CN103437272B - Bamboo bridge - Google Patents
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- CN103437272B CN103437272B CN201310437776.5A CN201310437776A CN103437272B CN 103437272 B CN103437272 B CN 103437272B CN 201310437776 A CN201310437776 A CN 201310437776A CN 103437272 B CN103437272 B CN 103437272B
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Abstract
The invention provides a bamboo bridge. The bamboo bridge comprises bamboo longitudinal beams (1), bamboo horizontal beams (2), a bamboo panel (3), horizontal prestressing tendons (4) and longitudinal prestressing tendons (16) together, and the bridge also comprises illumination equipment and light intensity sensors; a plurality of light intensity sensors are available, and are respectively arranged at different parts of the bridge, namely the front part, the middle part and the rear part; the average value of data measured by the plurality of light intensity sensors serves as the numerical value for controlling the illumination equipment to start. The bridge can start the illumination equipment according to a plurality of measurement numerical values, can guarantee the accuracy of data, and can save energy sources well.
Description
Technical field
The invention belongs to bridge construction technical field, relate in particular to a kind of bamboo bridge with lighting device.
Background technology
Under the overall background of current development low-carbon economy, the new builing structure material of green, ecology, environmental protection, low-carbon (LC) is the inevitable direction of civil engineering development in science and technology.The advantage of bamboo wood maximum is that environmental protection and raw material are renewable, and the phase of becoming a useful person of bamboo wood is generally 2～4 years (timber takes 20 years).According to incompletely statistics, national approximately 3,540,000 hectares of bamboo grove areas (not comprising Taiwan Province), account for 3% of the forest gross area, and approximately 8,000 ten thousand tons of accumulations are produced bamboo wood per year more than approximately 8,000,000 tons.Bamboo kind and the bamboo grove area of China account for 1/4 of the world, and bamboo wood output accounts for first of 1/3, Jun Ju various countries.
Bamboo product is now mainly used in the fields such as carriage bottom plate, container bottom board, furniture, interior decoration, construction formwork and bamboo floor, bamboo wood as the main material of structure in the research of field of civil engineering with application at present in the elementary step, developed as bamboo structure house, bamboo wood pedestrian overcrossing and little across footpath road bridge etc.
Current medium and small common bridge, its superstructure mainly contains two kinds of forms, and a kind of is reinforced concrete structure form, and another kind is steel work or steel-concrete combined structure, no matter adopt which kind of form of structure, every kind of form of structure all has some limitations in application:
(1) for reinforced concrete structure, it is from great, and the construction and maintenance cycle is long.
(2) for steel work or steel-concrete combined structure, its main supporting part is girder steel, and steel cost is higher, and corrosion resistance is poor, and corrosiveness can affect the normal use of bridge, makes maintenance cost higher.
(3) not environmental protection of material therefor, traditional axle building materials used are all steel, cement, itself there is high energy consumption and high pollution in the production of concrete material or steel, or even timber, reinforced concrete cannot be recycled, also cannot be cleared up voluntarily by nature, the wood grows cycle is long, and deforestation bridging is runed counter to environmental protection undoubtedly.Along with sustainable development idea is rooted in the hearts of the people, " green building material " that adopt environmental protection, low energy consumption and can meet instructions for use enjoys popular confidence beyond doubt.
New materials green, energy-saving and environmental protection are the developing direction in civil construction project field.Bamboo offset plate is to make main framework and packing material with mao bamboon material, because bamboo offset plate hardness is high, and anti-folding, resistance to compression, has substituted steel plate in a lot of regions of using.Again because bamboo is easy cultivation, the fast forest that grows into forest, just can cut and draw for three to five years, can replace timber, and therefore, the policy support of national forestry portion is greatly developed and be take the wood-based plate that bamboo is main rapidoprint, the use of having replaced wood type sheet material in a lot of places.
Compare other constructional materials, bamboo wood advantage aspect antidetonation, environmental protection, comfortable, industrialization is remarkable, and the structure that current bamboo wood is made has started to appear at bridge construction field, as Chinese patent " 200610031948.9 " number, disclose a kind of bamboo bridge, full-bridge is comprised of bamboo wood member, simple in structure, easy construction, construction material environmental protection, but for such all bamboo structure bridge, bamboo wood consumption is large, rigidity of section is low, and full-bridge globality is not enough.
