CN103410090B - A kind of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge and construction method thereof - Google Patents

A kind of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge and construction method thereof Download PDF

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Publication number
CN103410090B
CN103410090B CN201310184699.7A CN201310184699A CN103410090B CN 103410090 B CN103410090 B CN 103410090B CN 201310184699 A CN201310184699 A CN 201310184699A CN 103410090 B CN103410090 B CN 103410090B
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concrete
rod
suspension rod
anchor
arch rib
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CN201310184699.7A
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Chinese (zh)
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CN103410090A (en
Inventor
陆树荣
张启标
刘厚平
江越胜
宋恭俭
熊峰伟
周晖
王勇
周文义
李玲芳
李炜
盛瑜晖
吴俭
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湖州交通规划设计院
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Abstract

The present invention relates to a kind of suspension rod anchoring structure and construction method thereof of active enforcement concrete bowstring arch bridge.This arch bridge structure comprises: the concrete suspension rod that concrete tie-rod, concrete arch rib are vertically connected with several, two ends and the concrete tie-rod of arc concrete arch rib are connected as a single entity, concrete arch rib between adjacent concrete suspension rod is provided with anchor structure, concrete tie-rod is provided with the structure that casts anchor, at upper anchor structure with cast anchor to be connected with between structure and have prestressed flexible cable suspension rod.Beneficial effect is: 1) flexible cable suspension rod provides compressive stress deposit for concrete suspension rod, eliminates crack disease, improves arch rib, the distribution of tie-rod internal force, increases the rigidity of structure, improve load carrying capacity of bridge and durability; Set up the constraint of multiple elastic support in addition, increase the old bridge rigidity of structure, improve the comfortableness of driving and pedestrian bridge.2) this active enforcement method construct succinct, construct convenient, cost economic, textural overall appearance not affecting bridge; 3) dismounting of flexible cable hanging rod structure and replacing are simply, conveniently.

Description

A kind of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge and construction method thereof
Technical field
The present invention relates to a kind of bridge construction reinforcement means, especially relate to a kind of active enforcement method, effectively can improve supporting capacity and the durability of bridge.
Background technology
Concrete bowstring arch bridge has the larger span ability of arch bridge and simply supported girder bridge concurrently to the large feature of the adaptive capacity two that soft foundation is stronger, girder building height is generally lower than other concrete bridge type, be the preferred bridge type that road crosses over navigation channel, obtain at the Jiangsu and Zhejiang Provinces one of high-grade cruiseway prosperity band and apply comparatively widely.The concrete bowstring arch bridge of Earlier designs, suspension rod many employings concrete stiffening member, inside establishes fining twisted steel as prestressed reinforcement.But, in recent years this type of bridge due to old bridge design load grade on the low side, the combined influence of the factors such as current traffick constantly increases, current load-carrying improves constantly, there is many cracks in the suspension rod of some bridge, inner prestressing force fining twisted steel suffers erosion, arch rib, tie-rod safety stock reduce, and bridge durability is affected, and even there is the hidden danger of bridge collapse.Therefore, in order at utmost utilize existing resource, ensureing bridge construction operation security, extending its application life, to reach corresponding Social benefit and economic benefit, the important process project that maintenance and reinforcement has become bridge design, research and administrative department is carried out to the old concrete bowstring arch bridge structure of danger.
As publication number is: a kind of reinforced concrete arch bridge construction method that the Chinese invention patent of CN102493360A provides, comprise the steps: step one: pile foundation, cushion cap, abutment abutment body side wall and bridge pier pier construction; Step 2: set up hole, arch bridge both sides the 4 to 8 and the 13 to 17 each four hole arch ring supports, and latch system is set, finally build 8 hole arch ring concrete in this step; Step 3: remove the arch ring support set up in step 2, set up each four hole arch ring supports in hole, abutment side the 0 to 4 and the 17 to 21 hole, and latch system is set, finally build 8 hole arch ring concrete in this step; Step 4: remove the arch ring support set up in step 3, set up remaining 8 to 13 hole of span centre totally five hole arch ring supports, and arrange latch system, build 5 hole arch ring concrete in this step, full-bridge closes up.Establish finish rolling deformed bar as prestressed reinforcement in the concrete rigid hanger of this concrete bowstring arch bridge, bearing load is on the low side, and under the impact of various unfavorable factor, concrete rigid hanger easily occurs crack, inner prestress fine rolled twisted bar suffers erosion, and has a strong impact on operation security and the application life of bridge.
