CN109736206A - Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method - Google Patents

Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method Download PDF

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Publication number
CN109736206A
CN109736206A CN201910081934.5A CN201910081934A CN109736206A CN 109736206 A CN109736206 A CN 109736206A CN 201910081934 A CN201910081934 A CN 201910081934A CN 109736206 A CN109736206 A CN 109736206A
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block
cast
platform
bottom plate
closure segment
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CN109736206B (en
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岳峰
桑伟
李舒扬
陈轩区
张�成
尹彩琴
金之昂
徐斌
乔建迪
宣伟
王婧颖
竺曙东
段群苗
周一勤
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Ningbo Communication Engineering Construction Group Co Ltd
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Ningbo Communication Engineering Construction Group Co Ltd
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Abstract

The invention discloses a kind of Wavelike steel webplate continuous bridge end bays to close up cast-in-place support structure and construction method, structure therein mainly includes cast-in-place support and falsework this two parts, and have the following characteristics that one, two bracket is independently system, when removing falsework after the completion of several piece cast-in-situ box girder will not interference effect cast-in-place support bearing capacity and stability;Two, it is easy to operate to remove falsework;Three, the absolute altitude for efficiently using Wavelike steel webplate suspended casting suspended basket end template sunpender, the frame bolt support of stiff skeleton or adjusting closure segment bottom plate platform, economizes on resources.Therefore, this Wavelike steel webplate continuous bridge end bay, which closes up cast-in-place support structure, has many advantages, such as easy to operate efficient, safe and reliable, quality assurance, the collapse accident occurred when being avoided that the cast-in-situ box girder outermost end bottom part length full framing and operating platform of removing cast-in-place completion in conjunction with corresponding construction method, also have the effect of energy-saving and emission-reduction, economic benefit and social benefit are significant.

Description

Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method
Technical field
The present invention relates to a kind of Wavelike steel webplate continuous bridge end bay closure construction fields, in particular to Wavelike steel webplate to connect Continuous beam bridge end bay closes up cast-in-place support structure and construction method.
Background technique
The construction of Wavelike steel webplate continuous bridge end bay closure segment, usually sets up full framing structure cast-in-place number in Abutment Block box beam, then the cantilever boxgirder for extending with adjacent bridge pier cantilever pouring and arriving carry out closure segment construction.Due to the cast-in-place case of Abutment Beam outermost end is needed there are the operating platform of certain length, and adjacent bridge pier cantilever pouring extends and the cantilever boxgirder that arrives is by Hanging Basket The cantilever pouring of system forms, and the end template of closure segment needs to be supported on Hanging Basket bottom plate platform and the case with Cast-in-Situ Segment outermost end Beam bottom linking, therefore the cast-in-situ box girder outermost end bottom part length full framing and operating platform of cast-in-place completion need to be removed, and Full framing collapse accident easily occurs in demolishing process.
Summary of the invention
The technical problem to be solved by the present invention lies in overcoming the defects of the prior art and provides a kind of easy to operate, safety Reliably, quality assurance, energy-saving and emission-reduction Wavelike steel webplate continuous bridge end bay close up cast-in-place support structure and construction method.
Technical problem of the invention is achieved through the following technical solutions:
A kind of Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure, including abutment and the heavily fortified point for riding upon adjacent Abutment Full framing on base on the spot, the full framing are made of cast-in-place support and falsework;On the cast-in-place support The length of several piece cast-in-situ box girder equipped with (n+1)~(n+5) number block, the cast-in-place support is more cast-in-place to the several piece than abutment outermost Short Δ=30cm~the 50cm of the length of box beam least significant end, and the load of independent bearing several piece cast-in-situ box girder, the cast-in-place case of the least significant end Beam is (n+1) number block;Δ=30cm~the 50cm is closure segment, that is, n block template platform inserting paragraph;The interim branch Frame length is Δ+L, is the total length that falsework land lengths L is added by inserting paragraph Δ=30cm~50cm length, this is interim Bracket and cast-in-place support are equipped with the firm horizontal connection rod piece of lateral connection, and remove falsework without will affect cast-in-place support Stress.
