Search results
SystmOnline can be accessed here. For those wanting to access SystmOnline content via their smartphone, we recommend downloading Airmid. If you have used SystmOnline previously, you can use the same login details to access Airmid. Alternatively, you can logon using NHS Login. If you are a patient looking to learn more about Airmid or need help ...
- Dissolution
- Collapse
- Dissolution and Collapse
- Erosion
- Further Information
Some sinkholes result from the surface dissolution of soluble rock. For example, limestone rocks dissolve when attacked by rainfall or groundwater that is acidic.
Collapse dolines occur as consequence of the gradual collapse of a cave passage at depth. The collapse may gradually propagate up through the overlying strata to cause subsidence at the surface (a ‘collapse sinkhole’). These sometimes extend up into rocks that are not themselves prone to dissolution, creating a ‘caprock sinkhole’. Sinkholes of this...
Sinkholes can also form as a result of both dissolution and subsequent collapse. Where a thin covering of loose, superficial material (such as sand, clay or soil) covers the soluble rocks beneath, the soil can be washed into solutionally widened fissures or cavities below. If the cover material is sandy, it will tend to gradually slump into the fis...
Some sinkholes are caused not by dissolution of limestone, but the erosion of weak, unconsolidated material by flowing water. Loose material can removed by a process called ‘soil piping’, creating large voids within the sediment. One of the most spectacular examples of this type of collapse is the event that occurred in May 2010 in Guatemala City. ...
The BGS provides information regarding the susceptibility of the ground to dissolution and mining. This does not include information on the associated likelihood. The likelihood of occurrence is also linked to the history of the development of a site; for example, many sites will have been remediated. Additionally, the distribution of medieval work...
Terefil® is a technology used to create lightweight, cellular concrete for large void fills, used for sinkhole repairs. Terefil® material densities can range from 500 to 1,500 kg/m with strengths ranging from 0.5 to 5 MPa. The material sets within hours of placement, is flowable and self-levelling. Terefil® is routinely used for sinkhole ...
3 days ago · Work to fix a 10ft sinkhole caused by a suspected collapsed sewer pipe will take longer than expected. The void appeared in Hackney Road in the Fant area of Maidstone on July 11 but repairs did ...
Understanding sinkholes and karst. Sinkholes are often saucer-shaped hollows that are the result of some kind of collapse or removal of an underlying layer of rocks that used to support the layer of material at the surface. However, sinkholes can appear in a variety of different shapes and settings depending on the composition of the rocks and ...
It's easy to answer your query online. Visit our Help page to find out how. Welcome to HSBC UK banking products including current accounts, loans, mortgages, credit cards. Also Premier and Advance banking and more….
People also ask
What causes sinkholes?
What is a solution sinkhole?
What is a sinkhole in a rock?
What type of sinkhole is a swallow hole?
Your account. Check your bill, make payments, track your orders and more.
