CN114482135B

CN114482135B - Advanced water stop structure of basement outer wall post-pouring belt and construction method

Info

Publication number: CN114482135B
Application number: CN202210154515.1A
Authority: CN
Inventors: 李晓强; 刘强; 侯宇; 徐磊; 周山; 樊伟振; 马文杰; 宋淼; 李大双; 樊建伟; 秦伟; 郭启昊
Original assignee: City Construction Development Co Ltd of China Railway 16th Bureau Group Co Ltd
Current assignee: City Construction Development Co Ltd of China Railway 16th Bureau Group Co Ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2024-05-07
Anticipated expiration: 2042-02-21
Also published as: CN114482135A

Abstract

The invention discloses an advanced water-stopping structure of a basement outer wall post-pouring strip, which comprises an advanced water-stopping die, wherein the advanced water-stopping die is positioned at the outer side of a template of the basement outer wall post-pouring strip, and is connected with the basement outer wall and the template of the basement outer wall post-pouring strip, and can seal a gap between the basement outer wall and the basement outer wall post-pouring strip. The invention also provides a construction method of the basement outer wall post-pouring strip advanced water stop structure, the advanced water stop mould is arranged, coiled material waterproof layers are effectively prevented from being pulled apart due to factors such as backfill settlement and structure shrinkage settlement, the construction quality of the basement waterproof engineering is fundamentally ensured, the reliability of the basement outer wall post-pouring strip advanced water stop structure is improved, the advanced water stop mould is convenient to manufacture and install, a large amount of materials and labor investment can be saved, and the production cost is saved.

Description

Advanced water stop structure of basement outer wall post-pouring belt and construction method

Technical Field

The invention relates to the technical field of basement exterior wall construction, in particular to a basement exterior wall post-pouring strip advanced water stop structure and a construction method.

Background

The post-cast strip is a temporary construction joint reserved at the corresponding positions of the foundation slab, the wall and the beam according to the design or construction specification requirements in order to prevent harmful cracks possibly generated due to uneven self shrinkage or uneven settlement of a cast-in-situ reinforced concrete structure in building construction. The post-pouring belt temporarily divides the structure into a plurality of parts, the structure is contracted and settled stably in the components, and the construction joint concrete is poured and smashed after a plurality of times, so that the structure is connected into a whole. Underground works waterproof technical Specification (GB 50108-2001) 5.2.1: the post-cast strip is arranged at a position with smaller stress and deformation, the spacing is preferably 30-60 m, and the width is preferably 700-1000 mm; the construction of 5.2.4 post-cast strips should meet the following specifications: "post-cast strip should be constructed after the concrete age on both sides reaches 42d, but post-cast strip for high-rise buildings should be performed after the concrete 14d is poured on the structural ceiling.

In the current construction engineering field, the application of post-cast strip construction technology is very extensive, but in actual construction, because the time of setting aside of post-cast strip is longer, especially foundation raft and basement outer wall post-cast strip, must pour post-cast strip concrete again after the main part structure construction is accomplished, foundation ditch and basis expose for a long time, have a large amount of adverse factors and structural safety hidden danger, concretely, appear:

1. When the foundation is below the ground water level, foundation pit dewatering needs to be continuously carried out in the main body construction process, the ground water is ensured to be kept below the foundation, dewatering can be stopped after the main body structure is completed and the post-cast strip concrete is poured, and a large amount of construction cost is increased.

2. Under the action of day and night temperature difference, the basic outer wall is easy to generate telescopic cracks.

3. If the foundation pit is not backfilled in time after the foundation is finished, the potential safety hazard is very large, and the construction of the subsequent working procedures is affected.

In order to solve the contradiction, a post-cast strip advanced water stop structure is adopted in site construction, and the post-cast strip concrete is poured after the main body is finished after the external wall is waterproof, earthwork backfill and other subsequent procedures are carried out after the foundation is finished. This water stop configuration used in post-cast strip location and made prior to post-cast strip casting is referred to as an advanced water stop configuration. In the prior art, the advanced water stop structure of the basement outer wall generally adopts the following three methods:

1. and (3) a cast-in-situ guide wall method: referring to the advanced water stop construction method of the post-pouring belt of the 16G101-3 standard chart set P107, a concrete guide wall with an expansion joint is additionally arranged at the post-pouring belt part of the basement outer wall, the expansion joint is 30-40 mm wide, and an externally attached rubber water stop belt is arranged. Additional steel bars are arranged in the guide wall and are poured with the outer wall at the same time, and post-cast strips are reserved according to design requirements. And (3) externally attaching a waterproof coiled material after the exterior wall is poured, backfilling a foundation pit, pouring exterior wall post-pouring strip concrete after the design specified age requirement is met, and leading the water stop structure of the post-pouring strip cast-in-situ guide wall to be shown in figure 1.

The construction method needs to increase the construction amount of the steel bar installation and the cast-in-place concrete, has high construction cost and increases the workload; the guide wall template is complex to manufacture and install, and the variable cross section of the template is easy to run out and leak slurry; 3 concrete isolation measures of vertical surfaces are needed to be carried out at the post-pouring zone, the forming process is complex, and the quality is not easy to guarantee; the manual work and the material input are large, and the retention of the post-cast strip is time-consuming and labor-consuming.

2. Prefabricating a cover plate method: pouring the basement outer wall according to a conventional method, reserving a post-pouring belt, removing the outer wall concrete, installing and sealing the outer wall of the post-pouring belt by using a precast concrete cover plate with the thickness of 100mm, and tying with outer wall steel bars, and smearing waterproof mortar at the joint. And then performing outer wall coiled material waterproofing and foundation pit backfill construction, pouring outer wall post-cast strip concrete after the design and regulation age requirements are met, wherein the advanced water stop structure of the post-cast strip concrete precast slab is shown in fig. 2.

The construction method increases the manufacturing and installation engineering quantity of the prefabricated part, and the on-site installation needs to be equipped with hoisting machinery, so that the investment cost is high; gaps exist between the prefabricated cover plates and the outer wall, so that tight plugging is not easy to occur, and hidden leakage hazards are formed; the precast slab is rigidly connected with the outer wall, and the post backfill subsides and the structure self-shrinkage subsides easily cause the precast slab deformation displacement, thereby damaging the waterproof structure of the outer wall.

3. Brick construction retaining wall method: pouring the basement outer wall according to a conventional method, reserving a post-pouring belt, after removing a formwork from the concrete of the outer wall, building a 240mm thick brick wall outside the post-pouring belt, plastering waterproof mortar with the thickness of 20mm, then performing outer wall coiled material waterproof and foundation pit backfilling construction, pouring the concrete of the post-pouring belt after meeting the requirements of the design specified age, and building a retaining wall by the post-pouring belt brick, wherein the advanced water stopping structure is shown in fig. 3.

