CN115387393A - Post-cast strip pre-sealing quick construction method - Google Patents
Post-cast strip pre-sealing quick construction method Download PDFInfo
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- CN115387393A CN115387393A CN202211070857.1A CN202211070857A CN115387393A CN 115387393 A CN115387393 A CN 115387393A CN 202211070857 A CN202211070857 A CN 202211070857A CN 115387393 A CN115387393 A CN 115387393A
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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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Abstract
The invention discloses a post-cast strip pre-sealing quick construction method. Including basement outer wall post-cast strip and basement roof post-cast strip, construction method includes: manufacturing an embedded steel plate, binding reinforcing steel bars of a basement outer wall body, fixing the embedded steel plate, pouring the basement outer wall, performing waterproof construction and backfilling; the method comprises the following steps of erecting a top plate template, binding top plate steel bars, pouring concrete on the top plate, installing a prefabricated cement plate at a post-cast strip, performing waterproof construction on the top plate, backfilling the top plate, erecting a closed template at the post-cast strip on the inner side surface of the wall body of the outer wall of the basement after the construction of the main body structure is completed, and simultaneously pouring concrete on the outer wall and the post-cast strip of the top plate to complete the construction of the post-cast strip. The construction method provided by the invention can effectively ensure the waterproof quality, avoid construction waste caused by repair and chiseling in the later period and reduce the dust discharge amount. Meanwhile, the post-cast strip is closed in advance, field planting greening is arranged, the construction progress is accelerated, labor consumption is saved, engineering cost is reduced, and the effect of green construction of a construction field is achieved.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a rapid construction method of a basement post-cast strip.
Background
Along with the increase of land resource cost and the gradual progress of building construction technology in the current society, more and more buildings with high-rise, large size and complex shapes are provided, and post-cast belts with corresponding different functions are required to be arranged for solving the problems of poor settlement of a main building and a skirt house, concrete shrinkage cracking due to condensation, concrete pulling cracking due to temperature change and the like. In the past design method, the basement outer wall post-cast strip is plugged by adopting a prefabricated sealing plate after a template is dismantled. However, the following problems are common in the practice: (1) the process is multiple, and the precast concrete slab relates to multiple processes such as reinforcing steel bars, templates, concrete, transportation, installation, joint filling treatment and the like, and is too complicated; (2) the above processes all need special construction, and the labor cost is high; (3) the work and material investment is large, and the economy is not enough; (4) the prefabricated sealing plate needs to occupy a certain construction field, and has certain influence on the normal production of small projects in the construction field; (5) the tower crane needs to be occupied for a long time during installation, so that normal construction is influenced; (6) the waterproof construction quality is easily affected; (7) the installation is inconvenient, and the construction speed is slow.
In recent years, most high-rise building engineering needs to be inserted into indoor decoration, outdoor pipe networks, municipal works, roads, greening engineering and the like in advance in the construction of brand house-enterprise high turnover mode engineering, but the site cannot be closed timely, the basement decoration and electromechanical installation are affected by water leakage of a post-cast strip, and the outdoor engineering can hardly be constructed, so that the construction of reasonably arranging the post-cast strip is the key of engineering control.
Disclosure of Invention
The invention provides a post-cast strip pre-sealing quick construction method, aiming at the defects that the procedures are more, the work and material investment is larger, the construction is inconvenient, the waterproof quality cannot be guaranteed and the like in the construction process of a basement post-cast strip sealing plate.
The technical scheme adopted by the invention is as follows: the post-cast strip pre-sealing quick construction method comprises a post-cast strip of a basement outer wall, and comprises the following steps:
1.1 ) manufacturing of an embedded steel plate: designing and processing the pre-buried steel plate according to the width of the post-cast strip of the basement exterior wall and the height of the wall body designed by engineering; the width of the embedded steel plate is larger than that of the post-cast strip, the height of the embedded steel plate is equal to that of the wall, and two sides of the embedded steel plate are welded with one anchoring steel bar at intervals of 200-300mm from top to bottom;
1.2 Reinforcement of basement exterior wall: binding wall reinforcing steel bars according to the requirements of a design drawing, and fixing an additional reinforcing steel bar on the reinforcing steel bars on the two sides of the designed post-cast strip position in a position corresponding to the anchoring reinforcing steel bars on the pre-buried steel plate;
1.3 Fixing of pre-buried steel plates: hoisting the processed embedded steel plate to a post-cast strip by using a tower crane, adjusting the elevation and the position of the embedded steel plate, and fixing the embedded steel plate and the wall steel bars by welding anchoring steel bars and additional steel bars after the position is adjusted;
1.4 ) pouring the outer wall of the basement: firstly, erecting a wall template on one side of a post-cast strip, pouring concrete, and dismantling the wall template after the strength of the concrete reaches a form removal condition; then erecting a wall template on the other side of the post-cast strip, pouring concrete, and removing the wall template after the strength of the concrete reaches a form removal condition to complete the construction of the basement outer wall;
1.5 Water-proof construction: when waterproof construction conditions are met on site, performing waterproof layer construction and waterproof protection layer construction on the outer side surface of the basement outer wall body and the outer side surface of the embedded steel plate;
1.6 Backfill soil): after the waterproof construction is finished, the soil is qualified through inspection and acceptance, and backfilling engineering is carried out;
1.7 After backfilling is finished, a closed template is erected at a rear pouring zone of the inner side surface of the basement outer wall body, the top end of the closed template is lower than the top end of the basement outer wall body, and a concrete pouring opening is formed between the top end of the closed template and the top end of the basement outer wall body; and after the construction of the main building is finished, pouring concrete into the post-pouring belt through the concrete pouring port, and finishing the construction of the post-pouring belt.
