CN105603855A

CN105603855A - Method for repairing concrete pavement cracks

Info

Publication number: CN105603855A
Application number: CN201610007900.8A
Authority: CN
Inventors: 陈勇; 章玺; 吴方政
Original assignee: Hangzhou Roadmender Technology Co Ltd
Current assignee: Hangzhou Roadmender Technology Co Ltd
Priority date: 2016-01-05
Filing date: 2016-01-05
Publication date: 2016-05-25

Abstract

The invention discloses a method for repairing concrete pavement cracks. The method includes the steps that in the crack direction, inclined holes are drilled in a cross mode at certain intervals, all the inclined holes penetrate through crack cross sections, and then grouting is conducted on the inclined holes, so that the crack cross sections are filled with grout materials; or after the inclined holes are drilled, reinforcing steel bars are placed into the inclined holes, and then grouting is conducted. By means of the method, the pavement where cracks are generated can be repaired into a whole again, breakage maintenance is not needed, a lot of manpower and materials are saved, large mechanical equipment is not needed, and the novel repairing method is environmentally friendly, economical and effective.

Description

A kind of concrete road surface crack restorative procedure

Technical field

The invention belongs to cement concrete road surface recovery technique field, relate to a kind of concrete roadFacial cleft seam restorative procedure.

Background technology

The restorative procedure of traditional concrete road surface mainly contains two kinds, when concrete road surface breakageWhen serious, take directly to abolish and clear up former concrete slab, then cast in place concrete plate againRestorative procedure; Though there is the diseases such as cracking when concrete road surface, still have certain making hardWhen energy, generally take direct fracture to carry out the restorative procedure of the cementation of fissures or slip casting.

But the first restorative procedure need expend a large amount of artificial and materials, and abolish, clearlyManaging, stir, building or lifting all needs heavy mechanical equipment, and rehabilitation expense is high; The second is repaiiedCompound method is due to technological problems, and grout material cannot fully be filled crack, only fracture faces shapeBecome false confining bed, actual repairing effect is very limited. Therefore, proposing one more encirclesProtect, economical, effectively concrete road surface crack restorative procedure is necessary.

Summary of the invention

The object of the invention is the shortcoming in order to solve conventional concrete road facial cleft seam restorative procedureAnd deficiency, a kind of novel, environmental protection, economy are proposed, effectively repair in concrete road surface crackCompound method, this restorative procedure has maximally utilised former concrete road surface, will occur crackXoncrete structure again repair as a wholely, whole repair process only needs 2～3 workmansWith a small amount of special material, without heavy mechanical equipment.

According to on-site actual situations, and the instructions for use that after repairing, road face need reach, the methodMaster operation is to hole alternately in the both sides in crack, directly in bored hole slip casting orSlip casting again after first placing reinforcing bar in bored hole, described boring is the side direction from crackOffside rat holing, inclined hole is through crack section.

In technique scheme, described inclined hole and the angle of concrete road surface be 15 °-75 °; The crosspoint of described inclined hole and crack section is positioned under the mid point of concrete slab thickness of slabSide; The bottom of described inclined hole is positioned at concrete slab bottom top 3-8mm; Described reinforcing barIt can be Ribbed Bar.

Concrete construction method can be divided into:

1, rat holing → slip casting

1. rat holing

Along fractuer direction, intersect at a certain distance rat holing, at the coagulation of crack one sideOn soil plate, select first boring point A, then select second from the concrete slab of crack opposite sideBoring point B, by that analogy. By (15 ° of inclined angle alpha (angle of Kong Yudao face) rat holings75 ° of < α <), inclined hole is through crack section, and its intersection point is a little less than 1/2 concrete slab thickness of slab,The distance of boring point A and surface crack is L1, and inclined hole can not run through concrete slab, at the bottom of inclined holeEnd is H (being preferably 5mm left and right) with the distance at the bottom of concrete slab plate, boring point A and BBe L2 along fracture interval, concrete road surface crack repair schematic diagram see Fig. 1 and Fig. 2.

