CN112049421A - Self-compacting rock-fill concrete construction process - Google Patents
Self-compacting rock-fill concrete construction process Download PDFInfo
- Publication number
- CN112049421A CN112049421A CN202010891457.1A CN202010891457A CN112049421A CN 112049421 A CN112049421 A CN 112049421A CN 202010891457 A CN202010891457 A CN 202010891457A CN 112049421 A CN112049421 A CN 112049421A
- Authority
- CN
- China
- Prior art keywords
- concrete
- self
- compacting
- rock
- template
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
Abstract
The invention discloses a self-compacting rock-fill concrete construction process, which comprises the following steps: step 1: treating the surface of a basic bin; firstly, loose rock blocks, impurities, soil and the like are removed, the materials are washed clean without accumulated water, then the materials are washed to be rough by a high-pressure water gun, and finally an electric air pick is used for chiseling; step 2: installing a template; before the construction of the template engineering, the geometric dimension is designed according to the engineering structure, the strength, the rigidity and the stability of the template support are ensured, and the template is formed by combining a steel template and a bamboo plywood; and step 3: stacking the stones; when the strength of the concrete reaches more than 2.5MPa, stacking materials are stacked; the invention can remarkably reduce or even avoid the construction defects caused by the lack of subjective experience of construction operators in the traditional vibrating and compacting construction process; the technical problems that the vibration compaction construction of a complex structure is difficult and the like can be solved; the space of the rockfill is filled by means of self weight to form the concrete with high stone content.
Description
Technical Field
The invention relates to the technical field of concrete construction, in particular to a self-compacting rock-fill concrete construction process.
Background
Concrete, concrete for short: refers to the general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called ordinary concrete, is widely used in civil engineering.
However, the existing concrete construction process has the following defects:
1. in the concrete construction process, the subjective factor of construction operators is strong, and when the subjective factor of the operators is deficient, the construction defects are easy to occur;
2. in the pouring process of concrete, the concrete is compacted through the vibration device, so that partial vibration blind areas exist, and the compaction difficulty is increased;
3. it is difficult to fill the rockfill voids.
Disclosure of Invention
The invention aims to provide a self-compacting rock-fill concrete construction process to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a self-compacting rock-fill concrete construction process comprises the following steps:
step 1: treating the surface of a basic bin; firstly, loose rock blocks, impurities, soil and the like are removed, the materials are washed clean without accumulated water, then the materials are washed to be rough by a high-pressure water gun, and finally an electric air pick is used for chiseling;
step 2: installing a template; before the construction of the template engineering, the geometric dimension is designed according to the engineering structure, the strength, the rigidity and the stability of the template support are ensured, and the template is formed by combining a steel template and a bamboo plywood;
and step 3: stacking the stones; when the strength of the concrete reaches more than 2.5MPa, stacking materials are stacked;
and 4, step 4: mixing self-compacting concrete; putting the water cement, the sand stone, the water and the fly ash into a stirrer to be stirred to obtain self-compacting concrete;
and 5: self-compacting concrete transportation; the self-compacting concrete obtained in the step 4 is transported to the bottom of the dam by a concrete tank truck, then is pumped to the surface of a bin by a 75-type concrete delivery pump, and is distributed by a tower crane matched with a distributing machine, so that the delivery quality of the concrete and the continuity of the pouring process can be ensured;
step 6: pouring self-compacting concrete; firstly, checking whether a bin surface is clean and wet, cleaning up sundries and tools on the bin surface and loosening stones, and then putting the bin into a bin by adopting a pumping mode, wherein the sequence is that casting points are arranged in a unidirectional mode from upstream to downstream;
and 7: curing the self-compacting concrete; after the high-self-compactness rockfill concrete is poured, sun exposure should be avoided before maintenance, and water spraying maintenance is started within 6-18 h after the rockfill concrete is poured.
Preferably, in the step 1, roughening is performed to finally form rough surface and expose small stones.
Preferably, in the step 2, before the formwork is installed, a measuring line is firstly arranged, the formwork is installed according to the position provided by the measuring line, and the supporting form of the formwork is the same as that of common concrete, and corresponding support is adopted according to the structural form of a building.
Preferably, the template is sealed by splicing: the transverse and vertical abutted seams are sealed by tapes except the double faced adhesive tapes, and the lower opening of the template is sealed by plastering mortar.
