CN109704656A - A kind of bridge joint hillside fields polymer grouting strengthening method - Google Patents
A kind of bridge joint hillside fields polymer grouting strengthening method Download PDFInfo
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- CN109704656A CN109704656A CN201910017331.9A CN201910017331A CN109704656A CN 109704656 A CN109704656 A CN 109704656A CN 201910017331 A CN201910017331 A CN 201910017331A CN 109704656 A CN109704656 A CN 109704656A
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- grouting
- bridge joint
- hillside fields
- bridge
- geopolymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of bridge joint hillside fields polymer grouting strengthening methods, include the following steps: S1) arrangement hole position, and the borehole cleaning that drills；S2 Grouting Pipe) is buried, and prepares slurry；S3 4~8h) is conserved to base's grouting and reinforcing using early-strength geopolymer injecting paste material；S4) roadbed grouting and reinforcing is conserved 1~3 day using intumescent geopolymer.The present invention, which uses, has good physicochemical property intumescent geopolymer injecting paste material and early-strength geopolymer injecting paste material, it bankets to platform back and carries out depth delamination pour slurry reinforcing, the intensity and bearing capacity of roadbed after increase platform, improve and delay end of the bridge because of the vehicle bump of backfill earthwork sinking and soft soil roadbed settlement formation, so as to significantly improve the compactness on end of the bridge basis, bridge joint ramp road total bearing capacity is improved, has more wide application prospect in the disease management of bridge joint slope sedimentation.
Description
Technical field
The present invention relates to a kind of road grouting and reinforcing detection method more particularly to a kind of bridge joint hillside fields polymer grouting and reinforcings
Method.
Background technique
End of the bridge the earth base of road is partially soft, and by backfill soil compaction and end of the bridge effect of weight, end of the bridge sedimentation phenomenon is more serious, often
See that the main reason for sedimentation of bridge joint slope and Bridgehead-Jumping Disease occur includes: that end of the bridge Soft Ground is improper, and settlement after construction is inclined
Greatly；The packing quality of roadbed filling is not good enough, shallower to roadbed curing process depth, and it is relatively thin that controlling unit is compacted in work progress
It is weak, cause subgrade stiffness totally relatively low.
The currently used technique for delaying vehicle bump at bridge ends mainly has control backfill soil compaction, using foam concrete
Reduce the techniques such as bridgehead structures self weight.Improvement side due to the limitation of material self performance and construction technology, after bridging slope sedimentation
Formula and effect still have significant limitation.
Therefore handle platform back soft foundation well, broken structure sheaf is repaired, filling stage carries on the back the hole that soil matrix sedimentation generates
Gap is the important measures for controlling bumping at bridge-head.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of bridge joint hillside fields polymer grouting strengthening methods, can be significant
Improve the compactness on end of the bridge basis, improve bridge joint ramp road total bearing capacity, has more in the disease management of bridge joint slope sedimentation
Wide application prospect.
The present invention is to solve above-mentioned technical problem and the technical solution adopted is that provide a kind of polymer slip casting of bridge joint hillside fields
Reinforcement means includes the following steps: S1) arrangement hole position, and the borehole cleaning that drills；S2 Grouting Pipe) is buried, and prepares slurry；S3) using early
Strong type geopolymer injecting paste material is 0.3~1.0MPa to base's grouting and reinforcing, 0~1m of reinforcement depth, control grouting pressure, is supported
Protect 4~8h；S4) using intumescent geopolymer to roadbed grouting and reinforcing, 1~6m of reinforcement depth, controlling grouting pressure is
0.5~1.5Mpa is conserved 1~3 day.
Further, the step S1 uses quincunx mode arrangement hole position, and the pitch-row between adjacent hole location is 1~2m；
Drilling depth gos deep into 80~120cm of roadbed top surface or less.
Further, the step S1 arranges first row injected hole along access panel lip.
Further, early-strength geopolymer injecting paste material in the step S3, the percent mass proportioning of each component are as follows:
Metakaolin 36~48%, slag micropowder 22~28%, SILICA FUME 2~4%, sodium hydroxide 6~8%, sodium metasilicate 12~
18%, water-reducing agent 0.4~0.6% and water 12~18%；Intumescent geopolymer in the step S4, the matter of each component
It is as follows to measure per distribution ratio: slag micropowder 30~35%, flyash 32~38%, sodium metasilicate 12~18%, aluminium powder 0.2~
0.4%, water-reducing agent 0.2~0.5% and water 18~24%.
