CN108842592A - 200 metre hole road box beams of one kind and its segmentation casting method - Google Patents

200 metre hole road box beams of one kind and its segmentation casting method Download PDF

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Publication number
CN108842592A
CN108842592A CN201810590550.1A CN201810590550A CN108842592A CN 108842592 A CN108842592 A CN 108842592A CN 201810590550 A CN201810590550 A CN 201810590550A CN 108842592 A CN108842592 A CN 108842592A
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China
Prior art keywords
web
pours
pouring
template
entrance
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CN201810590550.1A
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Chinese (zh)
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CN108842592B (en
Inventor
尹景燕
安秀山
张长财
刘俊
翟永贞
吴浩
王祾
付培培
刘泳志
宋亮
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中交航局第工程有限公司
中交一航局第一工程有限公司
中交第航务工程局有限公司
中交第一航务工程局有限公司
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/04Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
    • 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

Abstract

The present invention is 200 metre hole road box beams of one kind and its segmentation casting method, including end template, and the cross section of the end template is four across three chambers, and 200 metre hole road box beam is segmented the step of pouring and is:1. being segmented, choose and be located in the middle web on the box beam length direction, 200 metre hole road box beams is segmented at 1m before the web, respectively leading portion and back segment;2. leading portion pours, including bottom slab concreting, web pour, conserve and section processing;3. back segment pours;4. top plate pours.The present invention has carried out segmentation pouring construction to box beam, the side's amount for being segmented after-pouring is respectively 1100 sides and 1300 sides, the time that single pours is 17 hours, avoid the time zone of temperature exceeding standard, it ensure that being normally carried out for concreting, the position of segmentation and the processing of section part can reduce segmentation to the stress globality of box-beam structure, reduce anaphase bridge area load to the influence at crossstructure seam.

Description

200 metre hole road box beams of one kind and its segmentation casting method

Technical field

The present invention relates to technical field of bridge engineering, more particularly to a kind of 200 metre hole road box beams and its segmentation casting method.

Background technique

Commonly used cast-in-situ box girder structure is the bridge box and beam structure within 150m, and the country mostly uses single span single-unit prefabricated The structure of installation, being influenced by region limitation, prefabricated fabricating yard limitation etc. due to, can use cast-in-situ box girder structure, Cast-in-situ box girder is also the structure applied to science of bridge building, especially in the case where place is limited or complex environment, the cast-in-place case in the duct 200m The use of beam will be more and more.

Due to the special weather condition in Middle East, requirement of the high temperature and humidity for cast-in-place quality is especially high, especially in the summer Season construction, according to code requirement, ambient air temperature is forbidden to carry out pouring for concrete when being higher than 40 DEG C.For box beam bottom plate and web Total side amount be 2400 sides, if primary concreting, the conventional speed of perfusion of 80 sides need to be poured 30 hours on an hourly basis, for the summer Be lower than daily in season 40 DEG C time be no more than 18 hours, large volume box beam concrete can not be completed to pour in 18 hours, therefore, A kind of new method is needed to meet the requirement.

Summary of the invention

Present invention seek to address that the deficiencies in the prior art, and 200 metre hole road box beams of one kind and its segmentation casting method are provided.

The present invention to achieve the above object, using following technical scheme:A kind of 200 metre hole road box beams, which is characterized in that packet Include end template, the cross section of the end template is four across three chamber structures, is equipped with horizontal the among the end template at chamber One is open, and the two sides of chamber are equipped with one group of girder steel that is vertical and being parallel to each other among the end template, and the end template is transversal It is open that it is equipped with horizontal second at two chambers on the outside of face, is equipped with one group on the outside of two chambers on the outside of the end template It is parallel to each other and girder steel that upper end is inclined outwardly, the inside of girder steel described in every group, which passes through buckle card, wooden frame, the wooden frame Surface, which is followed closely, bamboo slab rubber, and the cavity in the bamboo slab rubber on the inside of every group of vertically arranged girder steel is that the first web pours Entrance, the cavity in the bamboo slab rubber on the inside of every group of girder steel being inclined outwardly are that the second web pours entrance, the bottom Support frame has been built in the chamber of template, and top template, the end template length have been built on support frame as described above and the end template Vertical web is equipped among direction at 100 meters, also is provided with several webs between the web and the box beam both ends.

