CN211080603U

CN211080603U - Assembled concrete wall waterproof construction

Info

Publication number: CN211080603U
Application number: CN201920894528.6U
Authority: CN
Inventors: 薛庆文; 田泽辉; 吴思杉; 刘刚; 林裕
Original assignee: Chengdu Second Construction Engineering Co ltd Of Cdceg
Current assignee: Chengdu Second Construction Engineering Co ltd Of Cdceg
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-07-24
Anticipated expiration: 2029-06-14

Abstract

The patent of the utility model relates to an assembly type structure's is waterproof, concretely relates to assembly type concrete wall waterproof construction, including a plurality of prefabricated plates that splice into the wall body, the horizontal seam and the vertical seam crossing of prefabricated plate all are provided with the waterproof layer, and the waterproof layer includes from the seam inside to outside in proper order: the sealant isolation layer is formed by at least one flexible strip which is extruded by the inner wall of the joint, embedded in the joint and extended along the joint; sealing the adhesive layer; the transverse seam is of a reverse ridge structure; a waterproof layer is arranged between the first top end and the first bottom end; a cavity is reserved in the vertical joint and behind the sealant isolation layer, and a vertical drainage channel is formed in the cavity; a gap which gradually narrows from the outside to the inside is formed between the first bottom end and the first top end, and the first bottom end is obliquely arranged. The waterproof structure avoids subsequent frequent maintenance, saves a large amount of maintenance materials, reduces the generation of construction waste, and meets the requirements of economy, environmental protection and energy conservation of the existing assembly type building.

Description

Assembled concrete wall waterproof construction

Technical Field

The patent of the utility model relates to an assembly type structure's is waterproof, concretely relates to assembly type concrete wall body waterproof construction.

Background

The fabricated concrete building is still in the starting stage in China at present, but with the continuous development and the promotion of the development and planning of the national industry of thirteen-five, the fabricated concrete building can save a large amount of resources, is economic and environment-friendly, has the characteristics of meeting the requirements of green buildings and is also paid more attention, and a set of relatively mature fabricated concrete building main body structure construction system is gradually formed. However, there is an important part to achieve the functional integrity of the fabricated concrete building, namely, the exterior wall of the fabricated concrete building is waterproof.

In the existing fabricated concrete building main body structure, the peripheral retaining wall generally adopts connection modes such as cast-in-place node connection and sleeve grouting connection, wherein the prefabricated plates and the cast-in-place nodes are horizontally continuous to form vertical seams, the prefabricated plates are connected through the sleeve grouting to form horizontal seams, and a large number of splicing seams ensure that the outer wall of the building is waterproof and is not easy to ensure. Meanwhile, the difficulty in repairing the composite heat-insulating external wall panel greatly increases the difficulty in leakage treatment of the external wall of the fabricated concrete building, and the requirements of economy, energy conservation and environmental protection at present cannot be met. Therefore, the key of the waterproof structure of the outer wall of the fabricated concrete building is the sealing and waterproof structure of the splicing seam of the outer wall of the fabricated concrete building.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a consumptive material is few, economic environmental protection's assembled concrete wall waterproof construction, still provides an assembled concrete prefabricated outer wall waterproof construction method who carries out construction to this waterproof construction to expect to solve above-mentioned problem.

The application provides an assembled concrete wall waterproof construction, including a plurality of prefabricated plates of concatenation one-tenth wall body, the horizontal seam and the vertical seam crossing of prefabricated plate all are provided with the waterproof layer, and above-mentioned waterproof layer includes from the seam inside to outside in proper order:

the sealant isolation layer is formed by at least one flexible strip which is extruded by the inner wall of the joint, embedded in the joint and extended along the joint;

the sealing glue layer is arranged at the opening of the seam and used for plugging the seam;

the lower end of the prefabricated plate is of a stepped structure and comprises a first bottom end and a second bottom end higher than the first bottom end;

the upper end of the precast slab is of a stepped structure and comprises a first top end and a second top end higher than the first top end;

the first bottom end corresponds to the first top end, and the second bottom end corresponds to the second top end to form a reverse ridge structure;

the waterproof layer is arranged between the first top end and the first bottom end;

a cavity is reserved in the vertical joint seam and behind the sealant isolation layer, a vertical drainage channel is formed in the cavity, and the drainage channel is communicated with the transverse joint seam;

the drainage channel is of a linear structure, the top end of the precast slab is provided with a groove positioned on the extension line of the drainage channel, and the groove is communicated with the drainage channel;

a gap gradually narrowing from the outside to the inside is formed between the first bottom end and the first top end, and the first bottom end is obliquely arranged.

