CN108677738A - A kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method - Google Patents
A kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method Download PDFInfo
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- CN108677738A CN108677738A CN201810783697.2A CN201810783697A CN108677738A CN 108677738 A CN108677738 A CN 108677738A CN 201810783697 A CN201810783697 A CN 201810783697A CN 108677738 A CN108677738 A CN 108677738A
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- China
- Prior art keywords
- mud jacking
- case beam
- prefabricated case
- opening
- channel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention belongs to bridge precast beam technical field of construction, specifically a kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method solves the problems such as single hole prestress hole path pressure grouting pressure is discontented, and construction efficiency is low, complicated for operation.It is provided with the track vertical with prefabricated case beam axis in precast beam field, has pneumatic mortar machine, each prestressed pore passage of prefabricated case beam to connect on track, first stock inlet mud jacking, then mud jacking overfall mud jacking.Mud jacking of the present invention is once completed, and grouting result is high-quality, and construction efficiency is high, safe, good in economic efficiency.
Description
Technical field
The invention belongs to bridge precast beam technical field of construction, specifically a kind of prefabricated case beam prestressed pore passage series connection mud jacking
Construction method.
Background technology
With the fast development of high-speed railway and highway, to save the construction period, precast beam application of construction technology is wide
General use.The mud jacking construction of original prefabricated case beam duct uses single hole prestress hole path pressure grouting, and construction efficiency is low, and hole path pressure grouting
Effect is poor.Because of a kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method of the invention, prefabricated case beam duct mud jacking is improved
Construction quality improves precast beam construction efficiency.
Invention content
For the present invention in order to solve present in the mud jacking construction of prefabricated case beam duct, single hole prestress hole path pressure grouting pressure is discontented,
Construction efficiency is low, it is complicated for operation the problems such as, propose a kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method.
The present invention adopts the following technical scheme that realization：A kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method,
1）, the prefabricated case beam precast beam field in each prefabricated case beam both ends on the outside of be provided with it is vertical with prefabricated case beam axis
Track, having on track can be provided on the prefabricated case beam pedestal on the outside of the pneumatic mortar machine of its movement, each prefabricated case beam both ends
Pneumatic mortar machine fixed mechanism；
Each prestressed pore passage of the prefabricated case beam is connected, below prefabricated case beam one end a opening of the channel be mud jacking into
Mouth is starched, an opening of the channel above prefabricated case beam is exhaust outlet, is also mud jacking overfall, passes through pipe between opening of the channel and opening of the channel
Road connector connection, pipe jointer includes the joint steel pipe of intermediate rubber tube and both ends, and the outer end of joint steel pipe is equipped with
For being connect with opening of the channel or pneumatic mortar machine, the inner end of two joint steel pipes connects and divides with the both ends of rubber tube respectively thread
Tightening nut is not configured with it；Control switch is respectively equipped on two joint steel pipes；
Stock inlet is set to the same side of each prefabricated case beam, and mud jacking overfall is also disposed on the same side of each prefabricated case beam, mud jacking
Machine is moved to the precast box beam-ends of required mud jacking and is fixed with prefabricated case beam pedestal, and stock inlet is connected with pneumatic mortar machine；
2）, open the control switches of all connectors, mud jacking starts, and forms mud jacking series via；
3）, when mud jacking overfall overflows underflow, close the control switch of the pipe jointer at mud jacking overfall, continue mud jacking 3-
10 seconds；
4）, close stock inlet at pipe jointer control switch and pneumatic mortar machine, and with pneumatic mortar machine disconnection, mud jacking overfall with
Pneumatic mortar machine connects, and the control switch for opening the pipe jointer at mud jacking overfall carries out mud jacking, holding 5- after pressure stabilisation
10 seconds, close the control switch and pneumatic mortar machine；
5）And step 4）Mud jacking terminates to be separated by 20-30 minutes, unloads all pipe jointers, all ducts are blocked, and completes pressure
Slurry.
