160results about How to "Low construction noise" patented technology

The invention discloses a slope protection pile pouring and cable bolting construction method for a deep foundation pit. The method comprises the following steps of: 1, making preparations before construction; 2, pouring a slope protection pile, namely measuring, paying off, molding and constructing the poured slope protection pile, punching holes on the poured slope protection pile, binding and hoisting a steel reinforcement cage for molding the slope protection pile, pouring concrete into the poured slope protection pile and constructing a crown beam at the top end of the pile; and 3, excavating a foundation in a layered form and constructing anchor ropes on different rows, namely excavating a first-layer foundation, arranging a first row of anchor ropes, arranging a steel waist rail, arranging anchor heads of the anchor ropes, tensioning the anchor ropes and finishing excavating processes of different layers of foundations and arranging different rows of anchor ropes. The method has a reasonable design, simple construction steps, low investment cost, large support depth and good using effect, and solves the problems of complicated construction steps, high construction cost, inconvenience in control, easy damage to surrounding pipelines, roads, buildings and the like, large construction space and the like existing in the conventional double-row pile supporting method can be solved.

The present invention discloses a concrete core cement earth stirring pile machine and its construction process and method. The bottom portion of said pile machine is equipped with hydraulic walking system, including machine frame, base seat, hydraulic pump station, longitudinal and transverse moving beams, longitudinal and transverse roller supporting frames, guideway, deep stirring machine head, drilling machine, drill bit, slurry pump, distribution box and hydraulic pile-pressing system.

The invention relates to a water drill dug pile construction method. In the method, layered construction is adopted, and a plurality of cylinder cores with certain height are drilled around the inner wall of a pile hole by a water drill when each layer is constructed, so that a pile foundation core is separated from the whole rock to form a free face; the pile foundation core is punched by an electric hand drill, and steel wedges are inserted into holes respectively; the steel wedges are hammered by a hammer, so that the steel wedges apply horizontal tension and shear stress to the pile foundation core; when the horizontal tension and the shear stress are larger than the limit tension stress and shear stress of the rock, the pile foundation core can be subjected to tension fracture and shear fracture to be split from the whole rock so as to clear fragmented rock away from the pile hole and correct the pile hole; and the next layer is constructed by the same processes and the processes are repeated until the pile hole is formed.

The invention discloses high-strength and vibration-free self-compacting concrete prepared from machine-made sand. The high-strength and vibration-free self-compacting concrete mainly comprises water, a cementing material, machine-made sand and gravels and is characterized in that the main technical parameters of the concrete are as follows: in the concrete, the water-binder ratio is 0.21-0.32, the water-powder ratio is 0.65-0.83, the sand ratio is 44-60%, and the unit paste volume dose is 0.45-0.53. The high-strength and vibration-free self-compacting concrete prepared from the machine-made sand, which is disclosed by the invention, has high flowability, non-segregation, uniformity and stability, flows relying on the self weight of the concrete in the process of pouring, and achieves a compacted effect without vibrating, so that the problem of cracking in section conversion in the process of construction is solved, and thus a series of purposes of reducing the amount of labor, accelerating the construction speed, reducing the construction noise, saving the construction cost, and the like are achieved.

The invention provides a pile-forming method for a cement paste spraying multi-directional core entraining mixing pile, which is characterized in that (1) a mixing pile machine is in position and leveled, and a bit aims at a pile position; (2) a drill pipe downward stirs and cuts soil along a guide frame until the designed depth; (3) after the drill pipe reaches the predetermined design depth, concrete are locally and continuously sprayed and stirred at the tip of the pile for more than 10 to 30 seconds; (4) the drill pipe is lifted; (5) concrete spraying is carried out while stirring; the drill pipe is lifted to the surface of earth or the designed elevation to finish the construction of a signal multi-directional mixing pile; (6) the tip of the pile of a core pile passes through a central hole of a jacking pile platform and is inserted into the center of the finished multi-directional mixing pile; (7) after the core pile sinks by self-weight and is penetrated into a certain depth of the mixing pile, the core pile is collated along two directions and the verticality of the core pile is regulated; the core pile is continuously sunken without any unmistakable; and (8) the core pile is pressed by hydraulic static force until the designed appointed depth. The method can realize the synchronous implementation of the mixing pile and the core pile operation, has high working efficiency, convenient construction, and low construction noise; the stress of the pile body is more reasonable and the pile shaft has high strength.

