966results about "Protective construction" patented technology

An airport for a vertical take-off and landing aircraft includes three or more windbreak walls that extend radially about a reference axis, and three or more take-off and landing areas for the vertical take-off and landing aircrafts, which are partitioned by two adjacent windbreak walls among the three or more windbreak walls.

The invention discloses a reinforcing device before dangerous rock removal and treatment, which comprises at least two pairs of fixed anchor rods, the two pairs of fixed anchor rods are arranged in a matrix, the two pairs of fixed anchor rods are embedded in dangerous rock, the two pairs of fixed anchor rods are externally connected with a protective net, and the reinforcing device further comprises a pair of traction anchor rods arranged between the two pairs of fixed anchor rods. The invention relates to the technical field of dangerous rock reinforcement, the drilling, cooling and grouting functions are integrated through the hollow anchor rod, and the rock mass damage risk is reduced through single-point construction; the flexible connection system can effectively resolve the rock mass displacement stress; a gapless interception system is formed by the double-layer structure of the protective net and the blocking net, and falling stone impact energy is dissipated by the hydraulic buffer device in a grading manner; according to the design of the split type positioning hanging rings and the quick-release pins, modularized quick replacement of the protective net is achieved, the construction complexity is reduced through the standardized anchor rod assembly, the requirement for the number of anchoring points is reduced through cooperative bearing of the traction anchor rods and the fixed anchor rods, and the dangerous rock reinforcing safety and the construction efficiency are remarkably improved.

The utility model relates to the technical field of landslide collapse protection, and discloses a landslide collapse protection device which comprises a protection net. The supporting part is arranged on one side of the protective net, the supporting part is connected with the protective net, and a pressure sensor is arranged in the supporting part; the fixing part comprises a plurality of air cylinders and fixing seats, the fixing seats are arranged on the lower portions of the protective net, the supporting part and the air cylinders correspondingly, and the ends, away from the fixing seats, of the air cylinders are fixed to the sides, away from the protective net, of the supporting part; the controller is arranged on the supporting part, and the controller is electrically connected with the pressure sensor and the air cylinder. The supporting part is arranged on one side of the protective net, and meanwhile the fixing part is arranged, so that the supporting force of the device on a slope body can be improved, and high-strength impact can be well resisted; and secondly, a pressure sensor is arranged in the supporting part, pressure data of the slope body on the protective net are monitored in real time, when the pressure data exceed a preset pressure value, a controller controls an air cylinder to extend so as to enhance falling stone blocking, and practicability is high.

The invention relates to the technical field of displays, and provides a traffic display screen, which comprises a main body, the lamp strip is used for emitting light with different colors; the supporting pieces are arranged on the main body, the supporting pieces are used for installing the lamp strip, the number of the supporting pieces is multiple, and the multiple sets of supporting pieces are sequentially arranged on the main body; the mounting assembly is used for mounting and separating the supporting piece and the main body; after the multiple sets of supporting pieces and the main body are installed through the installation assembly, one set of supporting pieces in every two adjacent sets of supporting pieces moves relative to the main body, and the other set of supporting pieces is fixed relative to the main body. When one group of supporting pieces moves relative to the main body, a gap is formed between two adjacent groups of supporting pieces. When the display screen is blown by strong wind, the strong wind can enable the movable supporting piece to move, the interval is generated between the movable supporting piece and the fixedly-installed supporting piece, then part of the wind passes through the display screen through the interval, the blowing force of the wind on the whole display screen is reduced, and therefore the display screen can be conveniently and rapidly installed. Therefore, the display screen is prevented from loosening due to large-amplitude shaking.