(n+1) number block least significant end of (n+1)~(n+5) number block several piece cast-in-situ box girder is arranged closure segment, that is, No. n Block, cantilever boxgirder (n-1) number block for extending with adjacent bridge pier cantilever pouring and arriving are connected, and in (n-1) number block and (n+1) number Stiff skeleton is installed respectively in the top plate and bottom plate of block, which is fixed by frame bolt;Described (n+1) number block bottom plate N block template platform, i.e. one end of closure segment bottom plate platform are installed in the frame bolt lower end of upper stiff skeleton, and the other end closes Hold together section bottom plate platform by Hanging Basket end template platform, the abdomen of the closure segment bottom plate platform closure segment of the formation The template of plate and top plate.
The closure segment, that is, n block is longitudinally being variable section structure along bridge, in closure segment, that is, n block cast-in-situ box girder lotus It carriesUnder effect, the frame bolt lower end C installation n block template platform of stiff skeleton is closed on (n+1) number block bottom plate One end stress for holding together section bottom plate platform is, other end closure segment bottom plate platform is by Hanging Basket end template platform E branch Support, stress are, one end, that is, n block template platform stress of closure segment bottom plate platform is calculated by following equation And structure safe coefficient:
Formula one,
Formula two,
Simultaneously, it is desirable that two groups of Hanging Basket end template sunpenders are other than bearing Hanging Basket end template platform itself load of Hanging Basket system, also Bear closure segment i.e. n block cast-in-situ box girder load action;
Symbol definition in formula one and formula two are as follows:
--- the cast-in-situ box girder load of closure segment, that is, n block and number block joint (n-1),
--- the cast-in-situ box girder load of closure segment, that is, n block and number block joint (n+1),
--- the cast-in-situ box girder load of any point and number block joint (n+1) in closure segment, that is, n block,
--- any point and number block joint (n+1) are at a distance from starting point in closure segment, that is, n block,
--- closure segment, that is, n block template platform one end is anchored on (n+1) number block bottom plate under the frame bolt of stiff skeleton It holds at a distance from C and n block joint,
--- closure segment, that is, n block along bridge axial direction length,
--- closure segment, that is, n block and number block joint (n-1) to the n block template platform other end are anchored at Hanging Basket end template The distance of E on platform,
--- closure segment, that is, n block template platform one end is anchored on (n+1) number block bottom plate under the frame bolt of stiff skeleton The pulling force of C is held,
--- closure segment, that is, n block and number block joint (n-1) to the n block template platform other end are anchored at Hanging Basket bed die The support force at the end E on plate platform,
--- closure segment, that is, n block template platform one end is anchored at the frame bolt of stiff skeleton on (n+1) number block bottom plate Lower end C's allows pulling force,
--- falsework allowable bearing,
The cast-in-situ box girder is made of top plate and bottom plate and web, the top plate and bottom plate difference of (n+1) number block cast-in-situ box girder For (n+1) number block top plate, (n+1) number block bottom plate;(n-1) top plate and bottom plate of number block cast-in-situ box girder is respectively number block top (n-1) Plate, (n-1) number block bottom plate.
The stiff skeleton is steel components, before closure segment, that is, n block template platform, reinforcing bar and concrete of constructing Make positioning to fix, and is fixed between (n+1) number block top plate and (n-1) number block top plate with frame bolt respectively, number block bottom (n+1) Between plate and (n-1) number block bottom plate.
The Hanging Basket system is steel components, is hung by Hanging Basket support, Hanging Basket end template platform and two groups of Hanging Basket end templates Bar composition;The described Hanging Basket support is the walking mechanism of Hanging Basket system, the movable pulley of Hanging Basket system by Wavelike steel webplate top It supports and moves;Two groups of Hanging Basket end template boom foots suspend Hanging Basket end template platform in midair.
