16results about How to "Avoid construction risks" patented technology

The invention relates to a rock mass gas blasting method based on stress wave guidance. The method is suitable for the technical field of geotechnical engineering and mining. The technical problem to be solved by the invention is to provide the rock mass gas blasting method based on stress wave guidance. According to the technical scheme, the method comprises the steps that stress wave simulation is conducted on the basis of geological conditions of a target rock mass, and a stress wave simulation result of the rock mass is obtained; determining an arrangement mode and an excitation working mode of an ultrasonic excitation source and a low-frequency excitation source based on the type of the rock mass, the crack propagation target depth and the stress wave simulation result of the rock mass; wherein the low-frequency excitation source is used for reducing the rigidity of the surface of a rock mass through low-frequency excitation, increasing micro-deformation and initial micro-cracks of the rock mass, creating conditions for propagation of ultrasonic waves and locally guiding the formation position of the cracks; the ultrasonic excitation source is used for enabling ultrasonic waves to effectively reach the deep layer of the rock mass by utilizing the high penetrability of the ultrasonic waves to excite the expansion of microcracks.

The invention relates to the technical field of transport rolling unloading operation, in particular to a ship unloader berthing rolling unloading system and method.The ship unloader berthing rolling unloading system comprises a rigid string protection mechanism and a rolling unloading mechanism, and the rigid string protection mechanism is arranged at the edge of a transport ship; the rolling unloading mechanism comprises a deck bridge head, a sleeper, an ashore bridge head, a slope track and a rigid gap bridge, and the deck bridge head is fixedly arranged on the transport ship and corresponds to the deck track; the sleeper is fixedly arranged on the berthing wharf, the ashore bridge head is arranged at the top, one end of the rigid gap bridge is hinged to the ashore bridge head, the other end of the rigid gap bridge is in free lap joint with the deck bridge head, one end of the slope track is located on the wharf track, and the other end of the slope track is located on the sleeper and connected with the ashore bridge head. By changing the traditional roll-roll loading mode of jacking, steering and rail falling and the conventional berthing mode of the transport ship, the effect that the ship unloader unloads the ship from the transport ship conveniently is achieved, the ship unloading risk of the ship unloader is reduced, and the working efficiency of roll unloading operation of the ship unloader is improved.

The invention provides a half-through concrete filled steel tube arch bridge lattice beam construction method, which optimizes the division of construction segments of a lattice beam, prevents the lattice beam from being installed in place by avoiding arch ribs and cross brace structures among the arch ribs, and enables each construction segment of the lattice beam, especially an arch rib intersection segment, to move to an installation position through horizontal and vertical displacement. Therefore, the arch rib intersection section does not need to be inclined at a large angle to penetrate through the arch rib, and the construction risk caused by unbalanced stress of a lifting point or no stress of the lifting point in the large-angle inclined lifting process of the arch rib intersection section is avoided. And meanwhile, the hoisting capacity is designed by combining with a cable crane, the total number of construction segments of the lattice beam is reduced by dividing the optimized lattice beam segments, the hoisting frequency is reduced, the weight of the construction segments of the lattice beam is close to that of the arch rib segments, and then the construction efficiency is improved, and the construction cost is reduced.

The invention relates to a control method and a control system for a hydraulic tensioner, the control method comprises the following steps of: regulating and controlling the processes of brake starting, constant tension spreading, reverse traction and delivery and on-load stopping of the hydraulic tensioner, and the control system can realize the control method; by adopting the control method and the control system of the hydraulic tension machine, the hydraulic tension machine can be stably loaded and spread at constant tension, and can be in a completely static pressure maintaining state when the hydraulic tension machine is stopped with load; the problems that in the prior art, a tensioner is insufficient in control stability, safety risks exist when braking is started, and uncontrolled wriggling exists when on-load stopping is conducted are solved.

