CN107059536A - A kind of new-to-old concrete interface bar planting adhesive method - Google Patents
A kind of new-to-old concrete interface bar planting adhesive method Download PDFInfo
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- CN107059536A CN107059536A CN201710280953.1A CN201710280953A CN107059536A CN 107059536 A CN107059536 A CN 107059536A CN 201710280953 A CN201710280953 A CN 201710280953A CN 107059536 A CN107059536 A CN 107059536A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/06—Methods of making joints
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Abstract
The invention discloses a kind of new-to-old concrete interface bar planting adhesive method, comprise the following steps：(1) base material concrete quality is checked：The base material concrete surface for being not less than C20 to strength grade carries out dabbing processing；(2) the base material concrete after dabbing processing is carried out to surface and carries out bar planting construction：Snap the line positioning, drilling, borehole cleaning, injecting glue, bar planting, inspect for acceptance；(3) novel concrete is poured.This method is reasonably optimized by parameters such as the relations to the distance at the distance between two neighboring bar planting center, the anchorage depth of bar planting, bar planting position edge and base material concrete edge, bore diameter and bar planting diameter, reach raising Mechanics Performance of Adherence of New intensity, improve stress performance, limit the relative displacement of new-to-old concrete interface, improve anti-shear ability, effectively control the rut of novel concrete, gather around the diseases, the purpose increased the service life such as bag and reflection crack.
Description
Technical field
The present invention relates to the reinforcing of cement concrete pavement and maintenance field, specifically a kind of new-to-old concrete interface bar planting
Adhesive method.
Background technology
In recent years, concrete is widely used in civil construction project with its excellent engineering characteristic and road engineering is led
Domain.Under natural environment and human activity effect, there is substantial amounts of concrete structure to there occurs different journeys every year in world wide
The aging and damage of degree；Especially in China, concrete structure use is extremely extensive, due to designing, constructing and safeguarding improper, i.e.,
Make newly-built concrete structure, honeycomb, cavity, crack or even the disease such as collapse also occurs, so as to have a strong impact on structure just
Often use, greatly shorten the service life of structure.Investigation display：Adhesion strength on concrete binding face can be reduced constantly,
Its critical value used is reached after 17~20 years；One bridge block is after using 18 years, and the concrete topping in its structure only has
10% adhesion strength is intact, and 20% is weakened, and 70% adhesion strength completely lost.
In order to not influence the normal use of structure and ensure the service life of structure, by technological means to concrete structure
Carry out reinforcement and reinforce just into current urgent problem to be solved.And the key of success repairing and reinforcing is that New-old concrete
With reference to the binding ability of the two directly determines reinforcement and the strengthening quality of concrete structure.For the broken of road and bridge pavement
Damage, damaged, the loose concrete of rejecting is proposed in engineering, the method for repairing and mending of new finishing coat is poured.However, in natural environment and lotus
Under load effect, complicated stress is presented in binder course after repairing.For example, in the effect such as thermal gradient, drying and watering cycle, Frozen-thawed cycled
Under, often produce larger thermal stress and shrinkage stress near repairing faying face.Further, since the contraction of New-old concrete is not
Tension and shear stress can be formed near the effect of consistent and thermal gradient, faying face, in subsequent serviceability limit stage, faying face
Compression and shear stress can be formed again.This has all greatly accelerated the breakdown speed of bond between fresh and hardened concretes layer, causes repairing and reinforcing
Failure.It facts have proved：The road surface that tradition is repaired by cohesive force between New-old concrete, new-to-old concrete interface intensity is relatively low,
Poor durability, under normal use environment and Driving Loading, can be destroyed again quickly.
