2395results about How to "Improve construction safety" patented technology

The invention relates to an ecological protection method for a high steep side slope. The method mainly comprises the steps of slope surface treatment, concrete shotcrete and rock bolt support, vegetating hole arrangement, net spreading, spray material preparation, granule spray sowing, maintenance, management, and the like. In the method, guest soil materials such as humus loam rich in organic matters and clay are utilized to undergo a granule reaction after mixed with a granule agent at the moment of spray sowing so as to form a greening template which has the same high order granule structure as natural soil and strong erosion resistance and can suppress water and soil loss. After a diversified mature plant community which is in harmony with surrounding vegetation environment is formed, the slope surface can be protected, which can effectively resist diseases and insect pests and maintain the ecological balance. Post maintenance management and expenses can be saved. All used materials can be naturally degraded, have no pollution to the environment and can purify air and beautify the environment. Equipment of the method does not need to be hung on the slope surface for construction, and spray sowing operations are carried out only below the slope surface, thus the method has high construction speed and safety. The method is suitable for slope surfaces which are difficult to green, and the like, such as various high steep and unstable slope surfaces, bare slope surfaces having high greening expected values, and the like.

The invention discloses a bridge crack detection method. Due to the fact that manual marking has certain subjectivity, the pavement crack detection precision depends on experience knowledge of experts, and experience lacks objectivity in quantitative analysis. The method comprises the following steps: 1, collecting images of a detected bridge floor one by one to obtain a bridge floor image set; 2,splicing images; 3, detecting crack; 4, extracting crack parameter. According to the invention, the image acquisition and processing technology replaces human eyes to complete automatic nondestructive detection of the bridge crack, and has very important practical significance for research of the bridge crack detection technology in a complex terrain environment. On one hand, the construction safety is enhanced, and on the other hand, the operation maneuverability and flexibility are improved. According to the invention, fidelity splicing of multiple groups of bridge deck images is realized,the image splicing precision and efficiency are improved, a working foundation is laid for subsequent bridge crack image detection, and a technical reference is provided for image splicing detection in other fields.

The invention provides a hydraulic creeping formwork system and a creeping formwork construction method. The invention is characterized in that a climbing system is composed of four machine positions and a creeping formwork device attached to a wall surface, wherein machine positions are arranged on a transverse bridge edge; a formwork, a formwork moving bracket, a working platform, a hydraulic power device, a hydraulic platform and a decorative platform are arranged from top to bottom at the machine position side; on a longitudinal bridge edge, no machine position is arranged and only the formwork, the formwork moving bracket, the working platform and a man passageway connected to a climbing face hydraulic platform are mounted; and in a climbing process, the formwork and the working platform on the longitudinal bridge edge are driven to climb together with four sides by the four machine positions on the transverse bridge edge. The hydraulic creeping formwork system overcomes the defects of other hydraulic creeping formwork devices that mounting and dismounting are inconvenient and quantity of used hydraulic creeping formwork devices is large. The hydraulic creeping formwork system is simple in integral structure, is conveniently maintained and is conveniently mounted and dismounted.

The invention relates to a method for constructing a double-arch tunnel by rebuilding and expanding an existing single-hole tunnel. The technical problem to be solved by the invention is to provide a method for constructing the double-arch tunnel by rebuilding and expanding the existing single-hole tunnel, which adopts a ' middle pilot hole, the existing tunnel and a right hole' three pilot pit construction scheme, enlarges construction face and reduce excavation face and surrounding rock disturbed zone. To solve the technical problem, the invention adopts a technical scheme that the method for constructing the double-arch tunnel by rebuilding and expanding the existing single-hole tunnel comprises the following steps: 1.1 constructing the middle pilot hole parallel to the existing single-hole tunnel on one side of the existing single-hole tunnel and completing supporting construction; 1.2, constructing a left hole by sequence and zone on the basis of the existing single-hole tunnel and communicating the left hole and the middle pilot hole; and 1.3, after excavating the left hole to a certain size, constructing the right hole by sequence and zone and communicating the right hole with the middle pilot hole. The method is mainly used in highway traffic engineering and municipal traffic engineering.

