CN117364702A - Secondary-formed composite material flood-prevention rescue massive stone and preparation method thereof - Google Patents
Secondary-formed composite material flood-prevention rescue massive stone and preparation method thereof Download PDFInfo
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- CN117364702A CN117364702A CN202311358701.8A CN202311358701A CN117364702A CN 117364702 A CN117364702 A CN 117364702A CN 202311358701 A CN202311358701 A CN 202311358701A CN 117364702 A CN117364702 A CN 117364702A
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- 239000004575 stone Substances 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 19
- 230000002787 reinforcement Effects 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000004567 concrete Substances 0.000 claims abstract description 33
- 238000011049 filling Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 59
- 239000010959 steel Substances 0.000 claims description 59
- 239000011150 reinforced concrete Substances 0.000 claims description 47
- 239000013049 sediment Substances 0.000 claims description 33
- 238000005056 compaction Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 12
- 238000011068 loading method Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 238000007639 printing Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 7
- 238000010923 batch production Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000011257 shell material Substances 0.000 description 30
- 239000011162 core material Substances 0.000 description 12
- 230000002265 prevention Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000002689 soil Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 238000009415 formwork Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000002969 artificial stone Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
- E02B3/106—Temporary dykes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
- E02B3/106—Temporary dykes
- E02B3/108—Temporary dykes with a filling, e.g. filled by water or sand
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a secondary-molding composite material flood-control rescue large block stone and a preparation method thereof. The appearance of the large stone is regular quadrangular frustum pyramid, the integrity is good, the density is high, the size is large, the durability is good, the large stone is difficult to wash away by water flow, and the large stone can be well clamped at a root stone pile; the preparation method is simple and is convenient for batch production. The preparation method comprises the following steps: supporting an outer form on a planar floor; pouring concrete and lowering a reinforcement cage to form a bottom plate pre-pouring area with the thickness of 80mm; after curing for 7 days, filling sand and stones in the inner template, and compacting to form sand and stone cores; pouring concrete on the side face and the top of the large block stone, and covering a reinforcement cage cover; and (5) after the mixture is placed for 24 hours, demolding the outer template, and curing for 28 days to finally finish the preparation.
Description
Technical Field
The invention relates to the technical field of flood control engineering, in particular to a secondary-formed composite material flood control rescue massive stone structure and a preparation method thereof.
Background
In extreme weather, the river in the flood season has large flow, fast flow speed and sudden rise of water level, so that the dam bank and the river levee are eroded, and the earth and the stone are seriously lost, thereby causing slump. In flood control engineering, throwing flood control stones is a common river channel renovation and rescue and disaster relief means. After the flood prevention stone is thrown, root stones can be formed, so that the foundation and the foundation of the dam bank and the river levee are reinforced. The greater the flood control stone density is, the greater the body type is, and the better the treatment effect is. However, the conventional flood control stones are usually small in size, and small flood control stones are gathered into a whole by a lead wire cage and thrown when thrown, so that time and labor are wasted, and the method is uneconomical.
Along with the environmental protection policy of national mountain sealing and forest cultivation, stone exploitation is further limited, the sources of natural flood prevention stones are gradually reduced, and the price water rises. At present, artificial flood prevention stones are mainly divided into two types, namely small-sized concrete flood prevention stones which are manufactured by taking silt and cement as main materials, doping various chemical reagents and sintering or extrusion molding; the shell concrete flood prevention stone is manufactured by taking flexible materials and concrete as shells and materials such as sediment or steel slag as inner cores. The former has the defects that the firing pollutes the environment and wastes energy, or the extrusion molding has poorer water resistance and is easy to disintegrate, and the artificial flood control stone formed by firing or extrusion has smaller body shape; the latter has the disadvantage of being difficult to prepare as a shell material, and the prepared flood control stone has smaller density and size. Therefore, it is an unprecedented matter to find an artificial flood control stone to replace natural flood control stone.
