CN105484301A - Bridge bored pile foundation repairing method - Google Patents
Bridge bored pile foundation repairing method Download PDFInfo
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- CN105484301A CN105484301A CN201510822890.9A CN201510822890A CN105484301A CN 105484301 A CN105484301 A CN 105484301A CN 201510822890 A CN201510822890 A CN 201510822890A CN 105484301 A CN105484301 A CN 105484301A
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- pile foundation
- mending
- concrete
- repairing
- side well
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
Abstract
The invention provides a bridge bored pile foundation repairing method. The bridge bored pile foundation repairing method comprises the following steps: determining approximate positions of parts which are not up to standard with the aid of detecting equipment; then excavating a side well on one side of a pile foundation, wherein the depth of the side well is greater than that of the lowest end of a position which is not up to standard by 50 cm at least and all the parts which are not up to standards are enabled to be exposed; chiseling off the parts which are not up to the standard; cleaning hollow parts by clear water after chiseled silt is cleaned thoroughly; finally pouring the side well by using repairing concrete and enabling the repairing concrete to be completely filled in chiseled-off space and the part, which is connected with the chiseled-off space, inside the side well; and filling soil in the side well and compacting after complete curing of the repairing concrete. According to the repairing method, the repairing concrete can be filled in the chiseled-off space well and is in contact with the inner wall of the chiseled-off space in an attached manner, and after curing, the repairing concrete can be combined with the original pile foundation well. Compared with the prior art, the bridge bored pile foundation repairing method can save cost and shorten construction period.
Description
Technical field
The present invention relates to bridge pile foundation repair maintenance technical field, be specifically related to a kind of bridge struction pile pile foundation method for repairing and mending.
Background technology
Pile foundation is base form common in bridge engineering, and top bridge load can import in Rock soil Foundation by it, for it provides stable support.Castinplace pile is as common Bored Pile of Bridge form, and it has friction when constructing, and without soil compaction, the advantage of the little grade of noise, is thus used widely in bridge construction field.
When making castinplace pile, first needing to use rotary drilling rig construction borehole, putting into reinforcing cage after borehole, last Reperfu-sion concrete.Because the borehole wall dug out through rotary drilling rig is soil property, to boring in concrete perfusion time, easily peel off after the softer wall portion of soil property is immersed in water, and the operation vibrating to make concrete uniform filling to concrete is had when concrete perfusion, action of vibrating can cause the vibration of water, soil property hole wall is made more easily to be subject to erosion, hole wall generating portion even can be caused time serious to cave in, after hole wall collapse, the soil property of a part just can be mixed into castinplace pile side, when filling pile construction completes, when using supersonic reflectoscope to detect, this section of pile foundation being mixed with soil property will be detected as defective, weight capacity is not up to standard.Because the borehole degree of depth of concrete perfusion is very dark, general at more than 20m, during generation hole wall collapse, people can not know in advance, and castinplace pile entirety will be caused not up to standard once there be hole wall that comparatively serious caving in occurs, in order to complete construction, workman can only pour into by borehole again again, and this causes cost increase, claim for eot.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome prior art Bridge castinplace pile quality dissatisfaction when there is borehole hole wall collapse, in order to complete construction, workman have to again borehole perfusion, cause cost increase, the technological deficiency of claim for eot, thus a kind of bridge struction pile pile foundation method for repairing and mending is provided.
For this reason, the invention provides a kind of bridge struction pile pile foundation method for repairing and mending, comprise the steps:
S1. use checkout equipment to detect bridge struction pile pile foundation, determine the approximate location of part not up to standard;
S2. near excavation side, the described bridge struction pile pile foundation side well of described part not up to standard, the outer wall of described bridge struction pile pile foundation is exposed in the well of described side, and the degree of depth controlling described side well be deeper than described in the least significant end at least 50cm of part not up to standard;
S3. described part not up to standard cut, what formation was communicated with described side well cuts space, and is cleaned out by the silt particle chiseled out;
S4. clean moistening to the described inwall watering cutting space;
S5. mending concrete is used to build described side well, space and described side well is cut described in filling, and the height controlling to build is higher than the most significant end at least 200cm of described part not up to standard, after treating described mending concrete health, carries out fill compaction to described side well.
