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CN-121992886-A - Post-pouring belt structure and heat preservation integrated forming construction method

CN121992886ACN 121992886 ACN121992886 ACN 121992886ACN-121992886-A

Abstract

The invention discloses a post-pouring belt structure and heat preservation integrated forming construction method, which belongs to the technical field of construction engineering construction, and comprises the steps of firstly cleaning floating dust and sundries in a post-pouring belt groove and on the two sides of a post-pouring concrete joint surface, roughening the joint surface, and derusting exposed reinforcing steel bars in a region; binding a continuously-penetrated reinforcement cage in a post-pouring trough, installing a connecting piece on the heat-insulating composite plate, paving a metal net on the outer side of the heat-insulating composite plate, fixing the inner template and the heat-insulating composite plate by binding steel wires in a firm manner, oppositely pulling the inner template and the heat-insulating composite plate through a plurality of groups of split bolts to form a sealed pouring space, partially extending the connecting piece into the space, pouring concrete, vibrating and compacting, curing to the design strength, and removing the inner template and the split bolts after the strength of the concrete meets the requirement, so that holes left by the bolts are blocked. The invention can realize synchronous completion of post-pouring belt structure construction and heat preservation construction, and improves construction efficiency, building thermal performance and structural durability.

Inventors

  • JU LIWEI
  • XU JIAN
  • WU TONG
  • GUO WANGFEI
  • WANG DONGXING
  • Hao Shufei

Assignees

  • 北京天润建设有限公司
  • 中国二十二冶集团有限公司

Dates

Publication Date
20260508
Application Date
20260326

Claims (10)

  1. 1. The construction method for integrally forming the post-cast strip structure and the heat preservation is characterized by comprising the following steps of: S1, removing floating dust and sundries in a post-pouring belt groove and on the concrete joint surfaces of the two sides, roughening the concrete joint surfaces of the two sides, and derusting the exposed steel bar surfaces of the post-pouring belt area; s2, continuously penetrating and binding steel bars in the post-pouring belt groove to form a steel bar framework; S3, firstly installing a connecting piece (2) on the heat-insulating composite board (1), then paving a metal net (3) on the outer side of the heat-insulating composite board (1), and firmly fixing the metal net (3) and the connecting piece (2) by adopting binding steel wires; S4, oppositely pulling and fixing the inner template (5) and the heat-insulating composite board (1) through a plurality of groups of opposite-pulling bolts (4), so that a closed pouring space is formed between the inner template (5) and the heat-insulating composite board (1), and the connecting piece (2) locally stretches into the pouring space; s5, pouring concrete (6) into the pouring space, and curing the concrete (6) after compacting by vibrating until the design strength is reached; S6, after the strength of the concrete (6) reaches the standard, removing the inner template (5) and the split bolts (4), and plugging the left holes of the split bolts (4).
  2. 2. The post-cast strip structure and heat preservation integrated forming construction method according to claim 1, wherein in the step S2, after the reinforcement cage is bound, a cushion block is installed in the reinforcement cage, and the length of the cushion block is the same as the thickness of the reinforcement cage.
  3. 3. The post-cast strip structure and heat preservation integrated forming construction method according to claim 2, wherein the cushion blocks are arranged in a quincuncial shape, and the installation density is not less than 3-4 blocks/m < 2 >.
  4. 4. The post-cast strip structure and heat preservation integrated forming construction method according to claim 1, wherein in the step S2, after the reinforcement cage is bound, pre-embedded pipe fittings at corresponding design positions are laid, and the pre-embedded pipe fittings and the reinforcement cage are firmly bound and fixed by binding steel wires.
  5. 5. The post-cast strip structure and heat preservation integrated forming construction method according to claim 1, wherein in the step S3, the installation density of the connecting pieces (2) on the heat preservation composite board (1) is not less than 8 pieces/m 2.
  6. 6. The post-cast strip structure and heat preservation integrated molding construction method according to claim 1, characterized in that in step S3, before installing the connecting piece (2), the heat preservation composite board (1) is processed by adopting a modularized design and numbering according to the model and the position, and the heat preservation composite board (1) is prefabricated with installing holes, and the connecting piece (2) is installed on the heat preservation composite board (1) through the installing holes.
  7. 7. The post-cast strip structure and heat preservation integrated forming construction method according to claim 1, characterized in that in the step S3, the connecting piece (2) comprises a limiting head (21) and a connecting rod (22) which are connected, the limiting head (21) is pressed against the metal net (3), the connecting rod (22) penetrates through the metal net (3) and the heat preservation composite board (1), one end of the connecting rod (22) far away from the limiting head (21) is provided with a threaded part, and the threaded part stretches into the casting space in the step S4.
  8. 8. The post-pouring strip structure and heat preservation integrated forming construction method according to claim 1 is characterized in that in the step S4, the adopted split bolt (4) comprises a threaded rod (41), two limiting pieces (42) and two locking pieces (43), before the inner die plate (5) and the heat preservation composite plate (1) are fixed, a plurality of vertical battens (7) and a plurality of groups of transverse steel pipes (8) are symmetrically distributed on two opposite sides of the inner die plate (5) and the heat preservation composite plate (1), two transverse steel pipes (8) are arranged in each group, a plurality of split bolts (4) are arranged on the two groups of transverse steel pipes (8) in a symmetrical mode at intervals along the length direction, the threaded rod (41) penetrates through the two transverse steel pipes (8) on the same side and sequentially penetrates through the heat preservation composite plate (1) and the inner die plate (5), the threaded rod (41) is sleeved on the inner side and the outer side respectively, the two limiting pieces (43) are respectively screwed on two ends of the threaded rod (41) to fasten and fix the two transverse steel pipes (8), the vertical battens (7), the two transverse steel pipes (8) and the heat preservation composite plate (6) are required to be removed in the vertical battens (6).
  9. 9. The post-cast strip structure and heat preservation integrated forming construction method according to claim 1, wherein in the step S5, a layered continuous casting process is adopted, the single casting height is not more than 1000mm, the slump of the concrete (6) is controlled to be 180+/-20 mm, the casting of the upper concrete (6) is completed before the initial setting of the lower concrete (6), and the inter-layer intermittent time is not longer than the initial setting time of the concrete (6).
  10. 10. The post-cast strip structure and heat preservation integrated forming construction method according to any one of claims 1 to 9, characterized in that in step S3, the heat preservation composite board (1) is selected from a graphite polystyrene board, an extruded polystyrene board or a hard foam polyurethane board, and the metal mesh (3) is selected from a galvanized steel wire mesh or an electric welding mesh.