The n block template platform is n block, that is, closure segment template system, and it is cast-in-place which bears n block The whole load of box beam.
A kind of Wavelike steel webplate continuous bridge end bay closes up the construction method of cast-in-place support structure, includes the following steps:
Step 1: setting up cast-in-place support and falsework
1. compacting foundation is basic, joints cement concrete topping, it is desirable that be able to bear box-beam structure and cast-in-place support, falsework Bearing capacity;
2. length=several piece cast-in-situ box girder of cast-in-place support is (n+1) by related standard criterion design cast-in-place support and falsework ~(n+5) numbers block length-Δ (Δ=30cm~50cm), falsework length=operating platform length L+ Δ (Δ=30cm~ 50cm);
3. setting up the cast-in-place support and falsework of independent architectonical respectively, then with horizontal connection rod piece by cast-in-place support and temporarily Bracket lateral connection is secured;
4. being laid with cast-in-situ box girder template;
5. falsework bearing capacity, which must be greater than, allows to carry with concrete block precompressed cast-in-place support and falsework and end template Power, and acceptance(check);
Step 2: pouring several piece cast-in-situ box girder
1. shedding installs case beam steel and built-in fitting after prefabricating load, and acceptance(check);
2. pouring box beam bottom plate, web and top plate, qualified post-stress reinforcing bar is conserved;
3. removing falsework;
Step 3: installation stiff skeleton
Pacify respectively between (n+1) number block top plate and (n-1) number block top plate, between (n+1) number block bottom plate and (n-1) number block bottom plate Stiff skeleton is filled, and is fixed with frame bolt;
Step 4: installation n block template platform
1. the frame bolt lower end C of stiff skeleton installs n block template platform, that is, closure segment bottom plate mould on (n+1) number block bottom plate One end of plate platform, other end closure segment bottom plate platform are supported by Hanging Basket end template platform E;
2. passing through the pulling force tune of the frame bolt lower end C of stiff skeleton on two groups of Hanging Basket end template sunpenders and (n+1) number block bottom plate The absolute altitude of whole n block template platform meets design requirement, and the pulling force of frame bolt lower end C, which is less than, allows pulling force
Step 5: pouring n block box beam
1. installing n block reinforcing bar and built-in fitting, and acceptance(check);
2. selection good weather and temperature, casting concrete simultaneously conserve qualification;
3. removing n block template platform, continue lower step construction.
Compared with prior art, a kind of Wavelike steel webplate continuous bridge end bay of major design of the present invention closes up cast-in-place support Structure and construction method, the Wavelike steel webplate continuous bridge end bay close up cast-in-place support structure and have the following characteristics that one, end bay is existing It pours bracket and falsework is two systems being individually formed, removed after the completion of several piece cast-in-situ box girder mutually not dry when falsework Disturb the bearing capacity and stability for influencing cast-in-place support;Two, it is easy to operate to remove falsework, as long as removing what lateral connection was fixed Horizontal connection rod piece can be such that falsework separates;Three, Wavelike steel webplate suspended casting suspended basket end template sunpender, stiffness bone are efficiently used The frame bolt of frame supports or adjusts the absolute altitude of closure segment bottom plate platform, economizes on resources, easy to operate efficient.Therefore, this Kind Wavelike steel webplate continuous bridge end bay, which closes up cast-in-place support structure, has easy to operate efficient, safe and reliable, quality assurance etc. Advantage is avoided that the cast-in-situ box girder outermost end bottom part length Man Tangzhi for removing cast-in-place completion in conjunction with corresponding construction method Full framing collapse accident may occur for frame and falsework platform, also have the effect of energy-saving and emission-reduction, economic benefit and society Remarkable benefit.