Summary of the invention
The object of this invention is to provide a kind of assembling bamboo bridge, this kind bridge construction intensity is large, ductility good, material therefor environmental protection, structural element standardization, assemblingization degree are high, structural integrity is good, can give full play to the advantage of material, meets the demand of the normal use of bridge construction and durability.
Technical scheme of the present invention is: a kind of assembling bamboo bridge, comprises that bamboo longeron, bamboo crossbeam, bamboo panel, transverse prestress bundle and longitudinal prestressing strands form jointly:
Bamboo longeron end face is provided with longeron projection along bridge longitudinal separation, bamboo crossbeam end face is interval with crossbeam projection along bridge lateral, bamboo panel comprises presstressed reinforcing steel and the superimposed a plurality of bridge floor plates of level, the direction of its superimposed arrangement is perpendicular to direct of travel, described presstressed reinforcing steel is FRP muscle, it is through a plurality of described bridge floor plates, and the two ends of presstressed reinforcing steel are through backing plate and use ground tackle fixed strain, fetter a plurality of bridge floor plates;
The bridge deck veneer that described bridge floor plate is made by a plurality of bamboo offset plates successively head and the tail joggle forms, the feather joint place of two adjacent bridge deck sheets is staggered, one end of bridge deck veneer on described bridge floor plate is provided with groove width along entering the tongue-and-groove that groove direction increases gradually, adjacent bridge deck veneer one end is provided with the tenon matching with described tongue-and-groove with it, and described tenon embeds in tongue-and-groove;
The below of bamboo panel is provided with respectively the bridge deck groove matching with longeron projection and crossbeam projection, and the corner angle of bamboo panel rear and front end tighten the corner protector steel limit that spiral-lock has integral reinforcing;
Bamboo crossbeam is connected by metal connecting piece with bamboo longeron, in bridge deck groove, is provided with metalwork;
Transverse prestress bundle is FRP muscle, and it passes in bamboo crossbeam inside, and its two ends stretch-draw prestressing force is also anchored in the lateral surface of bridge lateral outermost bamboo longeron;
In bamboo longeron, be equipped with 4-6 root longitudinal prestressing strands, this longitudinal prestressing strands is FRP muscle, and its two ends stretch-draw prestressing force is also anchored in the lateral surface of the longitudinal outermost bamboo of bridge crossbeam;
The bottom of bamboo longeron, bamboo crossbeam, bamboo panel is provided with FRP cloth;
This assembling bamboo bridge whole bamboo woods used were all immersed in the impregnation pond that fills polyurethane resin and phenolic resins before assembling, and the volume ratio of polyurethane resin and phenolic resins is 2-2.5:1, and boils 10-15 minute at 100-110 ℃; Afterwards bamboo wood picked up and dry, then on the external surface of whole bamboo woods, evenly applying successively one deck waterborne polyurethane resin, one deck polyurethane resin, one deck waterborne polyurethane resin and one deck resorcinol formaldehyde resin.
Preferably, described metalwork is that metal ribs or metal tube are made, and described projection and groove are that inverted trapezoidal or groove are that groove width increases gradually along entering groove direction, and described projection has the respective shapes coordinating with it.
In above-mentioned arbitrary scheme, preferably, several specific admixtures a kind of or wherein that described FRP muscle or the fiber reinforced material of FRP cloth can be in carbon fiber, glass fiber, basalt fibre, aramid fiber form.
In above-mentioned arbitrary scheme, preferably, metal connecting piece is comprised of U-shaped support and fixed head, and the sidewall of U-shaped support and fixed head offer bolt cavity.
In above-mentioned arbitrary scheme, preferably, the bed thickness of the waterborne polyurethane resin of coating, polyurethane resin, waterborne polyurethane resin and resorcinol formaldehyde resin is respectively 0.5mm, 0.8mm, 0.5mm and 0.5mm.
In above-mentioned arbitrary scheme preferably, described corner protector steel limit is angle steel, quantity is 2, and described angle steel is equal leg angle, its length is not more than the width of bamboo panel, the hem width < D of equal leg angle described in D/2 <, the thickness that wherein D is described bamboo panel.
In above-mentioned arbitrary scheme, preferably, the place of interconnecting of bamboo longeron, bamboo crossbeam and bamboo panel can further adopt structure glue to strengthen being connected.
