CN115126003A - Post-cast strip pre-sealing structure and pre-sealing construction method - Google Patents

Post-cast strip pre-sealing structure and pre-sealing construction method Download PDF

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Publication number
CN115126003A
CN115126003A CN202210754586.5A CN202210754586A CN115126003A CN 115126003 A CN115126003 A CN 115126003A CN 202210754586 A CN202210754586 A CN 202210754586A CN 115126003 A CN115126003 A CN 115126003A
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CN
China
Prior art keywords
post
cast strip
steel plate
grouting
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210754586.5A
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Chinese (zh)
Inventor
陈云瑞
李帅
李海通
张志高
李培彦
程远兵
杨中正
魏国力
巴图
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North China University of Water Resources and Electric Power
China Construction Fifth Engineering Bureau Co Ltd
Original Assignee
North China University of Water Resources and Electric Power
China Construction Fifth Engineering Bureau Co Ltd
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Application filed by North China University of Water Resources and Electric Power, China Construction Fifth Engineering Bureau Co Ltd filed Critical North China University of Water Resources and Electric Power
Priority to CN202210754586.5A priority Critical patent/CN115126003A/en
Publication of CN115126003A publication Critical patent/CN115126003A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/16Arrangement or construction of joints in foundation structures
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66Sealings
    • E04B1/68Sealings of joints, e.g. expansion joints
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66Sealings
    • E04B1/68Sealings of joints, e.g. expansion joints
    • E04B1/6801Fillings therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04Devices for both conveying and distributing

Abstract

The invention discloses a post-cast strip pre-sealing structure and a pre-sealing construction method, and aims to solve the technical problems of complicated process and poor waterproof effect of the existing post-cast strip pre-sealing technology. The post-cast strip pre-sealing structure comprises a splayed steel plate, a grouting pipe, a partition net, a bottom die and an exhaust pipe; the post-cast strip pre-sealing construction method comprises the steps of (1) erecting a bottom die, penetrating an exhaust pipe through the bottom die, and arranging a partition net; (2) laying a non-cured asphalt layer and a rubber belt; (3) welding a plurality of splayed steel plates (4), fixing the steel plates, coating a sealant, arranging a cement mortar protective layer, and laying a waterproof coiled material (5); (6) arranging a protection platform; (7) and after the building structure is settled to meet the requirements, sealing the post-cast strip by grouting through a grouting pipe. The invention has the advantages of simple use, convenient operation, good waterproof effect and compact grouting.

Description

Post-cast strip pre-sealing structure and pre-sealing construction method
Technical Field
The invention relates to the technical field of post-cast strip pre-sealing construction, in particular to a post-cast strip pre-sealing structure and a pre-sealing construction method.
Background
The post-cast strip is a concrete strip reserved at the corresponding position of a foundation slab, a wall and a beam according to the design or construction specification requirement for preventing harmful cracks possibly generated by uneven self shrinkage or uneven settlement of a reinforced concrete structure in the building construction.
In actual engineering construction, on one hand, in order to construct outdoor pipe networks, outdoor backfill, outdoor landscapes and the like as soon as possible so as to shorten or chase a delayed construction period, a post-cast strip needs to be closed in advance; on the other hand, the existence of the post-cast strip can also generate a lot of adverse effects on the construction, for example, beam slab members on two sides of the post-cast strip are in an overhanging state and need to be provided with supports for a long time; the steel bars in the post-cast strip are exposed for a long time and are easy to corrode. In order to solve the contradictions and problems, shorten the construction period, save the construction investment and create good conditions for construction, the post-cast strip needs to be closed in advance, and after the settlement of the building meets the corresponding requirements, the post-cast strip is poured by grouting. Among them, the prior art often adopts precast concrete apron to carry out the pre-sealing to post-cast strip support.
The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The inventor discovers that when the technical scheme that the existing precast concrete cover plate pre-seals the post-cast strip is realized: this technical scheme needs the different arrangement of reinforcement schemes of post-cast strip width and its upper portion earthing thickness design, and the operation is complicated, and the preparation is loaded down with trivial details, and water-proof effects can't obtain guaranteeing.
