CN112392011A - Method for repairing gentle slope water release building surface by using ultra-high performance concrete - Google Patents
Method for repairing gentle slope water release building surface by using ultra-high performance concrete Download PDFInfo
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- CN112392011A CN112392011A CN202011145828.8A CN202011145828A CN112392011A CN 112392011 A CN112392011 A CN 112392011A CN 202011145828 A CN202011145828 A CN 202011145828A CN 112392011 A CN112392011 A CN 112392011A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
Abstract
The invention discloses a method for repairing the surface of a gentle slope water release structure by using ultra-high performance concrete. When an operator constructs one of the strips in the sequence, the other two strips in the sequence can be used as construction platforms, the damage of steel fibers caused by the fact that the operator stands on the ultrahigh-performance concrete to operate is avoided, and the condition that the repair construction of the ultrahigh-performance concrete in the groove to be repaired can be smoothly completed by the aid of hand stretching operation of workers on the operation platforms on the two sides of the groove to be repaired can be guaranteed. The inner face is repaired firstly, then the outer ring is constructed, so that the ultra-high performance concrete on the inner face shrinks firstly, when the ultra-high performance concrete on the outer ring is constructed, the ultra-high performance concrete on the inner face shrinks basically, and then the concrete on the outer ring can be tightly combined with the concrete on the inner face by the shrinkage of the poured ultra-high performance concrete, so that cracks are prevented.
Description
Technical Field
The invention relates to the field of maintenance of hydraulic engineering, in particular to a method for repairing the surface of a gentle slope water release structure by using ultra-high performance concrete.
Background
The ultra-high performance concrete is a composite material which has extremely high mechanical property, excellent volume stability, excellent shrinkage crack resistance, super high strength and durability and working life of 200 years, wherein the compressive strength can reach 150MPa, the electric flux is lower than 100C, the sulfate resistance grade exceeds KS150, and the freezing resistance grade exceeds F500. The super-high performance concrete is adopted to repair the abraded or seriously hollow reinforced concrete structure overflow surface, and the super-high performance concrete has strong abrasion resistance and impact resistance, good durability and high cost performance. However, the mechanical passing of the construction site of the water release structure in the narrow valley zone of the mountain area is difficult, manual construction is usually needed, and the self-flowing radius can reach 6m after discharging because the ultrahigh-performance concrete is doped with steel fibers and has high fluidity; the steel fiber of the ultra-high performance concrete can pierce shoes on the feet of workers and prick the feet of the workers, and the workers cannot stand on the ultra-high performance concrete to vibrate and plaster the concrete like the construction of common concrete. The vibration and plastering of the ultrahigh-performance concrete for large-area construction are extremely difficult, and false coagulation is easy to occur when the ultrahigh-performance concrete cannot be vibrated and plastered in time, so that the problems bring great difficulty for repairing the surface construction of a large-area gentle slope water release structure by the ultrahigh-performance concrete.
Disclosure of Invention
The invention aims to provide a method for repairing the surface of a gentle slope water release structure by using ultra-high performance concrete, which solves the problem of difficulty in repairing the ultra-high performance concrete.
The technical scheme adopted by the invention is as follows: a method for repairing the surface of a gentle slope water release building by using ultra-high performance concrete comprises the following steps:
s1, construction preparation: dividing the surface to be repaired into an inner surface and an outer ring according to the size of the surface to be repaired, wherein the outer ring is arranged around the inner surface, the inner surface is divided into a plurality of strips along the water flow direction, the plurality of strips are arranged into I-sequence strips and II-sequence strips at intervals, and the outer ring is arranged into III-sequence strips;
s2, repairing an I-sequence strip: taking the II-sequence strips or the III-sequence strips to be repaired as an operation platform, removing the damaged surface concrete at the positions of the I-sequence strips to form I-sequence grooves to be repaired, building mortar walls on the II-sequence strips or the III-sequence strips on two sides of the I-sequence grooves to be repaired along the edges of the I-sequence grooves to be repaired, and carrying out ultra-high performance concrete pouring construction in the I-sequence grooves to be repaired;
s3, repairing a band in the II sequence: after the ultrahigh-performance concrete in the I-order groove to be repaired is condensed, removing the damaged surface concrete at the position of the II-order strip by taking the repaired I-order strip or the repaired III-order strip as an operation platform to form a II-order groove to be repaired, building a mortar wall on the III-order strip on one side of the II-order groove to be repaired along the edge of the II-order groove to be repaired, and carrying out ultrahigh-performance concrete pouring construction in the II-order groove to be repaired;
s4, repairing the III-sequence strip: after the ultrahigh-performance concrete in the second-order groove to be repaired is condensed, the repaired first-order strip or second-order strip is taken as an operation platform, the damaged surface concrete at the position of the third-order strip is removed to form a third-order groove to be repaired, a mortar wall is built on the ground outside the third-order groove to be repaired along the edge of the third-order groove to be repaired, and the ultrahigh-performance concrete is poured in the third-order groove to be repaired.