Set up foretell anti-bank structure in the seam of prefabricated plate from top to bottom, prevent that external rainwater from getting into indoorly, combine to set up foretell waterproof construction, make this waterproof construction have excellent waterproof performance like this, and adopt sealed gluey combination with flexible strip, can not break when making this waterproof construction place wall body take place deformation, let this waterproof construction have higher life and reliability, avoided the repeated maintenance in later stage, very accord with the economy of present fabricated building, the requirement of environmental protection.

The drainage channel and the groove are arranged, so that the waterproof structure has higher waterproof reliability, namely no matter water flows in from the upper part of the drainage channel or flows out from the wall, the groove can ensure that the water flows can smoothly and quickly enter the drainage channel, a gap which gradually narrows from outside to inside is formed between the first bottom end and the first top end, although the water can be blocked outside the seam by arranging the anti-threshold structure, if part of water does not enter the drainage channel, the water is accumulated in the seam, impurities and compounds in the water are gradually accumulated on the bottom surface of the seam after the water is evaporated in the past, the deposition of the impurities can enter the seam between the sealant and the liner, the adverse effect on the sealant can be chronically caused, even the blocking effect between the sealant and the liner is slowly ineffective and is difficult to detect, and the gap which gradually narrows from outside to inside is formed between the first bottom end and the first top end, first bottom slope sets up, not only can let the difficult deposit that prevents debris in getting into the gap of external rivers like this, also be for the convenience let flexible strip guarantee that it can the pressurized fixed filling in the in-process in gap, can not appear fixing unstable condition because of size deviation.

Further, the groove is located between the first top and the second top, so that when the high and low gaps for blocking the inflow of the external water flow block the water flow at the low gaps, the water flow directly enters the drainage channel through the groove.

Further, the groove is funnel-shaped.

Furthermore, the size of the bottom end of the funnel-shaped groove is larger than the size of the joint of the drainage channel and the groove, so that excessive water is prevented from remaining in the high-low seams when falling into the drainage channel from the upper part.

Further, the lower outlet of the drainage channel is positioned on the outer side of the prefabricated panel where the drainage pipe is positioned, so that water in the prefabricated panel can be conveniently guided out to the outer side.

Further, above-mentioned first bottom inclines 5 ~ 15 for the horizontal plane, and the inclination is too big, and is not very convenient when filling in above-mentioned flexible strip, and is comparatively suitable when first bottom inclines 5 ~ 15 for the horizontal plane.

Furthermore, a caulking layer is arranged between the second bottom end of the prefabricated slab positioned above and the second top end of the prefabricated slab positioned below, and the joint of the caulking layer sequentially comprises a grouting material layer and an elastic caulking layer filled with elastic caulking materials from inside to outside.

Further, the precast slab comprises an outer leaf plate, a heat insulation layer and a precast slab main body from outside to inside in sequence; or the precast slab comprises a precast slab main body and a heat insulation layer in sequence from outside to inside; above-mentioned heat preservation includes fire prevention rock wool layer and heat preservation sheet layer, and above-mentioned fire prevention rock wool layer is close to horizontal seam setting.

Further, in the width direction of the seam, the total width of the flexible strips inserted into the seam is greater than the seam width, and 2mm is less than the difference between the total width and the seam width and less than 5 mm.

Further, the aspect ratio of the sealant layer is (10:3) to (10:6), preferably 2: 1.

In order to achieve the purpose, the utility model adopts a construction method of a prefabricated concrete exterior wall waterproof structure, which comprises the steps of performing waterproof structure construction on vertical joints of prefabricated concrete plates and performing waterproof structure construction on transverse joints of the prefabricated concrete plates; the construction of the waterproof structure for the two seams comprises the following operations:

s1, cleaning and drying joints of precast concrete slabs;

s2, plugging the flexible closed-cell polyethylene foam round bar gasket into the joint;

s3, filling sealant into the joint at the temperature of 18-30 ℃ and under the environment with the relative humidity of 59% -69%;

the construction method comprises the following steps of constructing a vertical joint, filling sealant in a crossing position of the vertical joint and a transverse joint when the crossing position is constructed, and constructing the transverse joint; in the process of transverse joint construction, a flexible closed-cell polyethylene foam round bar liner is plugged into the lowest gap in a high-low joint reversed bank structure formed after butt joint of an upper precast concrete plate and a lower precast concrete plate.

Because the outer wall of the fabricated concrete building is waterproof and difficult to repair, and the cost is very high, new environmental problems can be caused by construction wastes brought by repair, and therefore, the construction quality of the outer wall waterproof sealant directly determines the construction environmental protection degree, the construction cost and the later maintenance cost.