The construction method has the advantages of more working procedures, higher manual investment, disposable consumption and use of materials and higher cost; the external wall waterproof construction can be carried out after the masonry reaches a certain strength and the plastering layer is dried, the construction period is long, and the working efficiency is low; backfill subsidence and structure self shrinkage subsidence easily lead to brickwork fracture and coiled material waterproof layer to pull apart, cause underground waterproof engineering quality hidden danger.

Therefore, how to change the current situations that the construction cost is high and hidden leakage hazards exist in the advanced water stop construction process of the post-pouring zone of the basement outer wall in the prior art becomes a problem to be solved urgently by the person skilled in the art.

Disclosure of Invention

The invention aims to provide a basement outer wall post-cast strip advanced water stop structure and a construction method, which are used for solving the problems in the prior art, saving the basement outer wall post-cast strip construction cost and improving the reliability of the basement outer wall post-cast strip advanced water stop structure.

In order to achieve the above object, the present invention provides the following solutions: the invention provides an advanced water-stopping structure of a basement outer wall post-pouring strip, which comprises an advanced water-stopping die, wherein the advanced water-stopping die is positioned at the outer side of a template of the basement outer wall post-pouring strip, the advanced water-stopping die is connected with the basement outer wall and the template of the basement outer wall post-pouring strip, and the advanced water-stopping die can seal a gap between the basement outer wall and the basement outer wall post-pouring strip.

Preferably, the basement outer wall post-pouring strip advanced water stop structure further comprises:

One end of the steel plate water stop belt extends into the formwork of the basement outer wall, and the other end extends out of the formwork of the basement outer wall; the number of the steel plate water stops is two, and the two groups of the steel plate water stops are arranged on two sides of the basement outer wall post-pouring strip in the length direction;

the steel bar support is propped against the templates of the basement outer wall, the steel bar supports are arranged on two sides of the steel plate water stop belt, the surface of the steel bar support is parallel to the thickness direction of the basement outer wall, one side of the steel bar support is connected with the steel plate water stop belt, and the other side of the steel bar support is connected with built-in steel bars of the basement outer wall;

the quick and easy closing-in net is arranged on one side, far away from the formwork of the basement outer wall, of the steel bar bracket and is connected with the steel bar bracket;

the special-shaped water stop bolt penetrates through the steel plate water stop belt and is connected with the steel plate water stop belt, one end of the special-shaped water stop bolt is connected with the advanced water stop die, and the other end of the special-shaped water stop bolt is connected with a template of the basement outer wall post-pouring belt;

the steel bar supports can tightly prop against the special-shaped water stop bolts on the two groups of steel plate water stop belts.

Preferably, the advanced water stop die comprises a die frame and a die lining plate which are connected, wherein the die lining plate is arranged around the die frame, and the special-shaped water stop bolt penetrates through the die lining plate and is connected with the die frame.

Preferably, the die frame is made of steel profiles, an elongated nut is connected to the die frame, and the special-shaped water stop bolt is in threaded connection with the elongated nut.

Preferably, the cross section of the advanced water stop die is isosceles trapezoid, two die lining plates which are arranged in parallel are arranged parallel to the templates of the basement outer wall, and one die lining plate with larger width is arranged close to the basement outer wall post-pouring belt; the die lining plate is made of PPS plates.

Preferably, both ends of the steel plate water stop are provided with bending parts, and the bending parts are arranged towards the upstream surface.

Preferably, the steel bar support comprises vertical steel bars and transverse steel bars, the vertical steel bars are connected with the transverse steel bars, the number of the vertical steel bars is two, two parallel arrangement vertical steel bars are connected with the two ends of the transverse steel bars, the number of the transverse steel bars is multiple, and the transverse steel bars are arranged in parallel.

Preferably, the special-shaped water stop bolt comprises a screw rod, a water stop ring sleeved on the screw rod, a connecting nut and a mountain-shaped clamp, wherein the water stop ring is connected with the screw rod, the water stop ring is connected with the steel plate water stop belt, the connecting nut can prop against a template of the basement outer wall post-pouring belt, and the connecting nut and the mountain-shaped clamp are respectively in threaded connection with the screw rod.

Preferably, the steel bar support comprises a steel bar sleeve and two support bars, wherein the two support bars are in threaded connection with the steel bar sleeve, one end, far away from the steel bar sleeve, of each support bar is provided with a U-shaped bar, the bottom end of each U-shaped bar is close to the corresponding steel bar sleeve, each steel bar water stop strip extends into an opening of each U-shaped bar, Y-shaped openings are formed in the side edges of the corresponding U-shaped bars, planes of the Y-shaped openings are parallel to the corresponding steel bar water stop strips, and the Y-shaped openings are propped against the corresponding special-shaped water stop bolts.

The invention also provides a construction method of the basement outer wall post-pouring strip advanced water stop structure, the advanced water stop mould is installed, the advanced water stop mould is connected with the basement outer wall and the templates of the basement outer wall post-pouring strip, basement outer wall concrete is poured, waterproof protection layers are paved on the outer sides of the basement outer wall and the advanced water stop mould, a foundation pit is backfilled, and the basement outer wall post-pouring strip concrete is poured.

Compared with the prior art, the invention has the following technical effects: the advanced water-stopping structure of the basement outer wall post-pouring strip comprises an advanced water-stopping die, wherein the advanced water-stopping die is positioned on the outer side of a template of the basement outer wall post-pouring strip, and is connected with the basement outer wall and the template of the basement outer wall post-pouring strip, and can seal a gap between the basement outer wall and the basement outer wall post-pouring strip.

According to the basement outer wall post-pouring strip advanced water-stopping structure, the advanced water-stopping mould is arranged, so that the advanced water-stopping mould is connected with the basement outer wall and the templates of the basement outer wall post-pouring strip, then concrete pouring of the basement outer wall and the basement outer wall post-pouring strip is carried out, coiled material waterproof layer pulling crack caused by factors such as backfill settlement and structural shrinkage settlement is effectively avoided, the defects of complex working procedures and serious leakage hidden danger in the existing basement outer wall post-pouring strip construction are overcome, the reliability of the basement outer wall post-pouring strip advanced water-stopping structure is improved, the advanced water-stopping mould is convenient to manufacture and install, a large amount of materials and labor investment can be saved, and the production cost is saved.