A kind of the step of 200 metre hole road box beams segmentation casting method, the segmentation of 200 metre hole road box beam pours, is as follows:

1. being segmented

It is analyzed according to box beam overall structure, obtains box beam M curve, the integrally-built analysis method of box beam is Known method, which is not described herein again, chooses and is located in the middle web on the box beam length direction, before the web at 1m pair 200 metre hole road box beams are segmented, respectively leading portion and back segment, before the web among the box beam at 1m box beam by Torque it is small, which, which can reduce, is segmented influence to box-beam structure stress globality;

2. leading portion pours

A, bottom slab concreting

With pump truck the first web of end template pours entrance, the second web pours entrance, first open and second is open Locate while carrying out pouring for bottom plate, pouring for first open-mouth is to be poured from the described first two open sides to centre, institute Stating pouring for the second open-mouth is by pouring and slowly being shifted to close to described the pouring inlet close to second web One web pours inlet, carries out cooling and with the pump that vibrates to pouring to the bottom plate poured using spray cooling device when pouring The concrete built vibrates;

B, web pours

Need to carry out placement layer by layer when pouring the web, every layer concrete is vibrated after pouring with the pump that vibrates, and coagulation is discharged Gas in soil;

Inlet first, which is poured, in second web carries out pouring for the first layer concrete, after the completion of pouring, described second Web pours first layer concrete in entrance and carries out predry, and pump truck is drawn to first web and pours inlet, pumps Vehicle, which pours inlet to first web, to carry out first layer concrete and pours, after the completion of pouring, first web First layer concrete poured in entrance carries out predry, and then second web pours inlet and carries out second layer coagulation Soil pour, after the completion of pouring, second web pour second layer concrete in entrance carry out predry, described first Web pours inlet and carries out pouring for second layer concrete, is successively repeated and pours, until being poured into top, pours When be all made of spray cooling device and cool down to the web;

C, it conserves

Bottom plate and web after pouring to leading portion conserve, and curing time is 7-10 days;

D, section is handled

Cleaning is carried out to the section part for pouring segmentation after maintenance and dabbing is handled, reduces bridge floor load and pontic is segmented Pour the influence of seam crossing;

3. back segment pours

Box beam back segment is poured, including bottom slab concreting, web are poured and conserved, process with step 2. in a, b and c;

4. top plate pours

After the completion of the leading portion and back segment of the box beam pour, support frame, institute are built in the chamber of the end template It states and builds top template on support frame and the end template, then carry out top plate in top template and pour, spray drop is used when pouring Warm device cools down to the top plate, and after the completion of top plate pours, top board surface covered protection layer is spilt using bridge bottom water tank Water curing, curing time are 7-10 days, avoid the surface shrinking cracks generated by the temperature difference or strong wind.

Particularly, the step 2. in the web carry out placement layer by layer when, every layer pours with a thickness of 45cm or less.

Particularly, the step 2. with the step 3. in the bottom plate and the web are poured when be all made of three Platform pump truck.

Particularly, the step 4. in water pot be 3000 gallons of water pots.

Particularly, the step 4. in protective layer be by the piece of sack contacted with top board surface and the piece of sack surface The protective layer of the plastic cloth composition of covering.

The beneficial effects of the invention are as follows:The present invention has carried out segmentation pouring construction to box beam, is segmented side's amount point of after-pouring Not Wei 1100 sides and 1300 sides, the time that single pours be 17 hours, avoid the time zone of temperature exceeding standard, ensure that coagulation What soil poured is normally carried out, and the position of segmentation and the processing of section part can reduce the stress globality being segmented to box-beam structure, Reduce anaphase bridge area load to the influence at crossstructure seam.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of box beam longitudinal direction in the present invention;

Fig. 2 is the partial enlarged view of A in Fig. 2;

The cross-sectional view of box beam when Fig. 3 is bottom slab concreting of the present invention;

Fig. 4 is the cross-sectional view of box beam when web of the present invention pours;

In figure:1- box beam M curve;2- leading portion;3- back segment;4- wooden frame;5- bamboo slab rubber;6- girder steel;The second web of 7- pours Build entrance;8- second is open;The first web of 9- pours entrance;10- first is open;The first layer concrete of 11-;The 12- second layer is mixed Solidifying soil;

It is described in detail below with reference to the embodiment of the present invention referring to attached drawing.