Summary of the invention
The present invention is mainly for the Common Diseases existing for existing concrete bowstring arch bridge: concrete suspension rod occurs hoop crack under live loading, inner prestressing force fining twisted steel suffers erosion, arch rib, tie-rod safety stock reduce, and affect operation security and the application life of bridge; A kind of active enforcement method is provided, increases concrete suspension rod compressive stress deposit, eliminate suspension rod crack disease, improve arch rib, the distribution of tie-rod internal force, effectively can improve supporting capacity and the durability of bridge.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge, concrete bowstring arch bridge structure comprises: concrete tie-rod, concrete arch rib, several equally distributed concrete suspension rods are provided with between concrete tie-rod and concrete arch rib, described concrete arch rib is curved, two ends and the concrete tie-rod of concrete arch rib are connected as a single entity, concrete suspension rod is vertically connected between concrete arch rib and concrete tie-rod, concrete arch rib between adjacent concrete suspension rod is provided with anchor structure, concrete tie-rod between adjacent concrete suspension rod is provided with the structure that casts anchor, at upper anchor structure with cast anchor to be connected with between structure there is prestressed flexible cable suspension rod.Crack common fault is there is according to existing highway bridge concrete suspension rod, affect the problem of structural safety and durability, this active enforcement method is according to the mechanical mechanism of concrete bowstring arch bridge, at former rigidity concrete suspension rod internode, increase flexible cable suspension rod, newly-increased suspension rod upper end constructs with the upper anchor on concrete arch rib and is connected, and lower end constructs with casting anchor on concrete tie-rod and is connected; By to newly-increased suspension rod Shi Hanzhang, add concrete suspension rod compressive stress deposit on the one hand, eliminate its crack disease, improve concrete arch rib, the distribution of concrete tie-rod internal force, improve load carrying capacity of bridge and durability; On the other hand multiple elastic support constraint is set up to the bowstring arch bridge space structures of internally indeterminate construction, increased the old bridge rigidity of structure, improve the comfortableness of driving and pedestrian bridge.This reinforcement means structure is succinct, construct convenient, cost economic, the textural overall appearance not affecting bridge.In addition, flexible cable suspension rod, upper anchor structure and the structure that casts anchor are absolute construction, and in later stage operation process, newly-increased suspension rod can change adjustment boom internal force as required in time, and dismounting is simple and convenient.
