CN111576658A - Construction method of post-cast strip protection wall of assembled basement outer wall - Google Patents
Construction method of post-cast strip protection wall of assembled basement outer wall Download PDFInfo
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- CN111576658A CN111576658A CN202010435954.0A CN202010435954A CN111576658A CN 111576658 A CN111576658 A CN 111576658A CN 202010435954 A CN202010435954 A CN 202010435954A CN 111576658 A CN111576658 A CN 111576658A
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
Abstract
The embodiment of the invention discloses a construction method of a protective wall of a post-cast strip of an outer wall of an assembled basement, which comprises prefabricating a protective wallboard; constructing a concrete wall; after the external wall template is dismantled, the manufactured protection wallboards are hoisted one by one, namely, the assembled protection wallboards are hoisted, then the position of the assembled protection wall is adjusted according to a drawing, and the assembled protection wall anchor bolts are installed and fixed after the adjustment is finished; sealing the gap of the assembled protection wall by using anchor bolt waterproof mortar, performing waterproof construction on the outer wall, performing waterproof protection layer construction, and finally backfilling the earthwork of the foundation pit. The construction method for the protective wall of the post-cast strip of the outer wall of the assembled basement accelerates the sealing speed of the post-cast strip of the outer wall of the basement, can integrally accelerate the backfill period of the foundation pit of the basement, shortens the exposure time of the foundation pit, ensures the safety of the foundation pit, and has obvious social and environmental benefits.
Description
Technical Field
The invention relates to the field of buildings, in particular to a construction method and a manufacturing process of a protective wall of an assembled basement outer wall post-cast strip.
Background
With the development of buildings, ultra-deep and ultra-large basements are more and more common, and due to factors such as uneven settlement and shrinkage of the structure, post-cast strips in the basements become an inevitable technical means. The post-cast strip can be sealed after the settlement post-cast strip needs to be capped by the structures on the two sides for 60 days, and the post-cast strip can be sealed after the telescopic post-cast strip needs to be constructed by the structures on the two sides for 60 days. Because the foundation pit engineering is not suitable for long-term exposure, the foundation pit needs to be refilled as soon as possible, and the safety of the foundation pit is ensured; secondly, the site progress and the safety civilized construction are required, the basement is not backfilled as early as possible, and the site road passing and the operation surface requirements are not facilitated; therefore, the prior general people usually adopt the method of building a masonry protection wall or leading an outer water stop wall to carry out outer ring sealing of a post-pouring belt, then carry out waterproof construction and carry out foundation pit earthwork backfilling.
According to the past experience, when the basement outer wall post-cast strip is sealed by adopting a masonry protection wall building method, due to the fact that the horizontal compression strength of the masonry protection wall is insufficient, the masonry wall is uneven in horizontal stress and easy to collapse in the earth backfilling process, water damage is caused, and the rework phenomenon is more; when the advanced water-stop reinforced concrete wall body is used for sealing the outer wall of the post-cast strip, the construction period is long, the inner template of the advanced water-stop concrete wall is in a double-layer steel bar net of the shear wall of the post-cast strip, and the inner template needs to be completely dismantled to cut off the steel bars of the shear wall in the post-cast strip, so that the strength of the shear wall is influenced. Thus, both methods have drawbacks.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a construction method and a manufacturing process of an assembled basement outer wall post-cast strip protection wall, aiming at the problems that the basement outer wall post-cast strip is sealed by a masonry protection wall method and the post-cast strip outer wall is sealed by an advanced water stop reinforced concrete wall body, which have disadvantages.
In order to solve the technical problem, the embodiment of the invention provides a construction method of a protective wall of an assembled basement outer wall post-cast strip, which comprises the following steps:
the method comprises the following steps: prefabricating a protective wallboard: manufacturing all protective wallboards according to the section size of the post-cast strip protective wall deepened by a drawing, and then maintaining the protective wallboards; step two: and (3) concrete wall construction: binding the shear wall reinforcing steel bars, then installing shear wall templates, pouring outer wall concrete, curing the outer wall concrete after pouring, and then removing the outer wall templates; step three: after the external wall template is dismantled, the manufactured protection wallboards are hoisted one by one, namely, the assembled protection wallboards are hoisted, then the position of the assembled protection wall is adjusted according to a drawing, and the assembled protection wall anchor bolts are installed and fixed after the adjustment is finished; step four: sealing the gap of the assembled protection wall by using anchor bolt waterproof mortar, performing waterproof construction on the outer wall, performing waterproof protection layer construction, and finally backfilling the earthwork of the foundation pit.