The invention relates to a precast steel pipe concrete laminated column comprising a foundation and a plurality of steel pipe concrete segments. The steel pipe concrete segments comprise the bottom segment, the top segment and one or more intermediate segments. Each steel pipe concrete segment comprises a lower steel plate, a steel pipe concrete main body and an upper steel plate which are fixedly connected in sequence. The bottom segment and the corresponding intermediate segment are fixedly connected through connecting anchor bolts, and the corresponding intermediate segment and the top segment are fixedly connected through connecting anchor bolts. Bottom anchor bolts are arranged on the upper surface of the foundation. The bottom segment is fixed to the foundation by means of connection of the lower steel plate of the bottom segment and the bottom anchor bolt. The precast steel pipe concrete laminated column has the characteristics of high bearing capacity, good anti-seismic performance and excellent durability and can be precast and manufactured in a factory or a different place in advance, the defect of complex procedures of traditional cast-in-situ concrete construction is avoided, and the precast steel pipe concrete laminated column has the advantages that the construction speed is high, the influence on the environment is small, the construction period is short, construction noise is low, material stacking sites are few, and environmental protection is facilitated.

The invention relates to a self-compacting cement soil slurry for unbackfilled trench backfilling. The self-compacting cement soil slurry is characterized in that the basic formula is that the used materials in per stere comprise 100-400 kg of cement, 500-900 kg of local soil, 200-400 kg of stone chips or stone powder, 50-100 kg of fly ash, 1-3% of a quick-setting agent or early strength agent, and a right amount of water, the materials are uniformly stirring with a stirrer, and the stirred material is poured into a unbackfilled trench. According to the present invention, the vibrating pounding process is eliminated, the molding is achieved with the self-weight, the construction noise is reduced, the working environment of the workers and the living environment of the surrounding residents are improved, the problem that the vibrating pounding operation is not easily performed or cannot be performed is solved, the pouring speed is improved, the construction period is shortened, the labor intensity is reduced, the material cost is saved and the external conveying cost of the soil is reduced due to the local material taking, the industrial waste such as fly ash, stone chips and the like are utilized so as to provide the significant cost advantage compared to the concrete mortar, and the significant economic, social and environmental protection benefits are provided.

The invention discloses a scaffold wall body connecting piece and a method for building a buckling tubular steel scaffold, including the following steps: 1), arranging the scaffold wall body connecting piece according to the standard space of three-step-two-span or three-step-three-span of the building; 2)building a sweeping pole, a vertical pole, a transverse pole and a connecting pole; and 3)building fencing guardrails, bridgings, a scaffold board, a safety net until the whole scaffold body develops into an integral sealed balanced system. The wall body connecting piece is composed of a connecting piece reinforcing steel bar which stretches into the building wall body, a connecting piece steel pipe outside the building wall body, and a detachable fixing piece which connects the connecting piece reinforcing steel bar and the connecting piece steel pipe. The U-shaped segment or rectangular segment of the connecting piece steel pipe outside the building wall body extends into the connecting piece steel pipe. Adopting such arrangement, the scaffold wall body connecting piece ensures the integrity of the building wall body, improves the impermeability of the building wall body, enhances the strength of the building wall body, reduces construction noises and shortens construction period.

The invention discloses a high-water-retaining-property shield construction premixed synchronous grout material which comprises cement, coal ash, admixture, bentonite, fine sand, additives and water. The additives mainly comprise non-ionic cellulose ether, carbohydrate, polycarboxylic acid slump retaining agents, starch ether and magnetic hydrotalcite. The high-water-retaining-property shield construction premixed synchronous grout material has the advantages that the optimized admixture, the bentonite, the fine sand with the fineness modulus being 1.6 and the additives special for mortar are jointly used in the shield construction premixed synchronous grout material, the fluidity loss of the adjusted grout material is less than or equal to 30mm in 6 hours, bleeding rate is reduced to be lower than or equal to 3.0%, and sedimentation after a vibration test is less than or equal to 20mm; due to the fact that the magnetic hydrotalcite is added, the grout material can reduce construction noise during stirring and absorb heavy metal ions to prevent heavy metal in the mortar from causing secondary pollution on the basis that the original physical properties are kept.

