heave
- The act or effort of raising or lifting something: with a great heave hauled the fish onto the deck.
- An act of hurling; a throw, especially when considered in terms of distance: a heave of 63 feet.
- Geology a. ...
- An upward movement, especially of a ship or aircraft.
- The act or an instance of gagging or vomiting.
What is heaving in geology?
(Geological Science) the horizontal displacement of rock strata at a fault 1. to raise or lift with effort or force; hoist: to heave a heavy ax. 2. to throw, esp. to lift and throw with effort or force: to heave a stone through a window. 3. Naut. to move into a certain position or situation. 4. to utter laboriously or painfully: to heave a sigh.
What is a heave?
An act of hurling; a throw, especially when considered in terms of distance: a heave of 63 feet. 3. Geology a. A horizontal dislocation, as of a rock stratum, at a fault. b. An upward movement of a surface, especially when caused by swelling and expansion of clay, removal of overburden, or freezing of subsurface water. 4.
What is ground heave?
Ground heave is the opposite of subsidence, which is when the ground sinks. This guide tells you all you need to know about heave. What causes heave? Heave is usually the result of clay soils expanding due to an increase in moisture levels.
What is the meaning of floor heave?
Definition and formation: Floor heave is the relative rise of a clay-rich mine floor after a passage (entry, roadway, etc.) has been cut underground (Wuest, 1992). Floor heave occurs when the load on the floor exceeds the bearing capacity of the floor.
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What are heave on faulting?
The amount of lateral movement of the strata at a fault. The fault throw and heave are essential elements of a fault and form basic values when exploring and driving to recover the disrupted coal seam.
What is heave in soil mechanics?
Heave is the upward movement of a foundation or slab caused by expanding or swelling of the clay soils due to an increase in moisture. Although heave can been seen in foundations, it is often a problem for slabs because the weight of your home on the foundation is fully in effect.
What is throw and heave?
In measuring the horizontal or vertical separation, the throw of the fault is the vertical component of the separation and the heave of the fault is the horizontal component, as in "Throw up and heave out".
What is heave in construction?
Heave is the upward movement of a foundation or slab caused by underlying soils that expand or swell. This occurs due to an increase in moisture or by freezing forces. Heave is more common with slabs than foundations because slabs have less weight to resist heaving forces.
How do you identify a heave?
How to spot heave and subsidenceCracks in brickwork, and near doors and windows.Doors and windows sticking as their frames become out of place.Evidence of rising damp in the walls. ... External cracking reflected internally in the same area of a cavity wall.Crumpling of wallpaper between the wall and ceiling.More items...
What is the difference between heave and subsidence?
Subsidence and heave both affect a building's foundations. Subsidence is the downward movement of those foundations, whereas heave is the upward. Both can cause internal and external issues, as a property sinks or shifts in response to impacts on the earth beneath.
What is the difference between throw and heave in geology?
The sense of slip (main sense of movement) is defined by the relative movements of geological features present on either side of the fault plane. The sense of slip defines the type of fault. This is distinct from the throw of the fault, which is the vertical offset. Heave is the measured horizontal offset of the fault.
What are the 3 fault types?
There are three main types of fault which can cause earthquakes: normal, reverse (thrust) and strike-slip.
What are the 6 types of faults?
Types of Faults:Normal Fault: A fault in which Hanging wall (HW) has apparently come down with respect to the Footwall (FW) is termed as 'Normal Fault'.Reverse Fault: ... Thrust Fault: ... Vertical Fault: ... Horst Fault: ... Graben Fault or Rift Fault or Trench fault:
What causes concrete to heave?
Concrete will heave when the ground beneath it shifts. One of the most common reasons, as stated earlier, is ground changes due to freezing and thawing. If the ground below concrete becomes moist and freezes, it will expand upward and cause heaving.
What is heave and settlement?
ABSTRACT. Heave, subsidence and settlement are all descriptions of soil movement that commonly affect residential and other lightly loaded foundations. Laypeople in the local foundation industry commonly refer to all three movement types as simply “settlement”.
What are the signs of ground heave?
Common signs of ground heave may include:Cracking to brickwork and windows. This cracking is more likely to be vertical, whereas subsidence cracking is more likely to be diagonal.Doors sticking as their frames become out of square.Lifting of paths and patios surrounding buildings.
Why does heaving occur?
When heaving occurs as described above an object or structure imbedded in the ground that is not properly anchored will be forced upward when an ice lens preferentially forms beneath the object. In most cases the structure does not return to its original position when the frozen soil seasonally thaws.
What is heaving in drilling?