In the first step, after a design drawing of the basement is received, determining the section size of a post-cast strip protective wallboard according to the width of the post-cast strip, the elevation of a raft plate of the basement and the elevation of a top plate of a negative layer of the basement, wherein the width of the prefabricated post-cast strip protective wallboard is equal to the width of the post-cast strip plus 2 x 250mm, namely the lap joint length of the post-cast strip protective wallboard and a single-side shear wall; the height of a single post-cast strip protection wallboard is equal to the height difference between a basement raft and a basement roof minus one layer/an integer n, generally between 900mm and 1500mm, and the specific numerical value is determined according to the position of a tower crane and the hoisting weight; the thickness of the post-cast strip protective wall is generally 120 mm-150 mm; the number of the post-cast strip protection wall blocks is equal to the height difference between the basement raft and the basement roof minus one layer/the height of the single post-cast strip protection wall block.
In the first step, grooves are formed in the periphery of each manufactured protective wallboard, and after hoisting and fixing are completed, the grooves are sealed by waterproof mortar. The depth of the grooves of the upper opening and the lower opening is 20mm, and the width of the grooves of the upper opening and the lower opening is 20 mm; the depth of the grooves on the two sides is 40mm, and the width is 100 mm.
Wherein, in step one, reserve anchor bolt hole and rings when the wallboard is prefabricated, the anchor bolt hole is reserved and is established the method: a screw rod with the length of 200mm and the diameter of 16 mm is sleeved with double nuts in advance, and the height from the upper opening of each nut to the bottom surface of the screw rod is equal to the thickness of the assembled protection wallboard-the height of the double nuts; the method comprises the following steps that (1) a screw rod which is prepared in advance and is sleeved with double nuts is inserted to the bottom surface of concrete according to the anchor bolt hole position in a deepening drawing of an assembled protection wallboard before concrete is fully filled and is collected for the first time, the screw rod section faces downwards, and the nut section faces upwards; and after the strength of the concrete reaches 1.2mpa, slightly rotating the exposed part of the screw rod, taking out the pre-embedded screw rod and screw cap, and forming the anchor bolt hole.
And in the second step, welding the post-cast strip water stop steel plate before the shear wall template is installed.
And step two, binding the shear wall reinforcing steel bars: arranging a double-layer bidirectional phi 8@200 x 200 reinforcing steel mesh in the protective wallboard, backfilling a basement with the depth of more than 10m, and arranging phi 10/12@200 x 200 reinforcing steel mesh to enhance the transverse compressive strength of the assembled protective wallboard; the distance between the edge row of steel bars and the edge of the template is not more than 50mm, a bottom steel bar cushion block is arranged after the steel bars are bound, a stirrup is arranged between two layers of steel bar net sheets, the thickness of the upper layer steel bar protective layer and the lower layer steel bar protective layer is 15mm, and the steel bar net sheets are fully bound; after the steel bars are bound, a U-shaped round steel hanging ring with the diameter not less than phi 12 is arranged between the double-layer steel bar net pieces, the hanging ring steel bars are bent into the double-layer steel bar net pieces to be bound firmly, and the length of an exposed ring of the hanging ring is not less than 50mm, so that the hanging ring can be hung by penetrating a steel wire rope.
