CN113897909B - Construction method of expansion reinforcing band connecting structure in complex arc-shaped water channel - Google Patents
Construction method of expansion reinforcing band connecting structure in complex arc-shaped water channel Download PDFInfo
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- CN113897909B CN113897909B CN202111041292.XA CN202111041292A CN113897909B CN 113897909 B CN113897909 B CN 113897909B CN 202111041292 A CN202111041292 A CN 202111041292A CN 113897909 B CN113897909 B CN 113897909B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63G—MERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT
- A63G21/00—Chutes; Helter-skelters
- A63G21/18—Water-chutes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a construction method of an expansion reinforcing belt connecting structure in a complex arc-shaped water channel, wherein the connecting structure comprises an arc-shaped water channel, a water channel platform connected to the starting end of the arc-shaped water channel and a water channel lifting area connected to the process section of the water channel; intermittent seam reinforcing belts, continuous reinforcing belts and reserved grooves are arranged on the arc-shaped water channel at intervals. During construction, the water channel is divided into zones, so that the method is beneficial to the zone construction on one hand, and is convenient to determine the positions of the construction joints and the reinforcing belts on the other hand, thereby ensuring the construction progress and quality; by the targeted design of concrete in the water channel, the accurate control of procedures such as cushion layer and measurement in construction, and the like, the expansion agent and the osmotic crystallization are added into the water channel integrally, so that the high-quality construction of the water channel is facilitated; by the specific design of concrete in different types of reinforcing belts and the determination of construction positions and connection forms, construction modes, procedures and connection structures are determined, and high-quality construction can be performed on water channel unconnected nodes in a classified manner.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method of an expansion reinforcing band connecting structure in a complex arc-shaped water channel.
Background
Due to the increasing popularity of entertainment facilities, water channels are often provided in large theme parks and amusement parks for guests to play. The construction of complex and overlong cast-in-place concrete in a water channel generally adopts the common method that a temperature/telescopic post-cast strip is arranged to reduce cracks, and the sealing waiting time of the post-cast strip is longer (the retention time of the post-cast strip is not less than 1 month generally). The project such as a riding water channel of a theme park project, a large-scale electronic factory and the like has very tight construction period, the subsequent process development is often restricted by the sealing of the post-pouring belt, the expansion reinforcing belt of the invention is adopted to replace the conventional post-pouring belt method, the construction period can be greatly shortened while the generation of cracks is reduced, and considerable economic benefits can be brought to the project. Because the slenderness ratio of structures such as an overlong water channel, a factory building and the like is larger, the possibility of cracking of concrete due to the influence of temperature is increased, and the construction quality and the construction period are also influenced by the construction of a water channel body in a complex overlong water channel.
Disclosure of Invention
The invention provides a construction method of an expansion reinforcing band connecting structure in a complex arc-shaped water channel, which is used for solving the technical problems of water channel division, water channel specific construction, construction joint and reinforcing section arrangement and the like in an overlong complex water channel.
In order to realize the purpose, the invention adopts the following technical scheme:
a construction method of an expansion reinforcing band connecting structure in a complex arc-shaped water channel comprises the following steps that the connecting structure comprises an arc-shaped water channel, a water channel platform connected to the starting end of the arc-shaped water channel and a water channel lifting area connected to the process section of the water channel; intermittent seam reinforcing belts, continuous reinforcing belts and reserved grooves are arranged on the water channel at intervals;
the intermittent joint reinforcing belt comprises intermittent reinforced concrete poured at the construction joint, an intermittent reinforced water stop plate and an expansion water stop strip which are connected in the intermittent reinforced concrete, and an intermittent reinforced reinforcing mesh arranged between the intermittent reinforced concrete and the water channel;
the continuous reinforcing belt comprises continuous reinforced concrete poured at the subsection and a continuous reinforcing mesh arranged between the continuous reinforced concrete and the water channel;
the construction method of the connecting structure comprises the following specific steps:
the method comprises the following steps that firstly, according to a design deepening drawing, a water channel is partitioned, wherein the water channel comprises a straight line area, an arc area and an intersection area, and the intersection area comprises the joint of the water channel and a water channel platform and a water channel lifting area, the joint of two or more water channels and the joint of the straight line area and the arc line area;
