced concrete piles that interlock, and are often used as a cost-effective solution when short-term water retention is required. Secant piles are reinforced with either steel rebar or steel beams.

To ensure that the piles are located accurately to enable the correct interlock to be cut into adjacent piles, a guide wall is generally required. Construction then proceeds in sequence, with primary (female) piles being cast in situ, leaving enough space in between. This is followed by secondary (male) piles being cut into the primary piles to form a continuous wall, with a typical interlock of 150 mm. Segments of the primary piles are cut using high torque drill rigs and specially-designed cutting tools.

Depending on the composition of the secondary piles, it can be hard/soft, hard/firm or hard/hard. Hard/soft uses a ‘soft’ cement-bentonite mix (typically 1 N/mm2) for the primary pile, and this is usually unreinforced. This composition generally doesn’t provide full water-tightness.

Hard/firm uses a weak mix concrete or full-strength mix concrete (typically 10 N/mm2). If the project requires the pile walls to be used for permanent works, a reinforced concrete lining may be required.

Hard/hard is similar to hard/firm but the primary piles are typically of higher-strength concrete and may be reinforced. As this option is constructed entirely of structural reinforced concrete, the lining is not required. It can provide an alternative to diaphragm wall construction.

The advantages of secant pile walls are that, compared to sheet pile methods, it can provide increased wall stiffness. They are also capable of being installed in low headroom and in difficult ground conditions.

The disadvantages are that verticality tolerances may be difficult to achieve for deep piles, as is total waterproofing in the joints between piles, as well as the increased cost compared to sheet piles.

= Find out more =

=== Related articles on Designing Buildings Wiki ===

* Bored piles.
* Caisson.
* Diaphragm wall.
* Driven piles.
* Foundations.
* Micropiles.
* Pile foundations.
* Piled raft foundation.
* Piling equipment.
* Screw pile foundations.
* Sheet piles.

[[Category:Construction_techniques]]