And in the second step, after the shear wall template is installed, according to an anchor bolt hole positioning diagram reserved on the assembled protection wall board, a vertical ink line is bounced at a position of 100mm of a post-cast strip edge on the template on the outer side of the shear wall, the transverse positioning of the anchor bolts is determined according to the principle that a first assembled protection wall board is arranged at a position 20mm higher than the foundation surface, after each anchor bolt is positioned, a woodworking electric drill with a drill bit with the same diameter as the drill bit of the reserved hole on the assembled protection wall board is used for punching at the positioning position, after punching is completed, an embedded anchor bolt is inserted into the hole, the depth of the embedded concrete outer wall is not less than 150mm, and the exposed length is not less than the thickness of the assembled protection wall board and 50 mm.
In the second step, outer wall concrete is poured, a hopper tower crane is adopted to transport the concrete to the assembled protection wallboard mold bound with the reinforcing steel bars for pouring, the concrete needs to be vibrated and compacted and the surface is roughened during pouring, and a single assembled protection wallboard needs to be poured at one time without repeated pouring; and when the secondary face is folded, folding the upper part of the protection wallboard into a four-face-slope shape according to the deepening requirement of the groove of the assembled protection wallboard, removing redundant concrete, covering by using a cotton felt after the secondary face folding is finished, and maintaining the wet maintenance, wherein the concrete strength of the assembled protection wallboard is not lower than C30.
In the third step, after the concrete strength of the protective wallboard meets the requirement, hoisting can be carried out; cleaning anchor bolt holes of the assembled protection wallboard before hoisting, adjusting the embedded anchor bolts, preparing nuts and gaskets matched with the embedded anchor bolts, and erecting an operation platform at a post-cast strip; and after the preparation work is finished, hoisting can be carried out, a tower crane steel wire rope is directly adopted to penetrate through the hoisting ring for hoisting, a commander commands the tower crane to be slowly close to the installation part, then the hole is matched by two persons to be aligned to the embedded anchor bolt of the shear wall, the gasket and the nut are installed and screwed, and the process is circulated until the hoisting installation is finished.
After the post-cast strip assembly type protection wall in the third step is hoisted and fixed, an angle grinder is adopted to cut off the anchor bolts higher than the outer plane of the protection wall plate, waterproof mortar is adopted to fill anchor bolt holes tightly, and the anchor bolts cannot be exposed; filling, compacting and trowelling gaps between the assembled protection wallboards to the upper opening of the groove by adopting waterproof mortar; the gap between the assembled protective wallboard and the shear wall is tightly filled with waterproof mortar, and a triangular area formed by the protective wallboard and the shear wall is smeared into an inclined plane by the waterproof mortar so as to facilitate subsequent waterproof construction.
The embodiment of the invention has the following beneficial effects: the sealing speed of the basement outer wall post-cast strip is increased, the backfill period of the basement foundation pit can be integrally increased, the exposure time of the foundation pit is shortened, the safety of the foundation pit is guaranteed, and social and environmental benefits are obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram schematically illustrating steps of a construction method for a protective wall of an assembled basement exterior wall post-cast strip.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic block diagram illustrating steps of a construction method of a post-cast strip protection wall for an exterior wall of an assembled basement according to the present invention. The construction method of the protective wall of the post-cast strip of the outer wall of the assembled basement comprises the following steps:
step one A1: prefabricating a protective wallboard: and deepening the section size of the post-cast strip protection wall according to a drawing, manufacturing all protection wallboards, and then maintaining the protection wallboards.