The invention discloses a fissure-contained rock soil stratum prestressed anchor cable grouting and anchoring construction method. Multiple prestressed anchor cables uniformly distributed on the same one plane are adopted to reinforce a slope to be reinforced; the method comprises the following steps: (1) the rock mass joint fissure development degree of each rock stratum is determined; (2) the lengths of anchoring sections and the hole port positions of anchor cable holes are determined; the prestressed anchor cables include anchor cable bodies, primary grouting pipes and secondary grouting pipes; anchoring tools are mounted at the back ends of the anchor cable bodies; and the anchor cable bodies include multiple steel strands; and (3) the prestressed anchor cables are grouted and anchored: when any one prestressed anchor cable is grouted and anchored, the construction includes the steps of drilling, placement of the anchor cables, normal-pressure grouting, high-pressure grouting, tensioning of the anchor cables and anchor sealing. The method is simple in steps, reasonable in design, convenient to construct, high in construction efficiency and excellent in use effect, and can conveniently and quickly finish the reinforcing process of the slope to be reinforced; and the adopted prestressed anchor cables are low in cost and higher in anchoring force, and can effectively reinforce the slope to be reinforced.

The invention discloses a construction method for preventing static-pressure precast tubular piles from floating. The method mainly comprises the steps of conducting positioning and paying off, taking a pile machine in place, pitching the piles, pressing the piles, splicing the piles, feeding or cutting the piles and forming the piles. The method can prevent the piles from rebounding and moving up to the maximum extent after the piles are pressed, bearing capacity of the piles is improved, the practical quantity of the piles is reduced, and therefore a pile arrangement coefficient is reduced. According to actual measurement of a project, the bearing capacity of a single pile can be improved by 15 percent to 20 percent, construction cost of the tubular piles is saved by 15 percent, and economic benefits are quite obvious.

The invention discloses a city and town medium-and-small river sludge ecological treatment system. The system comprises five subsidiary modules of a river dredging subsidiary module, a slurry pumpingsubsidiary module, an agent adding device subsidiary module, a reaction device subsidiary module and a slurry dehydration and solidification subsidiary module; the city and town medium-and-small riverdredging subsidiary module is connected with the slurry pumping subsidiary module and the agent adding device subsidiary module, macromolecular flocculation agent for water treatment is selected according to analysis of river sediment properties, the agent is put into the slurry pumping subsidiary module through the agent adding device subsidiary module, slurry is fully reacted with the agent inthe reaction device subsidiary module, and finally solidification is conducted in a dehydration container of the slurry dehydration and solidification subsidiary module to achieve slurry-water separation. The sludge is subjected to reduction, stabilization, hazard-free treatment and resourceful treatment; the construction noise is low, secondary pollution is not easily caused, the treatment and volume reduction effect of the wastewater and the slurry is good, the treatment and volume reduction efficiency of the wastewater and the slurry is high, the size of the sludge can basically be reducedby 50% or above within one month, a fixed plant is not needed, the treatment cost is low, the treatment capability can be flexibly adjusted, and the application range is wide.

The invention discloses a damage repairing construction method for cement flooring. The damage repairing construction method for the cement flooring comprises the following steps: cleaning a damage; repairing the damage and curing; brushing glue; paving an anti-crack mesh; leveling an intermediate layer; surviving a surface layer; performing secondary curing, wherein the material used for repairing comprises the following components in percentage by weight: 0.05 percent of 200-nm nano- silica fume, 55 to 85 percent of viscous cement, and 45 to 15 percent of 42.5# ordinary Portland cement and 801-glue with the glue-to-cement ratio of 0.4; the material used for the intermediate layer comprises the following components in percentage by weight: 0.05 percent of 200-nm nano-silica fume, 15.9 to 75.1 percent of emulsion compound emulsion anti-crack mortar, 85.1 to 24.9 percent of 42.5# ordinary silicone salt cement and 801-glue with the glue-to-cement ratio of 0.4. A paste slurry material prepared by the 200-nm nano-silica fume, and the viscous cement and the 801-glue in a certain ratio is used for repairing holes and depressions, and the 801-glue serves as an interface for adhering the flexible anti-crack mesh, so that the crack resistance of the flooring is improved, the flooring can be prevented from cracking, and the service life of the flooring is greatly prolonged.