Above-mentioned technical problem of the present invention is solved by following technical proposals simultaneously: a kind of construction method of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge, comprises following working procedure:
Operation one, at adjacent concrete suspension rod internode span centre concrete arch rib upper limb, by the selected upper anchor point reinforcing each flexible cable suspension rod of arch bridge of design, measure the radian size of this concrete arch rib upper limb, " U " shaped steel cover is made according to this size, and preservative treatment is done to " U " shaped steel cover, from concrete arch rib upper limb, " U " shaped steel cover is installed, by anchor bolt, " U " shaped steel is overlapped auxiliary positioning on concrete arch rib, adopt steel bonding glue by " U " shaped steel cover and the anchoring of concrete arch rib simultaneously, two blocks of latch steel plates are provided with below concrete arch rib, latch steel plate and " U " shaped steel overlap and adopt piercing welding to fix,
Operation two, on concrete tie-rod, the lower anchor point of selected flexible cable suspension rod, lower edge shape according to lower anchor point concrete tie-rod makes hanging stirrup, and preservative treatment is done to hanging stirrup, the side of hanging stirrup is the casing of hollow, internal fixtion has anchor plate, installs hanging stirrup, adopt pressure to inject steel bonding glue fix at concrete tie-rod and hanging stirrup junction from concrete tie-rod lower edge;
Operation three, measure the distance of each flexible cable suspension rod upper and lower anchor point anchor end one by one, customize each anchor point flexible cable suspension rod finished product rope by measured size in finished product rope producer; On-the-spot one_to_one corresponding installs flexible cable suspension rod, is stretched between two blocks of latch steel plates by its upper end otic placode, by pin, it is connected anchoring with latch steel plate; By the lower end of flexible cable suspension rod through cast anchor structure anchor plate via hole and be anchored on anchor plate by ground tackle;
Operation four, according to designing the order of specifying and stretching force, one by one to flexible cable suspension rod Shi Hanzhang, the position of adjustment ground tackle, makes ground tackle abut against on anchor plate, in the process of Shi Hanzhang, the stress and displacement of complete monitoring concrete arch rib, concrete suspension rod and concrete tie-rod is answered to change;
Operation five, on upper and lower anchor point expose steel beam column scene mend anticorrosive coating.
The active enforcement method of concrete bowstring arch bridge, flexible cable suspension rod is set up and Shi Hanzhang at concrete rigid hanger internode span centre, add former concrete suspension rod compressive stress deposit on the one hand, eliminate the crack disease of concrete suspension rod, improve concrete arch rib, the distribution of concrete tie-rod internal force, improve load carrying capacity of bridge and durability; On the other hand multiple elastic support constraint is set up to the bowstring arch bridge space structures of internally indeterminate construction, increased the old bridge rigidity of structure, improve the comfortableness of driving and pedestrian bridge.What the anchor end wherein occurred in operation three referred to is the lower end of upper anchor structure and the upper end of the structure that casts anchor.
As preferably, the flexible cable suspension rod between described adjacent concrete suspension rod has two bundles, and two bundle flexible cable suspension rods are separately positioned on the both sides of concrete tie-rod.The flexible cable suspension rod that adjacent concrete suspension rod internode is set up, every suspension centre has two bundles, and two bundle flexible cable suspension rods are arranged on the both sides of concrete tie-rod, and its upper end adopts otic placode to be connected with the latch steel plate that upper anchor constructs and is anchored in arch rib lower edge; Its lower end adopts ground tackle to be anchored in the side of tie-rod through the structure anchor plate that casts anchor.Prestressing force is passed to tie-rod and arch rib by the upper and lower anchoring structure of particular design by newly-increased suspension rod upper and lower side, and non-immediate is anchored on concrete tie-rod and arch rib component, makes strengthening construction to original structure almost not damaged.
As preferably, described upper anchor structure comprises " U " shaped steel cover straddled on concrete arch rib, " U " shaped steel cover is adaptive also by anchor bolt auxiliary positioning with concrete arch rib, anchoring steel bonding glue-line is provided with between " U " shaped steel cover and concrete arch rib, be provided with two pieces below concrete arch rib and overlap the fixing latch steel plate of piercing welding with " U " shaped steel, the upper end of described flexible cable suspension rod is connected with otic placode, and otic placode stretches between two blocks of latch steel plates, is connected with it by pin.Otic placode forms articulated structure, technology maturation by pin and latch steel plate, and stable connection is reliable.Wherein piercing welding is fixed as and puts perforate at " U " shaped steel, latch steel plate arranges corresponding projection, projection is connected together in hole, then be welded and fixed.