Chinese patent publication No. CN107059791a discloses a preparation method of steel slag core concrete. The prepared stone is a reinforced concrete shell of a steel-plastic geogrid, and the core material is an artificial stone block of steel slag mixture. But suffer from the following drawbacks: the geogrid comprises 6 pieces which are connected together (how to connect is not described), the integrity is poor, and the overall tensile property cannot be effectively improved; because the rigidity of the geogrid is insufficient, the geogrid is difficult to position during construction; the steel slag core is complicated to manufacture, the steel slag is crushed and sieved firstly, then the binder is added, and the steel slag is compressed and molded by adopting a cold briquetting method; the size of the prepared stone is smaller, and the volume of the prepared stone is only 0.074m 3 。
Chinese patent publication No. CN204238179a discloses a preparation stone for square concrete covered soil structure. The prepared stone adopts a steel wire fiber net reinforced concrete shell, and the filler is silt, cohesive soil, water and straw stems. But suffer from the following drawbacks: the connection of the steel wire fiber net depends on welding, and the top steel wire fiber net is required to be placed at last after being filled into a soil core, so that the connection integrity of the part and other parts is poor; because the rigidity of the steel wire fiber net is insufficient, the steel wire fiber net is difficult to position during construction, and the steel wire fiber net easily deviates from the original position during vibration of a vibrating screen; the soil core manufacturing process is complex, cohesive soil and straw stems are needed to bond silt, and the source of the cohesive soil is limited due to national protection of cultivated land; the body size is smaller and the volume is only 0.125m 3 The method comprises the steps of carrying out a first treatment on the surface of the The soil core density is smaller, and the overall quality is smaller.
The composite material flood control massive stone provided by the invention has the advantages that the shell adopts high-seepage-proofing reinforced concrete, the materials used for the core body are not limited, the waste materials are fully utilized, and no water is generatedThe flood prevention stone can reach larger density by adopting complex process molding, the appearance adopts a unique regular quadrangular frustum pyramid, and the size is huge and can reach 1.06m 3 Is a novel design with great practical value.
Disclosure of Invention
The invention aims to solve the technical problem of providing a secondary-formed composite material flood-control rescue large stone and a preparation method thereof, wherein the flood-control large stone is required to have good integrity, high density, large size and good durability, is difficult to wash away by water flow and can be well clamped at a root stone pile; the preparation method is simple and is convenient for batch production.
In order to solve the technical problems, the invention adopts the following technical means:
a secondary formed composite material flood control rescue large block stone structure comprises concrete and a reinforcement cage, wherein the concrete and the reinforcement cage are surrounded into a reinforced concrete shell, a water stop belt is arranged at the bottom in the reinforced concrete shell, and a sand core is filled in the reinforced concrete shell;
the concrete is divided into a pre-cast area at the bottom end and a post-cast area above the pre-cast area;
the reinforcement cage is divided into a reinforcement cage cover, a reinforcement cage body and stirrups, and the reinforcement cage cover with hooks is arranged at the top end of the reinforcement cage body;
the water stop belt is welded at the bottom of the steel bar along one circle of the steel bar cage, and the lower part of the water stop belt is positioned in the pre-pouring area and the lower part of the water stop belt is positioned in the post-pouring area;
the sand core is tail ore wrapped by yellow river sediment and distributed in a layered mode, compaction intervals are arranged between the tail ore and the tailing stone and between the tail ore and the inner surface of the reinforced concrete shell, and the yellow river sediment is filled in the compaction intervals. The filled yellow river sediment facilitates the overall compaction of the sand core.
A further preferred scheme is as follows:
the side length of the lower bottom surface of the outer surface of the reinforced concrete shell is 700mm, the side length of the upper bottom surface is 1200mm, the height is 1147mm, and the thickness of the reinforced concrete shell is 80mm; the inner surface is the same size as the outer surface of the sand core.
The steel reinforcement cage is positioned at the middle part of the reinforced concrete shell.
The side length of the lower bottom surface of the reinforcement cage is 635mm, the side length of the upper bottom surface is 1105mm, the height is 1067mm, the diameter of the reinforcement is 8mm, the spacing between the vertical side surface and the upper bottom surface of the reinforcement cage is 200mm, the spacing between the reinforcement on the lower bottom surface of the reinforcement cage is 150mm, two rows of reinforcement bars are transversely arranged on the side surface and used as stirrups, and the two rows of stirrups are respectively 240mm from the upper bottom surface and 380mm from the lower bottom surface of the reinforcement cage.
The steel bars of the steel bar cage are slightly bent inwards to form radian; the two ends of each steel bar on the steel bar cage cover are provided with hooks which can be directly clamped on the steel bar cage body at the lower part.