The invention discloses a modular prefabricated spliced undercrossing tunnel. The modular prefabricated spliced undercrossing tunnel comprises tunnel shallow ship chute sections located at the two ends of the tunnel, a tunnel frame section located at the middle portion of the tunnel, and tunnel deep ship chute sections which are located on the two sides of the tunnel and connect the tunnel frame section with the tunnel shallow ship chute sections. Each tunnel shallow ship chute section comprises a plurality of shallow ship chute section prefabricated side plates which are arranged in the length direction of the tunnel and can be connected into a whole through a cast-in-place bottom plate. Each tunnel deep ship chute section comprises a plurality of deep ship chute section splicing units which are arranged in the length direction of the tunnel and can be connected into a whole through a cast-in-place bottom plate. The tunnel frame section comprises a plurality of frame section splicingunits which are arranged in the length direction of the tunnel and can be connected into a whole through a cast-in-place bottom plate. Through modular design of prefabricated plates of the shallow ship chute sections, the deep ship chute sections and the frame section, the chute sections are constructed and spliced into a whole; and splicing of tunnels which are located in different terrains and are different in length is facilitated, and field rapid splicing construction is achieved.

The invention discloses a flow construction method for forming a cast-in-place bored pile for a gravel-decomposed rock stratum in a double-machine combined mode. The flow construction method comprises the steps that a high-power hydraulic spiral drilling machine is adopted to conduct drilling; drilling is conducted to the design pile bottom elevation; the requirements of a design and related specifications for the length of the pile and a bearing course at the pile end are met; pore-forming is finished; a drilling rod is lifted out; residue soil produced by pore-forming with the high-power hydraulic spiral drilling machine is layered again and poured in a pile hole through equipment such as an excavator, the speed rate of backfill is controlled, and the filling quality of backfill soil to the pile hole is guaranteed; after a pile position is rechecked and set out again, a long spiral drilling machine is adopted to conduct drilling again on the backfill hole position and pile body concrete is pumped into the pile hole through the end of a drilling rod of the long spiral drilling machine; the pouring top face of the pile body concrete is 0.5-1 m higher than the design pile top elevation; after pumping is finished, a reinforcement cage is lowered to the design elevation trough the method that after vibrating, the reinforcement cage is inserted into the pile body concrete; and the steps are repeated, so that pile-forming flow construction is realized through the combination of the high-power hydraulic spiral drilling machine and the long spiral drilling machine.

The invention discloses a high-efficiency honeycomb type pile head breaking construction process. The construction process comprises the steps that in the process of processing and manufacturing a reinforcement cage, each main reinforcement and each sounding pipe of the reinforcement cage are each sleeved with an isolation sleeve; after completion of processing of the reinforcement cage, the reinforcement cage is put into a drill hole, concrete is poured into the drill hole to form a cast-in-place pile; a pit is excavated in seven days after pouring, steel wedge blocks are symmetrically and horizontally inserted and driven in the annular tangent positions until a pile head is separated from a pile body, and then the pile head is removed. According to the high-efficiency honeycomb type pilehead breaking construction process, the main reinforcements are sleeved with the isolation sleeves, and damage to the main reinforcements in the treatment process of the pile head is effectively avoided. Moreover, the operating process is simple, and the construction efficiency is high. Input of construction equipment is reduced. Construction noise is greatly lowered. Dust flying is prevented. The construction environment is improved. Health of construction staff is effectively protected.