Detailed description of the invention
Fig. 1 is schematic view of facade structure of the invention.
Fig. 2 is closure segment construction schematic diagram.
Fig. 3 is closure segment template system Force Calculation schema.
Specific embodiment
It will elaborate again by above-mentioned attached drawing to the embodiment of the present invention below.
As shown in Fig. 1 ~ Fig. 3,1. abutments, 2.(n-1) number block, 21.(n-1) number block top plate, 22.(n-1) number block bottom plate, 3. (n+1) number block, 31.(n+1) number block top plate, 32.(n+1) number block bottom plate, 4.n block, 5. cast-in-place supports, 6. falseworks, 61. Inserting paragraph, 62. horizontal connection rod pieces, 63. falsework platforms, 7. stiff skeletons, 71. stiff skeleton beams, 72. frame bolts, 8. the support of Hanging Basket system, 81. Hanging Baskets, 82. Hanging Basket end template platforms, 83. Hanging Basket end template sunpenders, 9.n block template platform.
Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method, as shown in Figure 1 and Figure 2, belongs to wave Shape steel web continuous bridge end bay closure construction field including abutment and rides upon expiring on solid ground at adjacent abutment 1 Hall bracket etc., the full framing are that the system being individually formed by cast-in-place support 5 and falsework 6 this two parts is constituted.
Wherein, cast-in-place support 5 is equipped with several piece cast-in-situ box girder, the i.e. cast-in-situ box girder of (n+1)~(n+5) number block, length Length than 1 outermost of abutment to (n+1)~(n+5) number block several piece cast-in-situ box girder least significant end is Δ=30cm~50cm short, the portion The load for dividing cast-in-place support 5 to be capable of independent bearing several piece cast-in-situ box girder, the cast-in-situ box girder of least significant end are (n+1) number block 4, wherein Δ =30cm~50cm is closure segment, that is, n block template platform inserting paragraph 61;The falsework 6 be inserting paragraph Δ=30cm~ 50cm length adds the total length of 63 length L of falsework platform, i.e. Δ+L, which is also full framing, and with it is existing Pouring the horizontal connection rod piece 62 of bracket 5, to make lateral connection secured, when removing falsework 6, would not influence cast-in-place support 5 by Power.
After the completion of the cast-in-place case of several piece is (n+1)~(n+5) numbers block beam construction at the abutment 1, the interim branch is removed Frame 6 is Δ+L, at this time bridge pier cantilever pouring adjacent thereto extend and at the cantilever boxgirder and abutment 1 that arrive several piece cast-in-situ box girder (n + 1) length between number block outermost end, i.e. n block 4 are closure segment;The closure segment, that is, n block 4, n block template platform 9 For n block, that is, closure segment template system, which bears the whole load of n block cast-in-situ box girder;And cantilever boxgirder is (n-1) number block 2, installs stiff skeleton 7 respectively in the top plate and bottom plate of (n-1) number block 2 and (n+1) number block 3, and with skeleton spiral shell Bolt 72 is fixed;(n+1) n block template platform 9 is installed in 72 lower end of frame bolt of stiff skeleton 7 on number block bottom plate 32, that is, closes up One end of section bottom plate platform, other end closure segment bottom plate platform are supported by Hanging Basket end template platform 82, the formation Closure segment bottom plate platform is used to support the web of closure segment and the template of top plate.
Meanwhile the cast-in-situ box girder is made of top plate and bottom plate and web, the top plate of 3 cast-in-situ box girder of (n+1) number block, bottom Plate is respectively (n+1) number block top plate 31, (n+1) number block bottom plate 32;(n-1) top plate and bottom plate of 2 cast-in-situ box girder of number block is respectively (n-1) number block top plate 21, (n-1) number block bottom plate 22.
