CN105019480B - Construction treatment method for building cracks - Google Patents
Construction treatment method for building cracks Download PDFInfo
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- CN105019480B CN105019480B CN201510301505.6A CN201510301505A CN105019480B CN 105019480 B CN105019480 B CN 105019480B CN 201510301505 A CN201510301505 A CN 201510301505A CN 105019480 B CN105019480 B CN 105019480B
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- grouting
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- sealing groove
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Abstract
The invention discloses a construction treatment method for building cracks. The construction treatment method comprises the steps that on-site crack checking and locating are conducted; a U-shaped groove is dug; rapid hardening micro expanding cement is adopted for sealing the U-shaped groove, and a grouting channel is formed in the bottom of the U-shaped groove; water feeding and gas tests are conducted; preliminary grouting and secondary grouting are conducted; surface dressing is conducted; and an epoxy emulsion mortar waterproof enhancement layer is made, and water is sprayed for wetting and maintenance. The construction treatment method has the beneficial effects that the construction technology is simple and easy to achieve, the construction is fast, the construction period is short, environmental protection and energy saving are achieved, the labor intensity of workers is small, the construction comprehensive cost is low, and the application range is wide.
Description
Technical field
The present invention relates to a kind of Construction of Civil Engineering method is and in particular to a kind of building cracks process construction method.
Background technology
Developing rapidly with national economy, high-rise and high-rise building occurs in each city in a large number, these buildings
All generally carry basement, a universal problem is exactly the phenomenon that crack infiltration often in base arrangement, have impact on structure
Globality, reduce the service life of building, had a strong impact on the normal use of building.The water of general basement periphery
Position is all higher, and the circulating water in soleplate crack is press water, and this pressure is with the alternately continuous periodicity of drought period in flood season
Change is it is easy to cause the development further in crack, and most crack is to start from the bottommost of base plate, and crack is in base plate
Internal evolution is very complicated, and blocking construction difficulty is very big.
Content of the invention
The technical problem to be solved in the present invention is to overcome the shortcomings of that prior art exists, and provides a kind of construction technology simply easy
Row, speed of application are fast, short time limit, environmental protection and energy saving, labor strength are little, construction relatively low, applied widely the building of comprehensive cost
Build crack treatment construction method.
For solving above-mentioned technical problem, the present invention employs the following technical solutions：
A kind of building cracks process construction method, comprise the following steps：
（1）Site inspection crack situation, and fracture position is marked；
（2）Dig U-type groove along crack, the concrete loosening in U-type groove, floating dust and impurity are removed；
（3）Sealing groove is carried out to U-type groove using rapid hardening micro-expansion cement, using first pre-buried pipeline and in sealing groove process during sealing groove
In the mode of progressively this pipeline of pull form, in U-type groove bottom, grouting channel connect along crack arrangement and with whole piece crack, together
When along the multiple grouting nozzle connecting with grouting channel of grouting channel interval setting；
（4）Crack after the completion of sealing groove is carried out with water flowing and gas testing inspection it is ensured that the good seal in whole piece crack, and be in the milk
Passage and the ventilation of each grouting nozzle are smooth, and process of otherwise doing over again is until meet above-mentioned requirements；
（5）It is in the milk for the first time, all grouting nozzles are opened, using grouter, serosity is injected a note of crack end
Slurry mouth, when next grouting nozzle emerges pure slurry, stops being in the milk and close the grouting nozzle of this grout, then grouter continues note
Slurry, until next one grouting nozzle is emerged during pure slurry, stops being in the milk and close the grouting nozzle of this grout；According to above-mentioned grouting method
Remaining grouting nozzle is closed one by one, makes whole piece crack be completely filled with serosity；
（6）Before the serosity of grouting heals at crack completely for the first time, choose the spaced grouting nozzle of two or more and divide
Do not carry out second grouting；
（7）The grouting nozzle excision of concrete surface after serosity solidifies completely, will be protruded, then sealed with sqtructural adhesive,
Then carry out surfacing process, check whether still there is Seepage, such as there is Seepage and be then in the milk again；
（8）Along crack brushing epoxy emulsion interfacial agents, repaste and smear the formation epoxy emulsion mortar waterproof increasing of epoxy emulsion mortar
Strong layer；
（9）After epoxy emulsion mortar waterproof enhancement layer final set, watering moist curing more than 3 days.
Above-mentioned method is it is preferred that described step（2）In, U-type groove groove depth is 3～5cm, a width of 4～6cm of notch, U-shaped
The two ends of groove extend at least 10cm than the two ends in crack respectively.
Above-mentioned method is it is preferred that described step（3）In, carrying out sealing groove concrete operations to U-type groove is to be divided into U-type groove
Multistage simultaneously carries out sealing groove paragraph by paragraph, during first paragraph U-type groove sealing groove, buries a flexibility in U-type groove bottom along crack position directly above
Sebific duct, on sebific duct, multiple grouting nozzles are installed at interval, are fixed grouting nozzle using rapid hardening micro-expansion cement, more micro- swollen using rapid hardening
Swollen cement carries out overall sealing groove to this section of U-type groove, and while overall sealing groove, the length direction along U-type groove pulls sebific duct, with U
The grouting channel that the formation of type groove bottom is connected with crack and all grouting nozzles, after the completion of first paragraph U-type groove sealing groove, makes sebific duct retain
One section is located in the cement of this section of U-type groove, and this sebific duct other parts is embedded in directly over the crack of second segment U-type groove bottom
Position, repeats above-mentioned sealing groove step and carries out sealing groove to second segment U-type groove；Successively remaining each section of U-type groove is entered according to the method described above
Row sealing groove, until after final stage U-type groove sealing groove finishes, extracting sebific duct out and obturage in exit；Spray water after cement final set
Maintenance.
