2723results about How to "Reduce construction difficulty" patented technology

The invention belongs to the field of submarine routing planning, particularly relates to a pipeline routing line selection method and system based on a path planning algorithm and analytic hierarchy process, and aims to improve the routing line selection efficiency and precision and reduce the routing risk in the pipeline routing line selection process. The method comprises the following steps: establishing an evaluation sample matrix X based on measured value data of evaluation indexes, and converting pixel points of a target sea area topographic map into nodes of a two-dimensional matrix to obtain a grid obstacle map; establishing a submarine pipeline routing risk quantitative evaluation model; converting the sea area topographic map into a risk level grey-scale map through the risk quantitative evaluation model of the submarine pipeline; and carrying out route planning through a route planning algorithm based on the grid obstacle map, and finding a route with the minimum accumulated gray value in the target sea area risk level gray-scale map through a greedy algorithm to serve as a final route. According to the method, risk parameters are taken into consideration for the generated path, and finally, the obtained route is a routing path with small length and low overall risk.

The invention relates to the technical field of metal mine ultra-deep vertical shaft construction, in particular to an advanced pressure relief construction method for a metal mine ultra-deep vertical shaft, aims to solve the problems that the construction safety of a deep shaft is difficult to guarantee and the construction difficulty is high, and is used for a large-diameter vertical shaft with the depth exceeding 1500 m. The lithology and physical mechanics parameters of shaft surrounding rock are obtained by adopting methods such as shaft rock core logging, surrounding rock joint fissure investigation and rock mechanics tests; then mechanical properties of the shaft surrounding rock are analyzed, and shaft surrounding rock excavation disturbance stress field distribution characteristics are obtained; the supporting opportunity and the supporting thickness of the well wall concrete lining are determined, high stress accumulated in a rock mass is released through advanced pressure relief blasting, so that the stress state of the shaft surrounding rock of the non-lining section is actively regulated and controlled, the interaction between the shaft surrounding rock and the subsequent well wall concrete lining is weakened, and the construction difficulty is effectively reduced; various means such as shaft stratum transparency analysis and ground pressure disaster prevention and control early warning are adopted, and safety and high efficiency of digging and supporting construction of the ultra-deep shaft are guaranteed.

The invention discloses an earthquake monitoring linkage triggering device, and the device comprises an earthquake intensity instrument which is used for collecting an earthquake signal and outputting earthquake intensity; the sensor is used for collecting seismic activity data; the data acquisition host is used for processing the seismic intensity and the seismic activity data and transmitting the seismic intensity and the seismic activity data to the upper computer; and the upper computer is used for receiving, analyzing and displaying the seismic data. According to the invention, high-performance modular hardware is utilized, efficient and flexible software is combined to complete various testing work, signals of acquisition equipment are displayed and stored through the upper computer, seismic wave acquisition information is fused, data analysis and judgment are carried out, and earthquake monitoring can be comprehensively and automatically realized.

The invention relates to a construction method of a pile shoe. The construction method comprises the steps that a jig frame is manufactured; the pile shoe is divided into a plurality of structural assemblies, and the structural assemblies comprise a bottom plate assembly, a central top plate assembly, a buoyancy tank assembly, a plurality of large vertical plate assemblies and a plurality of peripheral top plate assemblies. A bottom plate assembly, a center top plate assembly, a buoyancy tank assembly, a plurality of large vertical plate assemblies and a plurality of peripheral top plate assemblies are prefabricated. The prefabrication of the bottom plate combination body is carried out on the jig frame, and the prefabrication of the other combination bodies is independently carried out. Assembling the combination bodies: after the bottom plate combination body and the jig frame are mounted, mounting the central top plate combination body on the bottom plate combination body, then mounting the buoyancy tank combination body on the central top plate combination body, then mounting each large vertical plate combination body, and finally mounting each peripheral top plate combination body. According to the method, the part distribution and sorting efficiency is greatly improved, the part sorting period is shortened, the construction period is shortened, and the construction cost is reduced.