The invention discloses a whole high-cleanliness electronic plant steel structure slippage and detachment method. A construction route of the ground assembly of a single truss, the aerial assembly and accumulative slippage of a slippage unit, the whole slippage of the slippage unit, and the synchronous detachment of the slippage unit is adopted, a long-span and large plant steel structure is mounted in high altitude above two layers of wafer boards. The method is characterized by comprising the following steps of a, the confirmation of a slippage and detachment scheme and the simulating calculation of the slippage and the detachment of the slippage unit; b, the accumulative slippage and the whole slippage construction of the slippage unit; c, the synchronous detachment and construction of the slippage unit in batches and in levels; d, the synchronous control on the whole slippage and detachment of the steel structure. By using the whole high-cleanliness electronic plant steel structure slippage and detachment method, the problems that a large-size crane cannot enter a hoisting field and reserved holes of wafer board floors, and the circumjacent construction plant of the field is limited are solved, the construction efficiency is greatly improved, the construction safety is ensured, and the engineering construction cost is reduced.

The invention discloses a continuous monitoring system of overburden rock displacement in an ore bed mining process, which comprises an inclination measuring drilling hole, an inclination measuring pipe assembly, a monitoring device and a monitoring station. When in use, a plurality of fixed inclinometers are arranged at different positions as required so as to realize the continuous whole-coursemonitoring on mined overburden rock displacement; meanwhile, the monitoring device for a flexible chain structure can be used for preventing the damage of overburden rock movement on instruments so as to ensure monitoring is carried out smoothly; and the monitoring system is used for evaluating the space-time influence degree of the mining to overburden rock so as to provide a basis for the judgment of the influenced degree and the safety of deep mining operation execution, facilities in an overburden rock stratum, ground facilities, and the like. In addition, the invention also discloses a method for structuring the monitoring system, wherein methods for embedding an inclination measurement pipe, carrying out anti-sliding safety protection during lowering the inclination measurement pipe, lowering the inclination measurement pipe when water or no water exists in the drilling hole, fixing the inclination measurement pipe by deep hole grouting, and the like not only effectively solve the problem of huge difficulty on installing deep-hole inclination measurement pipes, but also effectively improve the construction efficiency and the safety.

The pipeline repairing and reinforcing material includes repairing glue layer for repairing and leveling the outer pipeline fault; carbon fiber sheet painted or dipped with glue for restoring and raising the bearing strength of the fault part; and anticorrosive material layer for the outer surface. The repairing and reinforcing material of the present invention has specific strength and specific module near that of the metal pipe material, can bear the pressure inside the pipe together with the pipe and reach or even exceed the bearing capacity of the pipe. The present invention may be used in repairing pipeline without stopping conveyance.

The invention relates to the field of construction, in particular to a bridge and a construction method thereof. The bridge and the construction method of the bridge are provided to overcome shortcomings in construction methods of existing bridges, a conventional sequence construction method of performing cast-in-place construction of a beam body after bridge pier construction is finished is changed into a parallel construction operation method of a bridge pier and the beam body. The bridge comprises the bridge pier and the beam body, and the beam body comprises a precast beam body and two side span connecting segments respectively in butt joint with the head end and the tail end of the precast beam body. The bridge pier comprises side piers supported on end sides of the side span connecting segments and main piers symmetrically arranged on two sides of the end of the precast beam body, and a load-bearing beam for supporting the precast beam body is connected between the two main piers positioned on two sides of the end of the precast beam body. The construction method has the advantages of achieving the effects of shortening operating time and reducing cost at once, being high in work efficiency, being not subjected to limitation of a conventional construction process, reducing high-altitude operation difficulty and dangerous sources and improving construction safety for workers.

The invention relates to a method for water inrush prediction and seepage control for underwater-tunnel broken surrounding rocks. The method includes the steps of S1), exploring by adopting a geophysical exploration and advanced-level geological drilling method and performing tests; S2), establishing a saltation prediction model of analytic hierarchy grey correlation of water inrush of the surrounding rocks by adopting an analytic hierarchy grey correlation method; S3), establishing a three-dimensional porous continuous medium fluid-structure coupled finite element model of the underwater-tunnel broken surrounding rocks by adopting an orthogonal back-analysis method; S4), performing dynamic prediction and seepage control on water inflow of the broken surrounding rocks and performing intelligent fuzzy logic control and instability early-warning forecast on high-pressure water inrush of the broken surrounding rocks; S5), adopting comprehensive prevention and control measures. Compared with the prior art, the method has the advantages that instability of water inrush of the underwater-tunnel broken surrounding rocks under high water pressure can be predicted and subjected to economical, reasonable, safe and reliable comprehensive seepage control.