step two, a construction joint is arranged at the intersection region, an intermittent joint reinforcing band is arranged at the construction joint, and intermittent reinforced concrete filled in the intermittent joint reinforcing band contains 10-12% of an expanding agent;
step three, arranging continuous reinforcing belts in the long straight line section in the straight line area at intervals, and arranging the continuous reinforcing belts at the connection part of two arc line sections with opposite openings in the arc area; the continuous reinforced concrete filled in the continuous reinforcing belt contains 10-12% of an expanding agent;
step four, during site construction, doping osmotic crystals and an expanding agent into concrete of the water channel, wherein the doping amount of the expanding agent is 6-8%;
a reserved groove is arranged at the position of the intermittent seam reinforcing belt and on the long-distance water channel at intervals, and an expansion water stop strip is correspondingly arranged on the reserved groove;
step five, when the concrete is constructed for multiple times, the intermittent joint reinforcing band is cast after the first section of concrete is cast, the second section of concrete is cast firstly and then the intermittent joint reinforcing band is cast during the second casting, and chiseling, cleaning and moistening treatment are required to be carried out on the construction joint in contact with the first section;
when the continuous reinforcing belt is constructed, concrete with strength higher than that of the water channel is used for the continuous reinforcing belt, the concrete on two sides of the continuous reinforcing belt is poured in advance at the same time, and then the continuous reinforcing belt is directly poured.
Further, in the second step, the width of the intermittent seam reinforcing belt is not less than 2m, after two sections of water channels are poured, an intermittent reinforced water stop plate is arranged on a concrete interface which is poured for the first time, and the intermittent reinforced water stop plate is fixed on a steel bar framework in the concrete; intermittent reinforcing steel bar meshes are arranged in advance at the concrete section positions poured on the two sides of the intermittent seam reinforcing belts; during the second pouring, pouring intermittent reinforced concrete doped with 10-12% of expanding agent and permeable crystals, and then continuously pouring the permeable crystal concrete doped in the water channel; at this time, the strength of the intermittently reinforced concrete is guaranteed to be one grade higher than that of the permeable crystalline concrete of the water channel.
Furthermore, in the third step, when the water channel with the length of more than 30m is poured at one time, the continuous reinforcing belt is arranged in the middle of the length of the pouring at one time, the length of the continuous reinforcing belt is not less than 2m, and concrete is continuously poured until the designed construction joint is poured at one time.
Furthermore, before the second pouring, the concrete surface laitance of the water channel is removed, then a surface interface agent is brushed, an expansion water stop strip is fixed in a reserved groove at the interface of the intermittent reinforced water stop plate and the concrete by a steel nail, and then the concrete pouring of the water channel is carried out; after the concrete of the water channel is poured to reach the designed strength, coating a permeable crystalline coating in the range of 300mm by taking the construction joint as the center;
the treatment of the horizontal construction joint on the side wall of the water channel is similar to that of the vertical construction joint, the floating slurry on the surface of concrete is chiseled before the second pouring, the surface interface agent is brushed, the expansion water stop strip is fixed in the preformed groove by a steel nail, and then the concrete pouring is carried out; and after the pouring is finished and the concrete reaches the designed strength, coating a permeable crystalline coating in the range of 300mm by taking the construction joint as the center on the inner surface and the outer surface of the side wall.
Furthermore, the water channel comprises water channel side walls at two sides and a water channel bottom plate connected to the bottoms of the water channel side walls, the water channel side walls and the water channel bottom plate are U-shaped, and the water channel is divided into one layer, two layers or multiple layers; and the concrete of the support wall positioned at the lower part of the water channel of the second layer is poured to the bottom of the beam or the slab at one time and is 2-3cm higher than the bottom of the beam or the slab.
Further, the cross section of the water channel is poured for 2-5 times from bottom to top, a plurality of horizontal construction joints are arranged, the longitudinally distributed reinforcing steel bars of the cantilever plates are secondarily bound at the positions of the side walls of the water channel of the local water channel after the concrete on the lower side of the cantilever plates is poured, and then the construction of secondary pouring of the concrete of the cantilever plates is carried out.
Furthermore, the center line of the water channel is taken as a standard for measurement, control piles are nailed on extension lines of the center line of each section, 4-5 control sections are arranged in the arc length direction of the water channel, and the length of the arc line at the outermost side of the distance is not more than 5 m; the control point of the external wall template is 500mm in the arc length direction, and the groove template is 2.5m in length according to the whole template assembly; and arranging a pair of elevation control points on the reserved steel bars for every 5m of the straight line section and every 1.5-3 m of the arc section so as to control the control module and complete the elevation of the surface.