Specific embodiment

Present invention will be further explained below with reference to the attached drawings and examples:

As Figure 1-Figure 4, a kind of 200 metre hole road box beams, which is characterized in that including end template, the cross of the end template Section is four across three chamber structures, is equipped with the first horizontal opening 10 among the end template at chamber, among the end template The two sides of chamber are equipped with one group of girder steel 6 that is vertical and being parallel to each other, equal at two chambers on the outside of the end template cross section One group is equipped on the outside of two chambers equipped with the second horizontal opening 8, on the outside of the end template to be parallel to each other and upper end is outside Inclined girder steel 6, the inside of girder steel 6 described in every group, which passes through buckle card, wooden frame 4, and the surface of the wooden frame 4, which is followed closely, bamboo glue Plate 5, the cavity in the bamboo slab rubber 5 of every group of 6 inside of the vertically arranged girder steel are that the first web pours entrance 9, every group Cavity in the bamboo slab rubber 5 for 6 inside of the girder steel being inclined outwardly is that the second web pours entrance 7, the end template Support frame has been built in chamber, has built top template on support frame as described above and the end template, in the end template length direction Between vertical web is equipped at 100 meters, also be provided with several webs between the web and the box beam both ends.

A kind of the step of segmentation casting method of 200 metre hole road box beam, the segmentation of 200 metre hole road box beam pours, is as follows:

1. being segmented

It is analyzed according to box beam overall structure, obtains box beam M curve 1, the integrally-built analysis method of box beam is Known method, which is not described herein again, chooses and is located in the middle web on the box beam length direction, before the web at 1m pair 200 metre hole road box beams are segmented, respectively leading portion 2 and back segment 3, before the web among the box beam at 1m box beam by The torque arrived is small, which can reduce the influence being segmented to box-beam structure stress globality;

2. leading portion pours

A, bottom slab concreting

Entrance 9 is poured in the first web of end template with pump truck, the second web pours the 7, first opening 10 and second of entrance Carry out pouring for bottom plate simultaneously at opening 8, pouring at first opening 10 be from two sides of first opening 10 in Between pour, pouring at second opening 8 is by pouring and slowly shifting to pouring at entrance 7 close to second web It pours at entrance 9 close to first web, is cooled down simultaneously using spray cooling device to the bottom plate poured when pouring With vibrating, pump vibrates to the concrete poured;

B, web pours

Need to carry out placement layer by layer when pouring the web, every layer concrete is vibrated after pouring with the pump that vibrates, and coagulation is discharged Gas in soil;

It is first poured in second web and carries out first layer concrete 11 at entrance 7 and pour, after the completion of pouring, described the Two webs pour first layer concrete 11 in entrance 7 and carry out predry, and pump truck is drawn to first web and pours entrance 9 Place, pump truck pours first web and carries out pouring for first layer concrete 11 at entrance 9, described after the completion of pouring First web pour first layer concrete 11 in entrance 9 carry out predry, then second web pour at entrance 7 into The second layer concrete of row 12 pours, and after the completion of pouring, second web pours second layer concrete 12 in entrance 7 Predry is carried out, first web, which pours, carries out pouring for second layer concrete 12 at entrance 9, be successively repeated and pour It builds, until being poured into top, spray cooling device is all made of when pouring and is cooled down to the web;

C, it conserves

Bottom plate and web after pouring to leading portion conserve, and curing time is 7-10 days;

D, section is handled

Cleaning is carried out to the section part for pouring segmentation after maintenance and dabbing is handled, reduces bridge floor load and pontic is segmented Pour the influence of seam crossing;

3. back segment pours

Box beam back segment 3 is poured, including bottom slab concreting, web are poured and conserved, process with step 2. in a, b and c;

4. top plate pours

After the completion of the leading portion 2 and back segment 3 of the box beam pour, support frame is built in the chamber of the end template, Top template is built on support frame as described above and the end template, then top plate is carried out in top template and pours, using spraying when pouring Cooling device cools down to the top plate, and after the completion of top plate pours, top board surface covered protection layer is carried out using bridge bottom water tank Sprinkling maintenance, curing time are 7-10 days, avoid the surface shrinking cracks generated by the temperature difference or strong wind.