Above-mentioned method is it is preferred that described grouting nozzle includes aluminum supervisor and is connected to aluminum and is responsible for the stainless of one end
Steel disc, the two ends of described stainless steel substrates extend to the both sides of aluminum supervisor respectively and form a bendable folding part, when installing grouting nozzle,
Make aluminum be responsible for connect stainless steel substrates one end offset with sebific duct, then by the bendable folding part of both sides be bent to respectively with sebific duct two
Side offsets.
Above-mentioned method is it is preferred that the length of each section of U-type groove is 50～70cm；The length of described sebific duct is 1 ~ 1.5m,
A diameter of 8mm；Spacing between adjacent grouting nozzle is 20～50cm.
Above-mentioned method is it is preferred that described step（5）In, in fracture width≤3mm, grouting is using modified for the first time
Epoxy chemical grouting liquid and the mixed serum of firming agent, the mass ratio of modified epoxy chemical grouting liquid and firming agent is 10:1；?
During fracture width ＞ 3mm, grouting is using the mixed serum of polychloroprene latex waterproof paste and modified epoxy chemical grout, chlorine for the first time
The mass ratio of fourth latex waterproof paste and modified epoxy chemical grout is 5:1；Wherein, modified epoxy chemical grouting liquid is by asphalt mixtures modified by epoxy resin
Fat, modification liquid and diethylenetriamine composition, polychloroprene latex waterproof paste is by water, cement, polychloroprene latex waterproofing agent A material and neoprene
Newborn waterproofing agent B material is mixedly configured into, and counts in mass ratio, water：Cement：Polychloroprene latex waterproofing agent A expects：Polychloroprene latex waterproofing agent B
Material=1:4:2:2.
Above-mentioned method is it is preferred that described step（4）In, the crack after the completion of sealing groove is carried out with water flowing and gas testing inspection
Concrete operations be first to pour into no pressure water to the grouting nozzle on whole piece crack, check whether mutually unimpeded between each grouting nozzle, if
Grouting channel directly over crack is not smooth or there is clogging, then carry out process of doing over again, such as no, then by the note on this crack
Slurry mouth closing, a reserved grouting nozzle is passed through sealing effectiveness and the ventilatory conditions in air pressure check whole piece crack.
Above-mentioned method is it is preferred that described step（5）In, the front grouting pressure height of rear once grouting pressure ratio, and whole
In individual filling process, the scope of grouting pressure is 0.1Mpa ~ 0.4Mpa.
Above-mentioned method is it is preferred that described epoxy emulsion mortar is mixed by epoxy emulsion, firming agent, cement and normal sand
Form, and by mass percentage, epoxy emulsion：Firming agent：Cement：Normal sand=4:1:7:10.5.
Above-mentioned method is it is preferred that the thickness of described epoxy emulsion mortar waterproof enhancement layer is more than 10mm.
Compared with prior art, it is an advantage of the current invention that：Building cracks of the present invention process construction method and adopt low pressure slow
Fast slip casting method, by have low viscosity, high intensity, high osmosis, strong adsorptivity new chemical grouting liquid be filled into whole base plate
Gap in, so that serosity is spread in concrete crack, solidify, all gaps are filled up completely with closely knit, make to produce the position in crack
Cementing, strengthen, reinforce and formed entirety, in thorough closed bottom cross aquaporin, reach the mesh of waterproof, leak stopping and structural strengthening
Ground.Its construction technology is simple, and speed of application is fast, short time limit, environmental protection and energy saving, and sealing plugging effect gets instant result, and a labor is forever
Ease, and labor strength is little, and efficiency of construction is high, and construction comprehensive cost is relatively low.This construction method is applied to basement, people's air defense
Underground structure and structure sealing leak stopping reinforcement solutions and the superstructure such as engineering, tunnel, subway, culvert, colliery, hole be logical
The repairing antiseepage in the leakage area cracks such as thing, structures concrete beam plate, terrace, exterior wall, pond, toilet, is particularly suited for
The crack treatment of basement bottom board.
Brief description
Fig. 1 processes construction method process chart for building cracks of the present invention.
Fig. 2 do not bent by the present invention in bendable folding part using grouting nozzle when structural representation.
Structural representation when Fig. 3 bends in bendable folding part by the adopted grouting nozzle of the present invention.
Fig. 4 is the schematic diagram of trombone slide pore-forming in U-type groove.
Fig. 5 is the schematic diagram of each grouting nozzle distribution situation when grouting for the first time and grouting for the first time.
Fig. 6 is the configuration flow figure of the adopted serosity of second grouting.
