201results about How to "Improve construction period" patented technology

The invention discloses a construction process of a double-layer jacking culvert penetrating through existing railway lines. The construction process includes the following steps: (1) precasting of an upper-layer bridge culvert body, (2) construction of a back and a back beam used for jacking of the upper-layer bridge culvert body, (3) reinforcement of the existing railway lines, wherein the existing railway lines are reinforced through a line overhead reinforcing structure, (4) digging of a jacking pit of the upper-layer bridge culvert body, (5) jacking of the upper-layer bridge culvert body, (6) construction of a bottom supporting system of the upper-layer bridge culvert body, (7) detachment of the line overhead reinforcing structure, (8) precasting of a lower-layer bridge culvert body, (9) construction of a back and a back beam used for jacking of the lower-layer bridge culvert body, (10) digging of a jacking pit of the lower-layer bridge culver body, (11) jacking of the lower-layer bridge culvert body, and (12) concrete pouring, wherein after the lower-layer bridge culvert body is jacked properly, concrete is poured between the upper-layer bridge culvert body and the lower-layer bridge culvert body. The method is simple, reasonable in design, low in investment construction cost and good in using effect, the construction process of the double-layer jacking culvert can be easily, conveniently and quickly finished and is high in quality, and the construction process is safe and reliable.

The invention discloses a fabricated frame strip steel bracket long column and a construction method of the fabricated frame strip steel bracket long column. The column body is a composite column consisting of three parts, namely steel pipe outer reinforced concrete, a steel pipe and steel pipe inner concrete; the steel pipe and the steel pipe inner concrete penetrate through the whole long column; the steel pipe inner concrete is subjected to primary prefabrication to form a steel pipe concrete column; concrete at a steel pipe outer joint or total concrete is poured in advance at the second time; a steel bracket is welded with the steel pipe. The long column has the advantages that 1, a multi-layer frame column is manufactured into a long column, the manufacture is simple, and the installation is convenient; 2, the column body is a composite column, the compression bearing capacity and shear capacity of the column are 2-4 times that of a reinforced concrete column with the same section, and the bearing capacity and anti-seismic property of the frame column are obviously improved; 3, the steel bracket is arranged and can be connected with a steel beam or a cast-in-place reinforcedconcrete beam, and the connection is convenient and reliable; and 4, high-strength concrete in the steel pipe is prefabricated in a factory, and the construction cost of the column is greatly reducedcompared with that of a conventional composite column. Therefore, the long column is suitable for various multi-story and high-rise prefabricated buildings and is wide in market prospects.

Provided are blocks for constructing a retaining wall, a prefabricated reinforced earth retaining wall constructed using the blocks, a method for constructing the prefabricated reinforced earth retaining wall. The block for constructing a retaining wall comprises a front surface 10 forming a surface of the retaining wall, and a rear surface 20; left and rights sides 30 and 30' having corresponding intermeshing portions 32 and 32' formed thereon; a top surface 40 having reinforcement member insertion grooves 44 formed in a front-to-rear direction, and fixture grooves 46 formed on either side of the front of the reinforcement member insertion grooves 44 for fixing the reinforcement member or anchor; and a bottom surface 50 corresponding to the top surface 40, wherein a connecting pin insertion hole h1 for pinning upper and lower blocks with a connecting pin and a lifting pin insertion hole h2 for simultaneously lifting the upper and blocks, penetrate through the top and bottom surfaces 40 and 50.

The invention relates to an assembly type variable steel girder platform, a distribution method and an assembly method thereof. The platform is supported on a core tube, and is formed by sectional steel grinders through being fixedly connected, and the sectional steel grinders mainly consist of main stress grinders, sub stress grinders and support rods between grinders, wherein the main stress grinders are formed by main grinder standard nodes and main grinder groined node standard nodes through being dismountably connected via node plates with bolt holes, end sealing plates with bolt holes and screw bolts, the sub stress grinders are formed by sections of sub grinder standard sections through being dismountably connected end to end, and in addition, the sub stress grinders are dismountably connected between two main stress grinders. The platform can be applied to template lifting construction of high and superhigh building core tube steel platforms, and can also be used as platforms for large-area spanning construction operation and construction machine pile carrying and placement, the construction is very easy, the work period of the construction is greatly accelerated, and the construction cost is reduced.

