CN111648411A - Downward-turning type post-cast strip support replacing structure, construction method and post-cast strip construction method - Google Patents
Downward-turning type post-cast strip support replacing structure, construction method and post-cast strip construction method Download PDFInfo
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- CN111648411A CN111648411A CN202010371707.9A CN202010371707A CN111648411A CN 111648411 A CN111648411 A CN 111648411A CN 202010371707 A CN202010371707 A CN 202010371707A CN 111648411 A CN111648411 A CN 111648411A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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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
- E04B1/0007—Base structures; Cellars
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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
- E04B1/165—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 elongated load-supporting parts, cast in situ
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- 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
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- 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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
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Abstract
The invention discloses a downward-turning post-cast strip support-changing structure, a construction method thereof and a post-cast strip construction method. According to the support replacing structure, the force transmission between the reinforced concrete support replacing plate and the structural floor slab is uniform, the integral horizontal force transmission after the reinforced concrete support replacing plate is connected with the structural floor slab is met, and the structural stability in the building construction process is ensured; the construction efficiency is improved, and the safety protection effect is achieved.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a downward-turning post-cast strip support replacing structure, a construction method thereof and a post-cast strip construction method.
Background
Referring to fig. 1, in the construction of a deep foundation pit, in order to ensure the overall stability of the foundation pit, a post-cast strip support-changing structure 10 is formed in a post-cast strip region 14 between reinforced concrete structural floors 11 provided with reinforcing steel bars. Referring to fig. 1, a conventional post-cast strip support-replacing structure 10 includes a structural floor slab 11 having a first thickness L1 and configured with a steel bar 12 and cast concrete, and i-beam support-replacing plates 13 spaced apart from each other in a post-cast strip region 14 located between the structural floor slabs 11, so as to form a force transmission system for the structural floor slabs 11 on both sides through the i-beam support-replacing plates 13, where the i-beam support-replacing plates 13 have good compressive resistance and poor shear resistance, and the structural floor slab 11 of reinforced concrete has good compressive resistance and good shear resistance, so that the force transmission between the i-beam support-replacing plates 13 and the structural floor slab 11 is not uniform, and the integrity and stability of the overall horizontal force transmission of the structural floor slab cannot be satisfied. Referring to fig. 1 to 2, since the post-cast strip region needs to wait for the capping of the main structure of the building and to pour concrete to form the post-cast strip structure 15 after settling is stable, there are potential safety hazards such as water leakage and high-altitude falling in gaps between the h-shaped steel support plates distributed at intervals before the capping construction of the main structure of the building. In addition, the I-steel trades fagging 13 and need to match post-cast strip region 14 after cutting process, not only cutting process is difficult, still needs engineering machine equipment hoist and mount and transportation operation to the efficiency of construction has been reduced.
Disclosure of Invention
The invention aims to solve the technical problems that a downward-turning post-cast strip support-replacing structure, a construction method thereof and a post-cast strip construction method are provided, so that the problems that the force transmission between a support-replacing plate and a structural floor slab is uneven and the potential safety hazard exists when I-steel in the post-cast strip area is replaced by the support plate are solved.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a downward-turning type post-cast strip support-changing structure comprises structural floor slabs with first thickness formed on two sides of a post-cast strip area, reinforced concrete side beams with second thickness formed by extending a certain preset distance along the boundary of the post-cast strip area in the direction away from the post-cast strip area to enable the structural floor slabs on the two sides to be downward turned and configured with reinforcing steel bars penetrating through the lower portion of the post-cast strip area, and reinforced concrete support-changing plates located between the reinforced concrete side beams.
Further, the invention provides a support replacing structure for a downward-turning type post-cast strip.
Further, the support replacing structure for the downward-turning type post-cast strip provided by the invention comprises a reinforced concrete side beam and a second reinforcement cage which is transversely arranged in the concrete.
Further, according to the support replacing structure for the downward-turning type post-cast strip, a third reinforcement cage is longitudinally arranged between the second reinforcement cage located in the reinforced concrete side beam area and the corresponding first reinforcement cage.
Further, according to the support replacing structure for the downward-turning type post-cast strip, the thickness of the reinforced concrete edge beam is larger than or equal to that of the structural floor slab.
Further, according to the downward-turning post-cast strip support-replacing structure provided by the invention, the structural floor slab and the reinforced concrete boundary beam are of an integrated structure.
