CN104746435A - Wide-angle Y-shaped pier column construction method - Google Patents

Wide-angle Y-shaped pier column construction method Download PDF

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Publication number
CN104746435A
CN104746435A CN201510158219.9A CN201510158219A CN104746435A CN 104746435 A CN104746435 A CN 104746435A CN 201510158219 A CN201510158219 A CN 201510158219A CN 104746435 A CN104746435 A CN 104746435A
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layer
suspension cable
pier stud
construction
concrete
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CN201510158219.9A
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Chinese (zh)
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CN104746435B (en
Inventor
石丰祥
余流
高璞
王安鑫
刘跃武
周俊龙
李飞
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中国建筑第六工程局有限公司
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00Bridges characterised by the cross-section of their bearing spanning structure
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/268Composite concrete-metal
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/28Concrete reinforced prestressed

Abstract

The invention discloses a wide-angle Y-shaped pier column construction method; the construction method comprises the steps: pouring a Y-shaped pier column at six stages from a layer I to a layer VI; mounting scaffolds on a support platform to pour concrete on the layers I and II of the pier column; installing a corbel, a formed steel frame and a distribution beam; anchoring first long stay cables and short stay cables; pouring concrete on the layer III of the pier column; cutting the first long stay cables and dismounting formworks of the III-layer concrete; anchoring second long stay cables; pouring concrete on the layers IV and V of the pier column; stretching horizontal tensile steel strands, dismounting the upper structural part of the formed steel frame and the second long stay cables; mounting the scaffolds at the lower structural part of the formed steel frame to pour concrete on the layer VI and gradually stretching the horizontal tensile steel brands to be 100% during pouring. By adopting segmented construction measures and a stay support system, the technical problem in the traditional construction is solved effectively, the structural and construction safety is ensured and the cost of the operating platform is reduced remarkably.

Description

A kind of construction method of great-angle Y type pier stud
Technical field
The present invention relates to field of bridge construction, specifically, relate to a kind of bridge Y type pier stud construction method.
Background technology
Closely during the last ten years, there is some prestressed concretes Y type supporting bridge both at home and abroad, comprised Y type and support continuous girder bridge and continuous rigid frame bridge.Compared with straight leg rigid frame bridge, under the V pier effect of prestressed concrete Y type pier continuous rigid frame bridge, girder span can obviously shorten, and the negative bending moment peak value supporting shoulder also reduces to some extent, thus make structure become light and handy and very thin, be conducive to selecting box girder with variable cross section form, profile is comparatively elegant in appearance, as shown in Figure 1.
Wherein, between its " V " shape two oblique limb leg angle be greater than 90 ° can be called great-angle Y type pier stud, this structure is higher to construction technical requirement, is mainly reflected in:
1. structure self the concrete scale of construction is large, can not establish one's own system, need strong support at the pre-structure of the prestressed stretch-draw of top binder;
2. the oblique limb leg of great-angle Y type pier pier shaft operation platform is set up, reinforcing bar binding and the operation easier such as fixing, model sheetinstallat and reinforcing location larger;
3. the reinforcing bar eccentricity issues such as the pre-buried and oblique limb leg of shape of great-angle Y type pier is difficult to control;
4. great-angle Y type pier variable cross-section section reinforcing bar density is high, and the outward appearance of concreting is difficult to control;
5. when the bridge pier of great-angle Y type pier is arranged in the river that riverbed sludge is thicker, river is darker, by the restriction of the depth of water and riverbed earthen condition, erection construction support acquires a certain degree of difficulty, and key issue is that steel pipe pile sedimentation is difficult to control.