The present application discloses a method for measuring impact force of debris flow and application, and a design method for barrier energy dissipation pile array. The method for measuring vertical impact force of debris flow measures the tangential velocity of debris flow at the impact point to measure the vertical impact force distribution of debris flow on the impact point. Further, the design method for pile array simplifies the free section of energy dissipation pile as a cantilever beam, which generates a bending resistance when impacted by debris flow, and the bending resistance continuously works to dissipate the impact kinetic energy of debris flow. According to the motion characteristics of debris flow, the impact time and distance parameters are further derived to solve the problems of measuring and designing the stability parameters of single energy dissipation pile, the energy dissipation parameters of barrier energy dissipation pile array, and the number parameters of barrier energy dissipation pile array. The present application also provides the application of each measuring and designing method. The present application provides a more scientific and perfect solution for the energy dissipation design of barrier energy dissipation pile array to resist the impact damage of rockfall and debris flow caused by landslide disaster.

The invention relates to the field of wind and sand prevention and control, in particular to a desert photovoltaic large base peripheral prevention and control system and method. The prevention and control system comprises a main air guide direction prevention and control system and a secondary air guide direction prevention and control system; the main wind direction prevention and control system is sequentially provided with three high vertical sand blocking fences, a lateral anti-lateral quicksand fence, a first sand stabilization grid area with a grid structure, two first plant sand blocking forest belts, a first plant sand stabilization area and a windproof sand blocking dust suppression fence in the direction from the upwind direction to the photovoltaic base. And the secondary wind guide direction prevention and control system comprises a second sand stabilization grid area, a second plant sand blocking forest belt and a second plant sand stabilization area. The sand prevention system can effectively solve the problems that an existing sand prevention technology is low in efficiency, unsustainable and the like, erosion and damage of sand grains to photovoltaic panels and infrastructures are reduced, the power generation efficiency is improved, the maintenance cost is reduced, long-term stable and efficient operation of a desert photovoltaic large base is guaranteed, and powerful support is provided for energy development and ecological protection balance in the desert area.

The invention belongs to the technical field of side slope protection equipment, and particularly discloses an energy dissipation buffer device for a side slope flexible protection net, the energy dissipation buffer device comprises a connecting rod, a connecting cylinder, an elastic piece and a rope, the connecting rod comprises a traction section and an extending section, the extending section is of a screw rod structure, the connecting cylinder comprises a cylinder body and a disc body, a first through hole is formed in the closed end of the cylinder body, and the elastic piece is arranged in the first through hole; a tooth block matched with the spiral groove is arranged on the first through hole; the cylinder body is arranged on the extending-in section in a sleeving manner, and the extending-in section can penetrate out of the first through hole; when the stretching-in section moves along with the traction section and penetrates out of the first through hole, the tooth block slides in the spiral groove, and linear sliding motion of the stretching-in section is converted into rotation of the barrel; the elastic piece is located in the cylinder, one end of the elastic piece is attached to the stretching-in section, the other end of the elastic piece is attached to the cylinder, and one ends of the ropes are fixed to the traction section. The four core pain points of'one-time consumption, low energy dissipation efficiency, high maintenance risk and concentrated local stress' of a traditional slope buffering technology are effectively solved.

A sediment control device is disclosed. The device includes an elongate fabric and a plurality of sleeves attached to the fabric. The plurality of sleeves extend generally perpendicular to a longitudinal axis of the fabric and are configured to receive a stake for securing the sediment control device to soil. Each sleeve is spaced a distance from an adjacent sleeve. In use, the fabric is laid out along a soil path, a bottom portion of the fabric is trenched into soil, and the stake is inserted into each sleeve such that the sediment control device is secured to soil. The bottom portion can then be backfilled.

The invention relates to the technical field of highway tunnel photovoltaic snow protection shed tunnels, in particular to a highway tunnel photovoltaic snow protection shed tunnel self-heating regulation and control method which comprises the steps that the actual value of the accumulated snow thickness is collected, the estimated accumulated snow thickness value and the expected value are obtained, and when the actual expected value is smaller than the estimated expected value, the photovoltaic snow protection shed tunnel self-heating regulation and control method is started. And carrying out heating power adjustment on the photovoltaic panel partition based on the difference value. Through combination of multi-dimensional accumulated snow detection and regional accurate heating, the accumulated snow removing efficiency is improved, the heating energy consumption is optimized, stable operation in extreme weather is guaranteed, and the complex working condition requirements are met. In addition, the invention also provides a storage medium, an electronic device and a computer program product to implement the method.