In view of at least one of the above technical problems, the present disclosure provides a post-cast strip pre-sealing structure, which includes a splayed steel plate with a through hole at the center, a grouting pipe corresponding to the central through hole of the splayed steel plate, a partition net vertically disposed between two pre-sealed side substrates, a bottom mold disposed between two pre-sealed side substrates, and an exhaust pipe penetrating through the bottom mold.
In some embodiments of the present disclosure, fixing eaves for fixing bolts are disposed on two sides of the splayed steel plate.
In some embodiments of the present disclosure, a square-column-shaped or cylindrical protection platform is disposed at a connection portion of the steel plate and the grouting pipe.
In some embodiments of the present disclosure, the protection platform is made of concrete.
In some embodiments of the present disclosure, the partition net is a double-layer steel wire net.
In some embodiments of the present disclosure, one end of the exhaust pipe extends 50-70mm from the bottom die, and the other end of the exhaust pipe is a tip with a pointed end abutting against the steel plate or a three-way pipe abutting against the steel plate.
According to one aspect of the disclosure, a post-cast strip pre-closing construction method based on the post-cast strip pre-closing structure is provided, and includes the following steps:
(1) a bottom die is arranged between the pre-closed matrixes, an exhaust pipe penetrates through the bottom die, and a partition net is arranged on the matrixes vertical to the two sides of the pre-closed matrixes;
(2) paving a non-cured asphalt layer in the contact range of the splayed steel plate and the pre-closed matrix, and paving a rubber belt above the non-cured asphalt layer;
(3) fully welding the splicing seams among the splayed steel plates, and polishing and flattening;
(4) penetrating a fixing eave of the splayed steel plate by using a bolt, fixing the steel plate on the pre-closed base body, coating a sealant at the joint of the steel plate and the pre-closed base body, arranging a cement mortar protective layer, and adjusting the exhaust pipe to enable the tip of the exhaust pipe to abut against the surface of the steel plate;
(5) paving waterproof coiled materials within the range of the splayed steel plate, and extending and paving the waterproof coiled materials to two sides to a certain extent;
(6) pouring a protective table at the position of the connecting part of the steel plate and the grouting pipe;
(7) and after the building structure is settled to meet the requirements, sealing the post-cast strip by grouting through a grouting pipe.
In some embodiments of the present disclosure, in the step (1), the partition net is welded to a reinforcing bar reserved in the pre-closed matrix.
In some embodiments of the present disclosure, in the step (5), the waterproof roll is laid up a distance along the grouting pipe.
In some embodiments of the present disclosure, in the step (7), a certain amount of water is injected for wetting before the grouting.
One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:
1. due to the fact that the steel plate is adopted for pre-sealing, the complex material preparation steps when the precast concrete cover plate is pre-sealed are effectively solved, and convenience of the pre-sealing device is further achieved.
2. Because the steel plate in the shape of the Chinese character 'ba' is adopted, the grouting surface is higher than the surfaces of the pre-closed two side substrates, the dense reliability of pouring is ensured, and the post-cast strip part formed by pouring is also in the shape of the Chinese character 'ba', so that the water accumulation of the post-cast strip part can be effectively prevented, and the leakage risk is greatly reduced.
3. Because the rubber belt is laid under the steel plate, the connecting part is in flexible connection and has certain flexibility, the pulling crack of the waterproof coiled material caused by the uneven settlement of the post-cast strip part can be effectively reduced, the influence of the settlement of the building on the waterproof effect is further avoided, and the waterproof layer can also play a role.
Drawings
Fig. 1 is a schematic view illustrating a post-cast strip pre-sealing structure in an embodiment of the present application.
Fig. 2 is a schematic diagram of a splayed steel plate structure in an embodiment of the present application.
FIG. 3 is a schematic view of a splayed steel plate structure according to another embodiment of the present application.
Fig. 4 is a schematic view illustrating a connection structure of a splayed steel plate and a grouting pipe according to an embodiment of the present application.