The invention also provides a construction method of the basement outer wall post-pouring strip advanced water stop structure, an advanced water stop mould is installed, the advanced water stop mould is connected with the basement outer wall and a template of the basement outer wall post-pouring strip, basement outer wall concrete is poured, waterproof protection layers are paved on the outer sides of the basement outer wall and the advanced water stop mould, a foundation pit is backfilled, and basement outer wall post-pouring strip concrete is poured. The construction method of the basement outer wall post-pouring strip advanced water stop structure fundamentally ensures the construction quality of the underground waterproof engineering, is convenient to operate and improves the construction efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a post-cast strip cast-in-situ guide wall advanced water stop structure in the prior art;

FIG. 2 is a schematic diagram of a post-cast strip concrete precast slab advanced water stop structure in the prior art;

FIG. 3 is a prior art advanced water stop construction for post-cast strip masonry retaining walls;

FIG. 4 is a schematic structural view of an advanced water stop die of an advanced water stop structure of a basement exterior wall post-cast strip of the present invention;

FIG. 5 is a schematic top view of an advanced water stop die of the advanced water stop construction of the basement exterior wall post-cast strip of the present invention;

FIG. 6 is a schematic structural view of a mold frame of an advanced water stop mold of the advanced water stop construction of the basement exterior wall post-cast strip of the present invention;

FIG. 7 is a schematic view of a part of a structure of an advanced water stop die of an advanced water stop structure of a basement exterior wall post-cast strip;

FIG. 8 is a schematic structural view of a special-shaped water stop bolt with an advanced water stop structure for a basement exterior wall post-cast strip;

FIG. 9 is a schematic front view of a reinforcement brace of the advanced water stop construction of the basement exterior wall post-cast strip of the present invention;

FIG. 10 is a schematic top view of a reinforcement brace of the advanced water stop construction of the basement exterior wall post-cast strip of the present invention;

FIG. 11 is a schematic structural view of a reinforcing steel bar bracket with an advanced water stop structure for a basement exterior wall post-cast strip;

FIG. 12 is a schematic installation view of a basement exterior wall post-cast strip advanced water stop structure of the present invention;

FIG. 13 is a schematic view of the assembled basement exterior wall form of the present invention;

FIG. 14 is a schematic view of the cross-sectional structure taken along the direction A-A in FIG. 13;

FIG. 15 is a schematic view of a basement exterior wall post-cast strip advanced water stop construction of the present invention;

Wherein 1 is an advanced water stop die, 101 is a die frame, 102 is a die lining plate, 103 is a lengthened screw cap, 2 is a steel plate water stop belt, 201 is a bending part, 3 is a steel bar support, 301 is a vertical steel bar, 302 is a transverse steel bar, 4 is a quick and easy-to-close-up net, 5 is a special-shaped water stop bolt, 501 is a screw rod, 502 is a water ring, 503 is a connecting screw cap, 504 is a mountain-shaped clamp, 6 is a steel bar support, 601 is a steel bar sleeve, 602 is a support rod, 603 is a U-shaped rod, 604 is a Y-shaped opening, 7 is a three-section water stop bolt, 8 is a steel pipe main keel, 9 is a square wood secondary keel, 10 is an outer wall template, 11 is an outer wall inner side template, 12 is a waterproof protection layer, and 13 is an outer wall steel bar.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 4-15, fig. 4 is a schematic structural view of an advanced water stop mold of an advanced water stop structure of a post-pouring strip of a basement outer wall of the present invention, fig. 5 is a schematic plan view of an advanced water stop mold of an advanced water stop structure of a post-pouring strip of a basement outer wall of the present invention, fig. 6 is a schematic structural view of a mold frame of an advanced water stop mold of an advanced water stop structure of a post-pouring strip of a basement outer wall of the present invention, fig. 7 is a schematic structural view of a portion of an advanced water stop mold of an advanced water stop structure of a post-pouring strip of a basement outer wall of the present invention, fig. 8 is a schematic structural view of a special-shaped water stop bolt of an advanced water stop structure of a post-pouring strip of a basement outer wall of the present invention, fig. 9 is a front view schematically showing a reinforcing bar support of a basement outer wall post-cast strip advanced water stop structure of the present invention, fig. 10 is a top view schematically showing a reinforcing bar support of a basement outer wall post-cast strip advanced water stop structure of the present invention, fig. 11 is a structural view schematically showing a reinforcing bar support of a basement outer wall post-cast strip advanced water stop structure of the present invention, fig. 12 is a structural view schematically showing a basement outer wall post-cast strip advanced water stop structure of the present invention, fig. 13 is a structural view schematically showing a basement outer wall form of the present invention after installation, fig. 14 is a sectional structural view schematically showing a direction A-A in fig. 13, and fig. 15 is a schematic view of a basement outer wall post-cast strip advanced water stop structure of the present invention.

The invention provides an advanced water-stopping structure of a basement outer wall post-pouring strip, which comprises an advanced water-stopping die 1, wherein the advanced water-stopping die 1 is positioned at the outer side of a template of the basement outer wall post-pouring strip, the advanced water-stopping die 1 is connected with the basement outer wall and the template of the basement outer wall post-pouring strip, and the advanced water-stopping die 1 can seal a gap between the basement outer wall and the basement outer wall post-pouring strip.

According to the basement outer wall post-pouring strip advanced water-stopping structure, the advanced water-stopping die 1 is arranged, so that the advanced water-stopping die 1 is connected with the basement outer wall and the templates of the basement outer wall post-pouring strip, then concrete pouring of the basement outer wall and the basement outer wall post-pouring strip is carried out, the defects of complex procedures and serious hidden leakage hazards existing in the existing basement outer wall post-pouring strip construction are overcome, the reliability of the basement outer wall post-pouring strip advanced water-stopping structure is improved, the advanced water-stopping die 1 can be used as the templates of the basement outer wall post-pouring strip, and in addition, the advanced water-stopping die 1 is convenient to manufacture and install, a large amount of materials and labor investment can be saved, and the production cost is saved.

Specifically, the basement outer wall post-cast strip advanced water stop structure further comprises a steel plate water stop strip 2, a steel bar bracket 3, a quick and easy closing-up net 4, a special-shaped water stop bolt 5 and a steel bar support 6. One end of the steel plate water stop belt 2 extends into the template of the basement outer wall, the other end extends out of the template of the basement outer wall, and the steel plate water stop belt 2 is arranged in the middle of the wall thickness of the basement outer wall so as to improve structural uniformity; the number of the steel plate water stops 2 is two, the two groups of the steel plate water stops 2 are arranged on two sides of the length direction of the basement outer wall post-cast strip, and the two groups of the steel plate water stops 2 are symmetrically arranged by taking the central line of the basement outer wall post-cast strip as an axis.

The steel bar support 3 is propped against the formwork of the basement outer wall, the steel bar supports 3 are arranged on two sides of the steel plate water stop belt 2, the surface of the steel bar support 3 is parallel to the thickness direction of the basement outer wall, one side of the steel bar support 3 is connected with the steel plate water stop belt 2, and the other side of the steel bar support 3 is connected with built-in steel bars of the basement outer wall; the steel bar bracket 3 can be welded and connected with the steel plate water stop belt 2 and the built-in steel bars respectively, so that the structural strength is improved.

Meanwhile, the quick and easy closing-in net 4 is arranged on one side of the reinforcing steel bar support 3, which is far away from the formwork of the basement outer wall, and the quick and easy closing-in net 4 is connected with the reinforcing steel bar support 3; in this embodiment, quick and easy binding off net 4 is fixed with reinforcing bar support 3 ligature, and quick and easy binding off net 4 can select 0.5mm ~ 1.0mm, mesh interval is less than 30 mm's quick and easy binding off net 4, and in actual construction process, the specification of quick and easy binding off net 4 can be adjusted according to specific construction requirement.