The invention relates to the technical field of virtual reality, in particular to a three-dimensional modeling space simulation system and method of a smart building, dynamic BIM data of a to-be-interacted building is collected according to a UE engine, a remote control instruction and an energy consumption evaluation instruction are completed for the dynamic BIM data of the to-be-interacted building, illumination simulation environment analysis is completed according to simulation environment elements, and a simulation result is obtained. The simulation environment elements are subjected to personalized correction; establishing a mapping key value pair for the correction parameter and the simulation environment item ID, and sending the mapping key value pair to a plurality of simulation sensor sets; and when the BIM data of the to-be-interacted building is randomly acquired, acquiring related reference simulation environment elements from the time sequence environment model according to the BIM data, and returning the reference simulation environment elements to the to-be-interacted building. According to the method, the fitness of the virtual reality technology in the engineering design building simulation environment training is evaluated, so that the energy consumption generated by building operation is reduced, the design cost and the construction cost are reduced, and meanwhile, subsequent design errors and construction risks are avoided.

The present invention discloses a plugging string for an open-hole well, comprising a delivery string, a separation device, a suspension support device, a plugger, a check valve and an open-hole wellbore; the delivery string, the separation device, the suspension support device, the plugger and the check valve are connected in sequence and then lowered into the open-hole wellbore. At the same time, the present invention provides a plugging method for a plugging string for an open-hole well, firstly, a positive well wash is performed, and drilling fluid is injected from the delivery string; then, a ball is cast to pressurize the delivery string, 7-9 MPa is pressed into the delivery string to anchor the suspension support device; 12-14 MPa is pressed into the delivery string to make the plugger seal the open-hole wellbore; 18-19 MPa is pressed into the delivery string to separate the separation device into two bodies. The present invention has a simple process, is convenient and fast, and fundamentally avoids the construction risks, wellbore complexity and oil layer damage caused by the use of suspended cement plugs, and can safely and efficiently perform operations such as sealing and isolation in an open-hole wellbore that needs to seal the lower invalid well section or leaking layer.

The invention relates to the technical field of large-span cantilever slab construction, and aims to solve the problems of large disassembly and assembly workload, small layout spacing and difficult passage, high risk of edge operation and inadequate quality control of concrete forming at cantilevered parts in a method of supporting cantilever slabs with full-floor scaffolding, and provide a large-span cantilever slab edge formwork device and a large-span cantilever slab edge formwork method, the large-span cantilever slab edge formwork device comprising a column bracket arranged on a lower structure floor slab, the bottom of the column bracket being connected to a position on the lower structure floor slab corresponding to the lower structure beam; a horizontal cross bar bracket being connected to the top of the column bracket, the horizontal cross bar bracket being abutted against the formwork of the upper structure beam, and an oblique brace being connected between the horizontal cross bar bracket and the column bracket; a slab bottom secondary rib being arranged between the horizontal cross bar bracket and the formwork of the upper structure floor slab, the bottom of the slab bottom secondary rib being connected to the top surface of the horizontal cross bar bracket, and the top of the slab bottom secondary rib being abutted against the bottom surface of the formwork of the upper structure floor slab.

The invention discloses a multi-stage main drive retaining design method for shield in-ground docking, relates to the technical field of shield tunnel engineering, and is used for performing main drive retaining reinforcement on a preceding shield during shield in-ground docking, and the shield in-ground docking is divided into two stages based on the distance between the preceding shield and a following shield. A retaining steel plate is arranged along the outer surface of the main drive in the first stage, when the left and right reaction torque oil cylinders are not disassembled, the main drive retaining steel plates of the upper semicircle and the lower semicircle are installed firstly, the main drive left and right reaction torque oil cylinders are disassembled in the second stage, the retaining steel plates continue to be arranged at the vacant positions, and theoretical support is provided for reinforcing and retaining construction of the main drive. Therefore, the safety and the stability of the advanced shield tunneling machine structure in the butt joint process are ensured. Furthermore, by designing the plane size of the main drive retaining steel plate, determining the welding seam range, determining the retreating force of the telescopic oil cylinder in the first stage and the second stage, checking and determining the thickness, the number and the distance of the retaining steel plates in the first stage and the second stage and the like, the scheme can be actually applied to the ground and is suitable for industrial popularization.