Description

Post-pouring belt structure and heat preservation integrated forming construction method Technical Field The invention relates to the technical field of building engineering construction, in particular to a post-pouring strip structure and heat preservation integrated forming construction method. Background The post-cast strip is used as a key reserved part for the expansion and the settlement of a building structure, and the heat preservation treatment effect directly influences the overall thermal performance and the structural durability of the building, so that the post-cast strip becomes a core control link for the heat preservation construction of the outer wall. The heat preservation treatment to building post-cast strip position adopts traditional post-construction technology generally in the industry at present, and the core way is to treat that main part structure post-cast strip concrete placement is accomplished, structural strength reaches the standard and after the maintenance is in place, the rethread pastes fixed mode and sets up the heated board at the outer wall. The method has the advantages of complex overall procedures, long construction period and extremely low construction efficiency, and the follow-up patched insulation board cannot be in seamless connection with the main body outer wall insulation layer, so that a thermal bridge phenomenon is extremely easy to form, and the overall energy-saving effect of the building is greatly reduced. Especially in the region with larger northern temperature difference, the deformation difference of the structure and the heat preservation is obvious, the heat preservation is extremely easy to crack and fall off, the quality problems such as wall leakage and the like can be caused, the fixing firmness of the heat preservation plate which is added and subsequently pasted is insufficient, the potential safety hazard is large, and the current high-standard and high-efficiency engineering construction requirements are difficult to meet. Therefore, it is highly desirable to provide a post-cast strip structure and insulation integrated molding construction method to solve the above problems. Disclosure of Invention The invention aims to provide a post-pouring belt structure and heat preservation integrated forming construction method, which can overcome the defects of complicated working procedures, easiness in forming a thermal bridge, easiness in cracking and falling off of a heat preservation layer and insufficient safety of the traditional post-heat preservation construction, realize synchronous completion of post-pouring belt structure construction and heat preservation construction, and improve construction efficiency, building thermal performance and structural durability. The technical scheme adopted by the invention is as follows: a post-pouring belt structure and heat preservation integrated forming construction method comprises the following steps: S1, removing floating dust and sundries in a post-pouring belt groove and on the concrete joint surfaces of the two sides, roughening the concrete joint surfaces of the two sides, and derusting the exposed steel bar surfaces of the post-pouring belt area; s2, continuously penetrating and binding steel bars in the post-pouring belt groove to form a steel bar framework; S3, installing a connecting piece on the heat-insulating composite board, paving a metal net on the outer side of the heat-insulating composite board, and firmly fixing the metal net and the connecting piece by adopting binding steel wires; S4, oppositely pulling and fixing the inner template and the heat-insulating composite board through a plurality of groups of opposite-pull bolts, so that a closed pouring space is formed between the inner template and the heat-insulating composite board, and the connecting piece locally stretches into the pouring space; S5, pouring concrete into the pouring space, and curing the concrete after compacting by vibrating until the design strength is reached; And S6, after the strength of the concrete reaches the standard, removing the inner template and the split bolts, and plugging the split bolt left holes. Further, in step S2, after the reinforcement cage is bound, a spacer is installed in the reinforcement cage, and the length of the spacer is the same as the thickness of the reinforcement cage. Furthermore, the cushion blocks are arranged in a quincuncial shape, and the installation density is not less than 3-4 blocks/m < 2 >. Further, in step S2, after the binding of the reinforcement cage is completed, laying the embedded pipe fitting corresponding to the designed position, and firmly binding and fixing the embedded pipe fitting and the reinforcement cage by adopting binding steel wires. Further, in step S3, the installation density of the connecting pieces on the heat-insulating composite board is not less than 8 pieces/m 2. Further, in step S3, before the connecting piece is installed, the he