Particularly, the step 2. in the web carry out placement layer by layer when, every layer pours with a thickness of 45cm or less.

Particularly, the step 2. with the step 3. in the bottom plate and the web are poured when be all made of three Platform pump truck.

Particularly, the step 4. in water pot be 3000 gallons of water pots.

Particularly, the step 4. in protective layer be by the piece of sack contacted with top board surface and the piece of sack surface The protective layer of the plastic cloth composition of covering.

Embodiment one

A kind of 200 metre hole road box beams, which is characterized in that including end template, the cross section of the end template is four across three casees Cell structure is equipped with the first horizontal opening 10 at chamber among the end template, and the two sides of chamber are all provided among the end template There is one group of girder steel 6 that is vertical and being parallel to each other, is equipped with horizontal second at two chambers on the outside of the end template cross section Opening 8 is equipped with one group on the outside of the end template and is parallel to each other and girder steel 6 that upper end is inclined outwardly, often on the outside of two chambers The inside of the group girder steel 6, which passes through buckle card, wooden frame 4, and the surface of the wooden frame 4, which is followed closely, bamboo slab rubber 5, and every group vertically sets Cavity in the bamboo slab rubber 5 for the inside of the girder steel 6 set is that the first web pours entrance 9, every group be inclined outwardly it is described Cavity in the bamboo slab rubber 5 of 6 inside of girder steel is that the second web pours entrance 7, has built branch in the chamber of the end template Top template has been built on support, support frame as described above and the end template, has been equipped at 100 meters of the end template length direction centre perpendicular To web, also be provided with several webs between the web and the box beam both ends.

A kind of the step of segmentation casting method of 200 metre hole road box beam, the segmentation of 200 metre hole road box beam pours, is as follows:

1. being segmented

It is analyzed according to box beam overall structure, obtains box beam M curve 1, it is upper to choose the box beam length direction In intermediate web, 200 metre hole road box beams are segmented at 1m before the web, respectively leading portion 2 and back segment 3, described The torque that box beam is subject at 1m before the web among box beam is small, and it is whole to box-beam structure stress which can reduce segmentation The influence of body;

2. leading portion pours

A, bottom slab concreting

Entrance 9 is poured in the first web of end template with pump truck, the second web pours the 7, first opening 10 and second of entrance Carry out pouring for bottom plate simultaneously at opening 8, pouring at first opening 10 be from two sides of first opening 10 in Between pour, pouring at second opening 8 is by pouring and slowly shifting to pouring at entrance 7 close to second web It pours at entrance 9 close to first web, is cooled down simultaneously using spray cooling device to the bottom plate poured when pouring With vibrating, pump vibrates to the concrete poured;

B, web pours

Need to carry out placement layer by layer when pouring the web, every layer concrete is vibrated after pouring with the pump that vibrates, and coagulation is discharged Gas in soil;

It is first poured in second web and carries out first layer concrete 11 at entrance 7 and pour, after the completion of pouring, described the Two webs pour first layer concrete 11 in entrance 7 and carry out predry, and pump truck is drawn to first web and pours entrance 9 Place, pump truck pours first web and carries out pouring for first layer concrete 11 at entrance 9, described after the completion of pouring First web pour first layer concrete 11 in entrance 9 carry out predry, then second web pour at entrance 7 into The second layer concrete of row 12 pours, and after the completion of pouring, second web pours second layer concrete 12 in entrance 7 Predry is carried out, first web, which pours, carries out pouring for second layer concrete 12 at entrance 9, be successively repeated and pour It builds, until being poured into top, spray cooling device is all made of when pouring and is cooled down to the web;

C, it conserves

Bottom plate and web after pouring to leading portion conserve, and curing time is 7 days;

