What can cause a caught between?
” Workers can be caught between hazards. These hazards include cave-ins, other hazards in excavation work, body parts being pulled into unguarded machinery, standing within the swing radius cranes and other construction equipment and being caught between equipment and fixed objects.
Which of the following scenarios would be considered a caught in or caught between incident?
Crushing injuries can occur when an individual is caught between two or more objects. These include being crushed in equipment, between stationary and moving objects, or between two or more moving items.
What can be done to prevent caught between accidents involving rolling equipment?
Here are some tips to avoid being a victim of between/caught-in accidents.
- Hazard recognition. The OSHA-competent person at your company will have done a site analysis for each job.
- Equipment safety.
- Maintain distance.
- Respect barricades.
- Monitor material movement.
What is underpinning and shoring?
Shoring is a general term used in construction. Shoring refers to the process of supporting a structure so that it doesn’t collapse. Shoring can also be used to describe the materials used during the process.
What does dewatering mean?
Dewatering refers to the process of removing groundwater or surface water, such as from a construction site. To allow excavation to take place in dry and stable conditions, water is temporarily pumped from wells or from sumps.
What is permanent dewatering?
The purpose of permanent dewatering, is to keep the water table below a set level. This is done primarily to reduce buoyant forces and secondarily to limit the possibility of leakage into lower-grade areas.
What are the dewatering methods?
We have chosen four common methods: sump pumps, wellpoints and deep wells. These techniques can be used in combination or one-on-one depending on the soil and groundwater conditions.
In which process dewatering is mostly used?
Deepwells Watering Technique: This technique uses a bored well that is pumped with electric submersible pumps to lower groundwater levels below the excavation. Normally, wells are installed in relatively large centres around the perimeter of an excavation.
How does a dewatering system work?
An interior baseboard drainage system is an important part of basement waterproofing and dewatering. This drainage system directs water to a sump pumps, which then drains it away from the home. It protects the home.
What is a dewatering machine?
Dewatering equipment and pumps are used to extract water from liquids, soils or solid materials. Pumps are used to remove liquid from a volume, while dewatering equipment separates water form another material like soil or sludge. Water supply for jetting, sluicing, and other general purposes.
How do you create a dewatering system?
Dewatering system design steps The design of a dewatering network requires that you determine the size, spacing, penetration, and rate of wells or points. This is necessary in order to obtain the groundwater lowering and pressure relief required.
What is the most important factor in designing dewatering systems?
2.1. The design of a dewatering system involves determining the number, size and spacing of wells or point locations, as well as the rate at which water is removed from the strata in order to provide groundwater lowering and pressure relief.
How do you calculate dewatering time?
The Daily Dewatering of the pump shall be less than 5 MGD for exemption GPM x Efficiency x Min/hr x 24 hours=GPD The balance of the total dewatering duration (Total Days of dewatering – initial draw down days) will involve maintenance pumping.
What is deep well dewatering?
Deepwell systems reduce groundwater levels by using a series drilled wells each equipped with an electric submersible pump. WJ designs and installs deepwell systems that maximize drawdown and pump efficiency, while ensuring a discharge without suspended solids.
Which type of pump is used to dewater from deep well?
electric Submersible Bore Hol Pump
When deep well system of dewatering is prepared?
Deep Well Dewatering Multiple wells can lower groundwater levels over large areas beneath excavations.
How does a well point system work?
The wellpoint system is a collection of wellpoints that are usually inserted into their respective positions. A flexible swing joint connects the wellpoints to a common header. Each swing contains a valve that controls the flow of water or air into the header. To maintain a constant vacuum, the header system is connected with a pump.