As preferably, the described structure that casts anchor comprises and hangs the hanging stirrup of pocket at concrete tie-rod lower edge, hanging stirrup and concrete tie-rod adaptation, anchoring steel bonding glue-line is provided with between hanging stirrup and concrete tie-rod, the side of hanging stirrup is the casing of hollow, and casing internal fixtion has anchor plate, and anchor plate is provided with the via hole be convenient to flexible cable suspension rod and passed, the lower end of flexible cable suspension rod is passed anchor plate and adopts ground tackle to be anchored on anchor plate, and ground tackle external diameter is greater than the aperture of via hole.Hanging stirrup is bottom-up catches concrete tie-rod, and shape all-in-one-piece hanging box is casted anchor structure.
As preferably, the top of described anchor plate is provided with the built-in pipe be set on flexible cable suspension rod, flexible shock reducing structure is provided with between built-in pipe and flexible cable suspension rod, the bucker being provided with taper above of built-in pipe, upper end and the flexible cable suspension rod of bucker fit tightly, and lower end and the built-in pipe of bucker fit tightly.Bucker is used for preventing external water stream from entering in built-in pipe, corrodes flexible cable suspension rod.In built-in pipe, arrange shock reducing structure, shock reducing structure can provide certain cushion effect, lowers the swing of flexible cable suspension rod to the full extent.
As preferably, two sides of described latch steel plate are equipped with ribs, and ribs is vertically arranged on the middle part of latch steel plate.Ribs, for strengthening the structural strength of latch steel plate, makes the stress equilibrium of latch steel plate distribute, and improves the application life of latch steel plate.
Therefore, the invention has the beneficial effects as follows: 1) this concrete bowstring arch bridge initiatively adds additional and has prestressed flexible cable suspension rod, for concrete suspension rod provides certain compressive stress deposit, eliminate its crack disease, improve arch rib, the distribution of tie-rod internal force, increase the rigidity of structure, improve load carrying capacity of bridge and durability; 2) this active enforcement method construct succinct, construct convenient, cost economic, textural overall appearance not affecting bridge; 3) flexible cable suspension rod, upper anchor structure and the structure that casts anchor are absolute construction, and in later stage operation process, newly-increased suspension rod can change adjustment boom internal force as required in time, and dismounting is simple and convenient.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of overall structure schematic diagram of the present invention;
Accompanying drawing 2 is a kind of section structure schematic diagrames of the present invention;
Accompanying drawing 3 is a kind of partial schematic diagrams of the present invention.
Shown in figure: the upper anchor structure of 1-concrete tie-rod, 2-concrete arch rib, 3-concrete suspension rod, 4-, 41-" U " shaped steel cover, 42-anchor bolt, 43-latch steel plate, 5-cast anchor structure, 51-hanging stirrup, 52-anchor plate, 6-flexible cable suspension rod, 61-otic placode, 62-pin, 63-ground tackle.
Detailed description of the invention
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
As shown in Figure of description 1, a kind of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge, concrete bowstring arch bridge structure comprises: concrete tie-rod 1, concrete arch rib 2, concrete arch rib 2 is curved, two ends and the concrete tie-rod 1 of concrete arch rib 2 are connected as a single entity, 13 equally distributed concrete suspension rods 3 are provided with between concrete arch rib 2 and concrete tie-rod 1, distance between adjacent concrete suspension rod 3 is 5 meters, concrete suspension rod 3 is vertically connected between concrete arch rib 2 and concrete tie-rod 1, concrete tie-rod 1 between adjacent concrete suspension rod 3 is provided with the structure 5 that casts anchor, at upper anchor structure 4 with cast anchor to be connected with between structure 5 there is prestressed flexible cable suspension rod 6, flexible cable suspension rod 6 is epoxy steel strand finished bundle, two bundle flexible cable suspension rods 6 are arranged on the both sides of concrete tie-rod 1 along the width of bridge floor.Upper anchor structure 4 is fixed with concrete arch rib 2, the structure 5 that casts anchor is fixed with concrete tie-rod 1, the two ends of