283results about How to "Reduce construction safety risks" patented technology

The invention discloses a real-time monitoring and early warning system of a subway station foundation pit and a monitoring and early warning method thereof. The monitoring and early warning system comprises an on-site sensor arranged in the foundation pit. The field sensor transmits the acquired foundation pit data to a front-end data acquisition module and a front-end data processing and transmitting module; the front-end data processing and transmitting module is used for transmitting the data to a data processing center and a foundation pit monitoring and early warning management platform, and the foundation pit monitoring and early warning management platform is connected with a foundation pit BIM model to realize corresponding mapping of the measurement data in the model; the monitoring and early warning method comprises the following steps that a foundation pit excavation time-varying BIM model is built, a control network is built, information interaction is carried out, real-time visual monitoring of the BIM model 4D is achieved, the foundation pit monitoring and early warning management platform carries out calculation and analysis according to actual measurement data, and construction process simulation or prediction analysis is carried out. According to the method, through the BIM technology, the dynamic processes of foundation pit excavation, support system construction and construction equipment are closely connected with foundation pit monitoring to form a whole.

The invention provides a self-anchoring type mounting method of a suspension bridge. The method comprises the steps of constructing a main pier and a side pier; erecting beams and splicing through a crane; mounting a medium supporting pier of a side span steel box beam; mounting the side span steel box beam; mounting a temporary steel tower; mounting a main span steel box beam and a temporary cable; mounting a main cable and a lifting cable; converting the systems. The method is free of the limitation of navigation of a waterway; an ultrahigh bracket cannot be constructed in the river at a gorge region with steep bank slopes, so that the input is reduced; the longitudinal moving load can be decreased, and the longitudinal moving range, so that the long-distance and large-tonnage propping and pushing can be avoided, and as a result, the risk of construction safety in longitudinal moving can be reduced; a propping pushing bracket can be avoided being scoured by flood and floating articles, so that the safety risk of construction is reduced, and the construction is sped up.

The invention discloses a foundation pit monitoring, early warning and construction management D-BIM platform integrated with a Beidou high-accuracy positioning system. Firstly, through the foundationpit D-BIM platform, the excavation progress of a foundation pit, construction of a foundation pit supporting and protecting system and the influence of surrounding buildings on construction of the foundation pit are reflected in real time; secondly, a real-time monitoring system is composed of the Beidou high-accuracy positioning system, mapping equipment, a stress-strain sensor, a groundwater stage gauge and the like, monitoring signals are collected by the D-BIM platform in real time, and a database is built; thirdly, monitoring data of the foundation pit deformation database can be directly retrieved and analyzed through the D-BIM platform, and when the monitoring data are larger than an early warning threshold value, an alarm is directly given out; and fourthly, the D-BIM platform cantransmit a model to software of finite element analysis in real time, and the foundation pit supporting and protecting system, groundwater movement and the stability of the foundation pit are analyzed and forecasted. According to the foundation pit monitoring, early warning and construction management D-BIM platform integrated with the Beidou high-accuracy positioning system, the correlation between the supporting and protecting structure and the stability of the foundation pit in the construction process can be visually displayed through the D-BIM model, early warning is achieved for potential safety hazards, and field management decision makers can be effectively helped to find problems and take corresponding remedial measures.

The invention discloses a no-balance-weight horizontal-rotation construction method of a steel truss girder bridge spanning a railway operating line. The construction method comprises the following construction steps: 1) the design and the construction of a rotation body facility at the rotating end is conducted, wherein the rotation body facility at the rotating end comprises a rotation body running track girder and a pier top facility No.25; 2) the design and the construction of a rotation body facility at the rotating shaft end is conducted, wherein the rotation body facility at the rotating shaft end comprises a positioning shaft, a bearing arm brace, a slide ship, a slide way and a pier pillar widening structure; and 3) the design and the construction of a rotation body running mechanism is conducted, wherein a rotation process adopts a walking type incrementally-launching running mechanism, and the running mechanism comprises the slide ship, a slide groove, an incrementally-launching hydraulic oil cylinder and an incrementally-launching counterforce device. Through technical economy comparison and selection, the invention adopts the construction scheme that a steel truss girder is assembled at a high level on the lateral side of the railway operating line by using a bracket method, and the girder is lowered and emplaced after being rotated to a design position by using the no-balance-weight horizontal-rotation method.