The special-shaped water stop bolts 5 penetrate through the steel plate water stop strips 2 and are connected with each other, the steel plate water stop strips 2 can be perforated in advance, the special-shaped water stop bolts 5 are convenient to penetrate through, one ends of the special-shaped water stop bolts 5 are connected with the advanced water stop mould 1, and the other ends of the special-shaped water stop bolts 5 are connected with the templates of the basement outer wall post-pouring strips so as to realize connection of the advanced water stop mould 1 with the basement outer wall templates 10 and the basement outer wall post-pouring strip templates.

In addition, the steel bar supports 6 can tightly prop against the special-shaped water stop bolts 5 on the two groups of steel plate water stop strips 2, so that the stability of the steel plate water stop strips 2 and the special-shaped water stop bolts 5 is improved, and the concrete pouring of the subsequent basement outer wall post-pouring strip is facilitated.

More specifically, the advanced water stop die 1 comprises a die frame 101 and a die lining plate 102 which are connected, the die lining plate 102 is arranged around the die frame 101, the special-shaped water stop bolts 5 penetrate through the die lining plate 102 and are connected with the die frame 101, the die frame 101 facilitates connection of the special-shaped water stop bolts 5 with the advanced water stop die 1, and meanwhile, the structural strength of the advanced water stop die 1 is improved.

The die frame 101 is made of steel profiles, the die frame 101 is connected with an extension screw cap 103, the extension screw cap 103 is connected with the die frame 101 in a welding mode, the special-shaped water stop bolt 5 is connected with the extension screw cap 103 in a threaded mode, and the special-shaped water stop bolt 5 is connected with the advanced water stop die 1 conveniently. In this embodiment, the mold frame 101 is made of square steel and angle steel, and in other embodiments of the present invention, the material and specification of the mold frame 101 may be selected according to the actual working conditions.

In this embodiment, the cross section of the advanced water stop die 1 is isosceles trapezoid, two parallel mold lining plates 102 are parallel to the formwork of the basement outer wall, one mold lining plate 102 with a larger width is close to the basement outer wall post-pouring zone, and two mold lining plates 102 forming isosceles trapezoid waists are obliquely arranged, so that the advanced water stop die 1 and the basement outer wall are in smooth transition, and the building aesthetic property is improved. The die lining plate 102 is made of PPS plate, the PPS plate has stable performance and excellent flame retardant performance, and the reliability of the advanced water stop die 1 is improved. In other embodiments of the present invention, the mold liner 102 of other materials may be selected according to specific construction criteria, thereby improving flexibility and adaptability of construction.

It should be further noted that, both ends of the steel plate water stop 2 are provided with bending portions 201, the bending portions 201 are arranged towards the upstream surface, the steel plate water stop 2 is provided with bending portions 201, the connection strength of the steel plate water stop 2 and concrete is improved, the burial depth of the steel plate water stop 2 is one half of the width of the steel plate water stop, and the structural stability is further improved.

In other specific embodiments of the present invention, the steel bar bracket 3 includes two vertical steel bars 301 and two horizontal steel bars 302, the vertical steel bars 301 are connected with the horizontal steel bars 302, two ends of the horizontal steel bars 302 are connected with the two vertical steel bars 301 arranged in parallel, the number of the horizontal steel bars 302 is multiple, the multiple horizontal steel bars 302 are arranged in parallel, the steel bar bracket 3 can position the steel plate water stop 2, and simultaneously provides a supporting function for the quick-easy-closing net 4, and the steel plate water stop 2 is arranged symmetrically by taking the steel plate water stop 2 as an axis.

Further, the special-shaped water stop bolt 5 comprises a screw 501, a water stop ring 502 sleeved on the screw 501, a connecting nut 503 and a mountain-shaped clamp 504, wherein the water stop ring 502 is connected with the screw 501, the water stop ring 502 is connected with the steel plate water stop belt 2, the connecting nut 503 can be abutted against a template of the basement outer wall post-pouring belt, and the connecting nut 503 and the mountain-shaped clamp 504 are respectively in threaded connection with the screw 501. Screw rod 501 one end and the extension nut 103 threaded connection of mould frame 101, water-stop ring 502 is fixed in on screw rod 501, and after screw rod 501 passed the preformed hole of steel sheet waterstop 2, water-stop ring 502 and steel sheet waterstop 2 welding link to each other, screw rod 501 passes the template of basement outer wall post-cast strip of steel sheet waterstop 2's one end continuation, connecting nut 503 can offset in the template of basement outer wall post-cast strip to the relative position between fixed steel sheet waterstop 2 and the template of basement outer wall post-cast strip provides convenience for subsequent concrete placement, the one end of the template of basement outer wall post-cast strip of screw rod 501 pass with mountain-shaped card 504 threaded connection, the installation and the adjustment position of being convenient for.

In addition, the steel bar support 6 comprises a steel bar sleeve 601 and two support rods 602, the two support rods 602 are in threaded connection with the steel bar sleeve 601, one end of each support rod 602, far away from the steel bar sleeve 601, is provided with a U-shaped rod 603, the bottom end of each U-shaped rod 603 is close to the steel bar sleeve 601, the steel plate water stop belt 2 stretches into an opening of each U-shaped rod 603, the side edge of each U-shaped rod 603 is provided with a Y-shaped opening 604, the plane where the Y-shaped opening 604 is located is parallel to the steel plate water stop belt 2, and the Y-shaped opening 604 abuts against the special-shaped water stop bolt 5. The special-shaped water stop bolts 5 are tightly propped by the Y-shaped openings 604 on two sides of the U-shaped rod 603, and the two support rods 602 are in threaded connection with the steel bar sleeve 601, so that the propping force of the support rods 602 can be adjusted, the steel bar support 6 can be used for oppositely propping and reinforcing the special-shaped water stop bolts 5 on two sides of the post-pouring strip of the basement outer wall, and stable support is provided for the concrete pouring of the post-pouring strip of the basement outer wall.

Furthermore, the invention also provides a construction method of the basement outer wall post-pouring strip advanced water stop structure, wherein an advanced water stop mould 1 is installed, the advanced water stop mould 1 is connected with the basement outer wall and a template of the basement outer wall post-pouring strip, basement outer wall concrete is poured, a waterproof protection layer 12 is paved on the outer sides of the basement outer wall and the advanced water stop mould 1, a foundation pit is backfilled, and basement outer wall post-pouring strip concrete is poured. The construction method of the advanced water stop structure of the basement outer wall post-pouring strip solves the problems of complex process, high cost, low work efficiency, serious leakage hidden danger and the like in the existing basement outer wall post-pouring strip construction, fundamentally ensures the construction quality of the basement waterproof engineering, is simple to manufacture, convenient and fast to install, stable and reliable to fix, and can be installed in place at one time, has the dual functions of the basement outer wall post-pouring strip template and the advanced water stop strip, has less auxiliary material investment, saves production cost and improves construction efficiency.