An avalanche triggering apparatus having a tower, a detonation chamber, and gas supply lines that are configured to deliver fuel gas and oxidizer to the detonation chamber. The flow is gas is controlled remotely, and a spark plug is configured to ignite gases within the detonation chamber based on the flow of fuel gas through a flow switch that acts as a sensor. The detonation chamber has a closed, rounded top and an open bottom end that is configured to face a snow surface. The detonation chamber is connected to the tower via mounting brackets and two pairs of isolator springs. Each isolator spring is comprised of a helical cable isolator that is inserted through a plurality of holes in two aluminum members in a helical configuration. The tower is comprised of at least two sections that are secured together via flanges.

An energy absorption device for absorbing at least a portion of impact energy occurring in an impact of an impact body in a safety net construction includes at least one cable guiding unit forming at least one cable receiving region for receiving and / or guiding at least one cable, and further includes at least one energy absorption element, arranged in the cable receiving region and forming at least one friction surface for the guided cable, the energy absorption element being configured, if a force inducing movement of the cable across the friction surface is exerted on the cable, to selectively absorb at least a portion of energy the force created via substantial deformation and / or abrasion of the friction surface. A cable brake, particularly a block-and-tackle cable brake, includes an energy absorption element of the energy absorption device, which is arranged at the deflection element on a side facing toward the cable.

The invention relates to the technical field of semi-arid mining area land reclamation and ecological restoration, and discloses a semi-arid mining area reclamation double-surface-soil key layer and a refined construction method thereof.The semi-arid mining area reclamation double-surface-soil key layer comprises a wind-erosion-resistant key layer and a water and fertilizer maintaining key layer which are arranged from top to bottom; the anti-wind-erosion key layer comprises a coarse particle windproof layer and a fine particle cementing layer which are arranged from top to bottom; the water and fertilizer maintenance key layer is prepared from the following raw materials: fine sand or original sandstorm surface soil, a clay mineral-based physical structure regulator, an organic water-retaining agent and a biological enhancement matrix material; the raw materials of the coarse particle windproof layer comprise gravel and coarse sand; the raw materials of the fine particle cementation layer comprise fine sand or original sandstorm surface soil, a clay mineral-based physical structure regulator and an organic water retention capacity cementing agent. The reclamation double-surface soil key layer for the semi-arid mining area can effectively resist natural erosion, improve the soil structure, improve the water and fertilizer retention capability and promote the recovery of local host plants.

The invention relates to a geomaterial sheet comprising a first organic structural material and a second structural material, different from the first, which are connected to the first structural material to form a planar composite material sheet extending in two mutually perpendicular directions. The invention is characterized in that the first structural material and the second structural material are organic materials, the first structural material exhibits a first biodegradability to a certain extent, and the second structural material exhibits a second biodegradability that differs from the first biodegradability, in particular being lower than the first biodegradability.

The invention relates to the technical field of highway lighting, and particularly discloses a photovoltaic lighting structure for a central isolation strip of an expressway, the photovoltaic lighting structure comprises a plurality of foundation columns fixedly mounted on a highway pavement and a plurality of wave baffles mounted on the foundation columns, and a plurality of light holes are formed in the wave baffles; the lighting mechanism is arranged on the outer side of the outer wall, close to one side of the foundation column, in the wave baffle; the power mechanism is arranged in the middle of the road and can receive airflow flowing power generated when the two-way traffic flow passes through, convert the airflow flowing power and transmit the airflow flowing power to the lighting mechanism. The photovoltaic mechanism is arranged between the power mechanism and the lighting mechanism and used for providing electric energy for the lighting mechanism. The light-transmitting pieces can correspond to the light-transmitting holes in position, light of the lighting mechanism penetrates through the light-transmitting pieces to be projected on the road surface, and a plurality of warning irradiation areas with different distances from the wave baffle are formed. According to the invention, an integrated photovoltaic illumination structure with autonomous energy supply, anti-dazzle and accurate projection warning is realized.