After receiving a design drawing of the basement, determining the section size of a post-cast strip protection wall plate according to the width of the post-cast strip, the elevation of a raft plate of the basement and the elevation of a top plate of a basement negative layer, wherein the width of the prefabricated post-cast strip protection wall plate is equal to the width of the post-cast strip plus 2 plus 250mm, namely the lap joint length of the post-cast strip protection wall plate and a single-side shear wall; the height of a single post-cast strip protection wallboard is equal to the height difference between a basement raft and a basement roof minus one layer/an integer n, generally between 900mm and 1500mm, and the specific numerical value is determined according to the position of a tower crane and the hoisting weight; the thickness of the post-cast strip protective wall is generally 120 mm-150 mm; the number of the post-cast strip protection wall blocks is equal to the height difference between the basement raft and the basement roof minus one layer/the height of the single post-cast strip protection wall block. And grooves are formed in the periphery of each manufactured protective wallboard, and after hoisting and fixing are finished, the grooves are sealed by waterproof mortar. The depth of the grooves of the upper opening and the lower opening is 20mm, and the width of the grooves of the upper opening and the lower opening is 20 mm; the depth of the grooves on the two sides is 40mm, and the width is 100 mm. Reserving an anchor bolt hole and a hanging ring when the protective wallboard is prefabricated, wherein the anchor bolt hole reserving method comprises the following steps: a screw rod with the length of 200mm and the diameter of 16 mm is sleeved with double nuts in advance, and the height from the upper opening of each nut to the bottom surface of the screw rod is equal to the thickness of the assembled protection wallboard-the height of the double nuts; the method comprises the following steps that (1) a screw rod which is prepared in advance and is sleeved with double nuts is inserted to the bottom surface of concrete according to the anchor bolt hole position in a deepening drawing of an assembled protection wallboard before concrete is fully filled and is collected for the first time, the screw rod section faces downwards, and the nut section faces upwards; and after the strength of the concrete reaches 1.2mpa, slightly rotating the exposed part of the screw, taking out the pre-embedded screw cap, forming the anchor bolt hole, and keeping the diameter of the inner hole of the reserved anchor bolt hole of the post-cast strip protection wall to be not less than phi 16.
Step two A2: and (3) concrete wall construction: binding the shear wall reinforcing steel bars, then installing a shear wall template, pouring external wall concrete, curing the external wall concrete after pouring, and then dismantling the external wall template.
And in the second step, welding the post-cast strip water stop steel plate before the shear wall template is installed. The method for binding the shear wall steel bars comprises the following steps: arranging a double-layer bidirectional phi 8@200 x 200 reinforcing steel mesh in the protective wallboard, backfilling a basement with the depth of more than 10m, and arranging phi 10/12@200 x 200 reinforcing steel mesh to enhance the transverse compressive strength of the assembled protective wallboard; the distance between the edge row of steel bars and the edge of the template is not more than 50mm, a bottom steel bar cushion block is arranged after the steel bars are bound, a stirrup is arranged between two layers of steel bar net sheets, the thickness of the upper layer steel bar protective layer and the lower layer steel bar protective layer is 15mm, and the steel bar net sheets are fully bound; after the steel bars are bound, a U-shaped round steel hanging ring with the diameter not less than phi 12 is arranged between the double-layer steel bar net pieces, the hanging ring steel bars are bent into the double-layer steel bar net pieces to be bound firmly, and the length of an exposed ring of the hanging ring is not less than 50mm, so that the hanging ring can be hung by penetrating a steel wire rope. After the shear wall formwork is installed, according to the anchor bolt hole positioning diagram reserved on the assembled protection wallboard, the vertical ink line is bounced at the position of 100mm of the rear pouring belt edge on the formwork outside the shear wall, the transverse positioning of the anchor bolt is determined according to the principle that the first assembled protection wallboard is arranged by 20mm higher than the foundation surface, after each anchor bolt is positioned, a woodworking electric drill with a drill bit with the same diameter as the drill bit of the reserved hole on the assembled protection wallboard is adopted to punch at the positioning position, after the punching is finished, an embedded anchor bolt is inserted into the hole, the depth of the embedded concrete outer wall is not less than 150mm, and the exposed length is not less than the thickness of the assembled protection wallboard and is 50 mm. Pouring outer wall concrete, namely, adopting a hopper tower crane to transfer the concrete into the assembled protection wallboard die bound with the reinforcing steel bars for pouring, wherein the concrete needs to be vibrated and compacted and the surface of the concrete is roughened during pouring, and the single assembled protection wallboard needs to be poured once and is not poured for multiple times; and when the secondary face is folded, folding the upper part of the protection wallboard into a four-face-slope shape according to the deepening requirement of the groove of the assembled protection wallboard, removing redundant concrete, covering by using a cotton felt after the secondary face folding is finished, and maintaining the wet maintenance, wherein the concrete strength of the assembled protection wallboard is not lower than C30.
