10results about How to "Control construction quality" patented technology

This invention discloses a prefabricated V-shaped rigid frame bridge and its construction method. The prefabricated V-shaped rigid frame bridge includes: pier foundations, at least two V-legs, and a main girder. The V-legs are composed of multiple prefabricated segments stacked together, with the bottom fixed to the pier foundation via a post-cast section and the top having a cast-in-place section. The main girder includes a No. 0 segment beam and multiple symmetrically arranged prefabricated segments. The prefabricated segments of the main girder are constructed using the inverted beam method, i.e., the top slab, then the web, and finally the bottom slab are prefabricated in sequence. The cast-in-place section of the No. 0 segment beam is integrally cast with the top cast-in-place section of the V-legs. This invention achieves rapid and standardized prefabrication and assembly of variable cross-section beams and V-legs through prefabrication and inverted beam method templates, shortening the construction cycle, reducing the risks of high-altitude operations and traffic interference, improving quality and durability, and possessing economic and environmental advantages.

The utility model relates to the technical field of electric wire laying, and disclose a kind of electric power cable core stranded wire laying device, comprising: base, the upper end one side of base is equipped with lifting mechanism, the lifting end of lifting mechanism is equipped with side frame, the outside one side of side frame is equipped with second driving motor, and the output end of second driving motor is located inside the side frame and is equipped with driving roller;Guide slot, open in the inside upper end both sides of side frame, the inside sliding installation of guide slot has guide block, and driving roller is rotatably installed between the guide block, and the upper end of guide block is equipped with first return spring;Telescopic side rod, set in the outside one side of side frame, the rear end of telescopic side rod is equipped with ring shell.The utility model lifting adjustment adapts to different height, elastic compression prevents cable deviation, blocking ring prevents loose and moves, quick-release structure simplifies cutting tool replacement, improves laying adaptability, precision and construction efficiency.

The utility model provides a kind of concrete pavement brick automation production line, and concrete pavement brick automation production line includes the product forming production line, transfer and transport production line, finished product palletizing production line and soaking curing production line in series successively;Product forming production line includes batching machine, mixer, cement metering storage tank, automatic forming machine and crusher;Transfer and transport production line includes adapter plate machine, laminating machine, first sub-mother ferry car, steel rail;Finished product palletizing production line includes second sub-mother ferry car and stacker;Soaking curing production line, including curing pool and automatic elevator installed in the curing pool.The utility model carries out optimization improvement to four processes in the concrete pavement brick production process, effectively integrates series use of mechanical automation equipment, creates a concrete pavement brick automation production line, and achieves good production effect: the concrete pavement brick automation production line realizes the automation production of entire technological process.

This invention provides a method for constructing retaining piles for a deep foundation pit within a pit, comprising the following steps: determining several sets of construction sequence groups by surveying the location of the retaining piles within the pit; for the preceding construction groups, excavating guide trenches and installing casings according to the construction sequence; constructing pile holes sequentially according to the construction sequence; each pile hole includes an empty drill section and an effective pile length section; connecting a simple hoist cage to a reinforcing cage at the bottom, lowering the simple hoist cage and reinforcing cage into the pile hole, with the top of the simple hoist cage connected to the pile hole opening; lowering a grouting pipe to pour underwater concrete to the top of the effective pile length section, and filling the empty drill section with fluidized solidified soil to the ground elevation; repeating steps 2-5 to construct the subsequent construction groups, forming the retaining piles within the pit; after the concrete has cured to the required standard, excavating the deep foundation pit and constructing the pit within the pit; and constructing a water-stop curtain on the outside of the retaining piles within the pit. This invention relates to the field of building construction technology and can solve the problems of high cost of backfilling empty drill sections with plain concrete and the easy cross-hole problems of backfilling empty drill sections with plain soil or yellow sand in the prior art.

The application belongs to the technical field of adhesive and particularly relates to a single-component high-tolerance interface material and a preparation method and application thereof. The interface material is prepared by mixing pre-polymer A and pre-polymer B, wherein the pre-polymer A comprises 75-80 parts of polyether polyol, 14-18.5 parts of aromatic isocyanate, 0.5-1 part of ultraviolet absorber, 0.5-1 part of antioxidant and 4-8 parts of plasticizer; the pre-polymer B comprises 70-75 parts of polyether polyol, 20-23 parts of aliphatic isocyanate, 0.5-1 part of ultraviolet absorber, 0.5-1 part of antioxidant, 3-8 parts of plasticizer and 0.1-0.3 parts of environment-friendly catalyst. The material has high construction tolerance, can form a strength meeting the construction requirements of a topcoat after 24 hours of construction, and can maintain a surface slightly sticky state to the seventh day, during which the topcoat is constructed, and the interface material and the topcoat can form firm adhesion, and the adhesion is excellent and not easy to peel off.