Furthermore, a concrete cushion layer is arranged at the lower part of the water channel bottom plate, and a steel wire mesh is arranged in the cushion layer; the cushion layer is at least 150mm thick, the width of the cushion layer is supported corresponding to the inclined strut of the template, and the width of the cushion layer is equal to the width of the water channel and is widened to two sides by 1.5m respectively; the flatness of the cushion layer is controlled within 3mm/2m, and before the cushion layer is poured, the pre-buried and reserved lengths of the electromechanical pipelines in the lower projection area are finished by paving the cushion layer in consideration of the range of the cushion layer; the reinforcing steel bars in the water channel adopt HRB 400-grade reinforcing steel bars, and the strength standard value has the strength guarantee rate of not less than 95%; the steel bar protective layer is 40mm, and the steel bar protective layer at the local position sensor and the cantilever plate is 25 mm.
Furthermore, the water channel is prepared by using premixed concrete and doping an anti-seepage crystallization additive; the maximum grain size in the concrete should not exceed 1/4, which is the smallest dimension of the section of the member, and should not exceed 3/4, which is the smallest net spacing of the reinforcing bars; the maximum grain diameter of the solid concrete slab is not more than 1/3 of the slab thickness and is not more than 40 mm; the particle size of the concrete aggregate poured at the last time is not more than 13mm, and more than part of the aggregate needs to be screened out.
Furthermore, the concrete with C30 as coarse aggregate in the concrete of the water channel has a mud content of not more than 1.0 percent and a mud block content of not more than 0.5 percent; the content of the mud in the concrete with C25 and below is not more than 2.0 percent, and the content of the mud blocks is not more than 0.7 percent; selecting medium sand as fine aggregate, wherein the content of chloride ions is not more than 0.06 percent calculated according to the mass percent of dry sand; cement: selecting common Portland cement to reduce hydration heat; when the alkali active aggregate is used, the alkali content (calculated by equivalent sodium oxide) brought by the admixture is not required to exceed 1.0kg/m for carrying out the cultivation; and (5) carrying out dry distillation on the concrete under the condition that the total alkali content of the concrete is not more than 0.3 kg/m.
The invention has the beneficial effects that:
1) by dividing the water channel into zones, the invention is beneficial to zone construction on one hand and is convenient to determine the positions of the construction joints and the reinforcing belts on the other hand, thereby ensuring the construction progress and quality;
2) according to the invention, through the targeted design of concrete in the water channel, the accurate control of procedures such as cushion layer and measurement in construction, and the like, and the whole expansion agent and the osmotic crystallization are added in the water channel, so that the high-quality construction of the water channel is facilitated;
3) the construction method, the construction process and the connection structure are determined by the specific design of the concrete in the reinforcing belts of different types and the determination of the construction position and the connection form, so that the high-quality construction of the unconnected nodes of the water channel can be performed in a classified manner;
additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic view of the overall construction of a complex arc-shaped water channel;
FIG. 2 is a schematic view of the overall construction of a partially complex arc-shaped water channel;
FIG. 3 is a schematic side view of an intermittent seam reinforcing belt;
FIG. 4 is a schematic cross-sectional construction view of an intermittent seam reinforcing belt;
FIG. 5 is a schematic side view of a continuous reinforcing strip;
FIG. 6 is a schematic cross-sectional view of a continuous reinforcing belt;
fig. 7 is a schematic view of the connection position of the expansion water stop.
Reference numerals 1-water channel, 11-water channel side wall, 12-water channel bottom plate, 2-water channel platform, 3-water channel lifting area, 4-intermittent seam reinforcing band, 41-intermittent reinforced concrete, 42-intermittent reinforced water stop plate, 43-intermittent reinforced steel bar net, 5-continuous reinforced band, 51-continuous reinforced concrete, 52-continuous reinforced steel bar net, 6-preformed groove and 7-expansion water stop strip.
