The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry …
اقرأ المزيد
The present invention is directed to a pulsed electric-field system, apparatus and method for the effective disinfecting and dewatering previously-dewatered, biologically active waste-water sludges (e.g., municipal waste-water sewage sludge) in an efficient manner, so as to dramatically reduce the resulting volume of the inert waste material which has to be …
اقرأ المزيد
Construction dewatering from open excavation or trenches can be done by several methods. However, the most simple of all is the gravity drain using drainage channels carrying away water from the area to be worked to the discharge point. Other feasible ways for dewatering are water pumping, siphoning, or using large construction …
اقرأ المزيد
Methods of Dewatering Used In Construction 1. Sumps and Ditches 2. Shallow Well System 3. Deep Well System or Bored Well System 4. Well Point System 5. Vacuum …
اقرأ المزيد
A dewatering system built onto trench shoring boxes and equipment for removing and pumping ground water from ditches or trenches excavated to install underground utility pipes and equipment. Ground water is pulled from the trench bottom by the dewatering system through slotted openings at the bottom of the trench shoring …
اقرأ المزيد
Dewatering is defined by the MPCA Construction Stormwater General Permit as "the removal of surface or ground water to dry and/or solidify a construction site to enable construction activity." Dewatering usually involves using a pump to drain a trench, pit, or other low area, and can be conducted with several devices and treatments.
اقرأ المزيد
Thrust boring is the trenchless method of boring a pilot hole through a short underground distance. While the process may be merely driving a closed-ended pipe through the earth, workers often employ cutting heads followed by a pipe sleeve.The sleeve works to stabilize the hole, which makes it ideal for high-risk borehole projects.
اقرأ المزيد
Wastewater treatment - Dewatering, Filtration, Disinfection: Digested sewage sludge is usually dewatered before disposal. Dewatered sludge still contains a significant amount of water—often as much as 70 percent—but, even with that moisture content, sludge no longer behaves as a liquid and can be handled as a solid material. Sludge-drying beds provide …
اقرأ المزيد
Dewatering may be accomplished by lowering the groundwater table before the excavation is begun. This method of dewatering is often used for placing pipelines in areas with high groundwater levels. Alternatively, excavation may be accomplished first and the water simply pumped out of the excavation as work proceeds.
اقرأ المزيد
ten requires dewatering. The importance of preparing the foundation as specified cannot be overemphasized. The inspector must be familiar with the lines, grades, and typical sections shown on the drawings; the speci-fications that control the work; and with the layout or staking of the work. The inspector must carefully re-
اقرأ المزيد
Methods & Benefits. Dewatering is the process of removing groundwater or surface water from a construction site using dewatering systems. The pumping process pumps water up through wells, wellpoints, eductors, or sumps installed in the ground. Temporary and permanent solutions are available.
اقرأ المزيد
Wellpoint. The wellpoint method of dewatering involves a series of small-diameter wells being spaced close to one another in the area where water is to be removed. The wells are arranged in a line alongside the excavation or a ring around the site. Each of these small wells called a "wellpoint," is connected to the suction side of a water ...
اقرأ المزيد
3. Wooded buffer should be used in dewatering, if possible. 4. Select a proper area for water discharge. 5. If possible, the water from the construction site should be discharged and directed to a forest buffer zone. 6. Channels to be used for dewatering must be stable and protected with grass or vegetation. 7.
اقرأ المزيد
We claim: 1. A method for dewatering bituminous and anthracite coal fines, comprising the steps of: adding to a mixture comprised of water and a hydrophobic coal selected from the group consisting of bituminous coal fines and anthracite coal fines, a quantity of at least one hydrophobic compound which is in a gaseous state under …
اقرأ المزيد
Complete Patent Searching Database and Patent Data Analytics Services.
اقرأ المزيد
There are four important dewatering methods one should be aware of: Wellpoint method of dewatering, Eductor wells, Open sump pumping and Deep wellpoint method Wellpoint Method of Dewatering Excavations 1) …
اقرأ المزيد
Dewatering methods to control groundwater are categorized into two groups: (i) Pumping methods where groundwater is pumped from an array of wells or sumps located in or around the excavation to temporarily lower groundwater levels (Fig. 1a ). (ii) Exclusion methods that use low permeability cut-off walls to exclude groundwater …
اقرأ المزيد
Dewatering is the process of removing groundwater and superficial water from a construction site. Usually, this procedure is carried out before excavations, or to lower the water table on site. Dewatering methods can use pumps or evaporation. Removing water from construction sites is important to protect materials and to keep a safe workplace.