Further, in the post-cast strip pre-sealing quick construction method, the thickness of the embedded steel plate is 3-5mm.
Further, in the post-cast strip pre-closing rapid construction method, in the step 1.1), the width of the embedded steel plate is greater than that of the post-cast strip, and the two sides of the embedded steel plate are respectively widened by 100-150mm from the post-cast strip.
Further, in the post-cast strip pre-sealing quick construction method, the anchoring steel bars are steel bars with the diameter of 11-13mm, and the additional steel bars are steel bars with the diameter of 13-15 mm.
Further, in the post-cast strip pre-sealing quick construction method, in step 1.7), concrete is poured into the post-cast strip through a concrete pouring port, wherein the concrete is self-compacting micro-expansive concrete.
Further, the post-cast strip pre-sealing quick construction method comprises a basement top plate settlement post-cast strip, and the basement top plate settlement post-cast strip pre-sealing quick construction method comprises the following steps:
2.1 Preparation of prefabricated cover plates: the prefabricated cover plate comprises a flat prefabricated cover plate and a prefabricated cover plate with a round hole; adopting a batten frame mould, blanking reinforcing steel bars according to the size of the batten frame mould, binding the reinforcing steel bars, fixing two lifting hooks on the reinforcing steel bars after the binding of the reinforcing steel bars is finished, pouring concrete into the batten frame mould, and performing film covering maintenance after the pouring is finished to prepare a flat prefabricated cover plate; taking a plurality of flat prefabricated cover plates, and manufacturing a pouring hole penetrating through concrete in the middle of each flat prefabricated cover plate to obtain a prefabricated cover plate with a round hole;
2.2 Adjustment and cleaning in the post-settling casting zone: after the top plate of the basement is constructed, cleaning the surface of the hardened concrete construction joint in the post-settlement casting zone, and adjusting and cleaning the reinforcing steel bars in the post-settlement casting zone;
2.3 A closed template is supported at the post-cast strip by a formwork support device on the lower end surface of the top plate of the basement;
2.4 Prefabricated decking is installed on site: hoisting a flat plate prefabricated cover plate and a prefabricated cover plate with round holes to the specified position of the post-sedimentation pouring belt through a tower crane, manually placing the flat plate prefabricated cover plate and the prefabricated cover plate with round holes, placing the prefabricated cover plates in the sequence of placing the prefabricated cover plates from one side to the other side of the post-sedimentation pouring belt in sequence, placing the prefabricated cover plates with the round holes every 3-4 meters, and placing the prefabricated cover plates with the round holes at the two end parts and the turning parts of the post-sedimentation pouring belt; sealing the joints between the adjacent prefabricated cover plates and between the prefabricated cover plates and the top plate of the basement;
2.5 Cast iron pipe installation: placing a cast iron pipe on a pouring hole on the prefabricated cover plate with the round hole; the height of the cast iron pipe is higher than the thickness of backfill soil, and the joint of the cast iron pipe and the prefabricated cover plate with the round hole is compacted by cement mortar; temporarily sealing an opening at the upper end of the cast iron pipe;
2.6 Water-proof and protective layer construction: waterproof layer construction and waterproof protection layer construction are carried out on the basement top plate, the prefabricated cover plate and the cast iron pipe, and finally a waterproof additional layer is carried out on the prefabricated cover plate for one time;
2.7 Backfill construction: backfilling the basement roof, backfilling the soil in a manual soil shoveling mode within 1m around the cast iron pipe, and manually ramming the soil layer by layer;
2.8 Concrete pouring of the settled post-cast strip: and (3) pouring the settled post-cast strip 14 days after the main building is capped, pouring concrete to the post-cast strip through the opening of the cast iron pipe, pouring the concrete in each cast iron pipe until the concrete has the same elevation as the backfill soil, cutting the upper part of each cast iron pipe after the concrete reaches the strength, and performing upper part plugging waterproof treatment on the cast iron pipes by adopting SBS coiled materials.