The stiff skeleton 7 be steel components, construction closure segment, that is, n block template platform 9, reinforcing bar and concrete it Before, positioning need to be made and fixed, be fixed between (n+1) number block top plate 31 and (n-1) number block top plate 21 with frame bolt 72 respectively, (n + 1) between number block bottom plate 32 and (n-1) number block bottom plate 22, i.e., (n+1) number block 3 and (n-1) numbers (n+1) number block top plate 31 and (n-1) on number block top plate 21, on (n+1) number block bottom plate 32 and (n-1) number block bottom plate 22, and stiff skeleton beam 71 is formed.
The Hanging Basket system 8 is steel components, by Hanging Basket support 81, Hanging Basket end template platform 82 and two groups of Hanging Basket bed dies Plate sunpender 83 forms;The Hanging Basket support 81 is the walking mechanism of Hanging Basket system 8, and the movable pulley of Hanging Basket system 8 is by waveform steel The top braces of web and movement;Suspend Hanging Basket end template platform 82 in midair in two groups of 83 bottoms of Hanging Basket end template sunpender.
The closure segment, that is, n block 4 is longitudinally being variable section structure along bridge, in closure segment, that is, n block cast-in-situ box girder LoadUnder effect, the 72 lower end C of frame bolt of stiff skeleton 7 installs n block template on (n+1) number block bottom plate 32 Platform 9 is that one end stress of closure segment bottom plate platform is, other end closure segment bottom plate platform is by Hanging Basket end template It is supported at platform E, stress is, one end, that is, No. n of closure segment bottom plate platform is calculated by following equation as shown in Figure 3 9 stress of block template platformAnd structure safe coefficient:
Formula one,
Formula two,
Simultaneously, it is desirable that Hanging Basket end template platform 82 itself load of two groups of Hanging Basket end template sunpenders 83 in addition to bearing Hanging Basket system 8 Outside, closure segment i.e. 4 cast-in-situ box girder load action of n block is still suffered from;
Symbol definition in formula one and formula two are as follows:
--- the cast-in-situ box girder load of closure segment, that is, n block 4 and 2 joint of (n-1) number block,
--- the cast-in-situ box girder load of closure segment, that is, n block 4 and 3 joint of (n+1) number block,
--- the cast-in-situ box girder load of any point and 3 joint of (n+1) number block in closure segment, that is, n block 4,
--- any point and 3 joint of (n+1) number block are at a distance from starting point in closure segment, that is, n block 4,
--- closure segment, that is, 9 one end of n block template platform is anchored at the skeleton spiral shell of stiff skeleton 7 on (n+1) number block bottom plate 32 At a distance from 72 lower end C and n block of bolt, 4 joint,
--- closure segment, that is, n block 4 along bridge axial direction length,
--- closure segment, that is, n block 4 and 2 joint of (n-1) number block to 9 other end of n block template platform are anchored at Hanging Basket bottom The distance of E on template platform 82,
--- closure segment, that is, 9 one end of n block template platform is anchored at the skeleton spiral shell of stiff skeleton 7 on (n+1) number block bottom plate 32 The pulling force of 72 lower end C of bolt,
--- closure segment, that is, n block 4 and 2 joint of (n-1) number block to 9 other end of n block template platform are anchored at Hanging Basket bottom The support force at the end E on template platform 82,
--- closure segment, that is, 9 one end of n block template platform is anchored at the skeleton of stiff skeleton 7 on (n+1) number block bottom plate 32 72 lower end C's of bolt allows pulling force,
--- 6 allowable bearing of falsework,
Wavelike steel webplate continuous bridge end bay closes up the construction method of cast-in-place support structure, mainly includes the following steps:
Step 1: setting up cast-in-place support and falsework
1. compacting foundation is basic, joints cement concrete topping, it is desirable that be able to bear box-beam structure and cast-in-place support 5, interim branch The bearing capacity of frame 6;
2. length=several piece cast-in-situ box girder of cast-in-place support is (n+ by related standard criterion design cast-in-place support 5 and falsework 6 1)~(n+5) numbers block length-Δ (Δ=30cm~50cm), length=operating platform length L+ Δ (Δ=30cm of falsework 6 ~50cm);
3. setting up the cast-in-place support 5 and falsework 6 of independent architectonical respectively, then with horizontal connection rod piece 62 by cast-in-place support 5 It is secured with 6 lateral connection of falsework;