D, section is handled

Cleaning is carried out to the section part for pouring segmentation after maintenance and dabbing is handled, reduces bridge floor load and pontic is segmented Pour the influence of seam crossing;

3. back segment pours

Box beam back segment 3 is poured, including bottom slab concreting, web are poured and conserved, process with step 2. in a, b and c;

4. top plate pours

After the completion of the leading portion 2 and back segment 3 of the box beam pour, support frame is built in the chamber of the end template, Top template is built on support frame as described above and the end template, then top plate is carried out in top template and pours, using spraying when pouring Cooling device cools down to the top plate, and after the completion of top plate pours, top board surface covered protection layer is carried out using bridge bottom water tank Sprinkling maintenance, curing time are 7 days, avoid the surface shrinking cracks generated by the temperature difference or strong wind.

Particularly, the step 2. in the web carry out placement layer by layer when, every layer pours with a thickness of 30cm.

Particularly, the step 2. with the step 3. in the bottom plate and the web are poured when be all made of three Platform pump truck.

Particularly, the step 4. in water pot be 3000 gallons of water pots.

Particularly, the step 4. in protective layer be by the piece of sack contacted with top board surface and the piece of sack surface The protective layer of the plastic cloth composition of covering.

Embodiment two

A kind of 200 metre hole road box beams, which is characterized in that including end template, the cross section of the end template is four across three casees Cell structure is equipped with the first horizontal opening 10 at chamber among the end template, and the two sides of chamber are all provided among the end template There is one group of girder steel 6 that is vertical and being parallel to each other, is equipped with horizontal second at two chambers on the outside of the end template cross section Opening 8 is equipped with one group on the outside of the end template and is parallel to each other and girder steel 6 that upper end is inclined outwardly, often on the outside of two chambers The inside of the group girder steel 6, which passes through buckle card, wooden frame 4, and the surface of the wooden frame 4, which is followed closely, bamboo slab rubber 5, and every group vertically sets Cavity in the bamboo slab rubber 5 for the inside of the girder steel 6 set is that the first web pours entrance 9, every group be inclined outwardly it is described Cavity in the bamboo slab rubber 5 of 6 inside of girder steel is that the second web pours entrance 7, has built branch in the chamber of the end template Top template has been built on support, support frame as described above and the end template, has been equipped at 100 meters of the end template length direction centre perpendicular To web, also be provided with several webs between the web and the box beam both ends.

A kind of the step of segmentation casting method of 200 metre hole road box beam, the segmentation of 200 metre hole road box beam pours, is as follows:

1. being segmented

It is analyzed according to box beam overall structure, obtains box beam M curve 1, it is upper to choose the box beam length direction In intermediate web, 200 metre hole road box beams are segmented at 1m before the web, respectively leading portion 2 and back segment 3, described The torque that box beam is subject at 1m before the web among box beam is small, and it is whole to box-beam structure stress which can reduce segmentation The influence of body;

2. leading portion pours

A, bottom slab concreting

Entrance 9 is poured in the first web of end template with pump truck, the second web pours the 7, first opening 10 and second of entrance Carry out pouring for bottom plate simultaneously at opening 8, pouring at first opening 10 be from two sides of first opening 10 in Between pour, pouring at second opening 8 is by pouring and slowly shifting to pouring at entrance 7 close to second web It pours at entrance 9 close to first web, is cooled down simultaneously using spray cooling device to the bottom plate poured when pouring With vibrating, pump vibrates to the concrete poured;

B, web pours

Need to carry out placement layer by layer when pouring the web, every layer concrete is vibrated after pouring with the pump that vibrates, and coagulation is discharged Gas in soil;

It is first poured in second web and carries out first layer concrete 11 at entrance 7 and pour, after the completion of pouring, described the Two webs pour first layer concrete 11 in entrance 7 and carry out predry, and pump truck is drawn to first web and pours entrance 9 Place, pump truck pours first web and carries out pouring for first layer concrete 11 at entrance 9, described after the completion of pouring First web pour first layer concrete 11 in entrance 9 carry out predry, then second web pour at entrance 7 into The second layer concrete of row 12 pours, and after the completion of pouring, second web pours second layer concrete 12 in entrance 7 Predry is carried out, first web, which pours, carries out pouring for second layer concrete 12 at entrance 9, be successively repeated and pour It builds, until being poured into top, spray cooling device is all made of when pouring and is cooled down to the web;