Further, in the post-cast strip pre-sealing quick construction method, in the step 2.3), the overlapping width of the sealing template and the concrete on the two sides of the post-cast strip is not less than 100mm.
Further, in the post-cast strip pre-sealing quick construction method, in the step 2.5), the height of the cast iron pipe is 200-300mm higher than the thickness of the backfill soil.
Further, in the post-cast strip pre-sealing quick construction method, in the step 2.6), a waterproof additional layer is finally formed on the prefabricated cover plate, and the width of the waterproof additional layer is 300-400mm wider than that of the prefabricated cover plate.
Further, in the post-cast strip pre-sealing quick construction method, in the step 2.8), concrete is poured to the post-cast strip through the opening of the cast iron pipe, and the concrete is self-compacting micro-expansive concrete.
The invention has the beneficial effects that:
1. the post-cast strip pre-sealing quick construction method provided by the invention has the advantages of less working procedures, less material investment and labor saving.
2. The post-cast strip pre-sealing quick construction method provided by the invention avoids the influence on water resistance caused by seams between sealing plates and between the sealing plates and a structural wallboard, and ensures the water resistance construction quality.
3. The post-cast strip pre-sealing quick construction method provided by the invention does not occupy a field, is high in installation speed and basically does not occupy a tower crane.
4. The post-cast strip pre-sealing quick construction method provided by the invention has the advantages of simple construction conditions and process and easiness in operation.
5. According to the post-cast strip pre-sealing quick construction method provided by the invention, sealing can be performed by one working procedure of one team after machine maintenance, and organization coordination management is facilitated.
6. According to the post-cast strip pre-sealing quick construction method provided by the invention, concrete at the post-cast strip of the outer wall does not need chiseling and finishing, the discharge amount of construction waste and dust is reduced, noise pollution caused by chiseling of concrete is reduced, and environmental protection is facilitated.
7. The post-cast strip pre-sealing quick construction method provided by the invention can reduce the construction safety risk.
8. The invention provides a post-cast strip pre-sealing quick construction method, aiming at a post-cast strip of an outer wall of a basement, a prefabricated steel plate is adopted to replace a concrete prefabricated sealing plate, the length of a steel plate required by each section of the post-cast strip is calculated through CAD software, the post-cast strip is embedded in a concrete wallboard after being processed, namely, during construction of a main structure of the basement, an embedded steel plate is adopted at the outer side of the post-cast strip of the outer wall, the embedded steel plate is 100mm wider than each side of the post-cast strip, additional steel bars are bound on main steel bars of the wall, the embedded steel plate is fixed on the wallboard through the additional steel bars, and after the concrete pouring of the outer wall is completed and a template is removed, the waterproof and backfilling construction of the outer wall can be carried out.
9. The post-cast strip pre-sealing quick construction method provided by the invention not only effectively ensures the waterproof quality, but also avoids construction waste caused by repair and chiseling in the later period, reduces the discharge amount of dust, and plays a positive and beneficial role in environmental protection. Meanwhile, the post-cast strip is closed in advance, field planting and greening are arranged, the construction progress is accelerated, labor consumption is saved, the engineering cost is reduced, and the effect of green construction of a construction field is achieved.
10. The post-cast strip pre-sealing quick construction method provided by the invention has the characteristics of high construction speed, construction site saving, direct construction of a waterproof layer without treatment of a base layer, good forming effect and the like, does not influence the settlement of a main body structure, can solve the problems of basement leakage prevention and normal insertion of outdoor engineering, can ensure the synchronization of basement decoration and a main body and the synchronization of outdoor engineering, external wall and decoration, and ensures the engineering quality while ensuring the engineering progress.
Drawings
Fig. 1 is a front view of a pre-buried steel plate.
Fig. 2 is a schematic side view of the combination of the embedded steel plates and the wall steel bars.
Fig. 3 is a schematic construction view of a post-cast strip of an outer wall of a basement.
Fig. 4 is an enlarged view of a portion B in fig. 3.
Fig. 5 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A in fig. 3.
Fig. 6 is a schematic structural view of the batten frame mold.