The invention relates to a method for investigating a tunnel, comprising the following steps: 1) obtaining 3-dimensional data on ground and geology; 2) generating DGME; 3) generating DLEM; 4) generating DTEM; 5) forming an overall 3-dimensional hardware model of the tunnel and selecting a tunneling solution; 6) generating a geological excavation entity; 7) establishing a forecasting model for geological entity section; 8) generating a 3-dimensional steel bar lining diagram of a complex structure; 9) generating a tunnel plane structure diagram: 10) generating a cut and fill entity with different construction stages, guiding tunnel design and construction. By the method of the invention, 3-dimensional effect and geological conditions of the tunnel can be directly obtained for exact, intuitive and convenient selection of the tunneling solution, thus effectively reducing rework, improve investigating quality, construction safety and tunnel stability, coordinating the tunnel mouth with the environment, remarkably improving design effects of a tunnel portal, a tunnel face and a tunnel trunk. As a result, the method of the invention can be widely applied to tunnel investigation, and in terms of engineering application, related softwares can be configured according to actual needs.

A technique for hoisting a strip-shaped inclined steel structure into place by a single crane, the following steps are adopted: 1. Calculate the weight and center of gravity position of the inclined tie bars; 3. Connect the upper ends of the slings with the hooks, and set sliding tail ropes at both ends of the inclined ties; 4. Set safety ropes at both ends of the chain hoist; 5. Slowly lift the crane and place The whole inclined ties slowly leave the ground; 6. After the slanted ties are lifted half a meter from the ground, they should stay for a few minutes; 7. Put the slanted ties in place to the installation position, and assemble the slanted ties accurately; 8; The hoisting is completed by welding and fixing the inclined tie bars. The present invention can complete the precise hoisting and positioning of the strip-shaped inclined steel structure by using a single crane, which solves the problem of using two cranes to adjust the inclination angle of the steel structure with a lighter tonnage; not only greatly reduces the construction cost, Moreover, the efficiency and safety of construction are also improved.

The invention relates to a steel roof truss, particularly relates to a double-layer spoke type space string-structure steel roof truss and a pre-stressed tensions method thereof, and belongs to the field of a steel structure. The side wall of a stand column is fixedly connected with an outer ring truss through an outer ring support; the outer ring truss is fixedly connected with an inner ring truss through an inner ring support; the bottom of the outer ring truss is provided with outer supporting rods which can be continuously distributed at intervals, wherein the bottom of the outer supporting rod at the innermost end is provided with an outer annular cable fastening device and the bottoms of the other outer supporting rods are provided with outer lower-chord radial fastening devices; the bottom of the inner ring truss is provided with inner supporting rods which are continuously distributed at intervals, wherein the bottom of the inner supporting rod at the innermost end is provided with an inner lower-chord ring beam fastening device; and the bottoms of the other inner supporting rods are provided with inner lower-chord radial fastening devices. The double-layer spoke type space string-structure steel roof truss and the pre-stress tensioning method thereof disclosed by the invention have the advantages of high construction precision, high construction efficiency and low construction cost, and improve the construction safety.

A monitoring and display system for a position and a three-dimensional attitude of a floating and semi-submersible type mobile platform comprises an RTK (real time kinematic) DGPS (differential global position system) positioning module which is used for obtaining positioning data of the mobile platform; a bidirectional gravity type inclinometer module which is used for obtaining longitudinal and transverse inclination data of the mobile platform; a wireless transmission module which is used for transmitting the positioning data and the inclination data to a synchronous collection and processing module; the synchronous collection and processing module which is used for collecting the positioning data and the inclination data synchronously and converting the positioning data into a presupposed type coordinate system; and a real-time three-dimensional animation and information display module which is used for dynamically displaying the position and the three-dimensional attitude of the mobile platform in real time in a three-dimensional simulation mode. By means of the GPS (global position system) and the animated simulation, the monitoring and display system for the position and the three-dimensional attitude of a floating and semi-submersible type mobile platform displays dynamically the position and attitude information of the mobile platform in real time, and has the advantages of being intuitional, efficient and highly-accurate, thereby largely improving the safety in construction and engineering efficiency, and having a high automaticity, an accurate measurement during work process and a wide prospect.