Because concrete structure is in, simple combination purely dependence new-to-old concrete interface between more complicated using process stress
To reach that the purpose of reinforcement and reinforced concrete is difficult to realize because the cohesive force that can be provided between the two interface compared with
It is small.In order to improve the cohesive force of faying face, except outer to the processing of old concrete surface dabbing, also widely used mixing after treatment
Solidifying soil surface smear chemical interface agent, concrete starch, directly pour the methods such as special concrete, configuration shear reinforcement only.Pass through
Engineering practice can be obtained, and new-old concrete bonding results in more preferable bearing capacity and using effect using bar planting processing mode.
Domestic and foreign scholars had carried out many researchs to Mechanics Performance of Adherence of New performance in recent years.In New-old concrete joint surface, reinforcing bar is set
Opening displacement of the connector to limit faying face, increases adhesion strength, solves New-old concrete in structural strengthening reinforcement
Reliable bond problem.However, the method for strengthening New-old concrete joint surface using bar planting processing mode there is no the calculating of shaping
Theoretical and job specfication.Influence the factor of steel concrete supporting performance many, and quantitative analysis of each factor to performance is especially less,
This limits steel concrete supporting part and used in practice to a certain extent.
The content of the invention
In view of the shortcomings of the prior art, the technical problem that the present invention is intended to solve is to provide a kind of new-to-old concrete interface and planted
Muscle adhesive method.This method passes through to the distance between two neighboring bar planting center, the anchorage depth of bar planting, bar planting position edge
Rational optimization, which is carried out, with the parameter such as the relation of the distance at base material concrete edge, bore diameter and bar planting diameter reaches that raising is new
The purpose of old concrete adhesion strength.
The technical scheme that the present invention solves the technical problem is to provide a kind of new-to-old concrete interface bar planting bonding side
Method, it is characterised in that comprise the following steps：
(1) base material concrete quality is checked：It is not less than C20 base material concrete surface to strength grade to carry out at dabbing
Reason, it is 2.5-4mm to make its roughness；
(2) the base material concrete after dabbing processing is carried out to surface and carries out bar planting construction：
A. snap the line is positioned：Base material concrete upper 60 ° of progress snap the line of rotation along its length, then opposite direction along its length
60 ° of degree of rotation carry out snap the line, as two oblique line intersection areas, the bore position of bar planting；Bore position is distributed in equilateral triangle,
The distance between two neighboring bore position centers of 6d ＜≤min (30d, 500mm)；Bore position edge and base material concrete edge
Distance >=max (5d, 100mm) of edge；D represents bar planting diameter；The bar planting diameter d >=10mm；
B. drill：According to bore position, drilling obtains bar planting hole；Drilling depth is that the anchorage depth of bar planting is met：max
(12d, 150mm)≤drilling depth≤B-max (5d, 50mm)；B is the thickness of base material concrete；
Bore diameter D and bar planting diameter d relation is met：D≤16mm, D >=d+4mm；16mm ＜ d≤25mm, D >=d+
6mm；D ＞ 25mm, D >=d+8mm；
C. borehole cleaning：Drilling is completed after a structural plane of base material concrete, carries out borehole cleaning operation；
D. glue is matched somebody with somebody：Reinforcing bar should thoroughly remove surface attachments, floating rust and greasy dirt before with glue, reach that bar planting prepares requirement；
Ensure that drilling, borehole cleaning work have been completed；Anchoring adhesive mixture is obtained with glue；
E. injecting glue：By in anchoring adhesive mixture injection bar planting hole, injection rate occurs to be implanted into anchoring adhesive mixture after reinforcing bar
The phenomenon being extruded is defined；
F. bar planting：Carry out bar planting immediately after the completion of injecting glue；
G. inspect for acceptance：Anchoring adhesive mixture carries out pull-out test after being fully cured；Using nondestructive test, test value
Reach off-load after design requirement；
(3) novel concrete is poured.
The method for pouring novel concrete is cleaning old concrete interface, interface is kept clean moistening；In base material concrete
One layer of cement paste of surface smear or interfacial agents, thickness are 3~6mm, then pour novel concrete；Novel concrete intensity requirement
A grade higher than base material concrete strength；Conserved after the completion of pouring.