The sealant is the optimal choice for filling the sealant at the joint under the environment with the temperature of 18-30 ℃ and the relative humidity of 59% -69%, and the adhesive property of the sealant can be reduced due to the fact that the surface wettability of the sealant is reduced and frost and ice can be formed on a low-temperature base material to influence the adhesive property of the sealant. On the building surface of too high ambient temperature and sunshine direct incidence, the actual temperature on substrate surface probably is very much higher than ambient temperature, receives the influence of high temperature, and the sag resistance of sealed glue can worsen, curing time can accelerate, live time and repair time can shorten, produces the bubble easily simultaneously (the sag resistance difference of sealed glue of different qualities is great). The curing speed of the sealant is slowed down due to too low relative humidity, a condensed water film can be formed on the surface of the base material due to too high relative humidity, the cohesiveness of the sealant and the base material is influenced, the sealant can also form bubbles, and the sealant is filled in the environment with the temperature and the humidity, so that the reliability of a waterproof structure is guaranteed, and the repeated repairing condition cannot occur.

The gasket is arranged to isolate the sealant from concrete on the inner side of the cavity, so that the sealant is prevented from being bonded on three sides, the bonding performance is influenced, namely, if the gasket is not arranged, the sealant on the inner side of the rubber joint can flow downwards due to self weight to form a phenomenon of being thin at the top and thick at the bottom, even the left side and the right side of the sealant are bonded with the main concrete, if a building is subjected to earthquake action, the sealant bonded on the three sides is very easy to crack by pulling, the gasket is arranged to play a role in controlling the construction depth of the waterproof sealant, the reliability of the sealant is guaranteed, and thus, the flexible closed-cell polyethylene foam round bar gasket and the filling sealant are arranged in the lowest gap in the high-low seam reversed bank structure of the prefabricated outer wall, so that the waterproof structure is very reliable, long in service life and has deformability. Compared with the waterproof structures of other fabricated buildings, the waterproof structure manufactured by the method has the advantages that the service life of the waterproof sealant of the outer wall is prolonged, the construction cost and the later maintenance cost are saved, the subsequent frequent repair situation is reduced, the generation of construction waste is reduced, the waterproof structure is economical and environment-friendly, the use of energy and consumables is saved, and the construction of the waterproof sealant of the outer wall of the fabricated concrete building is perfected and optimized.

Furthermore, before the sealant is filled in the seam, the base layer of the seam is cleaned and then the primer liquid is uniformly coated in the seam.

The waterproof sealant has good adhesion with a concrete substrate, and can be coated with primer liquid to deal with the complexity of a construction site. The stability of the surface of a porous substrate (such as a cement concrete PC board and an extrusion molding board) can be enhanced by brushing the base coating liquid, and the influence of dust on the adhesive property of the sealant is reduced; prevent the surface of the bonded body component (such as water and alkaline substance) from migrating to the sealant layer, thereby affecting the performance of the adhesive; the adhesive property of the precast concrete plate (PC plate) block is stabilized, and the residual PC plate release agent and the sealant are prevented from acting, so that the performance of the adhesive is influenced.

Further, the sealant is filled in the joint after the primer is coated for 5min, the construction time for filling the sealant is t, and t is less than 60 min. After the primer coating liquid is coated, if the sealant is filled too early and the construction time of the sealant is too long, the primer coating liquid cannot fully exert the using effect.

Further, a cavity is reserved behind the flexible closed-cell polyethylene foam round bar gasket, so that the cavity of the vertical joint forms a drainage channel; and a drain pipe with an outlet end inclined downwards is communicated with the drain channel. Compare in other drainage pipe that adopt independent setting, the utility model discloses a regard the cavity of vertical seam as drainage channel, make precast concrete board and drainage channel form integratively naturally, practice thrift the consumptive material, reduce the cost, pleasing to the eye, also reduced the outside occupation space of unnecessary.

Further, when the drain pipe is arranged, the flexible closed-cell polyethylene foam round bar gasket is obliquely arranged along the drain pipe at the position where the drain pipe is arranged and is fixed, glue is injected from top to bottom along the vertical joint, when the construction is carried out to 95-110 mm above the elevation of the drain pipe, after a layer of sealant with the thickness of 9-11 mm is filled on the obliquely arranged flexible closed-cell polyethylene foam round bar gasket, the drain pipe is arranged on the sealant, the drain pipe is downwards pressed until the drain pipe is stable, the periphery of the drain pipe is tightly wrapped by the sealant and is tightly connected with the sealant on the upper part and the lower part, and finally the redundant sealant is removed.