The invention discloses a few-circulation sling graded tension construction method of a concrete self-anchored suspension bridge. Sling tension adopts few-circulation graded tension control; grading refers to that each sling is tensioned in three stages; sling force of an ideal sling is P, and then the tension is conducted in three stages, namely 2 / 4P, 3 / 4P and P; and few-circulation refers to that the 74 slings of the whole bridge are tensioned in three batches totally; a sling tension facility and a main sling saddle pushing facility are required to be designed and constructed before tension construction; the sling tension facility comprises tension arm braces, tension jacks, tension nuts, and tension extension bars; and a counterforce rack is the key device in the main sling saddle pushing construction. With the adoption of the few-circulation sling graded tension construction method of the concrete self-anchored suspension bridge, the time of sling tension is reduced to 3; the construction method has the advantages that (1) the times of the repeated sling tension and cable saddle pushing are reduced; (2) a construction safety risk is reduced; (3) a construction period is shortened; (4) the occupation of project department personnel and machine resources is reduced; and (5) the construction cost is lowered.

The invention discloses a pouring machine and a pouring method for concrete of a road shoulder on a high-speed railroad bed section. The pouring machine comprises a rectangular frame, wherein a hopper is arranged on the upper front part of the rectangular frame; a generator is arranged on the rear part of the rectangular frame; a pair of travelling wheels are respectively arranged on front and rear sides under the rectangular frame and are just arranged on a travelling rail on a railroad bed cable slot; an operating shelf is hinged with one side of the rectangular frame; an auxiliary wheel is arranged on a longitudinal beam outside the operating shelf; and a paving scraper, a vibrating operation pedal, a leveling roll and a plaster plate are successively arranged above the operating shelf from front part to rear part. During a pouring process, the travelling wheels of the frame and the travelling rail on the railroad bed cable slot are arranged on the railroad bed in a matching form, the operating shelf is placed bias above a concrete pouring area and the auxiliary wheel is arranged on a side slope of the railroad bed; the hopper is used for receiving and storing materials and the concrete is poured into the pouring area through a discharging port; the paving scraper is used for uniformly paving and scraping the concrete; after vibrating, the leveling roll is used for upward leveling the downward flowing concrete; and lastly, the plaster plate is used for realizing the smoothing of the concrete surface.

The invention provides a fabricated cast-in-place concrete sandwich insulation wall steel frame formwork system (for short, a system) and connecting parts. The system is mainly composed of a concrete protection layer, an insulation layer, a truss, horizontal steel bars and non-dismantling cement boards or formworks. The insulation layer is formed by assembling insulation modules (boards) in a tongue-and-groove insertion mode, each insulation module (board) is fixed to one side of the truss through the connecting parts, and the concrete protection layer is laid outside the insulation layer. Each connecting part comprises a connection tap bolt, a positioning disc and a wire mesh fixing head, wherein a limiting protrusion is arranged on the outer side of the positioning disc. The system can be horizontally assembled on the ground, poured to be molded and integrally hoisted, the truss can be one part of steel bars of a bearing wall, after bearing wall concrete is poured, the system and the concrete structure are integrated, and the concrete composite wall with a sandwich insulation layer is formed. By means of the fabricated cast-in-place concrete sandwich insulation wall steel frame formwork system and the connecting parts, construction procedures of the sandwich insulation composite wall of an energy-saving building can be made simple, the easy construction property is high, the overall construction speed and labor efficiency of the energy-saving building can be greatly improved, construction safety risks are reduced, construction precision is effectively improved, and engineering quality is guaranteed; and meanwhile, technical support is provided for building industrialization.

The invention discloses an intelligent scheduling decision-making method and decision-making system for vehicles in a port operation site. The method comprises the steps of vehicle application, personnel allocation, task issuing, vehicle entry, vehicle monitoring, task feedback, vehicle scheduling, task updating, task ending and vehicle warehouse entry. The system belongs to the technical field ofvehicle intelligent scheduling and management, and comprises a data processing module, a vehicle application module, a GPS positioning module, a voice intercom module, a video monitoring module, a vehicle scheduling module and an APP module. According to the invention, the problems of inaccurate vehicle monitoring, unintelligent scheduling, unknown actual situation and the like in the prior art are solved; management of the project in the aspect of vehicle use is improved, the use condition of each vehicle is monitored in real time, reasonable distribution and timely exchange of work are ensured, remote dispatching and long-time idle standby state are avoided, and standardization, informatization and intellectualization of vehicle management are promoted. Meanwhile, the system is easy toinstall, maintain and operate, stable in operation, safe and reliable to use to the maximum extent.