During drilling, using the impact drilling, impact drill is uniformly pierced perpendicular to base material concrete surface, so as to keyhole
Depth.
The operating method of injecting glue is：The pull bar of hand-held automatic pressure filling device is pulled, by the anchoring adhesive mixture prepared
The capsula interna of filling device is sucked, it is noted that excluding the air in bar planting hole during injecting glue, the gluing nozzle of filling device is stretched into bar planting hole,
Pushing drawing rod makes in anchoring adhesive mixture hand-hole, and filling device is pulled out to outside hole in pull bar, until the gluing nozzle of filling device is taken out
Stop injecting glue when going out to from 1/3 hole depth of aperture, injection rate using the phenomenon that is implanted into anchoring adhesive mixture after reinforcing bar to occur to be extruded as
It is accurate；After the completion of anchoring adhesive mixture injecting glue, the spring and pull bar of sleeve, filling device filling device are cleaned up with acetone.
After the completion of the specific method of bar planting is injecting glue, reinforcing bar is implanted into anchoring adhesive mixture on the libation at an ancient wedding ceremony of end, insertion bar planting hole；
Want side to insert edge same direction during operation to rotate, so that anchoring adhesive mixture and reinforcing bar and bar planting hole wall surface bonding are closely knit；
Reinforcing bar will insert under bar planting hole duct bosom, normal temperature and not disturb bar planting within the defined time.
Compared with prior art, beneficial effect of the present invention is：
(1) this method reinforcing and repairing base material concrete by the way of plant anchor, can effectively strengthen the old and new's coagulation
The adhesive property of soil, improves stress performance, limits the relative displacement of new-to-old concrete interface, and anti-shear ability is strong, Neng Gouyou
Effect ground controls the rut of novel concrete, gathers around the diseases such as bag and reflection crack, increases the service life.
At load initial stage, the bonding that the shear-carrying capacity of New-old concrete is mainly New-old concrete undertakes, main bounded
Van der Waals force, mechanical snap power and chemical interactions in the transition zone of face undertake.With the increase of load, between New-old concrete
After cohesive force reaches capacity, adhesiving force destruction between New-old concrete simultaneously causes relative displacement between New-old concrete joint surface
Trend.Because old concrete surface becomes coarse after dabbing, when novel concrete surface is sent out on coarse old concrete surface
During raw relative changing of the relative positions trend, cause the displacement trend parallel to adhesive surface and the displacement trend perpendicular to adhesive surface, the latter causes
Implantation reinforcing bar between New-old concrete joint surface produces tension, and reinforcing bar tension makes to produce friction between New-old concrete joint surface
Power to resist the slip parallel to adhesive surface, meanwhile, implantation reinforcing bar is implanted into reinforcing bar also subject to the shearing between faying face, that is, and served
Dowel action.Therefore, in the case of bar planting New-old concrete bonding, including without the Mechanics Performance of Adherence of New in the case of bar planting and plant
Enter bonding two parts of New-old concrete caused by reinforcing bar.Implantation reinforcing bar causes in the active force between New-old concrete, frictional force
Be converted to the drawing-resistant function of implantation reinforcing bar；Dowel action is ultimately converted to be implanted into the tension effect of reinforcing bar, therefore, after implantation reinforcing bar
The cohesive force size of New-old concrete is finally determined by the tension force value of implantation reinforcing bar.
(2) the triangular pitch mode of bar planting is more uniformly stressed concrete, can be effectively improved only in the position of bar planting
Put that place's stress is larger and the less phenomenon of stress at non-bar planting position, improve the shearing strength of Mechanics Performance of Adherence of New, Neng Gouyou
Effect suppresses the development in crack, makes structure stress more uniform, improves the ductility of structure.
