43results about How to "Construction noise is small" patented technology

The invention discloses a vibratory hammer device. The device comprises a support, a vibratory hammer, a second pulley component, a winding plant and a balancing weight, wherein a first pulley component is installed on the support, the first end of the vibratory hammer is connected with the first pulley component, and the second end of the vibratory hammer is provided with a fixing structure used for fixing an inner pipe and an outer pipe; the second pulley component is installed on the support, the winding plant is installed on the support and connected with the vibratory hammer through the second pulley component and can apply a vertically downward force to the vibratory hammer, and the balancing weight is detachably connected to the vibratory hammer. In this way, construction noise is low, construction efficiency is high, and the dead weight of a hammer body can be adjusted flexibly to meet the requirement for pile forming. The invention further discloses a shaking press type pile body construction method adopting the vibratory hammer device.

The invention discloses a construction method for forming grooves and holes and replacing large-diameter piles with small-diameter piles. The method mainly includes the steps of forming the grooves in an underground continuous wall with the aid of a DTH hammer, forming the holes in the large-diameter piles with the aid of the DTH hammer and replacing the large-diameter piles with the small-diameter piles equivalently through the DTH hammer. Compared with a conventional groove and hole forming method, the construction method has the advantages that the defects that rock entering efficiency is low, holes are deviated, the hammer is stuck and even holes are difficult to form in the construction process under the comprehensive complicated geological conditions such as high-rock surface layers, hard stratums and slope stratums can be effectively overcome, the rock entering construction efficiency during grooving of the underground continuous wall and hole forming of the large-diameter piles can be greatly improved, the technical problems of the rock entering groove and hole forming construction under the complicated geological conditions such as high rock surface layers and hard stratums are solved, the construction quality is stable and reliable, the requirements for safety civilization and environmental construction are met, and economic loss and construction time loss of a project can be effectively avoided.

The invention discloses a cavity-type common vibration sound absorption board wall structure and construction method. The structure comprises a wall body, an I-beam layer, a steel wire net and a light steel dragon skeleton from inside to outside, wherein a plurality of spring isolators are arranged between the wall body and the I-beam layer, the wall body is provided with a plurality of embedded parts, and both ends of each spring isolator are fixedly connected with the embedded parts and the I-beam layer respectively; the I-beam layer comprises a plurality of vertical I-beams arranged along the surface of the wall body in order, and the I-beam layer is fixedly connected with the light steel dragon skeleton through a fixing device; a shock absorbing rubber pad is arranged between the bottom of the I-beam layer and the ground, and a cement sound insulation board is arranged between the light steel dragon skeleton and the ground; the lattice of the light steel dragon skeleton is stuffed with environment-friendly and waterproof sound absorbing cotton, and the sound absorbing cotton is wrapped with sound absorbing nonwoven fabrics; a sound absorbing board is fixed on the outer side of the sound absorbing non-woven fabrics, and a fireproof board is arranged on the light steel dragon skeleton. The cavity-type common vibration sound absorption board wall structure has the advantages of a good sound insulation effect, a wide sound absorption range, small environmental pollution, convenient construction, a high utilization ratio of unit material, high overall cost performance, and energy saving and environmental protection.

The invention relates to a synchronous-grouting pre-stressed pipe pile. The synchronous-grouting pre-stressed pipe pile comprises a special pile shoe device, a prefabricated pipe pile, a grouting pipedevice and a grouting layer; the special pile shoe device comprises a main grouting pipe, branch pipe joints, branch pipes and grout discharging holes; the upper end of the main grouting pipe is connected with the grouting pipe device; the lower end of the main grouting pipe is connected with the branch pipes via the branch pipe joints; each branch pipe is connected with the corresponding grout discharging hole; the grout discharging holes are uniformly distributed at an equal interval in the outer side of a pipe pile juncture at the edge of a pile shoe; the grouting pipe device is arranged inside a cavity of the prefabricated pipe pile; and the grouting pipe device comprises a four-claw hook, an upper end interface, a grouting pipeline and a lower end interface. The synchronous-groutingpre-stressed pipe pile provided by the invention has the beneficial effects that the synchronous-grouting pre-stressed pipe pile is a novel pile foundation which is formed by adopting a pile jacking-in method and is additionally provided with a special pile shoe based on an original pre-stressed pipe pile; by synchronous grouting, the sidewall of the pipe pile can be lubricated by grouting liquid,so the difficulty of pile pressing is reduced, and the requirements on the bearing capacity of a place and the requirements on pile pressing equipment are reduced.

The invention provides a recoverable and modular deep foundation pit construction process, a recoverable module and a deep foundation pit support and belongs to the technical field of deep foundation pit excavation and supporting. The process comprises the following steps that a foundation pit is dug down; a first anchor cable hole is formed, a first anchor cable is put in, and a grouting stop plug is installed for grouting; a second anchor cable hole is formed, a second anchor cable is put in, and a grouting stop plug is installed for grouting; modules and connecting fasteners are installed; a prestressing force is exerted to the first anchor cable and the second anchor cable to for a first layer of supporting; the operations are repeated to form multiple layers of supporting; modules, anchor cables and connecting fasteners of the last layer of supporting are recovered, soil is backfilled to the bottom surface of the second layer of supporting till the first layer of supporting is recovered. A soil body surrounding a deep foundation pit is supported and retained by adopting the modules and anchor cables jointly, the modules can be recycled, and materials waste and construction cost are reduced.