The center position of the water stop is flush with the top surface of the pre-pouring area, so that the lower half of the water stop is positioned in the pre-pouring area, and the upper half of the water stop is positioned in the post-pouring area.
The material of the water stop belt is galvanized steel sheet with the thickness of 1mm, the width of the steel sheet is 100mm, and the side sides of the top surface and the bottom surface are provided with bending edges with the length of 10mm and the angle of 45 degrees. The edge is a standard construction method about the water stop belt, is convenient to contact with concrete well, is firmly embedded, and makes infiltration more difficult to penetrate into the interior.
The compaction interval between the tailing ore and the tailing stone is 200mm; the compaction interval between the tailing ore and the reinforced concrete casing was 100mm.
A preparation method of a secondarily-formed composite material flood-prevention rescue massive stone comprises the following steps:
(1) Two pairs of split high-rigidity steel plates are used as an outer template, a side wing is arranged on the outer template, 3 pairs of open holes are formed in the side wing, and 3 pairs of connecting bolts penetrate through the open holes to be connected;
(2) Placing the outer template on a planar bottom plate, wherein the bottom plate is made of a wood plate or a steel plate or any one of flat ground directly, and connecting the bottom plate by utilizing the dead weight of the outer template; coating a release agent on the inner sides of the outer template and the bottom plate;
(3) Pouring concrete for 40mm at the bottom of the inner side of the outer template, compacting and leveling by using a vibrating rod, and then lowering the reinforcement cage to enable the bottom surface of the reinforcement cage to be positioned on the pouring surface at the moment, and inserting a water stop belt into the pouring surface; connecting and fixing a water stop before or after the reinforcement cage is placed, pouring thick concrete continuously, compacting by using a vibrating rod, and curing to form a pre-pouring area, wherein the lower part of the water stop and the bottom end of the reinforcement cage are solidified together by the pre-pouring area; the side surface section area of the reinforced concrete shell of the casting area is not leveled, and the surface of the reinforced concrete shell is roughened by means of stone scattering, groove printing and the like, so that the contact between the casting area and the casting area is better;
(4) After the casting area is maintained, supporting rods are respectively inserted into the inner side and the outer side of the reinforcement cage, four inner templates are inserted into the inner side of the inner supporting rods, the inner templates are made of high-rigidity steel plates and consist of two inner templates with wings and two inner templates without wings, and the inner templates with wings and the inner templates without wings are buckled together to form a stable whole; the bottom of the inner template is propped against the pre-pouring area, the size of the formed inner space is the same as that of the sand core, but the height of the inner template is larger than the top surface of the sand core because the overflow of yellow river sediment is prevented when the sand core is filled;
(5) Filling a sand core in the inner template, filling a layer of rammed yellow river sediment according to the designed thickness, filling a layer of tailing stone on the rammed yellow river sediment, refilling the yellow river sediment, then filling the tailing ore, and compacting the sand core by a compacting system after the sand core is laid to meet the thickness requirement until the sand core is filled, so that the inside of the sand core is compacted.
(6) The compaction system comprises a loading plate, a jack and a reaction frame, wherein the stroke of the loading plate is from the top of the inner template to the designed top surface of the sand core; the yellow river sediment is filled to the top of the inner template, the counterforce is provided by the counterforce frame, the loading plate is stretched by the jack to compact the yellow river sediment, and the compaction is stopped when the yellow river sediment is compacted to the designed top surface of the sand core;
(7) Pouring a post-pouring area of concrete between the inner template and the outer template, vibrating by using a vibrating rod while pouring, extracting an outer supporting rod by using a cantilever crane after the pouring reaches the height of the reinforcement cage, extracting an inner supporting rod, extracting the inner template, continuing pouring the post-pouring area, vibrating, completely filling a gap left by the supporting rod and the inner template in the post-pouring area, and tightly contacting the post-pouring area with a sand core;
(8) Covering a reinforcement cage cover to form a closed reinforcement cage with the reinforcement cage, and continuously pouring concrete to ensure that the upper part of the reinforced concrete shell is 80mm, so as to form a complete reinforced concrete shell;
(9) And demolding the outer template, curing, and finally finishing the preparation.