Summary of the invention
The present invention is to solve there is the technical problem of above-mentioned multiple difficulty in existing great-angle Y type pier stud construction, a kind of construction method of great-angle Y type pier stud is provided, can ensure that its " V " shape two oblique limb leg coupling part concrete tensile stress does not exceed design allowed band all the time, and ensure structural safety and construction safety.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
A kind of construction method of great-angle Y type pier stud, Y type pier stud is divided into the Ith layer to the VIth layer six section to build by this construction method from the bottom to top successively, wherein the Ith layer is the straightway of more than cushion cap, IIth layer is the coupled section of straightway to the transition of oblique limb leg section, IIIth layer is the oblique limb leg section of 2/3 vertical height, IVth layer is the oblique limb leg section of 1/3 vertical height, and the Vth layer is the oblique limb leg extension at binder two ends, and the VIth layer is unsettled section in the middle part of binder; Based on above division, this construction method comprises the steps:
(1) support set up by cushion cap, build pier stud the Ith layer concrete;
(2) support set up by cushion cap, build pier stud the IIth layer concrete; Pre-buried bracket in casting process also sets up the structural steel frame with two-layer section steel beam, and bracket is embedded near the IIth layer concrete upper surface place in advance, the IIth layer concrete of nuzzling in advance bottom structural steel frame;
(3) complete the installation of bracket, and distribution beam bottom is connected to bracket, upper end is connected to stiff skeleton temporarily;
(4) at the structural steel frame both sides difference long suspension cable of anchoring first and short suspension cable; First long suspension cable one end is anchored in lower floor's section steel beam end of structural steel frame, and the other end is anchored in the beam section of corresponding IIIth layer concrete of distribution beam; Short suspension cable one end is anchored in lower floor's section steel beam end of structural steel frame, and the other end is anchored in stiff skeleton;
(5) pier stud the IIIth layer concrete is built;
(6) cut off the first long suspension cable, remove the template of the IIIth layer concrete;
(7) at the long suspension cable of structural steel frame both sides difference anchoring second; Second long suspension cable one end is anchored in the section steel beam end, upper strata of structural steel frame, and the other end is anchored in the beam section that distribution beam corresponds to the IVth layer concrete;
(8) build pier stud the IVth layer concrete and the Vth layer concrete simultaneously;
After (9) the IVth layer concretes and the Vth layer concrete reach design strength, the horizontal steel strand of stretch-draw, to 50% of design load, removes structure division and the second long suspension cable that structural steel frame exceeds binder;
(10) utilize the remaining structure of structural steel frame to set up support, build the VIth layer concrete, in casting process gradually by horizontal steel strand stretch-draw to 100%;
(11) reach after designing requirement intensity until concrete, to the steel Shu Jinhang stretch-draw of Y type pier stud, anchoring, mud jacking;
(12) remaining structure of structural steel frame, horizontal steel strand, distribution beam, short suspension cable and all temporary structures is removed.
Wherein, described structural steel frame is two story frame structures that section steel beam and steel column form, and steel column is welded with stiffening rib, and bean column node adopts high-strength bolt to connect.
Wherein, described distribution beam is by the rectilinear structure of two i shaped steel assembly weldings, is provided with the lumps of wood to fill space between described distribution beam and Y type pier stud oblique limb leg steel form.
Wherein, the pre-buried degree of depth of described bracket is apart from the IIth layer concrete upper surface at least 50cm.
Wherein, described first long suspension cable, described second long suspension cable, described short suspension cable all adopt diameter to be the fining twisted steel of 32mm.
Wherein, described first long suspension cable one end is anchored in lower floor's section steel beam end of structural steel frame, and the other end is anchored in the central point that distribution beam corresponds to the IIIth layer concrete beam section; And described first long suspension cable is perpendicular to described distribution beam.
Wherein, described short suspension cable is parallel with described first long suspension cable.
Wherein, described second long suspension cable one end is anchored in the section steel beam end, upper strata of structural steel frame, and the other end is anchored in the central point that distribution beam corresponds to the IVth layer concrete beam section; And described second long suspension cable is perpendicular to described distribution beam.
The invention has the beneficial effects as follows:
The segmental construction measure that great-angle Y type pier stud construction method of the present invention adopts non-once to build, and adopt the mode of oblique pull supporting system to construct to the oblique limb leg of V-type two, duration and economic dispatch factor are considered, efficiently solve the technical barrier of great-angle Y type pier stud in construction, ensure that structural safety and construction safety, significantly reduce installation and the material cost of operating platform, and have the advantages that can be recycled, further save cost, the construction of prestressed concrete great-angle Y type pier stud can be widely used in.
Accompanying drawing explanation
Fig. 1 is the structural representation of great-angle Y type pier stud;
Fig. 2 is the Y type pier stud concrete delamination cast schematic diagram adopted in construction method of the present invention;
Fig. 3 is the elevation of the oblique pull support system adopted in construction method of the present invention;
Fig. 4 is the plan view of Fig. 3;
Fig. 5 is schematic diagram when building straight line portion (the Ith layer and the IIth layer) pier stud in construction method of the present invention;
Fig. 6 is schematic diagram when building the IIIth layer of pier stud in construction method of the present invention.