In above-mentioned arbitrary scheme, preferably, described bamboo bridge further comprises a plurality of lighting apparatus, brightness sensor and central controller, and described a plurality of lighting apparatus, brightness sensor are connected with central controller communication; Described a plurality of lighting apparatus is divided into four groups, and the brightness number that a plurality of lighting apparatus detect according to brightness sensor starts, and the concrete order starting is as follows: when brightness number reaches the first brightness, and first group of illuminating device starting illumination; When brightness number reaches secretly the second brightness in the first brightness, second group of illuminating device starting illumination, now first group and second group of lighting apparatus throw light on simultaneously; When brightness number reaches secretly the 3rd brightness in the second brightness, the 3rd group of illuminating device starting illumination, now first group, second group and the 3rd group of lighting apparatus throw light on simultaneously; When brightness number reaches secretly the 4th brightness in the 3rd brightness, the 4th group of illuminating device starting illumination, now first group, second group, the 3rd group and the 4th group of lighting apparatus throw light on simultaneously.
Described brightness sensor can arrange a plurality of, is separately positioned on the diverse location of bridge, and the average of the data by a plurality of brightness sensor measurements is used as controlling the numerical value of illuminating device starting.
Advantage of the present invention is remarkable, has following beneficial effect:
(1) bamboo panel tensile strength of the present invention is very high, compares concrete slab, and under normal operating condition, deck structrue does not exist the possibility of cracking.
(2) the formation veneer of bamboo panel is for laterally edge-on, and spreading mode changes longitudinal spliced for horizontally-spliced, in bridge floor wide region inseam quantity, can obviously reduce; Horizontally-spliced employing tapered end joint head replaces traditional finger form, and (finger-jointed plate refers to that polylith wood board splicing forms, no longer glue and press clamping plate up and down, between vertical plank, adopt zigzag interface, similar two hand fingers intersection docking), different from the main tension of finger joint, joggle joint can tension, also can bending resistance, shearing resistance, thus farthest reduce the weakening of seam to bridge floor plate supporting capacity.
(3) by the horizontal and vertical prestressing tendon of stretch-draw, can improve the horizontal and vertical rigidity of bridge construction, strengthened the resistance to overturning between bamboo longeron and bamboo crossbeam simultaneously.
(4) projection and groove being set makes to form mechanical snap between bamboo wood member, primary be rigidly connected providing, the metalwork simultaneously arranging in groove provides auxiliary the flexibly connecting of bonding surface, and the connection of coupling hardness with softness has guaranteed rigidity and the ductility that structure is enough.
(5) half assembled bamboos-Combined concrete bridge is from heavy and light, and member is easy to standardization, and most of member can be prefabricated in advance in factory, and speed of application is fast, the cycle is short.
(6) bamboo wood is as one of the important fast-growing of China, renewable forest reserves, has growth fast, becomes a useful person early, and output is high, the feature that once afforestation can sustainable utilization, and energy consumption is low, pollution-free in process of production, is a kind of desirable Green environmental-protection building material; Mechanical property is in no way inferior in timber, and its speed of growth is also faster than timber, compares with steel with concrete, and in process, energy consumption is low, and discarded object is few, is undisputed " green building material ".
(7) anti-mould and anti-moth of bamboo wood own, good looking appearance, have good durability and corrosion resistance, and this makes bridge inspection and maintenance expense lower.
(8) make full use of the tensile strength that FRP is higher, and improve largely the failure mode of the discrete and fragility of former bamboo member mechanical property, reduce the reduction of its local defect to mechanical property; Bamboo wood is as the main body of compound beam, it has the higher ratio of strength to weight, good elasticity and toughness and processing characteristics, and in tensile region, obtain the further enhancing of FRP, this structure makes full use of the feature of material, the advantage such as has from heavy and light, bearing capacity is large, rigidity is large, anti-twisting property is strong, ductility is good, automatic recovery ability is strong.
(9) utilize durability and the pliability of polyurethane resin, phenolic resins, soaking in the proper ratio bamboo wood and boiling to increase bamboo wood toughness insect protected, experimental results show that this proper proportion has significantly improved the toughness of bamboo wood; On the external surface of whole bamboo woods, applying waterborne polyurethane resin, polyurethane resin, waterborne polyurethane resin and resorcinol formaldehyde resin is afterwards the performance of utilizing its good wear-resisting weather-proof, in the present invention, the thickness of each layer has guaranteed that its wear-resisting weather-proof performance reaches best, makes the use safety of its application life of in use having improved bamboo wood and bridge.