Further, it is S95 or S105 grades of blast-furnace cinder micro-powder that the slag micropowder, which is specific surface area,；The flyash
For the second class powered coal ash of 70% or more activity index；The metakaolin be 650~800 DEG C calcining after manufactured mesh number be 1200
The metakaolin of~1600 mesh；The mesh number of the SILICA FUME is 2000~3000；The water-reducing agent is polycarboxylate water-reducer, diminishing
Rate >=30%；The aluminium powder is the metallic aluminium powder of 30~50 mesh.
Further, the step S3 control early-strength geopolymer 4h compression strength is 5~20MPa, 28d resistance to compression
Intensity is 40~60MPa.
Further, the coefficient of cubical expansion of the step S4 control intumescent geopolymer is 1.1~1.5, note
Dry density is (1.2~1.6) * 10 after pulp material solidification3kg/m3, 1d compression strength be 5~10MPa, 28d compression strength be 15~
30MPa。
Further, further include following detecting step: S5: settling the label of point: being marked using sedimentation label steel nail
Note chooses the location arrangements settlement point away from end of the bridge different distance, each a certain number of settlement points of level height location arrangements；
S6: it monitors selecting for position: choosing a fixed observation position as monitoring site；S7: the periodic monitoring of settlement point absolute altitude:
Settlement observation is carried out using high-precision level, periodic monitoring records the absolute altitude of each settlement point, calculates the position roadbed subsidence
Situation；S8: grouting consolidation effect assessment: situation is settled according to the sedimentation point of periodic monitoring, grouting consolidation effect is divided
Analysis evaluation.
Further, the step S5 choose away from end of the bridge be respectively 5m, 15m, 25m distance location arrangements settlement point, often
2~10 settlement points of a level height location arrangements, all settlement points that the step S8 arranges each level height it is heavy
Drop data is averaged, the sedimentation situation as the level height position.
The present invention comparison prior art has following the utility model has the advantages that bridge joint hillside fields provided by the invention polymer grouting and reinforcing
Method, using intumescent geopolymer injecting paste material and early-strength geopolymer injecting paste material with good physicochemical property,
It bankets to platform back and carries out depth delamination pour slurry reinforcing, increase the intensity and bearing capacity of roadbed after platform, improve and delay end of the bridge because returning
The vehicle bump that earth fill sinks and soft soil roadbed settlement is formed improves so as to significantly improve the compactness on end of the bridge basis
Ramp road total bearing capacity is bridged, has more wide application prospect in the disease management of bridge joint slope sedimentation.
Detailed description of the invention
Fig. 1 is present invention bridge joint slope grouting and reinforcing arrangement of boring holes floor map；
Fig. 2 is present invention bridge joint slope grouting and reinforcing arrangement of boring holes diagrammatic cross-section；
Fig. 3 is present invention bridge joint slope slip casting observation point position view；
Fig. 4 is each point subsiding extent in present invention bridge joint slope and trend comparison diagram.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Bridge joint hillside fields provided by the invention polymer grouting strengthening method, includes the following steps:
S1) arrangement hole position, and the borehole cleaning that drills；
S2 Grouting Pipe) is buried, and prepares slurry；
S3) using early-strength geopolymer injecting paste material to base's grouting and reinforcing, 0~1m of reinforcement depth controls slip casting pressure
Power is 0.3~1.0MPa, conserves 4~8h；
S4) using intumescent geopolymer to roadbed grouting and reinforcing, 1~6m of reinforcement depth, controlling grouting pressure is
0.5~1.5MPa is conserved 1~3 day.
Bridge joint hillside fields provided by the invention polymer grouting strengthening method bankets to platform back and carries out depth delamination pour slurry and add
Gu shallow-layer is using early-strength geopolymer injecting paste material to base's grouting and reinforcing, lift structure layer intensity shortens curing time；
Deep layer carries out grouting and reinforcing to roadbed by compacted densification mode using intumescent geopolymer, and reinforcement depth reaches 1~
6m, control grouting pressure are 0.5~1.5MPa；To significantly improve the compactness on end of the bridge basis, it is whole to improve bridge joint ramp road
Bearing capacity improves and delays end of the bridge because of the vehicle bump of backfill earthwork sinking and soft soil roadbed settlement formation.