In figure: 1, structural steel frame, 2, anchor device, 3-1, the first long suspension cable, 3-2, the second long suspension cable, 4, horizontal steel strand, 5, binder, 6, steel pipe shellfish thunder support platform, 7, short suspension cable, 8, bracket, 9, distribution beam, 10, pier stud, 11, cushion cap, 12, stiff skeleton, 13, full framing.
Detailed description of the invention
For summary of the invention of the present invention, feature and effect can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
The invention provides a kind of construction method of great-angle Y type pier stud, the Y type pier stud that between " V " shape two oblique limb leg that this construction method is mainly applicable to its pier stud 10 pier shaft, angle is greater than 90 °, this great-angle Y type pier stud can not establish one's own system at the pre-structure of the prestressed stretch-draw of top binder 5, must rely on strong external bracing.
Y type pier stud can be regarded as successively according to the difference of cross sectional shape from lower to upper and comprise straightway, straightway to the coupled section of oblique limb leg section transition, tiltedly limb leg section and binder 5.In the present invention, Y type pier stud concrete adopts placement layer by layer according to the convenience of the setting of oblique pull support system and construction, be divided into the Ith layer to the VIth layer six section, the supporting way of different section in work progress is different, its partitioning standards mainly reasonable concrete square amount that can bear of oblique pull support system and coordinating with construction sequence.As shown in Figure 2, the Ith layer is the straightway of cushion cap more than 11; IIth layer is the coupled section of more than the Ith layer straightway to the transition of oblique limb leg section, and the height of the IIth layer is by cushion cap 11 size restrictions, and its extension should be able to meet to be set up full framing 13 and build on cushion cap 11; IIIth layer is the oblique limb leg section of more than the IIth layer 2/3 vertical height, IVth layer is the oblique limb leg section of more than the IIIth layer 1/3 vertical height, partitioning standards between IIIth layer and the IVth layer is the concrete square amount as far as possible reducing the large sections of oblique limb leg section jib-length, namely be reduce the moment size in moment of flexure, consider the stressing conditions of oblique pull braced structures and the convenience of construction simultaneously; Vth layer is the oblique limb leg extension at binder 5 two ends, and the VIth layer is unsettled section in the middle part of binder 5.Vth layer and the VIth layer divides according to the difference of support pattern, and wherein the weight concrete of the VIth layer bears by the structural steel frame 1 be embedded in pier stud 10 sets up full framing again, and the weight concrete of the Vth layer is born by oblique pull support system.
Y type pier stud longitudinally wide 32.0m, laterally vertical wide 23.0m, pier height 17.169m, wherein the inverted triangle part height 11.085m of the present embodiment, between the oblique limb leg of " V " shape two of inverted triangle part, angle is 103.2 °, Coupling point position concrete section height 2.5m; The oblique limb leg of " V " shape two of this structure can not establish one's own system at the pre-structure of top binder 5 prestressed stretch-draw, and the angle of the oblique limb leg of " V " shape two makes greatly traditional full hall construction bracket platform, reinforcing bar binding and fixing, model sheetinstallat and the constructing operation difficulty such as fixing.
According to above-mentioned size, in the present embodiment, six section partitions of Y type pier stud are specific as follows: the Ith layer is the straightway that cushion cap more than 11 3.6m is high; IIth layer is straightway that more than the Ith layer 5.2m the is high coupled section to the transition of oblique limb leg section; IIIth layer and the IVth layer be oblique limb leg section high for vertical distance 6.2m in 3:2 ratio separately, namely the IIIth layer of to be more than the IIth layer vertical height be 3.72m oblique limb leg section, the oblique limb leg section of the IVth layer of to be more than the IIIth layer vertical height be 2.48m; And the high binder 5 of 1.2m is divided into three parts and builds, unsettled section in the middle part of it the VIth layer is that 18m is long, and each 7m in the Vth layer, oblique limb leg extension at two ends is long; The concrete of the IIIth layer, the IVth layer and the Vth layer needs symmetry to build.
Based on the division of above six concreting parts, the construction method of the great-angle Y type pier stud that the present embodiment provides, its concrete steps are as follows:
(1) on cushion cap 11, set up full framing 13, the reinforcing bar of colligation pier stud 10 the Ith layer concrete, pre-buried corrugated pipe pipeline, installs template; Flat bed stone method is adopted to build the Ith layer concrete, along the long limit successively horizontal stone in face, storehouse, first floor making after vibration compacting, then making vibrates the second layer, every layer of layer thickness is 40cm, reaches the Ith layer concrete Construction Elevation successively; As shown in Figure 5.