C, it conserves

Bottom plate and web after pouring to leading portion conserve, and curing time is 10 days;

D, section is handled

Cleaning is carried out to the section part for pouring segmentation after maintenance and dabbing is handled, reduces bridge floor load and pontic is segmented Pour the influence of seam crossing;

3. back segment pours

Box beam back segment 3 is poured, including bottom slab concreting, web are poured and conserved, process with step 2. in a, b and c;

4. top plate pours

After the completion of the leading portion 2 and back segment 3 of the box beam pour, support frame is built in the chamber of the end template, Top template is built on support frame as described above and the end template, then top plate is carried out in top template and pours, using spraying when pouring Cooling device cools down to the top plate, and after the completion of top plate pours, top board surface covered protection layer is carried out using bridge bottom water tank Sprinkling maintenance, curing time are 10 days, avoid the surface shrinking cracks generated by the temperature difference or strong wind.

Particularly, the step 2. in the web carry out placement layer by layer when, every layer pours with a thickness of 45cm.

Particularly, the step 2. with the step 3. in the bottom plate and the web are poured when be all made of three Platform pump truck.

Particularly, the step 4. in water pot be 3000 gallons of water pots.

Particularly, the step 4. in protective layer be by the piece of sack contacted with top board surface and the piece of sack surface The protective layer of the plastic cloth composition of covering.

Embodiment three

A kind of 200 metre hole road box beams, which is characterized in that including end template, the cross section of the end template is four across three casees Cell structure is equipped with the first horizontal opening 10 at chamber among the end template, and the two sides of chamber are all provided among the end template There is one group of girder steel 6 that is vertical and being parallel to each other, is equipped with horizontal second at two chambers on the outside of the end template cross section Opening 8 is equipped with one group on the outside of the end template and is parallel to each other and girder steel 6 that upper end is inclined outwardly, often on the outside of two chambers The inside of the group girder steel 6, which passes through buckle card, wooden frame 4, and the surface of the wooden frame 4, which is followed closely, bamboo slab rubber 5, and every group vertically sets Cavity in the bamboo slab rubber 5 for the inside of the girder steel 6 set is that the first web pours entrance 9, every group be inclined outwardly it is described Cavity in the bamboo slab rubber 5 of 6 inside of girder steel is that the second web pours entrance 7, has built branch in the chamber of the end template Top template has been built on support, support frame as described above and the end template, has been equipped at 100 meters of the end template length direction centre perpendicular To web, also be provided with several webs between the web and the box beam both ends.

A kind of the step of segmentation casting method of 200 metre hole road box beam, the segmentation of 200 metre hole road box beam pours, is as follows:

1. being segmented

It is analyzed according to box beam overall structure, obtains box beam M curve 1, it is upper to choose the box beam length direction In intermediate web, 200 metre hole road box beams are segmented at 1m before the web, respectively leading portion 2 and back segment 3, described The torque that box beam is subject at 1m before the web among box beam is small, and it is whole to box-beam structure stress which can reduce segmentation The influence of body;

2. leading portion pours

A, bottom slab concreting

Entrance 9 is poured in the first web of end template with pump truck, the second web pours the 7, first opening 10 and second of entrance Carry out pouring for bottom plate simultaneously at opening 8, pouring at first opening 10 be from two sides of first opening 10 in Between pour, pouring at second opening 8 is by pouring and slowly shifting to pouring at entrance 7 close to second web It pours at entrance 9 close to first web, is cooled down simultaneously using spray cooling device to the bottom plate poured when pouring With vibrating, pump vibrates to the concrete poured;

B, web pours

Need to carry out placement layer by layer when pouring the web, every layer concrete is vibrated after pouring with the pump that vibrates, and coagulation is discharged Gas in soil;