Detailed Description
Taking a pleasure boat riding water channel of a certain global movie city as an example, the pleasure boat riding water channel has the main functions of a closed-loop water channel for unidirectional running of a special pleasure boat, the route meanders, and the middle of the water channel is also provided with stages of lifting, revolving, advancing and diving of the pleasure boat, so that the design is very complex.
The waterway loop is structurally divided into 6 sections, and comprises: the system comprises a standing platform area (L & lt 36 m), a water channel 1 (L & lt 127 m), a water channel lifting section (comprising a lifting section main body and an east circulating water tank) (L & lt 33 m), wherein the water channel comprises an upper layer water channel, a lower layer water channel and east and west circulating water tank connecting pipe ditches, L & lt 51m +44m, a water channel descending section also comprises a descending section main body, a west circulating water tank, a lagoon and a section of rotary water channel, the total length L & lt 83m, a water channel gate (L & lt 75 m. besides a water channel loop, an overhaul area, an upper layer and a lower layer of structures, the upper layer is a rotary advancing water channel of a pleasure boat and is integrated with a beam plate of a peripheral scene platform, and the lower layer is a circulating water channel and is mainly used for bearing circulating water.
Referring to fig. 1 to 6, a construction method of an expansion reinforcement belt connection structure in a complex arc-shaped water channel includes an arc-shaped water channel 1, a water channel platform 2 connected to a start end of the arc-shaped water channel 1, and a water channel lifting area 3 connected to a process section of the water channel 1; intermittent seam reinforcing bands 4, expansion water stop strips 7, continuous reinforcing bands 5 and reserved grooves 6 are arranged on the water channel 1 at intervals.
The intermittent joint reinforcing band 4 includes an intermittent reinforced concrete 41 poured at the construction joint, an intermittent water stop reinforcing plate 42 connected to the intermittent reinforced concrete 41, and an intermittent reinforcing mesh reinforcing layer 43 provided between the intermittent reinforced concrete 41 and the waterway 1. The continuous reinforcing band 5 comprises continuous reinforced concrete 51 poured at the subsection and a continuous reinforcing mesh 52 arranged between the continuous reinforced concrete 51 and the water channel 1; the continuous reinforcing mesh reinforcements 52 are arranged in advance at the concrete section poured on both sides of the continuous reinforcing belt 5.
With reference to fig. 1 to 7, a construction method of an expansion reinforcing band connection structure in a complex arc-shaped water channel is further described, which comprises the following specific steps:
the method comprises the steps that firstly, according to a design deepening drawing, a water channel 1 is partitioned, wherein the partition comprises a straight line area, an arc area and an intersection area, and the intersection area comprises the joint of the water channel 1 and a water channel platform 2 and a water channel lifting area 3, the joint of two or more water channels 1 and the joint of the straight line area and the arc line area. The total length of the riding water channel 1 in the project reaches 450 meters, and the riding water channel is a continuous annular water channel 1 cast-in-situ structure, and is provided with 17 expansion reinforcing belts, wherein 13 expansion reinforcing belts are intermittent, and 4 expansion reinforcing belts are continuous.
Wherein, during construction, the water channel 1 is prepared by mixing ready-mixed concrete and doping anti-seepage crystallization admixture; the maximum grain size in the concrete should not exceed 1/4, which is the smallest dimension of the section of the member, and should not exceed 3/4, which is the smallest net spacing of the reinforcing bars; the maximum grain diameter of the solid concrete slab is not more than 1/3 of the slab thickness and is not more than 40 mm; the particle size of the aggregate of the concrete poured for the last time is not more than 13mm, and the aggregate needs to be screened out more than part.
The mud content of the concrete with C30 coarse aggregate in the concrete of the water channel 1 is not more than 1.0 percent, and the mud block content is not more than 0.5 percent; the content of the mud in the concrete with C25 and below is not more than 2.0 percent, and the content of the mud blocks is not more than 0.7 percent; selecting medium sand as the fine aggregate, wherein the content of chloride ions is not more than 0.06 percent calculated according to the mass percentage of dry sand; cement: ordinary portland cement is selected to reduce hydration heat; when the alkali active aggregate is used, the alkali content brought by the admixture is not more than 1.0kg/m in terms of equivalent sodium oxide; and (5) carrying out dry distillation on the concrete under the condition that the total alkali content of the concrete is not more than 0.3 kg/m.