Preferably, in the step 3, before the rockfill is put into the field, stones with the particle size of less than 200mmm are screened out, and soil, ash layers and mud blocks attached to the surface of the stone are cleaned; cleaning the mud blocks brought into the surface of the rock-piling bin, and dispersing relatively concentrated small-particle-size block stones.
Preferably, the stone blocks are fresh and complete, hard in texture and free of peeling layers and cracks, and the stone blocks with the grain size of less than 30cm are separately transported and dispersedly stacked.
Preferably, in the step 4, the variation of the water-cement ratio cannot exceed the range of +/-0.02-0.01, the dosage of the sand and stone can be adjusted within the range of +/-5%, and the dosage of the water can be adjusted within the range of +/-10 Kg-20 Kg.
Preferably, in the step 5, before the self-compacting concrete is subjected to self-compacting, 0.5-0.8 m3 of clear water is added into the conveying bin to wet and clean the pump pipe.
Preferably, in the step 6, the cold joint is prevented from being formed due to too much natural flowing of the concrete and slow supply of the concrete in the pouring process, and the slump of the concrete is controlled to be 250-280 mm, so that the concrete flows naturally and is covered by the upper layer of concrete before initial setting.
Preferably, in the step 7, the concrete is continuously maintained, the surface of the concrete is kept wet all the time in the maintenance period, and the maintenance time is not shorter than 28 days.
Compared with the prior art, the invention has the beneficial effects that:
1. construction defects caused by lack of subjective experience of construction operators in the traditional vibrating and compacting construction process can be remarkably reduced or even avoided;
2. the technical problems that the vibration compaction construction of a complex structure is difficult and the like can be solved;
3. the space of the rockfill is filled by means of self weight to form the concrete with high stone content.
Drawings
FIG. 1 is a flow chart of the process for making the rockfill concrete of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A self-compacting rock-fill concrete construction process comprises the following steps:
step 1: treating the surface of a basic bin; at first clear away not hard up rock, debris, earth etc. wash totally and do not have ponding, then dash the hair through high-pressure squirt, electric pick chisel hair at last, construction storehouse face control standard: the high self-compaction performance concrete pouring is preferably limited to the condition that a large amount of stones are 50-150 mm higher than the pouring surface, the combination of the layers is strengthened, the interlayer seam is punched after the concrete is finally set after the pouring is finished, and the compressive strength of the concrete before the seam surface is punched is not lower than 2.5 MPa;
step 2: installing a template; before the construction of the template engineering, the geometric dimension and the template are designed according to the engineering structure
The support should ensure strength, rigidity and stability, the template is formed by combining a steel template and a bamboo plywood, wherein the steel template is usually made of Q235 steel and 16Mn steel, and the thickness of the panel is 5 mm; the wooden template is used for corner special-shaped parts and special positions where the shaped steel die cannot be adopted;
and step 3: stacking the stones; when the concrete strength reaches more than 2.5MPa, stacking stones, dividing the region to be stacked with a white line into regions before the stones are put into a bin so as to distinguish the region which is 1.0m wide and is not stacked with stones on the upstream panel, a transportation road region of the stacking stones and a stacking stone region;
and 4, step 4: mixing self-compacting concrete; the water cement, the sand stone, the water and the fly ash are put into a stirrer to be stirred to obtain the self-compacting concrete, the stirring time is controlled well in the production process of the concrete, the shortest stirring time is longer than that of the common concrete, the stirring time is not shorter than 2 minutes under the general condition, and the uniformity, the good workability and the fluidity of the concrete are ensured;
and 5: self-compacting concrete transportation; the self-compacting concrete obtained in the step 4 is transported to the bottom of a dam through a concrete tank car, then is pumped to the surface of a bin through a 75-type concrete delivery pump, and is distributed through a tower crane and a distributing machine, the delivery quality of the concrete and the continuity of the pouring process can be ensured by the mode, before pumping, a pump pipe and a joint of each pump pipe are checked in advance, sealing rings are added, whether the connection is tight, and the whole pipeline is ensured to be airtight and airtight;
step 6: pouring self-compacting concrete; firstly, checking whether a bin surface is clean and wet, cleaning up sundries and tools on the bin surface and loosening stones, and then putting the bin into a bin by adopting a pumping mode, wherein the sequence is that casting points are arranged in a unidirectional mode from upstream to downstream;
and 7: curing the self-compacting concrete; after the high-self-compactness rockfill concrete is poured, sun exposure should be avoided before maintenance, and water spraying maintenance is started within 6-18 h after the rockfill concrete is poured.
