CN111827465A - Reinforced rockfill concrete structure and construction method thereof - Google Patents
Reinforced rockfill concrete structure and construction method thereof Download PDFInfo
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- CN111827465A CN111827465A CN202010608113.5A CN202010608113A CN111827465A CN 111827465 A CN111827465 A CN 111827465A CN 202010608113 A CN202010608113 A CN 202010608113A CN 111827465 A CN111827465 A CN 111827465A
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- E—FIXED CONSTRUCTIONS
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- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
- E04B1/167—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material with permanent forms made of particular materials, e.g. layered products
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- E—FIXED CONSTRUCTIONS
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- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E02D2300/00—Materials
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Abstract
The invention discloses a reinforced rockfill concrete structure and a construction method thereof. The construction method comprises the following steps: after the bottom steel bars and the vertical steel bars are arranged according to the design requirement, self-compacting concrete which can completely cover the bottom steel bars and has the thickness not less than 150 mm-300 mm larger than the steel bars is poured; adopting a stone throwing type rockfill concrete process to throw the rock blocks meeting the set particle size requirement into self-compacting concrete containing coarse aggregate; and (5) continuing to construct the top surface of the structure according to a riprap type rockfill concrete process or a common rockfill concrete construction process, and finishing the pouring process. The invention combines the rock-fill concrete and the reinforced concrete, is suitable for mass concrete structures with reinforcing bars at the bottom, around, on the top and inside, and has the advantages of less cement consumption, low hydration temperature rise, easy continuous construction and the like.
Description
Technical Field
The invention relates to a concrete structure and a construction method, in particular to a large-volume concrete structure with peripheral reinforcing bars and a small amount of internal reinforcing bars, and a matched construction method thereof.
Background
The large-volume concrete is an important component in concrete engineering, reinforcement requirements are often made on the large-volume concrete in actual engineering to form a large-volume reinforced concrete structure, the structure is generally applied to the engineering of bridges, water gates, subways, high-rise buildings and the like, and the traditional large-volume concrete construction method is high in cement consumption, difficult in temperature control, easy to crack and high in cost due to the fact that the large-volume reinforced concrete structure is easy to crack.
Rockfill concrete (gold peak, andenhui, rockfill concrete dam construction method, ZL03102674.5) uses a large amount of large-particle-size rock blocks or pebbles, not only saves cement consumption and reduces cost, but also greatly reduces hydration heat and simplifies temperature control, and has been widely applied to dam engineering. The rockfill concrete construction process can be divided into a common rockfill concrete construction method (Jinfeng, Anxue, Xiaoyuanxiao and the like. the common rockfill concrete construction method, ZL200710100315.3) and a rockfill type rockfill concrete construction method (Anxue, Jinfeng, Xiaoyuanxiao and the like. the rockfill type rockfill concrete construction method, ZL 200710121791.3). Ordinary type rock-fill concrete transports the rock-fill that satisfies the requirement earlier to the storehouse face and piles up naturally, then uses the self-compaction concrete that satisfies the requirement to pour from the rock-fill body surface, only relies on self-compaction concrete dead weight to fill the rock-fill space, forms the rock-fill concrete that is fine and close and have higher strength. The riprap type rock-fill concrete is that self-compaction concrete with excellent segregation resistance and good plasticity retention performance is poured into a bin, and then block stones or pebbles are thrown into the poured self-compaction concrete in a mechanical or manual mode to finally form complete and compact rock-fill concrete. The rockfill concrete simplifies the construction process and required equipment, and the construction speed is greatly improved; a large amount of stones and pebbles are used, and each rock-fill concrete only needs 40-50% of concrete, so that the cost of the concrete is effectively reduced by over 30%, and the problem of hydration heat of mass concrete is effectively solved. However, the rock-fill concrete is only used in large-volume concrete structures such as dams, and when large-volume reinforced concrete is adopted and reinforcing steel bars need to be arranged at the bottom of a warehouse surface or in the warehouse surface, the reinforcing steel bars can be broken by the rock-fill, so that the traditional rock-fill concrete technology cannot be directly applied to the large-volume reinforced concrete structures.