Prefabricated steel reinforced concrete and reinforced concrete assembled bridge piers are provided with two connecting modes including bolt connection and connector connection, and each assembled bridge pier connected through bolts comprises a foundation, a first bottom section, a first middle section, a first top section and a bent cap. The assembled pier connected through the connectors comprises a foundation, a second bottom section, a second middle section, a second top section and a bent cap. The construction process of the prefabricated steel reinforced concrete and reinforced concreteassembled pier comprises the following steps that 1, components are manufactured, specifically, the first bottom section, the first middle section, the first top section and the bent cap are prefabricated, or the second bottom section, the second middle section, the second top section and the bent cap are prefabricated; 2, the components are mounted. The designed connection technology of the prefabricated sections and the foundation, the connection technology of the prefabricated sections and the connection technology of the prefabricated sections and the bent cap can guarantee that all the prefabricated parts are connected into a whole, and the structure is jointly stressed and deformed harmoniously.

The invention relates to a prefabricated pile foundation pier and a construction method thereof, comprising a prefabricated pile, a prefabricated bearing cap and a prefabricated pier column, wherein the pile foundation pier is integrally connected by a first connection structure for connecting the prefabricated pile and the prefabricated bearing cap and a second connection structure for connectingthe prefabricated pier column and the prefabricated bearing cap; the first connection structure connects the precast pile and the bearing cap into a whole, which ensures the reliability of the connection between the pile and the bearing cap, and at the same time satisfies the sufficient compression, bending and shearing capacity and certain tensile capacity at the pile top. The second connectionstructure connects the precast pier column with the cap, and ensures that the bottom of the pier has sufficient compression, bending, shear and ductility seismic capacity. Compared with the prior art,the invention is conducive to realizing the whole bridge segment assembly construction of the concrete bridge, improving the construction quality, greatly accelerating the construction process, shortening the construction period, reducing the adverse impact on the environment, reducing the construction noise and the like.

The invention discloses a fast and high-efficiency integrated ground. The fast and high-efficiency integrated ground comprises one or more groups of ground bases, a drainage tank, a wall side special-shaped water guiding groove, floors, a water tank cover plate and wall panels, the drainage tank is fixed between the two ground bases through a drainage tank fixing frame, the wall side special-shaped water guiding groove is formed in the position above the ground bases, the water tank cover plate is installed at the gap, above the drainage tank, between the floors, the wall panels are installedon the peripheries of the ground bases, and arranged in a frame body of the wall side special-shaped water guiding groove. According to the fast and high-efficiency integrated ground, the constructionperiod can be shortened, the construction noise is lowered, the construction environment is improved, meanwhile, the ground is elevated, integrated and modularized, waterproofing treatment is changedfrom the traditional containment type to the drainage type, repairing can be conducted in time when the seepage is found, and the recyclability is achieved.

The invention provides a manufacture method for a concrete irregular fender post, which belongs to the field of building and particularly relates to a fender post used for retaining soil and water and applied to a deep base pit project. The novel concrete irregular fender post is provided with a reserved hole. The cross section of a novel concrete maintaining post is approximately in a shape of a parallelogram, two semi-circular grooves are arranged on one inclined side, and two semi-circular protruding ribs are arranged on the other inclined side. The novel concrete irregular fender post is a prefabricated post, is good in compaction, anti-permeability and lateral pressure resisting capacity, and does not need repairing. The novel concrete irregular fender post is simple in construction method, connection between posts is compact, time is saved, labor is saved, a construction cycle is short, and a water retaining and soil retaining effect is better.

The invention belongs to the technical field of road exploitation and particularly relates to a static sounding construction technology for the pavement of an urban road. The static sounding construction technology for the pavement of the urban road specifically includes the steps of paying off in a positioned mode, tapping, installation of a counter-force device, leveling, static sounding and treatment after construction, wherein in the process of installation of the counter-force device, the corresponding ground position of the counter-force device is drilled with a hole through an electric drill, the hole diameter is matched with the diameter of an expansion bolt, the depth of the hole needs to be 5-10 cm larger than the length of the expansion bolt, and the counter-force device is mounted after drilling. Compared with the prior art, the static sounding construction technology for the pavement of the urban road can complete the static sounding construction operation of the pavement of the urban road quickly on the premise of not affecting normal traffic, primary data are provided for design of a next procedure, input of manpower and material resources is greatly lowered, and social influence is reduced. Therefore, the static sounding construction technology for the pavement of the urban road has the following characteristics that the range of damage to the pavement is small, the pavement is likely to recover, construction noise is low, and environmental protection and cleanliness are achieved.