Fig. 7 is a schematic diagram of reinforcement binding in the process of processing the prefabricated cover plate.
Fig. 8 is a schematic diagram of a flat prefabricated cover plate structure.
Fig. 9 is a schematic diagram of a prefabricated cover plate structure with a circular hole.
Fig. 10 is a schematic view of the construction of the settlement post-cast strip of the top plate of the basement.
Detailed Description
Embodiment post-cast strip pre-sealing quick construction method
The post-cast strip comprises a basement outer wall post-cast strip (100) and a basement top plate settlement post-cast strip (200), and the post-cast strip pre-sealing quick construction method comprises the following steps:
1. as shown in fig. 1-5, the pre-sealing quick construction method for the post-cast strip (100) of the basement exterior wall comprises the following steps:
1.1 Design and fabrication of pre-buried steel plates:
and designing and processing the pre-buried steel plate according to the width of the post-cast strip of the outer wall of the basement and the height of the wall body designed by engineering. The width of the pre-buried steel plate is larger than the width of the post-cast strip, the height of the pre-buried steel plate is equal to the height of the outer wall body of the basement, and two sides of the pre-buried steel plate are welded with an anchoring steel bar at intervals of 200mm from top to bottom.
Preferably, the thickness of the embedded steel plate is 3-5mm.
Preferably, the width of the embedded steel plate is larger than that of the post-cast strip, and the two sides of the embedded steel plate are respectively widened by 100-150mm to form the post-cast strip.
Preferably, the anchoring steel bar is a steel bar with the diameter of 11-13 mm.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
the width of the post-cast strip (100) of the outer wall of the engineering design basement is 800mm. The pre-buried steel plate (1) is a steel plate with the thickness of 3 mm. The width of the embedded steel plate (1) is 100mm on both sides compared with the post-cast strip, namely the total width of the embedded steel plate (1) is 1000mm, and the height of the embedded steel plate is the same as the height of the wall body of the basement outer wall. And two sides of the embedded steel plate (1) are welded with 100mm long phi 12mm anchoring steel bars (2) at intervals of 200mm from top to bottom. The embedded steel plate (1) can be a whole steel plate or a whole steel plate assembled together.
1.2 Reinforcement of basement exterior wall:
binding the wall reinforcing steel bars (3) of the outer wall of the basement according to the requirements of design drawings, and fixing an additional reinforcing steel bar (4) at the positions, corresponding to the anchoring reinforcing steel bars (2) on the pre-buried steel plate (1), on the wall reinforcing steel bars (3) at the two sides of the designed post-cast strip position respectively.
Preferably, the additional steel bars are steel bars with the diameter of 13-15 mm.
In this embodiment, as an exemplary embodiment, the additional rebar is a 14mm rebar.
1.3 Fixing of pre-buried steel plates:
and hoisting the processed embedded steel plate to a post-cast strip by adopting a tower crane, adjusting the elevation and the position of the embedded steel plate, and fixing the embedded steel plate and the wall steel bars by welding the anchoring steel bars and the additional steel bars after the position is adjusted.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
1.3.1 Hoisting the embedded steel plates: and hoisting the processed embedded steel plate (1) to a post-cast strip (100) by adopting a tower crane.
1.3.2 Temporarily fixing the embedded steel plates: and temporarily fixing the embedded steel plates on the wall reinforcing steel bars by adopting iron wires.
1.3.3 Adjust in place): and adjusting the elevation and the position of the embedded steel plate, and paying attention to the thickness of the wall steel bar protection layer.
1.3.4 Fixing the embedded steel plate: after the position is adjusted, the embedded steel plates are welded on the additional steel bars (4) through the anchoring steel bars (2), and are fixed on the wall steel bars, after the embedded steel plates are fixed and constructed, full-time quality inspectors check and accept the embedded steel plates, and next procedure construction can be carried out after the experience folding grids.
1.4 ) pouring the outer wall of the basement:
erecting a wall formwork on wall reinforcing steel bars on one side of a post-cast strip, pouring concrete, and removing the wall formwork after the strength of the concrete reaches a formwork removal condition; and then erecting a wall body template on the wall body reinforcing steel bar on the other side of the post-cast strip, pouring concrete, and removing the wall body template after the concrete strength reaches a form removal condition to complete the construction of the basement outer wall.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
1.4.1 Erecting wall formworks: firstly, erecting a wall formwork on the wall reinforcing steel bars on one side of the post-cast strip, and paying attention to check whether the size and the position of the formwork meet the requirements.
1.4.2 Concrete pouring: and (5) pouring concrete.
1.4.3 Demolishing the wall form: and after the concrete pouring is finished, the template can be dismantled after the strength of the concrete reaches the template dismantling condition.