The invention has the advantages that:
(1) The sand core adopts yellow river sediment and tail ore as raw materials, and has rich sources and extremely low price; the wastes are utilized and treated, so that waste is changed into valuable, ore exploitation is reduced, and the environment protection is facilitated.
(2) The sand-stone core composite structure has reasonable design, and can well combine the yellow river sediment and the tailing stone to form a strong core with high compactness.
(3) The reinforced concrete shell has reasonable structural design, can meet the stress requirement and can save materials; the construction process is simple, and mass production is convenient, so that the manufacturing cost of the flood control large stone is greatly reduced.
(4) The appearance of the flood prevention large stone is regular quadrangular frustum pyramid, which is different from the common cubes and cuboids, and is beneficial to the scour prevention of the large stone; when matched with flood control stones with other shapes, the stone can form good grading.
(5) When the reinforcement cage is manufactured, the reinforcement is slightly bent towards the inside of the quadrangular frustum, a certain radian is formed, and the reinforced concrete shell of the flood prevention massive stone is not easy to improve the anti-collision capability.
(6) The flood control large stone has good integrity, the reinforced concrete shell ensures enough anti-collision capacity, the compacted sand core ensures enough quality, and the reinforced concrete shell and the sand core can be tightly combined together by the construction process.
(7) The flood prevention large stone has huge body, and the volume can reach 1.06m 3 The total mass is 2.2t, which is very beneficial to flood fighting and rescue work and has extremely high practical value.
Drawings
Fig. 1 is a block diagram of the flood control stone of the present invention.
Fig. 2 is an overall perspective view of the flood control massive stone reinforcement cage of the present invention.
Fig. 3 is a detail view of the reinforcement cage cover of the flood control massive stone reinforcement cage of the present invention.
Fig. 4 is an overall perspective view of the flood control massive stone water stop of the present invention.
Fig. 5 is a cross-sectional view of a flood control massive stone water stop according to the invention.
Fig. 6 is a block diagram of the flood control massive stone sand core of the present invention.
Fig. 7 is a plan view of a process for preparing flood control large stones according to the invention.
Fig. 8 is a perspective view of a process for preparing flood control large stones according to the invention.
Fig. 9 is an overall view of an outer mold during the preparation of flood control large stones according to the invention.
Fig. 10 is a detail view of the outer mold during the preparation of the flood control stone of the present invention.
Fig. 11 is an overall view of an internal mold during the flood control of the present invention.
Fig. 12 is a detail view of the inner mold with wings during the preparation of the flood control stone of the present invention.
Fig. 13 is a detail view of the inner mold without wings during the flood control of the present invention.
Fig. 14 is a perspective view of a support bar during the preparation of flood control boulders of the present invention.
Fig. 15 is a compaction of the sand core during the flood control of the present invention.
Reference numerals illustrate: 1-concrete, 1.1-pre-pouring area, 1.2-post-pouring area, 2-reinforcement cage, 2.1-reinforcement cage cover, 2.2-reinforcement cage body, 2.3-stirrup, 3-water stop, 4-sand core, 4.1-yellow river sediment, 4.2-tail ore, 4.3-sand core design top surface, 5-outer template, 6-connecting bolt, 7-outer support rod, 8-inner support rod, 9-inner template, 9.1-winged inner template, 9.2-winged inner template, 10-loading plate, 11-jack, 12-reaction frame and 13-bottom plate.
Detailed Description
The following description is exemplary and is intended to provide further detailed description of the present application, and the terminology used is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application.
Referring to fig. 1-6, the secondary formed composite material flood-prevention rescue massive stone structure of the invention is composed of concrete 1, a reinforcement cage 2, a water stop 3 and a sand core 4.
Referring to fig. 1, the concrete 1 and the reinforcement cage 2 form a reinforced concrete shell, and the appearance is a regular quadrangular frustum.
The concrete dimension of the reinforced concrete shell is that the side length of the lower bottom surface is 700mm, the side length of the upper bottom surface is 1200mm, the height is 1147mm, and the thickness of the reinforced concrete shell is 80mm; the inner surface is the same size as the outer surface of the sand core.