The construction method of the basement exterior wall post-cast strip advanced water stop structure of the invention is further explained by specific examples.

Example 1

1. The construction method comprises the following operation flow:

Manufacturing an advanced water stop die 1, measuring and lofting, constructing a foundation, binding outer wall steel bars 13, welding a steel plate water stop belt 2, installing a steel bar support 3, binding a quick and easy closing net 4, installing the advanced water stop die 1, installing a special-shaped water stop bolt 5 and a steel bar support 6, sealing a post-pouring belt inner die, installing and reinforcing an outer wall template 10, quality checking, pouring outer wall concrete, waterproofing an outer wall, backfilling a foundation pit, cleaning and roughening a construction joint, pouring outer wall post-pouring belt concrete, removing a die and curing

2. The manufacturing steps of the basement outer wall post-pouring strip advanced water stop structure are as follows:

(1) Manufacturing step of advanced water stop die 1

The advanced water stop die 1 is made of a die frame 101 and a die lining plate 102 and is reinforced by special-shaped water stop bolts 5, reinforcing steel bar supports 6 and a quick and easy-closing net 4. Wherein, a 50 x 4mm square welded pipe, 50 x 5mm angle steel, an M12 lengthened nut 103 and a 17.5mm thick PPS plate are combined into an advanced water stop die 1; the special-shaped water stop bolt 5 is formed by combining an M12 screw 501, a steel plate water stop ring 502, a connecting nut 503 and a mountain-shaped clamp 504; manufacturing a steel bar support 6 by using phi 16 steel bars and M16 straight thread steel bar sleeves 601; the phi 16 steel bar support 3 and the quick and easy closing steel plate net are combined to be used as the fracture end mould of the post-pouring strip of the outer wall, and the specific dimensions and the manufacturing method of each part are as follows:

Manufacturing advanced water stop die 1

Cutting out 3 square welded pipes with the length of 50mm or 4mm, wherein the blanking length is L+400mm (L is post-pouring bandwidth), and two ends of each square welded pipe are respectively cut into 45-degree grooves; intercepting 4 pieces of angle steel with the length of 50mm and 5mm, wherein the blanking length is 425mm. The square welded pipe and the angle steel are welded into a die frame 101 according to fig. 3, single-sided welding is adopted, and the height of a welding line is 6mm. 9M 12 lengthened nuts 103 are prepared, the length is 45mm, the nuts are welded on a square welded pipe horizontally according to the figure 3, double-sided welding is adopted, and the height of a welding seam is 5mm.

The 17.5mm thick PPS plate is used as the die lining plate 102, and the PPS plate is also called polyphenylene sulfide, is a high-rigidity white powder polymer with crystallization degree (55% -65%), and has the advantages of high heat resistance, mechanical strength, rigidity, flame resistance, chemical resistance, electrical insulation and dimensional stability, low abrasion, low shrinkage, excellent creep resistance and excellent flame retardance. Has self-extinguishing property, impact resistance, oxidation resistance and good affinity with various inorganic fillers. After the PPS plate is cut according to the size of the die frame 101, M4 x 20 self-tapping and self-drilling dovetails are used for anchoring the PPS plate to the frame, the distance between the anchoring nails is 200mm, and the peripheral edges are flush with the frame. The side edges of the vertical faces are covered by PPS (polyphenylene sulfide) battens, and strong glue is adopted to firmly adhere to the panels, so that tight and smooth joints are ensured.

(2) Manufacturing of special-shaped water stop bolt 5

The special-shaped water stop bolt 5 is manufactured by using the M12 three-section water stop bolt 7 according to fig. 8, a 50 mm-4 mm steel plate water stop ring 502 is welded at the middle part of the wall thickness, single-sided welding is performed, and the welding seam height is 5mm.

(3) Manufacturing a reinforcing bar support 6

The steel bar support 6 is manufactured by adopting phi 16 steel bars and is divided into two sections, one end of the U-shaped bar 603 is welded with the phi 16 steel bar, the end part of the U-shaped bar 603 is provided with a Y-shaped opening 604, the other end of the U-shaped bar is connected with an M16 straight thread sleeve thread and a screw thread sleeve thread, the screw thread length is 23mm, an M16 positive and negative screw thread type straight thread steel bar sleeve 601 is used for connecting, and the joint part avoids the center position of an external wall post-pouring belt so as to prevent the steel bar sleeve 601 from colliding with a special-shaped water stop bolt 5, and the structure of the steel bar support 6 is shown in fig. 9 and 10 in detail.

(4) Manufacturing a reinforcing steel bar bracket 3

The steel bar bracket 3 is manufactured by adopting phi 16 steel bars, a rectangular steel bar frame is welded, the joint of the steel bars is welded on one side, the height of a welding line is 5mm, and the structure of the steel bar bracket 3 is shown in figure 11 in detail.

3. The construction method comprises the following specific operation steps:

(1) Lofting of measurement

And measuring and placing the edges of the foundation and the post-pouring strip of the outer wall on the foundation cushion layer according to the designed position, ejecting ink lines by using an ink duct, and marking by using red paint.

(2) Foundation construction

The foundation structure construction stage is divided into a plurality of construction sections according to post-pouring zone positions, foundation templates are installed after foundation steel bars are bound, and embedded pipe fittings, reserved holes and the like are installed in synchronous cooperation with other work types. The foundation post-pouring belt adopts the combination of the quick and easy closing-up net 4 and the reinforcing steel bar support 3 of the thick reinforcing steel bar, is used for the joint treatment of a permanent template and a construction joint, is convenient for penetrating the reinforcing steel bars and continuously binding the reinforcing steel bars, can cut off grids when the reinforcing steel bars with slightly larger diameters pass through the back plate to be positioned, and can be installed before the binding of the reinforcing steel bars, and then penetrates the reinforcing steel bars through the meshes of the quick and easy closing-up net 4.

The water sealing method of the base post-pouring belt bottom plate refers to the advanced water sealing structure of the post-pouring belt of the 16G101-3 standard atlas P107, and the water sealing method of the base post-pouring belt outer vertical surface refers to the advanced water sealing structure of the basement outer wall.

(3) Binding basement exterior steel bar 13

And (3) popping up a steel bar position line, a template control line, a wall body and a door and window opening position line on the bottom plate concrete, picking up slurry and stone residues, and cleaning. Correcting the position of a throwing vertical bar, binding hidden posts and gate lintel steel bars, installing prefabricated vertical ladder bars, arranging 2 vertical ladder bars on each wall, binding horizontal ladder bars at the top, and binding wall body distribution steel bars. The horizontal ribs of the wall body are outside, the vertical ribs are inside, the vertical ribs are firstly lengthened and then penetrated, the first horizontal rib is 50mm away from the bottom plate, and then the horizontal ribs are installed according to the stepped spacing of the vertical ladder ribs. All the steel bar crossing points are bound point by adopting 20# binding wires to form splayed buckles. And binding the connecting beam steel bars, wherein the length of the main beam steel bars anchored into the hidden columns at the two sides of the hole meets the design anchoring requirement.