Marginal data：
1st, aluminum supervisor；2nd, stainless steel substrates；21st, bendable folding part.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in figure 1, the building cracks of the present invention process construction method, comprise the following steps：
（1）Scene is looked into seam positioning, site inspection crack situation, and fracture position and is marked；Larger for water leakage
Or obvious position, after concrete base layer face is cleaned out, can directly observe the situation determining crack.Some cracks are not
Substantially, in the case that infiltration phenomenon cuts in and out, find at any time during looking into seam, at any time labelling.For moist concrete face
On be difficult to the fine infiltration crack realized, can be true by the crack sealing vestige that seeps water when concrete surface moisture just evaporates
Its crack location fixed, or uniformly thin after rises is dried spread one layer of dry cement powder, surface occur being at wet trace water seepage hole or
The position in crack, sealing visible white calcium hydroxide body in some infiltration cracks oozes out.After finding percolating water position accurately, made with symbol
Upper labelling in crack location hanging wire.Can determine that fracture width and depth further, the width in crack can be measured with steel ruler,
Can be measured with reading microscope for micro-cracks；The depth in crack can be detected with finer wire and magnifier, complicated bar
Under part, can be by boring ultrasound examination, to determine its depth and trend.According to construction needs, also can draw crack and launch
Figure, crack expanded view content includes：The position in crack, shape, crack is numbered, the length in crack, width, the infiltration situation in crack
Deng.
（2）Dig U-type groove along crack, the concrete loosening in U-type groove, floating dust and impurity are removed；U-type groove groove depth is 3
～5cm, a width of 4～6cm of notch, the two ends of U-type groove extend at least 10cm than the two ends in crack respectively.Will be loose in groove with wire brush
Dynamic concrete is removed, then with high pressure water flushing wash clean it is ensured that work surface and gap no floating dust, non-loosening granule, free from admixture and
Spot.In the pre-buried mozzle in the serious position of leak, the water carrying-off in crack is provided work surface for follow-up work.
（3）Sealing groove is carried out to U-type groove using rapid hardening micro-expansion cement, using first pre-buried pipeline and in sealing groove process during sealing groove
In the mode of progressively this pipeline of pull form, in U-type groove bottom, grouting channel connect along crack arrangement and with whole piece crack, together
When along the multiple grouting nozzle connecting with grouting channel of grouting channel interval setting.
（4）Crack after the completion of sealing groove is carried out with water flowing and gas testing inspection it is ensured that the good seal in whole piece crack, and be in the milk
Passage and the ventilation of each grouting nozzle are smooth, are interconnected by grouting channel between each grouting nozzle, and process of otherwise doing over again is until meet
Above-mentioned requirements.
（5）Be in the milk for the first time, all grouting nozzles opened, grouter is connected with crack end one grouting nozzle and incite somebody to action
Serosity injects this grouting nozzle, when next grouting nozzle emerges pure slurry, stops being in the milk and close the grouting nozzle of this grout, then fills
Pulp grinder continues slip casting, until next one grouting nozzle is emerged during pure slurry, stops being in the milk and close the grouting nozzle of this grout；According to upper
State grouting method to close remaining grouting nozzle one by one, make whole piece crack be completely filled with serosity.
（6）Before the serosity of grouting heals at crack completely for the first time, choose the spaced grouting nozzle of two or more and divide
Do not carry out second grouting；It is spaced the distance of 3～5 grouting nozzles between the two neighboring grouting nozzle of second grouting.Carry out
Back-grouting can ensure that full scale is protected in grouting, makes crack be completely filled with serosity.Grouting and second grouting operation are referring to figure for the first time
The sealing of hole order of 1. ~ 9. expression grouting for the first time in 5, Fig. 5, arrow points to a 9. number grouting nozzle and represents that slip casting is laid in first time slip casting
The position of machine, and slip casting machine is connected with a 9. number grouting nozzle, serosity is injected into whole piece from a 9. number grouting nozzle and splits, and filled circles represent first
The grouting nozzle directly being closed with tiger clamp during secondary grouting sealing of hole, open circles represent the grouting nozzle of second grouting.
（7）The grouting nozzle excision of concrete surface after serosity solidifies completely, will be protruded, being sealed with sqtructural adhesive,
The cured grouting liquid that spill and leakage is gone out is cleaned out, and carries out surfacing process, after grouting completes 24h, checks reinforcement quality
And effect, check whether still there is Seepage（Detect by an unaided eye or all touched with handss the dry and wet situation of concrete structural surface, protect
Card ground is dried no wet stain）, such as there is Seepage and be then in the milk again.
（8）The brushing epoxy emulsion interfacial agents along along the width range of each 150mm in crack both sides, repaste and smear epoxy emulsion mortar
Form epoxy emulsion mortar waterproof enhancement layer.The width of epoxy emulsion mortar waterproof enhancement layer is 300mm, and thickness is 10mm.
（9）After epoxy emulsion mortar waterproof enhancement layer final set（It is in reflective ash that epoxy emulsion mortar waterproof strengthens layer surface
White, generally 8～12h）, watering moist curing more than 3 days.
Above-mentioned steps（3）In, carrying out sealing groove concrete operations to U-type groove is, U-type groove is divided into multistage and is sealed paragraph by paragraph
Groove, the length of each section of U-type groove is 50～70cm；During first paragraph U-type groove sealing groove, in U-type groove bottom along crack position directly above
An embedded length is 1 ~ 1.5m, the flexible rubber hose of a diameter of 8mm, and on sebific duct, multiple grouting nozzles are installed at interval, and using speed
Grouting nozzle is fixed by solidifying micro-expansion cement, and the spacing between adjacent grouting nozzle is 20～50cm.Adopt rapid hardening micro-expansion cement again
Overall sealing groove is carried out to this section of U-type groove（Rapid hardening micro-expansion cement is put into by 0.3 ratio of mud and is quickly stirred into pasty state in water,
Initial set before slight fever when with hold into bulk exert oneself be pressed into U-type groove in U-type groove is blocked floating）, along U-shaped while overall sealing groove
The length direction of groove pulls sebific duct, thus the grouting channel connecting with crack and all grouting nozzles in the formation of U-type groove bottom, first
After the completion of section U-type groove sealing groove, so that sebific duct is retained in one section of cement being located at this section of U-type groove, and this sebific duct other parts is buried
In the crack position directly above of second segment U-type groove bottom, referring to Fig. 4, in Fig. 4, thick dashed line represents flexible rubber hose for trombone slide concrete operations
Position before pulling, heavy line represents the position after flexible rubber hose pulling, 101 expression grouting nozzles, and 102 represent U-type groove,
103 expression cracks.Repeat above-mentioned sealing groove step and sealing groove is carried out to second segment U-type groove；According to the method described above successively to remaining each section of U
Type groove carries out sealing groove, until after final stage U-type groove sealing groove finishes, extracting sebific duct out and obturage in exit, sealing groove cement requires
Compacting, surface layer are floating；Spray water curing after cement final set, curing time is 1 day.