1.4.4 Adopting the same construction method, erecting a wall formwork on the wall reinforcing steel bars on the other side of the post-cast strip, pouring concrete, and dismantling the wall formwork after the concrete strength reaches the formwork erecting and dismantling condition to complete the construction of the basement outer wall integral wall (5).
1.5 Water-proof construction:
when the waterproof construction condition is met on site, waterproof construction can be carried out, the post-cast strip does not need to be treated, the embedded steel plate is level to the wall surface, and the waterproof construction quality are greatly benefited. And constructing a waterproof layer (6) and a waterproof protective layer (7) on the outer side surface of the basement outer wall body and the outer side surface of the embedded steel plate.
1.6 Backfill soil):
and after the waterproof construction is finished, the backfilled soil (300) project can be carried out after the acceptance is qualified.
1.7 Post-cast strip casting:
after backfilling is finished, a closed template (8) is erected at the rear pouring zone of the inner side surface of the basement outer wall body, the top end of the closed template (8) is lower than the top end of the basement outer wall body (5), and a concrete pouring opening (9) is formed between the top end of the closed template and the top end of the basement outer wall body; and after the construction of the main building is finished, pouring self-compacting micro-expansion concrete to the post-pouring belt through the concrete pouring port, and finishing the construction of the post-pouring belt.
2. As shown in fig. 6-10, the pre-closed rapid construction method of the basement roof settlement post-cast strip (200) comprises the following steps:
2.1 Preparation of prefabricated cover plates:
the prefabricated cover plate comprises a flat prefabricated cover plate and a prefabricated cover plate with a round hole; adopting a batten frame mold, blanking reinforcing steel bars according to the size of the batten frame mold, binding the reinforcing steel bars, fixing two lifting hooks on the reinforcing steel bars after the binding of the reinforcing steel bars is finished, pouring concrete into the batten frame mold, and performing film covering maintenance after the pouring is finished to prepare a flat prefabricated cover plate; and taking a plurality of flat prefabricated cover plates, and making a pouring hole which is communicated with concrete in the middle of each flat prefabricated cover plate to obtain the prefabricated cover plate with the round hole.
In this embodiment, as an exemplary embodiment, the following embodiments are specifically described:
2.1.1 Manufacturing a prefabricated cover plate mold: the mold is made into a frame mold (10) by adopting a batten, and the total width of the mold is 400mm wider than the width of the post-pouring belt. The height of the die is 150mm. The die can be used in a turnover mode after being manufactured, and the finished product of the die needs to be protected in the using process.
2.1.2 Reinforcement of prefabricated cover plates: the reinforcing steel bar worker carries out the reinforcing steel bar unloading according to the mould size, adopts phi 16 mm's reinforcing steel bar (11), and the double-deck two-way is moved about freely and quickly to arrange to carry out the ligature of reinforcing steel bar. After the steel bars are bound, the two lifting hooks (12) are fixed on the steel bars, so that the subsequent lifting is facilitated.
2.1.3 Concrete placement of prefabricated decking
After the steel bars are bound, concrete is poured into the batten frame die, the concrete is poured by adopting excess materials when the main body structure is poured, materials are saved, film covering maintenance is timely carried out after pouring is finished, and the maintenance time is not less than 7 days.
Firstly, a flat prefabricated cover plate (13) is manufactured. Then, a round pouring hole (14) which is 300mm in diameter and penetrates through the concrete is formed in the middle of the plurality of flat plate prefabricated cover plates, a prefabricated cover plate (15) with a round hole is formed, and when the pouring hole which penetrates through the concrete is formed, the steel bar (11) at the lower end is not damaged.
2.2 Adjustment and cleaning in the post-settling casting zone:
and after the top plate of the basement is constructed, cleaning the surface of the hardened concrete construction joint in the post-settlement casting zone, and adjusting and cleaning the reinforcing steel bars in the post-settlement casting zone.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
2.2.1 After the construction of the basement roof (19) is finished, the surface of the hardened concrete construction joint in the post-settlement casting belt (200) is subjected to scabbling treatment, loose stones are removed, and a high-pressure water gun is used for flushing the concrete construction joint so as to expose hard cement and stones.
2.2.2 Main steel bars (23) in the post-cast strip (200) are adjusted according to the intervals of the steel bars in the construction drawing, a specially-assigned person is arranged to restore the steel bars, and the steel bars which are not bound are fully bound. And arranging a specially-assigned person to clean the steel bars in the post-cast strip due to oil stains, floating rust and the like.