In the step 1, rough pitted surface is formed finally by scabbling, small stones are exposed slightly, and the total area of the small stones with the particle size of more than 5.0mm accounts for 20-30% of the treatment area. The roughness is controlled within +/-2 mm-3 mm, the aggregate cannot be damaged, the scabbling quality is good, but the processing speed is relatively slow, the requirement on the construction speed is low, and the method can be applied to a bin surface with the area not more than 500m 2. And (3) chiseling the vertical joint surface part of the new and old concrete and chiseling the concrete panel part with the crack-stopping reinforcing steel bars on the upstream surface.
In the step 2, measurement paying-off is firstly carried out before the templates are installed, the templates are installed according to the positions provided by the measurement paying-off, the supporting form of the templates is the same as that of common concrete, corresponding support is adopted according to the structural form of a building, cantilever templates are adopted, the top of each template adopts a counter-pulling form after stockpiling materials are put in a warehouse, the height of each pouring layer is 1.50m, and each template is 5m long and 0.8t heavy. The outer side of each template is reinforced by vertical small ridges with the length of 8mm multiplied by 80mm multiplied by 1500mm and 4 longitudinal ridges of 14# channel steel. The small ridge spacing is not more than 300mm, the upper opening and the lower opening are respectively provided with a sealing steel plate, then the sealing steel plates are transversely connected by bolts, the upper opening is fixed by split bolts, the longitudinal and transverse spacing of the bolts is not more than 1000mm, and the split bolts are connected with turnbuckle screws by phi 14 III-grade steel bars and are adjusted to be proper in tightness and play a role in restraining the template.
Sealing the splicing seams of the templates: the transverse and vertical abutted seams are sealed by adhesive tapes except for the double-faced adhesive tapes, the lower opening of the template is sealed by plastering mortar, and the abutted seams and the lower opening of the template are sealed by double-layer double-faced adhesive tapes.
Step 3, screening out stones with the particle size of less than 200mmm before the rockfill is put into the field, and cleaning soil, ash layers and mud blocks attached to the surfaces of the stones; cleaning the mud blocks brought to the surface of the rock-fill silo, dispersing relatively concentrated small-grain-size rock blocks, wherein the maximum grain size of the rock-fill blocks should not exceed 1/4 of the minimum side length of the structural section and 1/2 of the thickness of the rock-fill blocks. The rock-fill material has a saturated compressive strength of not less than 30 MPa.
The block stone is fresh and complete in material, hard in texture and free of peeling layers and cracks, the block stones with the grain sizes smaller than 30cm are separately transported and stacked in a dispersed mode, soil attached to the surfaces of the block stones must be cleaned, the stacking block stone yard needs to be hardened, drainage is smooth, and therefore the soil is prevented from being brought in when the block stones are placed in a warehouse.
Example 2
A self-compacting rock-fill concrete construction process comprises the following steps:
step 1: treating the surface of a basic bin; at first clear away not hard up rock, debris, earth etc. wash totally and do not have ponding, then dash the hair through high-pressure squirt, electric pick chisel hair at last, construction storehouse face control standard: the high self-compaction performance concrete pouring is preferably limited to the condition that a large amount of stones are 50-150 mm higher than the pouring surface, the combination of the layers is strengthened, the interlayer seam is punched after the concrete is finally set after the pouring is finished, and the compressive strength of the concrete before the seam surface is punched is not lower than 2.5 MPa; after the cabin surface is brushed, the concrete slope surface which is formed upstream and downstream is washed in time, so that the appearance quality is prevented from being polluted;
step 2: installing a template; before the construction of the template engineering, the geometric dimension is designed according to the engineering structure, the template support is required to ensure the strength, the rigidity and the stability, the template is combined by adopting a steel template and a bamboo plywood, wherein the steel template usually adopts Q235 steel and 16Mn steel, and the thickness of a panel is 5 mm; the wooden template is used for corner special-shaped parts and special positions where the shaped steel die cannot be adopted;