(3) anchorage depth of bar planting is to influence the key factor of structural damage form.Research shows：The anchoring of bar planting is deep
When degree is smaller, structure easily occurs concrete cone and extracts destruction；When the anchorage depth of bar planting is larger, reinforcing bar extraction easily occurs for structure
Rupture failure after destruction or reinforcing bar constriction.This method rationally devises the anchorage depth of bar planting, can not influence base material coagulation
Make bonding interface destruction extract earlier than reinforcing bar while soil property amount to destroy.The anchorage depth of bar planting is smaller, when structure is destroyed
When, reinforcing bar fails to reach yield strength, and reinforcing bar fails to be fully used；The anchorage depth of bar planting is larger, easily to substrate intensity
Impact, add operating expenses, influence efficiency of construction and strengthening quality.
(4) the distance between two neighboring bar planting center is rationally designed, while bonding shear strength is ensured, Ke Yiti
The utilization rate of high reinforcing bar, it is to avoid the waste of material, reduces unnecessary working procedure, and then can improve efficiency of construction and construction
Quality.When bar planting spacing is too small, bar planting is excessively intensive to be influenceed by group bar effect, and the bar planting after repairing does not play too your writing also
Used time is to occur matrix destruction, and reinforcing bar is not utilized effectively；The shearing strength of structure is not when bar planting spacing is excessive, after repairing
It can effectively improve, repair efficiency is not obvious.
(5) dabbing processing is carried out to base material concrete surface, it is 2.50-4.00mm, suitable roughness to make its roughness
Be conducive to improving the bonding shear strength between New-old concrete.
Brief description of the drawings
Fig. 1 is that the concrete road surface after a kind of repairing of embodiment of new-to-old concrete interface bar planting adhesive method of the present invention shows
It is intended to；
Fig. 2 is the concrete road surface after a kind of repairing of embodiment of new-to-old concrete interface bar planting adhesive method of the present invention
Cross-sectional view；(in figure：L represents drilling depth)
Fig. 3 is the brill of the bar planting after a kind of snap the line positioning of embodiment of new-to-old concrete interface bar planting adhesive method of the present invention
Hole site arrangement schematic diagram；(in figure：L represents the distance between two neighboring bore position center；M represents bore position edge
With the distance at base material concrete edge)
Embodiment
The specific embodiment of the present invention is given below.Specific embodiment is only used for that the present invention is further described, and does not limit
The application scope of the claims processed.
The invention provides a kind of new-to-old concrete interface bar planting adhesive method (abbreviation method, referring to Fig. 1-3), its feature
It is to comprise the following steps：
(1) base material concrete quality is checked：Base material concrete is old concrete；Choose base material strength grade of concrete not low
In C20 base material concrete as process object, base material strength grade of concrete index and modulus of elasticity should be according to field measurements
As a result existing national standards are pressed《Code for design of concrete structures》GB50010 is determined；Base material concrete surface is carried out at dabbing
Reason, it is 2.5~4mm to make its roughness, and removes stone and cement mortar of the loosening of base material concrete surface etc.；
(2) the base material concrete after dabbing processing is carried out to surface and carries out bar planting construction：
A. snap the line is positioned：Base material concrete turns clockwise 60 ° on along its length and carries out snap the line, then along its length
60 ° of degree of rotate counterclockwise carry out snap the line, as two oblique line intersection areas, the bore position of bar planting；Bore position is in equilateral triangle
Shape is distributed, and the minimum range ＞ 6d between two neighboring bore position center, ultimate range takes both 30d's and 500mm smaller
Value, i.e. min (30d, 500mm)；The distance at bore position edge and base material concrete edge >=both 5d's and 100mm is larger
Value, i.e. max (5d, 100mm)；D represents bar planting diameter (mm)；The bar planting diameter d >=10mm；
B. drill：According to bore position, with the impact drilling, bar planting hole is obtained；Drilling depth l is the anchorage depth of bar planting