Step three A3: after the external wall template is dismantled, the manufactured protection wallboards are hoisted one by one, namely, the assembled protection wallboards are hoisted, then the position of the assembled protection wall is adjusted according to a drawing, and the assembled protection wall anchor bolt is installed and fixed after the adjustment is finished.
In the third step, after the concrete strength of the protective wallboard meets the requirement, hoisting can be carried out; cleaning anchor bolt holes of the assembled protection wallboard before hoisting, adjusting the embedded anchor bolts, preparing nuts and gaskets matched with the embedded anchor bolts, and erecting an operation platform at a post-cast strip; and after the preparation work is finished, hoisting can be carried out, a tower crane steel wire rope is directly adopted to penetrate through the hoisting ring for hoisting, a commander commands the tower crane to be slowly close to the installation part, then the hole is matched by two persons to be aligned to the embedded anchor bolt of the shear wall, the gasket and the nut are installed and screwed, and the process is circulated until the hoisting installation is finished. After the post-cast strip assembled protection wall is hoisted and fixed, an angle grinder is adopted to cut off the anchor bolts higher than the outer plane of the protection wall plate, waterproof mortar is adopted to fill the anchor bolt holes tightly, and the anchor bolts cannot be exposed; filling, compacting and trowelling gaps between the assembled protection wallboards to the upper opening of the groove by adopting waterproof mortar; the gap between the assembled protective wallboard and the shear wall is tightly filled with waterproof mortar, and a triangular area formed by the protective wallboard and the shear wall is smeared into an inclined plane by the waterproof mortar so as to facilitate subsequent waterproof construction.
Step four A4: sealing the gap of the assembled protection wall by using anchor bolt waterproof mortar, performing waterproof construction on the outer wall, performing waterproof protection layer construction, and finally backfilling the earthwork of the foundation pit.
Compared with the traditional rear brickwork protection wall and a rear advanced water stop concrete wall, the construction method innovatively uses the assembled protection wall plate as the basement outer wall post-pouring zone protection wall, and can greatly reduce the construction difficulty because the assembled protection wall plate (or the outsourcing prefabricated protection wall plate) can be prefabricated in advance, the construction is centralized, the site arrangement is convenient, and the site safety civilized construction is facilitated; the section of the assembled basement post-cast strip protection wall is only about the traditional masonry protection wall and the advanced water-stop concrete protection wall 1/2, the construction is rapid, the operation is simple, and the construction cost of the assembled basement post-cast strip protection wall per meter can be saved by more than 40%.
The embodiment of the invention has the following beneficial effects: the sealing speed of the basement outer wall post-cast strip is increased, the backfill period of the basement foundation pit can be integrally increased, the exposure time of the foundation pit is shortened, the safety of the foundation pit is guaranteed, and social and environmental benefits are obvious.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A construction method of a protective wall of a post-cast strip of an outer wall of an assembled basement is characterized by comprising the following steps:
the method comprises the following steps: prefabricating a protective wallboard: manufacturing all protective wallboards according to the section size of the post-cast strip protective wall deepened by a drawing, and then maintaining the protective wallboards;
step two: and (3) concrete wall construction: binding the shear wall reinforcing steel bars, then installing shear wall templates, pouring outer wall concrete, curing the outer wall concrete after pouring, and then removing the outer wall templates;
step three: after the external wall template is dismantled, the manufactured protection wallboards are hoisted one by one, namely, the assembled protection wallboards are hoisted, then the position of the assembled protection wall is adjusted according to a drawing, and the assembled protection wall anchor bolts are installed and fixed after the adjustment is finished;
step four: sealing the gap of the assembled protection wall by using anchor bolt waterproof mortar, performing waterproof construction on the outer wall, performing waterproof protection layer construction, and finally backfilling the earthwork of the foundation pit.