The double-F-shaped clamping steel bars are adopted between the double-row steel bars of the wall body to control displacement, the distance between the frameworks of the double-row steel bars is fixed, the double-F-shaped clamping steel bars are distributed on the upper, middle and lower sides of the wall body, and the double-F-shaped clamping steel bars are made of phi 12 steel bars. The outside of the wall rib is provided with reinforcing steel bar protection layer cushion blocks which are arranged in a plum blossom shape, and the interval is 600mm. The overlapping range of the vertical reinforcing steel bars 301 of the wall body is bound with at least 3 horizontal reinforcing steel bars so as to ensure the force transmission reliability of the vertical overlapping reinforcing steel bars.

(4) Welded steel plate water stop 2

The specification of the steel plate water stop belt 2 is 300mm x 3mm cold-rolled steel plate, the width of the bending part 201 is 30 mm-50 mm, and the steel plate water stop belt 2 is provided with phi 12 bolt holes corresponding to the center position of the lengthened screw cap 103 on the advanced water stop die 1 in advance. The embedded depth is half of the width of the steel plate water stop 2, the concave surface formed by the bending part 201 faces the upstream surface, and the embedded depth is symmetrically arranged on two sides of the post-cast strip of the basement outer wall.

The process flow comprises the following steps: positioning the steel plate water stop belt 2, temporarily fixing, welding a joint, positioning and welding, and checking and accepting.

After the position of the steel plate water stop belt 2 is determined, the steel plate water stop belt is fixed by utilizing the temporary up-and-down spot welding of the wall lacing wire, and then the joint welding of the steel plate water stop belt 2 is carried out, wherein the lap joint length is 50mm. The steel plate water stop belt 2 is welded into double-sided full welding, 2mm welding seams are reserved at joints after the two-sided full welding, the middle and two ends are fixed by spot welding firstly during the first welding, then the welding is performed from the middle to one end until the end is reached, then the welding is performed from the other end to the middle, the coating is immediately knocked off by a welding hammer after the first welding, and whether the sand holes exist or not and the welding leakage positions are checked if the repair welding is needed. The second pass starts the welding in the same order on the back side of the steel plate. The positioning of the steel plate water stop belt 2 is reinforced by welding the steel bar bracket 3 and is connected with the outer wall steel bars 13. The wall lacing wire passing through the steel plate water stop belt 2 is welded on the steel plate water stop belt 2 after being cut off, and a lacing wire is additionally arranged at the cutting position of the lacing wire to be used as a reinforcing steel bar.

When the steel plate water stop belt 2 is welded, water is strictly forbidden to cool the welding seam, and measures are taken to shield the welding seam if the welding seam is in rainy days. The welding seam is required to be full, slag inclusion, sand hole and burn and undercut are avoided, the steel plate at the joint is free from deformation and warping, the water stop steel plate is correct in position and elevation, and after self-inspection is qualified, a report and supervision engineer checks and accepts.

(5) Mounting bar support 3

The steel bar support 3 is arranged on the outer side of the edge of the post-pouring strip, one end of the steel bar support is welded on the steel plate water stop 2, the other end of the steel bar support is welded with the horizontal steel bars of the outer wall, the steel plate water stop 2 is positioned, a supporting framework is provided for a quick-easy-closing-in net 4 at the position of the post-pouring strip, and the steel bar support 3 is symmetrically arranged on two sides of the post-pouring strip.

(6) Binding fast easy-closing net 4

The quick and easy closing-up net 4 with the diameter of 0.5 mm-1.0 mm and the mesh spacing of less than 30mm is adopted to be bound on the inner side of the steel bar bracket 3 and used as a permanent template and the joint treatment of a construction joint. The quick and easy closing net 4 is used as a fracture template of the post-pouring belt, when concrete is poured, the complementary angle pieces on the meshes are embedded in the concrete to form a mechanical wedge connected with adjacent pouring blocks, a shearing interface is increased, the quality of joints is strictly controlled, the strength in the aspects of bonding and shearing is good, the mechanical property is good, the lateral pressure is small, the pouring process can be directly observed, and the naked eyes can monitor the pouring process due to the special meshes, so that the risks of pores and honeycombs are reduced.

Simultaneously, the steel bar is convenient to penetrate and continuously bind, and the outer wall horizontal steel bar can penetrate by slightly exerting force due to the porosity of the closing net and the densely distributed special grid. The large-diameter steel bars can be cut off from the grid, and the grid is cut off after the steel bars pass through make a comeback positions. The quick and easy closing net 4 can also be arranged before binding the reinforcing steel bars, and then penetrates the reinforcing steel bars through meshes of the quick and easy closing net.

(7) Advanced water stop die 1

The phi 12 bolt holes reserved on the corresponding water stop steel plates penetrate into the special-shaped water stop bolts 5 and cling to the outer sides of the reinforcing steel bar brackets 3. And then installing the mould lining plates 102 block by block, screwing one end of the special-shaped water stop bolt 5 into the M12 lengthened screw cap 103 welded on the mould frame 101, enabling the front end of the screw 501 to be flush with the outer edge of the mould frame 101, adjusting the position and the verticality of the mould frame 101 according to a template control line on a foundation slab, welding a steel plate water stop ring 502 on the special-shaped water stop bolt 5 with the steel plate water stop belt 2 after meeting the requirements, adopting single-sided girth welding, enabling the height of a welding line to be 3mm, immediately knocking off a coating with a welding hammer after the welding is finished, checking whether a sand hole exists or not and a welding leakage part, and if repair welding is required, tightly sealing the bolt hole on the steel plate water stop belt 2, and ensuring full and no leakage of the welding line. The advanced water stop die 1 and the outer wall steel bars 13 are effectively tied through the special-shaped water stop bolts 5 and the steel plate water stop belts 2, and meanwhile, a space for stress buffering is provided, after the outer wall concrete pouring is completed, the advanced water stop die 1 and the outer wall of the basement are connected into a whole, and coiled material waterproof layers are effectively prevented from being pulled apart due to factors such as backfill settlement and structural shrinkage settlement, so that hidden danger of quality of underground waterproof engineering is eliminated.

(8) Mounting reinforcing bar support 6

The steel bar supports 6 are arranged in the post-pouring zone and are oppositely reinforced with special-shaped water stop bolts 5 on two sides, the vertical distance is 600mm, and the stress is adjusted through an M16 straight thread steel bar sleeve 601. And then the inner side template of the post-pouring strip of the outer wall is closed, the special-shaped water stop bolts 5 are used for oppositely pulling and fixing, and the installation schematic diagram of the advanced water stop die 1 and the quick and easy closing-up net 4 is shown in fig. 12 in detail.