To provide a bamboo-falling prevention structure that can effectively prevent the highly uncertain falling of bamboo by a simple method. [Solution] The system comprises a plurality of support posts 10 set up at intervals, a plurality of barrier ropes 20 laid horizontally at intervals in the vertical direction between the heads of adjacent pairs of support posts 10, buffer devices 25 installed near both ends of the barrier ropes, and cross ropes 30 stretched across the upper and lower parts of adjacent pairs of support posts 10, and the sliding resistance of the plurality of barrier ropes 20 prevents the bamboo from tipping over.

The present invention relates to the technical field of slope rockfall protection, and provides a rockfall pre-sensing active avoiding type steel column supporting system which comprises a rotatable column foot, a deflection steel column, a pulley node, a pre-sensing upper pulling anchor rope and a connecting piece. A bottom lug plate of the deflection steel column is provided with a hole, the fit tolerance of a diameter of the hole and a diameter of a pin shaft is large, so as to help the steel column to rotate in a horizontal direction. The pulley node is provided with double pulleys, a pre-sensing pull-up anchor rope is wound on each of the two pulleys, two anchor points of each rope are distributed on two sides of a projection line (hereinafter referred to as the projection line) of an initial axis of the steel column on a slope surface, one anchor point is near the projection line, and the other anchor point is far away from the projection line. Before falling rocks impact the steel column, the pull-up anchor rope on one side near the projection line is firstly impacted, and the steel column deflects towards the other side under the action of a resultant force of the pull-up anchor rope, so that falling rock impact can be avoided or impact damage of the steel column can be reduced. The protection problem that falling rocks directly impact the steel columns is solved, and the impact resistance reliability and disaster prevention toughness of the passive nets are greatly improved.

The invention belongs to the technical field of side slope protection, and particularly relates to a side slope protection device for highway reconstruction and extension and a method of the side slope protection device. Inclined pressing rods are hinged to the end parts of the supporting seats; a group of criss-cross intercepting rods are fixedly connected between the inclined pressing rods; angle adjusting assemblies are arranged between the supporting bases and the inclined pressing rods. The angle adjusting assembly comprises an adjusting groove; an adjusting block is slidably connected into the adjusting groove. A connecting rod is hinged between the adjusting block and the inclined pressing rod; the supporting base of the slope protection device is fixed to the ground of the side edge of a road, the adjusting block slides to adjust the inclination angle of the inclined pressing rod, the inclined pressing rod is promoted to be attached to the surface of a slope, then the pin is inserted into the pin hole and the connecting hole, the multiple protection devices are sequentially arranged, and the angle of the inclined pressing rod is adaptively adjusted according to different gradients of the slope; the supporting strength of the side slope is improved, the collapse phenomenon of the side slope in the construction process is prevented, and construction operation and traffic safety are improved.

The portable privacy screen includes one or more barrier sections, a plurality of guylines, and a plurality of stakes. The portable privacy screen may be a visual barrier that may be adapted to be erected at an accident scene to provide privacy for an accident victim. An individual barrier section selected from the one or more barrier sections may be collapsed for storage within an emergency vehicle when not in use. The individual barrier section may be secured in place by a plurality of aprons located at the bottom of the individual barrier section, by the plurality of guylines, by the plurality of stakes, or by any combination thereof. The one or more barrier sections may be coupled end-to-end to lengthen the visual barrier.