When carrying out sealing groove operation, sebific duct must be fixed with rapid hardening micro-expansion cement in the surface junction of the edges of two sheets of paper arrangement in crack
Good, after the completion of this section of U-type groove sealing groove and before the initial set of sealing groove cement（About 2～5min）Pull sebific duct along U-type groove length side, with
When ensure sebific duct stay the residue length in the last period U-type groove cement be not less than 300mm.After the completion of sealing groove, it is necessary to assure trombone slide
The grouting channel of molding and whole piece crack（Or intersect all slits of insertion with it）Inside all connect, and on this crack
All grouting nozzles between mutually unimpeded（The grouting channel Main Function of trombone slide molding is that the air in crack when making slip casting is smooth
Discharge and the uniform through crack of serosity）.
When installing grouting nozzle, first measure and demarcate grouting point position along fracture strike with ribbon, according to fracture strike, width
The concrete conditions such as degree, size, length and depth arrange grouting nozzle, according to " wide seam, shallow seam dredge arrangement, and fine seam, deep seam are gathered
Put " principle lay, grouting nozzle all should be arranged in crack infall, wider place, the end in crack and crack through part, every seam
Ensure to be no less than two grouting nozzles, grouting nozzle should be directed at the crack junction of the edges of two sheets of paper and be arranged on predetermined position.
As shown in Figures 2 and 3, the grouting nozzle that the present invention adopts includes aluminum supervisor 1 and is connected to aluminum supervisor 1 one end
Stainless steel substrates 2, the two ends of described stainless steel substrates 2 extend to the both sides of aluminum supervisor 1 respectively and form a bendable folding part 21, can
The length of kink 21 is 11mm, when installing grouting nozzle, one end of aluminum supervisor 1 connection stainless steel substrates 2 is offseted with sebific duct, then
The bendable folding part 21 of both sides is bent to and offsets with the both sides of sebific duct respectively, the stainless steel substrates 2 after bending are U-shaped and are fastened in glue
Guan Shang, perpendicular to the ground after aluminum supervisor 1 is fixing.Aluminum supervisor 1 using tiger clamp stopped pipe mouth and can be bent into S shape, from
And by grouting nozzle closing it is also possible to a piece high-pressure rubber pipe of socket, it is convenient for second grouting, use when needing to close grouting nozzle
Iron wire tightens high-pressure rubber pipe, and constructing operation is very convenient.
Above-mentioned steps（5）In, width according to crack selects the different proportionings starching materials with infiltration situation, fracture width≤
During 3mm, for the first time grouting using the mixed serum of modified epoxy chemical grouting liquid and firming agent, modified epoxy chemical grouting liquid and
The mass ratio of firming agent is 10:1, add firming agent to stir during preparation in modified epoxy chemical grouting liquid, adopt
During this kind of serosity, second grouting is generally 2～4h with the interval time of grouting for the first time.In fracture width ＞ 3mm, first
Secondary grouting is using mixed serum, polychloroprene latex waterproof paste and the modification of polychloroprene latex waterproof paste and modified epoxy chemical grout
The mass ratio of epoxy chemical serosity is 5:1；Wherein, modified epoxy chemical grouting liquid is by epoxy resin, modification liquid and divinyl three
Amine forms, and polychloroprene latex waterproof paste is by water, cement, polychloroprene latex waterproofing agent A material and polychloroprene latex waterproofing agent B material mixed configuration
Become, and count in mass ratio, water：Cement：Polychloroprene latex waterproofing agent A expects：Polychloroprene latex waterproofing agent B material=1:4:2:2.Preparation handss
After dynamic agitator stirs in bucket, filtered with the drainage screen that screen size is less than 0.5mm, add and prepared
Modified epoxy chemical grouting liquid, is finally stirred for uniformly, and the amount of preparation of each grouting liquid is estimated according to each grouting construction
With slurry amount, grout cures time and enter to starch speed and determine, the setting time of serosity can be by changing the use of each composition material
Amount is adjusted, and concrete configuration flow chart is as shown in Figure 6.During using this kind of serosity, between second grouting and for the first time grouting
It is generally 6～8h every the time.
Above-mentioned steps（4）In, the crack after the completion of sealing groove is carried out with water flowing and the concrete operations of gas testing inspection is that sealing groove is complete
Cheng Hou, immediately to whole piece crack（Or cross one another all slits）On each grouting nozzle pour into no pressure water, check each grouting nozzle
Between whether mutually unimpeded, if the grouting channel directly over crack is not smooth or when there is clogging, carry out process of doing over again,
As no, then the grouting nozzle on this crack is closed.After sealing groove cement solidification, on this crack（Or the insertion that intersects is all
Crack）Grouting nozzle block closing, along one layer of suds of Crack Sealing groove location brushing, being passed through air pressure from one of grouting nozzle is
The compressed air of 0.2MPa, checks sealing effectiveness and the ventilatory conditions of whole piece seam.As leaked air, holding one's breath, porous is not exchanged information
Deng its reason of Abnormality Analysis, then process.