The invention relates to a compound liquid for improving the early strength of the concrete mixed with polycarboxylate additive and a preparation method thereof. The compound liquid is prepared with the following components in weight proportion: 25-40percent of water soluble sulphate, 3-6 percent of organic alkoxyl amine and the rest is water. The preparation method is: 1) water is put into a reaction vessel and heated to 40DEG C- 60DEG C, and organic alkoxyl amine is added and well stirred; 2) water soluble sulphate is added and stirred to form a homogenous solution. The preparing process of the invention is simple and easy to apply; the invention does not corrode steel, and does not affect the condensation of concrete and reduce the later strength of concrete. The addition of the compound liquid is 0.5-1.5 percent of cementing material content and can improve the compressive strength of the concrete by 30-60 percent in 16h, by 25-40percent in 1d and by 15-25 percent in 3d, and the compressive strength of the concrete does not fall in 28d, which greatly shortens maintenance period, expedites construction progress, advances turnover rate of template, shortens construction period and lowers cost.

Disclosed is a material for composite consolidating earthen road surface and construction method thereof, wherein the said material comprises: sandy soil ranging from 92-98% by wt, 2-8% by wt of cement, ZL-1 liquid curing agent or EN-1 liquid curing agent ranging from 0.1-0.3 permillage of by gross weight of gray soil mixture; or silty soil or clayey soil ranging from 90-96% by wt, 4-10% by wt of lime, ZL-1 liquid curing agent or EN-1 liquid curing agent ranging from 0.1-0.3 permillage by gross weight of gray soil mixture. The material for composite consolidating earthen road surface and its construction method takes extensively distributed soil as main material, reduces 20-50% construction costs, shortens construction time limit, resists freeze, and prolongs available construction time in northern area with early freezing time.

The invention relates to an H-shaped tower column inner force adjustable temporary cross supporting structure which comprises a cross supporting part and brackets fixed on tower columns on the two sides respectively. The cross supporting part is arranged on the brackets in a carrying mode. The cross supporting part comprises an abutting-connecting end in abutting connection with the tower column on one side and a pushing end opposite to the abutting-connecting end. A lifting-underlay object is inserted at the movable portion between the pushing end and the tower column on the other side. The pushing end is provided with a pushing part which enables the horizontal supporting part to move to the abutting-connecting end after being stressed. The invention further relates to a construction method of the temporary cross supporting structure. Time occupied by a tower crane during temporary cross supporting part mounting is saved, adjusting on pushing force during construction is convenient, cable bend tower construction is accelerated, temporary cross supporting part high-altitude welding workload is lowered, temporary cross supporting part disassembling difficulty is lowered, and high-altitude working safety risks are reduced. The H-shaped tower column inner force adjustable temporary cross supporting structure and the construction method thereof can be used in horizontal temporary cross supporting part construction in bridge construction.

The invention discloses a method for cutting, removing and recycling deep foundation pit concrete near a river, and belongs to the technical field of building construction. The method for cutting, removing and recycling the deep foundation pit concrete near the river comprises the following steps that early-stage preparation work is carried out at a deep foundation pit near the river; the cuttingcross section of an inner support of the deep foundation pit is determined; supporting steel bars are used for supporting the inner support; hoisting holes are drilled in supporting beams of the innersupport, and are used for hoisting and transporting after cutting; the installation position of a rope saw cutting machine is determined according to the cutting cross section of the inner support, and static force cutting is carried out on the cutting cross section of the inner support; the supporting beams of the cut inner support are completely conveyed to a construction site through the hoisting holes; and the supporting beams, which are transported out, of the inner support are recycled. The method for cutting, removing and recycling the deep foundation pit concrete near the river is efficient, safe, environment-friendly, low in vibration, low in noise, free-dust, small in influence on surrounding environment, and low in environmental pollution, and can effectively reduce the construction waste.

