32results about How to "Save engineering expenses" patented technology

The invention provides a method for acquiring density of a rock fill object by using an additive mass method and a digital template chart. The method comprises the following steps: randomly choosing a set of basic measuring points from the rock fill object; performing the additive mass method test and the pit measuring method test on each measuring point and establishing the digital template chart; at different points of the same rock fill object, calculating a natural vibration angular frequency Omega-2 by utilizing a mass of vibration m0 and a dynamic stiffness K acquired by using the additive mass method test; searching for the corresponding volume of vibration V0 from the digital template chart and a moisture content eta 2 on the template chart, by utilizing the K and the Omega-2; and acquiring the density according to a formula. The template chart can be continuously revised and the revised result is continuously converged, thereby increasing the precision of calculating the density of a rock fill object. The method has portability or applicability and can be applied to other engineering, thereby reducing the quantity of pit measuring method and saving the engineering cost.

The invention discloses a hoisting method using three traveling cranes with unequal loads. The three traveling cranes with unequal loads and two girders are taken as hoisting appliances, wherein the hoisting points at the lower ends of the first girder and the second girder are designed according to the rated loads of the traveling cranes and the weight of a hoisted heavy article, and the load percent borne by the three traveling cranes can be required maximumly, so that the safety of hoisting is ensured. Meanwhile, the construction cost is saved and the construction time is shortened.

The invention relates to a device for braking a rail vehicle, comprising a braking element that can be forced against a wheel. The invention is characterized in that the wheel comprises a surface area (6) which is used as a friction ring and against which the braking element can be forced.

The invention discloses a method for jointly decorating maintenance storehouses and installing and constructing pipelines by the aid of movable scaffolds. The method includes constructing first and second inspection pits in the built storehouses; filling the peripheries of the first and second inspection pits with earth in the storehouses; laying two guide rails on the backfilled earth on two sides of each of the first and second inspection pits, sequentially erecting the first, second, third and fourth scaffolds on the guide rail on the outer side of an end of each of the first and second inspection pits, carrying out ceiling plastering, putty applying and paint coating on the scaffolds, and installing the various pipelines, lamps, the firefighting pipelines and electrical equipment on the scaffolds until complete decorating and pipeline installing and constructing procedures are completed in the storehouses. Rollers are respectively installed at the bottoms of the first, second, third and fourth scaffolds. The method has the advantages that indoor ground structural engineering and overhead pipeline and equipment installation engineering such as ceiling decoration engineering, electrical installation engineering, water supply and drainage engineering, firefighting engineering, heating and ventilation engineering can be sequentially constructed in an assembly line manner, accordingly, various construction tasks in profession can be quickly completed, the construction periods can be greatly shortened, and effects of yielding twice the result with half the effort can be realized.

The invention discloses a bending device for snakelike laying of large-section power cables. The bending device comprises a support rod and a pressure rod, wherein a universal joint and a range identifying device are arranged on the support rod; a support seat is arranged at the bottom end of the support rod, and a telescopic joint is arranged at the top end of the support rod; the pressure rod is connected with the support rod through the universal joint; an arc-shaped curved plate is arranged on the pressure rod. Damage of lateral stress and axial stress of the cables during bending to the cables and an operator is effectively eliminated, and personal safety and cable laying in the construction process of engineering are ensured; the bending device can form perpendicular snakelike bends through one-hand operation, input of construction workers is reduced, the working efficiency is effectively improved, the engineering cost is reduced, snakelike laying of the cables meets the technical requirements, and the first pass yield of cable laying quality reaches 100%.

The invention discloses a method for underground replacement of an erector main bearing of a shield tunneling machine. The method comprises the following steps: firstly transporting the bulk parts of a hoisting trolley to a crane span structure, mounting a bearing hoisting tool and a new erector main bearing and conveying to the front part of the crane span structure, and fixedly connecting the front part of the crane span structure with a vertical support of a bearing transportation vehicle; dismantling all pipes and moving the crane span structure backwards; assembling the hoisting trolley and dismounting an erector main bearing mounting seat and a damaged erector main bearing connection bolt; hoisting the damaged erector main bearing by using the hoisting trolley and dismounting an erector rotation ring and the damaged erector main bearing connection bolt; hoisting a new erector main bearing to be assembled with the erector rotation ring, and hoisting the erector main bearing mounting seat to assemble with the main bearing; finally recovering the damaged bearing and connecting the pipes. The method for underground replacement of the erector main bearing of the shield tunneling machine is capable of avoiding silo digging on ground, so that lots of of construction is eliminated, the project progress is greatly improved, and the project expense is reduced.

The invention relates to a compound underflow constructed wetland system, comprising a wetland pool and a wetland bed body. The surface layer of the wetland bed body is covered with small size filler layers. Big size filler layers are arranged from the surface layer to the pool bottom. The wetland bed body is provided with a water inlet pipe and a water collecting tank. The water collecting side of the water collecting tank is a water collecting tracery wall to connect a fine grid, and a water outlet pipe is arranged in the water collecting tank. Wetland plants are distributed on the surface of the wetland bed body. The system is characterized in that a water inlet end and a water outlet end are arranged on the same end of the wetland bed body; the water inlet pipe is a perforated pipe horizontally arranged between the big size filler layers and the small size filler layers along the direction of a short side dam; the water collecting tank and the water inlet pipe are arranged on one side of the water inlet pipe far from the short side dam; a waterproof layer is arranged at the lower inclined part of the wetland bed body along a long side dam; the upper end of the waterproof layeris connected with the bottom of the water collecting tracery wall; the lower end and the back end short side dam and the pool bottom keep a distance; long sides on the two sides are connected with the dam; and the wetland bed body is provided with a gas relief pipe. The system has the advantages that the removal of total nitrogen is improved, the wetland blockage is delayed, the occupation area is reduced, and the high treatment efficiency is realized during operation at a low temperature or in winter.