This application discloses a stiffened box girder-column connection structure and its construction method, including a vertical box girder, a stiffened box girder, multiple transverse reinforcing bars, and vertical reinforcing bars. The vertical box girder includes a box-shaped steel column and corbels connecting the box-shaped steel column. Lap plates are provided on the box-shaped steel column, located around the perimeter of the corbels. Inserts are placed on the corbels near the lap plates, with the centerline of the inserts perpendicular to the lap plates. The ends of the stiffened box girder are welded to the corbels. Transverse reinforcing bars are arranged around the circumference of the stiffened box girder, with their ends lapped onto the lap plates on the box-shaped steel column. Each vertical reinforcing bar is arranged around the circumference of the box-shaped steel column, with its end inserted into a corresponding insert. The stiffened box girder-column connection structure provided by this application, where the ends of the transverse reinforcing bars lap onto the lap plates and the vertical reinforcing bars are inserted into inserts, eliminates the need for holes to penetrate the box-shaped column and box girder, does not weaken the cross-sectional area of ​​the steel structure, ensures the integrity and stability of the steel structure, and allows the steel structure to fully utilize its load-bearing capacity.

The invention provides a real-time detection method and system for the positioning precision and reliability of an open-sea GNSS, and the method comprises the steps: setting N GNSS receivers on open-sea equipment, N > = 3, enabling the phase centers to be distributed at N vertexes of a TIN triangulation network, and calibrating the relative position parameters between the phase centers of the N GNSS receivers; synchronous observation and data acquisition: N GNSS receivers synchronously receive and acquire satellite observation signals and / or high sea base station differential correction signals to form observation data; real-time resolving: on the basis of a GNSS RTK carrier phase difference resolving engine and an LAMBDA integer ambiguity fast fixing algorithm, according to observation data of the N GNSS receivers, real-time resolving is carried out to obtain actual relative position parameters among phase centers of the N receivers; precision verification and comparison: setting a positioning error threshold value; and resolving a deviation value between the actual relative position parameter and the calibrated relative position parameter among the phase centers of the N receivers in real time, and comparing the deviation value with a positioning error threshold value to determine whether the positioning accuracy is qualified or not.

The utility model discloses a kind of steel reinforcement cage modularization assembly auxiliary tool, belong to the technical field of construction engineering equipment, including lower mould frame, upper mould frame, positioning frame and guide sleeve;The lower mould frame is positioned by base vertical rib and forms the vertical guide structure to the upper mould frame;The positioning frame is installed in the upper mould frame, the positioning frame is equipped with the limiting portion that preloading horizontal rib and preloading vertical rib form cross grid shape arrangement;The guide sleeve is fixed in the positioning frame, and the lower part of the guide sleeve forms the guide cone mouth portion that preloading vertical rib and base vertical rib are vertically aligned. This technical scheme can realize the modularization, standardization fast assembly of steel reinforcement cage, improve construction efficiency, ensure assembly accuracy, reduce manual labor intensity, improve on-site construction quality and consistency.

The utility model discloses a light high -strength prefabricated assembled ribbed slab type abutment, include: bottom support platform, ribbed slab is provided with two groups, two groups of ribbed slab symmetry fixed connection in the top surface of bottom support platform, platform cap shell is fixed in the top of ribbed slab, the top surface fixed connection of ribbed slab has I -steel connecting piece, and I -steel connecting piece inserts into platform cap shell, and fixedly connected with connecting reinforcing steel bar, back wall, back wall side two ends symmetry fixed connection has ear wall, back wall and ear wall integrated, and the outside of platform cap shell is fixed between back wall, wherein, after I -steel connecting piece inserts into platform cap shell, uses concrete pouring fixed. The utility model each component can be prefabricated in advance in factory. In construction site, only need to carry out simple assembling operation, has greatly shortened construction period. Compared with traditional on -the -spot pouring construction mode, need not to wait for concrete maintenance to reach design strength, has saved a lot of time.

The utility model discloses a flexible paving template for a coal mine, which belongs to the technical field of paving construction and comprises a plurality of flexible cloth bags connected with one another, each flexible cloth bag is a hollow bag body, the cross section of each bag body is of an isosceles trapezoid structure, the top of each flexible cloth bag is provided with a pouring hole, and each pouring hole extends inwards to form an inner flanging; a center formwork supporting pipe is vertically installed in the center of the flexible cloth bag, side formwork supporting strips are symmetrically arranged on the two sides of the flexible cloth bag, transverse formwork supporting strips are arranged on the top of the flexible cloth bag, and the side formwork supporting strips and the transverse formwork supporting strips are arranged in a staggered mode. The reinforcing steel bars penetrate through the through holes in the central formwork supporting pipe and the side formwork supporting strips to fix the flexible cloth bag on the road surface; the transverse formwork strips are used for connecting the adjacent flexible cloth bags. Compared with the prior art, the template can be tightly attached to a bent and uneven road, adapts to complex road conditions of a coal mine roadway road, and has low requirement on the flatness of a pavement before paving due to the fact that the template does not need to be removed, so that the construction steps are effectively simplified, and the construction labor intensity is reduced.