In order to solve the above technical problem, another technical solution provided by the present invention is: a construction method of a downward-turning type post-cast strip support changing structure comprises the following steps:
constructing structural floor slabs and templates of downward-turned reinforced concrete boundary beams on two sides of the post-cast strip area;
at least arranging a first reinforcement cage and a second reinforcement cage in the templates on two sides and pouring concrete to form a structural floor slab and a reinforced concrete edge beam, wherein the first reinforcement cage penetrates through the post-cast strip area, and the second reinforcement cage penetrates below the post-cast strip area;
and pouring concrete between the reinforced concrete side beams to form the reinforced concrete support plate.
Further, according to the construction method of the support changing structure of the downward-turning type post-cast strip, a third reinforcement cage is longitudinally arranged between a second reinforcement cage corresponding to the reinforced concrete boundary beam area and the first reinforcement cage corresponding to the second reinforcement cage in the formwork.
Further, according to the construction method of the downward-turning type post-cast strip support-replacing structure, the structural floor slabs and the downward-turning reinforced concrete side beams of the structural floor slabs are constructed on two sides of the post-cast strip area at the same time or in a time-sharing manner, so that the structural floor slabs on one side of the post-cast strip area and the downward-turning reinforced concrete structure of the structural floor slabs are formed at the same time or in a time-sharing manner.
In order to solve the above technical problem, another technical solution provided by the present invention is: a post-cast strip construction method is characterized in that the downward-turning post-cast strip support changing structure is formed, and a post-cast strip structure is formed by pouring concrete into a first reinforcement cage penetrating through the post-cast strip area.
Compared with the prior art, the support replacing structure of the downward-turning type post-cast strip, the construction method of the support replacing structure and the construction method of the post-cast strip provided by the invention have the advantages that the support replacing plates in the post-cast strip area between the structural floors are reinforced concrete support replacing plates of the reinforced concrete structure, and the stress performance of the compressive resistance and the shearing resistance of the reinforced concrete support replacing plates and the stress performance of the compressive resistance and the shearing resistance of the structural floors of the reinforced concrete structure can be kept consistent, so that the force transmission of the reinforced concrete support replacing plates and the structural floors is uniform, the integral horizontal force transmission after the reinforced concrete support replacing plates are connected with the structural floors is met, and the structural stability in the construction process of buildings is ensured. The invention solves the problem of uneven force transmission caused by poor stress performance of the shearing resistance of the I-steel supporting plate.
Compared with the prior art, the downward-turning post-cast strip support-changing structure, the construction method and the post-cast strip construction method provided by the invention have the advantages that the reinforced concrete side beam is formed by downward-turning construction on the basis of the structural floor slab, the reinforced concrete support-changing plate is positioned between the reinforced concrete side beams below the structural floor slab instead of between the thicknesses of the structural floor slab, so that the downward-turning support-changing plate is formed, the post-cast strip area between the structural floor slabs is still reserved, and the construction of the post-cast strip structure is carried out after the main structure of the building reaches the settlement standard without influencing the roof sealing of the building. Because the reinforced concrete trades fagging and reinforced concrete boundary beam seamless connection, therefore before the major structure of building is not capped, can not produce interval distribution's I-steel and trade the clearance of fagging, then the rainwater can not leak the construction structure below this layer of structure floor, and building engineering waste materials such as concrete piece, silt, reinforcing bar broken end will be traded the fagging by reinforced concrete and obstruct when falling in the high altitude to reduce or even overcome the risk such as personal injury of the construction operation personnel below this layer of structure floor, played the safety protection effect. Compared with the prior art, the method solves the problem of potential safety hazard of the I-steel supporting plate replacement in the post-cast strip area.
Compared with the prior art, the support replacing structure of the downward-turning type post-cast strip, the construction method of the support replacing structure and the construction method of the post-cast strip do not need cutting processing of the I-shaped steel in the process of replacing the supporting plate of the I-shaped steel, and do not need hoisting and transportation operation by using engineering mechanical equipment, so that the construction efficiency is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional concrete post-cast strip support-replacing structure;
FIG. 2 is a schematic cross-sectional view of a post-cast strip structure constructed in the concrete post-cast strip bracing change structure of FIG. 1;
fig. 3 to 5 are schematic sectional structure diagrams of a construction process of a support replacing structure of a downward-turning post-cast strip according to an embodiment of the invention;
FIG. 6 is a schematic cross-sectional view of a construction post-cast strip structure of the turn-down post-cast strip bracing change structure of FIG. 5;
fig. 7 is a schematic cross-sectional view of a reinforcement cage configuration of a turn-down post-cast strip support-replacing structure according to an embodiment of the present invention.