In addition, a concrete cushion layer is arranged at the lower part of the water channel bottom plate 12, and a steel wire mesh is arranged in the cushion layer; the cushion layer is at least 150mm thick, the width of the cushion layer is supported corresponding to the inclined strut of the template and is equal to the width of the water channel 1, and the width of the cushion layer is widened to two sides by 1.5 m; the flatness of the cushion layer is controlled within 3mm/2m, and before the cushion layer is poured, the range of the cushion layer is considered and the cushion layer is paved by pre-embedding and reserving the lengths of the electromechanical pipelines in the lower projection area; the steel bars in the water channel 1 are HRB 400-grade steel bars, and the strength standard value has a strength guarantee rate not less than 95%; the reinforcing bar protective layer is 40mm, and local position sensor, ram department reinforcing bar protective layer are 25 mm.
And step two, a construction joint is arranged at the intersection region, an intermittent joint reinforcing band 4 is arranged at the construction joint, and the intermittent reinforced concrete 41 filled in the intermittent joint reinforcing band 4 contains 10-12% of an expanding agent. In the second step, the width of the intermittent seam reinforcing belt is not less than 2m, after two sections of the water channel 1 are poured, an intermittent reinforced water stop plate 42 is arranged on a concrete interface of the first pouring, wherein the intermittent reinforced water stop plate 42 is fixed on a steel bar framework in the concrete; intermittent reinforcing steel bar meshes 43 are arranged at the concrete sections poured on the two sides of the intermittent seam reinforcing belt 4 in advance; during the second pouring, pouring the intermittent reinforced concrete 41 doped with 10-12% of the expanding agent and the permeable crystals, and then continuously pouring the permeable crystal concrete doped in the water channel 1; the strength of the intermittently reinforced concrete 41 is ensured to be higher than that of the penetrated crystalline concrete of the waterway 1 by one level.
Step three, arranging continuous reinforcing belts 5 in the long straight line section in the straight line area at intervals, and arranging the continuous reinforcing belts 5 at the connection part of two arc line sections with opposite openings in the arc area; the continuous reinforced concrete 51 filled in the continuous reinforcing belt 5 contains 10 to 12% of an expanding agent.
And in the third step, when the water channel 1 with the length of more than 30m is poured at one time, the continuous reinforcing belt 5 is arranged in the middle of the length of the one-time pouring, the length of the continuous reinforcing belt is not less than 2m, and concrete is continuously poured until the designed construction joint of the one-time pouring is reached.
In the embodiment, before the second pouring, the concrete surface laitance of the water channel 1 is removed, then the surface interface agent is brushed, the expansion water stop strip 7 is fixed by steel nails in the preformed groove 6 at the interface of the intermittent reinforced water stop plate 42 and the concrete, and then the concrete pouring of the water channel 1 is carried out; after the concrete of the water channel 1 reaches the designed strength, coating a permeable crystalline coating in the range of 300mm by taking the construction joint as the center.
Step four, during site construction, doping osmotic crystals and an expanding agent into the concrete of the water channel 1, wherein the doping amount of the expanding agent is 6-8%; and a reserve groove 6 is arranged at the intermittent seam reinforcing belt 4 and on the long-distance water channel 1 at intervals, and an expansion water stop strip 7 is correspondingly arranged on the reserve groove 6.
And step five, when the concrete is constructed in multiple times, the intermittent joint reinforcing belt 4 is cast after the first section of concrete is cast, the second section of concrete is cast firstly and then the intermittent joint reinforcing belt 4 is cast during the second casting, and chiseling, cleaning and moistening treatment are required to be carried out on the construction joint in contact with the first section.
When the continuous reinforcing band 5 is constructed, the continuous reinforcing band 5 uses concrete with a strength higher than that of the water channel 1, the concrete on two sides of the continuous reinforcing band 5 is simultaneously poured in advance, and then the continuous reinforcing band 5 is directly poured. In the embodiment, the treatment of the transverse construction joint on the water channel side wall 11 is similar to that of the vertical construction joint, the floating slurry on the concrete surface is chiseled before the second pouring, the surface interface agent is brushed, the expansion water stop strip 7 is fixed in the preformed groove 6 by a steel nail, and then the concrete pouring is carried out; and after the pouring is finished and the concrete reaches the designed strength, coating a permeable crystalline coating in the range of 300mm by taking the construction joint as the center on the inner surface and the outer surface of the side wall.