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a reinforced rockfill concrete structure and a construction method thereof, which apply the advantages of the rockfill concrete technology to large-volume concrete engineering containing reinforcement requirements, particularly peripheral reinforcement and a small amount of internal reinforcement design requirements, widen the application range of the rockfill concrete, and solve the problems of difficult temperature control and higher cost of large-volume reinforced concrete in the engineering of bridges, water gates, subways, high-rise buildings and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a reinforced rockfill concrete structure which is characterized by comprising a steel bar or a substitute thereof and rockfill concrete; the reinforcing steel bars or the substitutes thereof are arranged according to the design requirements and are arranged at the bottom, the periphery, the top and the inside of the bin surface; the rockfill concrete comprises rockfill and self-compacting concrete, wherein the rockfill adopts blocky stones or pebbles, the saturated compressive strength of the rockfill exceeds the compressive strength requirement of large-volume reinforced concrete, and the minimum particle size of the rockfill is 50 mm; when the riprap type rockfill concrete is adopted, the maximum particle size of the rockfill is not more than 500 mm; when the common type rock-fill concrete is adopted, the maximum particle size of the rock-fill does not exceed the transportation capacity of the construction machinery, and is smaller than 1/8-1/4 of the structure size or the thickness of a pouring layer; the self-compacting concrete contains coarse aggregate, the maximum grain size of the coarse aggregate is 10-20 mm, and the performance of the self-compacting concrete can meet the design requirement of large-volume reinforced concrete; laying reinforcing steel bars or substitutes thereof at the bottom and the inside of the bin surface, and pouring the self-compacting concrete which can completely cover the corresponding reinforcing steel bars or the substitutes thereof and has the thickness not less than 150-300 mm larger than the corresponding reinforcing steel bars or the substitutes thereof to form a protective layer; and pouring the self-compacting concrete which can completely cover the reinforcing steel bars or the substitutes thereof and reach the designed height of the top of the warehouse surface at the positions where the reinforcing steel bars or the substitutes thereof are laid on the top of the warehouse surface.
The invention also provides a construction method of the reinforced rockfill concrete structure, which is characterized by comprising the following steps:
1) arranging bottom steel bars or substitutes thereof and peripheral steel bars or substitutes thereof on the surface of a bin in which the rock-fill concrete is required to be poured, and arranging templates or template substitutes;
2) the bottom of the bin surface is constructed by adopting a riprap type rock-fill concrete construction method, the self-compacting concrete which can completely cover the bottom reinforcing steel bar or the substitute thereof and has the thickness not less than 150 mm-300 mm larger than the reinforcing steel bar or the substitute thereof is poured, and then the rockfill with the grain diameter of 50 mm-500 mm is uniformly thrown into the self-compacting concrete;
3) continuously throwing stones into the bin surface and simultaneously pouring self-compacting concrete, and continuously carrying out stone throwing type rock-fill concrete construction until the bin surface pouring is finished; or only adopting riprap type rockfill concrete construction at the bottom, continuously filling the rockfill with the particle size of 50-500 mm to a set height after finishing the riprap type rockfill concrete construction, adopting a common rockfill concrete process, and pouring self-compacting concrete to fill and compact the rockfill gaps in the template or the substitute thereof until the rockfill reaches the designed height of the top of the warehouse surface.
Further, when steel bars or substitutes thereof are required to be laid inside the bin face according to design requirements, the step 3) is replaced by the following steps: firstly, constructing the rock-fill concrete to be lower than the height of the internal steel bar or the substitute thereof, and then laying the steel bar or the substitute thereof; then pouring the self-compacting concrete which completely covers the reinforcing steel bar or the substitute thereof and exceeds the thickness of the reinforcing steel bar or the substitute thereof by not less than 150 mm-300 mm, and then uniformly throwing the rockfill into the poured self-compacting concrete by adopting a construction process of the riprap type rockfill concrete; and continuously throwing stones into the bin surface and simultaneously pouring self-compacting concrete, and continuously carrying out stone throwing type rock-fill concrete construction until the bin surface pouring is finished.
Further, when steel bars or substitutes thereof are laid on the top of the bin surface according to design requirements, the step 3) further comprises the following steps: when the rock-fill concrete is constructed to the design height of the steel bars or the substitutes thereof at the top of the bin surface, the steel bars or the substitutes thereof at the top are arranged; and pouring the self-compacting concrete which can completely cover the steel bars at the top or substitutes thereof and reach the designed height of the top of the warehouse surface.
The invention provides a reinforced rockfill concrete structure and a construction method thereof, which combines rockfill concrete and reinforced concrete on the basis of the existing rockfill concrete structure and construction method. Compared with the existing large-volume concrete structure and construction method, the invention has the following advantages: compared with the existing rockfill concrete structure, the bottom, the periphery, the top and the inside of the pouring bin surface of the structure can be provided with reinforcing steel bars so as to meet the design requirement; compared with common mass concrete, the invention pours the middle part of the storehouse surface into rock-fill concrete, and the actual field test verifies that the rock-fill rate can reach 50 percent in the construction, thereby greatly reducing the cement consumption and the hydration heat of the concrete, and further canceling the isothermal control measure of the embedded cooling water pipe; the self-compacting concrete poured in advance when the stone-throwing type rock-fill concrete is used for construction can protect the reinforcing steel bars and prevent the reinforcing steel bars from being broken by rock-fill; the construction method adopts the construction method of the riprap type rock-fill concrete and the common rock-fill concrete for construction, so that the requirements on construction equipment can be further reduced, the construction process is accelerated, and the construction cost is reduced.