The coefficient of thermal expansion of (10) four layers of coating is outwards diminished successively by the external surface of bamboo wood, can guarantee compactness and the stability of each layer of connection, prevents that skin from coming off.
(11) by the startup of self-control lighting equipment, can energy conservation.
(12) by the different setting of power of each group lighting apparatus, can energy conservation.
(13) brightness of measuring light by a plurality of brightness sensors are set, can guarantee the accuracy of the data measured.
Accompanying drawing explanation
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.
Fig. 1 is a kind of overall structure schematic diagram of assembling bamboo bridge;
Fig. 2 is the bamboo panel structural representation of assembling bamboo bridge;
Fig. 3 is the bridge deck veneer elevation of assembling bamboo bridge bamboo panel;
Fig. 4 is vertical (horizontal stroke) beam of the bamboo of assembling bamboo bridge and the organigram that is connected of bamboo panel;
Fig. 5 is vertical (horizontal stroke) girder construction schematic diagram of the bamboo of assembling bamboo bridge.
Fig. 6 is the flow chart that lighting apparatus is controlled.
In the accompanying drawings, bamboo longeron-1, bamboo crossbeam-2, bamboo panel-3, transverse prestress bundle-4, longeron projection-5, crossbeam projection-6, presstressed reinforcing steel-7, bridge floor plate-8, backing plate-9, ground tackle-10, bridge deck veneer-11, bridge deck groove-12, corner protector steel limit-13, metal connecting piece-14, metalwork-15, longitudinal prestressing strands-16, tongue-and-groove-17, tenon-18.
The specific embodiment
For technical characterictic of the present invention, object and effect being had more clearly, understand, now contrast accompanying drawing explanation the specific embodiment of the present invention.
As shown in Fig. 1～Fig. 5, a kind of assembling bamboo bridge, comprises that bamboo longeron 1, bamboo crossbeam 2, bamboo panel 3, transverse prestress bundle 4 and longitudinal prestressing strands 16 form jointly.
Bamboo longeron 1 end face is provided with longeron projection 5 along bridge longitudinal separation, bamboo crossbeam 2 end faces are interval with crossbeam projection 6 along bridge lateral, bamboo panel 3 comprises presstressed reinforcing steel 7 and the superimposed a plurality of bridge floor plates 8 of level, the direction of its superimposed arrangement is perpendicular to direct of travel, described presstressed reinforcing steel 7 is FRP muscle, it is through a plurality of described bridge floor plates 8, and the two ends of presstressed reinforcing steel 7, through backing plate 9 and with ground tackle 10 fixed strains, fetter a plurality of bridge floor plates 8.
The bridge deck veneer 11 that described bridge floor plate 8 is made by a plurality of bamboo offset plates successively head and the tail joggle forms, the feather joint place of two adjacent bridge deck sheets 8 is staggered, one end of bridge deck veneer 11 on described bridge floor plate 8 is provided with groove width along entering the tongue-and-groove 17 that groove direction increases gradually, adjacent bridge deck veneer 11 one end are provided with the tenon 18 matching with described tongue-and-groove 17 with it, and described tenon 18 embeds in tongue-and-groove 17.
The below of bamboo panel 3 is provided with respectively the bridge deck groove 12 matching with longeron projection 5 and crossbeam projection 6, and described projection and groove are that inverted trapezoidal or groove are that groove width increases gradually along entering groove direction, and described projection has the respective shapes coordinating with it; The corner angle of bamboo panel 3 rear and front ends tighten the corner protector steel limit 13 that spiral-lock has integral reinforcing.
Bamboo crossbeam 2 is connected by metal connecting piece 14 with bamboo longeron 1, and metal connecting piece 14 is comprised of U-shaped support and fixed head, and the sidewall of U-shaped support and fixed head offer bolt cavity.In bridge deck groove 12, be provided with metalwork 15, it is made for metal ribs or metal tube.
Transverse prestress bundle 4 is FRP muscle, and it passes in bamboo crossbeam 2 inside, and its two ends stretch-draw prestressing force is also anchored in the lateral surface of bridge lateral outermost bamboo longeron 1.
In bamboo longeron 1, be equipped with 4-6 root longitudinal prestressing strands 16, this longitudinal prestressing strands 16 is FRP muscle, and its two ends stretch-draw prestressing force is also anchored in the lateral surface of the longitudinal outermost bamboo of bridge crossbeam (2).