In the embodiment, the water channel 1 comprises water channel side walls 11 at two sides and a water channel bottom plate 12 connected to the bottom of the water channel side walls 11, the water channel side walls 11 and the water channel bottom plate 12 are U-shaped, and the water channel 1 is divided into one layer, two layers or multiple layers; and the support wall concrete at the lower part of the water channel 1 at the second layer is poured to the bottom of the beam or the plate at one time and is 2-3cm higher.
In the embodiment, the cross section of the water channel 1 is specially shaped, the cross section shapes of all sections are different on the basis of the main line cross section shape of the basic water channel 1, the widest water channel 1 structure is arranged at a lagoon, the width is 22.125m, and the narrowest basic water channel 1 structure is 3.5 m. The thickness of the bottom plate of the basic water channel 1 is 250-650 mm, the thickness of the middle part is 250mm, and the thickness of the two sides is 650 mm. The thickness of the basic wall of the water channel 1 is 250mm, and the local thickness is 800mm to 1050 mm; the height of the basic wall is 1m, and the height of the supporting wall at the lower part of the partial upper water channel 1 is 3.79 m. The junction at the intersection of two channels 1 is more complex. In addition, 1 or 2 layers of sandwich plates are arranged in the lifting area and the descending area.
During construction, pouring is carried out on the cross section of the water channel 1 from bottom to top for 2-5 times, a plurality of horizontal construction joints are arranged, after concrete is poured on the side wall 11 of the water channel of the local water channel 1 and on the lower side of the cantilever plate, secondary binding is carried out on longitudinally distributed reinforcing steel bars of the cantilever plate, and then construction of secondary pouring of the cantilever plate concrete is carried out.
In order to ensure the construction quality, the central line of the water channel 1 is taken as a standard for measurement, control piles are nailed on extension lines of the central line of each section, 4-5 control sections are arranged in the arc length direction of the water channel 1, and the length of an arc line at the outermost side of the distance is not more than 5 m; the control point of the external wall template is 500mm in the arc length direction, and the groove template is assembled into 2.5m points according to the whole template; and arranging a pair of elevation control points on the reserved steel bars for every 5m of the straight line section and every 1.5-3 m of the arc section so as to control the control module and complete the elevation of the surface.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (9)
1. A construction method of an expansion reinforcing band connecting structure in a complex arc-shaped water channel is characterized in that the connecting structure comprises an arc-shaped water channel (1), a water channel platform (2) connected to the starting end of the arc-shaped water channel (1), and a water channel lifting area (3) connected to the process section of the water channel (1); intermittent seam reinforcing bands (4), expansion water stop strips (7), continuous reinforcing bands (5) and reserved grooves (6) are arranged on the water channel (1) at intervals;
the intermittent joint reinforcing belt (4) comprises intermittent reinforced concrete (41) poured at a construction joint, an intermittent reinforced water stop plate (42) connected in the intermittent reinforced concrete (41), and an intermittent reinforced reinforcing mesh (43) arranged between the intermittent reinforced concrete (41) and the water channel (1);
the continuous reinforcing belt (5) comprises continuous reinforced concrete (51) poured at the subsection and a continuous reinforcing steel bar net (52) arranged between the continuous reinforced concrete (51) and the water channel (1);
the construction method of the connecting structure comprises the following specific steps:
the method comprises the following steps that firstly, according to a design deepening drawing, a water channel (1) is partitioned and comprises a straight line area, an arc area and an intersection area, wherein the intersection area comprises the joint of the water channel (1) and a water channel platform (2) and a water channel lifting area (3), the joint of two or more water channels (1) and the joint of a straight line section and an arc line section;
step two, a construction joint is arranged at the intersection region, an intermittent joint reinforcing band (4) is arranged at the construction joint, and intermittent reinforced concrete (41) filled in the intermittent joint reinforcing band (4) contains 10-12% of an expanding agent;
in the second step, the width of the intermittent seam reinforcing belt (4) is not less than 2m, after two sections of the water channel (1) are poured, an intermittent reinforced water stop plate (42) is arranged on a concrete interface which is poured for the first time, wherein the intermittent reinforced water stop plate (42) is fixed on a steel bar framework in the concrete; intermittent reinforcing steel bar meshes (43) are arranged on both sides of the intermittent seam reinforcing belt (4) and at the section of the poured concrete in advance; during the second pouring, pouring intermittent reinforced concrete (41) doped with 10-12% of expanding agent and permeable crystals, and then continuously pouring permeable crystal concrete doped in the water channel (1); at the moment, the strength of the intermittently reinforced concrete (41) is ensured to be higher than that of the permeable crystalline concrete of the water channel (1) by one grade;