and step 3: stacking the stones; when the concrete strength reaches more than 2.5MPa, stacking stones, dividing the region to be stacked with a white line into regions before stacking stones into a warehouse for distinguishing the region which is 1.0m wide and is not stacked with stones on an upstream panel, a stacking stone transportation road region and a stacking stone region, wherein the stone warehouse faces to the qualified stone blocks, manual matching and warehousing are carried out by using a tower crane for transporting and distributing the stones, the stones can be randomly stacked, but the large contact surface of the basic concrete is adjusted to ensure the bonding of new and old concrete; when the stones are piled near the template, selecting the stones with small particle sizes as far as possible, and leaving the template for 30-100 cm;
and 4, step 4: mixing self-compacting concrete; the water cement, the sand stone, the water and the fly ash are put into a stirrer to be stirred to obtain the self-compacting concrete, the stirring time is controlled well in the production process of the concrete, the shortest stirring time is longer than that of the common concrete, the stirring time is not shorter than 2 minutes under the general condition, and the uniformity, the good workability and the fluidity of the concrete are ensured;
and 5: self-compacting concrete transportation; the self-compacting concrete obtained in the step 4 is transported to the bottom of a dam through a concrete tank car, then is pumped to the surface of a bin through a 75-type concrete delivery pump, and is distributed through a tower crane and a distributing machine, the delivery quality of the concrete and the continuity of the pouring process can be ensured by the mode, before pumping, a pump pipe and a joint of each pump pipe are checked in advance, sealing rings are added, whether the connection is tight, and the whole pipeline is ensured to be airtight and airtight;
step 6: pouring self-compacting concrete; firstly, checking whether a bin surface is clean and wet, cleaning up sundries and tools on the bin surface and loosening stones, and then putting the bin into a bin by adopting a pumping mode, wherein the sequence is that casting points are arranged in a unidirectional mode from upstream to downstream;
and 7: curing the self-compacting concrete; after the high-self-compactness rockfill concrete is poured, sun exposure should be avoided before maintenance, and water spraying maintenance is started within 6-18 h after the rockfill concrete is poured.
In the step 1, rough pitted surface with tiny exposed small stones with the particle size of more than 5.0mm is formed finally by scabbling
The total area should account for 20-30% of the treated area. The roughness is controlled within +/-2 mm-3 mm, the aggregate cannot be damaged, the scabbling quality is good, but the processing speed is relatively slow, the requirement on the construction speed is low, and the method can be applied to a bin surface with the area not more than 500m 2. Chiseling the vertical joint surface of the new and old concrete and chiseling the concrete panel part of which the upstream surface is provided with the crack-stopping reinforcing steel bar; in order to prevent the quality of the rock-fill concrete from being influenced by the vibration of an electric (pneumatic) pick in the scabbling process, scabbling is started after the concrete is finally set and the strength reaches more than 10 MPa. In the process of chiseling, the chiseling points are as dense as possible, and the interlayer seam surfaces are guaranteed to be all rough surfaces. After the electric (pneumatic) pick is roughened, the treatment surface must be washed clean by water, and the laitance and the residue are cleaned off to ensure the root is clean.
In the step 2, measurement paying-off is firstly carried out before the templates are installed, the templates are installed according to the positions provided by the measurement paying-off, the supporting form of the templates is the same as that of common concrete, corresponding support is adopted according to the structural form of a building, cantilever templates are adopted, the top of each template adopts a counter-pulling form after stockpiling materials are put in a warehouse, the height of each pouring layer is 1.50m, and each template is 5m long and 0.8t heavy. The outer side of each template is reinforced by vertical small ridges with the length of 8mm multiplied by 80mm multiplied by 1500mm and 4 longitudinal ridges of 14# channel steel. The small ridge spacing is not more than 300mm, the upper opening and the lower opening are respectively provided with a sealing steel plate and then are transversely connected by bolts, the upper opening is fixed by split bolts, the longitudinal and transverse spacing of the bolts is not more than 1000mm, and the split bolts are connected with turnbuckle screws by phi 14 III-grade steel bars and are adjusted to be proper in tightness and play a role in restraining the template; and (3) dismantling the formwork, namely dismantling the formwork when the strength of the concrete of the side formwork is not less than 2.5Mpa and the edges and corners of the side formwork are not damaged by dismantling the formwork.