flexible cable suspension rod 6 construct 4 respectively and are connected with the structure 5 that casts anchor with upper anchor, as Figure of description 2, shown in 3, wherein go up anchor structure 4 and comprise " U " shaped steel cover 41 straddled on concrete arch rib 2, " U " shaped steel cover 41 is adaptive also by anchor bolt 42 auxiliary positioning with concrete arch rib 2, adopt the anchoring of steel bonding glue simultaneously, concrete arch rib 2 is provided with two blocks of latch steel plates 43 below, latch steel plate 43 and " U " shaped steel overlap 41 piercing welding to be fixed, the upper end of flexible cable suspension rod 6 is connected with otic placode 61, otic placode 61 stretches between two latch steel plates 43, be connected with it by pin 62, the structure 5 that casts anchor comprises and hangs the hanging stirrup 51 of pocket at concrete tie-rod 1 lower edge, hanging stirrup 51 is adaptive and be provided with the anchoring steel bonding glue-line adopting viscose glue mode to be formed with concrete tie-rod 1, the side of hanging stirrup 51 is the casing of hollow, internal fixtion has anchor plate 52, anchor plate 52 is provided with the via hole be convenient to flexible cable suspension rod 6 and passed, the lower end of flexible cable suspension rod 6 is passed anchor plate 52 and adopts ground tackle 63 to be anchored on anchor plate 52, ground tackle 63 external diameter is greater than the aperture of via hole, the top of anchor plate 52 is provided with the built-in pipe be set on flexible cable suspension rod 6, flexible shock reducing structure is provided with between built-in pipe and flexible cable suspension rod 6, the bucker being provided with taper above of built-in pipe, upper end and the flexible cable suspension rod 6 of bucker fit tightly, lower end and the built-in pipe of bucker fit tightly, two sides of latch steel plate 43 are equipped with ribs, ribs is vertically arranged on the middle part of latch steel plate 43.
Its construction method, Specific construction operation is as follows:
Operation one, at adjacent concrete suspension rod 3 internode span centre concrete arch rib 2 upper limb, by the selected upper anchor point reinforcing each flexible cable suspension rod 6 of arch bridge of design, measure the radian size of this concrete arch rib 2 upper limb, " U " shaped steel cover 41 is made according to this size, and preservative treatment is done to " U " shaped steel cover 41, from concrete arch rib 2 upper limb, " U " shaped steel cover 41 is installed, by anchor bolt 42, " U " shaped steel is overlapped 41 auxiliary positioning on concrete arch rib 2, adopt steel bonding glue by " U " shaped steel cover 41 and concrete arch rib 2 anchoring simultaneously, concrete arch rib 2 is provided with two blocks of latch steel plates 43 below, latch steel plate 43 and " U " shaped steel overlap 41 and adopt piercing welding to fix,
Operation two, on concrete tie-rod 1, the lower anchor point of selected flexible cable suspension rod 6, lower edge shape according to lower anchor point concrete tie-rod 1 makes hanging stirrup 51, and preservative treatment is done to hanging stirrup 51, the side of hanging stirrup 51 is the casing of hollow, internal fixtion has anchor plate 52, installs hanging stirrup 51 from concrete tie-rod 1 lower edge, adopts pressure to inject steel bonding glue fix in concrete tie-rod 1 and hanging stirrup 51 junction;
Operation three, measure the distance of each flexible cable suspension rod 6 upper and lower anchor point anchor end one by one, customize each anchor point flexible cable suspension rod 6 finished product rope by measured size in finished product rope producer; On-the-spot one_to_one corresponding installs flexible cable suspension rod 6, is stretched between two blocks of latch steel plates 43 by its upper end otic placode 61, by pin 62, it is connected anchoring with latch steel plate 43; The lower end of flexible cable suspension rod 6 is anchored on anchor plate 52 through the via hole of the anchor plate 52 of the structure 5 that casts anchor by ground tackle 63;
Operation four, according to designing the order of specifying and stretching force, one by one to flexible cable suspension rod 6 Shi Hanzhang, the position of adjustment ground tackle 63, ground tackle 63 is made to abut against on anchor plate 52, in the process of Shi Hanzhang, the stress and displacement of complete monitoring concrete arch rib 2, concrete suspension rod 3 and concrete tie-rod 1 is answered to change;
Operation five, on upper and lower anchor point expose steel beam column scene mend anticorrosive coating.
