41results about How to "Convenient pouring construction" patented technology

The invention relates to a pre-mixed and water-permeable concrete admixture and water-permeable concrete. The pre-mixed and water-permeable concrete admixture is formed by mixing of the following components in percentage by weight: 10-20% of a water reducing component, 1-5% of a hydration regulating and controlling component, 0.1-1.0% of a viscosity regulating component, 0.5-5% of a water evaporation inhibiting component, 0.5-3% of a thixotropic agent component, and the balance of water. The pre-mixed and water-permeable concrete admixture provided in the invention can effectively improve work conditions of the water-permeable concrete, greatly improve the cohesiveness and the uniformity of slurry wrapping aggregate surfaces, and can effectively prolong the operable time of the water-permeable concrete, meet the requirements of pre-mixing production, long-distance transportation and long-time construction of the water-permeable concrete, and improve the control of production and construction quality of the water-permeable concrete.

The invention discloses a composite shear connection piece of a steel-concrete structure and a manufacturing and installing method thereof. The composite shear connection piece comprises shear connection piece bodies bent by reinforcing steel bars and bolt pin reinforcing steel bars penetrating through the shear connection piece bodies. The specific manufacturing and installing method includes the steps that steel beams are manufactured, and shear connection piece bodies are bent and welded; the steel beams are transported and lifted; concrete floor formworks are supported; the bolt pin reinforcing steel bars penetrate through the shear connection piece bodies, and the bolt pin reinforcing steel bars and the shear connection piece bodies are jointly bound to form a reinforcing steel bar mesh of concrete structure pieces; the formworks are disassembled after concrete pouring and normal maintenance are completed. According to the composite shear connection piece, as the shear connection piece bodies and the structural steel beams are welded and fixedly connected, and then a whole is formed through the bolt pin reinforcing steel bars penetrating through the shear connection piece bodies and the concrete structure pieces cast in place, the shearing strength and the rigidity of the steel-concrete composite structure are greatly improved, synergetic stressing between concrete plates and the steel beams is effectively achieved, and the composite shear connection piece has the advantages that the structure is simple, processing is easy and convenient, cost is low, construction cost is reduced, the site installing speed is high, and welding quality is guaranteed.

The invention relates to a structure for preventing perforation and slurry leakage of a cast-in-situ bored pile in water and a construction method of the structure. An outer protecting cylinder is arranged at the periphery of a reinforced concrete cast-in-situ bored pile, an activated material slurry fixed protecting disk and an activated material slurry fixed protecting wall are arranged between the reinforced concrete cast-in-situ bored pile and the outer protecting cylinder from top to bottom, and a cement soil water stop protecting wall is arranged below the activated material slurry fixed protecting wall; the diameter of the activated material slurry fixed protecting disk is greater than that of the activated material slurry fixed protecting wall and that of the cement soil water stop protecting wall; a reinforcement cage positioning embedded part is arranged in the middle of the activated material slurry fixed protecting disk; the reinforced concrete cast-in-situ bored pile is formed by placing a reinforcement cage in an inner protecting cylinder and then pouring concrete. The protecting cylinder structure is high in stability, good in environmental protection and lower in cost, is capable of effectively preventing the perforation and the slurry leakage of the cast-in-situ bored pile in the water, and has better technical and economical benefits.

The invention belongs to the technical field of defective concrete reinforcing and relates to a concrete supporting replacement structure and a method for performing defective concrete replacement applying the concrete supporting replacement structure. The concrete supporting replacement structure comprises a plurality of combined supporting racks and horizontal connection parts for connecting thecombined supporting racks together. The defective concrete replacement method comprises the steps that stepA, holing is performed in specified positions; stepB, top horizontal beams and bottom horizontal beams are installed; stepC, beam supporting brackets are installed; stepD, bracket vertical columns are installed; stepE, the horizontal connection parts are installed; stepF, concrete is chiselled away; stepG, a template is supported and arranged; stepH, concrete pouring is performed; stepI, the template is removed; stepJ, deformation monitoring is performed; and stepK, the supporting replacement structure is removed. By means of the concrete supporting replacement structure and the method for performing the defective concrete replacement applying the concrete supporting replacement structure, in-situ concrete structural replacement can be performed under the premise of not damaging or changing the building structural appearance, and the defective concrete structural safety problem is solved.