The invention discloses a novel avalanche blast comprehensive protection system, relates to the field of avalanche protection, solves the problem that the protection effect of avalanche blast is reduced after the height of an existing snow fence is adjusted, and comprises two mounting pipes and a plurality of circular steel pipes mounted between the two mounting pipes at equal intervals. A vertical rod is slidably mounted on the inner side of the mounting pipe, a bottom box is mounted at the bottom end of the vertical rod, a transverse rod is mounted on the outer side of the bottom box, a bottom cylinder is slidably mounted on the outer side of the transverse rod, and an inclined supporting rod is assembled between the mounting pipe and the bottom cylinder in a hinged mode; the adjusting mechanism is used for adjusting the height of the mounting pipe and ensuring stable supporting of the mounting pipe, and the adjusting mechanism is mounted on the inner side of the vertical rod; the height of the round steel pipe is adjusted through the adjusting mechanism, the bottom cylinder pulls the inclined supporting rod to move synchronously, supporting of the inclined supporting rod to the mounting pipe is kept, and therefore the height adjusting convenience and the stable supporting effect of the round steel pipe are improved.

The invention discloses a landslide buffering and energy absorbing device based on a positive and negative Poisson's ratio alternating material, which comprises a protection plate I and a protection plate II which are oppositely arranged, and a positive and negative Poisson's ratio alternating layer is clamped between the protection plate I and the protection plate II; the positive and negative Poisson's ratio alternating layers comprise positive Poisson's ratio honeycomb layers and negative Poisson's ratio honeycomb layers which are alternately arranged in the transverse direction; the elastic modulus of the negative Poisson's ratio honeycomb layer material is not less than that of the positive Poisson's ratio honeycomb layer material; the positive Poisson's ratio honeycomb layer and the negative Poisson's ratio honeycomb layer are connected through a connecting rod layer, and the connecting rod layer is connected with the positive Poisson's ratio honeycomb layer and the negative Poisson's ratio honeycomb layer on the two sides in an attached mode. By reasonably arranging the positive and negative Poisson's ratio alternating layers, the problems of energy absorption and protection of the landslide blocking structure and insufficient rigidity of a single negative Poisson's ratio material are solved, and the blocking structure can be effectively reinforced by applying the positive and negative Poisson's ratio alternating layers to the head-on collision side of the landslide blocking structure.

The invention relates to the technical field of tunnels, and provides a tunnel portal section structure suitable for steep terrains and a construction method thereof.A steep rock-soil body is vertically excavated through an upward slope step by step, a soil nailing wall is adopted to support the upward slope while the upward slope is excavated from top to bottom, a box culvert main body, a stand column assembly and a joist assembly are constructed, and the tunnel portal section structure suitable for the steep terrains is constructed. And constructing portal walls and cover arches on the two sides of the tunnel by using the constructed adjacent span bridge, the box culvert main body and the joist assembly as a construction platform, constructing a pipe shed on the basis of the cover arches, backfilling in the second backfilling space to form a second backfilling layer, constructing a shed tunnel assembly, constructing a tunnel hidden hole, and completing the construction of the tunnel portal section structure. According to the double-layer frame structure, the foundation of an upper shed tunnel assembly can be provided, a channel is provided for an existing low-grade road on the lower portion, the double-layer frame structure is used for an adjacent bridge and a bridge abutment, meanwhile, the upper portion of the box culvert is backfilled to the top face of the joist, a construction platform can be provided for tunnel entering, the lateral soil pressure of a mountain can be resisted, and the construction safety is high.

The invention provides a preparation method of a debris flow protection engineering self-repairing concrete part by using microorganisms and magnesium oxide, which comprises the following steps: S1, dipping a porous aggregate base material with the particle size distribution of 1-5mm in a urease-producing microbial agent, and enabling urease-producing microorganisms in the urease-producing microbial agent to fully enter pores of the porous aggregate base material; s2, urea and magnesium oxide are added into the urease-producing microbial agent impregnated with the porous aggregate base material to obtain a mixed solution, the mixed solution is maintained for 2-5 days, the self-repairing aggregate with the particle size distribution ranging from 2 mm to 10 mm is obtained, urea, urease-producing microorganisms, magnesium oxide and water react with one another in the maintenance period, a hardened shell wrapping the outer surface of the porous aggregate base material is generated, and the self-repairing aggregate with the particle size distribution ranging from 2 mm to 10 mm is obtained. Urea and urease-producing microorganisms are retained in pores of the porous aggregate base material, and the hardened shell comprises brucite, basic magnesium carbonate and magnesium oxide which is not completely reacted; and S3, mixing the self-repairing aggregate with the debris flow protection material, and curing to obtain the debris flow protection engineering self-repairing concrete piece utilizing the microorganisms and the magnesium oxide.