Has the advantages that: the surface to be repaired is divided into an outer ring and an inner surface, and the concrete of the outer ring is tightly combined with the concrete of the inner surface to prevent cracks. Divide into I preface strip and II preface strips with the inner face, construct I preface strip, II preface strips, III preface strips in proper order, reduced the scope of construction at every turn, the operating personnel of being convenient for are under construction. And the mortar wall is built at the edge of the groove to be repaired, so that the overflow of the ultra-high performance concrete can be prevented, and the mortar wall can also be used as the reference of the plastering elevation of the ultra-high performance concrete. According to the method for repairing the surface of the gentle slope water release building by using the ultrahigh-performance concrete, the surface to be repaired is divided at intervals, so that when an operator constructs one sequence of strips, the other two sequences of strips can be used as construction platforms, the steel fiber damage caused by operation standing on the ultrahigh-performance concrete is avoided, and the condition that the repair construction of the ultrahigh-performance concrete in the groove to be repaired can be smoothly completed by the operation of the worker on the operation platforms at the two sides of the groove to be repaired can be ensured.
Further, in step S1, the width of the plurality of strips is set to be 1.5m to 2.0 m.
Further, in the steps S2, S3, and S4, the width of the mortar wall is set to 5cm to 10 cm.
Further, in the steps S2, S3 and S4, several mortar walls are all set to be level in height.
Further, in the steps S2, S3, and S4, the leveling, vibrating, and plastering are performed after the ultra-high performance concrete pouring construction.
Furthermore, before the plastering construction, the ultra-high performance concrete is scraped to be flush with the top surface of the mortar wall.
Furthermore, the mortar of the mortar wall has a mortar-sand ratio of 1: 3-1: 2.
Furthermore, reinforcing meshes or connecting anchor bars are arranged in the I-order groove to be supplemented, the II-order groove to be supplemented and the III-order groove to be supplemented.
Further, in step S1, the inner surface is divided into equal number of first-order bands and second-order bands.
Furthermore, the method for repairing the surface of the gentle slope water release structure by using the ultrahigh-performance concrete is applied to repairing the surface of a large-area gentle slope water release structure, and the inner surface is divided into I-order strips and II-order strips along the water flow direction.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a plan partition view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an I-order slot to be filled according to an embodiment of the present invention;
FIG. 4 is a schematic representation of a repaired I-sequence band in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a second-order slot to be filled according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a second-order band after repair in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of a III-order slot to be filled according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating a repaired III-order strip according to an embodiment of the present invention;
FIG. 9 is a flow chart of the construction process according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 9, the present invention provides a method for repairing a surface of a gentle slope water release building by using ultra-high performance concrete, comprising the steps of:
s1, construction preparation: dividing the surface to be repaired into an inner surface and an outer ring according to the size of the surface to be repaired, wherein the outer ring is arranged around the inner surface, the inner surface is divided into a plurality of strips along the water flow direction, the plurality of strips are arranged into a sequence I strip 1 and a sequence II strip 2 at intervals, and the outer ring is arranged into a sequence III strip 3;
s2, repairing the I-sequence strip 1: taking the II-sequence strip 2 or the III-sequence strip 3 to be repaired as an operation platform, removing the damaged surface concrete at the position of the I-sequence strip 1 to form an I-sequence groove to be repaired, building mortar walls 4 on the II-sequence strip 2 or the III-sequence strip 3 on two sides of the I-sequence groove to be repaired along the edge of the I-sequence groove to be repaired, and performing ultra-high performance concrete pouring construction in the I-sequence groove to be repaired;
s3, repairing the II-sequence strip 2: after the ultrahigh-performance concrete in the I-sequence groove to be repaired is condensed, the repaired I-sequence strip 1 or the repaired III-sequence strip 3 is taken as an operation platform, the damaged surface concrete at the position of the II-sequence strip 2 is removed to form a II-sequence groove to be repaired, a mortar wall 4 is built on the III-sequence strip 3 on one side of the II-sequence groove to be repaired along the edge of the II-sequence groove to be repaired, and the ultrahigh-performance concrete is cast in the II-sequence groove to be repaired;
s4, repairing the III-sequence strip 3: after the ultrahigh-performance concrete in the second-order groove to be repaired is condensed, the repaired first-order strip 1 or second-order strip 2 is used as an operation platform, the damaged surface concrete at the position of the third-order strip 3 is removed to form a third-order groove to be repaired, a mortar wall 4 is built on the ground outside the third-order groove to be repaired along the edge of the third-order groove to be repaired, and the ultrahigh-performance concrete is poured in the third-order groove to be repaired.