(2) on cushion cap 11, set up full framing 13, the reinforcing bar of colligation pier stud 10 the IIth layer concrete, the position of adjustment, fixing corrugated pipe pipeline, installs template; Flat bed stone method is adopted to build the IIth layer concrete, along the long limit successively horizontal stone in face, storehouse, first floor making after vibration compacting, then making vibrates the second layer, every layer of layer thickness is 40cm, reaches the IIth layer concrete Construction Elevation successively; As shown in Figure 5.
In the casting process of the IIth layer concrete, carry out the Embedment Construction of bracket 8 pre-embedded steel slab at the design attitude near the IIth layer of pier stud 10 upper surface, for ensureing that pre-buried effect need ensure that its pre-buried degree of depth is apart from pier stud 10 the IIth layer concrete upper surface at least 50cm.
In the casting process of the IIth layer concrete, set up structural steel frame 1 simultaneously, according in " Code for design of concrete structures ", the calculation requirement of built-in fitting and connector is nuzzled the IIth layer concrete certain depth in advance bottom structural steel frame 1; As shown in Figure 3.The concrete pre-buried degree of depth of structural steel frame 1 can calculate according to 8.3.1 bar tensile reinforcement anchorage length in " Code for design of concrete structures " (GB 50020-2010), and demand fulfillment 9.7 saves detailing requiments concrete in built-in fitting and connector.
Wherein, structural steel frame 1 is two story frame structures (namely section steel beam is provided with two-layer up and down) that section steel beam and steel column form, wherein section steel beam and steel column are made by I70b, and steel column is welded with stiffening rib every 80cm in vertical height, and bean column node adopts high-strength bolt to connect.The upper and lower two-layer section steel beam height of structural steel frame 1 is on the basis of 90 degree of angles meeting the first long suspension cable 3-1, the second long suspension cable 3-2 and outside distribution beam 9 axis as far as possible, and the force request according to oblique pull support system is determined.
(3) the IIth layer concretes complete the welding of bracket 8 after building; Distribution beam 9 bottom is fixedly connected on bracket 8, and distribution beam 9 upper end is first connected with stiff skeleton 12 temporarily, treats that suspension cable and its anchoring are as the strong point; As shown in Figure 3.
Wherein, distribution beam 9 is by the rectilinear structure of 2 I40b shaped steel assembly weldings, and due to the lateral surface of Y type pier stud oblique limb leg section be curved surface, also need add the lumps of wood to fill space between its steel form and distribution beam 9, to ensure that the weight concrete born by Y type pier stud oblique limb leg section outboard template is effectively delivered in distribution beam 9.
(4) the first long suspension cable 3-1 and short suspension cable 7 that anchoring the IIIth layer concrete is corresponding respectively in structural steel frame 1 both sides, the weight concrete of oblique for " V " shape two limb leg can be delivered to structural steel frame 1 by the first long suspension cable 3-1 and short suspension cable 7, so be delivered to built part pier stud 10 on.
First long suspension cable 3-1 is 8, every side, and one end is connected to lower floor's section steel beam end of structural steel frame 1 by anchor device 2; The other end is anchored in distribution beam 9, and concrete anchorage point is the beam section central point that distribution beam 9 corresponds to the IIIth layer concrete lateral surface; And the first long suspension cable 3-1 keeps perpendicular to distribution beam 9 as far as possible.
Short suspension cable 7 is also 8, every side, and one end is connected to lower floor's section steel beam end of structural steel frame 1 by anchor device 2, consistent with the anchor point of corresponding first long suspension cable 3-1; The other end is anchored in the pre-embedded steel slab of stiff skeleton 12 inside; Short suspension cable 7 keeps parallel with the first long suspension cable 3-1 as far as possible; As shown in Figure 3 and Figure 4;
First long suspension cable 3-1 and short suspension cable 7 all adopt Φ 32 finish rolling deformed bar, are all by power.The quantity of the first long suspension cable 3-1 and short suspension cable 7 is arranged according to the width of direction across bridge pier stud 10, and general every side arranges force request and the construction safety that 8 can meet structure.
(5) using steel pipe shellfish thunder support platform 6 as casting platform, the reinforcing bar of colligation pier stud 10 the IIIth layer concrete, pre-buried corrugated pipe pipeline, installs template; Flat bed stone method is adopted to build the IIIth layer concrete, along the long limit successively horizontal stone in face, storehouse, first floor making after vibration compacting, then making vibrates the second layer, every layer of layer thickness is 40cm, reaches the IIIth layer concrete Construction Elevation successively; As shown in Figure 6.