The invention discloses a steel-concrete combined box beam which comprises two steel webs, a steel bottom plate, a diaphragm plate, a concrete layer, multiple stiffening ribs and a steel top plate, wherein the two steel webs and the steel bottom plate form a box chamber; the diaphragm plate is horizontally arranged at the upper part in the box chamber to divide the box chamber into an upper box chamber and a lower box chamber; the concrete layer is filled in the upper box chamber; the multiple stiffening ribs are arranged on the bottom plate in the lower box chamber; and the steel top plate is horizontally arranged on the top surface of the upper box chamber. In the steel-concrete combined box beam disclosed by the invention, the concrete combined top plate composed of the steel top plate, the steel webs, the diaphragm plate and the concrete layer bears pressure, and the lower bottom plate and multiple stiffening ribs bear the tension; and the steel-concrete combined box beam has the characteristics of high bearing capacity, high rigidity, good integrity and the like, greatly improves the structural stability, can give full play to the performance of the materials, is convenient to transport and hoist, and has short construction period, high efficiency and obvious economic benefits. Moreover, through the box beam, the height of the cross section of the box beam can be reduced, and the bridge appears more concise and beautiful.

The invention provides an earth pressure balance shield machine main drive seal test device. A tooling outer ring is installed on the outer side end of an outer seal pressure ring and an outer seal runway, a ring piece is arranged on the inner side end of the outer seal pressure ring, the tooling outer ring is connected with the outer seal pressure ring and the ring piece through a hexagon socket-head cap bolt; the tooling outer ring and the outer seal runway are connected using the hexagon socket-head bolt; the tooling outer ring and the outer seal pressure ring are sealed with an O-type ring; the tooling outer ring and the outer seal runway are sealed with the O-type ring, and the clearance between the outer seal pressure ring and the outer seal runway is sealed, a first labyrinth seal cavity is formed; by the earth pressure balance shield machine main drive seal test device, accurate detection is conducted on the main drive seal system of the shield machine when debug test is done before the factory delivery.

The invention provides a foamed hollow plastic fender product and a production method and equipment. The product comprises outer skin of the fender body and a filling layer, and is characterized in that a center hole is arranged in the fender body; an outer layer of an inner core, an enhancement layer and an inner layer of the inner core are sequentially arranged between the filling layer and thecenter hole, and a high-strength extrusion-tension rod is arranged in the filling layer. The invention has the following advantages: the product is suitable for the quay fenders, crash barriers, girders, columns and other building structures, saves the timber, rubbers and steel, is easy for construction, shortens the construction period and saves the building cost; besides, the product has excellent chemical stability and oxidation resistance, substantially enhances the impact resistance and flexibility, increases the elastic modulus and rigidity, thoroughly solves the problem that the steel reinforced concrete is corroded by seawater and doubles the service life; the application range of the product is expanded and waste polyethylene is used as the main material, thus obviously lighteningthe pressure of pollution.

The invention discloses a spring pressure-assisted cutting fixing device with double cutting torches and an application method of the spring pressure-assisted cutting fixing device, which are quite suitable for cutting grooves of petals of spherical tanks and can simultaneously carry out one-step groove forming cutting for two groove surfaces. The fixing device comprises a transverse adjusting rod, a cutting torch fixing sleeve and a supporting guide wheel, the transverse adjusting rod is connected with an arc seam cutting adjusting mechanism, the cutting torch fixing sleeve is mounted on a cutting torch positioning mechanism, the supporting guide wheel is mounted in a supporting guide wheel mounting mechanism, the arc seam cutting adjusting mechanism is fixed onto a spring pressure assisting mechanism by a bolt, and the cutting torch positioning mechanism and the supporting guide wheel mounting mechanism are mounted on the lower portion of the spring pressure assisting mechanism. The application method includes cutting an upper groove angle beta 1 by the aid of a positioning cutting torch; and cutting a lower groove angle beta 2 by the aid of an adjustable cutting torch in the movable cutting torch fixing sleeve, leading the positioning cutting torch and the adjustable cutting torch to realize cutting simultaneously, and forming an X-shaped cutting line on a spherical shell plate. Owing to spring pressure assistance, the supporting guide wheel always contacts with the steel spherical shell plate along with change of the shape of a cutting plate.