2.3 The closed template is supported at the post-cast strip by a formwork support device on the lower end surface of the top plate of the basement.
Preferably, the overlapping width of the concrete on the two sides of the closing template and the post-cast strip is not less than 100mm.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
the closed formwork (18) and the formwork support device (17) are checked, the formwork support device (17) adopts an independent support system, the distance between large cross rods is 1.2-1.8m, the distance between vertical rods is 0.9m, and the formwork support device has the advantages of stability, sufficient rigidity and strength. The lap joint of the closed template (18) and the surface of the poured concrete is not less than 100mm, the joint must be tight, the flatness of the bottom of the plate is not more than 2mm, and the height difference between the bottom of the plate and the surface of the poured concrete is not more than 2mm. The formwork support device and the closed formwork should have sufficient strength, rigidity and stability. The closed form should be tight and not leak slurry, and it should be ensured that the new and old concrete after the concrete construction has no obvious connection and rubbing. Cleaning up the sundries and the like in the post-cast strip.
2.4 Prefabricated decking is installed on site:
hoisting a flat plate prefabricated cover plate and a prefabricated cover plate with round holes to the specified position of the post-sedimentation pouring belt through a tower crane, manually placing the flat plate prefabricated cover plate and the prefabricated cover plate with round holes, placing the prefabricated cover plates in the sequence of placing the prefabricated cover plates from one side to the other side of the post-sedimentation pouring belt in sequence, placing the prefabricated cover plates with the round holes every 3-4 meters, and placing the prefabricated cover plates with the round holes at the two end parts and the turning parts of the post-sedimentation pouring belt; and sealing the joints between the adjacent prefabricated cover plates and between the prefabricated cover plates and the top plate of the basement.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
2.4.1 Before placing the prefabricated cover plate, the steel bars and the closed formwork in the post-pouring belt should be checked and accepted by a supervision unit.
2.4.2 The prefabricated cover plates are hung to the designated positions of the post-cast strip through a tower crane and are manually placed, the flat prefabricated cover plates and the prefabricated cover plates with the round holes are placed in sequence from one side of the post-cast strip to the other side of the post-cast strip, one prefabricated cover plate with the round holes with the diameter phi of 300mm is placed on each prefabricated cover plate every 3m, and one prefabricated cover plate with the round holes is placed at the end part and the corner of the post-cast strip, so that the self-compacting concrete is prevented from increasing at the corner due to resistance, and the self-compacting concrete is difficult to continuously flow forwards. .
2.4.3 The gaps between the adjacent prefabricated cover plates and the gaps at the joints of the prefabricated cover plates and the top plate of the basement are sealed and compacted by cement mortar.
2.5 Installation of cast iron pipes:
placing a cast iron pipe on a pouring hole on the prefabricated cover plate with the round hole; the height of the cast iron pipe is higher than the thickness of backfill soil, and the joint of the cast iron pipe and the prefabricated cover plate with the round hole is compacted by cement mortar; and temporarily sealing the upper end opening of the cast iron pipe.
Preferably, the height of the cast iron pipe is 200-300mm higher than the thickness of the backfill soil.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
2.5.1 DN300 cast iron pipe (16) is placed on the pouring hole (14) of the prefabricated cover plate (15) with the round hole (the height of the cast iron pipe is 200mm higher than the thickness of the backfill soil), the cast iron pipe (16) is inserted into the prefabricated cover plate, the periphery of the cast iron pipe is compacted by cement mortar, the cast iron pipe is ensured to be firmly installed, the cast iron pipe is used as a pouring hole of later concrete, the pouring of the concrete in the later pouring zone is convenient, and when the cast iron pipe is installed, the lower end of the cast iron pipe needs to be prevented from extending into the later pouring zone. The cast iron pipe is inserted into the prefabricated cover plate to a depth of 100mm.
2.5.2 After the cast iron pipe is installed, temporary sealing treatment is carried out by using an adhesive tape, so that sundries are prevented from entering the rear pouring belt and being incapable of being cleaned before concrete of the rear pouring belt is poured.
2.6 Water-proof and protective layer construction:
waterproof layer construction and waterproof protection layer construction are carried out on the basement top plate, the prefabricated cover plate and the cast iron pipe, and finally a waterproof additional layer is carried out on the prefabricated cover plate for one time; and finally, a waterproof additional layer is made on the prefabricated cover plate, and the width of the waterproof additional layer is 300-400mm wider than that of the prefabricated cover plate.