اقرأ المزيد
analysis methods (i.e., mathematical formulas method, flow net method, and numerical modeling method) and the measured drawdown for four cases of dewatering systems
اقرأ المزيد
July 12, 2023. Dewatering is the process of removing groundwater and surface water from an excavated site. It's crucial to perform dewatering to create dry and stable soil before construction begins. Although natural evaporation helps remove some groundwater, dewatering pumps with large air-handling capacity assist in most water removal ...
اقرأ المزيد
Using geotextile tubes as dewatering technology may significantly contribute to sustainable treatment of sludge generated in different industries, such as the water industry. This is an economical …
اقرأ المزيد
McLanahan offers a broad range of dewatering equipment that uses these methods to process sands, coal, pulp and paper, concrete and other minerals and materials in the mining industry, as well as for dewatering …
اقرأ المزيد
Construction dewatering is the removal of water from the ground in order to dry out an area so that construction can take place. It is an important process that needs …
اقرأ المزيد
Wellpoint Method of Dewatering Excavations. 1) A series of wells of required depth are created in the vicinity of the excavated area from where the water has to be pumped out. The wells are arranged either in a line or a rectangular form where the wellpoints are created at a distance of at least 2m from each other.
اقرأ المزيد
Dewatering is the process of removing water from solid material or soil by wet classification, centrifugation, filtration, or similar solid-liquid separation processes. This process is often used in the construction industry to remove water from hardened concrete, soil, or other materials and enable the reuse of construction materials.
اقرأ المزيد
1.4 METHODS FOR DEWATERING AND PRESSURE RELIEF and their suitability for various types of excavations and soil conditions are described in the technical literature. The investigation of factors relating to groundwater flow and to design of dewatering systems are discussed in the technical literature. Mathematical, graphical,
اقرأ المزيد
stability of the slope excavation. Pumping is done through wells dewatering (dewatering well or well point) or ducts by using a submersible pump. Thus the basement excavation can be done properly. This study is to determine the method of implementation of the work of dewatering the most appropriate methods
اقرأ المزيد
Dewatering System. Dewatering works are required in the project locations when the groundwater table was encountered higher than the formation level or the final excavation level. This is to ensure a dry …
اقرأ المزيد
Dewatering is a necessary step in preparing an area for construction work. You can choose from four major dewatering methods, which include wellpoints, sump pumping, eductor wells, and deep wells. No matter which method you use, you have to follow some rules and regulations, even permits, that apply to construction dewatering, …
اقرأ المزيد
Dewatering provides a dry digging and allows the construction to proceed efficiently. Itreduces lateral load on sheeting and bracing in the excavation. Also, improves the supporting characteristics of foundation materials. This excavation increases the stability of slopes and side-hill fills. It cut off the capillary rise and prevent piping and ...
اقرأ المزيد
Dewatering techniques mainly control the common and complicated problems like groundwater or water logging. Construction dewatering can become a costly issue if overlooked during project planning ...
اقرأ المزيد
The dewatering methods discussed are applicable to certain specific soil conditions and excavations sizes. Figure 8 shows their suitability for various soil types. As seen from Figure 8, methods involving well and wellpoint systems are used where the soil to be pumped are predominantly sand and gravel. Freezing may be used in the same soils.
اقرأ المزيد
1. Dewatering By Open Sump Pumping. It's a reliable choice in a wide range of situations, and it's also referred to as the simplest, cheapest, and most effective dewatering method. A sump is a hole or an area in the ground (deeper than the basement floor) where water is collected and then pumped away for disposal. How it works.
اقرأ المزيد
160+ million publication pages. 2.3+ billion citations. Content uploaded by Moamen Abd El Raouf.
اقرأ المزيد
Drainage galleries are not a common method for dewatering due to the associated high cost. It can be defined as ring tunnels intersecting and these galleries are used to remove water with ...
اقرأ المزيد