Further, the slope of the drain pipe is larger than 20 degrees, and the drainage efficiency is higher at the angle.

Further, the drain pipes are arranged on the vertical joint seam at intervals of 10-13 m. Therefore, a drainage section is formed every 10-13 m, and the phenomenon that water flows in the cavity for too long and is immersed in a room is avoided.

Further, when the sealing glue is filled in the butt joint, if the same glue joint is not constructed in the next time, a 35-55-degree oblique angle is trimmed towards the inner side of the glue joint at the joint part, and the next joint treatment is facilitated under the angle.

Further, after the flexible closed-cell polyethylene foam round bar liner is plugged into the seam, the pattern beautifying paper is adhered and compacted along the two side edges of the seam; and removing the masking paper after the sealant is filled in the joint. The effect of the beautiful line paper is mainly to control the width of the glue seam and ensure the attractive and tidy appearance of the wall seam.

Furthermore, when the flexible closed-cell polyethylene foam round bar gasket is plugged into the joint, at least two flexible closed-cell polyethylene foam round bar gaskets are bundled and then plugged into the joint, and the at least two flexible closed-cell polyethylene foam round bar gaskets are arranged in parallel.

Through setting up parallel flexible obturator polyethylene foam pole pad to the inboard structure of seam is confirmed when the sealed construction of guarantee is sealed, and inboard shaping is irregular when preventing sealed construction, weak position appears.

The liner cannot be twisted into a twist shape, when the width of the glue seam is too large, if the liner is filled into the glue seam by adopting a plurality of liners and twisted into the twist shape or the spiral shape, the inner side of the liner is irregularly formed during the construction of the sealant, and weak parts are easy to appear.

According to the width of the glue seam, a plurality of specifications of foam rods are selected as a liner, or a plurality of foam rods are bound side by side to be used as a liner, and flexible strips or foam rods are placed in parallel.

The present invention will be further described with reference to the accompanying drawings and the detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description. Or may be learned by practice of the invention.

Drawings

The accompanying drawings, which form a part of the disclosure, are included to assist in understanding the disclosure, and the description provided herein and the accompanying drawings, which are related thereto, are intended to explain the disclosure, but do not constitute an undue limitation on the disclosure.

In the drawings:

fig. 1 is a schematic view for explaining a waterproof structure of a fabricated concrete wall according to an embodiment;

FIG. 2 is a partially enlarged schematic view for explaining a point A in FIG. 1;

labeled as: 1-flexible closed-cell polyethylene foam round bar pad, 2-sealant layer, 301-first bottom end, 302-second bottom end, 401-first top end, 402-second top end, 5-grouting layer, 6-elastic caulking layer, 7-precast slab outer leaf plate, 8-heat insulation layer, 801-fireproof rock wool layer, 802-heat insulation plate layer, 9-precast slab main body, 10-drainage channel formed by vertical joint cavity and 11-drainage pipe.

Detailed Description

The present invention will be described more fully with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Before the present invention is described with reference to the accompanying drawings, it is to be noted that:

the technical solutions and features provided in the present invention in each part including the following description may be combined with each other without conflict.

Moreover, the embodiments of the invention described in the following description are generally only examples of a subset of the invention, and not all examples. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.

With respect to the terms and units of the present invention. The term "comprises" and any variations thereof in the description and claims of this invention and the related art are intended to cover non-exclusive inclusions.

Referring to fig. 1 and 2, in the present embodiment, for the exterior wall construction waterproof structure of the fabricated concrete building, the fabricated concrete wall waterproof structure is adopted in the present embodiment, and includes a plurality of prefabricated slabs spliced into a wall body, and waterproof layers are respectively disposed at the transverse joints and the vertical joints of the prefabricated slabs, and the waterproof layers sequentially include from inside to outside of the joints:

the sealant isolation layer is formed by at least one flexible strip which is extruded by the inner wall of the joint, embedded in the joint and arranged along the joint in an extending mode, the flexible strip adopts a flexible closed-cell polyethylene foam round bar, and the flexible strip is used as a flexible strip and adopts a flexible closed-cell polyethylene foam round bar liner 1 (hereinafter referred to as a liner);

the sealing adhesive layer 2 is arranged at the opening of the seam and used for plugging the seam;

the lower end of the prefabricated plate is of a stepped structure and comprises a first bottom end 301 and a second bottom end 302 higher than the first bottom end 301;

the upper end of the precast slab is of a step structure and comprises a first top end 401 and a second top end 402 higher than the first top end 401;

the first bottom end 301 corresponds to the first top end 401, and the second bottom end 302 corresponds to the second top end 402 to form an inverted ridge structure;

the waterproof layer is arranged between the first top end 401 and the first bottom end 301;

namely, the sealant is filled into the reserved glue seams between the precast slabs, and after curing, a waterproof layer with deformability is formed between the precast slabs. If the sealing glue isolation layer, namely the liner 1, is not arranged, the glue on the inner side of the glue seam flows downwards due to the dead weight to form the phenomenon of being thin at the top and thick at the bottom, even the left side and the right side and the rear side of the glue are bonded with the main concrete, and after the building is subjected to the action of earthquake force, the sealing glue layer 2 bonded on the three sides is very easy to crack.