FIG. 5 is a schematic view of an exhaust pipe according to an embodiment of the present application.
FIG. 6 is a schematic view of an exhaust pipe according to another embodiment of the present application.
Fig. 7 is a partially enlarged view of a in fig. 1.
FIG. 8 is a schematic top view of an embodiment of the post-cast strip pre-close structure installation.
In the above figures, 1 is a substrate on two sides of a post-cast strip, 2 is a splayed steel plate, 3 is a grouting pipe, 4 is a protection platform, 5 is an expansion bolt, 6 is a separation net, 7 is an exhaust pipe, 8 is a bottom die, 9 is a waterproof coiled material, 10 is a non-cured asphalt layer, 11 is a rubber belt, and 12 is a cement mortar layer.
Detailed Description
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified.
The members, materials and the like in the following examples are all conventional commercially available products unless otherwise specified.
For better understanding of the technical solutions of the present application, the technical solutions will be described in detail below with reference to the drawings and specific embodiments.
The embodiment discloses a post-cast strip pre-sealing structure, which comprises a splayed steel plate with a through hole in the center, a grouting pipe arranged corresponding to the central through hole of the splayed steel plate, a partition net vertically arranged between two pre-sealed side base bodies, a bottom die arranged between the two pre-sealed side base bodies, and an exhaust pipe penetrating through the bottom die, and is shown in figure 1.
The splayed steel plate is mainly used for sealing the upper part of a post-cast strip, and is characterized in that the upper surface is a plane, two sides of the splayed steel plate are bent to form a slope, the slope-shaped bottom edge is provided with an edge brim for fixing, and the center of the upper surface is provided with a through hole for connecting a grouting pipe. The size of the splayed steel plate is selected according to the width of a post-cast strip in actual engineering. In this embodiment, the width of the post-cast strip is 800mm, and considering that the fixed eaves at the two ends need to fall on the pre-sealed substrate and a certain redundancy is left, the width of the splayed steel plate is 1200mm, the length of the splayed steel plate is 2000mm, and the thickness of the splayed steel plate is 8 mm. In other embodiments, referring to fig. 3, the fixing eaves are L-shaped.
The grouting pipe is used for grouting the grout after the building settlement meets the requirements. The length of the grouting pipe is determined according to the thickness of the designed filling, see fig. 4, and is arranged perpendicular to the steel plate in the shape of a Chinese character ba. The thickness of the designed filling soil is 1700mm in the implementation, so the height of the grouting pipe is 1700mm, certain hardness is considered, the grouting pipe is a DN150 cast iron pipe with the wall thickness of 5mm, and in other embodiments, a steel pipe is selected as the grouting pipe.
Separate the net mainly used and control the flow direction of concrete thick liquid when pouring the post-cast strip, after concrete thick liquid meets separating the net, because the separation effect of separating the net, the concrete thick liquid can flow in the opposite direction, guarantees the closely knit degree of separating the interior concrete thick liquid of net inter-block zone section from this. The partition net in this embodiment selects double-deck wire net, sets up one every 6 meters in the post-cast strip, in some other embodiments, can select corresponding suitable interval distance according to the mobility of concrete.
The bottom die has the function of sealing and supporting the bottom of the post-pouring strip. The bottom mould is supported and arranged through the supporting columns, so that the bottom space of the post-cast strip is sealed, concrete grouting in the post-cast strip is facilitated, the width of the bottom mould exceeds the width of the post-cast strip, the bottom mould is tightly fixed with a building matrix, and the grout is prevented from leaking during post-cast strip grouting. In this embodiment, a wood board bottom mold is selected, and in other embodiments, a steel board bottom mold is selected.