4. being laid with cast-in-situ box girder template;
5. 6 bearing capacity of falsework, which must be greater than, allows with concrete block precompressed cast-in-place support 5 and falsework 6 and end template Bearing capacity, and acceptance(check);
Step 2: pouring several piece cast-in-situ box girder
1. shedding installs case beam steel and built-in fitting after prefabricating load, and acceptance(check);
2. pouring box beam bottom plate, web and top plate, qualified post-stress reinforcing bar is conserved;
3. removing falsework 6;
Step 3: installation stiff skeleton
Between (n+1) number block top plate 32 and (n-1) number block top plate 21, (n+1) number block bottom plate 32 and (n-1) number block bottom plate 22 it Between stiff skeleton 7 is installed respectively, and it is fixed with frame bolt 72;
Step 4: installation n block template platform
1. 72 lower end C of the frame bolt installation n block template platform 9 of stiff skeleton 7 is closure segment on (n+1) number block bottom plate 32 One end of bottom plate platform, other end closure segment bottom plate platform are supported by Hanging Basket end template platform E;
2. passing through the 72 lower end C of frame bolt of stiff skeleton 7 on two groups of Hanging Basket end template sunpenders 83 and (n+1) number block bottom plate 32 The absolute altitude of pulling force adjustment n block template platform 9 meets design requirement, and the pulling force of 72 lower end C of frame bolt, which is less than, allows pulling force
Step 5: pouring n block box beam
1. installing 4 reinforcing bar of n block and built-in fitting, and acceptance(check);
2. selection good weather and temperature, casting concrete simultaneously conserve qualification;
3. removing n block template platform 9, continue lower step construction.
It is of the present invention that examples are only for illustrating the present invention and not for limiting the scope of the present invention.It should additionally manage Solution, after reading the content taught by the present invention, those skilled in the art can make various modifications or changes to the present invention, this In a little equivalent forms are also fallen within the scope of the appended claims of the present application.

Claims (8)

1. a kind of Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure, including abutment (1) and ride upon adjacent abutment (1) full framing on solid ground at, it is characterised in that the full framing is by cast-in-place support (5) and falsework (6) it constitutes;The cast-in-place support (5) is equipped with the several piece cast-in-situ box girder of (n+1)~(n+5) number block, the cast-in-place support (5) Length is Δ=30cm~50cm shorter than the length of abutment (1) outermost to the several piece cast-in-situ box girder least significant end, and independent bearing number The load of block cast-in-situ box girder, the cast-in-situ box girder of the least significant end are (n+1) number block (4);Δ=30cm~the 50cm is closure segment That is the inserting paragraph (61) of n block template platform (9);Falsework (6) length is Δ+L, is by inserting paragraph Δ=30cm ~50cm length adds the total length of falsework platform (63) length L, and the falsework (6) and cast-in-place support (5) are equipped with cross To the horizontal connection rod piece (62) being connected firmly, and remove the stress of falsework (6) without will affect cast-in-place support (5).
2. Wavelike steel webplate continuous bridge end bay according to claim 1 closes up cast-in-place support structure, it is characterised in that institute Closure segment i.e. n block is arranged in (n+1) number block least significant end of (n+1) stated~(n+5) number block several piece cast-in-situ box girder, with adjacent bridge Cantilever boxgirder (n-1) number block that pier cantilever pouring extends and arrives is connected, and in (n-1) number block (2) and (n+1) number block (3) It is installed respectively in top plate and bottom plate stiff skeleton (7), the stiff skeleton is fixed by frame bolt (72);Described number block bottom (n+1) N block template platform (9) are installed in frame bolt (72) lower end of stiff skeleton (7) on plate (32), i.e., closure segment bottom plate is flat One end of platform, other end closure segment bottom plate platform are supported by Hanging Basket end template platform (82), the closure segment bottom plate of the formation Template platform supports the web of closure segment and the template of top plate.