A high pier sliding and turning integrated construction formwork system comprises steel pipe upright pipes (2) embedded in concrete (1). The steel pipe upright pipes (2) penetrate cross beams of carrying frames (3) and penetrate hydraulic jacks (4) installed on the cross beams of the carrying frames. A surrounding ring (6) is fixed to the side surface of each carrying frame, a work platform (7) is laid above each surrounding ring, and a decorative lifting basket (8) provided with an automatic sprinkling maintenance device (9) is installed below each surrounding ring. Each formwork (13) is located on the inner side of the corresponding carrying frame and adjusted through connection of hydraulic levers (10) capable of transversely adjusting the position of the formwork and the corresponding surrounding ring. The top end of each formwork is lifted to the cross beam of the corresponding carrying frame through lifting rods (11) capable of transversely sliding along the part of the cross beam of the corresponding carrying frame. Steel channels for filling of rubber rods are arranged below the formworks. After the formworks are installed, the rubber rods are compressed to be tightly attached to the concrete poured last time. The formwork system is high in safety, good in construction appearance quality, good in maintenance effect and capable of greatly improving the construction efficiency and effectively preventing paste leakage in the concrete pouring process.

The invention discloses an accurate excavation method for a gentle slope inclined shaft. The accurate excavation method comprises the steps that expanding excavation is carried out on a lower adit andan upper adit; a hole guiding and drilling are carried out by a directional drilling machine; a MWD inclinometer and an RMRS rotating magnetic field distance measuring system are adopted for drill bit positioning; hole guiding forward reaming is carried out by a raise boring machine; and then the raise boring machine is used for reverse expanding excavation of a pilot shaft, the pilot shaft is used for slag sliding and is parallel to the bottom of a designed contour line of an inclined shaft bottom plate, forward control of blasting excavation is carried out after the pilot shaft is communicated, and finally, slag sliding is completed. According to the accurate excavation method for the gentle slope inclined shaft, the method of directional drilling, inverse shaft expanding and forward blasting excavation is adopted for the 30-45-degree gentle slope inclined shaft, the pilot shaft is arranged on the inclined shaft bottom plate, the slagging-off efficiency is effectively improved, an included angle between an excavation tunnel face and the horizontal plane is 20-30 degrees, and blasting rock ballast is conveniently accumulated to the bottom and slides to the lower adit along the pilot shaft; the maximum blasting work amount is reduced through segmented blasting, and the rock ballast shaft blocking risk is reduced; forward one-time blasting excavation is carried out, and the blasting procedure construction time is shortened; and the construction efficiency is effectively improved, and the construction safety risk is reduced.

The invention discloses a large-tonnage steel truss arch segment non-moving lifting method based on cable hoisting system accurate calculation. A segmental catenary numerical iteration method and a tower top cable force continuation method are adopted for conducting cable hoisting system construction stage accurate calculation; by means of the method, steel truss components of different positions and different weights are lifted and installed successfully, the dosage of cable hoisting system suspension clasp tower system materials is less, selection of the size of a cable main load-bearing rope is reasonable, the construction cost is greatly reduced, the construction efficiency is improved, wide-range traction after load lifting is reduced through component non-moving lifting, the construction safety risk is lowered to the maximum extent, the problems that for a traditional lifting technology, cable system and suspension clasp tower system arrangement is conducted according to the maximum lifting weight, a larger number of materials are used, and the control difficulty is high are solved, and the method is a lifting method which is closer to practice, scientific and reasonable.

The invention discloses horizontal deep hole stage slicing and caving mining method and stope for crushing a thin ore body. The method comprises the following steps: arranging the stope along the orebody, and arranging an ore gathering roadway at the bottom of the stope; arranging footway ventilation shafts at both ends of the stope; arranging a cutting well and a cutting lane in the middle of the ore gathering roadway, wherein the cutting well communicates with the ore gathering roadway through the cutting lane; in the footway ventilation shafts, arranging drilling chambers at intervals along the height direction, and arranging horizontal medium-deep holes in the drilling chambers; adopting medium-deep hole slicing for cutting blasting and undercutting blasting to provide compensation space. The method can quickly recover the stope, avoid the safety hazard of the operation in the stope by adopting an original shallow-hole shrinkage method, greatly improve the mining operation efficiency, simplify the ore removal bottom structure, and improve the undercutting and ore removal efficiency; the method is suitable for crushing the thin ore body of a steep slope, can improve the safetyof the operation and the ore recovery rate, and can effectively reduce the loss rate and the dilution rate.