2. slip casting

Slip casting makes grout material directly arrive and fill near the splitting of inclined hole and concrete slab crosspointSeam section; Traditional grout material paste-making method is directly to start downward injection from surface crack, noteSlurry can not fully be filled crack; In the time adopting rat holing slip casting, owing to breaking in inclined hole and crackFace crosspoint is positioned at the middle part of concrete slab, can improve greatly the accuracy of slip casting, makesThe through crack of grout material section, reaches better filling section and the effect of the section that bonds; NoteSlip preferably adopts Workable, microdilatancy, the material that adhesion strength is high, early strong, high-strengthMaterial.

2, rat holing → placement reinforcing bar → slip casting

Adopt after said method rat holing, in inclined hole, first place the steel of diameter and suitable lengthMuscle, then slip casting.

Front a kind of operation (i.e. boring after directly slip casting) be mainly applicable to breakage light, repairThe not high general concrete road face of rear instructions for use is repaired; Rear a kind of operation (is placed after boringReinforcing bar is slip casting again) be mainly applicable to badly broken, the high concrete road of instructions for use after repairingFace is repaired.

Method of the present invention, for existing road surface repair method, can will produce crackRoad face again repair into as a whole, without abolishing maintenance, save a large amount of artificial andMaterial, without heavy mechanical equipment, and repairing effect is good, is a kind of environmental protection, economy, hasThe novel restorative procedure of effect.

Brief description of the drawings

Profile when Fig. 1 is the reparation of concrete road surface crack;

Fig. 2 is that Shi road face top view is repaired in concrete road surface crack.

Detailed description of the invention

Case study on implementation 1

Preparation 150mm*150mm*550mm concrete test block, average rupture strength is4.5MPa, by the placement of again aliging of the concrete test block section after fractureing, and by crack sectionBottom and two side-closed, on the concrete test block of crack one side, select first boringPoint A, then select second boring point B, two borings from the concrete slab of crack opposite sidePoint is 5cm from concrete test block edge, with L1=8cm, and L2=5cm, α=45 °, boreGet two cross one another inclined holes, inclined hole diameter is 2cm, and inclined hole is long is 15cm, then adoptsInjecting paste material (as the Hangzhou Special grouting material that people Science and Technology Ltd. produces of repairing the roads) is to tiltedlySlip casting is carried out in hole, until the slurry that overflows appears in fracture faces, after maintenance 2h, 1d, 7d, enters respectivelyRow bending test, the rupture strength of surveying in table 1.

Table 1 case study on implementation 1 is repaired rear concrete sample rupture strength

Case study on implementation 2

Bore mode, with case study on implementation 1, is placed diameter 12mm in inclined hole after boring, longThe Ribbed Bar of 11cm, then adopt Hangzhou repair the roads people Science and Technology Ltd. produce extraordinary slip castingMaterial carries out slip casting to inclined hole, until there is the slurry that overflows in fracture faces, difference maintenance 2h, 1d,After 7d, carry out bending test, the rupture strength of surveying in table 2.

Table 2 case study on implementation 2 is repaired rear concrete sample rupture strength

Comprehensive the above, use directly slip casting after rat holing, or rat holing is placed reinforcing bar againThis kind of restorative procedure of grouting behind shaft or drift lining, can make concrete road surface crack be repaired well effectReally, the method, without abolishing maintenance, can be saved a large amount of artificial and materials, without large scale computerTool equipment is a kind of environmental protection, economy, effective novel restorative procedure.

Claims

1. a concrete road surface crack restorative procedure, is characterized in that, comprises following technique:Hole alternately in the both sides in crack, directly slip casting or first in bored hole in bored holeSlip casting again after interior placement reinforcing bar, described boring is the side direction offside rat holing from crack,Inclined hole is through crack section.

2. concrete road surface according to claim 1 crack restorative procedure, is characterized in that,Described inclined hole and the angle of concrete road surface are 15 °-75 °.

3. concrete road surface according to claim 1 crack restorative procedure, is characterized in that,The crosspoint of described inclined hole and crack section is positioned at the mid point below of concrete slab thickness of slab.

4. concrete road surface according to claim 1 crack restorative procedure, is characterized in that,The bottom of described inclined hole is positioned at concrete slab bottom top 3-8mm.

5. concrete road surface according to claim 1 crack restorative procedure, is characterized in that,Described reinforcing bar is Ribbed Bar.