Sealing the splicing seams of the templates: the transverse and vertical abutted seams are sealed by adhesive tapes except for the double-faced adhesive tapes, the lower opening of the template is sealed by plastering mortar, and the abutted seams and the lower opening of the template are sealed by double-layer double-faced adhesive tapes.
Step 3, screening out stones with the particle size of less than 200mmm before the rockfill is put into the field, and cleaning soil, ash layers and mud blocks attached to the surfaces of the stones; cleaning the mud blocks brought to the surface of the rock-fill silo, dispersing relatively concentrated small-grain-size rock blocks, wherein the maximum grain size of the rock-fill blocks should not exceed 1/4 of the minimum side length of the structural section and 1/2 of the thickness of the rock-fill blocks. The rock-fill material has a saturated compressive strength of not less than 30 MPa; the soil attached to the surface of the stone must be cleaned, the mud content is less than or equal to 0.2 percent, and the mud block content is 0.
The block stone is fresh and complete in material, hard in texture, free of peeling layer and crack and smaller than 30cm in grain size
The soil attached to the surface of the stone must be cleaned, and the piled stone yard needs to be hardened and has smooth drainage so as to avoid bringing the soil into the warehouse when the stone is piled.
In the step 4, the variation of the water-cement ratio cannot exceed the range of +/-0.02-0.01, the dosage of the sand and stone can be adjusted within the range of +/-5%, and the dosage of the water can be adjusted within the range of +/-10 Kg-20 Kg.
And 5, adding 0.5-0.8 m of 3 clear water into the conveying bin before self-compacting concrete to wet and clean the pump pipe.
In the step 6, the cold joint formed by too large natural flow of concrete and slow supply of concrete is avoided in the pouring process, the slump of the concrete is controlled to be 250-280 mm, the concrete flows naturally, the concrete is guaranteed to be covered by the upper concrete before initial setting, the pouring height is controlled during pouring of the concrete, and the concrete surface is 10-20 cm lower than the rock surface in general, so that the bonding of the next bin is facilitated.
And 7, continuously curing the concrete, wherein the surface of the concrete is kept wet all the time in the curing period, the curing time is not shorter than 28 days, and the curing time is properly prolonged for parts with special requirements. Arranging special maintenance workers in high-temperature seasons, and continuously spraying water to the poured concrete surface for maintenance, wherein the concrete surface is kept moist continuously and stops when the next storehouse starts to pile stones.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A self-compacting rock-fill concrete construction process is characterized in that: the method comprises the following steps:
step 1: treating the surface of a basic bin; firstly, loose rock blocks, impurities, soil and the like are removed, the materials are washed clean without accumulated water, then the materials are washed to be rough by a high-pressure water gun, and finally an electric air pick is used for chiseling;
step 2: installing a template; before the construction of the template engineering, the geometric dimension is designed according to the engineering structure, the strength, the rigidity and the stability of the template support are ensured, and the template is formed by combining a steel template and a bamboo plywood;
and step 3: stacking the stones; when the strength of the concrete reaches more than 2.5MPa, stacking materials are stacked;
and 4, step 4: mixing self-compacting concrete; putting the water cement, the sand stone, the water and the fly ash into a stirrer to be stirred to obtain self-compacting concrete;
and 5: self-compacting concrete transportation; the self-compacting concrete obtained in the step 4 is transported to the bottom of the dam by a concrete tank truck, then is pumped to the surface of a bin by a 75-type concrete delivery pump, and is distributed by a tower crane matched with a distributing machine, so that the delivery quality of the concrete and the continuity of the pouring process can be ensured;
step 6: pouring self-compacting concrete; firstly, checking whether a bin surface is clean and wet, cleaning up sundries and tools on the bin surface and loosening stones, and then putting the bin into a bin by adopting a pumping mode, wherein the sequence is that casting points are arranged in a unidirectional mode from upstream to downstream;
and 7: curing the self-compacting concrete; after the high-self-compactness rockfill concrete is poured, sun exposure should be avoided before maintenance, and water spraying maintenance is started within 6-18 h after the rockfill concrete is poured.
2. The self-compacting rock-fill concrete construction process of claim 1, wherein in step 1, roughening is performed to form rough pitted surface and expose small stones.
3. The self-compacting rock-fill concrete construction process of claim 1, wherein in the step 2, before the formwork is installed, a measuring line is firstly arranged, the formwork is installed according to the position provided by the measuring line, the supporting form of the formwork is the same as that of common concrete, and corresponding support is adopted according to the structural form of a building.