An explosion chamber for an avalanche triggering system including a lower half-chamber closed at its lower end and having an opening at its upper end, and an upper half-chamber closed at its upper end and having an opening at its lower end. The lower end of the upper half-chamber extends around the upper end of the lower half-chamber, or the upper end of the lower half-chamber extends around the lower end of the upper half-chamber, so as to create at least one gas flow channel. The gas flow channel includes a baffle formed by the lower end of the upper half-chamber and the upper end of the lower half-chamber.

The invention belongs to the technical field of water and sand retaining equipment, and particularly discloses a sand and water retaining device and method for water and soil conservation, the sand and water retaining device comprises a support part, a plurality of water collecting parts and a sand fixing belt group, the bottom of the support part is used for being inserted into a soil body, the support part forms a planting cavity on the soil body, and the planting cavity is used for planting plants; the water collecting parts are distributed on the periphery of the support part, each water collecting part comprises a first pipe body, a second pipe body, a water guiding disc, an air guiding piece, a water outlet piece and a water guiding net, the sand fixing belt set is provided with a plurality of liquid dropping openings, and the liquid dropping openings are connected with the water outlet end through water outlet pipes. In the process that air is guided from the earth surface to the underground through the air guiding piece of the water collecting part, water in the air is condensed into water drops, then the water drops enter the water storage cavity to achieve water collection, and the water guiding net is used for collecting rainwater during rainfall or collecting small water drops condensed on the surface due to the day and night temperature difference during no rainfall. And then the water enters the water storage cavity to realize water collection.

Provided is a rockfall protection fence that can efficiently absorb rockfall energy while having a simple structure. 【Solution means】The protection fence 1 of the present invention includes a plurality of columns 10 erected at the upper part of the slope X at intervals, an upper side rope 30 horizontally arranged between the upper parts 10a of the plurality of columns 10, a support pressure rope 40 horizontally arranged between the bases 10b of the plurality of columns 10, and a net 20 suspended from the upper side rope 30 to the lower part of the slope X. The support pressure rope 40 is passed through the slope valley side of the column 10 and the net 20, and both ends of the support pressure rope 40 are fixed to the slope X. Thus, the support pressure rope 40 divides the net 20 into a blocking surface A that unfolds along the plurality of columns 10 and a guiding surface B that unfolds below the plurality of columns 10. The rock mass Y falling from the slope mountain side is impacted by the blocking surface A, and the rock mass Y after being impacted is configured to be guided to the foot of the slope through the space between the guiding surface B and the slope X.

The invention relates to a railway girder and truss integrated bridge shed and a construction method thereof. The railway girder and truss integrated bridge shed comprises low-height prestressed concrete box girders, truss web members, truss upper chords and cast-in-place reinforced concrete plates. The truss upper chord members are positioned on two transverse sides above the low-height prestressed concrete box girder and are longitudinally arranged; the truss web members are arranged on the two transverse sides of the low-height prestressed concrete box girder and are longitudinally inclined, the tops of the truss web members are fixedly connected to the truss upper chord members, and the bottoms of the truss web members are fixedly connected to the low-height prestressed concrete box girder; a cast-in-place reinforced concrete plate is arranged on the top of the truss upper chord, and the bottom of the cast-in-place reinforced concrete plate is poured into the truss upper chord, namely concrete is poured into the truss upper chord. The truss structure and the box girder are effectively connected, so that the truss not only bears the supporting effect of the protective component, but also forms a stress whole with the main girder, the defect that additional load of a traditional shed tunnel acts on the main girder is overcome, and the overall rigidity, stability and durability of the structure are remarkably improved.