As the preferred case of one, in described step S5, described mending concrete is used to cut space and described side well is built completely to described.
As the preferred case of one, in described step S5, cut before space and described side well build at the described mending concrete of use to described, the sidewall of flexible protective film to described side well is used to protect, and the height making the height > of described flexible protective film use described mending concrete to build described side well, peel off to prevent soil property and cave in.
As the preferred case of one, in described step S2, when excavating described side well, use the sidewall of sand film to described side well to protect simultaneously, peel off to prevent soil property and cave in, the composition of described sand film is: the grains of sand of particle diameter within the scope of 0.5-0.1mm, be coated on the resin on described grains of sand surface, be added on the curing compound in described resin, be easy to the inorganic filler and the silane coupler that are formed micro nano structure by described resin-coating, the epoxy modified silicone resin of described resin to be epoxide number be 0.01-0.03eq/100g, the percentage by weight of described resin and the described grains of sand is 0.5-10:100, the percentage by weight of described curing compound and described resin is 15-20:100, the percentage by weight of described inorganic filler and described resin is 1-50:100, the percentage by weight of described silane coupler and described resin is 0.2-2:100.
As the preferred case of one, in described step S5, use tumbling barrel to carry out placement layer by layer to described side well, every layer thickness is not more than 50cm, use plug-in type vibrating rod in casting process, and control 5-10cm in described vibrating head insertion lower-layer concrete when upper strata concrete vibrating.
As the preferred case of one, in described step S5, the concrete number of bridge struction pile pile foundation described in the concrete > of described mending concrete.
As the preferred case of one, in described step S4, to the described inwall watering cutting space clean moistening after, keep MEBO ribbon gauze 24-48h.
As the preferred case of one, in described step S5, before building described mending concrete, the inwall first cutting space described and the described bridge struction pile pile foundation outer wall being exposed in the well of described side smear a layer binder, and described cementing agent comprises by weight: cement: medium sand: Guamishi: E44 epoxy resin: face phthalic acid and butyl ester: KH-560 silane coupler: curing compound=410-450:650-700:900-1000:90-120:6-10:1.5-3:70-90.
As the preferred case of one, described cementing agent comprises by weight: cement: medium sand: Guamishi: E44 epoxy resin: face phthalic acid and butyl ester: KH-560 silane coupler: curing compound=440:660:967:119:7.4:2.2:89.
Bridge struction pile pile foundation method for repairing and mending provided by the invention, has the following advantages:
1. pile foundation method for repairing and mending of the present invention, first the approximate location of part not up to standard is determined by checkout equipment, then at excavation side, pile foundation side well, side well depth is made to be deeper than the least significant end at least 50cm of position not up to standard, guarantee all parts not up to standard are exposed, then part not up to standard (being generally the concrete being mixed with silt) is cut, after the silt chiseled out is cleaned out, clear water is used to clean forced part, mending concrete offside well is finally used to build, mending concrete is filled completely enter into cut space and coupled part side well is inner, after mending concrete health completely, offside well carries out fill compaction again.Method for repairing and mending of the present invention, when using mending concrete to build casting space, simultaneously to cut the outer side well part that space is communicated with and build, and control the height of building at least 200cm higher than part most significant end not up to standard, such mending concrete under stress, can fine the be filled into and cut interior volume, fitting with the inwall cutting space contacts, and can combine with original pile foundation preferably after health.Preferred version is, use mending concrete to cutting space and side well is built in the lump, such concreting can be filled to enter into and be cut interior volume under very large pressure, and with cut the inwall close contact in space; In addition, cut the benefit that space and side well build in the lump and be also, the soil that causes because of excavation side well can be prevented for the inequality of pile foundation support degree, and the support effect to existing pile foundation can be strengthened.