After (6) the IIIth layer concretes are built, cut off the first long suspension cable 3-1 be anchored in the distribution beam 9 of outside, retain the short suspension cable 7 be anchored on stiff skeleton 12, remove the template of the IIIth layer concrete simultaneously, use to facilitate other pier studs;
(7) the second long suspension cable 3-2 that anchoring the IVth layer concrete is corresponding respectively in structural steel frame 1 both sides, the weight concrete of oblique for " V " shape two limb leg can be delivered to structural steel frame 1 by the second long suspension cable 3-2, so be delivered to built part pier stud 10 on.
Second long suspension cable 3-2 is 8, every side, and one end is connected to the section steel beam end, upper strata of structural steel frame 1 by anchor device 2, and the other end is anchored in distribution beam 9, and concrete anchorage point is the beam section central point that distribution beam 9 corresponds to the IVth layer concrete lateral surface; Second long suspension cable 3-2 keeps perpendicular to distribution beam 9 as far as possible; As shown in Figure 3.
Second long suspension cable 3-2 adopts Φ 32 finish rolling deformed bar, is all by power.The quantity of the second long suspension cable 3-2 is arranged according to the width of direction across bridge pier stud 10, and general every side arranges force request and the construction safety that 8 can meet structure.
(8) reinforcing bar of colligation pier stud 10 the IVth layer concrete and the Vth layer concrete while, pre-buried corrugated pipe pipeline, installs template; Flat bed stone method is adopted to build the IVth layer and the Vth layer concrete, along the long limit successively horizontal stone in face, storehouse, first floor making after vibration compacting, then making vibrates the second layer, every layer of layer thickness is 40cm, reaches the Construction Elevation of the Vth layer concrete successively;
(9) after the IVth layer concrete and the Vth layer concrete reach design strength, along the horizontal steel strand 4 of binder 5 lower edge stretch-draw to 50% of design load, horizontal steel strand 4 two ends are anchored in outside distribution beam 9; And temporary fixed between dismountable distribution beam 9 upper end and stiff skeleton 12.Remove structural steel frame 1 exceed the structure division of binder 5 and the IVth layer concrete corresponding the second long suspension cable 3-2, the works for binder 5 is shaping reserves operating space.Now the weight of the oblique limb leg of " V " shape two relies on the horizontal steel strand 4 of stretch-draw 50%, is anchored at short suspension cable 7 between structural steel frame 1 and stiff skeleton 12, bracket 8 strong point common support of distribution beam 9 lower end;
(10) utilize structural steel frame 1 to remove rear remaining structure division and set up support, the reinforcing bar of colligation pier stud 10 the VIth layer concrete, pre-buried corrugated pipe pipeline, installs template; Flat bed stone method is adopted to build the VIth layer concrete, along the long limit successively horizontal stone in face, storehouse, first floor making after vibration compacting, then making vibrates the second layer, every layer of layer thickness is 40cm, reaches the Construction Elevation of the VIth layer concrete successively.In casting process, gradually the stretch-draw of horizontal steel strand 4 to 100%, to resist the pressure that top the VIth layer concrete causes the oblique limb leg of " V " shape.
(11) after whole concrete of Y type pier stud reach designing requirement intensity, to the steel Shu Jinhang stretch-draw of Y type pier stud, anchoring, mud jacking.
(12) now can remove unified to the remaining structure of structural steel frame, horizontal steel strand, short suspension cable and all temporary structures.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make the concrete conversion of a lot of form, these all belong within protection scope of the present invention.