Above-mentioned steps（5）In, rear once grouting pressure is all high than a front grouting pressure, namely often closes a slip casting
Mouth, in grouting pressure rising next time, and whole filling process, the scope of grouting pressure is 0.1Mpa ~ 0.4Mpa.
Above-mentioned epoxy emulsion mortar is mixed by epoxy emulsion, firming agent, cement and normal sand, and by mass percentage
Meter epoxy emulsion：Firming agent：Cement：Normal sand=4:1:7:10.5.First mixed emulsion is prepared in proportion, then by water
Mud（P.O42.5）It is slowly added to mixed emulsion, enters to stir with handheld electric stirrer, finally in the emulsion element preparing
Sand stirring in adding in slurry.
The building cracks of the present invention process construction method and possess advantages below：
1st, adopt low pressure slip casting method at a slow speed, will there is the new chemical of low viscosity, high intensity, high osmosis, strong adsorptivity
Grouting liquid is filled in concrete crack, so that serosity is spread in concrete crack, solidifies, all gaps is filled up completely with closely knit, makes to produce
The position in raw crack is cementing, strengthen, reinforce and formed entirety, crosses aquaporin in thorough closed bottom, reach waterproofing and leakage-stopping and
The mesh ground of reinforcing.The method is applied simple for process, and speed of application is fast, and stagnant water effect gets instant result, in actual applications
Can the reduction of erection time, save this one-tenth.
2nd, energy resource consumption is low, the construction equipment simple structure being adopted, and easily operates, easy to use, workmen
It is easy to accept, can expertly operate quickly, social resources can be saved in a large number, and environment is not impacted substantially.Used
Various plants cheap, wherein, manual type grouter purchase price be 980 yuan/platform, grouting nozzle 0.3 yuan/, rubber
2 yuan/m of pipe.
3rd, workload is little, and labor strength is low, and efficiency of construction is high, and construction comprehensive cost is relatively low.As long as raggle operation one
Individual can complete independently, per work day can complete 25～30m.Grouting with plunger only needs to two people and can complete, daily can be complete
Become 200m.Can also be in each position parallel construction, reduction of erection time to greatest extent.
4th, the method not only serves the effect of impervious leakage-stopping to former coagulation base arrangement, also acts structural strengthening and repairing
Effect.Will not ftracture again in the crack of slip casting, Never-leakage again, once and for all.And traditional way is using hydrophobic
Mode, does drainage layer in base surface, then does concrete rigid layer on drainage layer, and water leads to filtered water level and imports sump again by water
Pumped basement, this way crack can keep leakage states for a long time, lead to concrete basicity to run off, so that reinforcing bar cannot be protected
And corrosion, the stability of impact structure, and room need to use pumping for water pump always under the service life interior room of building, draw water cost
Very high, this way can reduce the head room of basement simultaneously, reduces the use space of basement.
The performance indications of the adopted material of the present embodiment are as follows：
1st, rapid hardening micro-expansion cement：It is a kind of aluminium sulfate special cement with microdilatancy performance, there is setting rate
Hurry up, early strength is high, later strength sustainable growth the features such as.Specific targets are as shown in table 1.
Table 1
2nd, modified epoxy chemical grouting liquid：It is a kind of modified epoxy reinforcement new chemical grouting of low viscosity high intensity
Material, is made up of epoxy resin, modification liquid and diethylenetriamine, in the presence of catalyst, is separated into island status architecture,
There is rubber modified epoxy resin effect.Its stable chemical performance, intensity are high, caking property is strong, viscosity is low, contraction is little, concrete castability
Good, strong to the infiltration capacity of micro-cracks.Specific targets are as shown in table 2.
Table 2
3rd, polychloroprene latex waterproofing agent：It is a kind of strong and unyielding property waterproof material, by cation neoprene latex and relevant auxiliary agent
Composition.Its stable performance is non-aging, good with various material caking property, separates out latex parcel cement bonded sand granule in maintenance processes
Form network, latex is filled its space, increased its degree of compaction, makes moisture and corrosive medium be difficult to penetrate into.This waterproof material has
Good caking property, weatherability, corrosion resistance, resistance to water, impermeability, fold resistance and crack resistance.Specific targets are as shown in table 3.
Table 3
4th, epoxy emulsion waterproof mortar：It is by epoxy emulsion, firming agent, 525# ordinary portland cement and activated material, inserts etc.
A kind of strong and unyielding property two-component polymer cement group water-proofing material of response type of composition, has that workability is good, high mechanical strength, resistance to
Water, acid and alkali-resistance, corrosion resistance are strong, good endurance, impermeability are good, comprcssive strength is high, and active and passive cohesive force is strong, is adapted to backwater
Face waterproof.Specific targets are as shown in table 4.
Table 4
5th, cement：P.O42.5 cement from qualified brand.
6th, normal sand：From fine sand, through screening, washing, granule is uniformly clean, and clay content is less than 1%.
7th, manual type grouter：Main screw lift 6Kg, pressure limit 0.1～0.5Mpa.
