CN113186985A

CN113186985A - Anti-seepage treatment method for basement bottom plate construction joint

Info

Publication number: CN113186985A
Application number: CN202110452872.1A
Authority: CN
Inventors: 陈辉; 钟录平; 李盛; 严冰
Original assignee: Shanghai Baoye Group Nanjing Construction Co Ltd
Current assignee: Shanghai Baoye Group Nanjing Construction Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-07-30
Anticipated expiration: 2041-04-26
Also published as: CN113186985B

Abstract

The application relates to an anti-seepage treatment method for a basement bottom plate construction joint, and belongs to the technical field of constructional engineering. In order to solve the problems that the water seepage is easy to occur to the bottom plate of the basement of the building due to construction joints, but the construction joints or the construction cold joints of water stop steel plates cannot be arranged due to the limitation of construction conditions are not arranged or limited, the conventional method is to treat the surface by simply cleaning and coating cement paste, and the problems of internal water seepage, single waterproof measure and poor construction effect are solved by a pressure grouting mode. According to the processing method provided by the application, the filler is arranged at the boundary of the concrete area poured firstly to form the step-shaped groove to play a role similar to a water stop steel plate; arranging a pressure grouting pipe between the groove and the surface layer of the bottom plate for grouting and waterproofing; waterproof coating tape setting and surface layer seepage water centralized collection and drainage measures are carried out on the surface layer of the construction joint, and multidirectional seepage prevention treatment can be carried out on the construction joint from the inside to the outside. The method is simple to operate, and the hidden danger of water seepage at the construction joint of the basement bottom plate is eliminated.

Description

Anti-seepage treatment method for basement bottom plate construction joint

Technical Field

The application belongs to the technical field of constructional engineering, and particularly relates to an anti-seepage treatment method for a basement bottom plate construction joint.

Background

The construction joint refers to a joint formed between the concrete poured before and after the concrete is poured in sections due to design requirements or construction requirements in the concrete pouring process. The construction joint is not a real existing joint, and only because the initial setting time of the first poured concrete is longer than the initial setting time or the type of the first poured concrete is different from that of the later poured concrete, a joint surface exists between the first poured concrete and the later poured concrete, and the joint surface is called as the construction joint.

According to relevant regulations of basement construction of buildings in China, construction joints are not allowed to be left in the construction of basement floors, and corresponding measures must be taken during construction to ensure that concrete of the basement floors of the buildings is continuously poured. However, in actual construction, due to construction power failure, failure of a concrete delivery pump and the like, a construction joint occurs because continuous casting cannot be performed during concrete casting. And the horizontal member and the vertical member in the basement can not be poured at one time due to the construction requirements of the basement of some buildings. Therefore, construction joints inevitably occur when the basement bottom plate is actually constructed.

The basement of the building is affected by self reasons and external environment, and the basement terrace is easy to damp due to the existence of the bottom plate construction joint, so that the water seepage condition is caused. The seepage problem is handled to construction joint present tradition adoption stagnant water steel sheet, increases behind the stagnant water steel sheet, meets during the gap infiltration of stagnant water steel sheet and can't ooze inwards again when water connects the gap at stubble position along new and old concrete, and the stagnant water steel sheet has played the effect of cutting off water infiltration route. Meanwhile, when water permeates along the gap between the water stop steel plate and the concrete, the water stop steel plate has a certain length, so that the permeation path of the water is also prolonged, and the waterproof effect can be achieved. However, for a construction joint or a construction cold joint in which a water-stop steel plate cannot be set due to the limitation of construction conditions or not, the conventional method is to simply clean the leakage surface and coat cement paste for treatment, and the method cannot fundamentally solve the problem of internal water seepage.

Application number in the prior art: CN201811487810.9 a foundation slab antiseep construction method, building construction platform carry out inside antiseep processing through the method of pressure slip casting, and it also can not effectively be multi-azimuth protection in essence, need repeatedly carry out slip casting waterproof processing again according to the seepage condition. Application No.: CN201721574296.3 a basement bottom board infiltration processing apparatus, its essence is also to carry out the slip casting water repellent treatment to the cracked crackle of basement bottom board, also can not carry out complete effective protection.