A caulking layer is arranged between the second bottom end 302 of the prefabricated panel positioned above and the second top end 402 of the prefabricated panel positioned below, and the caulking layer joint sequentially comprises a grouting material layer 5 and an elastic caulking layer 6 filled by elastic caulking materials from inside to outside. The precast slab adopted in the embodiment sequentially comprises an outer leaf plate 7, a heat insulation layer 8 and a precast slab main body 9 from outside to inside; or, the precast slab comprises a precast slab main body 9 and a heat-insulating layer 8 in sequence from outside to inside; above-mentioned heat preservation 8 is close to horizontal seam setting including fire prevention rock wool layer 801 and heat preservation sheet layer 802 on the above-mentioned fire prevention rock wool layer 801. In the width direction of the seam, the total width of the pad 1 inserted into the seam is larger than the width of the seam, and 2mm is smaller than the difference between the total width and the width of the seam and smaller than 5 mm. The width-depth ratio of the sealant layer 2 is (10:3) to (10: 6).

The construction can be carried out according to the following steps:

firstly, preparation of construction

1. Preparing tools, such as a glue gun, a scraper, a textured paper, a hard brush, a soft brush, a concrete cutting machine, a polishing machine, an electric pick, a powerful blower, a mud knife, a hand hammer, a chisel, a plane knife and the like.

2. Preparing materials, namely reasonably selecting the type of the waterproof sealant of the outer wall and a matched primer according to the conditions of the type of the base layer material of the joint part, the influence of the surrounding environment, the seasonal air temperature, the structural deformation and displacement performance and the like; soft closed-cell circular polyethylene strips (polyethylene foam rods common in the market) of different size specifications were selected according to the difference of the seam width.

3. Personnel allocation, professional constructors with abundant experience are selected, and training and examination can be performed when necessary.

4. And (4) preparing the technology, and performing technical interaction on the operating personnel.

5. The template is firstly made before formal construction, and then large-area construction is carried out.

Second, checking the seam

Because the prefabricated concrete outer wall of the fabricated building has certain errors all the time in the hoisting process and the quality of the abutted seams has differences, all transverse seams, vertical seams, crossed seams and irregular seams need to be checked and confirmed before large-area construction, and the construction difficulty is solved in advance.

Thirdly, cleaning the construction surface

1. The outer edge of the seam is provided with hanging pulp

When the outer side of the joint part has floating pulp, the floating pulp is shoveled by a scraper, and then dust is cleaned by a soft brush, so that the outer side of the joint is smooth and clean.

2. The outer edge of the seam is broken

When the precast concrete component in hoist and mount in-process because of the arris that the collision leads to fall the angle, influence the outer wall waterproof sealing glue film 2 construction, should repair the damaged part perfect in advance, polish, maintenance, after acceptance passes, can carry out the construction of waterproof sealing glue film 2. When the damage is small, the waterproof sealant can be directly used for repairing.

3. Sundries in the seam

When the joints are filled with sundries such as residual foaming agent, steel bar joints, gaskets, battens and the like in the installation process of precast concrete components, tools such as electric picks, cutting machines and the like are used for cleaning the sundries, the construction depth of the foam caulking rods and the waterproof sealing adhesive layer 2 is ensured, and finally, dust and loose sundries in the joints are cleaned up by a powerful blower.

4. Irregular width of the seam

When the width of the splicing seam of the precast concrete member is inconsistent due to irregular installation, especially when the size of the joint is large, and the seam is too wide or too narrow, the glue seam is manually trimmed.

(1) When the width of the seam is larger than 20mm, the two foam rods are fixed side by using the adhesive tape and filled in the seam, and the foam plate cannot be twisted into a twist shape for use.

(2) When the seam width is less than 10mm, the width of the glue seam is trimmed to be at least 10mm by a cutting machine. And cleaning dust by using a soft brush after finishing the glue joint.