The invention discloses a mountain gravity energy storage system and method for continuous operation of multiple weight blocks. The mountain gravity energy storage system comprises an inclined rail, a cableway support, a truck, standardized weight blocks, a high-altitude automatic loading and unloading platform, a low-altitude automatic loading and unloading platform, a motor generator set, a transmission mechanism and a control system. Standardized weight blocks serve as weight carriers, charging and discharging of the energy storage system are achieved through mutual conversion of gravitational potential energy and electric energy of the standardized weight blocks, rail transportation and cable transportation modes are combined, an automatic weight loading and unloading platform is arranged, and the carrying capacity of the weight carriers can be increased on the basis that the system operation continuity is guaranteed; the power and the capacity of the energy storage system are improved, manual establishment of a sand warehouse or a complex transferring and stacking mechanism is avoided, the cost is reduced, and the energy circulation efficiency of the system is further improved.

The utility model discloses a storage tank used for storing and transporting fluid, the storage tank comprises a wall and an internal containing space defined by the wall, the wall comprises a first layer assembly and a second layer assembly which are arranged in a stacked mode, the first layer assembly is located on the inner side of the second layer assembly, the first layer assembly comprises a first shielding layer and a first heat insulation module located on the outer side of the first shielding layer, the second layer assembly comprises a second shielding layer directly connected with the first heat insulation module and a second heat insulation module located on the outer side of the second shielding layer, and the first shielding layer and the second shielding layer are both made of metal corrugated plates. And crisscrossed corrugations are arranged on the metal corrugated plate. According to the storage tank, an invar plate is not adopted, the overall production cost is reduced, the problem that goods supply is difficult is solved, the two layers of corrugated metal plates both have good tensile strength, pressure caused by contents and airflow to the wall can be compensated, and the storage tank can keep good performance for a long time.

The invention relates to a construction method of an anti-typhoon sea wave sea-crossing steel trestle and platform adjacent to a residential building. The construction method comprises the steps that firstly, deep fusion application of BIM and VR is conducted; step 2, surveying and setting out; step 3, embedding steel bars and pouring strip-shaped concrete; fourthly, the steel pipe piles are transported and lengthened; fifthly, steel pipe piles are driven; sixthly, parallel connection and diagonal bridging construction is conducted; seventhly, bearing beams are installed; eighthly, longitudinal beams are installed; ninthly, the distribution beams are installed; tenthly, bridge deck slabs and guardrails are installed; and 11, an intelligent monitoring and early warning system.

The invention discloses a variable-cross-section stacked box rigid frame aqueduct, a cantilever hanging basket and a prestress tensioning method in the field of prestressed concrete aqueducts, the transverse section of a water passing groove is a U-shaped section, and the U-shaped section of the water passing groove is far superior to a rectangular section in the aspects of water delivery flow conditions and flow passing capacity; a prestress continuous rigid frame structure form of a U-shaped water passing upper tank with a variable cross-section rectangular lower tank stacked upwards and a guide groove unified cross section and a two-system four-way prestress system are arranged, the concrete stress of the upstream face of the U-shaped water passing groove can be accurately and effectively controlled to be kept in a uniform compression state with a certain numerical value, and the anti-seepage and durability functions of the aqueduct are ensured. According to the tensioning method, the vertical steel beams and the U-shaped steel beams are partially tensioned firstly, so that the aqueduct web has certain vertical pressure stress, then longitudinal prestress is tensioned, the effect of the vertical steel beams and the U-shaped steel beams is prevented from being weakened by the longitudinal prestress, and pressure stress reserve of the upstream face of the U-shaped groove is guaranteed; the pouring hanging basket prevents the formwork from floating or shifting in the pouring process of the variable-thickness middle partition plate.

