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JP2003176529 |
To provide a method for lowering the water permeability for the purpose of spring water prevention of the sand ground or gravel ground and improvement of the weak ground.Two or more kinds of aqueous solutions which permeate easily into t...
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JP2003171940 |
To provide a construction method of an artificial low water permeable layer adopted as a kind of underground water level lowering construction method at underground work of the large depth in the sand ground or the gravel ground having a...
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JP3440065 |
To provide a sandbag, swelling when contacting with water to serve water shielding function, decreasing in weight and thickness, giving no damage to environment after usage, and facilitating waste disposal. The sandbag 1 comprises a wate...
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JP2003119793 |
To provide a underwater working method which enables work at a site necessary for work irrespective of a tide level for the working method applicable to work such as welding or the like below the surface of the water for a steel pipe lai...
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JP3410584 |
To conduct operation under the same state as a land even in a great water depth section by sinking a temporary coffering caisson body, in which one side is open, on the foundation of the lower end section of a structural section, drainin...
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JP3406554 |
To provide a ground-water level lowering method with which ground- water level can be lowered efficiently with few collecting and draining facilities when excavation of a deeper area than the ground water level is required, or the area t...
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JP2003013436 |
To provide a system for controlling a groundwater level, which does not pump excessive groundwater from pumping wells, and ensures the safety of construction thereof, and to provide a method for controlling the groundwater level.The syst...
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JP2003013355 |
To obtain a nonwoven fabric for a civil engineering material having a soil-withstanding strength and in-plane flow performance of fixed levels or above, capable of shortening the shortest banking application possibility period.Polyester ...
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JP3387436 |
To provide a temporary shutoff construction method and a temporary shutoff structure which can reduce both construction cost and a construction period by simplifying installation and removal. In this temporary shutoff construction method...
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JP2002371556 |
To shorten a construction period while preventing the heaving of an excavated bottom face in excavation work for the inside of a temporary cutoff wall installed around a structure in constructing the structure such as a bridge pier. In t...
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JP2002348897 |
To provide a cut-off method of a working box unnecessary for measurement of a working objective or the like in advance and a mechanism for forcedly pushing a cut-off packing against the working objective. The cut-off method of the workin...
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JP2002256546 |
To provide an underground continuous wall execution work support system for performing optimal excavation work by providing information required in accordance with a ground state.A control server 26 is connected to an excavator 10 of res...
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JP2002256538 |
To smoothly and efficiently return water in the ground without clogging the ground by an oxide granular material of dissolved iron in returning the pumped-up water.This method pumps up underground water flowing inside a pumping casing pi...
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JP2002235328 |
To provide a cofferdam method capable of shortening a construction period and reducing a construction cost in a state hardly bringing 4 water pollution.A supporting device 24 is set in the neighborhood of a connecting section between the...
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JP3338909 |
PURPOSE: To provide a simple stratified pumping well capable of separately pumping water from a plurality of aquifers. CONSTITUTION: A drilled hole 31 is formed, so as to penetrate an impermeable layer 1 and reach an aquifer 3 existing u...
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JP3338910 |
PURPOSE: To greatly increase a bending resistance force of the freezed ground so as to the thickness of the freezed ground (freezed area) and to restrain the ground from being expanded by freezing. CONSTITUTION: Freezing pipes 4, 14 and ...
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JP2002227186 |
To provide a sealing structure applicable to other general joint seals than a joint for a steel pipe sheet pile while solving the problems that a waste permeated water flows out of the joint for the steel pipe sheet pile, and its executi...
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JP2002201649 |
To provide a work caisson and its installation method that can form the same dry working space as land in a narrow range without using a pile driving boat or the like, while easily removing the working place and coping with any environme...
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JP3324012 |
PURPOSE: To enable the construction of a permeability-retardant layer quickly and economically. CONSTITUTION: A sheathing wall 1 is constructed in the depth where it reaches a permeable layer 4, an injection pipe 2 having a length arrivi...
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JP3318401 |
PURPOSE: To surely prevent the outflow of a seepage liquid to the outside sea from the reclaimed ground side at a reclamation disposal site or after the completion of reclamation, simplify the facility structure, and facilitate the opera...
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JP2002138461 |
To provide a structure of a diaphragm wall having a function lowering or raising the ground water level, a lowering method of the ground water level making use thereof and a restoration method of the ground water level.The structure of t...
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JP2002121743 |
To provide a ground water lowering method capable of directly discharging ground water from the inside of the ground to artesian aquifer without pumping up on the ground, and a ground water lowering device therefor.This ground water lowe...
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JP3295446 |
PURPOSE: To provide a method for welding and laying a water barrier sheet by efficiently producing the water barrier sheet having a large area on a float by welding to lay the same and to provide a device therefor. CONSTITUTION: A roll-s...
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JP2002097614 |
To provide a sandbag, swelling when contacting with water to serve water shielding function, decreasing in weight and thickness, giving no damage to environment after usage, and facilitating waste disposal.The sandbag 1 comprises a water...
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JP2002088770 |
To improve air leakage recovering efficiency.There are provided an air leakage recovering apparatus 10 consisting of first and second air leakage recovering filters 22 and 24, first and third lifting pipelines 26 and 30, and a lifting me...