Fourth, insert the liner

The effect of liner 1 is mainly kept apart waterproof sealing glue film 2 and the inboard concrete of cavity, avoids waterproof sealing glue film 2 to form trilateral bonding, influences the adhesion performance, plays the effect of the 2 construction depth of control waterproof sealing glue film simultaneously.

The material of the pad 1 is preferably selected from soft closed-cell round polyethylene strips, namely flexible strips (polyethylene foam rods). The foam rods with the specification and the size about 2mm larger than the glue seams are generally selected, and a plurality of foam rods with different sizes are required to be prepared due to different sizes of the glue seams. After the base layer is cleaned up, the foam rod is embedded into the glue seam, a construction space of the waterproof sealing glue layer 2 is reserved, and the width-depth ratio of the sealing glue layer 2 is generally 2: 1. The material of the gasket 1 is not preferably a foaming agent. When a plurality of gaskets 1 are required to be plugged in, the flexible strips with multiple specifications are selected as the gaskets 1 according to the width of the glue seams, or a plurality of gaskets are plugged in a side-by-side binding mode.

Five, paste beautiful line paper

The effect of the beautiful line paper is mainly to control the width of the glue seam and ensure the attractive and tidy appearance of the wall seam. The beautiful line paper is generally made of materials which are easy to stick and tear, the beautiful line paper is stuck and compacted along the two sides of the glue seam, and the beautiful line paper is not easy to break when the beautiful line paper is stuck so as to avoid influencing the beautiful appearance of the glue seam. When the cross seam is stuck, the beautiful pattern paper can be properly broken or bent.

Before the masking paper is pasted, a soft brush is used for cleaning dust at the pasting position so as to avoid infirm pasting. The masking paper is only used in the operation within the construction range of the day, whether glue can be applied in wet weather or not can be determined by taking whether the masking paper can be firmly adhered to the outer surface of the prefabricated plate or not as a reference.

When an operator forgets to stick the masking paper, if the outer surface of the prefabricated slab is a decorative surface, redundant colloid is removed by shoveling, but the decorative surface layer cannot be damaged; if a subsequent decorative surface layer is arranged on the outer surface of the prefabricated slab, the construction is carried out after coating the surface of the cured sealant with a bonding promoter (PR106) before the construction of the decorative surface layer, so that the good coating effect is ensured, and the falling of the decorative surface layer is avoided.

Sixthly, brushing bottom coating

Waterproof sealants generally have good adhesion to cementitious substrates, but take into account the complexity of the construction site. In order to better guarantee the performance of the waterproof sealant, a joint base layer is carefully cleaned before the sealant is constructed, and a primer is uniformly brushed in a glue joint by using a hard brush, wherein the primer is a special matched product of the waterproof sealant.

The primer solution has the main functions:

1. the stability of the surface of a porous substrate (such as a cement concrete PC board and an extrusion molding board) is enhanced, and the influence of dust on the bonding performance of the sealant is reduced.

2. Prevents the surface of the adherend component (e.g., water, alkaline substance) from migrating to the sealant layer 2, thereby affecting the adhesive performance.

3. The adhesive property of the precast concrete plate (PC plate) block is stabilized, and the residual PC plate release agent and the sealant are prevented from acting, so that the performance of the adhesive is influenced.

Seven, filling and sealing glue

The sealant is constructed on a dry substrate in a clean environment with the temperature of 18-30 ℃ and the relative humidity of 59-69%, preferably the temperature of 24-26 ℃ and the relative humidity of 63-65%. Too low an ambient temperature can reduce the adhesion of the sealant because the surface wettability of the sealant is reduced and frost and ice can form on the cold substrate, affecting the adhesion of the sealant. On the building surface of too high ambient temperature and direct sunlight, the actual temperature on substrate surface may be very much higher than ambient temperature, receives the influence of high temperature, and the sag resistance of sealed glue can worsen, curing time can accelerate, live time and finishing time can shorten, produce the bubble easily simultaneously. Too low a relative humidity will slow down the curing speed of the sealant, and too high a relative humidity may form a condensed water film on the surface of the substrate, affecting the adhesion of the sealant to the substrate, and possibly also causing the sealant to form bubbles. The sealant is constructed within 60 minutes after the primer coating liquid is coated for 5 minutes, otherwise, the use effect of the primer coating liquid is influenced.

The bottom coating liquid is not dried and then is subjected to gluing construction or the construction gap between the bottom coating liquid and the sealant is too long, so that the effective service time of the bottom coating liquid is prolonged; or when the primer liquid is covered by dirt or dust, the unqualified sealant is removed by using a proper tool, the inner wall of the joint is cleaned by using a grinding wheel machine until the concrete base surface is exposed, the dust in the joint is cleaned by using a soft brush or a powerful blower, and finally, glue is applied again strictly according to the regulations.