Further, the first to the tenth prestressed pore passage is arranged in the prefabricated case beam from bottom to top, wherein first and
Two, the third and fourth, the 5th and the six, the 7th and the eight, the 9th and the tenth respectively in the center line both sides of box beam and positioned at same
One horizontal line, prefabricated case beam one end have the first, second to the tenth opening of the channel, the prefabricated case beam other end to have first, second to the tenth
Opening of the channel；The second of prefabricated case beam one end is connected with the 4th opening of the channel, and third is connected with the 5th opening of the channel, and the 6th and octal road
Mouth is connected, and the 7th is connected with the 9th opening of the channel；First and second opening of the channels of the prefabricated case beam other end are connected, the third and fourth hole
Road junction is connected, and the 5th is connected with the 6th opening of the channel, and the 7th is connected with octal road junction, and the 9th is connected with the tenth opening of the channel, the end
The first opening of the channel be stock inlet, the tenth opening of the channel is at mud jacking overfall, stock inlet and mud jacking overfall are located at prefabricated case beam
Axis both sides.
The invention has the advantages that：The processing of prestressed pore passage connector is simple, each prestressed pore passage series connection side of precast beam
Just, mud jacking is once completed, and grouting result is high-quality, and construction efficiency is high, safe, good in economic efficiency.Using existing examination
Proved recipe method carries out contrast test, and the full rate of mud jacking of existing single hole prestress hole path pressure grouting method is 80%-82%, mud jacking time
For every beam 6-8 hours, and the full rate of the mud jacking of the method for the invention was 97-99%, and the mud jacking time is every beam 3-4 hours.
Description of the drawings
Fig. 1 is prefabricated case beam side of the present invention duct connection diagram,
Fig. 2 is the prefabricated case beam other side of the present invention duct connection diagram,
Fig. 3 is the structural schematic diagram of pipe jointer of the present invention,
Fig. 4 is prefabricated case beam beam field mud jacking system schematic,
In figure：1- stock inlets, 2- mud jacking overfalls, 3- pipe jointers, 3.1- rubber tubes, 3.2- joint steel pipes, 3.3- are screwed
Nut, 3.4- control switches, 3.5- threads, 4- prefabricated case beams, 5- pneumatic mortar machines, 6- tracks, 7- pneumatic mortar machine fixed mechanisms.
Specific implementation mode
The specific implementation mode of the present invention is described further in conjunction with attached drawing.
Prefabricated case beam prestressed pore passage series connection mud jacking construction method of the present invention, in order to improve prestressing force prefabricated case beam
Mud jacking construction efficiency ensures hole path pressure grouting construction quality.
Prefabricated case beam prestressed pore passage series connection mud jacking construction method of the present invention, including：The prefabricated case beam
It is provided with the track vertical with prefabricated case beam axis on the outside of the both ends of each prefabricated case beam in precast beam field, having on track can be with respect to it
Mobile pneumatic mortar machine is provided with pneumatic mortar machine fixed mechanism on the prefabricated case beam pedestal on the outside of each prefabricated case beam both ends；The pressure
Pulp grinder fixed mechanism is existing fast joint structure.
Each prestressed pore passage of the prefabricated case beam is connected, and below prefabricated case beam one end a opening of the channel is mud jacking
Stock inlet, an opening of the channel above prefabricated case beam is exhaust outlet, is also mud jacking overfall, is led between opening of the channel and opening of the channel
Piping connector is connected to, and pipe jointer includes the joint steel pipe of intermediate rubber tube and both ends, the outer end of joint steel pipe
It is used to connect with opening of the channel or pneumatic mortar machine equipped with thread, the inner end of two joint steel pipes is connected with the both ends of rubber tube respectively
And it is configured with tightening nut respectively；Control switch is respectively equipped on two joint steel pipes；
Stock inlet is set to the same side of each prefabricated case beam, and mud jacking overfall is also disposed on the same side of each prefabricated case beam, mud jacking
Machine is moved to the precast box beam-ends of required mud jacking and is fixed with prefabricated case beam pedestal.