For ensureing construction quality, in work progress it is important to note that following what time：
1st, the special implement (as steel ruler, table scale etc.) used in construction is both needed to specified period and tests, in terms of guaranteeing
Measuring device tool precision is it is ensured that continuous data is accurate.All special implements are sent personal management, keeping and are used.
2nd, during chisel U-type groove, should ensure that the reinforcing bar of former base arrangement is without damage.After the completion of U-type groove chisel concrete, use
High pressure water washing is it is ensured that no floating dust, non-loosening granule and no spot in U-type groove.
3rd, grouting nozzle answers reasonable Arrangement it is ensured that the serosity pouring in every crack is full.With rapid hardening micro-expansion cement sealing groove
When should be compacted, and be firmly bonded the sealing effectiveness it is ensured that stitching with basic unit face.
4th, whole grouting system must be checked before being in the milk comprehensively, be worked well in grouter, the unimpeded situation of pipeline
Under, can be in the milk.
5th, River Bank Stability is responsible for by special messenger, to reduce personal error, strict batching sequence, with measuring cup, table scale weigh it is ensured that
Raw material ratio accurately, is sufficiently stirred for.From low to high, maximum pressure must not exceed 0.4Mpa to grouting pressure.
6th, the change of grouting pressure and defeated slurry amount will be observed during slip casting all the time.When pump pressure abruptly increase, grouting amount reduces, many
It is that in managing, blocking or U-shaped interior grouting duct be not smooth.When grout absorption is larger, to consider by the thickness of note structure, analyze it
Trend, adjusts the grout cures time, is allowed to shorten setting time or by the way of intermittent grouting.
7th, enough grouting quantities, grouting time, suitable grouting pressure are ensured, fully spread in concrete with realizing serosity,
Filling.For ensureing permeability and the grouting effect of serosity, voltage stabilizing work must be carried out, and the grouting with crack different parts
Situation, adjusts grouting pressure.
8th, the material of job site should store classifiedly, and grouting equipment used, pipeline, container etc. should be indicated respectively.
9th, carry out construction note, indicate position, length, fracture width and the engineering time in crack in detail.Raw material is demonstrate,proved
The bright, quality certification and relevant survey report are collected and arrange.
Below in conjunction with several Specific construction examples, the effect of the present invention is described further：
Example one：Certain culture road Applied in Business Pedestrian Street G area of city engineering, overall floorage 85548m2, two layers of underground, on the ground ten
Seven layers, the minus two layers of construction area 14700m of basement2, minus two layers of base plate thickness are 250mm.After the completion of major project, underground
Different degrees of crack and infiltration phenomenon in 250mm thick base plate in room.Through statistics, the entirely total crack length of minus two layers of base plate
There is 6000m, daily water percolating capacity about 30t about.Through each side's main body unit demonstration, determine using said method, this base plate to be split
Seam is processed.The crack treatment of this engineering base plate, in starting at the beginning of 2014 4 months to construct, in mid-May, 2014 completion, is processed
Basement bottom board ne-leakage phenomenon more afterwards, xoncrete structure plate face has been completely dried no wet stain, has reached one-level water protection standards
Requirement it is ensured that engineering is delivered for use on time.This 139.26 yuan of basement bottom board crack treatment engineering economy construction cost, section
About building 119.36 ten thousand yuan of the cost that draws water in use.
Example two：Certain culture road Applied in Business Pedestrian Street D area of city engineering, overall floorage 22866m2, 23 layers on the ground, ground
Next layer, basement construction area is 5350m2, using raft mat foundation, the base plate thickness of main building part is 1m, annex part
Base plate thickness be 300mm.Find after Practical Completion that the thick base plate of 300mm occurs in that part infiltration crack, crack is through scene system
Count common 580m length, determine using said method, the position of this engineering bottom slab crack to be processed through each side's main body unit research,
Base plate no longer seeps water after treatment, and, entirely without wet stain, stagnant water effect is good for body structure surface.The crack treatment of this engineering base plate
In starting at the beginning of 2014 6 months to construct, in mid-June, 2014 completes, and saves 160,000 yuan of construction cost altogether, and saving building makes
With during 130,000 yuan of the cost that draws water..
Example three：Certain culture road Applied in Business Pedestrian Street A area of city engineering, overall floorage 36750m2, B1, on the ground ten
Two layers, using raft mat foundation, the plank thickness of main building part is 1m, and the base plate thickness of annex part is 300mm, complete in engineering
After work being found that basement bottom board occur in that crack infiltration phenomenon, soleplate crack overall length through count common 1800m, through each side's main body
Unit research determines using said method, the soleplate crack of this engineering to be processed, and this engineering base plate no oozes more after treatment
Leakage phenomenon is it is ensured that the work normal use of engineering.This engineering is in going into operation at the beginning of 2014 7 months, in late July, 2014 completion, common
41.78 ten thousand yuan of construction cost saved by meter.Save building 35.81 ten thousand yuan of the cost that draws water in use.
Example four：With certain minus two floor basement bottom board fracture unit expense in culture road Applied in Business Pedestrian Street G area of city, with construction
Front as follows to the economic comparison using different construction methods：
1st, the cost using the method for the present invention is：Dig U-shaped along crack location（Bag is artificial, mechanical）：15 yuan/m；Sealing groove expense（Bag is artificial, material, machinery）：30 yuan/m；Slip casting expense（Bag is artificial, material, machinery）：50 yuan/m；Do
Enhancement layer（Bag is artificial, material, machinery）：15 yuan/m；Other fees：10 yuan/m.Total 120 yuan/m.Existing base plate is averagely often put down
Square rice and flour amass in scope fracture length 0.41m, and being converted into every square metre of crack treatment expense is 0.41m × 120 yuan/m=49.2
Unit/m2.Total cost is：14700m2× 49.2 yuan/m2=72.32 ten thousand yuan.This way will not reduce the head room of basement.