The invention discloses an integrated method for realizing sand prevention and stabilization and soil improvement based on coal gangue, which comprises the following specific steps: crushing the coal gangue, grading and screening, taking the coal gangue with the particle size of 0.1-10 mm, and adding bacillus thuringiensis and a compound additive into the coal gangue for activating treatment; the activated coal gangue is mixed with sand grains, then the coal gangue with the grain size being 10-100 mm is laid on the desert earth surface, and integrated treatment is completed; under the combined action of the bacillus thuringiensis and the compound additive, degradation of the coal gangue is accelerated to form a fine particle matrix, and organic matters contained in the coal gangue are synchronously degraded to generate humic acid; meanwhile, metabolites of the bacillus thuringiensis and biological enzymes can promote slow release of nutrient elements such as silicon, potassium and phosphorus in the coal gangue, so that the physical and chemical properties of desert sand grains are improved, and the dual purposes of sand prevention and stabilization and soil improvement are finally achieved by combining the surface laying effect of the coal gangue with the large particle size.

The application relates to a kind of urban bridge middle strip gap self-explaining intersection safety device design systems, including the longitudinal gap self-explaining intersection safety device of setting in the middle strip of elevated bridge upper layer and the indicating guide device of setting in the lower layer of elevated bridge, the longitudinal gap self-explaining intersection safety device includes anti-falling net and self-explaining anti-dazzle device, the anti-falling net and the self-explaining anti-dazzle device are fixedly arranged on the crossbeam of elevated bridge, the indicating guide device is arranged on the road surface under bridge, the self-explaining anti-dazzle device includes louvered shutter, longitudinal rib and transverse beam;The louvered shutter is fixedly arranged on the crossbeam of elevated bridge, the transverse beam is anchored in the side of crossbeam of elevated bridge, and the longitudinal rib is anchored on the transverse beam.The road surface projection point, line, circle of middle strip gap sunlight in the application become intermittent, dispersed, random, reduce the driving interference to road surface driver, and strengthen road surface indicating guide device, meet the psychological expectation of driver, and then realize easy, safe driving.

The utility model relates to the field of geotechnical engineering, in particular to an assembly type rockfall emergency blocking structure which comprises a plurality of prefabricated blocking nets, a plurality of prefabricated micro piles and a plurality of prefabricated blocking columns. The prefabricated micro piles are embedded and inserted into a foundation pit which is deeply excavated in advance; the prefabricated micro pile comprises a first connecting section, and the first connecting section is located on the upper portion of the prefabricated micro pile. The prefabricated blocking column comprises a second connecting section, and the second connecting section is located on the lower portion of the prefabricated blocking column. The first connecting section is connected with the second connecting section, and the first connecting section and the second connecting section are detachable; the prefabricated blocking nets are connected between every two adjacent prefabricated blocking columns, and the prefabricated blocking nets and the prefabricated blocking columns are detachable. The dangerous rock emergency danger reduction barrier is convenient to disassemble and assemble and can be recycled.

The invention relates to a protective barrier for catching a moving object, comprising a net and a supporting structure (6); wherein the supporting structure (6) stretches out and fastens the net (2); and wherein the net (2) has at least a first cable (90) and a second cable (91) with a respective thickness, wherein the net (2) is connected by the first cable (90) and the second cable (91), and the net (2) has at least one connection point (7), wherein the connection point (7) has a thickness, and the thickness of the connection point (7) corresponds at most to twice the thickness of the first cable (90) or to twice the thickness of the second cable (91), wherein the first cable (90) and the second cable (91) contain polyethylene, and the stretched-out net has an energy weight class of 500 kJ / (kg / m2) or more.