The present invention has the following advantages:
A, set up flexible cable suspension rod and Shi Hanzhang at concrete rigid hanger internode span centre, add former concrete suspension rod compressive stress deposit on the one hand, eliminate the crack disease of concrete suspension rod, improve concrete arch rib, the distribution of concrete tie-rod internal force, improve load carrying capacity of bridge and durability; On the other hand multiple elastic support constraint is set up to the bowstring arch bridge space structures of internally indeterminate construction, increased the old bridge rigidity of structure, improve the comfortableness of driving and pedestrian bridge.
B, the newly-increased every suspension centre of suspension rod have two bundle drag-lines, and two bundle flexible cable suspension rods are arranged on the both sides of concrete tie-rod, and its upper end adopts otic placode to be connected with the latch steel plate that upper anchor constructs and is anchored in arch rib lower edge; Its lower end adopts ground tackle to be anchored in the side of tie-rod through the structure anchor plate that casts anchor.Prestressing force is passed to tie-rod and arch rib by the upper and lower anchoring structure of particular design by newly-increased suspension rod upper and lower side, and non-immediate is anchored on concrete tie-rod and arch rib component, makes strengthening construction to original structure almost not damaged.
C, newly-increased suspension rod adopt finished product rope, are flexible suspension rod, can act synergistically with former concrete tied arch structure, its advantage does not need grouting, and antiseptic property is good, and stretch-draw is convenient, later stage is changed easily, upper anchor structure and simple structure of casting anchor, and does not affect the overall aesthetics of former bridge.
If D bridge is runed for a long time in overload and oversize situation, destroying can first appear in newly-increased derrick rig, provides early warning, can effectively avoid bridge to occur brittle fracture.Newly-increased suspension rod power can do suitable adjustment as the case may be, practical.
In a word, the present invention has the advantages such as structure is succinct, convenient, the cost economic of constructing; Simultaneously, by to newly-increased suspension rod Shi Hanzhang, effectively can eliminate concrete suspension rod crack disease, increase concrete suspension rod compressive stress deposit, improve arch rib, the distribution of tie-rod internal force, increase the old bridge rigidity of structure, improve the comfortableness of driving and pedestrian bridge, improve load carrying capacity of bridge and durability, there is significant Social benefit and economic benefit.
Should be understood that this embodiment is only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.

Claims (3)

1. the suspension rod anchoring structure of an active enforcement concrete bowstring arch bridge, concrete bowstring arch bridge structure comprises: concrete tie-rod (1), concrete arch rib (2), several equally distributed concrete suspension rods (3) are provided with between concrete tie-rod (1) and concrete arch rib (2), described concrete arch rib (2) is curved, two ends and the concrete tie-rod (1) of concrete arch rib (2) are connected as a single entity, concrete suspension rod (3) is vertically connected between concrete arch rib (2) and concrete tie-rod (1), it is characterized in that, concrete arch rib (2) between adjacent concrete suspension rod (3) is provided with upper anchor structure (4), concrete tie-rod (1) between adjacent concrete suspension rod (3) is provided with the structure (5) that casts anchor, at upper anchor structure (4) with cast anchor to be connected with between structure (5) there is prestressed flexible cable suspension rod (6), described upper anchor structure (4) comprises " U " shaped steel cover (41) straddled on concrete arch rib (2), " U " shaped steel cover (41) is adaptive also by anchor bolt (42) auxiliary positioning with concrete arch rib (2), anchoring steel bonding glue-line is provided with between " U " shaped steel cover (41) and concrete arch rib (2), concrete arch rib (2) is provided with two blocks of latch steel plates (43) fixing with " U " shaped steel cover (41) piercing welding below, the upper end of described flexible cable suspension rod (6) is connected with otic placode (61), otic placode (61) stretches between two pieces of latch steel plates (43), be connected with it by pin (62), the described structure (5) that casts anchor comprises and hangs the hanging stirrup (51) of pocket at concrete tie-rod (1) lower edge, hanging stirrup (51) is adaptive with concrete tie-rod (1), anchoring steel bonding glue-line is provided with between hanging stirrup (51) and concrete tie-rod (1), the side of hanging stirrup (51) is the casing of hollow, casing internal fixtion has anchor plate (52), anchor plate (52) is provided with the via hole be convenient to flexible cable suspension rod (6) and passed, the lower end of flexible cable suspension rod (6) is passed anchor plate (52) and adopts ground tackle (63) to be anchored on anchor plate (52), ground tackle (63) external diameter is greater than the aperture of via hole.