The invention discloses an assembly type steel pipe inner core wrapped UHPC arch rib connecting node, an arch bridge and a method, the assembly type steel pipe inner core wrapped UHPC arch rib connecting node comprises hollow steel pipes, the hollow steel pipes are arranged in a sectional mode, the outer diameter of each section of hollow steel pipe is wrapped with a prefabricated UHPC outer wrapping layer, and field butt flanges are arranged at the connecting ends of the adjacent hollow steel pipes; the adjacent hollow steel pipes are connected through on-site butt joint flanges and connecting bolts, a plurality of steel pipe shear nails and flange stiffening steel plates are arranged on the outer diameters of the adjacent hollow steel pipes close to the connecting ends, the adjacent hollow steel pipes are sleeved with steel plates, steel plate shear nails are arranged on the inner walls of the steel plates, and cast-in-place UHPC outer wrapping layers are arranged at the connecting ends of the adjacent hollow steel pipes. The construction method has the advantages that the segment hoisting weight is low, the apparent durability is good, the construction measure investment cost is low, rapid construction of the high-prefabricated arch rib segments can be achieved, the construction quality can be guaranteed, the construction method is simplified, and the construction period is shortened.

The invention discloses a mountainous region photovoltaic array remote monitoring and fault early warning installation system which comprises a monitoring unit used for collecting operation data of a mountainous region photovoltaic array in real time, and a fault early warning unit used for judging whether the mountainous region photovoltaic array breaks down or not according to the data collected by the monitoring unit and sending out an early warning signal when the fault occurs. The remote monitoring center is used for receiving data transmitted by the monitoring unit and monitoring and managing the running state of the mountain photovoltaic array in real time, the installation support is used for installing the mountain photovoltaic array, the monitoring unit collects photovoltaic assembly and environment data in real time through various sensors, the data processing module carries out preprocessing and analysis, and the data processing module carries out real-time monitoring and management on the running state of the mountain photovoltaic array. And the data transmission module transmits data to a remote monitoring center in time, so that omnibearing and real-time monitoring of the running state of the mountain photovoltaic array is realized, the running condition of the mountain photovoltaic array can be mastered in time, and potential problems can be found.

The invention provides an anti-wind device for gas shielded welding and a welding system. The anti-wind device for gas shielded welding comprises a tube shell, the tube shell is arranged outside a gun head of a welding gun in a sleeving mode, and a shielding gas containing cavity surrounding the gun head is formed between the tube shell and the gun head; the casing pipe is arranged outside the pipe shell in a sleeving mode, and an airflow drainage cavity surrounding the outside of the pipe shell is formed between the casing pipe and the pipe shell; the air source connector is arranged on the sleeve and communicated with the airflow drainage cavity, and the air source connector is used for guiding airflow from an air source into the airflow drainage cavity; the airflow drainage cavity is used for guiding airflow in the axial direction of the gun head so that the airflow can form an air curtain on the periphery of the shielding gas containing cavity. The anti-wind device can achieve the anti-wind function on the shielding gas, and compared with the prior art, the construction difficulty can be reduced, the equipment resource configuration can be simplified, and the construction cost can be saved.

The utility model discloses a structure for modularized installation of photovoltaic panels on a color steel tile roof by using a composite material support, which comprises the color steel tile roof and a plurality of photovoltaic panels installed on the color steel tile roof through the composite material support, and the composite material support comprises a guide rail, a guide rail installation frame, a single-side positioning buckle and a double-side positioning buckle. By the adoption of the structure that the photovoltaic panel is installed on the color steel tile roof in a modularized mode through the composite material support, parts are few, construction difficulty is low, modularized installation of the photovoltaic panel is achieved, meanwhile, the guide rails are made of the glass fiber reinforced composite materials, cost is low, the weight is light, the deformation problem of the color steel tile roof can be avoided, and the service life of the color steel tile roof is prolonged. And meanwhile, the structural strength is equivalent to that of a metal material, the corrosion resistance is excellent, the long-term test of atrocious weather conditions can be resisted, the durability is realized, and the stability and the reliability of the installation of the photovoltaic panel are ensured.