The formula for the intumescent geopolymer injecting paste material that the present invention uses, the slag comprising in mass ratio 30~35% are micro-
Powder, 32~38% flyash, 12~18% sodium metasilicate, 0.2~0.4% aluminium powder, 0.2~0.5% water-reducing agent and
18~24% water.
The formula of early-strength geopolymer for bridging slope base grouting and reinforcing of the invention, in mass ratio 36~
48% metakaolin, 22~28% slag micropowders, 2~4% SILICA FUMEs, 6~8% sodium hydroxides, 12~18% sodium metasilicates,
0.4~0.6% water-reducing agent and 12~18% water.
It is provided by the invention bridge joint hillside fields polymer grouting and reinforcing matching operation method, process flow be arrangement of boring holes →
Drilling borehole cleaning → bury Grouting Pipe → slurry mixing → early-strength geopolymer injecting paste material to base's grouting and reinforcing → 4~8h of maintenance
→ intumescent geopolymer is to roadbed grouting and reinforcing → open to traffic of maintenance 1 day.
The matching operation method of bridge joint hillside fields polymer grouting and reinforcing provided by the invention, arrangement of boring holes use quincunx side
Formula plane is laid, and adjacent hole location pitch-row is 1~2m.Referring to Figure 1, drilling depth should go deep into undisturbed soil dirt road base top surface or less 80
~120cm, 1 side of bridge are equipped with guardrail 3, and bridging the black real point in slope 2 is roadbed grouting and reinforcing hole, and hollow white point is base's slip casting
Reinforced hole, vertical section schematic diagram are as shown in Figure 2.
The recruitment evaluation detection method of bridge joint hillside fields polymer grouting and reinforcing of the invention comprising the steps of:
Step S5: it settles the label of point: being illustrated in fig. 3 shown below along bridge joint slope, be marked, selected using sedimentation label steel nail
Take be respectively away from end of the bridge 5m, 15m, 25m distance location arrangements settlement point, each level height location arrangements 2~10 sedimentation
Point.
Step S6: it monitors selecting for position: choosing a fixed observation position as monitoring site, as shown in Figure 3；
Step S7: settlement observation, periodic monitoring record the periodic monitoring of settlement point absolute altitude: are carried out using high-precision level
The absolute altitude of each settlement point calculates the position roadbed subsidence situation；
Step S8: grouting consolidation effect assessment: situation is settled according to the sedimentation point of periodic monitoring, to grouting consolidation effect
It is analyzed and evaluated.
A kind of intumescent geopolymer injecting paste material for bridging slope subgrade strengthening provided by the invention has preferable
Mechanical property, the higher coefficient of expansion and lower dry density, a kind of early-strength geopolymer injecting paste material tool of basic reinforcement
There are a higher early strength and shorter curing time, two kinds of materials all have good later period mechanical property and fabulous durable
Property.Matched bridge joint slope grouting and reinforcing construction technology can be using different types of geopolymer targetedly respectively to bridge
Jie Po base and roadbed are reinforced, and are reinforced platform and are carried on the back soft foundation, repair broken structure sheaf.Corresponding slip casting effect assessment inspection
Survey method can effective periodic detection bridge joint slope subsiding extent and trend.
Below by taking Zhejiang Huzhou project as an example, project bridge joint slope has track, pit-hole, differential settlement, end of the bridge
The diseases such as vehicle are jumped, surface layer generation is mainly transmitted in traffic loading, subgrade deformation and sedimentation due to pavement structure.The project
Hillside fields polymer grouting strengthening method is connect using the bridge joint Ramp bridge in the present invention and carries out repairing and reinforcement.
The formula of the intumescent geopolymer injecting paste material of subgrade strengthening, comprising in mass ratio 30% slag micropowder,
35% flyash, 12.5% sodium metasilicate, 0.3% aluminium powder, 0.2% water-reducing agent and 22% water.Performance indicator is such as
Under:
| Fluidity | The coefficient of expansion | Dry density | 1d intensity | 3d intensity | 28d intensity |
| 18s | 1.4 | 1.28*103kg/m3 | 6.5MPa | 16.5MPa | 24.8MPa |
The formula of the early-strength geopolymer injecting paste material of basic reinforcement, including 40% metakaolin of mass ratio, 22% mine
Slag micro mist, 3% SILICA FUME, 6% sodium hydroxide, 13.5% sodium metasilicate, 0.5% water-reducing agent and 15% water.Performance indicator
As follows (h is hour, and d is day):
| Fluidity | 4h intensity | 1d intensity | 3d intensity | 28d intensity |
| 15s | 8.5kg/m3 | 27.5MPa | 38.2MPa | 56.4MPa |
Construction technology process: arrangement of boring holes → drilling borehole cleaning → buries Grouting Pipe → slurry mixing → early-strength geopolymer note
Pulp material is to base's grouting and reinforcing → maintenance 6h → intumescent geopolymer to open after roadbed grouting and reinforcing → maintenance 1 day
Traffic.