Disclosure of Invention

To the problems and the defects in the prior art, the application provides the anti-seepage treatment method for the basement bottom plate construction joint, and the step-shaped groove is formed by arranging the filler on the boundary of the concrete pouring area to play a role similar to a water stop steel plate; arranging a pressure grouting pipe between the groove and the surface layer of the bottom plate for grouting and waterproofing; waterproof coating tape setting and surface layer seepage water centralized collection and drainage measures are carried out on the surface layer of the construction joint, and multidirectional seepage prevention treatment can be carried out on the construction joint from the inside to the outside. The method is simple to operate, and the hidden danger of water seepage at the construction joint of the basement bottom plate is eliminated.

In order to achieve the technical effect, the following technical scheme is adopted in the application:

the utility model provides a antiseep processing method for basement bottom plate construction joint, divide into earlier concreting area and later concreting area according to basement bottom plate concreting's precedence order, and the crossing region of both is the construction joint, carries out antiseep to the construction joint after handling, carries out superstructure terrace construction to the basement bottom plate again, carries out antiseep to the construction joint and handles including following step:

s1, before a concrete pouring process of a concrete pouring area, a non-dismantling template net is paved on a template boundary of the concrete pouring area in advance; embedding fillers between the non-dismantling template net and the bottom layer and the surface layer of the steel bars in the thickness direction, wherein the non-dismantling template net forms a step shape above and below the fillers;

s2, carrying out a concrete pouring procedure on the concrete pouring area; after the concrete is solidified, cleaning the boundary of the area where the concrete is poured firstly until the non-dismantling template net laid in advance in S1 is cleaned; simultaneously taking out the pre-buried filler; firstly, pouring the boundary of a concrete area to form a step-shaped groove; the non-dismantling formwork mesh is arranged at the boundary so that when concrete is poured behind the formwork, the leftover pieces on the mesh are embedded in the concrete to form a mechanical wedge connected with the adjacent pouring blocks. The process steps of punching, napping and the like can be omitted during subsequent pouring, the construction period can be shortened, and the strength of the poured body is increased. The step-shaped groove is formed after pouring is finished so as to play a role of a water stop steel plate, and a water stop strip is adhered to the bottom of the groove so as to play a role of blocking water from permeating along a construction joint; the upper step and the lower step of the step-shaped structure have certain length, which is equivalent to the length of the water stop steel plate, can prolong the permeation path of water and can play a certain waterproof role.

S3, sticking a water-swelling water stop strip to the bottom of the step-shaped groove formed in the step S2; the water-swelling water stop strip is arranged to make use of the characteristic that the water stop strip swells when meeting water, so that the gap of the construction joint is completely sealed after the water stop strip swells to play a role in stopping water.

S4, installing pressure grouting pipes at intervals along the direction of the construction joint on the upper side of the boundary of the first concrete pouring area;

s5, carrying out a concrete pouring process on the post-poured concrete area, wherein a micro-expanding agent needs to be added into the poured concrete; firstly, pouring a concrete area and then pouring an intersection area of the concrete area to form a substantial construction joint; the micro-expansive concrete is poured in the post-pouring concrete area, so that the impermeability of the post-pouring concrete area is improved, water permeates along the construction joint, and the permeation of water from the pouring area is reduced.

S6, carrying out a base layer cleaning process on the construction joint position formed in the step S5, and smearing permeable crystallization type waterproof paint on the surface of the structural layer along the construction joint position;

s7, carrying out leakage inspection on the construction joints of the bottom plate, and if leakage exists at the construction joints, carrying out pressure grouting treatment through pressure grouting pipes pre-buried in S4;

s8, installing a closed drain pipe on the bottom plate construction joint along the construction joint direction; all the drainage pipes are communicated with the trench, and seepage water can be guided into the trench to be drained if the later construction joints leak;

and S9, after the construction joints of the bottom plate are checked to be free of leakage, carrying out upper-layer building terrace construction.

Specifically, when the boundary of the concrete casting area is cleaned in step S2, the concrete which is not well adhered to the net of the non-removable form is mainly cleaned, and after the filler is taken out, the bottom of the stepped groove is roughened, and the impurities generated during roughening are cleaned. The operation is to chisel the bottom of the groove before the water-swelling water stop is pasted, so that the pasting effect is improved.

Specifically, when the procedure of sticking the water-swelling water stop strip in the step S3, the water-swelling water stop strip is firmly stuck along the bottom direction of the groove by using a rolling tool, and a cement steel nail is additionally nailed along the bottom direction of the groove at a certain distance to assist in fixing. The arrangement is to effectively improve the fixing effect of the water stop strip.