After tested, pile foundation method for repairing and mending of the present invention is used to have good repair efficiency to peeling off because of hole wall to mix silt and detect underproof pile foundation, after method for repairing and mending of the present invention is repaired, supersonic reflectoscope is used to detect pile foundation, before repairing, testing result is III class pile foundation, be detected as I class pile foundation after repairing, meet pile foundation quality regulation.
2. pile foundation method for repairing and mending of the present invention, because hole wall collapse occurred stratum, position not up to standard, when building mending concrete again, the possibility of again caving in is larger, by protecting hole wall, prevent from soil property from peeling off to cave in, can pouring quality be ensured, prevent mixing new silt and cause intensity to reduce.
3. pile foundation method for repairing and mending of the present invention, the sidewall of flexible protective film offside well is used to protect, when building mending concrete, the situation preventing side cave-in can not only be played, can also avoid forming gap between protecting film and the sidewall of side well, the side borehole wall is fixed with the mending concrete jam-packed of building.
4. pile foundation method for repairing and mending of the present invention, when excavating side well, use the sidewall of sand film offside well to protect simultaneously, the composition of described sand film is: the grains of sand of particle diameter within the scope of 0.5-0.1mm, be coated on the resin on described grains of sand surface, be added on the curing compound in described resin, be easy to the inorganic filler and the silane coupler that are formed micro nano structure by described resin-coating, the epoxy modified silicone resin of described resin to be epoxide number be 0.01-0.03eq/100g, the percentage by weight of described resin and the described grains of sand is 0.5-10:100, the percentage by weight of described curing compound and described resin is 15-20:100, the percentage by weight of described inorganic filler and described resin is 1-50:100, the percentage by weight of described silane coupler and described resin is 0.2-2:100.Above-mentioned sand film has stronger surface corrosion resistance energy, its adhesiveness is stronger, easily the sidewall forming the side well just formed is adhered to each other, thus there is the higher effect preventing from soil property from peeling off caving in, the effect of protection side well sidewall can not only being played when building, side well can also being avoided to cause internal diameter excessive because caving in.
5. pile foundation method for repairing and mending of the present invention, when building mending concrete, tumbling barrel offside well is used to carry out placement layer by layer, the thickness controlling every layer is not more than 50cm, plug-in type vibrating rod is used when building, and insert 5-10cm in lower-layer concrete at upper strata concrete vibrating time control vibrating head, thus make to build evenly, completely.
6. pile foundation method for repairing and mending of the present invention, control the concrete number of the concrete > bridge struction pile pile foundation of mending concrete, make to be filled into the concrete strength cutting interior volume higher, and health is faster, be conducive to ensureing repair efficiency, make the bridge struction pile pile foundation after repairing have good support strength, and be conducive to the reduction of erection time.
7. pile foundation method for repairing and mending of the present invention, to cutting before space builds, first to cutting space wall, to carry out watering moistening, and keep MEBO ribbon gauze at 24-48h, and mending concrete can be made to be combined tightr with original pile foundation.
8. pile foundation method for repairing and mending of the present invention, before building mending concrete, the inwall cutting now space and the pile foundation outer wall being exposed in the well of side smear a layer binder, this cementing agent can be good at the mending concrete connecting former pile foundation outer wall and newly build, thus strengthens the adhesion of mending concrete and former pile foundation.Under test conditions, the axial tensile strength at the old and new interface is at about 1.7Mpa, and split tensile strength is at about 1.14Mpa, and shear strength, at about 2.16Mpa, thus greatly can strengthen the adhesion of mending concrete and former pile foundation outer wall for above-mentioned cementing agent.