Meet：The anchorage depth minimum value of bar planting takes both 12d and 150mm higher value；2. maximum≤B- of plant anchor depth
Max (5d, 50mm)；B is the thickness (mm) of size, i.e. base material concrete of the base material concrete along anchoring direction；In the present embodiment
Drilling depth is 15d；
Bore diameter D and bar planting diameter d relation meets table 1：
Table 1
| Bar planting diameter d (mm) | d≤16 | 16 ＜ d≤25 | D ＞ 25 |
| Bore diameter D (mm) | D≥d+4 | D≥d+6 | D≥d+8 |
Impact drill is used uniformly to be pierced perpendicular to base material concrete surface during drilling, so as to the depth of keyhole；
C. borehole cleaning：Drilling is completed after a structural plane of base material concrete, using brush special and hair-dryer (or rubber
Air bag, hand propelled inflator), carry out borehole cleaning operation；With the method for " blow four brush three times " during borehole cleaning, i.e., first blow floating in bar planting hole
Dirt, then cleans hole wall with water with brush special, and brush special pull in hole is rotated when cleaning with water, and brush is so blown repeatedly, is cleaned out
Dust in hole；
D. glue is matched somebody with somebody：Reinforcing bar should thoroughly remove surface attachments, floating rust and greasy dirt before with glue, reach that bar planting prepares requirement；
Ensure that drilling, borehole cleaning work have completed a construction section simultaneously, and organized to check and accept, carry out record of acceptance of concealed work；With glue
To be prepared according to the construction section consumption divided；Prepare obtaining bar planting by the anchoring adhesive specification of selection with glue ratio
Glue mixture, and be finished within the specification stipulated time；
E. injecting glue：Specific method is determined according to product description；General liquid anchoring adhesive mixture is automatic with hand-held
Pressure grouting equipment carries out injecting glue operation；Operating method is：The pull bar of hand-held automatic pressure filling device (abbreviation filling device) is pulled,
The anchoring adhesive mixture prepared is sucked to the capsula interna of filling device, it is noted that the air in bar planting hole is excluded, by filling device during injecting glue
Gluing nozzle stretch into bar planting hole and (about 8cm or so stretched into the present embodiment), pushing drawing rod makes in anchoring adhesive mixture hand-hole,
Filling device is pulled out to outside hole in pull bar, until the gluing nozzle of filling device is drawn to from the hole depth of aperture 1/3 (in the present embodiment about
3cm or so) when stop injecting glue, injection rate slightly has the phenomenon being extruded to be implanted into anchoring adhesive mixture after reinforcing bar and is defined；Anchoring adhesive
After the completion of mixture injecting glue, the sleeve of filling device, the spring of filling device and pull bar should be cleaned up with acetone, be used again with profit；
F. bar planting：Carry out bar planting immediately after the completion of injecting glue；The specific method of bar planting is satisfied for guarantee anchoring adhesive mixture
It is full, after the completion of injecting glue, the reinforcing bar processed is implanted into a little anchoring adhesive mixture of the end libation at an ancient wedding ceremony, slowly inserted in bar planting hole；During operation
Want side to insert edge same direction and rotate multiple, so that anchoring adhesive mixture and reinforcing bar and bar planting hole wall surface bonding are closely knit；Steel
Muscle will insert under bar planting hole duct bosom, normal temperature and not disturb bar planting (the present embodiment within the time as defined in anchoring adhesive specification
In be 24h)；
G. inspect for acceptance：The bar planting that send the nurse of special messenger scene to construct after bar planting in place, before gel, prevents collision；Plant
Muscle glue mixture carries out pull-out test after being fully cured；Using nondestructive test, test value reaches off-load after design requirement；It is non-
Destructive test reference《Concrete structure post-anchoring technology code》(JGJ145-2004) appendix A is performed；
(3) novel concrete is poured：Old concrete interface is cleared up, interface is kept clean moistening；In base material concrete surface
One layer of cement paste or interfacial agents are smeared, thickness is 3~6mm, then pours novel concrete；Novel concrete intensity requirement compares base
The high grade of material concrete strength；Conserved after the completion of pouring.