Referring to fig. 2-3, it can be seen that the reinforcement cage 2 is located in the middle of the reinforced concrete casing, the side length of the lower bottom surface is 635mm, the side length of the upper bottom surface is 1105mm, the height is 1067mm, the diameter of the reinforcement is 8mm, the spacing between the vertical side surface and the upper bottom surface is 200mm, the spacing between the reinforcement on the lower bottom surface is 150mm, and two rows of reinforcement bars are transversely arranged on the side surface as stirrups 2.3, and the distances between the reinforcement bars and the upper bottom surface are 240mm and 380mm respectively; the steel bars of the steel bar cage 2 are slightly bent towards the inside of the quadrangular frustum to form radian; the steel reinforcement cage 2 is divided into a steel reinforcement cage cover 2.1, a steel reinforcement cage body 2.2 and stirrups 2.3, hooks are arranged at two ends of each steel reinforcement on the steel reinforcement cage cover 2.1, and the steel reinforcement cage can be directly clamped on the steel reinforcement cage body 2.2 at the lower part, and the steel reinforcement is connected by binding.
Referring to fig. 4-5 and fig. 7, it can be known that the water stop 3 is welded at the bottom of the steel bar along the circumference of the steel bar cage 2, and the specific position is referring to fig. 7, the center position of the water stop 3 is flush with the top surface of the pre-cast area 1.1, so that the lower half of the water stop 3 is located in the pre-cast area 1.1, the upper half of the water stop 3 is located in the post-cast area 1.2, and the concrete with the distance of about 23mm from the water stop 3 to the outermost side of the reinforced concrete shell is still used as a protective layer; the material of waterstop 3 is thick 1 mm's galvanized steel sheet, and steel sheet width is 100mm, and the avris of top surface and bottom surface is equipped with long 10mm, the angle is 45 the border of buckling, and the border is convenient for well with concrete contact, firmly gomphosis lets the infiltration more difficult to inside.
Referring to fig. 6, the sand core 4 is a tailing stone 4.2 wrapped by yellow river sediment 4.1 and distributed in a layered manner, compaction intervals are respectively arranged between the tailing stone 4.2 and between the tailing stone 4.2 and the reinforced concrete casing, the yellow river sediment 4.1 is filled in the compaction intervals, and the filled yellow river sediment 4.1 is convenient for compacting the sand core 4.
The compaction interval between the tailing 4.2 and the tailing 4.2 is 200mm; the compaction distance between the tailing 4.2 and the reinforced concrete casing was 100mm. The compaction interval here is the thickness after compacting with the compactor when laying in layers, and the compactor generally has difficulty compacting to very closely knit condition, therefore, need to use compaction system, i.e. jack 11 again compaction after filling up, until all the soil and stones of weighed quality are filled up, reach the compactness of design.
Referring to fig. 7-15, a preparation method of a secondary formed composite material flood control rescue massive stone comprises the following steps:
(1) Referring to fig. 9 and 10, two pairs of split high-rigidity steel plates with the thickness of more than 5mm are adopted as an outer template 5, 90-degree bent side wings are arranged on the outer template 5, 3 pairs of open holes are formed in the side wings, and 3 pairs of high-strength connecting bolts 6 are used for connecting through the open holes.
(2) Referring to fig. 7 and 8, the outer template 5 is placed on a planar bottom plate 13, and the bottom plate 13 may be made of wood board or steel board, or a flat ground is directly used as the bottom plate 13; the self weight of the outer template 5 is utilized to connect with the bottom plate 13; the mold release agent is applied to the inner sides of the outer mold plate 5 and the bottom plate 13.
(3) Referring to fig. 7 and 8, pouring concrete with the thickness of 40mm at the bottom of the inner side of the outer template 5, vibrating and leveling by using a vibrating rod, then lowering the reinforcement cage 2, enabling the bottom surface of the reinforcement cage 2 to be positioned at the pouring surface at the moment, and inserting the water stop belt 3 into the pouring surface; before or after the reinforcement cage 2 is placed, the water stop 3 is required to be connected and fixed, then concrete with the thickness of 40mm is continuously poured, the concrete bottom plate is 80mm thick, the concrete bottom plate is compacted by a vibrating rod and then is maintained for 7 days, a pre-pouring area 1.1 is formed, and the lower part of the water stop 3 and the bottom end of the reinforcement cage 2 are solidified together by the pre-pouring area 1.1; the side surface section area of the reinforced concrete shell of the pre-cast area 1.1 is not leveled, and the surface of the reinforced concrete shell is roughened by means of stone scattering, groove printing and the like, so that the reinforced concrete shell is better in contact with the pre-cast area 1.1 when the post-cast area 1.2 is cast.