It is first poured in second web and carries out first layer concrete 11 at entrance 7 and pour, after the completion of pouring, described the Two webs pour first layer concrete 11 in entrance 7 and carry out predry, and pump truck is drawn to first web and pours entrance 9 Place, pump truck pours first web and carries out pouring for first layer concrete 11 at entrance 9, described after the completion of pouring First web pour first layer concrete 11 in entrance 9 carry out predry, then second web pour at entrance 7 into The second layer concrete of row 12 pours, and after the completion of pouring, second web pours second layer concrete 12 in entrance 7 Predry is carried out, first web, which pours, carries out pouring for second layer concrete 12 at entrance 9, be successively repeated and pour It builds, until being poured into top, spray cooling device is all made of when pouring and is cooled down to the web;

C, it conserves

Bottom plate and web after pouring to leading portion conserve, and curing time is 8 days;

D, section is handled

Cleaning is carried out to the section part for pouring segmentation after maintenance and dabbing is handled, reduces bridge floor load and pontic is segmented Pour the influence of seam crossing;

3. back segment pours

Box beam back segment 3 is poured, including bottom slab concreting, web are poured and conserved, process with step 2. in a, b and c;

4. top plate pours

After the completion of the leading portion 2 and back segment 3 of the box beam pour, support frame is built in the chamber of the end template, Top template is built on support frame as described above and the end template, then top plate is carried out in top template and pours, using spraying when pouring Cooling device cools down to the top plate, and after the completion of top plate pours, top board surface covered protection layer is carried out using bridge bottom water tank Sprinkling maintenance, curing time are 8 days, avoid the surface shrinking cracks generated by the temperature difference or strong wind.

Particularly, the step 2. in the web carry out placement layer by layer when, every layer pours with a thickness of 40cm.

Particularly, the step 2. with the step 3. in the bottom plate and the web are poured when be all made of three Platform pump truck.

Particularly, the step 4. in water pot be 3000 gallons of water pots.

Particularly, the step 4. in protective layer be by the piece of sack contacted with top board surface and the piece of sack surface The protective layer of the plastic cloth composition of covering.

The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way Limitation, as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved direct application It is within the scope of the present invention in other occasions.

Claims (6)