Parameters of construction technology: in order to guarantee that grout distribution juxtaposition formation one is whole in the slip casting region of this secondary requirement
Quincunx mode cloth hole is taken in the intensity of body, every lane, and injected hole is away from 2m, array pitch 2m.When roadbed slip casting, by deep it is shallow continuously into
Row delamination pour slurry.
Grouting consolidation effect assessment monitoring: using sedimentation label steel nail be marked, choose away from end of the bridge be respectively 5m, 15m,
The location arrangements settlement point of 25m distance, 2 settlement points of each level height location arrangements.It is high-precision using the smooth DSZ1 type in Suzhou one
It spends level and carries out settlement observation, precision 0.1mm, every kilometer round trip measures height difference standard deviation≤0.7mm.And it is normal to choose opposite side
The bridge joint slope for advising process, monitors its subsiding extent and compares.Carry out within every 3 months a subsiding extent test, monitoring knot
Fruit is as follows:
The present invention bridges each point subsiding extent in slope and trend comparison diagram as shown in figure 4, the broken line above in Fig. 4 is bridge north
Side Subsidence trend line, broken line below are bridge southern side Subsidence trend line.Hangzhoupro Chang Qiaodong half range north and south two is compared by periodic monitoring
Side bridges slope and settles situation, analyzes comparison to data it is found that carrying out the bridge joint slope of grouting and reinforcing using the technology of the present invention, slip casting adds
Gu the subsiding extent after 3 months and after half a year is significantly less than the bridge joint slope of common process processing.
Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill
Art personnel, without departing from the spirit and scope of the present invention, when can make a little modification and perfect therefore of the invention protection model
It encloses to work as and subject to the definition of the claims.
Claims (9)
1. a kind of bridge joint hillside fields polymer grouting strengthening method, which comprises the steps of:
S1) arrangement hole position, and the borehole cleaning that drills；
S2 Grouting Pipe) is buried, and prepares slurry；
S3) using early-strength geopolymer injecting paste material to base's grouting and reinforcing, 0~1m of reinforcement depth, controlling grouting pressure is
0.3~1.0MPa conserves 4~8h；
S4) using intumescent geopolymer to roadbed grouting and reinforcing, 1~6m of reinforcement depth, control grouting pressure is 0.5~
1.5MPa is conserved 1~3 day.
2. bridge joint hillside fields polymer grouting strengthening method as described in claim 1, which is characterized in that the step S1 uses plum
Flower-shape mode arrangement hole position, the pitch-row between adjacent hole location are 1~2m；Drilling depth gos deep into 80~120cm of roadbed top surface or less.
3. bridge joint hillside fields polymer grouting strengthening method as claimed in claim 2, which is characterized in that the step S1 is along attachment strap
First row injected hole is arranged at edge.
4. bridge joint hillside fields polymer grouting strengthening method as described in claim 1, which is characterized in that early strong in the step S3
Type geopolymer injecting paste material, the percent mass proportioning of each component are as follows: metakaolin 36~48%, slag micropowder 22~
28%, SILICA FUME 2~4%, sodium hydroxide 6~8%, sodium metasilicate 12~18%, water-reducing agent 0.4~0.6% and water 12~
18%；Intumescent geopolymer in the step S4, the percent mass proportioning of each component are as follows: slag micropowder 30~
35%, flyash 32~38%, sodium metasilicate 12~18%, aluminium powder 0.2~0.4%, water-reducing agent 0.2~0.5% and water 18~
24%.
5. as claimed in claim 4 bridge joint hillside fields polymer grouting strengthening method, which is characterized in that the slag micropowder be than
The blast-furnace cinder micro-powder that surface area is S95 or S105 grades；The flyash is the second class powered coal ash of 70% or more activity index；Institute
State metakaolin be 650~800 DEG C calcining after manufactured mesh number be 1200~1600 mesh metakaolin；The mesh of the SILICA FUME
Number is 2000~3000；The water-reducing agent is polycarboxylate water-reducer, water-reducing rate >=30%；The aluminium powder is the metal of 30~50 mesh
Aluminium powder.