The invention relates to a double-layer steel-truss concrete laminated arch structure and a construction method thereof. The structure is characterized in that the upper surface and the lower surface of a steel-truss arch frame consisting of steel web plates, rods and steel chords are provided with an upper-layer steel structure, a lower-layer steel structure, an upper-layer concrete structure and a lower-layer concrete structure. The construction adopts a form of cast in place or prefabricated installation. The cast-in-place construction comprises the following steps: an arch is firstly formed according to a steel structure, and concrete is cast on the arch so as to form the double-layer steel-truss concrete laminated arch structure and realize joint stressing. The prefabricated installation construction comprises the following steps: a laminated structure is firstly formed on the steel structure and the concrete structure in place or in a factory to realize joint stressing, and then the double-layer steel-truss concrete laminated arch structure is formed by in-place installation. In the invention, the advantages are combined on the basis of the traditional concrete arch and the steel-truss arch structure so as to form the double-layer steel-truss concrete laminated arch structure, so that the characteristics of the two materials are fully performed, the used amount of the materials is saved, the structure stressing is simple and reasonable, the construction is convenient, the construction period is shortened, and the requirements for various-span arch bridges can be better met.

The invention provides a ceiling keel system and a method for installing the ceiling keel system; the ceiling keel system is fixed on the wall surface and comprises a hanging piece, a connecting piece, a main keel, an auxiliary keel, a panel and a screw; one end of the hanging piece is fixed on the wall surface; the connecting piece is provided with a first fixing groove, and one end of the connecting piece is connected with the other end of the hanging piece; the main keel is provided with a second fixing groove, and the main keel is embedded in the first fixing groove; the auxiliary keel comprises a first auxiliary keel body and a connecting part, the connecting part is rotationally connected with the first auxiliary keel body, and the connecting part is embedded in the second fixing groove to make the main keel connected with the auxiliary keel; the panel is fitted to the lower surface of the first auxiliary keel body; at least two screws pass through the first auxiliary keel body and the panel to connect the auxiliary keel to the panel. As the ceiling keel system is of a split type structure, the industrialization and batch installation of all components can be achieved, thereby reducing production cost and shortening construction period.

The invention discloses a supporting structure of an ultra-deep pipe gallery foundation pit and a construction method thereof, and relates to the field of pipe gallery foundation pit construction. According to the supporting structure, a slope support and a cast-in-place pile support are combined and applied to the ultra-deep pipe gallery foundation pit, the support structure is divided into a slope-laying support section and a concrete cast-in-place pile support section from top to bottom, so that the problem that the earth excavation amount is large when a side slope support is adopted singleness is avoided, and the problem that safety cannot be guaranteed when a cast-in-place pile support is adopted singleness is avoided. The supporting structure of the ultra-deep pipe gallery foundation pit and the construction method of the supporting structure of the ultra-deep pipe gallery foundation pit are high in operability, the supporting cost of the ultra-deep foundation pit is reduced, and the construction period is remarkably shortened.

The invention discloses a pipeline internal water seepage plugging device and a construction method of the pipeline internal water seepage plugging device. The pipeline internal water seepage plugging device comprises an air bag. The air bag is provided with an air inlet, a feeding opening and a discharging opening. The air inlet is connected with an inflation device. The feeding opening is connected with a pressure grouting device. The discharging opening is connected with the feeding opening through a grouting pipeline. The discharging opening is arranged on the side wall of the air bag. The two ends of the air bag are provided with traction devices. The air bag is made of high-temperature-resistant rubber pipe materials. The thicknesses of the air bag are not identical. The wall thickness at the discharging opening is larger than that at other positions. The two ends of the air bag are fixedly provided with gaskets through nuts. The outer walls of the two ends of the inflated air bag can be attached to a pipeline to be repaired in a sealed manner so that a sealed cavity can be formed in the middle of the air bag. By the adoption of the pipeline internal water seepage plugging device, grouting can be conducted inside the pipeline of any diameter, and therefore the problem that water seepage inside the pipeline cannot be plugged is solved.