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JP3286862 |
PURPOSE: To provide a water stop sheet having excellent weather resistance, chemical resistance, heat resistance, cold resistance, breaking load, sealing property, softness, durability, and workability at the time of execution. CONSTITUT...
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JP2002061279 |
To provide a method for executing cut-off work of water, which eliminates cut-off operation conducted by divers, and exerts high cut-off performance.The cut-off shelter is comprised of a shelter main body 5 having an opening surface faci...
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JP2002038466 |
To provide a connection method of an impervious sheet having a highly impervious property and which can be easily connected and its joint member.The joint part 12 located at the side end of the impervious sheet 2 at the time when it is i...
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JP2002030669 |
To provide a temporary coffering work method and a frame body for temporary coffer capable of performing a temporary coffering with a simple and inexpensive method without using a driving machine so far mandatory in a temporary coffering...
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JP2002030636 |
To provide a reclamation method capable of suppressing ground subsidence after reclamation of the sea and lakes which are soft grounds.In this reclamation method in which water is drained from a closed water area formed by using partitio...
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JP2001323476 |
To provide a cofferdam construction method capable of easily constructing, whithout using any special apparatus, structural body for forming a working environment in dry condition around piers.The cofferdam construction method comprises ...
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JP2001323477 |
To correct the nonconformity of a pumping control system to the nature of ground water.The levels of water in pumping wells W equipped with motor-driven valves 8 positioned at a few points and water in observation wells located at a few ...
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JP3250472 |
To assemble and disassemble a cofferdam construction simply and quickly. This structure 18 is divided along the vertical direction, actually constituted of two box body blocks 20 of the same construction as main structural members, and t...
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JP3250471 |
To assemble and disassemble a cofferdam construction simply and quickly. Box body blocks 20 are arranged so as to be opposite to each other with a bridge pier 12 as the center, fasteningly assembled sandwiching a box body connecting pack...
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JP2001311158 |
To provide a pumping well which can be installed in an underground construction site without hindrance and obviates labor and cost for removal or cutting-down, or the like of the well and further, which prevents deterioration of the wate...
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JP3248146 |
PURPOSE: To insert a water impermeable sheet in a linear groove surely with an extent of surface to a designated depth, to decrease the number of joint parts so as to improve the work efficiency of joint construction and improve water im...
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JP2001303580 |
To provide a temporary shuttering method and structure using a caisson, capable of easily forming a wide working space portion outside a column part, and permitting repair work, etc., for the column part to be carried out well. In the te...
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JP3240394 |
PURPOSE: To increase imperviousness and facilitate the connection work of impervious sheets by making the impervious sheets in double construction and connecting them in a large shaft in which grooves are connected. CONSTITUTION: Multipl...
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JP2001259561 |
To upgrade the water barrier performance and reliability of the water barrier wall by a water stop sheet.In the water barrier wall 1 with a water stop sheet 3 installed in a groove 2 formed underground, a double sheet is used as the wate...
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JP2001214451 |
To provide a ground-water level lowering method with which ground- water level can be lowered efficiently with few collecting and draining facilities when excavation of a deeper area than the ground water level is required, or the area t...
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JP2001214453 |
To provide a method of enclosing underground contaminants by cutoff walls.Movements of ground water where a contaminant 1 is eluted are slowed by installing cutoff walls 3 which surround the contaminant 1 under the ground and do not reac...
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JP2001214452 |
To provide ground-water level lowering method without any restrictions on installing places with which water level lowering can be performed enough even in places where vertical wells are hard to install.Lowering the ground-water level i...
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JP2001207457 |
To perform definite drainage on the job site for an underground structure and also to reduce construction cost.A drain box 1 capable of definitely carry out drainage of underground water to a shallow swamp 15 and preventing water leakage...
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JP2001207444 |
To provide an impervious wall having low permeability and high earthquake resisting performance and facilitating the execution at a low construction cost.Impervious wall is constituted by combining impervious member 10, with hardening wa...
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JP2001200533 |
To provide a small-scale continuous wall construction method and a water seal device used therefor capable of fully placing concrete even to the joint portions of the continuous wall, eliminating concrete portions defectively placed and ...
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JP2001200251 |
To provide a grout which is especially suitable for producing a watertight screen and does not need the addition of a retardant. This grout comprises a mixture containing water, a natural or modified clay, a special blast furnace slag, a...
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JP3200781 |
PURPOSE: To reduce the expense by a method wherein when a landslide protection wall is built, pumped up underground water is reduced to an underground not through a sewerage and a bored hole but through a permeation layer. CONSTITUTION: ...
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JP2001164564 |
To provide an impervious wall for improving an underground continuous wall partitioning the inside and outside of a site in order to prevent the leakage of polluted water from sewage disposal plant or the like.A connecting drainage route...
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JP3195954 |
PURPOSE: To bore a hole and install a drainage pipe in the hole without flowing out sand by only treating water and prevent sand after the installation by using the drainage pipe as a screen pipe and take in only water and perfectly prev...
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JP2001140246 |
To provide a permeability confirmation method of the lower ground of a cylindrical vertical type underground tank capable of easily and properly ensuring imperviousness of an objective ground in accordance with a result of a permeability...
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