6. bridge joint hillside fields polymer grouting strengthening method as claimed in claim 4, which is characterized in that the step S3 control is early
Strong type geopolymer 4h compression strength is 5~20MPa, and 28d compression strength is 40~60MPa.
7. bridge joint hillside fields polymer grouting strengthening method as described in claim 1, which is characterized in that the step S4 control is swollen
The coefficient of cubical expansion of swollen type geopolymer is 1.1~1.5, and dry density is (1.2~1.6) * after injecting paste material solidification
103kg/m3, 1d compression strength is 5~10MPa, and 28d compression strength is 15~30MPa.
8. bridge joint hillside fields polymer grouting strengthening method as described in claim 1, which is characterized in that further include following detection step
It is rapid:
S5: it settles the label of point: being marked using sedimentation label steel nail, it is heavy to choose the location arrangements away from end of the bridge different distance
Point, each a certain number of settlement points of level height location arrangements drop；
S6: it monitors selecting for position: choosing a fixed observation position as monitoring site；
S7: the periodic monitoring of settlement point absolute altitude: settlement observation is carried out using high-precision level, periodic monitoring records each sedimentation
The absolute altitude of point, calculates the position roadbed subsidence situation；
S8: grouting consolidation effect assessment: situation is settled according to the sedimentation point of periodic monitoring, grouting consolidation effect is analyzed
Evaluation.
9. bridge joint hillside fields polymer grouting strengthening method as claimed in claim 8, which is characterized in that the step S5 choose away from
End of the bridge is respectively the location arrangements settlement point of 5m, 15m, 25m distance, 2~10 settlement points of each level height location arrangements, institute
It states step S8 to be averaged the settling data for all settlement points that each level height is arranged, as the level height position
Settle situation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017331.9A CN109704656A (en) | 2019-01-08 | 2019-01-08 | A kind of bridge joint hillside fields polymer grouting strengthening method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017331.9A CN109704656A (en) | 2019-01-08 | 2019-01-08 | A kind of bridge joint hillside fields polymer grouting strengthening method |
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| CN109704656A true CN109704656A (en) | 2019-05-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627168A (en) * | 2020-12-23 | 2021-04-09 | 河南长安交通科技发展有限公司 | High-density polymer grouting reinforcement method for roadbed at sunken part of bridge and culvert butt strap |
| CN113430885A (en) * | 2021-06-29 | 2021-09-24 | 中交路桥建设有限公司 | Grouting construction method for bridge head butt strap for reconstruction and extension of expressway |
| CN114111710A (en) * | 2021-11-26 | 2022-03-01 | 山东大学 | Intelligent monitoring and accurate positioning method for full-section differential settlement at road and bridge junction |
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| CN101967794A (en) * | 2010-09-18 | 2011-02-09 | 余闯 | New technology for treating vehicle bump at bridge ends |
| CN107601988A (en) * | 2017-10-11 | 2018-01-19 | 上海力阳道路加固科技股份有限公司 | A kind of microdilatancy cracking resistance super hardening two-component geopolymer injecting paste material |
| CN108546016A (en) * | 2018-05-15 | 2018-09-18 | 上海力阳道路加固科技股份有限公司 | A kind of balloon type geopolymer of road grouting and reinforcing |
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2019
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| CN101967794A (en) * | 2010-09-18 | 2011-02-09 | 余闯 | New technology for treating vehicle bump at bridge ends |
| CN107601988A (en) * | 2017-10-11 | 2018-01-19 | 上海力阳道路加固科技股份有限公司 | A kind of microdilatancy cracking resistance super hardening two-component geopolymer injecting paste material |
| CN108546016A (en) * | 2018-05-15 | 2018-09-18 | 上海力阳道路加固科技股份有限公司 | A kind of balloon type geopolymer of road grouting and reinforcing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627168A (en) * | 2020-12-23 | 2021-04-09 | 河南长安交通科技发展有限公司 | High-density polymer grouting reinforcement method for roadbed at sunken part of bridge and culvert butt strap |
| CN113430885A (en) * | 2021-06-29 | 2021-09-24 | 中交路桥建设有限公司 | Grouting construction method for bridge head butt strap for reconstruction and extension of expressway |
| CN114111710A (en) * | 2021-11-26 | 2022-03-01 | 山东大学 | Intelligent monitoring and accurate positioning method for full-section differential settlement at road and bridge junction |
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