2. The construction method for the protective wall of the assembled basement exterior wall post-cast strip according to claim 1, wherein in the first step, after a design drawing for basement design is received, the section size of the protective wall of the post-cast strip is determined according to the width of the post-cast strip, the elevation of the raft of the basement and the elevation of the top plate of the basement minus one layer, wherein the width of the protective wall of the pre-cast post-cast strip is +2 mm and 250mm, namely the lap joint length of the protective wall of the post-cast strip and the single-side shear wall; the height of a single post-cast strip protection wallboard is equal to the height difference between a basement raft and a basement roof minus one layer/an integer n, generally between 900mm and 1500mm, and the specific numerical value is determined according to the position of a tower crane and the hoisting weight; the thickness of the post-cast strip protective wall is generally 120 mm-150 mm; the number of the post-cast strip protection wall blocks is equal to the height difference between the basement raft and the basement roof minus one layer/the height of the single post-cast strip protection wall block.
3. The construction method for the protective wall of the post-cast strip of the outer wall of the assembled basement according to claim 1, wherein a groove is formed around each protective wall board manufactured in the first step, after hoisting and fixing are completed, the groove is sealed by waterproof mortar, and the depth of the groove at the upper opening and the groove at the lower opening is 20mm and the width of the groove is 20 mm; the depth of the grooves on the two sides is 40mm, and the width is 100 mm.
4. The construction method for the protective wall of the post-cast strip of the outer wall of the assembled basement as claimed in claim 1, wherein in the first step, an anchor hole and a hanging ring are reserved when the protective wall panel is prefabricated, and the method for reserving the anchor hole comprises the following steps: a screw rod with the length of 200mm and the diameter of 16 mm is sleeved with double nuts in advance, and the height from the upper opening of each nut to the bottom surface of the screw rod is equal to the thickness of the assembled protection wallboard-the height of the double nuts; the method comprises the following steps that (1) a screw rod which is prepared in advance and is sleeved with double nuts is inserted to the bottom surface of concrete according to the anchor bolt hole position in a deepening drawing of an assembled protection wallboard before concrete is fully filled and is collected for the first time, the screw rod section faces downwards, and the nut section faces upwards; and after the strength of the concrete reaches 1.2mpa, slightly rotating the exposed part of the screw rod, taking out the pre-embedded screw rod and screw cap, and forming the anchor bolt hole.
5. The construction method for the post-cast strip protection wall of the outer wall of the assembled basement according to claim 1, wherein in the second step, the post-cast strip water-stop steel plates are welded before the shear wall formwork is installed.
6. The construction method for the protective wall of the post-cast strip of the outer wall of the assembled basement as claimed in claim 1, wherein in the second step, the steel bars of the shear wall are bound: arranging a double-layer bidirectional phi 8@200 x 200 reinforcing steel mesh in the protective wallboard, backfilling a basement with the depth of more than 10m, and arranging phi 10/12@200 x 200 reinforcing steel mesh to enhance the transverse compressive strength of the assembled protective wallboard; the distance between the edge row of steel bars and the edge of the template is not more than 50mm, a bottom steel bar cushion block is arranged after the steel bars are bound, a stirrup is arranged between two layers of steel bar net sheets, the thickness of the upper layer steel bar protective layer and the lower layer steel bar protective layer is 15mm, and the steel bar net sheets are fully bound; after the steel bars are bound, a U-shaped round steel hanging ring with the diameter not less than phi 12 is arranged between the double-layer steel bar net pieces, the hanging ring steel bars are bent into the double-layer steel bar net pieces to be bound firmly, and the length of an exposed ring of the hanging ring is not less than 50mm, so that the hanging ring can be hung by penetrating a steel wire rope.
7. The construction method for the protective wall of the post-cast strip of the outer wall of the assembled basement as claimed in claim 1, wherein in the second step, after the shear wall formwork is installed, according to the anchor bolt hole positioning diagram reserved on the assembled protective wall board, a vertical ink line is bounced at a position of 100mm of the edge of the post-cast strip on the formwork on the outer side of the shear wall, the transverse positioning of the anchor bolts is determined according to the principle that the first assembled protective wall board is arranged after the anchor bolts are positioned 20mm higher than the foundation surface, after each anchor bolt is positioned, a woodwork electric drill with a drill bit having the same diameter as the diameter of the reserved hole on the assembled protective wall board is used for punching at the positioning position, after the punching is completed, the embedded anchor bolts are inserted into the holes, the depth of the embedded concrete outer wall is not less than 150mm, and the exposed length is not less than the.