1. When glue is injected into the horizontal joint, construction can be carried out from any end part to the other end along the glue joint;

2. when glue is injected into the vertical seam, construction is carried out along the glue seam from top to bottom;

3. when the cross joint is injected with glue, construction is performed downwards along a vertical joint, and then construction is performed towards two sides from the cross position;

4. if the same glue seam is not constructed in the next time, a shovel knife is used for trimming a 45-degree oblique angle to the inner side of the glue seam at the joint part, so that the next seam treatment is facilitated.

Eighthly, mounting a drain pipe

A cavity is reserved in the vertical joint and behind the sealant isolation layer, a vertical drainage channel 10 is formed in the cavity, and the drainage channel 10 is communicated with the transverse joint; the drainage channel 10 is a straight line structure, the top end of the prefabricated plate is provided with a groove positioned on the extension line of the drainage channel 10, and the groove is communicated with the drainage channel 10; the groove is located between the first top and the second top to conveniently block the high and low seams into which the outside water flows and block the water flow at the low seams, and the water flow directly enters the drainage channel 10 through the groove. The groove is funnel-shaped. The size of the bottom end of the funnel-shaped groove is larger than the size of the joint of the drainage channel 10 and the groove, so that excessive water is prevented from remaining in the high and low seams when the excessive water falls into the drainage channel 10 from the upper side. The outlet at the lower end of the drainage channel 10 is positioned on the outer side of the prefabricated panel where the drainage channel is positioned, so that water in the prefabricated panel can be conveniently guided out to the outer side. Above-mentioned first bottom 301 inclines 5 ~ 15 for the horizontal plane, and the inclination is too big, and is not very convenient when filling in above-mentioned liner 1, and is comparatively suitable when first bottom 301 inclines 5 ~ 15 for the horizontal plane.

When the drainage design of a cavity of a construction fabricated concrete structure is carried out, one drainage pipe 11 is arranged at the bottom of each vertical joint, one drainage pipe is arranged at intervals of 12m along each vertical joint, the horizontal distance is not more than 9m, and the specific distance can be determined by a design unit.

The material selection is as follows: the drain pipe 11 must be made of flexible material compatible with waterproof sealant, and is preferably provided with an insect-proof and rain-proof backflow device.

The installation mode is as follows: when the vertical seam foam rod liner 1 is installed, a foam rod (with a high inside and a low outside and a gradient larger than 20 degrees) is obliquely installed at the position of the drain pipe 11 and fixed, masking paper is pasted, bottom coating liquid is brushed, glue is injected from top to bottom along the glue seam, when the elevation of the drain pipe 11 is 100mm above, the drain pipe 11 is installed on the specified liner 1, the periphery of the drain pipe 11 is tightly wrapped by sealant and is tightly connected with the sealant at the upper part and the lower part, and the redundant sealant is removed by a scraper.

Nine, tear off the beautiful line paper

After the glue seam is trimmed and leveled, the glue seam is slowly torn off from one end of the masking paper, and the corners of the sealing glue are not damaged.

Ten and later maintenance

After the glue is applied, the surface of the sealant is not deeply cured, so that the sealant cannot be pressed within 48 hours, cannot be disturbed and constructed within 28 days, and is kept still to ensure the service life of the sealant. If sundries are contained in the sealant and the sealant is separated from a wall body, the unqualified sealant is removed by using a proper tool, all residues in and around the joint are cleaned by using a grinding wheel machine until a concrete base surface is exposed, dust in the joint is cleaned by using a soft brush or a powerful blower, and finally, glue is applied again strictly according to the regulations.

The temperature and humidity contrast test is set for filling the joint of the sealant, the sealant is placed in a temperature and humidity control box, two concrete plates are arranged, a gap is arranged between the two concrete plates, the sealant is filled in the gap for 28 days, then the two ends of the cured sealant are stretched, and the cohesiveness of the sealant under different temperatures and humidity is tested (the test is a gradual stretching process for stretching a sealant layer with the thickness of 1cm, whether a crack appears between the sealant and the concrete plates is observed from short to long through the stretching length, and the test is sequentially poor-medium-good-excellent).

Serial number	Temperature (. degree.C.)	Relative humidity	Adhesion Property
					1	10	50％	In
2	12	51％	In
				3	14	53％	In
4	16	55％	In
				5	18	57％	Good wine
6	20	59％	Good wine
				7	22	61％	Good wine
8	24	63％	Superior food
				9	26	65％	Superior food
10	28	67％	Good wine
				11	30	69％	Good wine
12	32	71％	Good wine
				13	34	73％	In

Therefore, sealant is filled in the seam in a clean environment with the temperature of 18-30 ℃ and the relative humidity of 59-69%, the optimal scheme is that the temperature is 24-26 ℃ and the relative humidity is 63-65%.