3. a kind of Wavelike steel webplate continuous bridge end bay according to claim 2 closes up cast-in-place support structure, feature exists In the closure segment, that is, n block (4) be longitudinally variable section structure along bridge, in closure segment, that is, n block cast-in-situ box girder loadUnder effect, frame bolt (72) the lower end C of stiff skeleton (7) installs n block mould on (n+1) number block bottom plate (32) Plate platform (9) i.e. one end stress of closure segment bottom plate platform is, other end closure segment bottom plate platform is by Hanging Basket bottom It is supported at template platform E, stress is, one end, that is, n block template of closure segment bottom plate platform is calculated by following equation Platform (9) stressAnd structure safe coefficient:
Formula one,
Formula two,
Simultaneously, it is desirable that two groups of Hanging Basket end template sunpenders (83) are in addition to bearing the Hanging Basket end template platform (82) of Hanging Basket system (8) certainly Outside body load, closure segment i.e. n block (4) cast-in-situ box girder load action is still suffered from;
Symbol definition in formula one and formula two are as follows:
--- the cast-in-situ box girder load of closure segment, that is, n block (4) and (n-1) number block (2) joint,
--- the cast-in-situ box girder load of closure segment, that is, n block (4) and (n+1) number block (3) joint,
--- the cast-in-situ box girder load of any point and (n+1) number block (3) joint in closure segment, that is, n block (4),
--- any point and (n+1) number block (3) joint are at a distance from starting point in closure segment, that is, n block (4),
--- closure segment, that is, n block template platform (9) one end is anchored at stiff skeleton (7) on (n+1) number block bottom plate (32) At a distance from frame bolt (72) lower end C and n block (4) joint,
--- closure segment, that is, n block (4) along bridge axial direction length,
--- closure segment, that is, n block (4) and (n-1) number block (2) joint to n block template platform (9) other end are anchored at extension The distance of E on basket end template platform (82),
--- closure segment, that is, n block template platform (9) one end is anchored at stiff skeleton (7) on (n+1) number block bottom plate (32) The pulling force of frame bolt (72) lower end C,
--- closure segment, that is, n block (4) is anchored at (n-1) number block (2) joint to n block template platform (9) other end The support force at the end E on Hanging Basket end template platform (82),
--- closure segment, that is, n block template platform (9) one end is anchored at stiff skeleton (7) on (n+1) number block bottom plate (32) Frame bolt (72) lower end C's allows pulling force,
--- falsework (6) allowable bearing,
4. Wavelike steel webplate continuous bridge end bay according to claim 3 closes up cast-in-place support structure, it is characterised in that institute The cast-in-situ box girder stated is made of top plate and bottom plate and web, and the top plate and bottom plate of (n+1) number block (3) cast-in-situ box girder is respectively (n+1) Number block top plate (31), (n+1) number block bottom plate (32);(n-1) top plate and bottom plate of number block (2) cast-in-situ box girder is respectively (n-1) number block Top plate (21), (n-1) number block bottom plate (22).
5. Wavelike steel webplate continuous bridge end bay according to claim 3 closes up cast-in-place support structure, it is characterised in that institute The stiff skeleton (7) stated is steel components, is determined before construction closure segment, that is, n block template platform (9), reinforcing bar and concrete Position is fixed, and is fixed between (n+1) number block top plate (31) and (n-1) number block top plate (21) with frame bolt (72) respectively, (n+ 1) between number block bottom plate (32) and (n-1) number block bottom plate (22).