The first to the tenth prestressed pore passage is arranged in the prefabricated case beam from bottom to top, wherein first and second, third and
Four, the 5th and the six, the 7th and the eight, the 9th and the tenth respectively the center line both sides of box beam and be located at same horizontal line,
Prefabricated case beam one end has the first, second to the tenth opening of the channel, the prefabricated case beam other end to have the first, second to the tenth opening of the channel；In advance
The second of box beam one end processed is connected with the 4th opening of the channel, and third is connected with the 5th opening of the channel, and the 6th is connected with octal road junction, the
Seven are connected with the 9th opening of the channel；First and second opening of the channels of the prefabricated case beam other end are connected, and the third and fourth opening of the channel is connected,
5th is connected with the 6th opening of the channel, and the 7th is connected with octal road junction, and the 9th is connected with the tenth opening of the channel, first duct at the end
Mouth is stock inlet, the tenth opening of the channel is at mud jacking overfall, and stock inlet and mud jacking overfall are located at prefabricated case beam axis both sides.
Prefabricated case beam prestressed pore passage series connection mud jacking construction method of the present invention, is as follows：
1, the preparation before mud jacking
Steel strand wires are cut：After tension of prestressed tendon anchoring, extra steel strand wires are cut with abrasive machine, anchor is stretched out in steel strand wires end
Have 30~50mm, forbids to be cut with arc welding.
Sealing off and covering anchorage：Gap between anchorage and steel strand wires, is clogged with cement mortar, so as not to grout and lose grouting pressure, but to protect
The gas vent for demonstrate,proving anchorage mud jacking hole is unimpeded.
Rinse duct：Pressure flush of water is used in duct before mud jacking, with sundries such as slags in evacuation aperture, ensures that duct is unimpeded, punching
After washing hole internal water accumulation, then timely mud jacking are blown out with the compressed air of not oil-containing.During mud jacking, water is emitted as found to have, leak
Phenomenon will stop up a loophole in time.When find have string hole phenomenon, and it is not disposable when, should distinguish string hole number, it is several in mud jacking
In hole simultaneously pressure injection.
2, the mixing of cement mortar
Cement mortar mix-design intensity is 50MPa, and match ratio is determined by laboratory, and all cement ages are no more than one month,
Mixing and stirring for cement mortar should add water in mixer first, place into cement.After fully mixing and stirring, admixture is added.It adds
Moisture in material should be included in the ratio of mud.It mixes and stirs and is not less than 2min, grout mixer rotating speed is more than 1000 turns per minute, to ensure slurry
Mixing quality, until reaching uniform consistency.
3, mud jacking
1）, stock inlet is connected with pneumatic mortar machine；
2）, open the control switches of all connectors, mud jacking starts, and forms mud jacking series via；
3）, when mud jacking overfall overflows underflow, close the control switch of the pipe jointer at mud jacking overfall, continue mud jacking 3-
10 seconds；
4）, close stock inlet at pipe jointer control switch and pneumatic mortar machine, and with pneumatic mortar machine disconnection, mud jacking overfall with
Pneumatic mortar machine connects, and the control switch for opening the pipe jointer at mud jacking overfall carries out mud jacking, holding 5- after pressure stabilisation
10 seconds, close the control switch and pneumatic mortar machine；
5）And step 4）Mud jacking terminates to be separated by 20-30 minutes, unloads all pipe jointers, all ducts are blocked, and completes pressure
Slurry.
In addition, pipeline pneumatic mortar carries out after the completion of prestress wire tensioning immediately as far as possible, mud jacking uses vacuum grouting
Technique should be vacuumized first before mud jacking, make the vacustat in duct between -0.06MPa~-0.10MPa, very
After reciprocal of duty cycle is stablized, pipeline pneumatic mortar end valve door is opened immediately, while opening mudjack and carrying out continuous mud jacking, and pipeline should be full of cement
Slurry.Cement mortar should be stirred often during using preceding and pressure injection, and slurries are completed to the perdurabgility in indentation duct not from mixing
More than 40min, the pressure of mud jacking is preferably 0.5~0.7MPa, and it is full and in exhaust that mud jacking fullness degree should reach the duct other end
Until hole is discharged with the same slurry of regulation fluidity.