The invention discloses a concrete modular integrated building connecting system which comprises connection of a plurality of concrete modular box bodies, each concrete modular box body is composed of a prefabricated top plate, a prefabricated bottom plate, a prefabricated beam, a prefabricated shear wall and a prefabricated partition wall, and each concrete modular box body is formed through integral pouring; a reserved post-pouring area is arranged at the joint of every two adjacent box components, and notches are formed in the prefabricated top plates; connecting steel bars are in lap joint with the notches, and concrete post-pouring is conducted after the steel bars are in lap joint; u-shaped notches are formed in the prefabricated beams, upper and lower lap joint steel bars are laid at the U-shaped notches, and the two half sections of the prefabricated beams are connected into a whole after concrete is cast in place; a linear vertical notch is formed in the prefabricated shear wall between every two adjacent box bodies, the rib bodies of the wall bodies are connected in the linear notches, all the box bodies are stably connected through lap joint of the reinforcing steel bars and cast-in-place concrete of the cavities, and the prefabricated shear wall is suitable for high-rise buildings, can reduce the workload of a construction site and has good mechanical performance and anti-seismic performance.

The invention relates to the technical field of building decoration engineering, in particular to a split combined type closed dovetail groove framework system which comprises at least two vertical parallel keel bodies, connecting pieces, connecting positioning hole sets, transverse connecting components and lifting adjusting assemblies, the cross section of each keel body is of a closed structure, a dovetail groove structure is arranged on one side edge of each keel body, and the dovetail groove structure is arranged on the other side edge of each keel body. Each keel body comprises a first connecting face and two second connecting faces, the first connecting faces and the dovetail ends of the dovetail grooves are located on the same plane, the second connecting faces are located on the two sides of the dovetail grooves respectively, and the connecting pieces are arranged between every two adjacent vertical parallel keel bodies. The two adjacent dovetail groove keel bodies of the closed structure are connected through the connecting piece, the torsional rigidity of the framework can be effectively improved, stress is reduced, the framework can be suitable for installation and adjustment when the ground is uneven through the lifting adjusting assembly, welding and cutting are not needed, and the construction difficulty and cost are reduced.

The invention discloses a metal storage tank welding jacking system and a construction method. The metal storage tank welding jacking system comprises a discharging device, a welding device, a jacking device, a steel plate rail and a plurality of steel stand column supports. The multiple steel stand column supports are arranged on the jacking device and can be integrally heightened, the jacking device is fixedly arranged on the concrete foundation and arranged outside the steel stand column supports in a sleeving mode, the discharging device is arranged on one side of the steel plate track, and a discharging opening of the discharging device communicates with the steel plate track. The steel plate track can support and push steel plates to rotate on the steel plate track, and the welding devices are movably arranged on the two sides of the steel plate track to weld the adjacent steel plates. According to the metal storage tank jacking system, inverted construction in traditional metal storage tank construction is avoided through the arrangement of the jacking device, storage tank construction of constructors is facilitated, meanwhile, a large amount of hoisting work in the traditional construction process is avoided through jacking of the jacking device, the hoisting cost is saved, and the construction difficulty is reduced.

The utility model discloses a pool prefabricated side plate, a side plate connecting structure and a cylindrical assembly type pool, the pool prefabricated side plate comprises an arc-shaped concrete plate body, an arc-shaped metal plate is integrally formed on the concave arc surface side of the arc-shaped concrete plate body in a pouring mode, and a reinforcing mesh layer formed by weaving a plurality of longitudinal reinforcing steel bars and a plurality of transverse reinforcing steel bars is pre-buried in the arc-shaped concrete plate body. The upper ends of the longitudinal steel bars extend out of the upper end face of the arc-shaped concrete slab body to form first steel bar connectors, and the two ends of the transverse steel bars extend out of the vertical faces of the two corresponding sides of the arc-shaped concrete slab body to form second steel bar connectors. The prefabricated side plate of the pool has good structural strength and good overall seepage-proofing and leakage-proof performance; the steel bar joints I are conveniently welded and fixedly connected with the steel bar joints on the outer peripheral surface of the pool top plate when the pool is built; the reinforcing steel bar joints II are convenient for welding and fixed connection between the adjacent pool prefabricated side plates when the pool side wall is built; the side plate connecting structure is ingenious and reasonable in structural design, and it is guaranteed that the cylindrical assembly type pool can be manufactured and implemented smoothly.