The present invention does not address part and is applied to prior art.
Claims (5)
1. a kind of new-to-old concrete interface bar planting adhesive method, it is characterised in that comprise the following steps：
(1) base material concrete quality is checked：The base material concrete surface for being not less than C20 to strength grade carries out dabbing processing, makes
Its roughness is 2.5-4mm；
(2) the base material concrete after dabbing processing is carried out to surface and carries out bar planting construction：
A. snap the line is positioned：Upper 60 ° of rotation carries out snap the line to base material concrete along its length, and then opposite direction rotates along its length
60 ° of degree carry out snap the line, as two oblique line intersection areas, the bore position of bar planting；Bore position is distributed in equilateral triangle, 6d ＜
The distance between two neighboring bore position center≤min (30d, 500mm)；Bore position edge and base material concrete edge
Distance >=max (5d, 100mm)；D represents bar planting diameter；The bar planting diameter d >=10mm；
B. drill：According to bore position, drilling obtains bar planting hole；Drilling depth is that the anchorage depth of bar planting is met：Max (12d,
150mm)≤drilling depth≤B-max (5d, 50mm)；B is the thickness of base material concrete；
Bore diameter D and bar planting diameter d relation is met：D≤16mm, D >=d+4mm；16mm ＜ d≤25mm, D >=d+6mm；d
＞ 25mm, D >=d+8mm；
C. borehole cleaning：Drilling is completed after a structural plane of base material concrete, carries out borehole cleaning operation；
D. glue is matched somebody with somebody：Reinforcing bar should thoroughly remove surface attachments, floating rust and greasy dirt before with glue, reach that bar planting prepares requirement；Ensure
Drilling, borehole cleaning work have been completed；Anchoring adhesive mixture is obtained with glue；
E. injecting glue：By in anchoring adhesive mixture injection bar planting hole, injection rate is squeezed with being implanted into anchoring adhesive mixture after reinforcing bar
The phenomenon gone out is defined；
F. bar planting：Carry out bar planting immediately after the completion of injecting glue；
G. inspect for acceptance：Anchoring adhesive mixture carries out pull-out test after being fully cured；Using nondestructive test, test value reaches
Off-load after design requirement；
(3) novel concrete is poured.
2. new-to-old concrete interface bar planting adhesive method according to claim 1, it is characterised in that pour novel concrete
Method is cleaning old concrete interface, interface is kept clean moistening；Base material concrete surface smear one layer of cement paste or
Person's interfacial agents, thickness is 3~6mm, then pours novel concrete；Novel concrete intensity requirement is higher than base material concrete strength one
Grade；Conserved after the completion of pouring.
3. new-to-old concrete interface bar planting adhesive method according to claim 1, it is characterised in that during drilling, using impact
Drilling, impact drill is uniformly pierced perpendicular to base material concrete surface, so as to keyhole depth.
4. new-to-old concrete interface bar planting adhesive method according to claim 1, it is characterised in that the operating method of injecting glue
It is：The pull bar of hand-held automatic pressure filling device is pulled, the anchoring adhesive mixture prepared is sucked to the capsula interna of filling device, during injecting glue
It is noted that excluding the air in bar planting hole, the gluing nozzle of filling device is stretched into bar planting hole, pushing drawing rod makes anchoring adhesive mixture
In hand-hole, filling device is pulled out to outside hole in pull bar, until the gluing nozzle of filling device stops when being drawn to from 1/3 hole depth of aperture
Injecting glue, injection rate is defined by being implanted into the phenomenon that being extruded occurs in anchoring adhesive mixture after reinforcing bar；Anchoring adhesive mixture injecting glue is completed
Afterwards, filling device sleeve, the spring of filling device and pull bar is cleaned up with acetone.