If by the way of hydrophobic, do 10cm thickness drainage layer in base surface, then do 12cm thickness C40 concrete rigid layer
（Join φ 8@150 double-layer double-direction）, its cost is：Do drainage layer（Bag is artificial, material, machinery）：25 yuan/m2×14700m2
=36.75 ten thousand yuan；The reinforcing bar of rigid layer（Bag is artificial, material, machinery）：46 yuan/m2×14700m2=67.52 ten thousand yuan；Rigidity
The concrete of layer：73 yuan/m2×14700m2=107.31 ten thousand yuan.Total cost is：++=211.58 ten thousand yuan.This construction way can make
The head room of basement reduces 220mm.
Both the above construction method is compared, and first method saves construction cost than second method：211.58 ten thousand yuan-
72.32 ten thousand yuan=139.26 ten thousand yuan；Save the building cost that draws water in use：30t/d × 365d × 50 year ×
Ten thousand yuan of 2.18 yuan/t=119.36.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example.To those of ordinary skill in the art, obtained improvement and change under without departing from the technology of the present invention concept thereof
Change and also should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of building cracks process construction method it is characterised in that：Comprise the following steps：
（1）Site inspection crack situation, and fracture position is marked；
（2）Dig U-type groove along crack, the concrete loosening in U-type groove, floating dust and impurity are removed；
（3）Sealing groove is carried out to U-type groove using rapid hardening micro-expansion cement, during sealing groove using first pre-buried pipeline and during sealing groove by
The mode of step this pipeline of pull forms the grouting channel connect along crack arrangement and with whole piece crack, edge simultaneously in U-type groove bottom
The multiple grouting nozzle connecting with grouting channel of grouting channel interval setting；
（4）Crack after the completion of sealing groove is carried out with water flowing and gas testing inspection it is ensured that the good seal in whole piece crack, and grouting channel
Smooth with the ventilation of each grouting nozzle, process of otherwise doing over again is until meet above-mentioned requirements；
（5）It is in the milk for the first time, all grouting nozzles are opened, using grouter, serosity is injected a slip casting of crack end
Mouth, when next grouting nozzle emerges pure slurry, stops being in the milk and close the grouting nozzle of this grout, then grouter continues slip casting,
Until next one grouting nozzle is emerged during pure slurry, stop being in the milk and close the grouting nozzle of this grout；Will according to above-mentioned grouting method
Remaining grouting nozzle is closed one by one, makes whole piece crack be completely filled with serosity；
（6）Before the serosity of grouting heals at crack completely for the first time, choose the spaced grouting nozzle of two or more and enter respectively
Row is in the milk for second；
（7）The grouting nozzle excision of concrete surface after serosity solidifies completely, will be protruded, then sealed with sqtructural adhesive, then
Carry out surfacing process, check whether still there is Seepage, such as there is Seepage and be then in the milk again；
（8）Along crack brushing epoxy emulsion interfacial agents, repaste and smear epoxy emulsion mortar formation epoxy emulsion mortar waterproof enhancement layer；
（9）After epoxy emulsion mortar waterproof enhancement layer final set, watering moist curing more than 3 days;
Described step（3）In, carrying out sealing groove concrete operations to U-type groove is, U-type groove is divided into multistage and carries out sealing groove paragraph by paragraph, the
During one section of U-type groove sealing groove, bury a flexible rubber hose in U-type groove bottom along crack position directly above, sebific duct is spaced and installs
Grouting nozzle is fixed by multiple grouting nozzles using rapid hardening micro-expansion cement, then using rapid hardening micro-expansion cement, this section of U-type groove is carried out
Overall sealing groove, while overall sealing groove along U-type groove length direction pull sebific duct, with U-type groove bottom formed with crack and
The grouting channel of all grouting nozzle connections, after the completion of first paragraph U-type groove sealing groove, makes sebific duct retain one section and is located at this section of U-type groove
In cement, and this sebific duct other parts is embedded in the crack position directly above of second segment U-type groove bottom, repeats above-mentioned sealing groove step
Suddenly sealing groove is carried out to second segment U-type groove；Successively sealing groove is carried out to remaining each section of U-type groove according to the method described above, until final stage U
After type groove sealing groove finishes, extract sebific duct out and obturage in exit；Water curing is sprayed after cement final set;
Described grouting nozzle includes aluminum supervisor and is connected to the stainless steel substrates that aluminum is responsible for one end, the two ends of described stainless steel substrates
Extend to the both sides of aluminum supervisor respectively and form a bendable folding part, when installing grouting nozzle, so that aluminum is responsible for and connect stainless steel substrates
One end offset with sebific duct, then the bendable folding part of both sides be bent to offset with the both sides of sebific duct respectively.
2. building cracks according to claim 1 process construction method it is characterised in that：Described step（2）In, U-type groove
Groove depth is 3～5cm, a width of 4～6cm of notch, and the two ends of U-type groove extend at least 10cm than the two ends in crack respectively.
3. building cracks according to claim 1 process construction method it is characterised in that：The length of each section of U-type groove is
50～70cm；The length of described sebific duct is 1 ~ 1.5m, a diameter of 8mm；Spacing between adjacent grouting nozzle is 20～50cm.