In this embodiment, as an exemplary embodiment, specifically, the following are implemented:
the construction of a leveling layer is carried out before waterproof construction, the waterproof construction can be carried out in place at one time, the construction is carried out when the cast iron pipe is subjected to the waterproof method according to the pipe root node, the waterproof height of the cast iron pipe is 2m, the construction of a waterproof protective layer (21) is carried out after the waterproof layer (20) is constructed, the finished product protection of the cast iron pipe needs to be paid attention to during the construction, finally, a waterproof additional layer (22) is carried out on the prefabricated cover plate at the post-cast strip, and each layer is 300mm wider than the prefabricated cover plate.
2.7 Backfill construction:
and (3) backfilling the top plate of the basement (300), backfilling the soil in a manual soil shoveling mode within 1m of the periphery of the cast iron pipe, and manually tamping the soil layer by layer.
In this embodiment, as an exemplary embodiment, the following embodiments are specifically described:
within 1m around the cast iron pipe (16), a bulldozer and a scraper are not required to fill soil, and a road roller is not required to compact the soil; it can only be backfilled by manual shoveling and tamped by manual layers. So as to prevent the prefabricated reinforced concrete from being extruded to cause the damage of the waterproof layer.
2.8 Concrete pouring of the settled post-cast strip:
and (3) after the settled post-cast strip reaches the top sealing of the main body for 14 days, pouring the settled post-cast strip, pouring self-compacting micro-expansion concrete, more preferably self-compacting micro-expansion and anti-permeability concrete into the post-cast strip through the opening of the cast iron pipe, pouring the concrete in each cast iron pipe until the elevation of the concrete is consistent with that of the backfill soil, cutting the upper part of the cast iron pipe after the concrete reaches the strength, and performing upper part plugging waterproof treatment on the cast iron pipe by adopting SBS coiled materials.
2.9 ) landscaping construction
In the landscape construction process, the cast iron pipe is prevented from being directly rolled by a vehicle. The cast iron pipe is marked correspondingly.
Claims (10)
1. The post-cast strip pre-sealing quick construction method is characterized by comprising a post-cast strip of a basement outer wall, and the post-cast strip pre-sealing quick construction method of the basement outer wall comprises the following steps:
1.1 ) manufacturing of an embedded steel plate: designing and processing the pre-buried steel plate according to the width of the post-cast strip of the outer wall of the basement and the height of the wall body designed by engineering; the width of the embedded steel plate is larger than that of the post-cast strip, the height of the embedded steel plate is equal to that of the wall, and two sides of the embedded steel plate are welded with one anchoring steel bar at intervals of 200-300mm from top to bottom;
1.2 Reinforcement of basement exterior wall: binding wall reinforcing steel bars according to the requirements of a design drawing, and fixing an additional reinforcing steel bar on the reinforcing steel bars on the two sides of the designed post-cast strip position in a position corresponding to the anchoring reinforcing steel bars on the pre-buried steel plate;
1.3 Fixing of pre-buried steel plates: hoisting the processed embedded steel plate to a post-pouring belt by adopting a tower crane, adjusting the elevation and the position of the embedded steel plate, and fixing the embedded steel plate and the wall body steel bars by welding anchoring steel bars and additional steel bars after the position is adjusted;
1.4 ) pouring the outer wall of the basement: firstly, erecting a wall template on one side of a post-cast strip, pouring concrete, and dismantling the wall template after the strength of the concrete reaches a form removal condition; then erecting a wall template on the other side of the post-cast strip, pouring concrete, and removing the wall template after the strength of the concrete reaches a form removal condition to complete the construction of the basement outer wall;
1.5 Water-proof construction: when the waterproof construction conditions are met on site, performing waterproof layer construction and waterproof protective layer construction on the outer side surface of the basement outer wall body and the outer side surface of the embedded steel plate;
1.6 Backfill soil): after the waterproof construction is finished, the soil is qualified through inspection and acceptance, and backfilling engineering is carried out;
1.7 After backfilling is finished, a closed template is erected at a rear pouring zone of the inner side surface of the basement outer wall body, the top end of the closed template is lower than the top end of the basement outer wall body, and a concrete pouring opening is formed between the top end of the closed template and the top end of the basement outer wall body; and after the construction of the main building is finished, pouring concrete into the post-pouring belt through the concrete pouring port, and finishing the construction of the post-pouring belt.
2. The post-cast strip pre-sealing quick construction method according to claim 1, wherein the thickness of the embedded steel plate is 3-5mm.
3. The post-cast strip pre-closing rapid construction method as claimed in claim 1, wherein in the step 1.1), the width of the embedded steel plate is greater than that of the post-cast strip, and the two sides of the embedded steel plate are respectively wider than the post-cast strip by 100-150mm.