The invention discloses a construction method of an aluminum alloy formwork system for residential buildings. According to the construction method, the difficulty of assembly and disassembly construction and turnover use of aluminum alloy formworks can be reduced, and the construction quality and the construction efficiency of an assembly type structural system are improved. The construction method comprises the following steps: rechecking an axis and a wall line projected by a wall body according to a building design scheme, so that the axis and the wall line meet construction requirements; determining a wall body vertical reference line, and positioning a wall corner; a wall formwork system is installed, and perpendicularity is corrected; a beam formwork system is installed and corrected; a floor formwork system is installed and corrected; wall body concrete, beam body concrete, column concrete and floor slab concrete are poured, so that the wall body, the beam body, the column and the floor slab are connected into an integral structure; and the wall formwork system, the beam formwork system and the floor formwork system are dismantled, and the dismantled wall formwork system, the dismantled beam formwork system and the dismantled floor formwork system are conveyed to an upper-layer building for construction through a feeding opening.

The invention provides a retaining wall integrated structure, and relates to the technical field of road retaining walls. The bottoms of the prefabricated stand columns are inserted into soil, the inner sides of the prefabricated stand columns make contact with the soil, the left ends and the right ends of the prefabricated stand columns are connected with the prefabricated retaining walls, the prefabricated retaining walls are connected with the two prefabricated stand columns, and the inner sides of the prefabricated retaining walls make contact with the soil. The prefabricated anchor block is buried in deep soil in a backfilling mode, and the top of the prefabricated anchor block is connected with a steel wire rope. The prefabricated retaining wall is designed to be in an arc shape, force is better transmitted to the left prefabricated stand column and the right prefabricated stand column, the deformation amplitude of the prefabricated retaining wall is reduced, the prefabricated stand columns and the prefabricated retaining wall are connected together in a sliding and inserting mode, connection is easier, more convenient and faster, the construction time is effectively shortened, and the construction difficulty is reduced. The problems that a retaining wall commonly used on a road at present is generally integrally poured and built by concrete, a series of pouring procedures are needed, the whole construction period is long, and the road construction progress is affected are solved.

The invention discloses a V-shaped mud cabin drag suction dredger pumping channel structure which comprises a connecting pipe, a mud cabin pumping channel and a bow square rotating circle, one end of the mud cabin pumping channel is connected with one end of the connecting pipe, and the other end of the mud cabin pumping channel is connected with a mud pipe of a bow through the bow square rotating circle. The top face of the mud cabin pumping channel is of a double-top structure, the inner wall of the double-top structure, the inner side face of the mud cabin pumping channel and the inner bottom face of the mud cabin pumping channel are all smooth faces, the bottom structure of the mud cabin pumping channel is of a longitudinal continuous structure, and the bottom structure of the mud cabin pumping channel separates a mud door hinge point and rubber and provides support above the rubber. The double-top structure comprises a double-top structure lower top plate and a double-top structure upper top plate located above the double-top structure lower top plate. The upper portion of the double-top structure lower top plate is fixedly connected with the double-top structure upper top plate through rib plates or reinforcing ribs. The structure is few in hard points, uniform in channel shape, small in resistance, simple in construction process, high in pumping efficiency, safe and reliable. No protruding structure exists in the mud cabin, and mud unloading is smooth.