The bottom of bamboo longeron 1, bamboo crossbeam 2, bamboo panel 3 is provided with FRP cloth;
Several specific admixtures a kind of or wherein that described FRP muscle or the fiber reinforced material of FRP cloth can be in carbon fiber, glass fiber, basalt fibre, aramid fiber form.
This assembling bamboo bridge whole bamboo woods used were all immersed in the impregnation pond that fills polyurethane resin and phenolic resins before assembling, and the volume ratio of polyurethane resin and phenolic resins is 2-2.5:1, and boils 10-15 minute at 100-110 ℃; Afterwards bamboo wood picked up and dry, then on the external surface of whole bamboo woods, evenly applying successively the waterborne polyurethane resin that one deck 0.5mm is thick, thick waterborne polyurethane resin and the thick resorcinol formaldehyde resin of one deck 0.5mm of polyurethane resin, one deck 0.8mm that one deck 0.8mm is thick.
The coefficient of thermal expansion of four layers of coating is outwards diminished successively by the external surface of bamboo wood, can guarantee compactness and the stability of each layer of connection, prevents that skin from coming off.Because in the process of being heated, outermost layer is first heated, temperature increase is maximum, first expand, then be the inside second layer, the 3rd layer, the 4th layer expanded by heating successively, therefore temperature increase reduces gradually, and four layers of expansion number of times reduce successively and can guarantee that expansion rate is consistent substantially, guarantee compactness and the stability of each layer of connection.In like manner, when catch a cold winter, also can guarantee compactness and the stability of each layer of connection.
For the material of coating, be not limited to the material of foregoing description, those skilled in the art can reasonably select, but for the selection of the material of four-layer structure, and requirement is that the coefficient of thermal expansion by the outside four-layer structure of the external surface of bamboo wood reduces gradually.
Certainly, the number of plies is not limited to four layers, can comprise 5 layers or more, also can comprise three layers, and for example the thickness of three layers is waterborne polyurethane resin, polyurethane resin and resorcinol formaldehyde resin.Size is also not limited to above-mentioned size, and above-mentioned size is also best embodiment.
Described corner protector steel limit 13 is angle steel, and quantity is 2, and described angle steel is equal leg angle, and its length is not more than the width of bamboo panel 3, the hem width < D of equal leg angle described in D/2 <, and wherein D is the thickness of described bamboo panel 3.
The place of interconnecting of bamboo longeron 1, bamboo crossbeam 2 and bamboo panel 3 can further adopt structure glue to strengthen being connected.
To pulling off experiment with the bamboo wood that polyurethane resin and the phenolic resins of proper proportion soaks and boils in the present invention, experimental result shows that this measure has significantly improved the toughness of bamboo wood, referring to table 1.
Table 1
| Material processed | Toughness (anti-folding and durability) (representing with T) |
| Undressed original bamboo wood | T |
| The bamboo wood only soaking with polyurethane resin | （1+30%）T |
| The bamboo wood only soaking with phenolic resins | （1+35%）T |
| The polyurethane resin that bamboo wood is 2-2.5:1 by volume ratio and phenolic resins soak, and boil 15-20 minute at 100-110 ℃ | （1+60%~70%）T |
Described bamboo bridge further comprises a plurality of lighting apparatus, brightness sensor and central controller (not illustrating in accompanying drawing), and described a plurality of lighting apparatus, brightness sensor are connected with central controller communication; Described a plurality of lighting apparatus is divided into four groups, and the ambient brightness numerical value that a plurality of lighting apparatus detect according to brightness sensor starts, and the concrete order starting is as follows:
When brightness number reaches the first brightness, first group of illuminating device starting illumination; When brightness number reaches secretly the second brightness in the first brightness, second group of illuminating device starting illumination, now first group and second group of lighting apparatus throw light on simultaneously; When brightness number reaches secretly the 3rd brightness in the second brightness, the 3rd group of illuminating device starting illumination, now first group, second group and the 3rd group of lighting apparatus throw light on simultaneously; When brightness number reaches secretly the 4th brightness in the 3rd brightness, the 4th group of illuminating device starting illumination, now first group, second group, the 3rd group and the 4th group of lighting apparatus throw light on simultaneously.
By the startup in proper order of lighting apparatus, can guarantee to start according to different brightness the lighting apparatus of varying number, can energy conservation, reduce unnecessary power wastage.