Detailed description of the invention
Be further described in detail bridge struction pile pile foundation method for repairing and mending provided by the invention below, obviously, following embodiment is not the whole embodiment of the present invention.Based on embodiment described in the invention, those of ordinary skill in the art, not making the every other embodiment obtained under other creative work prerequisites, belong to protection scope of the present invention.In addition, if below in the described different embodiment of the present invention involved technical characteristic do not form conflict each other and just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of bridge struction pile pile foundation method for repairing and mending, comprises the steps:
S1. use supersonic reflectoscope to detect bridge struction pile pile foundation, determine that the approximate location of part not up to standard is near the 6m of underground;
S2. at excavation side, the described bridge struction pile pile foundation side well near described part not up to standard, side well large diameter is the smaller the better, in the present embodiment, diameter is 80cm, the outer wall of described bridge struction pile pile foundation side is exposed in the well of described side, and the degree of depth controlling described side well be deeper than described in the least significant end at least 50cm of part not up to standard; In the present embodiment, the altitude range due to position not up to standard is 5.8-6.1m, and therefore the degree of depth of side well is 6.15m;
S3. described part not up to standard cut, and check up and down, confirm the pile foundation part being mixed with silt to be cut completely, what formation was communicated with described side well cuts space, and is cleaned out by the silt particle chiseled out;
S4. clean moistening to the described inwall watering cutting space;
S5. mending concrete is used to build described side well, space and described side well is cut described in filling, and the height controlling to build is higher than the most significant end 200cm of described part not up to standard, after treating described mending concrete health, carries out fill compaction to described side well.
The pile foundation method for repairing and mending of the present embodiment, first the approximate location of part not up to standard is determined by supersonic reflectoscope (those skilled in the art also can adopt other available equipment), then at excavation side, pile foundation side well, side well depth is made to be deeper than the least significant end at least 50cm of position not up to standard, guarantee all parts not up to standard are exposed, then part not up to standard (being generally the concrete being mixed with silt) is cut, after the silt chiseled out is cleaned out, clear water is used to clean forced part, mending concrete offside well is finally used to build, mending concrete is filled completely enter into cut space and coupled part side well is inner, after mending concrete health completely, offside well carries out fill compaction again.The method for repairing and mending of the present embodiment, when using mending concrete to build casting space, simultaneously to cut the outer side well part that space is communicated with and build, and control the height of the building 200cm higher than part most significant end not up to standard, such mending concrete under stress, can fine the be filled into and cut interior volume, fitting with the inwall cutting space contacts, and can combine with original pile foundation preferably after health.
After tested, pile foundation method for repairing and mending of the present invention is used to have good repair efficiency to peeling off because of hole wall to mix silt and detect underproof pile foundation, after method for repairing and mending of the present invention is repaired, supersonic reflectoscope is used to detect pile foundation, before repairing, testing result is III class pile foundation, be detected as I class pile foundation after repairing, meet pile foundation quality regulation.
As the preferred scheme of one, in step s 5, cut before space and described side well build at the described mending concrete of use to described, also comprise and the sidewall of described side well is protected, peel off the step of caving in prevent soil property.
Concrete, can use flexible protective film (as plastic foil) to as described in the sidewall of side well protect, and the height making the height > of described flexible protective film use described mending concrete to build described side well.
Because hole wall collapse occurred stratum, position not up to standard, then when building mending concrete, the possibility of again caving in is larger, by protecting hole wall, prevent from soil property from peeling off to cave in, can pouring quality be ensured, prevent mixing new silt and cause intensity to reduce.
As a kind of deformation program, in described step S2, when excavating described side well, using the sidewall of sand film to described side well to protect simultaneously, peeling off to prevent soil property and cave in.This technical scheme, can not only playing the effect of protection side well sidewall, side well can also being avoided to cause internal diameter excessive because caving in when building.