Drawings
Fig. 1 is a schematic view of a reinforced rockfill concrete structure according to an embodiment of the present invention.
FIGS. 2, 3 and 4 are schematic diagrams illustrating the construction process of a reinforced rockfill concrete structure provided with bottom horizontal steel bars, peripheral vertical steel bars and top horizontal steel bars;
fig. 5 and 6 are schematic diagrams of the construction process for arranging the internal horizontal steel bar in the reinforced rockfill concrete structure.
FIGS. 7 and 8 are schematic diagrams of the construction process of the reinforced rockfill concrete structure with reinforcement requirements on the inner part and the top;
fig. 9 is a schematic structural view of the finished reinforced rock-filled concrete with internal reinforcing bars.
Reference numerals:
1: bottom horizontal steel bars; 2: vertical steel bars on the periphery; 3: a template or template substitute; 4: self-compacting concrete; 5: stacking the stones; 6: top horizontal steel bars; 7: internal horizontal steel bars; 8: and a protective layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
For better understanding of the present invention, an application example of a reinforced rockfill concrete structure and a construction method thereof according to the present invention will be described in detail below.
The invention introduces the steel bar configuration on the basis of the prior rockfill concrete technology, and the construction is carried out by combining the riprap rockfill concrete construction method and the common rockfill concrete construction method, so as to finally form a complete and compact reinforced rockfill concrete structure which can meet the structural reinforcement requirement. The following further illustrates embodiments of the invention in conjunction with the drawings:
the invention relates to a reinforced rockfill concrete structure, which is shown in figure 1 and comprises steel bars (1, 2, 6 and 7) or substitutes thereof (such as steel plates, steel bar trusses, prestressed steel strands and the like) and rockfill concrete, wherein the steel bars or substitutes thereof (1, 2, 6 and 7) are positioned in a template or substitutes 3 thereof. The steel bars or substitutes thereof are arranged according to the design requirements and can be arranged at the bottom, the periphery, the top and the inside of the bin surface (such as a bottom horizontal steel bar 1, a peripheral vertical steel bar 2, a top horizontal steel bar 6 and an inner horizontal steel bar 7 shown in figure 1). The rock-fill concrete includes: the rock-fill material comprises rockfill 5 and self-compacting concrete 4, wherein the rockfill 5 adopts blocky rocks or pebbles, the saturated compressive strength of the rockfill 5 exceeds the compressive strength requirement of large-volume reinforced concrete, and the minimum particle size is 50 mm; when the riprap type rockfill concrete is adopted, the maximum particle size of the rockfill is not more than 500 mm; when the common rockfill concrete is adopted, the maximum particle size of the rockfill does not exceed the transportation capacity of construction machinery, and is smaller than 1/8-1/4 of the size of a reinforced rockfill concrete structure or the thickness of a pouring layer. The self-compacting concrete 4 contains a certain amount of coarse aggregate, the maximum grain size of the coarse aggregate is 10-20 mm, and the performance (mainly comprising slump, expansion, V-shaped funnel passing time, compressive strength and the like) of the self-compacting concrete should meet the design requirement of large-volume reinforced concrete. And (3) laying reinforcing steel bars or substitutes thereof at the bottom and the inside of the bin surface, pouring self-compacting concrete 4 (the self-compacting concrete requires excellent segregation resistance and good plasticity retention property) which can completely cover the corresponding reinforcing steel bars or substitutes and has the thickness not less than 150-300 mm more than the corresponding reinforcing steel bars or substitutes so as to form a protective layer 8, and then constructing the rest reinforcing steel bars and the rock-fill concrete.