4. The self-compacting rock-fill concrete construction process of claim 3, wherein the template butt joint is sealed: the transverse and vertical abutted seams are sealed by tapes except the double faced adhesive tapes, and the lower opening of the template is sealed by plastering mortar.
5. The self-compacting rock-fill concrete construction process of claim 1, wherein in step 3, before the rock-fill is put into the yard, stones with a particle size of less than 200mmm are screened out, and soil, ash layers and mud blocks attached to the surfaces of the stones are cleaned; cleaning the mud blocks brought into the surface of the rock-piling bin, and dispersing relatively concentrated small-particle-size block stones.
6. The self-compacting rock-fill concrete construction process of claim 5, wherein the rock blocks are fresh and intact, hard without spalling and cracks, and are separately transported and dispersedly stacked with a particle size of less than 30 cm.
7. The self-compacting rock-fill concrete construction process of claim 1, wherein in the step 4, the water-cement ratio cannot be changed beyond the range of plus or minus 0.02-0.01, the dosage of the gravels can be adjusted within the range of plus or minus 5%, and the dosage of the water can be adjusted within the range of plus or minus 10 Kg-20 Kg.
8. The self-compacting rock-fill concrete construction process of claim 1, wherein in the step 5, before the self-compacting concrete, 0.5-0.8 m3 of clear water is added into a conveying bin to wet and clean a pump pipe.
9. The self-compacting rock-fill concrete construction process of claim 1, wherein in the step 6, the concrete is prevented from flowing too much naturally and being supplied slowly to form cold seams in the casting process, and the slump of the concrete is controlled within a range of 250mm to 280mm, so that the concrete flows naturally and is covered by the upper concrete before initial setting.
10. The self-compacting rock-fill concrete construction process of claim 1, wherein in the step 7, the concrete is continuously cured, the surface of the concrete is kept wet all the time in the curing period, and the curing time is not shorter than 28 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010891457.1A CN112049421A (en) | 2020-08-30 | 2020-08-30 | Self-compacting rock-fill concrete construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010891457.1A CN112049421A (en) | 2020-08-30 | 2020-08-30 | Self-compacting rock-fill concrete construction process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112049421A true CN112049421A (en) | 2020-12-08 |
Family
ID=73607029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010891457.1A Pending CN112049421A (en) | 2020-08-30 | 2020-08-30 | Self-compacting rock-fill concrete construction process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112049421A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2595113A1 (en) * | 1985-11-07 | 1987-09-04 | Tampella Oy Ab | METHOD AND DEVICE FOR DISTRIBUTING CONCRETE INTO A DRILLING HOLE FOR ROCK ENHANCEMENT |
| CN101144279A (en) * | 2007-09-14 | 2008-03-19 | 清华大学 | Jackstone-type rockfill concrete construction method |
| CN101831985A (en) * | 2010-06-04 | 2010-09-15 | 北京万科企业有限公司 | Precast concrete wallboard and preparation method thereof |
| CN103898877A (en) * | 2014-04-18 | 2014-07-02 | 清华大学 | Rock-fill concrete construction method |
| CN205024685U (en) * | 2015-10-13 | 2016-02-10 | 北京华石纳固科技有限公司 | Cloth machine suitable for enrockment concrete placement |
| PH12017501962A1 (en) * | 2015-04-29 | 2018-03-19 | Dredging Int N V | Scour protection for an underwater bottom alongside a quay wall, and method for providing the same |
| CN208328936U (en) * | 2018-05-14 | 2019-01-04 | 中水电第十一工程局（郑州）有限公司 | A kind of cast-in-place concrete slope enters warehouse channel |
| CN110820750A (en) * | 2019-11-20 | 2020-02-21 | 西藏开投金桥水电开发有限公司 | Self-compacting concrete construction method |
| CN110847351A (en) * | 2019-11-20 | 2020-02-28 | 西藏开投金桥水电开发有限公司 | Construction method of rock-fill concrete |
| CN110886274A (en) * | 2019-11-21 | 2020-03-17 | 贵州水务建设工程有限公司 | Self-compacting rock-fill concrete gravity dam body structure and construction method thereof |
-
2020