thirdly, continuous reinforcing bands (5) are arranged in the long straight line section in the straight line area at intervals, and the continuous reinforcing bands (5) are arranged at the connection part of two arc line sections with opposite openings in the arc area; the continuous reinforced concrete (51) filled in the continuous reinforcing belt (5) contains 10-12% of an expanding agent;
step four, during site construction, doping osmotic crystals and an expanding agent into the concrete of the water channel (1), wherein the doping amount of the expanding agent is 6-8%;
a reserved groove (6) is arranged at the position of the intermittent seam reinforcing belt (4) and on the long-distance water channel (1) at intervals, and an expansion water stop strip (7) is correspondingly arranged on the reserved groove (6);
step five, when the concrete is constructed in multiple times, the intermittent joint reinforcing belt (4) is cast after the first section of concrete is cast, the second section of concrete is cast firstly and then the intermittent joint reinforcing belt (4) is cast during the second casting, and chiseling, cleaning and moistening treatment are required to be carried out on the construction joint in contact with the first section;
when the continuous reinforcing belt (5) is constructed, concrete with strength higher than that of the water channel (1) is used for the continuous reinforcing belt (5), the concrete on two sides of the continuous reinforcing belt (5) is poured in advance at the same time, and then the continuous reinforcing belt (5) is directly poured.
2. The construction method of the expansion reinforcing band connection structure in the complex arc-shaped water channel according to claim 1, characterized in that, in the third step, when the water channel (1) with the length of more than 30m is poured at one time, the continuous reinforcing band (5) is arranged in the middle of the length of the one-time pouring, the length of the continuous reinforcing band is not less than 2m, and concrete is continuously poured until the designed construction joint of the one-time pouring is reached.
3. The construction method of the expansion reinforcing band connecting structure in the complex arc-shaped water channel is characterized in that floating slurry on the concrete surface of the water channel (1) is removed and chiseled before the second pouring, then a surface interface agent is brushed, an expansion water stop strip (7) is fixed in a reserved groove (6) by a steel nail at the interface of an intermittent reinforced water stop plate (42) and the concrete, and then the concrete of the water channel (1) is poured; after the concrete of the water channel (1) is poured to reach the designed strength, coating a permeable crystalline coating in a range of 300mm by taking the construction joint as the center;
the treatment of the transverse construction joint on the side wall (11) of the water channel is similar to that of the vertical construction joint, the floating slurry on the surface of concrete is chiseled and chiseled before the second pouring, a surface interface agent is brushed, the expansion water stop strip (7) is fixed in the preformed groove (6) by a steel nail, and then the concrete pouring is carried out; and after the pouring is finished and the concrete reaches the designed strength, coating a permeable crystalline coating in the range of 300mm by taking the construction joint as the center on the inner surface and the outer surface of the side wall.
4. The construction method of the expansion reinforcing band connection structure in the complex arc-shaped water channel according to claim 1, wherein the water channel (1) comprises water channel side walls (11) at two sides and a water channel bottom plate (12) connected to the bottoms of the water channel side walls (11), the water channel side walls (11) and the water channel bottom plate (12) are U-shaped, and the water channel (1) is divided into one layer, two layers or more layers; and the support wall concrete at the lower part of the water channel (1) of the second layer is poured to the bottom of the beam or the bottom of the plate at one time and is 2-3cm higher.
5. The construction method of the expansion reinforcing band connection structure in the complex arc-shaped water channel as claimed in claim 4, wherein the cross section of the water channel (1) is poured 2-5 times from bottom to top, and a plurality of horizontal construction joints are arranged, and after the concrete on the lower side of the cantilever slab is poured at the water channel side wall (11) of the local water channel (1), the longitudinally distributed reinforcing steel bars of the cantilever slab are secondarily bound, and then the construction of secondarily pouring the concrete of the cantilever slab is carried out.