4. building cracks according to claim 1 process construction method it is characterised in that：Described step（5）In, in crack
During width≤3mm, grouting for the first time is filled using the mixed serum of modified epoxy chemical grouting liquid and firming agent, modified epoxy chemistry
The mass ratio of serosity and firming agent is 10:1；In fracture width ＞ 3mm, for the first time grouting using polychloroprene latex waterproof paste and
The mixed serum of modified epoxy chemical grout, the mass ratio of polychloroprene latex waterproof paste and modified epoxy chemical grout is 5:1；Its
In, modified epoxy chemical grouting liquid is made up of epoxy resin, modification liquid and diethylenetriamine, polychloroprene latex waterproof paste by water,
Cement, polychloroprene latex waterproofing agent A material and polychloroprene latex waterproofing agent B material are mixedly configured into, and count in mass ratio, water：Cement：Neoprene
Latex waterproofing agent A expects：Polychloroprene latex waterproofing agent B material=1:4:2:2.
5. building cracks according to claim 1 process construction method it is characterised in that：Described step（4）In, to sealing groove
After the completion of crack carry out water flowing and the concrete operations of gas testing inspection are, first pour into no pressure water to the grouting nozzle on whole piece crack,
Check whether mutually unimpeded between each grouting nozzle, if the grouting channel directly over crack is not smooth or there is clogging, enter
Capable process of doing over again, such as no, then the grouting nozzle on this crack is closed, a reserved grouting nozzle is passed through air pressure check whole piece and splits
The sealing effectiveness of seam and ventilatory conditions.
6. building cracks according to claim 1 process construction method it is characterised in that：Described step（5）In, after once
Grouting pressure is higher than a front grouting pressure, and in whole filling process, the scope of grouting pressure is 0.1Mpa ~ 0.4Mpa.
7. building cracks according to claim 1 process construction method it is characterised in that：Described epoxy emulsion mortar is by ring
Oxygen emulsion, firming agent, cement and normal sand mix, and by mass percentage, epoxy emulsion：Firming agent：Cement：Standard
Sand=4:1:7:10.5.
8. building cracks according to claim 1 process construction method it is characterised in that：Described epoxy emulsion mortar waterproof
The thickness of enhancement layer is more than 10mm.
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| CN105464194B (en) * | 2016-01-11 | 2017-08-25 | 许昌水利建筑工程有限公司 | Less than the sewage network water-proof repairing construction method of level of ground water |
| CN105604163B (en) * | 2016-01-11 | 2017-08-25 | 许昌水利建筑工程有限公司 | Grouting construction method outside inside sewage pipeline leak stopping |
| CN105545006A (en) * | 2016-02-22 | 2016-05-04 | 中国水利水电第十一工程局有限公司 | HF-3 double-component polysulfide building sealant crack repairing method |
| CN106284424B (en) * | 2016-08-12 | 2018-05-22 | 中国电建集团西北勘测设计研究院有限公司 | A kind of grouting method of nontoxic low viscosity high-strength epoxy group chemical grouting material |
| CN106337449A (en) * | 2016-09-30 | 2017-01-18 | 绍兴上虞美林建设工程有限公司 | Crack repairing structure for underground engineering and construction method of crack repairing structure |
| CN108999421A (en) * | 2018-07-03 | 2018-12-14 | 广东碧通防水补强技术应用工程有限公司 | A kind of wall body structure seepage treatment method |
| CN108842778B (en) * | 2018-08-09 | 2020-08-28 | 中国三峡建设管理有限公司 | Grouting injection rate steep drop treatment method |
| CN109973117B (en) * | 2019-02-26 | 2021-02-12 | 倪念红 | Leaking stoppage and reinforcement method for structure crack |
| CN109826238A (en) * | 2019-02-26 | 2019-05-31 | 中铁十二局集团有限公司 | The construction method of ground-connecting-wall wall seam loss zone |
| CN110410112A (en) * | 2019-07-26 | 2019-11-05 | 大禹伟业(北京)国际科技有限公司 | A kind of tunnel project seam waterproof construction method |
| CN111305397B (en) * | 2020-02-28 | 2021-05-18 | 盐城笃诚建设有限公司 | Building exterior wall waterproof structure and construction method |
| CN112502048A (en) * | 2020-12-08 | 2021-03-16 | 云南省建设投资控股集团有限公司 | Highway T roof beam hogging moment slip casting exhaust observation pipe |
| CN112681790A (en) * | 2020-12-15 | 2021-04-20 | 国家电投集团江西中业兴达电力实业有限公司 | Grouting treatment method for concrete roof cracks |
| CN113107018B (en) * | 2021-05-21 | 2022-09-02 | 北京中煤矿山工程有限公司 | Method for treating leakage water of underground structure crack |
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| JPH09184206A (en) * | 1995-12-28 | 1997-07-15 | Ohbayashi Corp | Joint inducing crack |
| CN102493494B (en) * | 2011-12-12 | 2013-09-04 | 山东建筑大学 | Method for sealing vertical cracks of basement concrete structures by using microbial grouting |
| CN202788022U (en) * | 2012-08-03 | 2013-03-13 | 中程建工集团有限公司 | Wall crack combined type repair structure |
| CN203096961U (en) * | 2013-03-09 | 2013-07-31 | 熊艳芳 | Repairing constitution for concrete cracks |
| CN104294856A (en) * | 2013-07-15 | 2015-01-21 | 吕孟龙 | Concrete crack leaking stoppage method |
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