Shown in the figure:
10. the concrete post-cast strip support-replacing structure comprises a concrete post-cast strip support-replacing structure, 11, a structural floor slab, 12, reinforcing bars, 130, I-shaped steel support-replacing plates, 14, a post-cast strip area, 15 and a post-cast strip structure;
100. the downward-turning type post-cast strip support-replacing structure comprises a supporting-replacing structure body, 110, a structural floor slab, 111, a first reinforcement cage, 112, a third reinforcement cage, 113, tie bars, 120, reinforced concrete side beams, 121, a second reinforcement cage, 130, a reinforced concrete support-replacing plate, 140, a post-cast strip area, 150 and a post-cast strip structure.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
referring to fig. 5, an embodiment of the present invention provides a flip-down post-cast supporting structure 100, which includes structural floor slabs 110 with a first thickness L2 formed on two sides of a post-cast strip region 140, reinforced concrete edge beams 120 with a second thickness L2 formed by extending a predetermined distance along a boundary of the post-cast strip region 140 in a direction away from the post-cast strip region 140 so that the structural floor slabs 110 on two sides are flipped down and configured with reinforcing steel bars penetrating through the lower portion of the post-cast strip region 140, and reinforced concrete supporting plates 130 located between the reinforced concrete edge beams 120. The structural floor 110 comprises concrete and a first reinforcement cage 111 disposed laterally within the concrete; the reinforced concrete edge beam 120 comprises concrete and a second reinforcement cage 121 disposed laterally within the concrete.
Referring to fig. 5, in order to integrate the structural floor slab 110 and the reinforced concrete boundary beam 120, the structural floor slab 110 and the reinforced concrete boundary beam 120 according to the embodiment of the present invention are integrated, that is, the structural floor slab 110 and the reinforced concrete boundary beam 120 are an integrated body of a reinforced concrete structure, that is, the structural floor slab 110 and the turned-down reinforced concrete boundary beam 120 are an integrated body, and the integrated body can be formed by placing reinforcing steel bars in a formwork and pouring concrete. Wherein the reinforced concrete edge beam 120 is actually a down-turned beam of the structural floor slab 110. Compared with a split structure of the reinforced concrete side beam 120 which is constructed below the structural floor slab 110 separately in the later construction, the split structure has the characteristics of stable structure, difficulty in loosening and the like. And the integral force transmission performance is better.
Referring to fig. 7, in order to increase the structural strength between the structural floor slab 110 and the reinforced concrete side beam 120, in the turned-down post-cast strip bracing-replacing structure 100 according to the embodiment of the present invention, a third reinforcement cage 112 is longitudinally disposed between the second reinforcement cage 121 located in the reinforced concrete side beam 120 region and the corresponding first reinforcement cage 111. With continued reference to fig. 7, in order to improve the integrity of the structural floor 110 and the reinforced concrete edge beam 120, tie bars 113 are further included and distributed around the first reinforcement cage 111 and the second reinforcement cage 121, and in particular, the tie bars 113 may also surround the third reinforcement cage 112. Referring to fig. 5 and 7, in order to enable the reinforced concrete bracing plate 130 to achieve the effects of stable support and horizontal force transmission, in the support replacing structure 100 of the inverted-type post-cast strip according to the embodiment of the present invention, the thickness of the reinforced concrete edge beam 120 is greater than or equal to the thickness of the structural floor slab 110. Namely L1 is more than or equal to L2.
Referring to fig. 3 to 5, an embodiment of the present invention further provides a construction method of a downward-turning post-cast strip support-replacing structure 100, including:
step one, the structural floor slabs 110 and the formworks (not shown) of the turned-down reinforced concrete side beams 120 thereof are constructed on both sides of the post-cast strip area 140.
Referring to fig. 3 to 4, at least a first reinforcement cage 111 and a second reinforcement cage 121 are arranged in the form at two sides, and concrete is poured to form the structural floor 110 and the reinforced concrete side beam 120, wherein the first reinforcement cage 111 penetrates through the post-cast strip area 140, and the second reinforcement cage 121 penetrates below the post-cast strip area 140. Wherein the thickness L1 of the structural floor 100 includes but is not limited to 200mm and the thickness L2 of the reinforced concrete side rail 120 includes but is not limited to 200 mm. The reinforced concrete edge beam 120 extends laterally along the boundaries of the post-cast strip region 140 a distance including, but not limited to, 400 mm.
And thirdly, referring to fig. 5, pouring concrete between the reinforced concrete edge beams 120 to form the reinforced concrete exchange plate 130.