(4) Referring to fig. 7, 8 and 11-14, after curing for 7 days in the casting area 1.1, respectively inserting supporting rods 8 at the inner side and the outer side of the reinforcement cage 2, and inserting four inner templates 9 at the inner side of the inner supporting rods 8, wherein the inner templates 9 are made of high-rigidity steel plates with the thickness of more than 5mm and are composed of two inner templates 9.1 with wings and two inner templates 9.2 without wings, and the inner templates 9.1 with wings and the inner templates 9.2 without wings are buckled together to form a stable whole; the bottom of the inner template 9 is abutted against the pre-pouring area 1.1, and the size of the formed inner space is the same as that of the sand core 4, but the height of the inner template 9 is larger than that of the top surface of the sand core 4 and is 100mm higher than that of the sand core 4 because the overflow of yellow river sediment 4.1 is prevented when the sand core 4 is filled.
(5) Referring to fig. 7 and 8, filling a sand core 4 in an inner template 9, filling a layer of yellow river sediment 4.1 according to the thickness of 200mm, filling a layer of tailing stone 4.2 with the thickness of 100mm, refilling the yellow river sediment 4.1, and then filling tail ore 4.2 until the sand core 4 is filled, wherein the distance between the periphery of the tail ore 4.2 and the inner side surface of the inner template 9 is not less than 100mm, and paving the tail ore in sequence from the bottom surface to the top by taking care of controlling the distance by a ruler during operation; taking the experimental parameters of the materials adopted by the invention as examples, weighing dry yellow river sediment 4.1 to be 0.8t, weighing tailing stone 4.2 to be 0.3t, and taking different values when different materials are sourced; after each layer of yellow river sediment 4.1 is paved, compaction is needed, and a small-sized rammer can be adopted until the thickness requirement of the paved sand core 4 is met, and the sand core 4 is compacted by a compacting system, so that the inside of the sand core 4 is compacted.
(6) Referring to fig. 15, the compacting system is composed of a loading plate 10, a jack 11 and a counter-force frame 12, wherein the stroke of the loading plate 10 is from the top of an inner template 9 to a sand core design top surface 4.3, in fig. 15, the sand core design top surface 4.3 is the top surface when the sand core 4 is completely compacted and meets the compactness design requirement, and the top surface is higher than the sand core design top surface 4.3 before the uncompacted is completed in the filling process; the yellow river sediment 4.1 is filled to the top of the inner template 9, the counterforce is provided by the counterforce frame 12, the loading plate 10 compacts the yellow river sediment 4.1 by stretching through the jack 11, and the compaction is stopped when the yellow river sediment is compacted to the sand core design top surface 4.3; if the sand and silt 4.1 is left after one compaction, filling the sand and silt 4.1 into the top of the inner template 9, continuing to compact the sand and stone core to the position of the designed top surface 4.3, and repeating the process until the weighed sand and stone are completely pressed in, so that the sand and stone core 4 reaches the compactness required by the design.
(7) Referring to fig. 6 and 7, the post-cast area 1.2 of the concrete 1 is cast between the inner formwork 9 and the outer formwork 5, vibrating is carried out by using a vibrating rod while casting, after the casting reaches the height of the reinforcement cage 2, the outer support rod 7 is pulled out by using a cantilever crane, the inner support rod 8 is pulled out, the inner formwork 9 is pulled out, casting of the post-cast area 1.2 is continued, vibrating is carried out, the post-cast area 1.2 is completely filled in a gap left by the support rod and the inner formwork 9, and the post-cast area 1.2 is in close contact with the sand core 4.
(8) Referring to fig. 3, 6 and 7, the reinforcement cage cover 2.1 is covered to form a closed reinforcement cage 2 with the reinforcement cage body 2.2, and concrete (1) is continuously poured to enable the reinforced concrete shell at the upper part to reach 80mm, so that a complete reinforced concrete shell is formed.
(9) And (5) demolding the outer template 5 after standing for 24 hours, and curing for 28 days to finally finish the preparation.
The construction process of the embodiment is simple, and the flow production is convenient; the sand core raw material is recycled, and the reinforced concrete shell meets the stress and economic requirements, so that the flood prevention large stone not only meets the requirement of environmental protection, but also has higher economic value.
