阅读说明：本技术 超高性能混凝土修补大面积陡坡泄水建筑物过流面的方法 (Method for repairing large-area steep slope water outlet building overflow surface by using ultrahigh-performance concrete ) 是由 汪永剑 唐圣斌 周乔林 于 2020-11-10 设计创作，主要内容包括：本发明公开了超高性能混凝土修补大面积陡坡泄水建筑物过流面的方法,主要包括施工准备、基柱固定、安装支架、超高性能混凝土浇筑四个步骤。该超高性能混凝土修补大面积陡坡泄水建筑物过流面的方法通过分段式结构进行安装,整体结构设置双层,通过该超高性能混凝土工形梁固定,再将超高性能混凝土面板固定连接在该超高性能混凝土工形梁上,内侧形成浇注仓,往浇注仓内浇注超高性能混凝土形成超高性能混凝土填充层,提供了一种结构合理、安装简易、安装效率高且成本低的超高性能混凝土修补大面积陡坡泄水建筑物过流面的方法。(The invention discloses a method for repairing a large-area steep slope water outlet building overflow surface by using ultrahigh-performance concrete. The method for repairing the large-area steep slope water outlet building overflow surface by using the ultrahigh-performance concrete is characterized in that the method is installed by using a sectional structure, the whole structure is provided with double layers, the ultrahigh-performance concrete beam is fixed, the ultrahigh-performance concrete panel is fixedly connected to the ultrahigh-performance concrete beam, a pouring bin is formed on the inner side of the ultrahigh-performance concrete beam, and ultrahigh-performance concrete is poured into the pouring bin to form an ultrahigh-performance concrete filling layer.)

1. The method for repairing the overflow surface of the large-area steep slope water outlet building by using the ultrahigh-performance concrete is characterized by comprising the following steps of:

s1, construction preparation: removing damaged concrete, forming a surface to be repaired at a depth reaching the design requirement, completely removing loose concrete and scum on the surface to be repaired, prefabricating the ultra-high performance concrete beam and the ultra-high performance concrete panel, and arranging a fixing hole site on a lower wing plate of the ultra-high performance concrete beam;

s2, fixing a base column: determining the arrangement distance of the ultra-high performance concrete beams and the fixing hole positions of the lower wing plates of the ultra-high performance concrete beams according to the overflowing surface of the drainage building to be repaired, and burying a plurality of foundation columns on the surface to be repaired according to the fixing hole positions;

s3, mounting bracket: installing the ultra-high performance concrete beam, realizing positioning through a foundation column for assembly, fixing the foundation column by using a fastener after the foundation column passes through a fixing hole position of the ultra-high performance concrete beam, and then installing an ultra-high performance concrete panel along the direction of the water flow along the surface to be supplemented from bottom to top, fixedly connecting the ultra-high performance concrete panel to the ultra-high performance concrete beam, wherein the inner side of the ultra-high performance concrete beam forms a pouring bin;

s4, pouring the ultra-high performance concrete: and pouring the ultra-high performance concrete into the pouring bin to form an ultra-high performance concrete filling layer, and sealing the connecting gap by pouring the ultra-high performance concrete.

2. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 1, wherein the method comprises the following steps: in the step S1, the thickness of the concrete to be repaired on the overflow surface of the structure to be repaired is measured, and then the height of the ultra-high performance concrete i-shaped beam is determined, wherein the height of the ultra-high performance concrete i-shaped beam is 2cm lower than the thickness of the concrete to be repaired.

3. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 2, wherein the method comprises the following steps: the ultra-high performance concrete beam prefabricated in the step S1 comprises supporting bars, an upper wing plate and a lower wing plate, grooves are formed in two side faces of the prefabricated ultra-high performance concrete panel, the shape of each groove is matched with the outer contour of the upper wing plate, and the wall thickness of the upper end of each groove is 2 cm.

4. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 1, wherein the method comprises the following steps: the foundation column is a stud, the fastening piece is a nut, and the fixing hole is a threaded through hole.

5. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 1, wherein the method comprises the following steps: and the other two side surfaces of the ultra-high performance concrete panel are respectively provided with an upper end lug and a lower end lug, and the upper end lug is abutted against the lower end lug to communicate the two ends of the ultra-high performance concrete panel.

6. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 5, wherein the method comprises the following steps: the length of the lower end lug is greater than that of the upper end lug, a decorative seam is formed between the upper end lug and the lower end lug, a first ultrahigh-performance concrete decorative strip is arranged in the decorative seam, and adjacent ultrahigh-performance concrete panels are fixedly connected through the first ultrahigh-performance concrete decorative strip to form a section panel.

7. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 6, wherein the method comprises the following steps: the width of the decorative seam is set to be 2-5 cm.

8. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 6, wherein the method comprises the following steps: pouring openings are formed among the segment panels at intervals, second ultrahigh-performance concrete decoration strips are arranged at the pouring openings, and the adjacent segment panels are fixedly connected through the second ultrahigh-performance concrete decoration strips.

9. The method for repairing the flow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in claim 1, wherein the method comprises the following steps: and a reinforcing mesh or a reinforcing bar is arranged in the ultra-high performance concrete filling layer in the step S4.

10. The method for repairing the overflow surface of a large-area steep slope water outlet building by using the ultra-high performance concrete as claimed in any one of claims 1 to 9, wherein: and S4, scraping the first and second ultra-high performance concrete decorative strips to be flush with the ultra-high performance concrete panel, and then compacting and plastering.

Technical Field

The invention relates to the field of hydraulic engineering maintenance, in particular to a method for repairing a large-area steep slope water outlet building overflow surface 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 ultra-high performance concrete is adopted to repair the abraded or seriously hollow reinforced concrete structure overflow surface, has strong abrasion and impact resistance, good durability and high cost performance, and can overcome the defects of the materials. However, because the fluidity of the ultra-high performance concrete is extremely high, when the ultra-high performance concrete is used for repairing the steep slope of the water conservancy project water release structure and the flow surface, a template needs to be installed to limit the over-range flow of the concrete, and the purpose of forming the concrete according to the structural size required by design is achieved. When a wooden template or a steel template is adopted, tie bars can be embedded in the steep slope overflow surface of the water release structure and penetrate through the template, the template is internally pulled and reinforced, the template is removed after the repair is finished, in order to prevent concrete on the overflow surface of the structure of the water release structure from being cracked and damaged due to corrosion and expansion of an exposed tie bar head, a small pit needs to be chiseled at the overflow surface part of the structure with the exposed tie bars, the tie bars are cut along the bottom of the pit, and the small pit is leveled by mortar; however, the method for repairing the overflow surface of the structure of the water outlet structure is slow in speed, the repaired overflow surface of the water outlet structure is poor in appearance quality, and mortar for repairing the small pits is easy to flush out by high-speed water flow, so that potential quality hazards are left.

Disclosure of Invention

The invention aims to provide a method for repairing the large-area steep slope water outlet building overflow surface by using ultra-high performance concrete, which is convenient for repairing the large-area steep slope water outlet building overflow surface.

The technical scheme adopted by the invention is as follows: the method for repairing the overflow surface of the large-area steep slope water outlet building by using the ultra-high performance concrete comprises the following steps:

s1, construction preparation: removing damaged concrete, forming a surface to be repaired at a depth reaching the design requirement, completely removing loose concrete and scum on the surface to be repaired, prefabricating the ultra-high performance concrete beam and the ultra-high performance concrete panel, and arranging a fixing hole site on a lower wing plate of the ultra-high performance concrete beam;

s2, fixing a base column: determining the arrangement distance of the ultra-high performance concrete beams and the fixing hole positions of the lower wing plates of the ultra-high performance concrete beams according to the overflowing surface of the drainage building to be repaired, and burying a plurality of foundation columns on the surface to be repaired according to the fixing hole positions;

s3, mounting bracket: installing the ultra-high performance concrete beam, realizing positioning through a foundation column for assembly, fixing the foundation column by using a fastener after the foundation column passes through a fixing hole position of the ultra-high performance concrete beam, and then installing an ultra-high performance concrete panel along the direction of the water flow along the surface to be supplemented from bottom to top, fixedly connecting the ultra-high performance concrete panel to the ultra-high performance concrete beam, wherein the inner side of the ultra-high performance concrete beam forms a pouring bin;

s4, pouring the ultra-high performance concrete: and pouring the ultra-high performance concrete into the pouring bin to form an ultra-high performance concrete filling layer, and sealing the connecting gap by pouring the ultra-high performance concrete.

Has the advantages that: the method for repairing the large-area steep slope water outlet building overflow surface by using the ultrahigh-performance concrete is characterized in that the method is installed by using a sectional structure, the whole structure is provided with double layers, the ultrahigh-performance concrete beam is fixed, the ultrahigh-performance concrete panel is fixedly connected to the ultrahigh-performance concrete beam, a pouring bin is formed on the inner side of the ultrahigh-performance concrete beam, and ultrahigh-performance concrete is poured into the pouring bin to form an ultrahigh-performance concrete filling layer.

Further, in the step S1, the thickness of the concrete to be repaired on the overflow surface of the drainage structure to be repaired is measured, and then the height of the ultra-high performance concrete i-shaped beam is determined, wherein the height of the ultra-high performance concrete i-shaped beam is 2cm lower than the thickness of the concrete to be repaired.

