31results about How to "Small construction machinery" patented technology

The invention relates to the field of foundation bases and discloses a multi-row mini-pile enclosing structure for blocking soil and a construction process. The multi-row mini-pile enclosing structure for blocking soil comprises a top beam (2) and more than two rows of mini piles (2), the mini piles (2) comprise front-row piles (21) and rear-row piles (22), cement stirring piles (3) are arranged between the front-row piles and the rear-row piles (22), and the top ends of the mini piles (2) are connected together by the top beam (1). The construction process comprises the steps of digging grooves, positioning pile heads, drilling, grouting, casting and the like. The multi-row piles have the advantages that the whole performance is good, the anti-bending rigidity is high, the lateral deformation of a foundation pit and the surface subsidence of the periphery of the foundation pit can be effectively controlled by an inner support or an anti-pulling anchor rod, the construction time can be saved well and the construction cost is reduced.

The invention discloses an unloading piled anchor multi-stage support structure and a construction method, and belongs to the technical field of geotechnical engineering anchoring. The unloading piledanchor multi-stage support structure comprises a framed anchor and a piled anchor combination structure. The framed anchor is composed of a frame and anchor rods, and the anchor rods are anchored tothe frame by anchorage devices. The piled anchor combination structure is composed of anchor rods, cast-in-situ bored piles, unloading grouting bearing steel pipes and a crown beam. Enlarge heads arepoured at the bottoms of the cast-in-situ bored piles, and the crown beam is poured at the tops of the cast-in-situ bored piles. The unloading grouting bearing steel pipes penetrate through a reservedpassage on the crown beam to drive into a stable soil body. The ends, penetrating through the unloading grouting bearing steel pipes, of the anchor rods are anchored in the stable soil body, and theother ends of the anchor rods are fixed to the crown beam. Stand columns on the lower portion of the framed anchor are poured on the crown beam. The unloading piled anchor multi-stage support structure and the construction method can fully utilize the lifting action of the unloading grouting bearing steel pipes and the free sections of the anchor rods between an unstable soil body and piles for unloading, the soil pressure acting on pile bodies is reduced, and the problems of the embedded depth, diameter and reinforcement of support piles in row and the length of the anchor rods working with the frame are solved.

The invention relates to a construction method for an underbridge. The construction method comprises the following steps of: firstly pouring a middle-part base plate and a vertical wall on ground, and reserving a steel pipe pile inserting hole on the base plate, wherein retaining wall guide rails are arranged on two side surfaces of the exterior of the base plate and the retaining wall guide rails and the base plate are poured together; after the concretion degree of the base plate is up to the concretion strength requirement, driving a retaining wall from two sides of the base plate to a place which is 0.5-1m below the lower surface of the base plate along the retaining wall guide rails, and inserting a steel pipe pile and applying pressure to the followed reduced place which is 0.5-1m below the lower surface of the base plate after drilling and taking out soil in the steel pipe pile inserting hole reserved on the base plate; arranging a jack at the top of the steel pipe pile by taking the steel pipe pile as a support, lifting up the base plate by use of the jack, taking out soil below the base plate and sinking the poured base plate and the vertical wall; and pouring the externally extended base plate and vertical wall again, repeating such steps till finishing the sinking process, taking out the steel pipe piles and the retaining walls, and mounting a beam plate. The construction method for the underbridge, disclosed by the invention, has the advantages of rather fewer machines used in the process of construction, small occupied area and smaller influence on surrounding environment.

The invention relates to an integrally continuous backing method for a moving formwork on a girder face. The integrally continuous backing method comprises the following steps that (A), a rail and jack supporting positions are arranged on the girder face, and a first backing girder is lifted and downwards placed on jacks; (B), a second backing girder is arranged, and a connector of the second backing girder is aligned with the first backing girder; (C), horizontally moving suspension girders and a horizontally moving jack system are arranged; (D), a main girder is connected with a backing upper suspension girder; (E), the backing upper suspension girder and anchor holes of the horizontally moving suspension girders are fixed on preformed holes of a frange plate by suspension rods; (F), according to the mounting steps, a back horizontal girder is connected with the main girder; (G), opposite-pulling finish-rolled deformed steel bars for brackets are removed, and the brackets are horizontally moved out of holes; (H), the formwork is integrally and horizontally moved to a designated position, and a vertical stabilizer rod is arranged; and (I), all suspension rods of the preformed holes of the frange plate are relieved, the backing upper suspension girder and a vertical pushing device on a rail of the back horizontal girder are synchronously operated, and the moving formwork is subjected to continuous backing travel till backing construction is finished. According to the integrally continuous backing method, the backing construction period of the moving mould frame is shortened, the input of mechanical equipment is reduced, construction cost is saved, and the construction safety risk is lowered.

The invention discloses a high-viscosity modified asphalt thin layer road surface for an assembled coil (plate) structure. A method for forming the high-viscosity modified asphalt thin layer road surface comprises the following steps of: preparing a substrate (non-woven geotextile), a cementing agent (high-viscosity modified asphalt), a reinforced material (glass fiber), rough aggregate (smashed stone), fine aggregate (sand and stone chips), a filler (mineral powder), a pigment (coloring matter) and an additive (viscosity depressant) according to the requirements of service environments such as hot regions, warm regions and cold regions; designing mixtures of different mixture ratios; paving non-woven geotextile serving as a substrate on a production line; paving a high-viscosity modified asphalt warmly-mixed mixture formed by stirring on the substrate; pressing into a coil (plate) road thin layer road surface by using a pressure machine; coiling coils into cylinders by adopting a cylindrical roller support; and packing plates in a supporting way. In the invention, the road asphalt thin layer road surface is integrated into industrial production and assembled construction, so that the high-viscosity modified asphalt thin layer road surface has the characteristics of high integration, quick construction, reliable quality, superior performance, saving in energy, environment friendliness, attractiveness, practicability, wide application and the like.