The construction economic benefit is analyzed for a standard floor of a certain fabricated concrete residential building.

The first scheme is as follows: the construction method is adopted to carry out waterproof structure construction;

scheme II: and (3) adopting a traditional method (adopting cast-in-place node connection and sleeve grouting connection) to carry out waterproof structure construction.

Economic benefit statistical table (Unit: Yuan)

From the analysis of the table above, under the condition of ensuring excellent product quality, the first scheme is far greater than the second scheme no matter the instant economic benefit or the long-term economic benefit and the energy-saving consumption are realized. Compared with the scheme I that waterproof sealant construction is carried out by adopting the method and the scheme II that waterproof sealant construction is carried out by adopting a traditional method, rework cost hardly exists. In a detection maintenance period, the scheme does not need maintenance, the maintenance work amount of the scheme II is completely determined by the operation level of constructors and cannot be actively controlled, and hanging baskets need to be erected during maintenance, old glue is cut, and a decorative surface layer is damaged, so the maintenance cost is very high. Therefore, when the construction method is adopted for construction, the reliability and the economy of the water resistance of the outer wall of the building are effectively guaranteed, and the benefit is more practical and obvious as time goes on.

The construction method can prolong the service life of the sealant and reduce the maintenance times, thereby reducing the influence on the surrounding human environment and having good social reverberation. The waterproof structure built by the construction method has reliable quality of waterproof sealant, and the later stage is not easy to leak water. Meanwhile, the maintenance cost is reduced, and the manpower, material resources and financial resources are saved.

The construction method and the waterproof structure are applied to a certain guaranteed housing construction project, the construction method and the waterproof structure can greatly improve the waterproof construction quality of the outer wall of the fabricated concrete building, the reliability of the waterproof structure is guaranteed, the construction method is low in maintenance frequency and environment-friendly, a large amount of consumables are saved, a large amount of energy consumption is reduced, and great economic benefits are realized.

The contents of the present invention have been explained above. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Based on the above-mentioned contents of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. Assembled concrete wall waterproof construction, including a plurality of prefabricated plates that splice into the wall body, the horizontal seam and the vertical seam crossing of prefabricated plate all are provided with the waterproof layer, its characterized in that, the waterproof layer includes from the seam inside to outside in proper order:

a cavity is reserved in the vertical joint and behind the sealant isolation layer, a vertical drainage channel is formed in the cavity, and the drainage channel is communicated with the transverse joint;

a gap gradually narrowing from outside to inside is formed between the first bottom end and the first top end, and the first bottom end is obliquely arranged.

2. The fabricated concrete wall flashing structure of claim 1, wherein the groove is located between the first top portion and the second top portion.

3. The fabricated concrete wall flashing structure of claim 1, wherein the channel is funnel-shaped.

4. A fabricated concrete wall waterproofing structure according to claim 3, wherein the size of the bottom end of said groove of the funnel type is larger than the size of the place where the drainage passage and the groove are connected.

5. The fabricated concrete wall waterproofing structure according to claim 1, wherein the lower outlet of the drainage passage is located on the outer side of the precast slab on which the drainage passage is located.

6. The fabricated concrete wall waterproofing structure according to claim 1 wherein the first bottom end is inclined 5 to 15 ° with respect to the horizontal plane.

7. The fabricated concrete wall waterproof structure of claim 1, wherein a caulking layer is provided between the second bottom end of the upper prefabricated panel and the second top end of the lower prefabricated panel, and the caulking layer comprises a grouting layer and an elastic caulking layer filled with an elastic caulking material in sequence from inside to outside.

8. The fabricated concrete wall waterproof structure of claim 1, wherein the precast slab comprises an outer leaf slab, an insulating layer and a precast slab main body in sequence from outside to inside; or the precast slab sequentially comprises a precast slab main body and a heat insulation layer from outside to inside; the heat preservation includes fire prevention rock wool layer and heat preservation sheet layer, fire prevention rock wool layer is close to horizontal seam setting.

9. The fabricated concrete wall waterproofing structure according to claim 1 wherein the total width of said flexible strips inserted into the joints in the width direction of the joints is > joint width, and 2mm < the difference between said total width and joint width is < 5 mm.

10. The fabricated concrete wall waterproof structure according to claim 1, wherein the width-to-depth ratio of the sealant layer is (10:3) - (10: 6).