The invention provides a locating template for a stiff steel column. The locating template comprises a flat plate, wherein the outer edge of the flat plate and vertical reinforcing bars arranged around the outer side of the stiff steel column are arranged correspondingly, the flat plate is provided with a plurality of ground bolt locating holes, a ventilating hole is formed in the center of the flat plate, and the flat plate is further provided with a plurality of inner-side vertical reinforcing bar locating holes and a plurality of pouring holes. The locating template provided by the invention is applied to ground bolts and the vertical reinforcing bars of the stiff steel column, and the ground bolt locating holes formed in the flat plate are used for locating specific positions of the ground bolts and mutual spacing thereof; the inner-side vertical reinforcing bar locating holes formed in the flat plate are used for locating specific positions of inner-side vertical reinforcing bars and mutual spacing thereof; outer-side vertical reinforcing bars are prevented from inward displacement through widening the peripheral dimension of the flat plate.

The invention relates to the technical field of basement building construction, in particular to the technical field of high-water-level elevator foundation pit or sump construction, and particularly discloses a component for tubular well precipitation construction in an elevator foundation pit or sump. The component comprises a hollow sleeve, wherein a horizontal support plate, perpendicular to the sleeve, is arranged at the lower part of the sleeve, the sleeve is provided with an eave board above the support plate, the sleeve penetrates through the eave board and the support plate, and the eave board and the support plate are fixed with and in seamless connection with the sleeve; and the part, below the support plate, of the lower part of the sleeve is inserted into a tubular well, and the support plate is horizontally erected outside the opening of the tubular well and used for supporting the sleeve. The invention further discloses a construction method. The construction method comprises the following steps of tubular well precipitation, earth excavation, component mounting, cushion layer construction, water-proof layer construction, foundation raft concrete pouring, earth backfilling, tubular well blocking and the like. By applying the component and the construction method, the construction of the cushion layer, the water-proof layer and the foundation raft of the elevator foundation pit or sump can be conveniently carried out, the construction water-proof quality can be ensured, the construction efficiency can be improved, and the construction cycle can be shortened.

The invention discloses an integral type building construction assembly technique. The integral type building construction assembly technique is characterized in that: a base is arranged on the bottom of a column template; an adjustable support pillar is arranged at one side of the column template; angle steel is arranged on the upper part of the support pillar; a superposed beam is arranged on the angle steel; a hole is formed in the superposed beam; a steel column is inserted into the hole; a square timber is arranged on the steel column; a prefabricated ribbed prestressed concrete superposed plate are arranged on the square timber; the columns, the beam, and plate steel bars are lapped according to a design demand; a prefabricated concrete superposed beam template is arranged; and then the columns, the beam, and the plates are poured into a whole. The integral type building construction assembly technique can increase the whole speed of building assembly and construction, facilitates construction quality control, and can ensure construction safety.

The invention discloses a lining pouring method for a telescopic moulding bed and used for integral pouring for a lining of a molten steel tank, and relates to the technical field of construction methods for castables of molten steel tanks. According to the lining pouring method for the telescopic moulding bed and used for integral pouring for the lining of the molten steel tank, a frame and a shell body of the molding bed are integrally connected and have different functions, the relative displacement of the frame and the shell body is realized by using the thrust of an electric cylinder, and the purpose of accurate centering is achieved; the shell body of the moulding bed is divided into two parts, that is, a telescopic door and the shell body, the telescopic door is moved through the thrust of an electric push rod, the working diameter of the shell body of the moulding bed is changed, and a shaping pouring function and a demoulding function for the moulding bed are realized; and attached vibration motors which are arranged in a layered and staggered manner are adopted, so that uniform and independent vibration of all parts of the moulding bed is ensured, and the compactness of a castable is realized.

The invention provides a self-propelled trestle trolley for an inverted arch trestle trolley. After an inverted arch formwork system is installed at a time, the inverted arch formwork system can be dragged by a trestle trolley to achieve inverted arch operation construction of a whole tunnel with the same section, formwork assembling and disassembling are omitted, full-automatic mechanical controlmoving and positioning are adopted, labor intensity of workers is greatly reduced, labor cost is saved, and construction efficiency and construction quality are improved; and meanwhile, the invertedarch formwork system is detachably connected with the trestle trolley, a separation mode is simple, the inverted arch formwork can be ensured not to interfere with construction of other procedures inthe procedures of inverted arch excavation, wire-tie and the like, and control is flexible and convenient.