Specifically, when the pressure grouting pipe is installed in S4, the pressure grouting pipe is a hollow structure with an open upper portion and a closed bottom, and is provided with a plurality of guniting through holes along an outer pipe wall; the installation depth of the pressure grouting pipe is at least greater than the depth of the upper step of the step-shaped groove. The arrangement is that a pressure grouting plugging layer is formed between the groove and the surface layer of the bottom plate of the construction joint, and a further waterproof effect is achieved.

Specifically, when the concrete pouring process is performed in the concrete pouring area after S5, before the concrete is poured, the release paper of the water-swellable seal in S3 needs to be removed; adding a micro-expanding agent into the poured concrete according to the addition amount of 8-10%; and after the pouring is finished, vibrating the concrete to ensure that the vibration is compact.

Specifically, when the waterproof paint is applied in S6, the waterproof paint is applied at equal intervals along both sides of the construction joint with the construction joint as the center, thereby forming a waterproof paint tape. The waterproof coating tape is arranged in order to take waterproof measures for the surface layer construction joints of the bottom plate.

Specifically, when the drain pipe is installed in S8, grooves are formed in both sides of the waterproof coating tape along the construction joint direction; the water discharge pipe is of a semicircular structure, and the semicircular two ends of the water discharge pipe are respectively arranged in the slotted openings at the two sides of the waterproof coating tape. The arrangement is that the seepage water on the surface layer of the bottom plate is collected in a centralized way and drained to a trench for discharge.

Compared with the prior art, the beneficial effect of this application lies in:

this application sets up the filler through earlier concreting border and forms step form recess, plays the effect of stagnant water steel sheet, can effectively stop the inside especially bottom of construction joint to the effectual infiltration between the recess. On the basis, a pressure grouting pipe is arranged between the surface layer of the bottom plate and the groove to perform a pressure grouting process, so that effective waterproof treatment can be effectively performed on the construction joint at the section. On the basis, the treatment of arranging the waterproof coating tape, installing the drain pipe and draining to the trench for discharging is carried out on the construction joint on the surface layer of the bottom plate, so that the waterproof treatment can be effectively carried out on the construction joint on the surface layer. This application carries out diversified water-proof measurements through the analysis to the construction joint infiltration principle, can effectually eliminate the infiltration hidden danger of basement bottom plate construction joint department.

Drawings

FIG. 1 is a schematic view of anti-seepage treatment of a construction joint of a basement floor according to an embodiment;

FIG. 2 is a cross-sectional view of an embodiment of anti-seepage treatment for a basement floor construction joint;

fig. 3 is a construction flow chart of an anti-leakage treatment method for a basement floor construction joint according to an embodiment.

In the figure: 1. firstly, pouring a concrete area; 2. then pouring a concrete area; 3. a cushion layer; 4. wood block; 4a, dense steel wire meshes; 5. reinforcing steel bars; 6. constructing a joint; 7. a water-swelling sealing strip when meeting water; 8. a waterproof paint tape; 9. a drain pipe; 10. grooving; 11. building a terrace; 12. a pressure grouting pipe; 13. and (4) digging a trench.

Detailed Description

In order that the objects and advantages of the present application will become more apparent, the present application will be described in detail with reference to the following examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the application and does not strictly limit the scope of the claims which specifically recite this application. In the embodiment, the basement bottom plate lower-layer cushion layer 3 is constructed, the flitch 4 is selected as a filler in the anti-leakage treatment construction, and the dense steel wire mesh 4a is selected as a disassembly-free template mesh.

Referring to fig. 1-3, the application provides an anti-leakage treatment method for a basement floor construction joint, which is divided into a first concrete pouring area 1 and a second concrete pouring area 2 according to the sequence of concrete pouring of the basement floor, wherein the crossed area of the first concrete pouring area and the second concrete pouring area is a construction joint 6, after the anti-leakage treatment is carried out on the construction joint 6, the basement floor is constructed on an upper building terrace 11, and the anti-leakage treatment of the construction joint 6 comprises the following steps:

s1, before the concrete pouring process of the first concrete pouring area 1, paving dense steel wire meshes 4a on the template boundary of the first concrete pouring area 1 in advance; the dense steel wire mesh 4a is embedded with the battens 4 in the thickness direction, namely between the bottom layer and the surface layer steel bars 5, and the dense steel wire mesh 4a forms a step shape above and below the battens 4;