Should wait to mend the surface and divide into inner face and outer lane, divide into I preface strip 1 and II preface strips 2 with the inner face, this I preface strip 1 sets up with 2 intervals of II preface strips, I preface strip 1 of the construction in proper order, II preface strips 2, III preface strips 3, has reduced the scope of construction at every turn, and the operating personnel of being convenient for is under construction. And a mortar wall 4 is built at the edge of the groove to be repaired, so that the overflow of the ultra-high performance concrete can be prevented, and the ultra-high performance concrete can be used as a datum for plastering elevation. According to the method for repairing the surface of the gentle slope water release building by using the ultrahigh-performance concrete, the surface to be repaired is divided at intervals, so that when an operator constructs one sequence of strips, the other two sequences of strips can be used as construction platforms, the steel fiber damage caused by operation standing on the ultrahigh-performance concrete is avoided, and the condition that the repair construction of the ultrahigh-performance concrete in the groove to be repaired can be smoothly completed by the operation of workers on the operation platforms at two sides of the groove to be repaired can be ensured. The inner face is repaired firstly, then the outer ring is constructed, so that the ultra-high performance concrete on the inner face shrinks firstly, when the ultra-high performance concrete on the outer ring is constructed, the ultra-high performance concrete on the inner face shrinks basically, and then the concrete on the outer ring can be tightly combined with the concrete on the inner face by the shrinkage of the poured ultra-high performance concrete, so that cracks are prevented.
Preferably, in step S1, the width of the plurality of strips is set to 1.5m to 2.0m, the large-area surface to be repaired is divided into a plurality of strips with the width of 1.5m to 2.0m, construction is performed in three sequences, the width of the groove to be repaired is set in a proper width interval, so that an operator can conveniently perform ultra-high performance concrete pouring construction, uneven middle pouring caused by too large width of the groove to be repaired is prevented, and the mechanical property after repairing does not reach the standard.
Preferably, in steps S2, S3, and S4, the width of the mortar wall 4 is set to 5cm to 10cm, thereby enhancing the impact strength of the mortar wall 4.
Preferably, in steps S2, S3 and S4, the mortar walls 4 are all set to be level in height, so as to limit the flow of the ultra-high performance concrete in a large range and narrow the range of each operation.
Preferably, in steps S2, S3 and S4, the leveling, vibrating and plastering construction is performed after the ultra-high performance concrete pouring construction, so as to prevent quality problems such as pseudo-setting of the ultra-high performance concrete. The vibration can be realized by an insertion type vibrating rod or a flat plate vibrator. And after finishing plastering, performing covering maintenance.
Preferably, before plastering construction, the ultra-high performance concrete is scraped to be flush with the top surface of the mortar wall 4, so that the smoothness and the elevation of the repaired concrete surface meet the design requirements.
Preferably, the mortar of the mortar wall 4 has a mortar-to-sand ratio of 1:3 to 1:2, so that the mortar wall 4 can achieve the required mechanical properties.
Preferably, the reinforcing mesh or the connecting anchor bars are arranged in the I-order groove to be supplemented, the II-order groove to be supplemented and the III-order groove to be supplemented, and the reinforcing mesh and the connecting anchor bars can improve the impact resistance and the bonding strength.
Preferably, in step S1, the inner surface is divided into equal numbers of first-order bands 1 and second-order bands 2.
The invention provides a specific embodiment, and the method for repairing the surface of the gentle slope water release building by using the ultra-high performance concrete is applied to repairing the surface of a large-area gentle slope water release building. According to the size of the surface area of a large-area gentle slope water release building needing repairing, the large-area gentle slope water release building is divided into an inner face and an outer ring on a plane, the inner face is divided into an I-order strip 1 and an II-order strip 2 along the water flow direction, the I-order strip 1 and the II-order strip 2 are respectively arranged at two intervals, the outer ring is an III-order strip 3, four strips on the inner face are distributed at intervals in an I-order strip 1, an II-order strip 2, an I-order strip 1 and an II-order strip 2 in sequence, and separation lines of the inner face, the outer ring, the I-order strip 1, the II-order strip 2 and the III-order strip 3 are marked by.