8. The construction method for the post-cast strip protection wall of the outer wall of the assembled basement according to claim 1, wherein in the second step, the concrete is poured on the outer wall, a hopper tower crane is used for transferring the concrete into the assembled protection wall formwork with the bound steel bars, the concrete is compacted by vibration and roughened on the surface during pouring, and the single assembled protection wall formwork is poured in one step without pouring in multiple steps; and when the secondary face is folded, folding the upper part of the protection wallboard into a four-face-slope shape according to the deepening requirement of the groove of the assembled protection wallboard, removing redundant concrete, covering by using a cotton felt after the secondary face folding is finished, and maintaining the wet maintenance, wherein the concrete strength of the assembled protection wallboard is not lower than C30.
9. The construction method for the protective wall of the post-cast strip of the outer wall of the assembled basement as claimed in claim 1, wherein in the third step, the concrete of the protective wall can be hoisted after the concrete strength meets the requirement; cleaning anchor bolt holes of the assembled protection wallboard before hoisting, adjusting the embedded anchor bolts, preparing nuts and gaskets matched with the embedded anchor bolts, and erecting an operation platform at a post-cast strip; and after the preparation work is finished, hoisting can be carried out, a tower crane steel wire rope is directly adopted to penetrate through the hoisting ring for hoisting, a commander commands the tower crane to be slowly close to the installation part, then the hole is matched by two persons to be aligned to the embedded anchor bolt of the shear wall, the gasket and the nut are installed and screwed, and the process is circulated until the hoisting installation is finished.
10. The construction method of the post-cast strip protection wall for the outer wall of the assembled basement according to claim 1, wherein after the post-cast strip assembled protection wall in the third step is hoisted and fixed, an angle grinder is used for cutting off the anchor bolts higher than the outer plane of the protection wall board, waterproof mortar is used for filling the anchor bolt holes tightly, and the anchor bolts cannot be exposed; filling, compacting and trowelling gaps between the assembled protection wallboards to the upper opening of the groove by adopting waterproof mortar; the gap between the assembled protective wallboard and the shear wall is tightly filled with waterproof mortar, and a triangular area formed by the protective wallboard and the shear wall is smeared into an inclined plane by the waterproof mortar so as to facilitate subsequent waterproof construction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112112295A (en) * | 2020-09-08 | 2020-12-22 | 中建四局第五建筑工程有限公司 | Reinforcing construction method for post-cast strip of post-sealed outer wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201891133U (en) * | 2010-11-03 | 2011-07-06 | 中建三局第二建设工程有限责任公司 | Manual assembled type self-waterproof late poured band prefabricated slab of basement outer wall |
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| CN110439036A (en) * | 2019-07-19 | 2019-11-12 | 中国十七冶集团有限公司 | A kind of poured band of outer wall of basement advance water stop construction method |
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| CN201891133U (en) * | 2010-11-03 | 2011-07-06 | 中建三局第二建设工程有限责任公司 | Manual assembled type self-waterproof late poured band prefabricated slab of basement outer wall |
| CN104404985A (en) * | 2014-10-08 | 2015-03-11 | 中国十七冶集团有限公司 | Construction method for basement floor post-cast strip waterproofing structure |
| CN104631513A (en) * | 2014-12-26 | 2015-05-20 | 中誉远发国际建设集团有限公司 | Construction method for closing basement exterior wall post-cast strip |
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| CN110206070A (en) * | 2019-05-27 | 2019-09-06 | 中国十七冶集团有限公司 | A kind of basement wall post-cast strip protection wall construction method |
| CN110439036A (en) * | 2019-07-19 | 2019-11-12 | 中国十七冶集团有限公司 | A kind of poured band of outer wall of basement advance water stop construction method |
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| CN112112295A (en) * | 2020-09-08 | 2020-12-22 | 中建四局第五建筑工程有限公司 | Reinforcing construction method for post-cast strip of post-sealed outer wall |
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| CN111576658B (en) | 2021-08-31 |
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