(9) The external wall form 10 is installed and reinforced

The basement exterior wall template 10 outside the post-cast strip adopts a 1220mm multiplied by 2440mm multiplied by 15mm double-sided film-covered wood glue template, and the cutting and the complement of the whole template are insufficient. After the template is cut by a saw, the saw cut is brushed and glued tightly in time so as to ensure the using times. The templates are manufactured in a blocking mode, 50mm square timber with 70mm square timber is adopted as the square timber secondary joist 9, the horizontal spacing is 250mm, the panel and the secondary joist are nailed by inch nails according to the 300mm spacing, and tongue-and-groove connection modes are adopted between the templates and the corner molds, so that tight joint and no slurry leakage are ensured.

The inclined support adopts phi 48 to 3.5 steel pipes, the main steel pipe keel 8 adopts double phi 48 to 3.5 steel pipes, the distance is not more than 600mm, the main secondary keel is oppositely pulled by adopting M12 three-section water stop bolts 7, the rigidity of the whole template is enhanced, the distance between oppositely pulled bolts is 450mm, the mountain-shaped fastener is sleeved, and the main steel pipe keel is tightly screwed and fixed by using 2 nuts.

The joint part of the outer side template and the advanced water stop die 1 is cut into an oblique angle of 45 degrees in advance, the secondary joist is arranged at the joint part corresponding to the original edge pressing angle of the advanced water stop die 1 and tightly pressed and nailed, the main joist is arranged in a through length mode, uneven plate surfaces at the joint part of the template are prevented, and the joint of the template is tightly sealed by a sponge adhesive tape to prevent slurry leakage. The cleaning opening is reserved at the bottom of the wall end, and the wall is plugged before concrete is poured. The basement exterior wall formwork 10 is shown in fig. 13 and 14 in the installed configuration.

(10) Concrete pouring for outer wall

Before the exterior wall concrete is poured, the quality inspector performs quality inspection on the reinforcing condition of the template and the scaffold and the binding and installing condition of the steel bars, and the exterior wall concrete is poured after the inspection and acceptance. Adopting commercial concrete pumping mould, uniformly paving stone-reducing concrete with the thickness of 50-100 mm and the same mixing ratio with wall concrete at the bottom before pouring, and pouring along with paving without using hopper. The wall body concrete is layered and fed, the casting speed is strictly mastered, the feeding position is at the wall body entity, the two sides of the hole are fed at the same time, the concrete drop at the two sides is at most one layer, the dense positions of the reinforcing steel bars are avoided, and the thickness of each layer of the molded body is strictly controlled to be not more than 1.25 times the effective acting length of the vibrating rod, namely not more than 45cm.

In the concrete vibrating process, the vibrating rod is slightly pumped up and down, so that the vertical vibration is uniform, the moving distance of the vibrating rod is not more than 1.5 times of the acting radius of the vibrating rod, collision of reinforcing steel bars, templates, embedded parts and electric junction boxes is avoided, when the layer of concrete is vibrated, the lower layer of concrete is inserted into the lower layer of concrete for 5cm, the vibrating time of each point is preferably 20-30 s, and the surface of the concrete is not obviously sunk, no bubbles appear any more and mortar is flooded out. In order to prevent the deformation of the hole, the two sides of the hole need to be vibrated at the same time.

The strength of the concrete of the outer wall reaches 1.2MPa, and the side mold can be removed after the surface and the edges and corners of the concrete are not damaged by removing the mold plate. And removing the other outer wall side molds except the advanced water stop mold 1 and the special-shaped water stop bolts 5. When the side mould is used, impact load is not formed on floors, and when concrete is adsorbed or bonded to the mould locally, a crow bar can be used for slightly loosening the joint of the lower opening of the mould, so that the mould is prevented from being knocked. And after the template is removed, cleaning the plate surface in time, and brushing a release agent to prevent bonding mortar. The removed templates and the supports are transported to a storage place in time, the templates are kept flat, and the templates are stacked according to specification. The detached steel bar supports are collected and cleaned in time, surface mortar is removed for continuous turnover use, and meanwhile, the covering protection of the outer wall post-cast strip and the waterproof and antirust work of the steel bars are finished.

(11) Waterproof construction of outer wall

The waterproof of the basement outer wall adopts two layers of SBS waterproof coiled materials, the construction is carried out by adopting an external-prevention external-sticking method, and the waterproof coiled materials are paved and stuck by adopting a full-sticking method. The process flow comprises the following steps: checking and cleaning a base layer, brushing a base layer treating agent, pasting an additional layer, pasting a bottom waterproof roll, pasting a surface waterproof roll, fixing and sealing a receiving head, cleaning, checking and repairing, checking and accepting quality, and obtaining the waterproof protective layer 12.

① And (3) base layer treatment: before construction, the surface of the waterproof base layer is inspected, the base surface is flat, firm, clean and dry, screw holes on the surface of the wall body are sealed, the internal corners and the external corners of the internal and external corners of the external and internal corners of the external are made into circular arcs, and the radius R of the circular arcs is=50mm.

② Brushing a base layer treating agent: the long handle rolling brush is used for brushing the base layer treating agent (cold primer) on the surface of the base layer, and the base layer is required to be uniformly brushed and cannot be brushed or exposed. After the coating is finished, the coating is dried for more than 8 hours, and the coiled material construction by a hot melting method can be performed.

③ Sticking an additional felt: after the base layer is dried, an additional layer of coiled material is added at the female corner, the male corner and the corner, the width is 500mm, and the width of each side is 250mm, so that the cracking resistance of the coiled material waterproof layer is improved.

④ Coiled material paving

And (3) popping up a laying datum line on the surface of the base layer according to the width of the coiled material, uniformly heating the back surfaces of the base layer treating agent and the coiled material by using a blast lamp, so that the coiled material cannot be excessively heated or burnt through, the blast lamp is about 0.3m away from the coiled material, immediately rolling and laying the coiled material after the surface of the coiled material is hot melted, flattening and compacting, and uniformly applying force. When scraping edge, the middle part is extruded outwards, and the whole part is scraped, so that the air below the coiled material is discharged completely, and no empty drum phenomenon occurs. When rolling and paving coiled materials, the joint part must overflow asphalt hot melt adhesive, and the seal should be scraped immediately to tightly bond the joint. The coiled material after being laid should be flat, straight and correct in lap joint size and must not be distorted.

The overlapping length of the short sides and the long sides of the two coiled materials is not less than 100mm, when the double-layer coiled materials are paved, the joints of the upper layer and the lower layer and the adjacent two coiled materials are staggered by 1/3 breadth, and the two coiled materials cannot be paved vertically. The coiled materials with the planes and the vertical surfaces connected are sewn and paved from bottom to top, the seams are reserved on the planes, and the distance from the joints to the vertical surfaces is not smaller than 600mm.