The present application relates to the technical field of tunnel engineering, in particular to a kind of soft weak surrounding rock shallow-buried unsymmetrical pressure tunnel portal section excavation method, comprising the following steps: S10, slope excavation tunnel excavation contour line above the natural slope of arch top and support;S20, vertical steel pipe pile is built outside tunnel excavation contour line on the side of mountain;S30, set range in tunnel arch portion is built reinforced concrete arch cap;S40, the slope toe of the reinforced concrete arch cap on the side of mountain that has been excavated and supported is backfilled;S50, build tunnel outside retaining wall;S60, the upper part of the reinforced concrete arch cap is backfilled and counter-pressured;S70, tunnel subsurface excavation and support are carried out.The present application can reduce the disturbance of lower construction to slope, avoid the construction risk of dangerous deep foundation pit engineering, improve construction reliability, speed up construction progress and protect ecological environment.

The present invention provides a rope saw buffering and shock absorbing device for underwater cutting and a construction ship, and relates to the technical field of underwater operation. The present invention solves the technical problems of low underwater cutting efficiency, easy saw jamming, and equipment damage in the prior art. The rope saw buffering and shock absorbing device for underwater cutting includes a main support, a slide bar, a rope saw guide wheel, a shock absorbing and buffering structure, and a lifting frame. When the distance between the deck and the workpiece of the construction ship is enlarged under the action of waves, the rope saw used for underwater cutting can pull the middle guide wheel bypassed by the rope saw and drive the lifting frame to slide upward along the slide bar through the middle guide wheel. When the distance between the deck and the workpiece of the construction ship is reduced under the action of waves, the lifting frame slides downward along the slide bar under the action of gravity. The present invention has the advantages of high underwater cutting efficiency, no easy saw jamming during sawing, and long equipment service life.

The application relates to the technical field of bridge construction equipment, in particular to a prefabricated and assembled rhombic hanging basket and a mounting method thereof. The rhombic hanging basket comprises a main truss system, a walking system, a bottom basket platform, a suspension system and a composite anchoring system. The mounting based on the rhombic hanging basket comprises the following steps: prefabricating a foldable rhombic truss; using a hoisting device to pull the truss to unfold and pin shaft locking; installing a walking system and other components, using multiple frequency conversion winches to cooperate with displacement sensors, and using a synchronous deviation control algorithm to hoist the bottom basket platform as a whole. In the hanging basket, the rhombic truss can be folded and unfolded, the convenience of transporting and installing the hanging basket on site and putting into construction is improved, the walking system and the composite anchoring system are matched, the efficiency of moving the hanging basket is improved, the automatic synchronous control technology solves the hoisting control problem of the bottom basket under complex environment, the construction efficiency and safety of the hanging basket as a whole are improved, and the risk of high-altitude operation is reduced.

The application provides a remote control method and device for a high-pressure valve for fracturing, which comprises the following steps: acquiring a valve state and fracturing construction data; determining a fracturing construction state based on the fracturing construction data; when the fracturing construction state is a normal state and an operation instruction is received, adjusting the valve state in response to the operation instruction; the operation instruction is generated by an operator based on the fracturing construction data; when the fracturing construction state is an abnormal state, prohibiting valve operation and determining an abnormal type according to the valve state and / or the fracturing construction state. The fracturing construction state is determined based on the fracturing construction data, and the remote operation instruction is executed in the normal state to control the valve state, the valve operation is prohibited in the abnormal state, the construction risk caused by improper operation is avoided, and the abnormal type can be determined to provide timely abnormal suggestions for the operator.