The invention relates to a high flashing point environment-friendly soluble polyurethane chemical grouting material, aiming at solving the technical problem of providing the high flashing point environment-friendly soluble polyurethane chemical grouting material which has the characteristics of high flashing point, non-flammability and good environmental protection performance on the basis of maintaining the original comprehensive performance of soluble polyurethane grouting material. The high flashing point environment-friendly soluble polyurethane chemical grouting material has the technical proposal for solving the technical problem: the material is characterized by comprising the components based on parts by weight: 10-35 parts of isocyanate, 30-80 parts of hydrophilic polyether, 5-30 parts of plasticizer, 10-50 parts of high boiling point composite solvent and 0.5-3 parts of foam stabilizer. The chemical grouting material is applicable to foundation seepage prevention treatment of large dams and other buildings, water burst treatment of subway and tunnel, etc.

The invention discloses a novel double shear wall deformation joint mould plate. Forming mould plate system on each side comprises a panel, wherein vertical wood keels are fixed outside the panel by iron nails, horizontal keels are arranged outside the vertical wood keels, the horizontal keels are made of steel pipes, and each two steel pipes are closely arranged; the two adjacent steel pipes of the forming mould plate system on one side are welded with a steel plate provided with a screw rod hole, a nut of a double-pulling screw rod is welded in the screw rod hole; the horizontal keels of the forming mould plate system on the other side are provided with a reverse M-shaped clip used to fix the double-pulling screw rod; the double-pulling screw rod passes through the forming mould plate system on the left side and the forming mould plate system on the right side, and is fixed by the steel plates and the nut in the reverse M-shaped clip; a wall plate thickness limitation support is arranged between the panels of the forming mould plate system on the left side and the forming mould plate system on the right side; the double-pulling screw rod is sleeved by a plastic sleeve, both ends of which are inserted in the panels of the forming mould plate system on the left side and the forming mould plate system on the right side respectively. The mould plate of the invention has the advantages of reasonable structure, cost conservation, short construction period, convenient use, flexible assembly, high repeated use rate and good constructional safety.

The invention provides an overhanging support frame formwork system and a construction method thereof. The overhanging support frame formwork system is used for pouring of overhanging members on an outer wall of a building. The overhanging support frame formwork system comprises a plurality of overhanging beams, pulling pieces and a whole-hall scaffold. The overhanging beams are fixed to a floor on the lower layer of a floor layer where the outer wall of the building is located through connecting pieces, the multiple overhanging beams are arranged side by side, and the space between the adjacent overhanging beams is smaller than or equal to a preset value. The pulling pieces are fixedly connected with structural beam built-in fittings of the floor layer where the overhanging members are located and overhanging sections respectively. The whole-hall scaffold is arranged on the overhanging sections of the overhanging beams to support a formwork for the overhanging members so that concrete pouring of the overhanging member can be achieved. According to the overhanging support frame formwork system, the space between the adjacent overhanging beams is not larger than the preset value, it is guaranteed that the overhanging beams cannot be broken off by loads, and therefore it is guaranteed that cost cannot be increased due to the large number of the overhanging beams, it is also guaranteed that the overhanging beams cannot be broken off by loads, and safety of building construction is improved.

The invention provides a thixotropic chemical sealing channeling agent. The sealing channeling agent comprises the following raw materials: 40 to 55 weight parts of iron rich low-carbon sulfur aluminate, 0.2 to 5.0 weight parts of sodium-based bentonite, 0.5 to 2.0 weight parts of fluid loss agent, 0.2 to 5.0 weight parts of white carbon black, 0.5 to 4.0 weight parts of cyclodextrin and/or starch and 30 to 50 weight parts of water. The chemical sealing channeling agent has the characteristics of strong adhesion and thermal stability, good durability, prominent cracking resistance and the like; the linear expansion rate reaches over 0.2 percent, the compressive strength reaches over 30MPa, and the shearing strength reaches over 10MPa; and by adding dispersant, fluid loss agent and thixotropic regulator, the sealing channeling agent has high thixotropic property and loss resistance.