What further optimize is, lighting apparatus model is identical, wherein the quantity of first group of lighting apparatus is less than the quantity of second group of lighting apparatus, and the quantity of second group of lighting apparatus is less than the quantity of the 3rd group of lighting apparatus, and the quantity of the 3rd group of lighting apparatus is less than the quantity of the 4th group of lighting apparatus.
What further optimize is, the general power number of first group of lighting apparatus is less than the general power number of second group of lighting apparatus, the general power number of second group of lighting apparatus is less than the general power number of the 3rd group of lighting apparatus, and the general power number of the 3rd group of lighting apparatus is less than the general power number of the 4th group of lighting apparatus.
Described brightness sensor can arrange a plurality of, and the average of the data by a plurality of brightness sensor measurements is used as controlling the numerical value of illuminating device starting, when average is during lower than certain brightness number, and illuminating device starting illumination.By a plurality of brightness sensors are set, can guarantee the accuracy of survey data.
By the setting of above-mentioned power, can start less lighting apparatus so that in the situation that light is stronger, then dimmed along with light, accelerates gradually, and the quantity increasing also constantly increases, and guarantees the saving of electric power.
When ambient brightness brightens gradually, for example, when it is soon bright, now central controller controls lighting apparatus progressively cuts out according to above-mentioned contrary order.When brightness is between the 4th brightness and the 3rd brightness, now the 4th group of lighting apparatus cuts out, and its excess-three group continues to start illumination; When brightness is between the 3rd brightness and the second brightness, now the 3rd group of lighting apparatus cuts out, and only has first, second group lighting apparatus to continue to start illumination; When brightness is between the second brightness and the first brightness, now second group of lighting apparatus cuts out, and only has first group of lighting apparatus to continue to start illumination; When brightness surpasses the first brightness, first group of lighting apparatus cuts out, and now all lighting apparatus all cut out.
The power source of lighting apparatus can derive from solar energy.Solar cell is placed on to the surface of bamboo bridge, the groove of placing solar cell can be set on bamboo bridge surface, transparent anti-abrasion cover is set on solar cell, guarantor steps on like this, can not damage battery simultaneously.Solar cell utilizes the electrical power storage of solar energy conversion in a large battery, and battery is powered to lighting apparatus according to brightness number.
By solar cell, be arranged on the surface of bamboo bridge, can reduce the laying of circuit, save space, guarantee the attractive in appearance of bamboo bridge surrounding enviroment simultaneously.
Certainly, solar cell also can be arranged on a certain distance from bamboo bridge position, for example building top nearby.
Except solar cell for supplying power, this bamboo bridge can arrange AC-powered simultaneously, with the deficiency of quasi-complement solar electric power.
Bamboo bridge is provided with the electric quantity detection apparatus of solar storage battery, to detect the current electric quantity of battery, and when the current electric quantity deficiency of battery, starts alternating current and powers.
The mode of determining electric weight deficiency has following two kinds, but is not limited to following two kinds.
1) mode detecting can be determined the time of power supply according to the power number of lighting apparatus by dump energy, when the time arrives, just automatically start AC-powered.
Certainly, for guarantee the time accurately, when needing lighting apparatus start at every turn or close, carry out an electric weight and detect, for example in the time of first group of device start, need to carry out one-time detection, when second group of device start or when closing, carry out one-time detection.Because start at every turn or close after the power number of lighting apparatus can change, when therefore needing lighting apparatus start at every turn or close, carry out an electric weight and detect.
2) according to the ambient brightness of measuring, determine whether to start AC-powered.For example, after four groups of lighting apparatus all start, brightness still, lower than the 4th brightness, now can be inferred electricity shortage, so control system is controlled the startup of alternating current at once.