Further, the ultra-high performance concrete joist prefabricated in the step S1 includes a support bar, an upper wing plate and a lower wing plate, both side surfaces of the prefabricated ultra-high performance concrete panel are provided with grooves, the shape of the groove is adapted to the outer contour of the upper wing plate, and the wall thickness of the upper end of the groove is set to be 2 cm.

Furthermore, the foundation column is a stud, the fastening piece is a nut, and the fixing hole is a threaded through hole.

Furthermore, the other two side surfaces of the ultra-high performance concrete panel are respectively provided with an upper end lug and a lower end lug, and the upper end lug is abutted against the lower end lug to communicate the two ends of the ultra-high performance concrete panel.

Furthermore, the length of the lower end bump is greater than that of the upper end bump, a decoration seam is formed between the upper end bump and the lower end bump, a first ultrahigh-performance concrete decoration strip is arranged in the decoration seam, and the adjacent ultrahigh-performance concrete panels are fixedly connected through the first ultrahigh-performance concrete decoration strip to form a section panel.

Further, the width of the decorative seam is set to be 2-5 cm.

Furthermore, pouring openings are formed among the section panels at intervals, second ultrahigh-performance concrete decoration strips are arranged at the pouring openings, and the adjacent section panels are fixedly connected through the second ultrahigh-performance concrete decoration strips.

Further, a reinforcing mesh or a reinforcing bar is arranged in the ultra-high performance concrete filling layer in the step S4.

Further, after the step S4, the first ultra-high performance concrete trim strip and the second ultra-high performance concrete trim strip are scraped to be flush with the ultra-high performance concrete panel, and then compacted and plastered.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a construction flow chart of an embodiment of the present invention;

FIG. 2 is a transverse cross-sectional view of the overall structure of an embodiment of the present invention;

FIG. 3 is a vertical rendering of the overall structure of an embodiment of the present invention;

fig. 4 is a connection diagram of an ultra high performance concrete panel according to an 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 4, the invention provides a method for repairing a large-area steep slope water outlet building overflow surface by using ultra-high performance concrete, which mainly comprises the following steps:

s1, construction preparation: removing damaged concrete, forming a surface to be repaired 4 at a depth reaching the design requirement, completely removing loose concrete and scum on the surface to be repaired 4, prefabricating an ultra-high performance concrete joist 1 and an ultra-high performance concrete panel 2, and arranging a fixing hole position on a lower wing plate of the ultra-high performance concrete joist 1;

s2, fixing a base column: determining the arrangement distance of the ultra-high performance concrete beams 1 and the fixing hole positions of the lower wing plates of the ultra-high performance concrete beams 1 according to the overflowing surface of the drainage building to be repaired, and burying a plurality of foundation columns 5 on the surface 4 to be repaired according to the fixing hole positions;

s3, mounting bracket: installing the ultra-high performance concrete joist 1, realizing positioning and assembling through a foundation column 5, fixing the foundation column 5 after penetrating through a fixing hole position of the ultra-high performance concrete joist 1 by using a fastener, and then installing an ultra-high performance concrete panel 2 along the water flow direction of a surface to be supplemented 4 from bottom to top, fixedly connecting the ultra-high performance concrete panel 2 to the ultra-high performance concrete joist 1, and forming a pouring bin at the inner side;

s4, pouring the ultra-high performance concrete: and pouring the ultra-high performance concrete into the pouring bin to form the ultra-high performance concrete filling layer 3, and sealing the connecting gap by pouring the ultra-high performance concrete.

The method for repairing the overflow surface of the large-area steep slope water outlet building by using the ultrahigh-performance concrete is characterized in that the method is installed by using a sectional structure, the whole structure is provided with double layers, the ultrahigh-performance concrete beam 1 is fixed, the ultrahigh-performance concrete panel 2 is fixedly connected to the ultrahigh-performance concrete beam 1, a pouring bin is formed on the inner side of the ultrahigh-performance concrete beam, and ultrahigh-performance concrete is poured into the pouring bin to form an ultrahigh-performance concrete filling layer 3.

Preferably, in step S1, the thickness of the concrete to be repaired on the overflow surface of the drainage structure to be repaired is measured, and the height of the ultra-high performance concrete structural beam 1 is determined, wherein the height of the ultra-high performance concrete structural beam 1 is 2cm lower than the thickness of the concrete to be repaired. The ultra-high performance concrete joist 1 is lower than the thickness of the concrete to be repaired, so that after the ultra-high performance concrete panel 2 is installed, the ultra-high performance concrete joist 1 can be completely embedded in the ultra-high performance concrete, and the overall strength is increased.