Claims (8)

1. the construction method of a great-angle Y type pier stud, it is characterized in that, Y type pier stud is divided into the Ith layer to the VIth layer six section to build by this construction method from the bottom to top successively, wherein the Ith layer is the straightway of more than cushion cap, IIth layer is the coupled section of straightway to the transition of oblique limb leg section, and the IIIth layer is the oblique limb leg section of 2/3 vertical height, and the IVth layer is the oblique limb leg section of 1/3 vertical height, Vth layer is the oblique limb leg extension at binder two ends, and the VIth layer is unsettled section in the middle part of binder; Based on above division, this construction method comprises the steps:
(1) support set up by cushion cap, build pier stud the Ith layer concrete;
(2) support set up by cushion cap, build pier stud the IIth layer concrete; Pre-buried bracket in casting process also sets up the structural steel frame with two-layer section steel beam, and bracket is embedded near the IIth layer concrete upper surface place in advance, the IIth layer concrete of nuzzling in advance bottom structural steel frame;
(3) complete the installation of bracket, and distribution beam bottom is connected to bracket, upper end is connected to stiff skeleton temporarily;
(4) at the structural steel frame both sides difference long suspension cable of anchoring first and short suspension cable; First long suspension cable one end is anchored in lower floor's section steel beam end of structural steel frame, and the other end is anchored in the beam section of corresponding IIIth layer concrete of distribution beam; Short suspension cable one end is anchored in lower floor's section steel beam end of structural steel frame, and the other end is anchored in stiff skeleton;
(5) pier stud the IIIth layer concrete is built;
(6) cut off the first long suspension cable, remove the template of the IIIth layer concrete;
(7) at the long suspension cable of structural steel frame both sides difference anchoring second; Second long suspension cable one end is anchored in the section steel beam end, upper strata of structural steel frame, and the other end is anchored in the beam section that distribution beam corresponds to the IVth layer concrete;
(8) build pier stud the IVth layer concrete and the Vth layer concrete simultaneously;
After (9) the IVth layer concretes and the Vth layer concrete reach design strength, the horizontal steel strand of stretch-draw, to 50% of design load, removes structure division and the second long suspension cable that structural steel frame exceeds binder;
(10) utilize the remaining structure of structural steel frame to set up support, build the VIth layer concrete, in casting process gradually by horizontal steel strand stretch-draw to 100%;
(11) reach after designing requirement intensity until concrete, to the steel Shu Jinhang stretch-draw of Y type pier stud, anchoring, mud jacking;
(12) remaining structure of structural steel frame, horizontal steel strand, distribution beam, short suspension cable and all temporary structures is removed.
2. the construction method of a kind of great-angle Y type pier stud according to claim 1, it is characterized in that, described structural steel frame is two story frame structures that section steel beam and steel column form, and steel column is welded with stiffening rib, and bean column node adopts high-strength bolt to connect.
3. the construction method of a kind of great-angle Y type pier stud according to claim 1, it is characterized in that, described distribution beam is by the rectilinear structure of two i shaped steel assembly weldings, is provided with the lumps of wood to fill space between described distribution beam and Y type pier stud oblique limb leg steel form.
4. the construction method of a kind of great-angle Y type pier stud according to claim 1, is characterized in that, the pre-buried degree of depth of described bracket is apart from the IIth layer concrete upper surface at least 50cm.
5. the construction method of a kind of great-angle Y type pier stud according to claim 1, is characterized in that, described first long suspension cable, described second long suspension cable, described short suspension cable all adopt diameter to be the fining twisted steel of 32mm.
6. the construction method of a kind of great-angle Y type pier stud according to claim 1, it is characterized in that, described first long suspension cable one end is anchored in lower floor's section steel beam end of structural steel frame, and the other end is anchored in the central point that distribution beam corresponds to the IIIth layer concrete beam section; And described first long suspension cable is perpendicular to described distribution beam.
7. the construction method of a kind of great-angle Y type pier stud according to claim 1, is characterized in that, described short suspension cable is parallel with described first long suspension cable.
8. the construction method of a kind of great-angle Y type pier stud according to claim 1, it is characterized in that, described second long suspension cable one end is anchored in the section steel beam end, upper strata of structural steel frame, and the other end is anchored in the central point that distribution beam corresponds to the IVth layer concrete beam section; And described second long suspension cable is perpendicular to described distribution beam.
CN201510158219.9A 2015-04-03 2015-04-03 A kind of construction method of great-angle Y type pier stud CN104746435B (en)

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CN105201208A (en) * 2015-08-12 2015-12-30 郑州市第一建筑工程集团有限公司 System for dismantling Y-type pier column oblique rod steel mold
CN105350458A (en) * 2015-11-16 2016-02-24 中国建筑第六工程局有限公司 Construction method of composite structure platform for construction of Y-shaped pier of bridge
CN105625186A (en) * 2015-12-31 2016-06-01 浙江舜杰建筑集团股份有限公司 Method for constructing large-section concrete Y-shaped column
CN105821770A (en) * 2016-04-01 2016-08-03 上海城建市政工程(集团)有限公司 Connecting and locating method for multiple tower roots and large-size concrete bearing platform foundation of steel structure main tower
CN107974953A (en) * 2017-12-20 2018-05-01 沈阳建筑大学 A kind of method of raising Y type bridge pier shock resistances
CN109083023A (en) * 2018-09-06 2018-12-25 重庆交通大学 Using the continuous rigid frame bridge and its construction method of stiff skeleton

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