The invention discloses a wharf structure suitable for a silt coast. A direction which is close to the sea is used as a front direction, and a direction which is relatively away from the sea is used as a rear direction. The wharf structure comprises a causeway, a front diaphragm wall, a rear diaphragm wall, a partition, a plurality of coupling beams and a wharf upper part structure, wherein the front diaphragm wall, the rear diaphragm wall and the partition form a cylindrical caisson structure; the coupling beams are connected with the rear diaphragm wall and a pile foundation; and the wharf upper part structure covers the front diaphragm wall, the rear diaphragm wall, the partition and the pile foundation. By the structure, construction difficulty and engineering investment costs are reduced effectively. A construction method comprises the following steps: (1) constructing the causeway by bagged sand quilts; (2) reinforcing the causeway and silt filled at the rear of the causeway in a blowing manner, reinforcing new silt filled in the blowing manner, and constructing the front diaphragm wall, the rear diaphragm wall and the partition to form the cylindrical caisson structure when the bearing capacity of foundation soil reaches 5 tons at least; (3) excavating causeway remaining earthwork in front of the front diaphragm wall and earthwork under a natural silt surface, and enabling the front edge of a wharf to reach designed water depth; and (4) constructing the pile foundation and the coupling beams, and then constructing the wharf upper part structure. The construction method is simple.

The invention discloses a support construction process of a lotus root-shaped segmental expanded soil anchor rod, which comprises the following steps: drilling a hole in the ground or the wall surface of a deeply-excavated basement or the vertical wall of an unexcavated foundation pit to a certain designed depth, flushing by using a slurry wall protection method to form a columnar hole, placing aprefabricated anchor rod steel bar wrapped by a woven tubular bag in the hole, injecting a cement paste or a chemical grout through a pre-embedded injection pipe, carrying out segmental expansion andextrusion on sludge soil in the hole wall, using a pre-arranged plastic short hose and a paste complement tube as ventilation tubes, and discharging air in the hole to fully expand the wrapped woven tubular bag to be tightly combined with the soil so as to form a lotus root-shaped anchor rod. By using the anchor rod support construction method according to local conditions, the invention can greatly reduce the construction cost of foundation pit support, shorten the construction period, lower the construction difficulty, save energy and materials, and has the characteristics of portable construction machinery and simple operation.

The invention discloses a construction method for machine-made glass magnesium composite plate air pipes. The construction method comprises the following steps that (1) plates of the air pipes are cut; (2) the air pipes are spliced; (3) the air pipes are hoisted and connected; and (4) parts of the air pipes are mounted. Compared with a tradition construction method for a galvanized steel plate airpipe, the construction method for the machine-made glass magnesium composite plate air pipes has the characteristics of less construction machines, simple construction procedures, less auxiliary material using amount, small floor space, short construction period and the like. Due to the fact that the air pipes are connected without flanges, a large amount of engineering materials such as angle steel, gaskets, bolts, welding rods, rivets, oxygen and acetylene can be saved; and the average construction efficiency of the galvanized air pipe is 3 m<2> / d per person, the average construction efficiency of the machine-made glass magnesium composite plate air pipes can reach to 12.1 m<2> / d per person, and as for manufacturing and mounting of the air pipes with the same area, the construction period can be shortened obviously for the machine-made glass magnesium composite plate air pipes.

The invention provides a separated dismantling and hoisting method for large-scale corbels used for high pier construction. During separated dismounting, firstly, an opposite-pull beam is welded to the interchanges of vertical supports and connecting beams of the corbels, and the pair of corbels are oppositely pulled through pull rods; then connection between cross beams and supports of the corbels is dismantled, and the cross beams are hoisted to the ground through cranes; and the corbel supports on the two sides of a pier body are lifted through the two cranes at the same time, the pull rods are dismantled, and the corbel supports are hoisted to the ground. During corbel mounting, firstly, the supports of the pair of corbels are separately hoisted to the two sides of the pier body through the two cranes to be mounted and oppositely pulled through the pull rods; and then the corbel cross beams are hoisted, and the pull rods are tensioned through hydraulic jacks.

The invention relates to a launching construction method of a steel cofferdam suitable for a shallow water area. The method includes flatting a steel cofferdam assembly yard; building a steel cofferdam launching slope; arranging temporary buttress and ground anchor; assembling the steel cofferdam; filling in air bags; aerating the air bags and removing the temporary buttress; pushing an excavator in position; arranging a water leading anchor; arranging a guide pulley; pushing the steel cofferdam to a first machine barge; the steel cofferdam is bound with the first machine barge; the steel cofferdam is bound with another machine barge; and floating the steel cofferdam. The method can enable the steel cofferdam to launch in the shallow water area once without stranding, the process is simple, safe and reliable, and time is saved.