The above description is only of a preferred embodiment of the present invention, and the physical and mechanical parameters used are actual test data in the process of the present invention, and may vary from material source to material source, from batch to batch, and from preparation process to process, therefore, the scope of the present invention is not limited by the following claims, and all equivalent structural changes made by applying the descriptions and the drawings of the present invention are included in the scope of the present invention.
Claims (9)
1. The utility model provides a combined material flood control of secondary shaping is speedily carried out rescue work and is makeed a stone structure, includes by concrete (1), steel reinforcement cage (2), its characterized in that: the reinforced concrete is characterized in that the reinforced concrete (1) and the reinforcement cage (2) are surrounded to form a reinforced concrete shell, a water stop belt (3) is arranged at the bottom in the reinforced concrete shell, and a sand core (4) is filled in the reinforced concrete shell;
the concrete (1) is divided into a pre-cast area (1.1) at the bottom end and a post-cast area (1.2) above the pre-cast area;
the steel reinforcement cage (2) is divided into a steel reinforcement cage cover (2.1), a steel reinforcement cage body (2.2) and stirrups (2.3), and the steel reinforcement cage cover (2.1) with hooks is arranged at the top end of the steel reinforcement cage body (2.2);
the water stop (3) is welded at the bottom of the steel bar along the circumference of the steel bar cage (2), the lower part of the water stop (3) is arranged in the pre-pouring area (1.1), and the upper part of the water stop (3) is arranged in the post-pouring area (1.2);
the sand core (4) is a tailing stone (4.2) which is wrapped by yellow river sediment (4.1) and distributed in a layered mode, compaction intervals are formed between the tailing stone (4.2) and between the tailing stone (4.2) and the inner surface of the reinforced concrete shell, and the yellow river sediment (4.1) is filled in the compaction intervals.
2. The overmoulded composite flood control rescue massive stone structure according to claim 1, characterized in that: the side length of the lower bottom surface of the outer surface of the reinforced concrete shell is 700mm, the side length of the upper bottom surface is 1200mm, the height of the upper bottom surface is 1147mm, the thickness of the reinforced concrete shell is 80mm, and the size of the inner surface is the same as the size of the outer surface of the sand core (4).
3. The overmoulded composite flood control rescue massive stone structure according to claim 1, characterized in that: the steel reinforcement cage (2) is positioned at the middle part of the reinforced concrete shell.
4. A overmolded composite flood control rescue stone structure according to claim 3, wherein: the side length of the lower bottom surface of the reinforcement cage (2) is 635mm, the side length of the upper bottom surface is 1105mm, the height is 1067mm, the diameter of the reinforcement is 8mm, the spacing between the vertical side surface and the upper bottom surface is 200mm, the spacing between the reinforcement on the lower bottom surface is 150mm, two rows of reinforcement bars are transversely arranged on the side surface to serve as stirrups (2.3), and the two rows of stirrups (2.3) are respectively 240mm from the upper bottom surface and 380mm from the lower bottom surface.
5. The overmoulded composite flood control rescue massive stone structure according to claim 1, characterized in that: the steel bars of the steel bar cage (2) are slightly bent inwards to form radian; the two ends of each steel bar on the steel bar cage cover (2.1) are provided with hooks, and the hooks can be directly clamped on the steel bar cage body (2.2) at the lower part.
6. The overmoulded composite flood control rescue massive stone structure according to claim 1, characterized in that: the center position of the water stop (3) is flush with the top surface of the pre-cast area (1.1), so that the lower half of the water stop (3) is positioned in the pre-cast area (1.1), and the upper half of the water stop (3) is positioned in the post-cast area (1.2).
7. The overmoulded composite flood control rescue massive stone structure according to claim 1, characterized in that: the water stop (3) is made of galvanized thin steel plates with the thickness of 1mm, the width of the thin steel plates is 100mm, and the side sides of the top surface and the bottom surface are provided with bent edges with the length of 10mm and the angle of 45 degrees.
8. The overmoulded composite flood control rescue massive stone structure according to claim 1, characterized in that: the compaction interval between the tailing stone (4.2) and the tailing stone (4.2) is 200mm; the compaction interval between the tailing (4.2) and the reinforced concrete casing was 100mm.