Heaving occurs when the ground ahead of a pipe jack or directional drill is lifted up, causing a bulge on the surface. Heaving can cause damage to existing utility structures above the excavation path. Trenchless technology utilizes methods that excavate under the surface of the earth without the need for excavation.
What causes slab heave?
Slab heave is a result of uneven movement of a house footing and slab. Uneven changes in ground moisture can also lead to slab heave, where clay soils swell (and expand) when they become wet, and shrink when they dry out.
How is heave fixed?
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. Where the soil itself is prone to heave, underpinning may be necessary to stabilise structures.
What is the meaning of "heave"?
1. The act or effort of raising or lifting something : with a great heave hauled the fish onto the deck. 2. An act of hurling; a throw, especially when considered in terms of distance: a heave of 63 feet. 3. Geology. a. A horizontal dislocation, as of a rock stratum, at a fault. b.
What does "heave" mean in sailing?
5. heave - move or cause to move in a specified way, direction, or position; "The vessel hove into sight".
What does "heave a sigh" mean?
3. to utter (sounds, sighs, etc) or breathe noisily or unhappily: to heave a sigh. 4. to rise and fall or cause to rise and fall heavily. 5. (Nautical Terms) ( past tense and past participle hove) nautical. a. to move or cause to move in a specified way, direction, or position: to heave in sight.
What does "hover up" mean?
a. To raise or haul up by means of a rope, line, or cable: hove the anchor up and set sail.
What does "hover" mean in nautical terms?
a. To raise or haul up by means of a rope, line, or cable: hove the anchor up and set sail. b. To move (a ship) in a certain direction or into a certain position by hauling: hove the ship astern. 6. To make rise or swell: the wind heaving huge waves; an exhausted dog heaving its chest. 7.
When does floor heave occur?
Floor heave can be slow or rapid. It can occur during mining, or long after a passage is mined through. Rockaway and Stephenson (1980) described three types of failure mechanisms: General shear failure occurs when the floor is relatively competent, but pillar load is too great for the floor, resulting in the development ...
What are some examples of floor heave?
A. Clay floor rising against coal rib in a side passage. B. Detail of base of rib, showing shearing of the coal. C . Sealed side passage where floor has risen to roof. Note kink in the roof. Wood header on roof bolt (white arrow) for scale.
What happens if floor heave is not addressed?
If floor heave is not addressed, pillars and roof may fail, which will redistribute overburden load to surrounding pillars , which can cause failure to spread (Rockaway and Stephenson, 1980).
What is floor heave in Illinois?
In Illinois, floor heave is also locally associated with channel margin conditions (Nelson, 1983). Strong roofs such as sandstones (associated with paleochannels) above areas of floor heave can exert pressure on adjacent pillars .Floor heave can also be accentuated beneath shallow cover and beneath Pleistocene valleys (Nelson, 1983).
What is the term for the rise of the floor in a mined passage?
The resulting rise of the floor, sometimes to the top of the mined passage, is also termed “squeeze. ”. Failure of the floor may begin with arching in the center of a heading between pillars, or along the rib, but progresses with breaking and upward buckling/rising of the floor across the entry (Wuest, 1992). Floor heave can be slow or rapid.
Where roof falls occur above areas of floor heave, supplemental support methods generally are similar to those for answer?
Roof support: Where roof falls occur above areas of floor heave, supplemental support methods generally are similar to those for weak conditions in the rock type or rock-stacking type in the roof (e.g., weak shale roofs, stackrock, etc.), depending on severity, including cribbing, as shown in the example above.
Can roof fall occur long after mining?
Roof falls above areas of floor heave can occur long after mining, and have resulted in surface subsidence in Illinois (Chugh, 1986a, b; Bauer, 2013).
What does "heave" mean?
Definition of heave. 4 a : to cause to swell or rise a spent horse gasping and heaving his chest Frost had heaved the sidewalk. 1 a : to rise and fall rhythmically The boat heaved up and down on the waves. 3 : to rise or become thrown or raised up Roads had begun to heave with frost.
What does "heave" mean in a sentence?
Definition of heave (Entry 2 of 2) 1 a : an effort to pull or raise something with each heave of the rope. b : an act or instance of throwing : hurl gave the ball a heave toward the basket. 2 : an upward motion : rising especially : a rhythmical rising the heave of his chest.
What does "heaved the sidewalk" mean?
4 a : to cause to swell or rise a spent horse gasping and heaving his chest Frost had heaved the sidewalk. 1 a : to rise and fall rhythmically The boat heaved up and down on the waves. 3 : to rise or become thrown or raised up Roads had begun to heave with frost.