The invention also provides a construction method of the reinforced rockfill concrete structure, which can be used for reinforcing the large-volume concrete structure according to the design requirement and is constructed according to the following steps:
1) referring to fig. 2, according to design requirements, arranging bottom horizontal steel bars 1 and peripheral vertical steel bars 2 for a cabin surface required to be poured with rock-fill concrete in large-volume reinforced concrete, and arranging a template or template substitute 3;
2) the bottom of the bin surface is constructed by adopting a stone-throwing type rock-fill concrete construction method, the self-compacting concrete 4 which can completely cover the bottom horizontal reinforcing steel bar 1 and is not less than 150 mm-300 mm in thickness and exceeds the bottom horizontal reinforcing steel bar is poured to form a protective layer 8 of the bottom reinforcing steel bar, see figure 2, and then the rock-fill 5 with the grain diameter of 50 mm-500 mm is uniformly thrown into the poured self-compacting concrete 4, see figure 3; the performance requirements of the self-compacting concrete should meet: slump of 250-290 mm, expansion of 500-700 mm and passing time of a V-shaped funnel of 5-30 s;
3) continuing to throw stones into the bin face and simultaneously pouring self-compacting concrete 4, and continuously carrying out stone throwing type rock-fill concrete construction (determining the thickness of the self-compacting concrete poured at one time according to the stone throwing speed, and finishing stone throwing work before the performance loss of the poured self-compacting concrete exceeds a lower limit standard) until the bin face is poured, and referring to fig. 4; or only adopting riprap type rock-fill concrete construction at the bottom of the bin surface, after finishing the riprap type rock-fill concrete construction, continuously filling 150 mm-1200 mm rock-fill to a set height (the height is related to the construction capability, the riprap type rock-fill concrete can be continuously constructed for dozens of meters as long as the construction capability meets the requirement, when the bin surface is larger, the pouring speed needs to ensure that the concrete cannot be initially set), then adopting a common rock-fill concrete construction process, and pouring self-compacting concrete 4 to fill and compact the rock-fill gaps in the template or template substitute 3 until the rock-fill concrete is poured to the designed height of the top of the bin surface. The performance requirements of the self-compacting concrete used for the construction of common rock-fill concrete are as follows: the slump is 250 mm-290 mm, the expansion degree is 600 mm-800 mm, and the passing time of the V-shaped funnel is 5 s-30 s.
Further, referring to fig. 5 and 6, when the internal horizontal steel bars 7 are laid according to the design requirements, the rock-fill concrete is firstly constructed to be below the design height of the internal horizontal steel bars 7, then the internal horizontal steel bars 7 are laid, then the self-compacting concrete which can completely cover the internal horizontal steel bars 7 and is not less than 150 mm-300 mm in thickness is poured, the cushion effect is achieved, the steel bars are protected from being damaged by the riprap, then the construction process of the riprap type rock-fill concrete is adopted, the riprap is uniformly poured into the poured self-compacting concrete, and then the design height of the top of the warehouse surface is poured according to the operation of the step 3).
Further, referring to fig. 7 to 9, when the top horizontal steel bars 6 are laid according to the design requirements, the rock-fill concrete is firstly constructed below the design height of the top horizontal steel bars 6, and then the top horizontal steel bars 6 are laid; and pouring self-compacting concrete 4 which can completely cover the top horizontal reinforcing steel bars 6 and reach the designed height of the top of the warehouse surface.
Furthermore, when the bin surface is large or other reasons need to reach a certain height (such as below the height of the internal horizontal steel bars) inside the bin surface, the pouring stop time exceeds the initial setting time of the self-compacting concrete, and the top surface of the self-compacting concrete at the pouring stop time is lower than the rockfill, so that part of the rockfill is exposed out of the top of the self-compacting concrete, and the bonding strength of the upper layer of concrete and the lower layer of concrete is ensured.
Further, the top surface of the self-compacting concrete which is poured intermittently is required to be maintained, and the construction of the upper self-compacting concrete is carried out after the strength of the concrete reaches 2.5 MPa; the top surface of the self-compacting concrete which is poured and stopped can be roughened or brushed so as to meet the anti-permeability requirement or the strength requirement of the reinforced rockfill concrete structure.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A reinforced rockfill concrete structure is characterized by comprising reinforcing steel bars or substitutes thereof and rockfill concrete; the reinforcing steel bars or the substitutes thereof are arranged according to the design requirements and are arranged at the bottom, the periphery, the top and the inside of the bin surface; the rockfill concrete comprises rockfill and self-compacting concrete, wherein the rockfill adopts blocky stones or pebbles, the saturated compressive strength of the rockfill exceeds the compressive strength requirement of large-volume reinforced concrete, and the minimum particle size of the rockfill is 50 mm; when the riprap type rockfill concrete is adopted, the maximum particle size of the rockfill is not more than 500 mm; when the common type rock-fill concrete is adopted, the maximum particle size of the rock-fill does not exceed the transportation capacity of the construction machinery, and is smaller than 1/8-1/4 of the structure size or the thickness of a pouring layer; the self-compacting concrete contains coarse aggregate, the maximum grain size of the coarse aggregate is 10-20 mm, and the performance of the self-compacting concrete can meet the design requirement of large-volume reinforced concrete; laying reinforcing steel bars or substitutes thereof at the bottom and the inside of the bin surface, and pouring the self-compacting concrete which can completely cover the corresponding reinforcing steel bars or the substitutes thereof and has the thickness not less than 150-300 mm larger than the corresponding reinforcing steel bars or the substitutes thereof to form a protective layer; and pouring the self-compacting concrete which can completely cover the reinforcing steel bars or the substitutes thereof and reach the designed height of the top of the warehouse surface at the positions where the reinforcing steel bars or the substitutes thereof are laid on the top of the warehouse surface.