s2, carrying out a concrete pouring procedure on the concrete pouring area 1; after the concrete is solidified, cleaning the boundary of the concrete pouring area 1 until the dense steel wire meshes 4a which are paved in advance in S1 are cleaned; simultaneously taking out the pre-buried battens 4; firstly, pouring the boundary of a concrete area 1 to form a step-shaped groove;

s3, sticking a water-swelling water stop bar 7 to the bottom of the step-shaped groove formed in the step S2;

s4, installing pressure grouting pipes 12 at intervals along the direction of the construction joint 6 on the upper side of the boundary of the first concrete pouring area 1;

s5, performing a concrete pouring process on the post-poured concrete area 2, wherein a small amount of expanding agent needs to be added into the poured concrete; firstly, pouring a concrete area 1 and then pouring a concrete area 2 to form a virtual construction joint 6;

s6, performing a base layer cleaning process on the position of the construction joint 6 formed in the step S5, and smearing a permeable crystallization type waterproof coating on the surface of the structural layer along the position of the construction joint;

s7, carrying out leakage inspection on the construction joint 6 of the bottom plate, and if the construction joint is inspected to have leakage, carrying out pressure grouting treatment through the pressure grouting pipe 12 pre-buried in S4;

s8, installing a closed drain pipe 9 on the bottom plate construction joint 6 along the construction joint direction; all the drainage pipes 9 are communicated with the trench 13, and seepage water can be guided into the trench 13 to be drained if the later construction joints 6 leak; see fig. 2.

And S9, after the bottom plate construction joint 6 is checked to be free of leakage, constructing the upper building terrace 11. See section b6 in fig. 3.

Further, when the boundary of the concrete pouring area 1 is cleaned in step S2, the concrete which is not well adhered to the dense steel wire mesh 4a is mainly cleaned, and after the flitch 4 is taken out, a chiseling process is required to be performed on the bottom of the stepped groove, and impurities generated during chiseling are cleaned. See section b1-b2 in FIG. 3.

Furthermore, when the procedure of adhering the water-swelling water stop bar 7 in S3 is performed, the water-swelling water stop bar 7 is firmly adhered along the bottom direction of the groove by using a rolling tool, and a cement steel nail is additionally nailed at a certain distance in the bottom direction of the groove to assist in fixing.

Further, when the pressure grouting pipe 12 is installed in S4, the pressure grouting pipe 12 is a hollow structure with an open upper portion and a closed bottom, and is provided with a plurality of guniting through holes along an outer pipe wall; the installation depth of the pressure grouting pipe 12 is at least greater than the depth of the upper step of the stepped groove. See section b2 in fig. 3.

Further, when the concrete pouring process is performed in the concrete pouring area 2 after S5, before the concrete is poured, the release paper of the water-swellable seal 7 in S3 needs to be removed; adding a micro-expanding agent into the poured concrete according to the addition amount of 8-10%; and after the pouring is finished, vibrating the concrete to ensure that the vibration is compact. See section b3 in fig. 3.

Further, when the waterproof paint is applied in S6, the waterproof paint is applied at equal intervals along both sides of the construction joint 6 with the construction joint 6 as the center, thereby forming a waterproof paint tape 8. See section b4 in fig. 3.

Further, when the drain pipe 9 is installed in S8, grooves are formed in the direction of the construction joint 6 on both sides of the waterproof coating tape 8; the water discharge pipe 9 is of a semicircular structure, and two semicircular ends of the water discharge pipe are respectively installed in the grooving openings 10 at two sides of the waterproof coating tape 9. See section b5 in fig. 3.

The working principle is as follows: through the antiseep processing method for basement bottom plate construction joint that this application provided, groundwater begins from lower floor's bed course and follows construction joint 6 when upwards permeating, when permeating to step form recess, the lower step and the upper step of recess have certain length, have prolonged the infiltration route, and reducible water continues upwards to permeate. Meanwhile, the water-swelling water stop strip 7 at the bottom of the groove plays a main water stopping role. If water can continue to permeate upwards along the construction joint 6 through the groove, a grouting anti-seepage layer for performing a pressure grouting process through the pressure grouting pipe 12 can be encountered, and the layer can further reduce the continuous upward permeation of water. Even if water can continuously permeate to the surface layer of the bottom plate, the water-proof coating strip 8 can be met, and finally the water seepage formed in the water discharge pipe 9 can be drained to a trench to be discharged, so that the seepage cannot be caused to the upper building terrace 11. The water seepage problem of the basement of the building is effectively guaranteed. The method is simple to operate and has a high-efficiency waterproof effect.