Waterproof fortification height of basement outer wall coiled material: the height of the outdoor terrace is 500mm or more, the coil material at the closing position is heated to overflow the asphalt hot melt adhesive, and then the joint is tightly bonded by scraping and sealing the joint, and the joint is fixedly embedded and protected by rubber asphalt caulking paste.

⑤ Waterproof protective layer 12: and immediately performing protective layer construction after the waterproof layer is accepted, adhering 50mm thick polystyrene boards to the outer wall for protection, adhering by using polyvinyl acetate glue, and performing joint pressing treatment on the sealed end sealing part by using waterproof mortar.

(12) Backfilling of foundation pit

And cleaning up the garbage and sundries of the substrate before backfilling, and cleaning up the position of the elevation of the substrate. The backfill soil is prepared from foundation pit undisturbed soil, the optimal water content of the soil is controlled to be 13% -18%, the backfill soil is layered, the thickness of each layer of virtual pavement is controlled to be within 250mm, the mechanical compaction is performed for not less than 3 times, and one compaction is performed for half compaction during the compaction. The rammers are connected, the rows are connected, and the rammers are vertically and horizontally staggered.

And (3) quality inspection of each layer of backfill soil, and sampling and measuring the dry density of the soil by adopting a ring cutting method. After the test result reaches the design requirement, the upper soil can be filled. Sampling every 20 m-50 m, wherein each layer is not less than one group, and the sampling part is arranged at the lower half part of each layer after being tamped.

When the pipe ditch is backfilled, the soil at the two sides of the pipe is filled and tamped manually, and the tamping machine can be used for tamping under the condition of not damaging the pipe.

(13) Concrete pouring for post-pouring strip of outer wall

After the casting age of the post-cast strip specified by the design is reached, checking and cleaning sundries in the post-cast strip, removing loose stones, soft concrete layers and slurry on the surface, and chiseling and washing cleanly. And (3) derusting the steel bars, binding in place after adjusting the spacing, closing the inner side template of the post-pouring strip, and oppositely pulling and fixing the advanced water stop die 1 and the inner side template 11 of the outer wall by utilizing the special-shaped water stop bolts 5 reserved before. The post-cast strip is poured by adopting compensating shrinkage concrete, the strength grade is improved by one step compared with that of adjacent concrete, and a proper amount of micro-expansive agent is added. And (3) vibrating the concrete at the post-pouring zone in layers, wherein each layer is not more than 400mm, and finely tamping the concrete to tightly combine the new concrete and the old concrete. Covering and moisturizing and curing are carried out within 12 hours after the post-pouring zone concrete pouring is finished, the concrete curing time is not less than 14 days, and a basement outer wall post-pouring zone advanced water stop structure diagram is shown in fig. 15.

According to the construction method of the basement outer wall post-pouring strip advanced water-stopping structure, the advanced water-stopping die 1 and the outer wall steel bars 13 are effectively tied, a stress buffering room is provided, after the outer wall concrete pouring is completed, the advanced water-stopping die 1 and the basement outer wall are connected into a whole, coiled material waterproof layers are effectively prevented from being pulled apart due to factors such as backfill settlement and structural shrinkage settlement, and therefore hidden quality hazards of underground waterproof engineering are eliminated. And the auxiliary material investment is less, a large amount of materials and manual investment are saved, the cost is reduced, the work efficiency is improved, the construction progress is quickened, a working face is provided for main engineering construction as soon as possible, the potential safety hazard of long-time exposure of a foundation pit is eliminated, and the method has good popularization value.

The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims

1. The utility model provides a basement outer wall post-cast strip advanced water stop structure which characterized in that includes:

the advanced water stop die is positioned at the outer side of the template of the basement outer wall post-pouring strip and is connected with the basement outer wall and the template of the basement outer wall post-pouring strip, and the advanced water stop die can seal a gap between the basement outer wall and the basement outer wall post-pouring strip;

the steel bar supports can tightly prop against the special-shaped water stop bolts on the two groups of steel plate water stop belts; the steel bar support comprises a steel bar sleeve and two support bars, wherein the two support bars are in threaded connection with the steel bar sleeve, one end, far away from the steel bar sleeve, of each support bar is provided with a U-shaped bar, the bottom end of each U-shaped bar is close to the corresponding steel bar sleeve, each steel bar water stop strip extends into an opening of each U-shaped bar, Y-shaped openings are formed in the side edges of the U-shaped bars, the plane where each Y-shaped opening is located is parallel to the corresponding steel bar water stop strip, and each Y-shaped opening is propped against each special-shaped water stop bolt.

2. The basement exterior wall post-cast strip advanced water stop construction according to claim 1, wherein: the advanced water stop die comprises a die frame and a die lining plate which are connected, wherein the die lining plate is arranged around the die frame, and the special-shaped water stop bolt penetrates through the die lining plate and is connected with the die frame.

3. The basement exterior wall post-cast strip advanced water stop construction according to claim 2, wherein: the die frame is made of steel profiles, the die frame is connected with an elongated nut, and the special-shaped water stop bolt is in threaded connection with the elongated nut.

4. The basement exterior wall post-cast strip advanced water stop construction according to claim 2, wherein: the cross section of the advanced water stop die is isosceles trapezoid, two die lining plates which are arranged in parallel are arranged parallel to the templates of the basement outer wall, and one die lining plate with larger width is arranged close to the basement outer wall post-pouring belt; the die lining plate is made of PPS plates.

5. The basement exterior wall post-cast strip advanced water stop construction according to claim 1, wherein: both ends of the steel plate water stop belt are provided with bending parts, and the bending parts are arranged towards the water facing surface.

6. The basement exterior wall post-cast strip advanced water stop construction according to claim 1, wherein: the steel bar support comprises vertical steel bars and transverse steel bars, the vertical steel bars are connected with the transverse steel bars, the number of the vertical steel bars is two, two parallel arrangement vertical steel bars are connected with the two ends of the transverse steel bars, the number of the transverse steel bars is multiple, and the transverse steel bars are arranged in parallel.

7. The basement exterior wall post-cast strip advanced water stop construction according to claim 1, wherein: the special-shaped water stop bolt comprises a screw rod, a water stop ring, a connecting nut and a mountain-shaped clamp, wherein the water stop ring, the connecting nut and the mountain-shaped clamp are sleeved on the screw rod, the water stop ring is connected with the steel plate water stop belt, the connecting nut can be abutted against a template of the basement outer wall post-pouring belt, and the connecting nut and the mountain-shaped clamp are respectively in threaded connection with the screw rod.

8. A construction method of a basement exterior wall post-cast strip advanced water stop structure according to any one of claims 1 to 7, characterized in that: installing the advanced water stop die, connecting the advanced water stop die with the basement outer wall and a template of the basement outer wall post-pouring strip, pouring basement outer wall concrete, paving a waterproof protection layer on the outer sides of the basement outer wall and the advanced water stop die, backfilling a foundation pit, and pouring basement outer wall post-pouring strip concrete.