The invention discloses an automatic slurry start-stop control system of a trenchless horizontal directional drilling machine, relates to the technical field of automatic slurry start-stop control systems of drilling machines, and solves the problems of high construction cost, high energy consumption and low efficiency of a traditional drilling machine directly driven by a diesel engine. Comprising a slurry hydraulic valve, a slurry pump, a slurry sensor, a holder oil cylinder, a holder oil cylinder pressure sensor, a holder oil cylinder control valve, a rotation control system and a rotation motor, the slurry pump is fixedly connected with the slurry hydraulic valve, the slurry hydraulic valve is linearly connected with the slurry sensor, and the holder oil cylinder is fixedly connected with the holder oil cylinder control valve. And the holder oil cylinder control valve is linearly connected with the clamping oil cylinder pressure sensor, so that the personal injury of constructors in the construction process caused by forgetting to close the slurry in the rod unloading process is reduced, the construction risk caused by forgetting to open the slurry is avoided, the slurry loss caused by forgetting to close the slurry is reduced, and the construction cost is saved.

The invention discloses a non-welding photovoltaic support and application thereof, and relates to the technical field of photovoltaic supports. Comprising a pile foundation, a front stand column, a rear stand column, a plurality of hoops, a cross arm, a front inclined strut, a rear inclined strut and an inclined beam. Wherein the hoops are arranged on the pile foundation in a sleeving mode at intervals, the cross arm is located above the hoops and located at the top of the pile foundation, and the cross arm and the two ends of each hoop are connected with the front stand column and the rear stand column correspondingly; one ends of the front inclined strut and the rear inclined strut are respectively connected with two ends of the inclined beam, the other ends are respectively connected with two ends of the lowermost hoop, and the middle part of the inclined beam is respectively connected with the top ends of the front upright post and the rear upright post; all the assemblies are detachably connected through preset connecting holes and bolt structures. The defects of an existing welding process are overcome, fireless, rapid and adjustable connection of the support and the pile foundation is achieved through modular mechanical connection design, the fireless construction requirements of special scenes are met, and the construction efficiency and later adjustability are improved.

The invention relates to a large-span railway box bridge jacking overhead construction method and construction equipment thereof. A jacking working pit is excavated in one side of an existing railway box bridge; a first-stage working pit foundation bottom plate is poured in the pit, and a newly-built railway box bridge is poured on the first-stage working pit foundation bottom plate; an overhead device is erected between the top of the existing railway box bridge and the top of the newly-built railway box bridge, an uplink overhead rail beam and a downlink overhead rail beam at the top of the overhead device are hoisted, and temporary traffic is recovered; a second-stage working pit foundation bottom plate is poured on the inner side of the first-stage working pit foundation bottom plate, and a pushing device is arranged on the outer side of the newly-built railway box bridge; and the newly-built railway box bridge is transversely jacked to the second-stage working pit foundation bottom plate through the jacking device to abut against the existing railway box bridge, and then permanent traffic is recovered. The overhead device between the newly-built railway box bridge and the existing railway box bridge is constructed through the longitudinal and transverse beam system, the length requirement of large-span railway box bridge jacking construction is met, the overall structure is safe and reliable, and construction operation is convenient and easy.

The utility model belongs to the field of power transmission line iron tower assembling construction, and particularly relates to a tower section connecting node and a segmented assembled tower, the condition of a lower tower section main material can be monitored and fed back in real time through a distance measuring instrument and a camera which are installed on the upper tower section main material, and constructors can check the state of the tower in real time through a displayer. The requirement for repeatedly climbing and descending the tower is reduced, so that the workload and physical output are reduced, and the construction efficiency is remarkably improved due to the fact that the time for repeated operation and high-altitude operation is shortened. And a real-time monitoring and feedback system enables the construction process to be smoother and more coherent, so that the construction progress is accelerated. The distance measuring instrument and the camera can provide remote monitoring and measuring functions, so that a constructor does not need to carry out high-risk operation below the on-load suspension arm, and the construction safety is improved.