Preferably, the ultra-high performance concrete joist 1 prefabricated in step S1 includes a supporting bar, an upper wing plate and a lower wing plate, both side surfaces of the prefabricated ultra-high performance concrete panel 2 are provided with grooves, the shape of the groove is adapted to the outer contour of the upper wing plate, and the wall thickness of the upper end of the groove is set to be 2 cm. The grooves at the two ends of the ultra-high performance concrete panel 2 can be clamped between the upper wing plates of the adjacent ultra-high performance concrete beams, and the ultra-high performance concrete panel 2 is used as a disassembly-free forming template and is connected in a sectional manner, so that the large-area surface to be repaired 4 can be repaired in sections, the whole structure is compact, and the installation is easy and the installation efficiency is high. The upper end wall thickness of the groove is set to be 2cm, so that the height of the top surface of the ultra-high performance concrete panel 2 is equal to the height of the overflow surface.

Preferably, the base pillar 5 is a stud, the fastener is a nut, and the fixing hole is a threaded through hole. Firstly fixing a stud on a surface 4 to be repaired, pre-forming a threaded hole on a lower wing plate of the ultra-high performance concrete beam 1, penetrating the ultra-high performance concrete beam 1 into the stud, and screwing a nut so as to fix the ultra-high performance concrete beam 1. The connecting structure is simple in structure and high in mounting efficiency by connecting the stud and the nut.

Preferably, the other two side surfaces of the ultra-high performance concrete panel 2 are respectively provided with an upper end bump and a lower end bump, and the upper end bump abuts against the lower end bump to communicate the two ends of the ultra-high performance concrete panel 2. The adjacent ultra-high performance concrete panels 2 are connected in a layer-by-layer mode through the arrangement of the upper end convex blocks and the lower end convex blocks, assembling stability is improved, and assembling is facilitated.

Preferably, the length of the lower end bump is greater than that of the upper end bump, so that a gap is left between the upper end bump and the lower end bump to form a decorative seam, the decorative seam is filled with ultra-high performance concrete to form a first ultra-high performance concrete decorative strip 6, and the adjacent ultra-high performance concrete panels 2 are fixedly connected through the first ultra-high performance concrete decorative strip 6 to form a segmental panel. Through the sectional design, the method for repairing the large-area steep slope water outlet building overflow surface by using the ultrahigh-performance concrete can be constructed in sections, and the first ultrahigh-performance concrete decorative strip 6 seals the decorative joint, so that the impact strength of the integral structure is improved, and the decorative effect is also achieved.

Preferably, the width of the decorative seam is set to be 2-5 cm. Through set up first ultra high performance concrete ornamental strip 6 in decorating the seam, not only improved whole leakproofness and impact strength, can also play pleasing to the eye decoration effect through the first ultra high performance concrete ornamental strip 6 that sets up different colour patterns, because the width overlength of decorating the seam can influence overall structure waterproof nature and impact strength, this application will decorate the seam width and set up in reasonable interval, has both improved whole steadiness and has played decorative effect again.

Preferably, pouring openings are formed between the panel sections at intervals, second ultrahigh-performance concrete decoration strips 7 are arranged at the pouring openings, and the adjacent panel sections are fixedly connected through the second ultrahigh-performance concrete decoration strips 7. A pouring bin is formed among the panel sections, the ultra-high performance concrete joist 1 and the surface 4 to be repaired, a pouring gate is arranged among the panel sections, the repairing is carried out from bottom to top along the water flow direction of the surface 4 to be repaired, the ultra-high performance concrete is filled into the pouring bin to form an ultra-high performance concrete filling layer 3, a second ultra-high performance concrete decoration strip 7 is arranged at the pouring gate to seal the pouring gate, the impact strength of the integral structure is improved, and the decoration effect is also achieved. The ultra-high performance concrete structure beam 1 is fixed, then the ultra-high performance concrete panels 2 are connected to the ultra-high performance concrete structure beam 1 through a clamping structure, adjacent ultra-high performance concrete panels 2 are abutted layer by layer to form segment panels, a pouring bin is formed on the inner side of each segment panel, a pouring opening is reserved between the adjacent segment panels, ultra-high performance concrete is poured through the pouring opening to form an ultra-high performance concrete filling layer 3, a double-layer structure is formed, and the method for repairing the large-area steep slope water drainage building overflow surface by the ultra-high performance concrete with reasonable structure, simple installation, high efficiency and low cost is provided.

Preferably, in the step S4, a reinforcing mesh or a reinforcing bar is provided in the ultra-high performance concrete filling layer 3, so that the overall strength is improved and the service life is prolonged by providing the reinforcing mesh or the reinforcing bar.

Preferably, after the step S4, the first ultra-high performance concrete trim strip 6 and the second ultra-high performance concrete trim strip 7 are scraped to be flush with the ultra-high performance concrete panel 2, and then compacted and plastered. Specifically, the ultra-high performance concrete is compacted and plastered by iron or wood plastering, so that a smooth steep slope is formed, and the integral attractiveness is improved.

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.