Ground heave - Revision history

Designing Buildings at 10:40, 2 September 2020

2020-09-02T10:40:02Z

← Older revision		Revision as of 10:40, 2 September 2020
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	* [http://www.financial-ombudsman.org.uk/publications/technical_notes/building-subsidence.htm Financial Ombudsman]		* [http://www.financial-ombudsman.org.uk/publications/technical_notes/building-subsidence.htm Financial Ombudsman]

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

Editor at 08:13, 27 June 2019

2019-06-27T08:13:17Z

← Older revision		Revision as of 08:13, 27 June 2019
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	Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.		Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.

−	Displacement is generally less ~~that~~ 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value.	+	Displacement is generally less than 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value.

	= Causes of ground heave =		= Causes of ground heave =
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	Where the soil itself is prone to heave, underpinning may be necessary to stabilise structures. Excavated soil from beneath existing foundations is replaced with material, usually concrete, in a series of phases to form a new foundation beneath the existing one, reaching down to subsoils that are not prone to heave. It may be necessary to leave a cavity beneath the structure to accommodate future movement of the upper layers of soil.		Where the soil itself is prone to heave, underpinning may be necessary to stabilise structures. Excavated soil from beneath existing foundations is replaced with material, usually concrete, in a series of phases to form a new foundation beneath the existing one, reaching down to subsoils that are not prone to heave. It may be necessary to leave a cavity beneath the structure to accommodate future movement of the upper layers of soil.

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

	* Brownfield land.		* Brownfield land.

Editor: Reverted edits by 36.229.242.115 (talk) to last revision by Editor

2019-06-27T08:11:32Z

Reverted edits by 36.229.242.115 (talk) to last revision by Editor

← Older revision		Revision as of 08:11, 27 June 2019
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	Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.		Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.

−	Displacement is generally less that 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value. ~~( lol what this source is not reliable at all, don't use this website to cite your source )~~	+	Displacement is generally less that 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value.

	= Causes of ground heave =		= Causes of ground heave =
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	* [http://www.financial-ombudsman.org.uk/publications/technical_notes/building-subsidence.htm Financial Ombudsman]		* [http://www.financial-ombudsman.org.uk/publications/technical_notes/building-subsidence.htm Financial Ombudsman]

−	~~[[Category:Articles_needing_more_work]]~~ [[Category:Construction_techniques]]	+	[[Category:Construction_techniques]]

36.229.242.115 at 07:11, 27 June 2019

2019-06-27T07:11:49Z

← Older revision		Revision as of 07:11, 27 June 2019
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	Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.		Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.

−	Displacement is generally less that 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value. lol what	+	Displacement is generally less that 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value. ( lol what this source is not reliable at all, don't use this website to cite your source )

	= Causes of ground heave =		= Causes of ground heave =

36.229.242.115 at 07:09, 27 June 2019

2019-06-27T07:09:48Z

← Older revision		Revision as of 07:09, 27 June 2019
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	Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.		Ground heave is the upward movement of the ground usually associated with the expansion of clay soils which swell when wet. As the soil generally cannot expand downwards or sideways, the result is that the exposed upper surface of the soil rises up. The impact of heave is opposite to the effect of subsidence which is where soil is unstable and sinks downward, or settlement which is caused by the weight of a building.

−	Displacement is generally less that 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value.	+	Displacement is generally less that 150 mm, however, even this level of movement can lead to serious structural damage to building foundations and fabric. Long-term damage could be incurred that may not be detected for some time, but can significantly affect a property’s value. lol what

	= Causes of ground heave =		= Causes of ground heave =

36.229.242.115 at 07:09, 27 June 2019

2019-06-27T07:09:13Z

← Older revision		Revision as of 07:09, 27 June 2019
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	* [http://www.financial-ombudsman.org.uk/publications/technical_notes/building-subsidence.htm Financial Ombudsman]		* [http://www.financial-ombudsman.org.uk/publications/technical_notes/building-subsidence.htm Financial Ombudsman]

−	[[Category:Construction_techniques]]	+	[[Category:Articles_needing_more_work]] [[Category:Construction_techniques]]

Editor at 12:11, 4 May 2018

2018-05-04T12:11:09Z

← Older revision		Revision as of 12:11, 4 May 2018
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	* Groundworks.		* Groundworks.
	* Latent defects.		* Latent defects.
		+	* Lateral loads.
	* Remedial works.		* Remedial works.
	* Settlement.		* Settlement.

Editor at 15:07, 3 May 2018

2018-05-03T15:07:07Z

← Older revision		Revision as of 15:07, 3 May 2018
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	* Ground anchor.		* Ground anchor.
	* Ground conditions.		* Ground conditions.
		+	* Ground improvement techniques.
	* Groundworks.		* Groundworks.
	* Latent defects.		* Latent defects.

Editor at 13:56, 17 April 2018

2018-04-17T13:56:31Z

← Older revision		Revision as of 13:56, 17 April 2018
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	Surveys will indicate whether heave has occurred that may impact upon a building, and may advise, for example, on the potential risks of proposed works such removing trees near buildings. Investigations may include visual inspection, historic research and drilling boreholes to determine the moisture profile of the soil.		Surveys will indicate whether heave has occurred that may impact upon a building, and may advise, for example, on the potential risks of proposed works such removing trees near buildings. Investigations may include visual inspection, historic research and drilling boreholes to determine the moisture profile of the soil.

−	Where heave is likely to be a problem, cellular structures may be installed beneath foundations and floor slabs to reduce the upward force of heave from transmitting to the structure above.	+	Where heave is likely to be a problem, cellular structures may be installed beneath foundations and floor slabs to reduce the upward force of heave from transmitting to the structure above. For more information, see Cellular raft foundation.

	Remedying damage due to ground heave can be a lengthy and expensive process. Where heave is the result of an underlying problem, remedial works such as repairing leaking drains or removing vegetation may resolve the problem.		Remedying damage due to ground heave can be a lengthy and expensive process. Where heave is the result of an underlying problem, remedial works such as repairing leaking drains or removing vegetation may resolve the problem.
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	* Brownfield land.		* Brownfield land.
		+	* Cellular raft foundation.
	* Contaminated land.		* Contaminated land.
	* Cracking and building movement.		* Cracking and building movement.

Editor at 14:57, 10 April 2018

2018-04-10T14:57:31Z

← Older revision		Revision as of 14:57, 10 April 2018
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	* Tree root subsidence.		* Tree root subsidence.
	* Underpinning.		* Underpinning.
		+	* Uplift force.
	* Why do buildings crack? (DG 361).		* Why do buildings crack? (DG 361).