2. the suspension rod anchoring structure of a kind of active enforcement concrete bowstring arch bridge according to claim 1, it is characterized in that, flexible cable suspension rod (6) between adjacent concrete suspension rod (3) has two bundles, and two bundles flexible cable suspension rod (6) are separately positioned on the both sides of concrete tie-rod (1).
3. a construction method for the suspension rod anchoring structure of active enforcement concrete bowstring arch bridge, is characterized in that, comprises following working procedure:
Operation one, at adjacent concrete suspension rod (3) internode span centre concrete arch rib (2) upper limb, the upper anchor point of arch bridge with each flexible cable suspension rod (6) is reinforced by design is selected, measure the radian size of this concrete arch rib (2) upper limb, " U " shaped steel cover (41) is made according to this size, and preservative treatment is done to " U " shaped steel cover (41), from concrete arch rib (2) upper limb, " U " shaped steel cover (41) is installed, by anchor bolt (42) by " U " shaped steel cover (41) auxiliary positioning on concrete arch rib (2), adopt steel bonding glue by " U " shaped steel cover (41) and concrete arch rib (2) anchoring simultaneously, concrete arch rib (2) is provided with two pieces of latch steel plates (43) below, latch steel plate (43) and " U " shaped steel cover (41) adopt piercing welding to fix,
Operation two, on concrete tie-rod (1), the lower anchor point of selected flexible cable suspension rod (6), lower edge shape according to lower anchor point concrete tie-rod (1) makes hanging stirrup (51), and preservative treatment is done to hanging stirrup (51), the side of hanging stirrup (51) is the casing of hollow, internal fixtion has anchor plate (52), installs hanging stirrup (51) from concrete tie-rod (1) lower edge, adopts pressure to inject steel bonding glue fix in concrete tie-rod (1) and hanging stirrup (51) junction;
Operation three, measure the distance of each flexible cable suspension rod (6) upper and lower anchor point anchor end one by one, customize each anchor point flexible cable suspension rod (6) finished product rope by measured size in finished product rope producer; On-the-spot one_to_one corresponding installs flexible cable suspension rod (6), is stretched between two pieces of latch steel plates (43) by its upper end otic placode (61), by pin (62), it is connected anchoring with latch steel plate (43); The lower end of flexible cable suspension rod (6) is anchored on anchor plate (52) through the via hole of the anchor plate (52) of structure (5) of casting anchor and by ground tackle (63);
Operation four, according to designing the order of specifying and stretching force, one by one to flexible cable suspension rod (6) Shi Hanzhang, the position of adjustment ground tackle (63), ground tackle (63) is made to abut against on anchor plate (52), in the process of Shi Hanzhang, the stress and displacement of complete monitoring concrete arch rib (2), concrete suspension rod (3) and concrete tie-rod (1) is answered to change;
Operation five, on upper and lower anchor point expose steel beam column scene mend anticorrosive coating.
CN201310184699.7A 2013-05-16 2013-05-16 A kind of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge and construction method thereof CN103410090B (en)

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