Referring to fig. 7, in the construction method of the downward-turning post-cast strip support-replacing structure 100 according to the embodiment of the present invention, a third reinforcement cage 112 is longitudinally disposed between a second reinforcement cage 121 corresponding to an area where the reinforced concrete edge beam 120 is formed and the corresponding first reinforcement cage 111. To increase the structural strength of the structural floor 110 and the reinforced concrete edge beam 120 as a whole. The first reinforcement cage 111, the second reinforcement cage 121 and the third reinforcement cage 112 can be matched with specification models of reinforcements according to construction needs.
Referring to fig. 3 or 4, the construction method of the downward-turned type post-cast strip support-replacing structure 100 according to the present invention can construct the structural floor slab 110 and the formwork of the downward-turned reinforced concrete side beam 120 on both sides of the post-cast strip area 140 at the same time or at different times, so that the structural floor slab 110 and the downward-turned reinforced concrete structure on one side of the post-cast strip area 140 are formed at the same time or at different times. The time-sharing construction sequence of the embodiment of the invention is that a template at one side of the post-cast strip area 140 is firstly arranged, and the first reinforcement cage 111 and the second reinforcement cage 121 are arranged in the template to form the structural floor 110 at one side and the reinforced concrete side beam 120 turned downwards. Referring to fig. 3 to 4, the time-sharing construction sequence of the embodiment of the invention may be from left to right, or from right to left according to the construction environment. Referring to fig. 4, in order to improve the construction efficiency, the left and right structural floors 110 and the turned-down reinforced concrete side beams 120 may be constructed at the same time.
Referring to fig. 5 to 6, an embodiment of the invention further provides a post-cast strip construction method, in which the downward-turning post-cast strip support changing structure 100 of the above embodiment is formed, and a post-cast strip structure 150 is formed by pouring concrete into the first reinforcement cage 111 penetrating through the post-cast strip region 140. Wherein the post-cast strip structure 150 is constructed after the building body structure meets the settlement criteria.
According to the support replacing structure 100 of the downward-turning type post-cast strip, the construction method of the support replacing structure 100 and the post-cast strip construction method, the support replacing plates of the post-cast strip area 140 located between the structural floor slabs 110 are reinforced concrete support replacing plates 130 of the reinforced concrete structure, and stress performance of compressive resistance and shearing resistance of the reinforced concrete support replacing plates 130 and stress performance of compressive resistance and shearing resistance of the structural floor slabs 110 of the reinforced concrete structure can be kept consistent, so that force transmission of the reinforced concrete support replacing plates 130 and the structural floor slabs 110 is uniform, integral horizontal force transmission after the reinforced concrete support replacing plates 130 are connected with the structural floor slabs 110 is met, and structural stability in the building construction process is guaranteed. According to the downward-turning post-cast strip support-replacing structure 100, the construction method thereof and the post-cast strip construction method, the reinforced concrete support-replacing plate 130 and the structural floor slabs 110 on two sides of the reinforced concrete support-replacing plate form an integral force transmission system through the reinforced concrete boundary beams 120, and the purpose of horizontal force transmission during construction post-cast strip support replacement is achieved. Compared with the I-steel exchange supporting plate, the invention solves the problem of uneven force transmission caused by poor stress performance of the I-steel exchange supporting plate in shearing resistance.
The invention provides a downward-turning post-cast strip support-changing structure 100, a construction method thereof and a post-cast strip construction method, wherein a reinforced concrete side beam 120 is formed by downward-turning construction on the basis of a structural floor slab 110, a reinforced concrete support-changing plate 130 is positioned between the reinforced concrete side beams 120 below the structural floor slab 110 instead of being formed between the thicknesses of the structural floor slabs 110, so that the downward-turning support-changing plate is formed, a post-cast strip area 140 between the structural floor slabs 110 is still reserved, and the construction of a post-cast strip structure 150 is carried out after the main structure of the building reaches the settlement standard after the roof of the building is sealed. Because the reinforced concrete trades fagging 130 and reinforced concrete boundary beam 120 seamless connection, therefore before the major structure of building is not capped, can not produce the interval distribution's I-steel and trade the clearance of fagging, then the rainwater can not leak the construction structure below this layer of structure floor 110, building engineering waste materials such as concrete piece, silt, reinforcing bar broken end will be traded the fagging by reinforced concrete and will be separated when the high altitude falls to reduce or even overcome the risk such as the personal injury of the construction operation personnel below this layer of structure floor 110, played the safety protection effect. Therefore, the method solves the problem of potential safety hazard of the exchange of the supporting plate of the I-steel of the post-cast strip area 140.