The invention relates to the technical field of cast-in-place piles and discloses a cast-in-place pile auxiliary construction device and method based on the ball hole expansion theory, and the cast-in-place pile auxiliary construction device comprises a supporting steel beam used for supporting a reinforcement cage and a support capable of being supported around a pile casing. According to the auxiliary construction device for the cast-in-place pile based on the ball hole expansion theory and the construction method, a first-section reinforcement cage provided with a grouting capsule is hoisted and put into a hole pile foundation well, the first-section reinforcement cage partially stretches out of a pile casing, a supporting steel beam penetrates through the lower portion of a stirrup of the first-section reinforcement cage and is supported on a cross beam, and the first-section reinforcement cage is located above a pile casing opening; the taking and placing assembly moves the sleeve to a main reinforcement of the first section of reinforcement cage, the extension section of reinforcement cage is hoisted to the position of the main reinforcement of the first section of reinforcement cage, the main reinforcement of the extension section of reinforcement cage is inserted into the sleeve, the sleeve is heated by a welding gun to be welded and fixed, the supporting steel beam is taken down, and the first section of reinforcement cage and the extension section of reinforcement cage which are connected continue to be put down. And the extension section reinforcement cage is continuously mounted, so that the reinforcement cage is convenient to mount.

A fabricated reinforced concrete prefabricated column connecting structure comprises a lower-layer prefabricated column upper section, an upper-layer prefabricated column lower section, cushion blocks, spiral positioning devices, stirrups, formworks, supporting fixing pieces and post-cast high-strength concrete. The lower-layer prefabricated column upper section, the upper-layer prefabricated column lower section, the cushion blocks, the spiral positioning devices, the stirrups, the supporting fixing pieces and the like are solidified together through post-pouring high-strength concrete to form the assembly type reinforced concrete prefabricated column connecting structure. According to the elevation of the upper section of the lower-layer prefabricated column and the post-pouring compaction requirement, the thickness of the cushion block is selected to control the elevation of the bottom of the upper-layer prefabricated column, horizontal positioning of the bottom of the upper-layer prefabricated column is accurately controlled through holes formed in the spiral positioning device of the pre-embedded steel rib support and the spiral positioning device pre-installed on the internal thread, and the construction precision is improved; high-strength concrete is adopted for post-pouring, the high-strength concrete fault-tolerant connecting technology is adopted for reinforcing steel bars, the lap joint and anchoring length is reduced, the construction difficulty is lowered, the engineering quality is guaranteed, and the construction progress is accelerated.

The present invention relates to a double-walled steel cofferdam with no bottom and a construction method for deep-water rock capping platform rotary excavation. The BIM three-dimensional simulation technology is used to accurately design the size of the cofferdam module and the position of the preset holes, which greatly improves the accuracy and efficiency of the construction. By solving the problems of module size and layout in the design stage, the installation and commissioning work on site can be significantly reduced, thereby speeding up the construction progress and ensuring the quality of the project. The quick connection method of prestressed tendons and extruded waterproof strips is adopted between the cofferdam modules, which saves a lot of welding work, not only improves the construction efficiency but also reduces the construction difficulty. The guide device used for the lowering of the cofferdam is used for horizontal and vertical displacement and inclination monitoring, which can help the cofferdam lowering process more accurately, and greatly improve the construction efficiency and safety. The comprehensive slotting method of impact drill, rotary drilling drill and grab bucket greatly improves the slotting efficiency and reduces the slotting difficulty.