The exhaust pipe is used for discharging air in the post-cast strip when grouting, prevents that the concrete is inside to produce the cavity, influences the pouring quality in post-cast strip, simultaneously, is used for judging whether two closing means junction concrete grouting is closely knit in advance, also serves as excessive thick liquid pipe. The diameter of the exhaust pipe made of PVC material is 25 mm. The length of the exhaust pipe needs to be determined according to the thickness of the post-cast strip, one end of the exhaust pipe is guaranteed to abut against the inner wall of the splayed steel plate of the pre-closing device, the other end of the exhaust pipe exceeds the bottom die of the post-cast strip by 50-70mm, and in addition, referring to fig. 5, the end, abutting against the inner wall of the splayed steel plate, of the exhaust pipe is cut into a sharp-mouth shape, the steel plate is prevented from closing an exhaust pipe opening, and then the effects of exhausting and judging the grouting degree cannot be achieved. When the slurry is injected, the slurry is gradually accumulated at the bottom of the post-pouring belt, the air in the post-pouring belt is extruded to the upper part of the closed space of the post-pouring belt, enters the exhaust pipe through the exhaust pipe sharp nozzle abutting against the steel plate, and is discharged from the exhaust pipe opening at the lower part of the bottom die. When the post-cast strip is filled with the slurry, the redundant slurry can flow out of the exhaust pipe and can be used as a slurry overflow pipe, so that the pre-sealing device is prevented from being damaged by the pressure of the slurry, and the pre-sealing device is used for judging whether the grouting stops or not. In other embodiments, referring to fig. 6, the head of the vent pipe located within the post-cast strip is a tee against the steel plate.
The embodiment also discloses a post-cast strip pre-sealing construction method based on the post-cast strip pre-sealing structure, which comprises the following steps:
(1) and a bottom die is supported between the pre-closed substrates, an exhaust pipe penetrates through the bottom die, and a separation net is arranged on the substrates vertical to the two sides of the pre-closed substrates.
Firstly, a bottom die is arranged on a bottom support between pre-closed matrixes so as to be used for pouring and forming a post-pouring belt, an exhaust pipe is arranged at the corresponding position of the bottom die at intervals of the length of the splayed steel plate of the used post-pouring belt pre-closed structure after the bottom die is erected, and a sharp mouth of the exhaust pipe is positioned at the connecting part of the two splayed steel plates, namely the central part of the two adjacent grouting pipes and is abutted against the surfaces of the steel plates, so that whether concrete slurry between the two grouting pipes is poured compactly or not is conveniently judged.
The partition net is arranged perpendicular to the base bodies on two sides of the post-cast strip, the partition net in the embodiment adopts a double-layer steel wire mesh, and is welded with reserved steel bars exposed from two side faces of the post-cast strip to realize the arrangement of the partition net, wherein the partition net is arranged in the post-cast strip at intervals of 6m and needs to be properly adjusted according to the actual position to ensure that the partition net is not positioned near the grouting pipe, so that the grouting is prevented from being influenced. Through the setting that separates the net, can effective control later stage subside the flow direction of the slip casting concrete thick liquid after up to standard, when the concrete thick liquid flows to cutting off net department, because the hindrance of wire net leads to the thick liquid backward flow, guarantees from this and cuts off the interior thick liquid measure of net interval zone section, and then has ensured the slip casting fullness degree of thick liquid in this zone section.
(2) And paving a non-cured asphalt layer in the contact range of the splayed steel plate and the pre-closed matrix, and paving a rubber belt above the non-cured asphalt layer.
Cleaning the surfaces of the substrates at the two sides of the post-cast strip, which are close to the post-cast strip, and coating a non-cured asphalt waterproof layer, wherein the non-cured rubber asphalt waterproof coating is a waterproof coating capable of always keeping a sticky paste in the service life of the waterproof coating, can seal cracks and capillary holes of a base layer, has strong self-healing capability, is sticky when touched and is difficult to peel off, and can solve the problems of cracking, flexural fatigue, advanced aging and the like of the waterproof layer in a high stress state caused by the transmission of cracking stress of the base layer to the waterproof layer; meanwhile, due to the viscosity of the creep material, the capillary holes and cracks of the base layer can be well sealed, the problem of water channeling of the waterproof layer is solved, and the waterproof reliability is greatly improved. In view of various advantages of the non-cured asphalt waterproof layer, on one hand, the non-cured asphalt waterproof layer can play a role in bonding a rubber belt in a subsequent process, and on the other hand, the non-cured asphalt waterproof layer is used for waterproofing of joints and improving influence of post-cast strip settlement on the sealing and compacting degree of the post-cast strip through the anti-fatigue recovery capacity of the non-cured asphalt waterproof layer. In this example, a non-cured asphalt layer having a width of 100mm and a thickness of 2mm was applied.