2. A construction method of the reinforced rockfill concrete structure according to claim 1, comprising the steps of:
1) arranging bottom steel bars or substitutes thereof and peripheral steel bars or substitutes thereof on the surface of a bin in which the rock-fill concrete is required to be poured, and arranging templates or template substitutes;
2) the bottom of the bin surface is constructed by adopting a riprap type rock-fill concrete construction method, the self-compacting concrete which can completely cover the bottom reinforcing steel bar or the substitute thereof and has the thickness not less than 150 mm-300 mm larger than the reinforcing steel bar or the substitute thereof is poured, and then the rockfill with the grain diameter of 50 mm-500 mm is uniformly thrown into the self-compacting concrete;
3) continuously throwing stones into the bin surface and simultaneously pouring self-compacting concrete, and continuously carrying out stone throwing type rock-fill concrete construction until the bin surface pouring is finished; or only adopting riprap type rockfill concrete construction at the bottom, continuously filling the rockfill with the particle size of 50-500 mm to a set height after finishing the riprap type rockfill concrete construction, adopting a common rockfill concrete process, and pouring self-compacting concrete to fill and compact the rockfill gaps in the template or the substitute thereof until the rockfill reaches the designed height of the top of the warehouse surface.
3. The construction method of a reinforced rockfill concrete structure according to claim 2, wherein when it is required to lay reinforcing steel bars or substitutes thereof inside the deck according to design requirements, step 3) is replaced by the steps of: firstly, constructing the rock-fill concrete to be lower than the height of the internal steel bar or the substitute thereof, and then laying the steel bar or the substitute thereof; then pouring the self-compacting concrete which completely covers the reinforcing steel bar or the substitute thereof and exceeds the thickness of the reinforcing steel bar or the substitute thereof by not less than 150 mm-300 mm, and then uniformly throwing the rockfill into the poured self-compacting concrete by adopting a construction process of the riprap type rockfill concrete; and continuously throwing stones into the bin surface and simultaneously pouring self-compacting concrete, and continuously carrying out stone throwing type rock-fill concrete construction until the bin surface pouring is finished.
4. The construction method of a reinforced rockfill concrete structure according to claim 2 or 3, wherein when the reinforcing steel bars or their substitutes are laid on the top of the warehouse as required by design, the step 3) further comprises the steps of: when the rock-fill concrete is constructed to the design height of the steel bars or the substitutes thereof at the top of the bin surface, the steel bars or the substitutes thereof at the top are arranged; and pouring the self-compacting concrete which can completely cover the steel bars at the top or substitutes thereof and reach the designed height of the top of the warehouse surface.
5. The method for constructing a reinforced rockfill concrete structure according to claim 4, wherein the casting stop time exceeds the initial setting time of the self-compacting concrete when the bin surface is large or reaches a set height in the bin for other reasons, and the top surface of the self-compacting concrete at the casting stop time is lower than the rockfill to ensure that part of the rockfill is exposed out of the top of the self-compacting concrete and the bonding strength of the upper and lower layers of concrete is ensured.
6. The construction method of a reinforced rockfill concrete structure according to claim 5, wherein the top surface of the self-compacting concrete which is poured intermittently should be maintained, and the upper concrete construction should be performed after the concrete strength reaches 2.5 MPa; and (4) roughening or impacting the top surface of the self-compacting concrete after the pouring is stopped so as to meet the anti-permeability requirement or strength requirement of the reinforced rockfill concrete structure.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113211649A (en) * | 2021-05-20 | 2021-08-06 | 李友彬 | Method for cutting, processing and forming rock-fill concrete large test piece |
| CN113279479A (en) * | 2021-05-13 | 2021-08-20 | 中建八局第三建设有限公司 | High-strength concrete structure and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113279479A (en) * | 2021-05-13 | 2021-08-20 | 中建八局第三建设有限公司 | High-strength concrete structure and construction method thereof |
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