The invention discloses a method for machining steel cylinders with different plate thicknesses. The method comprises the steps that S1, parts are blanked and machined, specifically, the parts are cut through gas cutting or plasma cutting, and random spot check is conducted on site when the parts are blanked every time; s2, a cylinder pipe rolling and circle returning process which comprises the steps that S21, preparation work before cylinder rolling is conducted; step S22, rolling a cylinder; step S23, welding a longitudinal seam of the cylinder; step S24, secondary roundness correction of the cylinder; and S3, cylindrical pipe fitting assembly, specifically, S31, cylindrical pipe fitting assembly front requirements are met; step S32, carrying out a cylinder assembly construction process; s33, carrying out nondestructive testing on the cylinder welding seam; step S34, cylinder precision control; step S35, measuring the size of the cylinder; and S4, the cylinders are subjected to mark spraying treatment, and the cylinders are warehoused after being subjected to user inspection or final inspection. The manufacturing problem of large-diameter steel cylinders with different thicknesses is solved; the construction difficulty is reduced, and the manufacturing efficiency is improved.

According to the roof waterproof external member and the roof structure, the construction efficiency of the roof waterproof external member is higher, and the waterproof reliability of the roof structure is higher. The roof waterproof external member comprises at least two groove-shaped members and at least one prefabricated member, the groove-shaped members are the same in structure, and the prefabricated member is provided with a prefabricated member groove body. The groove inner side surface of the groove-shaped part and the groove outer side surface of the prefabricated part groove body are covered with waterproof films; when the two groove-shaped pieces are arranged in parallel, the top end of the second groove wall of the first groove-shaped piece can be connected with the top end of the first groove wall of the second groove-shaped piece, so that the first groove wall and the second groove wall form a wave crest; the shape of the groove body of the prefabricated part is matched with the shape of the wave crest, so that the groove body of the prefabricated part can be buckled on the wave crest, and the waterproof film of the groove-shaped part and the waterproof film of the prefabricated part form a continuous waterproof film layer in the buckled state.

The utility model relates to the technical field of photovoltaic construction devices, in particular to a photovoltaic pile foundation positioning construction device which comprises a fixed base, an operation base is arranged above the fixed base, and the fixed base and the operation base are connected through a plurality of supporting positioning rods. The supporting and positioning rod comprises a first hinge block, a supporting sleeve rod, a second hinge block, a supporting sleeve and a first bolt, second connecting blocks are symmetrically arranged on the lower surface, close to the supporting and positioning rod, of the operation base, and the two second connecting blocks are rotationally connected with the upper surface of the fixed base through the fixed sleeve; and a perforating machine is arranged between the two second connecting blocks in a sliding manner. According to the utility model, the punching angle of the punching machine can be adjusted by supporting the positioning rod and rotating the fixed sleeve rotationally connected below the punching machine, so that a pile body can vertically enter a soil body, the condition that the pile body is inclined is avoided, the construction difficulty of operators is greatly reduced, and the characteristics of the pile body can be better embodied.

The invention discloses a heat preservation integrated assembly type roof structure and a construction method thereof, and relates to the technical field of building roof structures, the heat preservation integrated assembly type roof structure comprises a supporting frame, a heat preservation layer, a waterproof layer and a concrete protection layer, the supporting frame is fixed to a building main body structure, and the heat preservation layer comprises a plurality of roof panels which are spliced with one another; the roof panel is made of high-strength lightweight concrete, a heat preservation plate is embedded in the roof panel, a fixing structure used for fixing the roof panel is arranged on the supporting frame, the waterproof layer is laid on the heat preservation layer and covers the whole heat preservation layer, and the concrete protection layer is laid on the waterproof layer and covers the whole heat preservation layer. And a gap between the supporting frame and the building main body structure is sealed. The method has the advantages that efficient assembly construction can be achieved, the construction period is remarkably shortened, the field operation amount is reduced, and the construction efficiency is improved.