Specifically, when repairing the I-sequence strip 1, firstly, damaged concrete in the I-sequence strip 1 is removed by using a high-pressure water gun or a manual roughening method and the like to form two I-sequence grooves to be repaired, loose concrete and floating slag in the I-sequence grooves to be repaired are completely removed, a mortar wall 4 is respectively built on the II-sequence strips 2 or the III-sequence strips 3 on two sides along the edge of the I-sequence grooves to be repaired, the top surface elevation of the mortar wall 4 is consistent with the design elevation of the overflow surface of a water drainage building, a repairing worker takes the concrete surface of the II-sequence strips 2 or the III-sequence strips 3 as an operation platform, and after the mortar wall 4 reaches the age of 4h, ultrahigh-performance concrete is poured in the I-sequence grooves to be repaired for repairing construction. After the I-sequence strip 1 is repaired and the ultra-high performance concrete is 1 day old, repairing operation of the II-sequence strip 2 is carried out, the repaired I-sequence strip 1 or the repaired III-sequence strip 3 serves as an operation platform, a mortar wall 4 on the II-sequence strip 2 and the damaged II-sequence strip 2 concrete are removed to form two II-sequence grooves to be repaired, if the III-sequence strip 3 is arranged on one side of the II-sequence strip 2, a mortar wall 4 is built on the edge of the III-sequence strip 3 along the II-sequence grooves to be repaired, and the ultra-high performance concrete is poured to carry out repairing construction on the II-sequence grooves to be repaired. And after the II-sequence strip 2 is repaired and the ultra-high performance concrete is 1 day old, repairing construction of the III-sequence strip 3 is carried out, the repaired I-sequence strip 1 or II-sequence strip 2 is used as an operation platform during construction, the mortar wall 4 on the III-sequence strip 3 and the damaged III-sequence strip 3 concrete are removed to form a III-sequence groove to be repaired, and the ultra-high performance concrete is poured to carry out repairing construction on the III-sequence groove to be repaired. The ultra-high performance concrete may be transported into the tank to be replenished by pumping, manual cart transport or other mechanical means.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. A method for repairing the surface of a gentle slope water release building by using ultrahigh-performance concrete is characterized by comprising the following steps of:
s1, construction preparation: dividing the surface to be repaired into an inner surface and an outer ring according to the size of the surface to be repaired, wherein the outer ring is arranged around the inner surface, the inner surface is divided into a plurality of strips along the water flow direction, the plurality of strips are arranged into I-sequence strips and II-sequence strips at intervals, and the outer ring is arranged into III-sequence strips;
s2, repairing an I-sequence strip: taking the II-sequence strips or the III-sequence strips to be repaired as an operation platform, removing the damaged surface concrete at the positions of the I-sequence strips to form I-sequence grooves to be repaired, building mortar walls on the II-sequence strips or the III-sequence strips on two sides of the I-sequence grooves to be repaired along the edges of the I-sequence grooves to be repaired, and carrying out ultra-high performance concrete pouring construction in the I-sequence grooves to be repaired;
s3, repairing a band in the II sequence: after the ultrahigh-performance concrete in the I-order groove to be repaired is condensed, removing the damaged surface concrete at the position of the II-order strip by taking the repaired I-order strip or the repaired III-order strip as an operation platform to form a II-order groove to be repaired, building a mortar wall on the III-order strip on one side of the II-order groove to be repaired along the edge of the II-order groove to be repaired, and carrying out ultrahigh-performance concrete pouring construction in the II-order groove to be repaired;
s4, repairing the III-sequence strip: after the ultrahigh-performance concrete in the second-order groove to be repaired is condensed, the repaired first-order strip or second-order strip is taken as an operation platform, the damaged surface concrete at the position of the third-order strip is removed to form a third-order groove to be repaired, a mortar wall is built on the ground outside the third-order groove to be repaired along the edge of the third-order groove to be repaired, and the ultrahigh-performance concrete is poured in the third-order groove to be repaired.
2. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to claim 1, wherein: in step S1, the width of each of the plurality of bands is set to 1.5m to 2.0 m.
3. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to claim 1, wherein: in the steps S2, S3 and S4, the width of the mortar wall is set to be 5 cm-10 cm.
4. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to claim 1, wherein: in the steps S2, S3 and S4, a plurality of mortar walls are all set to be level in height.
5. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to claim 1, wherein: in the steps S2, S3 and S4, the leveling, vibrating and plastering construction is performed after the ultra-high performance concrete pouring construction.
6. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to claim 5, wherein: and before the plastering construction, scraping the ultra-high performance concrete to be flush with the top surface of the mortar wall.
7. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to claim 1, wherein: the mortar of the mortar wall has a mortar-to-sand ratio of 1:3 to 1: 2.
8. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to claim 1, wherein: and reinforcing meshes or connecting anchor bars are arranged in the I-order groove to be supplemented, the II-order groove to be supplemented and the III-order groove to be supplemented.
9. The method for repairing a gentle slope water release building surface with ultra-high performance concrete according to any one of claims 1-8, wherein: in step S1, the inner surface is divided into equal number of first-order bands and second-order bands.
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| CN202011145828.8A CN112392011B (en) | 2020-10-23 | 2020-10-23 | Method for repairing gentle slope water release building surface by using ultra-high performance concrete |
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| CN202011145828.8A CN112392011B (en) | 2020-10-23 | 2020-10-23 | Method for repairing gentle slope water release building surface by using ultra-high performance concrete |
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| CN112392011B (en) | 2021-07-13 |
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