After the non-cured asphalt layer is paved, the rubber belt with the thickness of 10mm and the width same as that of the non-cured asphalt layer is paved by using the viscosity of the non-cured asphalt layer, the problem of sealing the post-cast belt caused by uneven settlement of the post-cast belt is relieved by mainly using the elasticity of the rubber belt, the settlement within a certain range is ensured, and the sealing and good waterproof effects of the post-cast belt can be still kept through the elastic deformation digestion of the rubber belt.
(3) And welding the splicing seams among the splayed steel plates fully, and polishing the splicing seams to be smooth.
Before the splayed steel plate is installed, firstly, welding a gap between splayed steel plates to ensure that the steel plates are tightly connected and a post-cast strip formed by subsequent casting can be connected into a whole; in addition, in order to facilitate the paving of the subsequent waterproof coiled material and the flatness of the post-cast strip after pouring, the flatness of the seam is required to be ensured, and therefore, after the seam of the splayed steel plate is welded, the seam is required to be polished to be flat.
(4) Referring to fig. 7, bolts penetrate through the fixing eaves of the splayed steel plate to fix the steel plate on the pre-closed base body, sealant is coated at the joint of the steel plate and the pre-closed base body, a cement mortar protective layer is arranged, and the tip of the exhaust pipe is adjusted to abut against the surface of the steel plate.
Referring to fig. 8, the welded splayed steel plate fixing eaves are arranged on the laid rubber belt, in order to ensure the fixing firmness, expansion bolts are adopted to sequentially penetrate through the steel plate, the rubber belt and the non-cured asphalt layer and are fixed on the base bodies on the two sides of the post-cast belt, and the maximum distance between the expansion bolts on the same side is not more than 1 meter.
Waterproof sealant is coated at the joint welding position between the steel plate and the pre-sealed base body and between the splayed steel plates, so that rainwater is prevented from penetrating into a post-pouring strip through the joint position, and the waterproofness is further ensured. In addition, because the water seepage risk of handing-over position department between splayed steel sheet and post-cast strip both sides base member is very big, so because of the consideration of water-proof effects, lay by laying bricks or stones cement mortar protective layer in handing-over position department of the two. In this example, the protective layer of cement mortar is 300mm wide.
After the splayed steel plate is fixed, the exhaust pipe penetrating through the bottom die is further adjusted, so that a sharp-mouth tip of the exhaust pipe is abutted to the surface of the steel plate.
(5) Waterproof coiled materials are paved in the range of the splayed steel plates, and the waterproof coiled materials are paved by extending to two sides to a certain extent.
In order to further guarantee the water seepage prevention effect of the post-cast strip, the waterproof coiled material is paved within the range of the splayed steel plate, wherein the waterproof coiled material is paved by 1000mm towards the outer sides of the edges of the two sides of the splayed steel plate in an expanding mode, and is paved by 200mm upwards along the grouting pipe, so that the waterproof effect is effectively improved. And after the laying is finished, carrying out a water closing test to verify the waterproof effect of the waterproof roll.
(6) And a protective table at the connecting part of the pouring steel plate and the grouting pipe.
In order to better protect the connecting part of the grouting pipe and the splayed steel plate, a protection platform is poured at the connecting part. In this embodiment, a square concrete protection platform with a width of 500mm and a thickness of 200mm is poured, and in other embodiments, a cylindrical protection platform with a diameter of 500mm and a thickness of 200mm is poured.
(7) And after the settlement of the building structure meets the requirements, sealing the post-cast strip through grouting of the grouting pipe.