1. a kind of 200 metre hole road box beams, which is characterized in that including end template, the cross section of the end template is four across three chambers Structure, is equipped with that horizontal first is open (10) among the end template at chamber, the two sides of chamber are all provided among the end template There is one group of girder steel (6) that is vertical and being parallel to each other, horizontal the is equipped at two chambers on the outside of the end template cross section Two open (8) are equipped with one group on the outside of the end template and are parallel to each other and girder steel that upper end is inclined outwardly on the outside of two chambers (6), the inside of girder steel described in every group (6) passes through buckle card and has wooden frame (4), and the surface of the wooden frame (4), which is followed closely, bamboo slab rubber (5), the cavity in the bamboo slab rubber (5) on the inside of every group of vertically arranged girder steel (6) is that the first web pours entrance (9), the cavity in the bamboo slab rubber (5) on the inside of every group of girder steel (6) being inclined outwardly is that the second web pours entrance (7), support frame has been built in the chamber of the end template, has built top template on support frame as described above and the end template, it is described Vertical web is equipped among end template length direction at 100 meters, also is provided between the web and the box beam both ends several Web.
2. the segmentation casting method of 200 metre hole road box beams according to claim 1, which is characterized in that 200 metre hole road case The step of beam segmentation pours is as follows:
1. being segmented
It is analyzed according to box beam overall structure, obtains box beam M curve (1), chosen and be located on the box beam length direction Intermediate web, is segmented 200 metre hole road box beams at 1m before the web, respectively leading portion (2) and back segment (3);
2. leading portion pours
A, bottom slab concreting
With pump truck the first web of end template pours entrance (9), the second web pours entrance (7), first open (10) and the Pouring for bottom plate is carried out at two open (8) simultaneously, pouring at described first open (10) is by described first open (10) Two sides are poured to centre, and pouring at described second open (8) is by pouring pouring at entrance (7) close to second web It builds and slowly shifts to and pour at entrance (9) close to first web, using spray cooling device to described in pouring when pouring Bottom plate carries out cooling and is vibrated with the pump that vibrates to the concrete poured;
B, web pours
Need to carry out placement layer by layer when pouring the web, every layer concrete is vibrated after pouring with the pump that vibrates;
It is first poured in second web and carries out the first layer concrete (11) at entrance (7) and pour, after the completion of pouring, described the Two webs pour first layer concrete (11) in entrance (7) and carry out predry, and pump truck is drawn to first web and is poured At entrance (9), pump truck pours progress first layer concrete (11) at entrance (9) to first web and pours, and pours After the completion, first web pours first layer concrete (11) in entrance (9) and carries out predry, then second abdomen Plate, which pours, carries out pouring for the second layer concrete (12) at entrance (7), after the completion of pouring, second web pours entrance (7) In second layer concrete (12) carry out predry, first web, which pours, carries out the second layer coagulation at entrance (9) Pouring for native (12), is successively repeated and pours, until being poured into top, spray cooling device is all made of when pouring to the abdomen Plate cools down;
C, it conserves
Bottom plate and web after pouring to leading portion conserve, and curing time is 7-10 days;
D, section is handled
Cleaning is carried out to the section part for pouring segmentation after maintenance and dabbing is handled;
3. back segment pours
Box beam back segment (3) is poured, including bottom slab concreting, web are poured and conserved, process with step 2. in a, b and c;
4. top plate pours
After the completion of the leading portion (2) and back segment (3) of the box beam pour, support frame is built in the chamber of the end template, Top template is built on support frame as described above and the end template, then top plate is carried out in top template and pours, using spraying when pouring Cooling device cools down to the top plate, and after the completion of top plate pours, top board surface covered protection layer is carried out using bridge bottom water tank Sprinkling maintenance, curing time are 7-10 days.
3. the segmentation casting method of 200 metre hole road box beams according to claim 2, which is characterized in that the step 2. in it is right When the web carries out placement layer by layer, every layer is poured with a thickness of 45cm or less.
2. and institute 4. the segmentation casting method of 200 metre hole road box beams according to claim 3, which is characterized in that the step State step 3. in be all made of three pump trucks when pouring to the bottom plate and the web.
5. the segmentation casting method of 200 metre hole road box beams according to claim 4, which is characterized in that the step 4. in Water pot is 3000 gallons of water pots.
6. the segmentation casting method of 200 metre hole road box beams according to claim 5, which is characterized in that the step 4. in Protective layer is the protective layer that the plastic cloth covered by the piece of sack contacted with top board surface and the piece of sack surface forms.
CN201810590550.1A 2018-06-09 2018-06-09 200-meter-pore box girder pouring template and segmented pouring method using template CN108842592B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000017883A (en) * 1999-12-27 2000-04-06 김근택 Incremental launching method type pc box girder bridge making mold system and segment making method thereof
CN103437286A (en) * 2013-07-16 2013-12-11 中铁十三局集团第五工程有限公司 Full-span box girder segmental prefabricating method applied to bridge construction
CN105714684A (en) * 2016-02-24 2016-06-29 中国一冶集团有限公司 Prestressed concrete variable cross-section fish-bellied type continuous box girder construction method
CN205839568U (en) * 2016-07-04 2016-12-28 中国三冶集团有限公司 A kind of cast-in-situ box girder model sheetinstallat structure
CN108098979A (en) * 2017-12-13 2018-06-01 中国铁建大桥工程局集团有限公司 A kind of PK sections concrete box girder precast segment template

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000017883A (en) * 1999-12-27 2000-04-06 김근택 Incremental launching method type pc box girder bridge making mold system and segment making method thereof
CN103437286A (en) * 2013-07-16 2013-12-11 中铁十三局集团第五工程有限公司 Full-span box girder segmental prefabricating method applied to bridge construction
CN105714684A (en) * 2016-02-24 2016-06-29 中国一冶集团有限公司 Prestressed concrete variable cross-section fish-bellied type continuous box girder construction method
CN205839568U (en) * 2016-07-04 2016-12-28 中国三冶集团有限公司 A kind of cast-in-situ box girder model sheetinstallat structure
CN108098979A (en) * 2017-12-13 2018-06-01 中国铁建大桥工程局集团有限公司 A kind of PK sections concrete box girder precast segment template

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