The invention relates to a method for construction, maintenance and repairing of transmission and transformation lines in power engineering, in particular to a construction method for parallel suspension of lead trolleys by using V-shaped strings, which is characterized in that the V-shaped strings of composite insulators and two three-wheel lead wire releasing trolleys are connected into a whole by a Phi 22 circular steel connecting rod and two -20 three-hole linkage plates. A hanging tool for implementing the construction method for parallel suspension of lead trolleys by using V-shaped strings is characterized by mainly comprising the Phi 22 circular steel connecting rod for V-shaped strings, and two-twenty three-hole linkage plates. The construction method for parallel suspension of lead trolleys by using V-shaped strings, disclosed by the invention, can be widely applicable to the construction method of suspending lead trolleys by using V-shaped strings in the construction of 660 kv and above large-cross multi-split conductors with 2*' ONE Pulling Two', 2* 'One Pulling Two and One Pulling Four' and 2* 'One Pulling Four' tension wirings.

The invention relates to a construction method adopting guide positioning through a guide hole and smooth blasting. The construction method includes the steps that S1, a hole drilling blasting method is adopted for excavating a vertical shaft, an inclined shaft or a groove to the design elevation; S2, the four corners of the vertical shaft are excavated to form guide positioning holes, the drilled hole depth of the guide positioning holes reaches the design elevation; S3, the four positioning holes are connected, positioning control pre-cracking holes are distributed on a peripheral excavation line, and drilling to the design elevation is achieved at a time; S4, based on field engineering geology and rock conditions, the number of the drilled holes is appropriately increased, and the charging amount is adjusted; and S5, after vertical footage by 5 m, blasting excavation is paused, pouring of concrete is used for locking, after a tunnel is through, the vertical shaft is blast to penetrate a safety layer, and parallel slag discharging from the tunnel is achieved. The construction method has the beneficial effects that the construction quality is improved, the back break amount is reduced, and the stability of surrounding rock is good; the temporary support lining work amount can be reduced, and the construction cost is reduced; and the construction period can be accelerated.

The invention discloses a multifunctional stretchable inverted-arch trestle. The multifunctional stretchable inverted-arch trestle comprises a trestle girder, a front ladder stand, a back ladder stand, a walking cart, a stretchable trestle body, an inverted-arch formwork and a central furrow formwork; the walking cart is installed below the trestle girder, the stretchable trestle body is located at the front portion below the trestle girder, the front portion of the stretchable trestle body is arranged on a stretchable trestle body beam, the back portion of the stretchable trestle body is movably installed on the trestle girder through connecting plates, and the stretchable trestle body beam is installed on a walking auxiliary caterpillar band chassis through vertical auxiliary lifting hydraulic cylinders and auxiliary movable stand columns; the inverted-arch formwork and the central furrow formwork are sequentially installed in the middle and at the back portion below the trestle girder from front to back and move back and forth through the walking cart. According to the multifunctional stretchable inverted-arch trestle, the trestle girder, the stretchable trestle body, the inverted-arch formwork, the central furrow formwork and end sealing plates are designed into an integrated device, multiple working procedures can be carried out at the same time, the construction period is greatly saved, the construction efficiency is improved, the labor intensity of workers is reduced, the construction quality is guaranteed, and the construction cost is reduced.

The invention discloses a two-component polyurethane adhesive which is formed by mixing a component A and a component B. The component A is a polyurethane prepolymer, the component B is a mixture of acrylic resin and polyether polyol, and the ratio of the component A to the component B is 1: 1. The mixing ratio of the component A to the component B is optimized; therefore, the prepared two-component polyurethane adhesive is high in bonding strength; the surface drying time of the two-component polyurethane adhesive is relatively suitable for construction operation; during construction of engineering, the construction in a relatively constant state can be maintained; the normal construction period of a project is not influenced; the engineering construction period cannot be prolonged; meanwhile, the prepared adhesive stone is high in strength, meets the test standard of concrete C20 and is good in water resistance test, the adhesive stone prepared from the two-component polyurethane adhesive is resistant to aging and high in hardness, the water permeability reaches 35% or above, the water permeation effect is improved, and the stability of the adhesive stone used in rainy days is improved.