4. The post-cast strip pre-closing rapid construction method as claimed in claim 1, wherein the anchoring reinforcement is a reinforcement of phi 11-13mm, and the additional reinforcement is a reinforcement of phi 13-15 mm.
5. The post-cast strip pre-closing rapid construction method according to claim 1, wherein in the step 1.7), concrete is poured into the post-cast strip through a concrete pouring opening, and the concrete is self-compacting micro-expansive concrete.
6. The post-cast strip pre-sealing quick construction method according to claim 1, 2, 3, 4 or 5, which is characterized by comprising a basement roof settlement post-cast strip, and the basement roof settlement post-cast strip pre-sealing quick construction method comprises the following steps:
2.1 Preparation of prefabricated cover plates: the prefabricated cover plate comprises a flat prefabricated cover plate and a prefabricated cover plate with a round hole; adopting a batten frame mould, blanking reinforcing steel bars according to the size of the batten frame mould, binding the reinforcing steel bars, fixing two lifting hooks on the reinforcing steel bars after the binding of the reinforcing steel bars is finished, pouring concrete into the batten frame mould, and performing film covering maintenance after the pouring is finished to prepare a flat prefabricated cover plate; taking a plurality of flat prefabricated cover plates, and manufacturing a pouring hole penetrating through concrete in the middle of each flat prefabricated cover plate to obtain a prefabricated cover plate with a round hole;
2.2 Adjustment and cleaning in the post-settling casting zone: after the top plate of the basement is constructed, cleaning the surface of the hardened concrete construction joint in the post-settlement casting zone, and adjusting and cleaning the reinforcing steel bars in the post-settlement casting zone;
2.3 A closed template is supported at the post-cast strip by a formwork support device on the lower end surface of the top plate of the basement;
2.4 Prefabricated decking is installed on site: hoisting a flat plate prefabricated cover plate and a prefabricated cover plate with round holes to the specified position of the post-sedimentation pouring belt through a tower crane, manually placing the flat plate prefabricated cover plate and the prefabricated cover plate with round holes, placing the prefabricated cover plates in the sequence of placing the prefabricated cover plates from one side to the other side of the post-sedimentation pouring belt in sequence, placing the prefabricated cover plates with the round holes every 3-4 meters, and placing the prefabricated cover plates with the round holes at the two end parts and the turning parts of the post-sedimentation pouring belt; sealing the joints between the adjacent prefabricated cover plates and between the prefabricated cover plates and the top plate of the basement;
2.5 Installation of cast iron pipes: placing a cast iron pipe on a pouring hole on the prefabricated cover plate with the round hole; the height of the cast iron pipe is higher than the thickness of the backfill soil, and the joint of the cast iron pipe and the prefabricated cover plate with the round hole is compacted by cement mortar; temporarily sealing an opening at the upper end of the cast iron pipe;
2.6 Water-proof and protective layer construction: waterproof layer construction and waterproof protection layer construction are carried out on the basement top plate, the prefabricated cover plate and the cast iron pipe, and finally a waterproof additional layer is carried out on the prefabricated cover plate for one time;
2.7 Backfill construction: backfilling the basement roof, backfilling the soil in a manual soil shoveling mode within 1m around the cast iron pipe, and manually ramming the soil layer by layer;
2.8 Concrete pouring of the settled post-cast strip: and (3) pouring the settled post-cast strip 14 days after the main building is capped, pouring concrete to the post-cast strip through the cast iron pipe opening, pouring the concrete in each cast iron pipe until the concrete is consistent with the elevation of backfill soil, cutting off the upper part of each cast iron pipe after the concrete reaches the strength, and performing upper part plugging waterproof treatment on the cast iron pipes by adopting SBS coiled materials.
7. The post-cast strip pre-sealing quick construction method as claimed in claim 6, wherein in the step 2.3), the overlapping width of the sealing template and the concrete on both sides of the post-cast strip is not less than 100mm.
8. The post-cast strip pre-sealing quick construction method as claimed in claim 6, wherein in the step 2.5), the height of the cast iron pipe is 200-300mm higher than the thickness of the backfill soil.
9. The post-cast strip pre-closing quick construction method according to claim 6, characterized in that in step 2.6), a waterproof additional layer is finally formed on the prefabricated cover plate, and the width of the waterproof additional layer is 300-400mm wider than that of the prefabricated cover plate.
10. The post-cast strip pre-closing rapid construction method as claimed in claim 6, wherein in the step 2.8), concrete is poured into the post-cast strip through the cast iron pipe opening, and the concrete is self-compacting micro-expansive concrete.
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