According to the downward-turning post-cast strip support-replacing structure 100, the construction method thereof and the post-cast strip construction method, the I-shaped steel does not need to be cut and processed in the I-shaped steel support-replacing plate process, and the lifting and transportation operation of engineering machinery equipment is not needed, so that the construction efficiency is improved, and the cost is reduced.
The support replacing structure 100 of the downward-turning type post-cast strip, the construction method of the support replacing structure and the post-cast strip construction method are suitable for other structural floor slabs except for a foundation slab in a foundation pit.
The terms "first", "second", "third", and the like used in the embodiments of the present invention are only defined for distinguishing the respective components at different positions, and are not limited to numbers, and should not be construed as limiting the present invention.
The present invention is not limited to the above-described embodiments, and various changes and modifications within the scope of the claims of the present invention are within the scope of the claims of the present invention.
Claims (10)
1. The downward-turning type post-cast strip support-changing structure is characterized by comprising structural floor slabs with first thickness formed on two sides of a post-cast strip area, reinforced concrete side beams with second thickness formed by extending a certain preset distance along the boundary of the post-cast strip area in the direction away from the post-cast strip area to enable the structural floor slabs on the two sides to be turned downward and arranging reinforcing steel bars penetrating through the lower portion of the post-cast strip area, and reinforced concrete support-changing plates located between the reinforced concrete side beams.
2. The inverted post-cast strip resheathing structure of claim 1, wherein the structural floor comprises concrete and a first reinforcement cage disposed laterally within the concrete.
3. The inverted post-cast strip relining structure of claim 2, wherein the reinforced concrete edge beam comprises concrete and a second reinforcement cage disposed laterally within the concrete.
4. The under-turned post-cast strip bracing-replacing structure according to claim 3, wherein a third reinforcement cage is longitudinally arranged between the second reinforcement cage located in the reinforced concrete side beam region and the corresponding first reinforcement cage.
5. The inverted post-cast strip bracing structure according to claim 1, wherein the reinforced concrete edge beam has a thickness greater than or equal to a thickness of the structural floor slab.
6. The inverted post-cast strip shoring structure of claim 1, wherein the structural floor slab is of unitary construction with the reinforced concrete edge beam.
7. A construction method of a turn-down type post-cast strip bracing-replacing structure according to any one of claims 1 to 6, comprising:
constructing structural floor slabs and templates of downward-turned reinforced concrete boundary beams on two sides of the post-cast strip area;
at least arranging a first reinforcement cage and a second reinforcement cage in the templates on two sides and pouring concrete to form a structural floor slab and a reinforced concrete edge beam, wherein the first reinforcement cage penetrates through the post-cast strip area, and the second reinforcement cage penetrates below the post-cast strip area;
and pouring concrete between the reinforced concrete side beams to form the reinforced concrete support plate.
8. The construction method of the under-turned post-cast strip bracing-replacing structure as claimed in claim 7, wherein a third reinforcement cage is longitudinally arranged between a second reinforcement cage corresponding to the reinforced concrete edge beam region in the formwork and the first reinforcement cage corresponding thereto.
9. The construction method of the under-turned post-cast strip bracing-replacing structure as claimed in claim 7, wherein the construction of the structural floor slab and the formwork of the under-turned reinforced concrete side beam on both sides of the post-cast strip area is performed simultaneously or time-divisionally, so that the structural floor slab on one side of the post-cast strip area and the under-turned reinforced concrete structure thereof are formed simultaneously or time-divisionally.
10. A post-cast strip construction method is characterized in that the support replacing structure of the down-turned post-cast strip is formed by the construction method of the support replacing structure of the down-turned post-cast strip according to claim 7, and the post-cast strip structure is formed by pouring concrete into the first reinforcement cage penetrating through the area of the post-cast strip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010371707.9A CN111648411B (en) | 2020-05-06 | 2020-05-06 | Down-turned post-pouring belt support changing structure, construction method and post-pouring belt construction method |
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| CN202010371707.9A CN111648411B (en) | 2020-05-06 | 2020-05-06 | Down-turned post-pouring belt support changing structure, construction method and post-pouring belt construction method |
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| CN111648411B CN111648411B (en) | 2023-06-09 |
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|---|---|---|---|---|
| CN113931365A (en) * | 2021-10-19 | 2022-01-14 | 北京中建建筑设计院有限公司 | Post-cast strip-free floor system structure and construction method |
| CN115434330A (en) * | 2022-04-26 | 2022-12-06 | 上海宝冶集团有限公司 | Sectional type support replacing construction method |
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| CN111648411B (en) | 2023-06-09 |
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