6. Wavelike steel webplate continuous bridge end bay according to claim 3 closes up cast-in-place support structure, it is characterised in that institute The Hanging Basket system (8) stated is steel components, is hung by Hanging Basket support (81), Hanging Basket end template platform (82) and two groups of Hanging Basket end templates Bar (83) composition;The Hanging Basket support (81) is the walking mechanism of Hanging Basket system (8), and the movable pulley of Hanging Basket system (8) is by wave The top braces of shape steel web and movement;Suspend Hanging Basket end template platform in midair in two groups of Hanging Basket end template sunpender (83) bottoms (82).
7. Wavelike steel webplate continuous bridge end bay according to claim 3 closes up cast-in-place support structure, it is characterised in that institute The n block template platform (9) stated is n block (4) the i.e. template system of closure segment, which bears n block (4) cast-in-place case The whole load of beam.
8. the construction party that a kind of Wavelike steel webplate continuous bridge end bay according to claim 3 closes up cast-in-place support structure Method, it is characterised in that the construction method includes the following steps:
Step 1: setting up cast-in-place support and falsework
1. compacting foundation is basic, joints cement concrete topping, it is desirable that be able to bear box-beam structure and cast-in-place support (5), interim The bearing capacity of bracket (9);
2. by related standard criterion design cast-in-place support (5) and falsework (6), the cast-in-place case of length=several piece of cast-in-place support (5) Beam is (n+1)~(n+5) numbers block length-Δ (Δ=30cm~50cm), length=operating platform length L+ Δ of falsework (6) (Δ=30cm~50cm);
3. setting up the cast-in-place support (5) and falsework (6) of independent architectonical respectively, then will be cast-in-place with horizontal connection rod piece (62) Bracket (5) and falsework (6) lateral connection are secured;
4. being laid with cast-in-situ box girder template;
5. falsework (6) bearing capacity must be big with concrete block precompressed cast-in-place support (5) and falsework (6) and end template In allowable bearing, and acceptance(check);
Step 2: pouring several piece cast-in-situ box girder
1. shedding installs case beam steel and built-in fitting after prefabricating load, and acceptance(check);
2. pouring box beam bottom plate, web and top plate, qualified post-stress reinforcing bar is conserved;
3. removing falsework (6);
Step 3: installation stiff skeleton
Between (n+1) number block top plate (31) and (n-1) number block top plate (21), (n+1) number block bottom plate (32) and number block bottom (n-1) It is installed respectively between plate (21) stiff skeleton (7), and fixed with frame bolt (72);
Step 4: installation n block template platform
1. frame bolt (72) the lower end C of stiff skeleton (7) installs n block template platform (9) on (n+1) number block bottom plate (32) That is one end of closure segment bottom plate platform, other end closure segment bottom plate platform are supported by Hanging Basket end template platform E;
2. passing through the frame bolt of stiff skeleton (7) on two groups of Hanging Basket end template sunpenders (83) and (n+1) number block bottom plate (32) (72) absolute altitude of pulling force adjustment n block template platform (9) of lower end C meets design requirement, the pulling force of frame bolt (72) lower end C Less than allowing pulling force
Step 5: pouring n block box beam
1. installing n block (4) reinforcing bar and built-in fitting, and acceptance(check);
2. selection good weather and temperature, casting concrete simultaneously conserve qualification;
3. removing n block template platform (9), continue lower step construction.
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CN110939075A (en) * 2019-11-12 2020-03-31 中国铁建大桥工程局集团有限公司 Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam
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CN110184889A (en) * 2019-06-19 2019-08-30 苏交科集团股份有限公司 The composite bridge and its erection method of corrugated web receiving construction loads
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CN110939075A (en) * 2019-11-12 2020-03-31 中国铁建大桥工程局集团有限公司 Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam
CN110939075B (en) * 2019-11-12 2021-09-17 中国铁建大桥工程局集团有限公司 Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam
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