The control of lighting apparatus can be carried out Long-distance Control, same, and the measurement of ambient brightness can be measured in a distance of range blanking equipment, avoids the illumination of lighting apparatus to affect measurement result.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (1)
1. a bamboo bridge, comprises that bamboo longeron (1), bamboo crossbeam (2), bamboo panel (3), transverse prestress bundle (4) and longitudinal prestressing strands (16) form jointly, is characterized in that:
Bamboo longeron (1) end face is provided with longeron projection (5) along bridge longitudinal separation, bamboo crossbeam (2) end face is interval with crossbeam projection (6) along bridge lateral, bamboo panel (3) comprises presstressed reinforcing steel (7) and the superimposed a plurality of bridge floor plates (8) of level, the direction of its superimposed arrangement is perpendicular to direct of travel, described presstressed reinforcing steel (7) is FRP muscle, it is through a plurality of described bridge floor plates (8), the two ends of presstressed reinforcing steel (7), through backing plate (9) and with ground tackle (10) fixed strain, fetter a plurality of bridge floor plates (8);
The bridge deck veneer (11) that described bridge floor plate (8) is made by a plurality of bamboo offset plates successively head and the tail joggle forms, the feather joint place of two adjacent bridge deck sheets (8) is staggered, one end of bridge deck veneer (11) on described bridge floor plate (8) is provided with groove width along entering the tongue-and-groove (17) that groove direction increases gradually, adjacent bridge deck veneer (11) one end is provided with the tenon (18) matching with described tongue-and-groove (17) with it, and described tenon (18) embeds in tongue-and-groove (17);
The below of bamboo panel (3) is provided with respectively the bridge deck groove (12) matching with longeron projection (5) and crossbeam protruding (6), and the corner angle of bamboo panel (3) rear and front end tighten the corner protector steel limit (13) that spiral-lock has integral reinforcing;
Bamboo crossbeam (2) is connected by metal connecting piece (14) with bamboo longeron (1), is provided with metalwork (15) in bridge deck groove (12);
Transverse prestress bundle (4) is FRP muscle, and it passes in bamboo crossbeam (2) inside, and its two ends stretch-draw prestressing force is also anchored in the lateral surface of bridge lateral outermost bamboo longeron (1);
In bamboo longeron (1), be equipped with 4-6 root longitudinal prestressing strands (16), this longitudinal prestressing strands (16) is FRP muscle, and its two ends stretch-draw prestressing force is also anchored in the lateral surface of the longitudinal outermost bamboo of bridge crossbeam (2);
The bottom of bamboo longeron (1), bamboo crossbeam (2), bamboo panel (3) is provided with FRP cloth;
This bamboo bridge whole bamboo woods used were all immersed in the impregnation pond that fills polyurethane resin and phenolic resins before assembling, and the volume ratio of polyurethane resin and phenolic resins is 2-2.5:1, and boils 10-15 minute at 100-110 ℃; Afterwards bamboo wood picked up and dry, then on the external surface of whole bamboo woods, evenly applying successively one deck waterborne polyurethane resin, one deck polyurethane resin, one deck waterborne polyurethane resin and one deck resorcinol formaldehyde resin;
Described bamboo bridge further comprises a plurality of lighting apparatus, brightness sensor and central controller, and described a plurality of lighting apparatus, brightness sensor are connected with central controller communication; Described brightness sensor is a plurality of, is separately positioned on the diverse location of bridge, according to the average of the data of a plurality of brightness sensor measurements, controls illuminating device starting, when average is during lower than certain brightness number, and illuminating device starting illumination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310437776.5A CN103437272B (en) | 2013-09-24 | 2013-09-24 | Bamboo bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310437776.5A CN103437272B (en) | 2013-09-24 | 2013-09-24 | Bamboo bridge |
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| CN103437272A CN103437272A (en) | 2013-12-11 |
| CN103437272B true CN103437272B (en) | 2014-09-03 |
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| CN201310437776.5A Expired - Fee Related CN103437272B (en) | 2013-09-24 | 2013-09-24 | Bamboo bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109610290B (en) * | 2019-01-24 | 2021-03-19 | 河海大学 | Landscape trestle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB594942A (en) * | 1941-07-14 | 1947-11-24 | Derek William Ross Walker | Improvements in and relating to raft-like structures for use on water and to bridge-constructions employing the same |
| CN103437271A (en) * | 2013-09-11 | 2013-12-11 | 赵炜 | Assembly type bamboo bridge |
| CN103452035A (en) * | 2013-09-11 | 2013-12-18 | 赵炜 | Assembly type bamboo bridge with variable expansion coefficients |
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2013
- 2013-09-24 CN CN201310437776.5A patent/CN103437272B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB594942A (en) * | 1941-07-14 | 1947-11-24 | Derek William Ross Walker | Improvements in and relating to raft-like structures for use on water and to bridge-constructions employing the same |
| CN103437271A (en) * | 2013-09-11 | 2013-12-11 | 赵炜 | Assembly type bamboo bridge |
| CN103452035A (en) * | 2013-09-11 | 2013-12-18 | 赵炜 | Assembly type bamboo bridge with variable expansion coefficients |
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