6. The construction method of the expansion reinforcing band connection structure in the complex arc-shaped water channel as claimed in claim 5, wherein the center line of the water channel (1) is taken as a standard for measurement, control piles are nailed on extension lines of the center line of each section, 4-5 control sections are arranged in the arc length direction of the water channel (1), and the length of the outermost arc line is not more than 5 m; the control point of the external wall template is 500mm in the arc length direction, and the groove template is assembled into 2.5m points according to the whole template; and arranging a pair of elevation control points on the reserved steel bars for every 5m of the straight line section and every 1.5-3 m of the arc section so as to control the mould and complete the elevation of the surface.
7. The construction method for the expansion reinforcing band connecting structure in the complex arc-shaped water channel as claimed in claim 6, wherein a concrete cushion layer is arranged at the lower part of the water channel bottom plate (12), and a steel wire mesh is arranged in the cushion layer; the cushion layer is at least 150mm thick, the width of the cushion layer is supported corresponding to the inclined strut of the template and is the width of the water channel (1), and the width of the cushion layer is widened to two sides by 1.5 m; the flatness of the cushion layer is controlled within 3mm/2m, and before the cushion layer is poured, the pre-buried and reserved lengths of the electromechanical pipelines in the lower projection area are finished by paving the cushion layer in consideration of the range of the cushion layer; HRB 400-grade steel bars are adopted as steel bars in the water channel (1), and the strength standard value has the strength guarantee rate of not less than 95%; the reinforcing bar protective layer is 40mm, and local position sensor, ram department reinforcing bar protective layer are 25 mm.
8. The construction method for the connection structure of the expansion reinforcing belt in the complex arc-shaped water channel according to claim 7 is characterized in that the water channel (1) is prepared by mixing fresh concrete and is doped with an anti-seepage crystallization additive; the maximum grain size in the concrete should not exceed 1/4, which is the smallest dimension of the section of the member, and should not exceed 3/4, which is the smallest net spacing of the reinforcing bars; the maximum grain diameter of the solid concrete slab is not more than 1/3 of the slab thickness and is not more than 40 mm; the particle size of the concrete aggregate poured at the last time is not more than 13mm, and more than part of the aggregate needs to be screened out.
9. The construction method of the expansion reinforcing band connection structure in the complex arc-shaped water channel as claimed in claim 7, wherein the concrete of the water channel (1) has a mud content of not more than 1.0% and a mud block content of not more than 0.5% with coarse aggregate C30; the content of the mud in the concrete with C25 and below is not more than 2.0 percent, and the content of the mud blocks is not more than 0.7 percent; selecting medium sand as the fine aggregate, wherein the content of chloride ions is not more than 0.06 percent calculated according to the mass percentage of dry sand; cement: selecting common Portland cement to reduce hydration heat; when the alkali active aggregate is used, carrying out the cultivation on the seeds with the alkali content not exceeding 1.0kg/m, wherein the alkali content carried by the admixture is calculated by equivalent sodium oxide; and (5) carrying out dry distillation on the concrete under the condition that the total alkali content of the concrete is not more than 0.3 kg/m.
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| CN203531154U (en) * | 2013-06-18 | 2014-04-09 | 浙江海天建设集团有限公司 | Intermittent reinforcing band system used for continuously pouring concrete |
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| CN111749279A (en) * | 2020-06-03 | 2020-10-09 | 中国五冶集团有限公司 | Waterproof construction method for construction joint with combined design of water-stop steel plate and anti-crack reinforcing steel bar |
| CN112647469A (en) * | 2021-01-06 | 2021-04-13 | 中建一局集团建设发展有限公司 | Self-waterproof water channel structure with complex section, template and construction method thereof |
| CN112663566A (en) * | 2021-01-08 | 2021-04-16 | 中建一局集团建设发展有限公司 | Construction method of super-long annular self-waterproof concrete water channel |
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| GB769592A (en) * | 1954-11-04 | 1957-03-13 | Chester Irving Williams | Improvements in or relating to a crack-controlling joint strip |
| CN203531154U (en) * | 2013-06-18 | 2014-04-09 | 浙江海天建设集团有限公司 | Intermittent reinforcing band system used for continuously pouring concrete |
| CN105569339A (en) * | 2015-12-31 | 2016-05-11 | 青建集团股份公司 | Super-long structure seamless construction method combining sequence with skip and combining intermittence with reinforcement |
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