Each shift should leave and take no less than 3 groups of samples（Every group is three 70.7mm × 70.7mm × 70.7mm cubes
Test specimen）Standard Curing 28d checks evaluating basis of its compression strength as cement mortar quality.
Press the pipeline completely starched that should be protected, not vibrated in one day, cement mortar is after the implantation in 48h in pipeline, knot
Structure concrete temperature must not be less than 5 DEG C, otherwise should take Insulation.Temperature of the cement mortar in grout mixer is no more than 25
DEG C, when day temperature is higher than 35 DEG C, mud jacking is changed to night progress.Two days after mud jacking, the water of injection end and venthole is checked
The closely knit situation of mud, is handled when needing.
Need that there is complete mud jacking to record after the completion of mud jacking, including mud jacking date, the ratio of mud and the admixture of each pipeline,
Mud jacking pressure, intensity of test block etc..
4, it blocks
Beam-ends cement mortar is rinsed well immediately after hole path pressure grouting, the steel strand wires of 30mm, extra use are stayed outside anchor clipper
Abrasive cutoff saw is cut away, and encapsulates anchorage and stretching notch using pea gravel concreten, it is desirable that vibration compacting.Remove backing plate, anchorage and beam
The dirt of end face concrete.According to design requirement banded end bar-mat reinforcement, fixed sealing end template checks beam body overall length, then cast is mixed
Solidifying soil.Sealing end concrete strength meets design requirement.
Claims (2)
- The mud jacking construction method 1. a kind of prefabricated case beam prestressed pore passage is connected, it is characterised in that：1）, the prefabricated case beam precast beam field in each prefabricated case beam both ends on the outside of be provided with it is vertical with prefabricated case beam axis Track, having on track can be provided on the prefabricated case beam pedestal on the outside of the pneumatic mortar machine of its movement, each prefabricated case beam both ends Pneumatic mortar machine fixed mechanism；Each prestressed pore passage of the prefabricated case beam is connected, below prefabricated case beam one end a opening of the channel be mud jacking into Mouth is starched, an opening of the channel above prefabricated case beam is exhaust outlet, is also mud jacking overfall, passes through pipe between opening of the channel and opening of the channel Road connector connection, pipe jointer includes the joint steel pipe of intermediate rubber tube and both ends, and the outer end of joint steel pipe is equipped with For being connect with opening of the channel or pneumatic mortar machine, the inner end of two joint steel pipes connects and divides with the both ends of rubber tube respectively thread Tightening nut is not configured with it；Control switch is respectively equipped on two joint steel pipes；Stock inlet is set to the same side of each prefabricated case beam, and mud jacking overfall is also disposed on the same side of each prefabricated case beam, mud jacking Machine is moved to the precast box beam-ends of required mud jacking and is fixed with prefabricated case beam pedestal, and stock inlet is connected with pneumatic mortar machine；2）, open the control switches of all connectors, mud jacking starts, and forms mud jacking series via；3）, when mud jacking overfall overflows underflow, close the control switch of the pipe jointer at mud jacking overfall, continue mud jacking 3- 10 seconds；4）, close stock inlet at pipe jointer control switch and pneumatic mortar machine, and with pneumatic mortar machine disconnection, mud jacking overfall with Pneumatic mortar machine connects, and the control switch for opening the pipe jointer at mud jacking overfall carries out mud jacking, holding 5- after pressure stabilisation 10 seconds, close the control switch and pneumatic mortar machine；5）And step 4）Mud jacking terminates to be separated by 20-30 minutes, unloads all pipe jointers, all ducts are blocked, and completes pressure Slurry.