The invention discloses a cast-in-place externally prestressed concrete-filled steel pipe pile, which comprises a steel pipe, a concrete layer cast-in-place in the steel pipe and multiple prestressed tendons arranged on the steel pipe, wherein the prestressed tendons are arranged along the direction of the axis of the steel pipe, and comprise top sections, middle sections and bottom sections; the middle sections are positioned outside the steel pipe; the top sections and the bottom sections penetrate through the wall of the steel pipe and enter into the steel pipe; the upper end of the steel pipe is opened, and the bottom end of the steel pipe is provided with a sealed structure. The invention also provides a construction method of the concrete-filled steel pipe pile and a support pile wall with the concrete-filled steel pipe pile. In the way, the external prestressing technology is adopted by the cast-in-place externally prestressed concrete-filled steel pipe pile, a pile body can be restrained better, the tensile resistance is provided, and deformation of the support pile wall in the excavation process of a foundation pit is effectively limited; in addition, field fabrication can be performed, transport costs are reduced, on the premise of guaranteeing safety and reliability of a foundation pit support, the cost is reduced, the construction period is shortened, and construction is convenient.

The invention relates to the field of buildings, and provides a prefabricated assembly type pier and a construction method thereof. The pier comprises a plurality of pier columns arranged at intervals in the first direction; prefabricated straining beams arranged between two adjacent pier columns in the plurality of pier columns; and connecting pieces arranged at the joints of the pier columns and the prefabricated straining beams; wherein at least part of the connecting pieces and the pier columns are integrally formed in a pouring mode, the prefabricated straining beams are provided with assembling ends, and the assembling ends are fixedly connected with the connecting pieces. The prefabricated assembly type pier has the advantages that the connecting pieces and the pier columns are integrally formed in a pouring mode, then the connecting pieces are connected with the prefabricated straining beams, and the assembling of the prefabricated straining beams and the pier columns is achieved. In the construction process, the pier columns can be continuously constructed, the construction period is short, the pier columns are not provided with splicing sections, and the pier column structure strength is high.

The invention relates to a formwork device for cantilever structure construction and a construction method thereof. The device comprises at least one pair of supporting rods arranged oppositely, convex extending sections, a plurality of connecting rods, first connecting members and second connecting members; each convex extending section is formed in the manner that one end is embedded in a pouredmain body structure and the other end convexly extends out of the poured main body structure and is located in a to-be-constructed cantilever structure; the opposite two ends of each connecting rod are fixed to the convex extending sections of the corresponding supporting rods; and the first connecting members are transversely fixed on the supporting rods and the bottom surfaces of the connectingrods, and transverse first slots where bottom molds are inserted are formed in the opposite two sides of each first connecting member. According to the formwork device, the supporting rods are pre-embedded in the main structure to serve as subsequent main stress members. The connecting rods and the supporting rods are used as the stress members for transversely hoisting templates so that pouringcan be carried out on the templates to form the cantilever structure.

The invention provides an open cut tunnel and bridge underpinning combined integrated construction method, belongs to the technical field of rail transit deep foundation pit engineering, and aims to meet the requirements of rapid construction of an underpass tunnel and normal passage of an upper bridge at the same time. The method comprises the steps that firstly, supporting piles, underpinning piles and fender posts are constructed; 2, the jacking holding force of the auxiliary pier is set, and the stand column is hooped; thirdly, slope excavation is conducted till the underpinning bearing platform bottom is reached, stand columns are cut off, and old bearing platforms and old pile foundations which conflict with the tunnel structure and the first horizontal supports at the upper end and the lower end are chiseled away; fourthly, water cutting is conducted on stand columns, a top ring beam and first horizontal supports at the upper end and the lower end are constructed, and then an underpinning bearing platform is constructed; fifthly, after the underpinning bearing platform reaches the design strength, the auxiliary piers are dismantled, the bearing piles are pulled out, and pile bodies on the upper portions of the shared fender posts are cut off to the elevation of the top ring beam; sixthly, foundation pit earth excavation is conducted layer by layer, and supports below the first horizontal supports at the upper end and the lower end are poured and erected; and seventhly, after excavation is conducted to the base, a tunnel structure is built back, the horizontal supports are dismantled, and construction is completed.

The abrupt slope dam section arch dam transverse joint design method comprises the following steps that (1) the joint position is determined, specifically, the basic position of transverse joint arrangement of an abrupt slope dam section is determined according to the standard requirement of an arch dam in combination with the size of a dam body flood discharge hole and the structural arrangement of holes in the dam; calculating coordinates of an intersection point of each seam and the dam axis according to the dam axis curvilinear equation and the parting length; (2) selecting a transverse joint transition interval of the abrupt slope dam section; (3) determining the arrangement of the transverse joints above the first control elevation; (4) determining the arrangement of a transverse joint below a second control elevation; and (5) determining the arrangement of a transition joint between the first control elevation and the second control elevation. According to the abrupt slope dam section arch dam transverse joint design method, pouring construction of the abrupt slope dam section and the transverse joint face is facilitated, and stress distribution of a triangular body of the abrupt slope dam section is improved.