5. new-to-old concrete interface bar planting adhesive method according to claim 1, it is characterised in that the specific method of bar planting
It is that after the completion of injecting glue, reinforcing bar is implanted into anchoring adhesive mixture on the libation at an ancient wedding ceremony of end, insertion bar planting hole；Side is wanted to insert edge during operation same
Direction is rotated, so that anchoring adhesive mixture and reinforcing bar and bar planting hole wall surface bonding are closely knit；Reinforcing bar will insert bar planting hole duct most
Under depths, normal temperature bar planting is not disturbed within the defined time.
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| CN201710280953.1A CN107059536B (en) | 2017-04-26 | 2017-04-26 | A kind of new-to-old concrete interface bar planting adhesive method |
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Cited By (8)
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| CN107974952A (en) * | 2017-12-11 | 2018-05-01 | 中铁十局集团有限公司 | The method repaired using bridge repairing with concrete to bridge |
| CN109518985A (en) * | 2018-10-10 | 2019-03-26 | 广东省建筑设计研究院 | A kind of design and construction method improving the power transmission of new-old concrete interface |
| CN109629421A (en) * | 2018-11-20 | 2019-04-16 | 同济大学 | A kind of subsection beam construction method for adding steel pipe and horizontal distribution reinforcing bar |
| CN110499929A (en) * | 2019-08-28 | 2019-11-26 | 广东鼎耀工程技术有限公司 | A kind of construction auxiliary equipment and construction technology of reinforcing steel implant |
| CN110792101A (en) * | 2019-11-04 | 2020-02-14 | 广东省重工建筑设计院有限公司 | Underground building and implementation method thereof |
| CN111021186A (en) * | 2019-12-31 | 2020-04-17 | 广东粤路勘察设计有限公司 | Method for repairing large-space joint of concrete pavement slab |
| CN112525694A (en) * | 2020-12-01 | 2021-03-19 | 浙江瑞邦科特检测有限公司 | Nondestructive bar planting drawing test detection structure and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107974952A (en) * | 2017-12-11 | 2018-05-01 | 中铁十局集团有限公司 | The method repaired using bridge repairing with concrete to bridge |
| CN109518985A (en) * | 2018-10-10 | 2019-03-26 | 广东省建筑设计研究院 | A kind of design and construction method improving the power transmission of new-old concrete interface |
| CN109629421A (en) * | 2018-11-20 | 2019-04-16 | 同济大学 | A kind of subsection beam construction method for adding steel pipe and horizontal distribution reinforcing bar |
| CN110499929A (en) * | 2019-08-28 | 2019-11-26 | 广东鼎耀工程技术有限公司 | A kind of construction auxiliary equipment and construction technology of reinforcing steel implant |
| CN110792101A (en) * | 2019-11-04 | 2020-02-14 | 广东省重工建筑设计院有限公司 | Underground building and implementation method thereof |
| CN110792101B (en) * | 2019-11-04 | 2021-11-23 | 广东省重工建筑设计院有限公司 | Underground building and implementation method thereof |
| CN111021186A (en) * | 2019-12-31 | 2020-04-17 | 广东粤路勘察设计有限公司 | Method for repairing large-space joint of concrete pavement slab |
| CN112525694A (en) * | 2020-12-01 | 2021-03-19 | 浙江瑞邦科特检测有限公司 | Nondestructive bar planting drawing test detection structure and method |
| CN114775458A (en) * | 2022-03-17 | 2022-07-22 | 广州市交通设计研究院有限公司 | Method for additionally paving UHPC (ultra high performance concrete) layer on bridge deck concrete pavement layer |
| CN114775458B (en) * | 2022-03-17 | 2024-04-26 | 广州市交通设计研究院有限公司 | Method for additionally paving UHPC layer on bridge deck concrete pavement layer |
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