- The mud jacking construction method 2. prefabricated case beam prestressed pore passage according to claim 1 is connected, it is characterised in that：Described The first to the tenth prestressed pore passage is arranged in prefabricated case beam from bottom to top, wherein the first and second, third and fourth, the 5th and Six, the 7th and the eight, the 9th and the tenth respectively in the center line both sides of box beam and positioned at same horizontal line, and prefabricated case beam one end has First, second to the tenth opening of the channel, the prefabricated case beam other end have the first, second to the tenth opening of the channel；The of prefabricated case beam one end Two are connected with the 4th opening of the channel, and third is connected with the 5th opening of the channel, and the 6th is connected with octal road junction, the 7th and the 9th opening of the channel It is connected；First and second opening of the channels of the prefabricated case beam other end are connected, and the third and fourth opening of the channel is connected, the 5th and the 6th duct Mouthful it is connected, the 7th is connected with octal road junction, and the 9th is connected with the tenth opening of the channel, and first opening of the channel at the end is stock inlet, the Ten opening of the channels are at mud jacking overfall, and stock inlet and mud jacking overfall are located at prefabricated case beam axis both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810783697.2A CN108677738A (en) | 2018-07-17 | 2018-07-17 | A kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810783697.2A CN108677738A (en) | 2018-07-17 | 2018-07-17 | A kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method |
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| CN108677738A true CN108677738A (en) | 2018-10-19 |
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| CN201810783697.2A Pending CN108677738A (en) | 2018-07-17 | 2018-07-17 | A kind of prefabricated case beam prestressed pore passage series connection mud jacking construction method |
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Citations (7)
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| CN101538859A (en) * | 2009-04-23 | 2009-09-23 | 中国华西企业有限公司 | Controllable method for grouting holes in building engineering |
| KR20090130798A (en) * | 2008-06-16 | 2009-12-24 | (주)씨디텍엔지니어링 | Temporary bridge construction system using a steel pipe structure |
| CN103603273A (en) * | 2013-11-04 | 2014-02-26 | 沈阳市政集团有限公司 | Method for grouting construction of prestressed pipe |
| CN103711316A (en) * | 2013-12-17 | 2014-04-09 | 柳州黔桥工程材料有限公司 | Control method of intelligent pulping and grouting system |
| CN105002826A (en) * | 2015-06-30 | 2015-10-28 | 中铁二十三局集团有限公司 | Intelligent mud jacking system for magnetic levitation track beam |
| CN105345926A (en) * | 2015-09-25 | 2016-02-24 | 安徽水利开发股份有限公司 | Prefabricated construction method for prestressed concrete box girder |
| CN107675888A (en) * | 2017-09-22 | 2018-02-09 | 中国建筑土木建设有限公司 | Circulate mud jacking system and its circulation mud jacking method |
-
2018
- 2018-07-17 CN CN201810783697.2A patent/CN108677738A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090130798A (en) * | 2008-06-16 | 2009-12-24 | (주)씨디텍엔지니어링 | Temporary bridge construction system using a steel pipe structure |
| CN101538859A (en) * | 2009-04-23 | 2009-09-23 | 中国华西企业有限公司 | Controllable method for grouting holes in building engineering |
| CN103603273A (en) * | 2013-11-04 | 2014-02-26 | 沈阳市政集团有限公司 | Method for grouting construction of prestressed pipe |
| CN103711316A (en) * | 2013-12-17 | 2014-04-09 | 柳州黔桥工程材料有限公司 | Control method of intelligent pulping and grouting system |
| CN105002826A (en) * | 2015-06-30 | 2015-10-28 | 中铁二十三局集团有限公司 | Intelligent mud jacking system for magnetic levitation track beam |
| CN105345926A (en) * | 2015-09-25 | 2016-02-24 | 安徽水利开发股份有限公司 | Prefabricated construction method for prestressed concrete box girder |
| CN107675888A (en) * | 2017-09-22 | 2018-02-09 | 中国建筑土木建设有限公司 | Circulate mud jacking system and its circulation mud jacking method |
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