9. The preparation method of the secondarily-formed composite material flood-prevention rescue massive stone is characterized by comprising the following steps of:
(1) Two pairs of split high-rigidity steel plates are used as an outer template (5), a side wing is arranged on the outer template (5), 3 pairs of opening holes are formed in the side wing, and 3 pairs of connecting bolts (6) are used for connecting through the opening holes;
(2) The outer template (5) is placed on a planar bottom plate (13), the bottom plate (13) is made of wood plates or steel plates, or any one of the flat ground is directly flattened, and the self weight of the outer template (5) is utilized to be connected with the bottom plate (13); coating release agent on the inner sides of the outer template (5) and the bottom plate (13);
(3) Pouring concrete 40mm at the bottom of the inner side of the outer template (5), compacting and leveling by using a vibrating rod, then lowering a reinforcement cage (2), connecting and fixing a water stop belt (3) before or after the reinforcement cage (2) is placed, continuously pouring thick concrete, compacting by using the vibrating rod, and curing to form a pre-pouring area (1.1), wherein the pre-pouring area (1.1) solidifies the lower part of the water stop belt (3) with the bottom end of the reinforcement cage (2); the side surface section area of the reinforced concrete shell of the pre-cast area (1.1) is not leveled, and the surface of the reinforced concrete shell is roughened by means of stone scattering, groove printing and the like, so that the reinforced concrete shell is better in contact with the pre-cast area 1.1 when the post-cast area (1.2) is cast;
(4) After the casting area 1.1 is maintained, supporting rods (8) are respectively inserted into the inner side and the outer side of the reinforcement cage (2), four inner templates (9) are inserted into the inner side of the inner supporting rods (8), the inner templates (9) are made of high-rigidity steel plates and consist of two inner templates (9.1) with wings and two inner templates (9.2) without wings, and the inner templates (9.1) with wings and the inner templates (9.2) without wings are buckled together to form a stable whole; the bottom of the inner template (9) is propped against the pre-pouring area (1.1), the size of the formed inner space is the same as the size of the sand core (4), but the height of the inner template (9) is larger than the top surface of the sand core (4) because the overflow of yellow river sediment (4.1) is prevented when the sand core (4) is filled;
(5) Filling a sand core (4) in an inner template (9), filling a layer of yellow river sediment (4.1) according to the designed thickness, filling a layer of tailing stone (4.2) on the sand core, refilling the yellow river sediment (4.1), then filling tailing ore (4.2), and compacting the sand core (4) by a compacting system after the sand core (4) is paved until the sand core (4) is filled, so that the inside of the sand core (4) is compacted;
(6) The compaction system comprises a loading plate (10), a jack (11) and a counter-force frame (12), wherein the stroke of the loading plate (10) is from the top of the inner template (9) to the sand core design top surface (4.3); the yellow river sediment (4.1) is filled at the top of the inner template (9), a counterforce frame (12) provides counterforce, the loading plate (10) compacts the yellow river sediment (4.1) by stretching through the jack (11), and the compaction is stopped when the yellow river sediment is compacted to the designed top surface (4.3) of the sand core;
(7) Pouring a post-pouring area (1.2) of the concrete (1) between the inner template (9) and the outer template (5), vibrating by using a vibrating rod while pouring, extracting an outer supporting rod (7) by using a cantilever crane after the pouring reaches the height of the reinforcement cage (2), extracting an inner supporting rod (8), extracting the inner template (9), continuing pouring the post-pouring area (1.2) and vibrating, so that the post-pouring area (1.2) completely fills a gap left by the supporting rod and the inner template (9), and the post-pouring area (1.2) is tightly contacted with a sand core (4);
(8) Covering a reinforcement cage cover (2.1) to form a closed reinforcement cage (2) with the reinforcement cage body (2.2), and continuously pouring concrete to ensure that the upper reinforced concrete shell is 80mm, so as to form a complete reinforced concrete shell;
(9) And (5) demolding the outer template, curing, and finally finishing the preparation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311358701.8A CN117364702A (en) | 2023-10-19 | 2023-10-19 | Secondary-formed composite material flood-prevention rescue massive stone and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311358701.8A CN117364702A (en) | 2023-10-19 | 2023-10-19 | Secondary-formed composite material flood-prevention rescue massive stone and preparation method thereof |
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