The embodiments of the present application have been described in detail with reference to the examples, but the present application is not limited to the embodiments, and those skilled in the art can make various equivalent changes and substitutions without departing from the principle of the present application after learning the content of the present application, and these equivalent changes and substitutions should be considered as belonging to the protection scope of the present application.

Claims

1. The utility model provides an antiseep processing method for basement bottom plate construction joint, divide into earlier concreting area and back concreting area according to basement bottom plate concreting's precedence order, and the crossing region between them is the construction joint promptly, right the construction joint carries out antiseep and handles the back, carries out superstructure terrace construction, its characterized in that to the basement bottom plate again: the anti-leakage treatment of the construction joint comprises the following steps:

s1, before a concrete pouring process of a concrete pouring area, laying a non-dismantling template net on a template boundary of the concrete pouring area in advance; the disassembly-free template net is pre-embedded with fillers in the thickness direction, namely between the bottom layer and the surface layer of reinforcing steel bars, and the disassembly-free template net forms a step shape above and below the fillers;

s2, performing a concrete pouring procedure on the concrete pouring area; after the concrete is solidified, cleaning the boundary of the concrete pouring area until the non-dismantling template net laid in advance in S1 is cleaned; simultaneously taking out the pre-buried filler; a step-shaped groove is formed at the boundary of the concrete pouring area;

s3, sticking a water-swelling water stop strip to the bottom of the step-shaped groove formed in the step S2;

s5, carrying out a concrete pouring process on the post-poured concrete area, wherein a micro-expanding agent needs to be added into the poured concrete; the intersection area of the first concrete pouring area and the second concrete pouring area forms the substantial construction joint;

s6, performing a base layer cleaning process on the construction joint position formed in the S5, and smearing a permeable crystallization type waterproof coating on the surface of the structural layer along the construction joint position;

2. The anti-seepage treatment method for the basement floor construction joint as claimed in claim 1, wherein the anti-seepage treatment method comprises the following steps: when the boundary of the cast-in-place concrete area is cleaned in the step S2, the concrete which is not well adhered to the net of the non-dismantling formwork is mainly cleaned, and after the filler is taken out, the bottom of the stepped groove needs to be roughened, and impurities generated during roughening are cleaned.

3. The anti-seepage treatment method for the basement floor construction joint as claimed in claim 1, wherein the anti-seepage treatment method comprises the following steps: when the procedure of sticking the water-swelling water stop strip in the S3 is performed, the water-swelling water stop strip is firmly stuck along the bottom direction of the groove by using a rolling tool, and a cement steel nail is additionally nailed along the bottom direction of the groove at a certain distance for auxiliary fixation.

4. The anti-seepage treatment method for the basement floor construction joint as claimed in claim 1, wherein the anti-seepage treatment method comprises the following steps: when the pressure grouting pipe is installed in the S4, the pressure grouting pipe is a hollow structure with an opening at the upper part and a closed bottom, and a plurality of guniting through holes are formed along the outer pipe wall; the installation depth of the pressure grouting pipe is at least greater than the depth of the upper step of the step-shaped groove.

5. The anti-seepage treatment method for the basement floor construction joint as claimed in claim 1, wherein the anti-seepage treatment method comprises the following steps: when the concrete pouring process is carried out in the concrete pouring area after S5, before the concrete is poured, the separation paper of the water-swelling water stop strip in S3 needs to be removed; adding a micro-expanding agent into the poured concrete according to the addition amount of 8-10%; and after the pouring is finished, vibrating the concrete to ensure that the vibration is compact.

6. The anti-seepage treatment method for the basement floor construction joint as claimed in claim 1, wherein the anti-seepage treatment method comprises the following steps: and when the waterproof paint is coated in the step S6, the waterproof paint is coated at equal intervals along two sides of the construction joint by taking the construction joint as the center to form a waterproof paint belt.

7. The anti-seepage treatment method for the basement floor construction joint as claimed in claim 6, wherein the anti-seepage treatment method comprises the following steps: when a drain pipe is installed in S8, grooves are formed in the two sides of the waterproof coating tape along the construction joint direction; the water discharge pipe is of a semicircular structure, and the semicircular two ends of the water discharge pipe are respectively arranged in the slotted openings at the two sides of the waterproof coating tape.