The composition of described sand film is: the grains of sand of particle diameter within the scope of 0.5-0.1mm, be coated on the resin on described grains of sand surface, be added on the curing compound in described resin, be easy to the inorganic filler and the silane coupler that are formed micro nano structure by described resin-coating, the epoxy modified silicone resin of described resin to be epoxide number be 0.01-0.03eq/100g, the percentage by weight of described resin and the described grains of sand is the arbitrary value in 0.5-10:100, the percentage by weight of described curing compound and described resin is the arbitrary value in 15-20:100, the percentage by weight of described inorganic filler and described resin is arbitrary value of 1-50:100, the percentage by weight of described silane coupler and described resin is the arbitrary value in 0.2-2:100, described inorganic filler is silicon powder, the particle diameter of silicon powder is 10 μm-20 μm, and the percentage by weight of described inorganic filler and described resin molding is the arbitrary value in 15-20:100, described curing compound is Polymercaptan curing agent, as improvement, high molecular surfactant and hydrophobic polymer is also added with in described resin, described high molecular surfactant is polymethyl hydrogen siloxane or polyethers dimethyl siloxane, and described hydrophobic polymer is polysiloxanes or polyorganosiloxane ramification.
As a kind of optimal technical scheme, in described step S5, tumbling barrel is used to carry out placement layer by layer to described side well, every layer thickness is not more than 50cm, plug-in type vibrating rod is used in casting process, and 5-10cm in described vibrating head insertion lower-layer concrete is controlled when upper strata concrete vibrating, can make to build evenly, completely.
In described step S5, use the concrete number of mending concrete for C30, larger than the concrete C25 of existing pile foundation, the benefit of the concrete of the concrete > bridge struction pile pile foundation of mending concrete number is, can make to be filled into the concrete strength cutting interior volume higher, and health is faster, is conducive to ensureing repair efficiency, make the bridge struction pile pile foundation after repairing have good support strength, and be conducive to the reduction of erection time.Those skilled in the art can select concrete other concrete number within the scope of C30-C50 as mending concrete, also can play good technique effect.
As further preferred version, in step s 4 which, to the described inwall watering cutting space clean moistening after, keep MEBO ribbon gauze 24-48h, such benefit to make mending concrete be combined tightr with original pile foundation.
Embodiment 2
The present embodiment provides a kind of bridge struction pile pile foundation method for repairing and mending, and it is the improvement on embodiment 1 basis, and difference is: in step S5, uses described mending concrete to cut space and described side well is built completely to described.
The benefit of the present embodiment is: the mending concrete of building can be made to fill to enter under very large pressure and cut interior volume, and with cut the inwall close contact in space; In addition, the soil that causes because of excavation side well can be prevented for the inequality of pile foundation support degree, and the support effect to existing pile foundation can be strengthened.
Embodiment 3
The present embodiment provides a kind of bridge struction pile pile foundation method for repairing and mending, it is the improvement in embodiment 1 or embodiment 2 basis, difference is: in step S5, before building described mending concrete, the inwall first cutting space described and the described bridge struction pile pile foundation outer wall being exposed in the well of described side smear a layer binder, and described cementing agent comprises by weight: cement: medium sand: Guamishi: E44 epoxy resin: face phthalic acid and butyl ester: KH-560 silane coupler: curing compound=440:660:967:119:7.4:2.2:89.
Above-mentioned cementing agent can be good at the mending concrete connecting former pile foundation outer wall and newly build, thus strengthens the adhesion of mending concrete and former pile foundation.Under test conditions, the axial tensile strength at the old and new interface is at about 1.7Mpa, and split tensile strength is at about 1.14Mpa, and shear strength, at about 2.16Mpa, thus greatly can strengthen the adhesion of mending concrete and former pile foundation outer wall for above-mentioned cementing agent.