After the post-cast strip pre-sealing structure is installed, earth can be backfilled, and subsequent engineering construction is carried out, wherein the pipe orifice of the grouting pipe needs to be plugged, so that sundries and water bodies are prevented from entering in the subsequent construction, and the pouring of the post-cast strip is prevented from being influenced. When the building settlement meets the corresponding standard, concrete grout with the corresponding specification can be injected through the grouting pipe, a certain amount of water needs to be injected through the grouting opening before the building settlement is poured, so that the inner wall of the grouting pipe, the base bodies on two sides of the post-cast strip and the bottom mould are wetted, the injected concrete grout is prevented from influencing the fluidity due to water loss, and the grouting pipe and the post-cast strip are further blocked.
In other embodiments, the pre-sealing construction sequence is adjusted correspondingly, and after the splayed steel plate is fixed and is waterproof, the partition net, the bottom die and the exhaust pipe are arranged.
While certain preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, the present invention is intended to include such modifications and variations, provided they come within the scope of the appended claims and their equivalents.

Claims (10)

1. The utility model provides a post-cast strip is enclosed structure in advance which characterized in that, including the center be equipped with the splayed steel sheet of through-hole, with splayed steel sheet center through-hole corresponds the slip casting pipe that sets up, is used for setting up the wall net between the both sides base member of pre-closure perpendicularly, sets up die block, the wearing to locate between the both sides base member of pre-closure the blast pipe of die block.
2. The post-cast strip pre-closing structure according to claim 1, wherein fixing eaves for bolt fixing are arranged on two sides of the splayed steel plate.
3. The post-cast strip pre-closing structure according to claim 1, wherein a square column-shaped or cylindrical protection platform is arranged at a connecting part of the steel plate and the grouting pipe.
4. The post-cast strip pre-sealing structure as claimed in claim 1, wherein the protection platform is made of concrete.
5. The post-cast strip pre-sealing structure according to claim 1, wherein the partition net is a double-layer steel wire mesh.
6. The post-cast strip pre-sealing structure as claimed in claim 1, wherein one end of the exhaust pipe extends 50-70mm from the bottom die, and the other end is a tip with a tip abutting against the steel plate or a three-way pipe abutting against the steel plate.
7. A post-cast strip pre-closing construction method is implemented based on the post-cast strip pre-closing structure of claim 1, and comprises the following steps:
(1) a bottom die is supported between the pre-closed matrixes, an exhaust pipe penetrates through the bottom die, and a partition net is arranged on the matrixes vertical to the two sides of the pre-closed matrixes;
(2) paving a non-cured asphalt layer in the contact range of the splayed steel plate and the pre-closed matrix, and paving a rubber belt above the non-cured asphalt layer;
(3) fully welding the splicing seams among the splayed steel plates, and polishing and flattening;
(4) penetrating a fixing eave of the splayed steel plate by using a bolt, fixing the steel plate on the pre-closed base body, coating a sealant at the joint of the steel plate and the pre-closed base body, arranging a cement mortar protective layer, and adjusting the exhaust pipe to enable the tip of the exhaust pipe to abut against the surface of the steel plate;
(5) laying waterproof coiled materials in the range of the splayed steel plate, and extending and laying the waterproof coiled materials to two sides to a certain extent;
(6) pouring a protective table at the position of the connecting part of the steel plate and the grouting pipe;
(7) and after the settlement of the building structure meets the requirements, sealing the post-cast strip through grouting of the grouting pipe.
8. The post-cast strip pre-closure construction method according to claim 7, wherein in the step (1), the partition net is welded to a reinforcement bar reserved in a pre-closure matrix.
9. The post-cast strip pre-closing construction method as claimed in claim 7, wherein in the step (5), the waterproof roll is laid up a certain distance along the grout pipe.
10. The post-cast strip pre-closing construction method as claimed in claim 7, wherein a certain amount of water is injected for wetting before grouting in the step (7).
CN202210754586.5A 2022-06-29 2022-06-29 Post-cast strip pre-sealing structure and pre-sealing construction method Pending CN115126003A (en)

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CN105121746A (en) * 2013-04-09 2015-12-02 卡皮科技私人有限公司 Method and device for covering and waterproofing joints in hydraulic works
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