The invention relates to a large deep foundation pit rotating trestle and a construction method, the large deep foundation pit rotating trestle comprises a trestle body and a supporting body, the supporting body and the trestle body are integrated, the supporting body is arranged below the trestle body, and the trestle body is divided into a straight section, a rotating slope section and a soil slope ramp; the straight sections are arranged on the edge of the top of the foundation pit, between the two rotating slope sections and at the tail ends of the rotating slope sections respectively, the rotating slope sections are arranged between the two straight sections, the tail end of the last straight section is provided with a soil slope ramp, and the soil slope ramp is directly communicated with the bottom of the large deep foundation pit. The trestle has the beneficial effects that the trestle occupies a small area of the deep foundation pit, bottom construction of the deep foundation pit is not affected, the construction difficulty of the deep foundation pit is reduced, the construction efficiency is high, the bearing capacity is high, the construction transportation capacity of the deep foundation pit is improved, the transportation efficiency is improved, and the construction progress of the deep foundation pit is accelerated.

The invention relates to a wind-resistant cable structure convenient to install on a pedestrian suspension bridge and a construction method of the wind-resistant cable structure. The method is suitable for the field of pedestrian suspension bridge design and construction. According to the technical scheme, the wind-resistant cable structure convenient to install on the pedestrian suspension bridge is characterized by being provided with a main beam, the main beam is hung on a main cable through slings, wind-resistant main cables arranged in the length direction of the main beam are arranged on the two sides of the main beam, the two ends of each wind-resistant main cable are anchored to the ground through wind-resistant anchors, and the wind-resistant main cables are connected with the main cable through the wind-resistant anchors. First connecting pieces are sequentially arranged on the wind-resistant main cable in the length direction of the wind-resistant main cable, second connecting pieces are sequentially arranged on the main beam in the length direction of the main beam, at least one inhaul cable structure is arranged between the main beam and the wind-resistant main cable in the length direction of the main beam, and each inhaul cable structure is provided with an inhaul cable. The inhaul cable shuttles between the first connecting piece on the wind-resistant main cable and the second connecting piece on the main beam.

The invention belongs to the technical field of ultra-high performance concrete, and particularly relates to low-shrinkage recycled aggregate ultra-high performance concrete as well as a preparation method and application thereof. The low-shrinkage recycled aggregate ultra-high performance concrete is prepared from the following raw materials in parts by weight: 840 to 860 parts of Portland cement, 140 to 160 parts of silica fume, 320 to 480 parts of natural river sand fine aggregate, 320 to 480 parts of recycled fine aggregate, 400 to 560 parts of natural basalt coarse aggregate, 240 to 400 parts of recycled coarse aggregate, 18 to 22 parts of water reducing agent, 40 to 60 parts of carbon fiber, 140 to 160 parts of steel fiber and 420 to 640 parts of water. The replacement rate of the regenerated fine aggregate for replacing the natural river sand fine aggregate is 40-60%, and the replacement rate of the regenerated coarse aggregate for replacing the natural basalt coarse aggregate is 30-50%. The prepared ultra-high performance concrete is good in fluidity, good in construction performance, low in shrinkage, high in strength and high in durability, the used recycled aggregate can save energy, cyclic utilization of waste is achieved, the method for treating the aggregate saves energy and reduces emission, and the ultra-high performance concrete is suitable for large-scale application and popularization.

The invention discloses a working face end head top plate weakening anti-scour method, which adopts a mode of performing hydraulic slotting in a surrounding rock top plate of a roadway dangerous area of a working face end roadway to form a pressure relief slot, a retarding slot and a far-field dynamic load source breaking and expanding slot so as to improve the anti-scour capability of the working face end roadway. A pressure relief slot formed by hydraulic slotting on a roadway top plate can release static load of roadway surrounding rock, and a retarding slot formed by hydraulic slotting on a dynamic load propagation path can retard far-field dynamic load from being propagated to the roadway. The far-field dynamic load source breaking and expanding seam groove formed by hydraulic slotting in the rock mass near the dynamic load source can reduce the elastic energy density of the rock mass near the dynamic load source and reduce the possibility of roof breaking. According to the method, the energy capable of inducing the rock burst disaster can be jointly reduced in the three aspects of the generation condition of the dynamic load, the propagation path of the dynamic load and the static load of the surrounding rock, and the method is particularly suitable for solving the rock burst problem of the end roadway of the working face.