In fact, the composition comprised by weight when cementing agent is: cement: medium sand: Guamishi: E44 epoxy resin: face phthalic acid and butyl ester: KH-560 silane coupler: during curing compound=410-450:650-700:900-1000:90-120:6-10:1.5-3:70-90, also can reach close technique effect.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (9)
1. a bridge struction pile pile foundation method for repairing and mending, is characterized in that: comprise the steps
S1. use checkout equipment to detect bridge struction pile pile foundation, determine the approximate location of part not up to standard;
S2. near excavation side, the described bridge struction pile pile foundation side well of described part not up to standard, the outer wall of described bridge struction pile pile foundation is exposed in the well of described side, and the degree of depth controlling described side well be deeper than described in the least significant end at least 50cm of part not up to standard;
S3. described part not up to standard cut, what formation was communicated with described side well cuts space, and is cleaned out by the silt particle chiseled out;
S4. clean moistening to the described inwall watering cutting space;
S5. mending concrete is used to build described side well, space and described side well is cut described in filling, and the height controlling to build is higher than the most significant end at least 200cm of described part not up to standard, after treating described mending concrete health, carries out fill compaction to described side well.
2. bridge struction pile pile foundation method for repairing and mending according to claim 1, is characterized in that: in described step S5, uses described mending concrete to cut space and described side well is built completely to described.
3. bridge struction pile pile foundation method for repairing and mending according to claim 1 and 2, it is characterized in that: in described step S5, cut before space and described side well build at the described mending concrete of use to described, the sidewall of flexible protective film to described side well is used to protect, and the height making the height > of described flexible protective film use described mending concrete to build described side well, peel off to prevent soil property and cave in.
4. bridge struction pile pile foundation method for repairing and mending according to claim 1, it is characterized in that: in described step S2, when excavating described side well, use the sidewall of sand film to described side well to protect simultaneously, peel off to prevent soil property and cave in, the composition of described sand film is: the grains of sand of particle diameter within the scope of 0.5-0.1mm, be coated on the resin on described grains of sand surface, be added on the curing compound in described resin, be easy to the inorganic filler and the silane coupler that are formed micro nano structure by described resin-coating, the epoxy modified silicone resin of described resin to be epoxide number be 0.01-0.03eq/100g, the percentage by weight of described resin and the described grains of sand is 0.5-10:100, the percentage by weight of described curing compound and described resin is 15-20:100, the percentage by weight of described inorganic filler and described resin is 1-50:100, the percentage by weight of described silane coupler and described resin is 0.2-2:100.
5. the bridge struction pile pile foundation method for repairing and mending according to any one of claim 1-4, it is characterized in that: in described step S5, tumbling barrel is used to carry out placement layer by layer to described side well, every layer thickness is not more than 50cm, use plug-in type vibrating rod in casting process, and control 5-10cm in described vibrating head insertion lower-layer concrete when upper strata concrete vibrating.
6. bridge struction pile pile foundation method for repairing and mending according to claim 1, is characterized in that: in described step S5, the concrete number of bridge struction pile pile foundation described in the concrete > of described mending concrete.
7. the bridge struction pile pile foundation method for repairing and mending according to any one of claim 1-6, is characterized in that: in described step S4, to the described inwall watering cutting space clean moistening after, keep MEBO ribbon gauze 24-48h.
8. the bridge struction pile pile foundation method for repairing and mending according to any one of claim 1-7, it is characterized in that: in described step S5, before building described mending concrete, the inwall first cutting space described and the described bridge struction pile pile foundation outer wall being exposed in the well of described side smear a layer binder, and described cementing agent comprises by weight: cement: medium sand: Guamishi: E44 epoxy resin: face phthalic acid and butyl ester: KH-560 silane coupler: curing compound=410-450:650-700:900-1000:90-120:6-10:1.5-3:70-90.
9. bridge struction pile pile foundation method for repairing and mending according to claim 8, is characterized in that: described cementing agent comprises by weight: cement: medium sand: Guamishi: E44 epoxy resin: face phthalic acid and butyl ester: KH-560 silane coupler: curing compound=440:660:967:119:7.4:2.2:89.
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| CN201510822890.9A CN105484301A (en) | 2015-11-24 | 2015-11-24 | Bridge bored pile foundation repairing method |
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Application publication date: 20160413 |