- 2020-08-30 CN CN202010891457.1A patent/CN112049421A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2595113A1 (en) * | 1985-11-07 | 1987-09-04 | Tampella Oy Ab | METHOD AND DEVICE FOR DISTRIBUTING CONCRETE INTO A DRILLING HOLE FOR ROCK ENHANCEMENT |
| CN101144279A (en) * | 2007-09-14 | 2008-03-19 | 清华大学 | Jackstone-type rockfill concrete construction method |
| CN101831985A (en) * | 2010-06-04 | 2010-09-15 | 北京万科企业有限公司 | Precast concrete wallboard and preparation method thereof |
| CN103898877A (en) * | 2014-04-18 | 2014-07-02 | 清华大学 | Rock-fill concrete construction method |
| PH12017501962A1 (en) * | 2015-04-29 | 2018-03-19 | Dredging Int N V | Scour protection for an underwater bottom alongside a quay wall, and method for providing the same |
| CN205024685U (en) * | 2015-10-13 | 2016-02-10 | 北京华石纳固科技有限公司 | Cloth machine suitable for enrockment concrete placement |
| CN208328936U (en) * | 2018-05-14 | 2019-01-04 | 中水电第十一工程局（郑州）有限公司 | A kind of cast-in-place concrete slope enters warehouse channel |
| CN110820750A (en) * | 2019-11-20 | 2020-02-21 | 西藏开投金桥水电开发有限公司 | Self-compacting concrete construction method |
| CN110847351A (en) * | 2019-11-20 | 2020-02-28 | 西藏开投金桥水电开发有限公司 | Construction method of rock-fill concrete |
| CN110886274A (en) * | 2019-11-21 | 2020-03-17 | 贵州水务建设工程有限公司 | Self-compacting rock-fill concrete gravity dam body structure and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 土木工程网: "自密实堆石混凝土在重力坝的运用", 《HTTP://WWW.CIVILCN.COM/SHUILI/LUNWEN/SLSG/1470619121277878.HTML》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106192907B (en) | Add the construction method of 150m~300m grade high concrete panel rock-fill dams of cement sand and gravel structure sheaf | |
| CN102535296B (en) | Construction method of superheavy-load reinforcement-free large-area seamless epoxy self-leveling terrace | |
| CN103821364A (en) | Method for constructing reinforced concrete pond | |
| CN108005387B (en) | Synchronous construction method for cast-in-place main body of assembled wallboard and short-limb shear wall | |
| CN104372890A (en) | Construction method of bare concrete prefabricated box beam with complicated structure | |
| CN105839850A (en) | Basement reverse-construction scape post-casting pre-stressed construction method | |
| CN103615053A (en) | Construction method for post-cast belt of cast-in-place reinforced concrete structure | |
| CN105666687A (en) | Construction process for pre-stress reactive powder concrete box girder | |
| CN104929365A (en) | Composite surface construction technology for garbage discharging platform of garbage incineration power plant | |
| CN108330902B (en) | Construction method for cast-in-situ lower cross beam of high-pile wharf | |
| CN111350268A (en) | Construction method of concrete structure self-waterproof system in sewage treatment engineering | |
| CN112282294A (en) | Construction method of steel fiber wear-resistant terrace | |
| CN105951842B (en) | Reversed beam styrofoam fetal membrane construction method under raft plate | |
| CN107142902B (en) | High head and large flow tunneling boring damming method | |
| CN113898104A (en) | Concrete construction system for large-gradient special-shaped inclined roof and construction method thereof | |
| CN110004787A (en) | Pier storage yard road concrete surface construction method | |
| CN210117716U (en) | Trapezoidal foundation ditch lateral wall concrete typical forms of elevartor shaft | |
| CN106337566A (en) | High-strength repairing method for hole of cement prefabricated component | |
| CN112049421A (en) | Self-compacting rock-fill concrete construction process | |
| CN111549690A (en) | Low-cost and high-performance rainwater box culvert combined structure and construction method thereof | |
| CN111042310A (en) | Basement bottom plate structure and construction method thereof | |
| CN108130889B (en) | Manufacturing method of stepped construction joint between main bottom plate of pump brake and side wall of runner layer | |
| CN206736662U (en) | A kind of job site pin-connected panel precast concrete temporary road | |
| CN115613595A (en) | Application of waste concrete as backfill material and backfill construction method thereof | |
| CN114809000A (en) | Rapid construction method of prefabricated plate brick moulding bed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201208 |