The invention discloses a vibrating-press-type sinking construction method. The vibrating-press-type sinking construction method is characterized in that according to the compactness of soil, vibrating hammer equipment is adopted, and by use of the self-weights of a hammer body of the vibrating hammer equipment and a balancing weight detachably mounted on the hammer body and corresponding to the compactness of the soil, at least one of an inner pipe and an outer pipe which are nested together is subjected to vibrating-press operation to the designed standard height so as to realize pipe sinking. According to the design, the self-weight of the corresponding balancing weight is increased or adjusted on the basis of the conventional vibrating hammer equipment according to different soil compactness to achieve the purpose that one set of the vibrating hammer equipment adapts to construction in different soil characteristics to meet the design requirements, so that not only is the construction efficiency guaranteed, but also the construction cost is lowered. The invention also discloses a vibrating-press-type pile construction method adopting the vibrating-press-type sinking construction method and the vibrating hammer equipment for the vibrating-press-type pile construction method.

The invention discloses a soft soil foundation reinforcing method based on cement concrete cored piles. Multiple cement concrete cored piles, vertically distributed, are adopted to reinforce a soft soil foundation; and the method comprises the steps of: (1) prefabrication of the cored piles; (2) conveying of the cored piles; and (3) reinforcement of the foundation: the cement concrete cored pilesare constructed by adopting an integrated cored pile machine; and when any one cement concrete cored pile is constructed, six steps of placement of the pile machine in place, construction of cement stirring piles, shifting of the pile machine, installation of the cored piles, vertical placement of the cored piles and pressing of the piles are carried out. The method is simple in step, reasonable in design, convenient for construction, high in construction efficiency and excellent in use effect; after prefabrication of all the cored piles, the integrated cored pile machine finishes the construction of the cement stirring piles in the cement concrete cored piles and the pressing process of the cored piles, so that the construction speed is high; and the verticality of the cored piles in thepile pressing process is easily controlled, so that the quality of the formed cement concrete cored piles can be effectively guaranteed, and the reinforcing effect of the soft soil foundation is guaranteed.

The invention discloses a production method of lightweight concrete prefabricated big panels. The method comprises the following steps: 1, selecting raw materials according to a case that every cubic meter of lightweight concrete prefabricated big panels contains 450-550kg of cement, 65-195kg of stone flour, 3.25-9.75kg of a water reducer and 0.01-0.05kg of a foaming agent, foaming the foaming agent, uniformly mixing cement, the stone flour and the water reducer to prepare a cement mortar, adding the foamed foaming agent to the cement mortar, and uniformly stirring the foamed foaming agent and the cement mortar to prepare lightweight concrete; and 2, pouring the lightweight concrete in a die, and carrying out demolding treatment and curing to produce the lightweight concrete prefabricated big panels. The method solves the problem of adverseness of too large weight of common prefabricated big panels to transportation and hoisting installation, the weight of the lightweight concrete prefabricated big panels produced in the invention is about 50% lower than that of common concrete prefabricated big panels, and the construction efficiency of prefabricated wallboards is effectively increased.

The invention provides a deep foundation pit retaining wall structure. The deep foundation pit retaining wall structure comprises a barrel-shaped retaining wall body, a water pipe through from top tobottom is arranged in the barrel-shaped retaining wall body in a poured mode, and the water pipe is provided with a water outlet which is located in the lower end face of the barrel-shaped retaining wall body and a water inlet which is located in the upper end face of the barrel-shaped retaining wall body. By means of the design, on one hand, water can be injected into a soil body located on the lower end face of the barrel-shaped retaining wall body through the water pipe to soften the soil body, so that the purpose of reducing the end resistance of the barrel-shaped retaining wall body is achieved, and then sinking of the barrel-shaped retaining wall body is facilitated; on the other hand, the softened soil body can further facilitate excavation, and the construction progress is improved; moreover, scouring can be carried out on the soil body located below the lower end face by using a method of injecting high-pressure water flow, so that the barrel-shaped retaining wall body sinks by virtue of gravity; and in this way, the purposes of reducing construction procedures, reducing construction noise, shortening the construction period and then reducing pollution to the surrounding environment can be finally achieved. The invention further discloses a construction method of an underground space.

The invention provides a drilling and splitting excavation construction method. The method comprises the steps of drilling an adjacent empty layer hole along the contour line of a tunnel; selecting ahorizontal drilling and splitting excavation scheme or a vertical drilling and splitting excavation scheme or an annular drilling and splitting excavation scheme according to the rock grade differencedistribution condition of a tunnel face, and determining an initial excavation area; making a hole distribution scheme of corresponding split holes according to the rock grade of the drilling and splitting area of the tunnel face; splitting the adjacent empty layer hole and the split holes in the initial excavation area by using a drilling and splitting machine; tunneling the split initial excavation area; and drilling, splitting and tunneling the tunnel face except for the initial excavation area. According to the method drilling and blasting construction is replaced by drilling and splitting construction, so that the construction noise is reduced, the damage to construction personnel is reduced, the construction safety is guaranteed, meanwhile, a reasonable construction sequence is setaccording to the rock grade difference of the tunnel face, and the construction efficiency of drilling and splitting excavation is improved.

The invention discloses a grooving tool which comprises a handle rod and a corresponding tool bit. The tool bit comprises a groove type chisel head connected to the handle rod, and the groove type chisel head is bent towards one side by one angle relative to the axis of the handle rod. The grooving tool is simple and reasonable in structure, convenient to use and high in construction efficiency and construction quality, and the influence on and the damage degree of constructed objects are small.