CN109356201B - Interface waterproof structure of new and old concrete and interface waterproof treatment method - Google Patents
Interface waterproof structure of new and old concrete and interface waterproof treatment method Download PDFInfo
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- CN109356201B CN109356201B CN201811224472.XA CN201811224472A CN109356201B CN 109356201 B CN109356201 B CN 109356201B CN 201811224472 A CN201811224472 A CN 201811224472A CN 109356201 B CN109356201 B CN 109356201B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000011282 treatment Methods 0.000 title claims abstract description 28
- 210000001503 joint Anatomy 0.000 claims abstract description 36
- 230000008569 process Effects 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 141
- 239000010959 steel Substances 0.000 claims description 141
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 124
- 239000003292 glue Substances 0.000 claims description 33
- 238000004078 waterproofing Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 5
- 239000002352 surface water Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 38
- 230000000694 effects Effects 0.000 abstract description 11
- 230000006872 improvement Effects 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000003892 spreading Methods 0.000 abstract description 2
- 230000007480 spreading Effects 0.000 abstract description 2
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- 238000004904 shortening Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 28
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000003733 fiber-reinforced composite Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
Abstract
The invention discloses an interface waterproof structure of new and old concrete and an interface waterproof treatment method, which belong to the technical field of waterproof of concrete structures. The interface waterproof structure and the interface waterproof treatment method for the new and old concrete have the advantages of simple process, simple and convenient arrangement, less requirements on construction conditions, capability of effectively shortening the construction time of the new concrete construction by spreading the interface waterproof treatment process to the time of the old concrete construction and the time of the new concrete construction, ensuring the sealing waterproof effect of the butt joint structure, suitability for various butt joint construction environments of the new and old concrete, improvement of construction efficiency, reduction of the cost of the interface waterproof treatment and great popularization and application values.
Description
Technical Field
The invention belongs to the technical field of water prevention of concrete structures, and particularly relates to a waterproof structure and a waterproof treatment method for an interface of new and old concrete.
Background
In recent years, along with the continuous acceleration of the urban process, more and more underground buildings or underground projects are built, in the process of building underground structures such as subways, underground spaces and the like, the problem of permanently plugging the butt joint or reserved holes of a new structure and an original structure is frequently encountered, the problem often involves the connection of new poured concrete and old concrete, and the problem that construction joints exist when the old concrete and the new poured concrete are in butt joint, so that the problems of water seepage, water leakage and the like of the structure after the butt joint occur, and the normal use and structural durability of the structures such as subways, underground spaces and the like are influenced.
At present, a lot of researches on the interface structure waterproofing of new and old concrete have been made, for example, in the existing patent application CN 201710243551.4, a new and old concrete interface waterproofing structure and a processing method thereof are proposed, and by paving a fiber reinforced composite material on an old concrete interface after roughening treatment and brushing an interface agent on the old concrete interface paved with the fiber reinforced composite material before pouring new concrete, the fiber reinforced composite material is fully contacted with cement paste, cement paste is better bonded, slurry leakage and shrinkage of the cement paste are reduced, the waterproofing of the new and old concrete interface structure is realized, and by arranging a kerf on the new and old concrete interface and correspondingly arranging a water stop plate corresponding to the kerf, the waterproofing effect is further enhanced.
Although the structure realizes the waterproofing of the new and old concrete interface structures to a certain extent, the structure has certain defects in practical application, and is mainly reflected in the following aspects: 1. the uniform laying difficulty of the fiber reinforced composite material net is high, the uniformity cannot be fully ensured, the coating uniformity of the interfacial agent is difficult to ensure, and the application cost is increased due to the fact that the coating uniformity is ensured, the consumption of the interfacial agent is greatly increased; 2. the cutting joint is formed by adopting equipment such as a HILTI special guide rail, a laser positioning instrument and the like, the construction process is complex, the requirements on professional skills of constructors are high, and the construction cost is increased; 3. the water stop plate is directly inserted into the old concrete structure, and epoxy resin is filled in the kerf, but the water stop plate arranged in the old concrete structure still has the problems of insufficient binding force, gaps and the like between the water stop plate and the kerf, increases a water seepage path, causes the problems of unsatisfactory waterproof effect and the like; 4. the water stop plate in the structure is slotted and embedded into the old concrete before new concrete construction, so that a certain width is necessary to be reserved in front of the connecting end face of the old concrete for caulking installation of the water stop plate, but the reserved space is limited when an underground structure is constructed, and therefore, the application of the connecting structure is limited to a certain extent; 5. the interface waterproof structure is complex in construction steps, large in construction period span, and additional time is needed for matching of the interface agent, the epoxy resin and other organic materials, so that construction cost is increased, and engineering progress and construction efficiency are affected. As can be seen from the above-mentioned drawbacks, the waterproof structure of the new and old concrete interface in the prior art has a large limitation, and it is needed to improve the waterproof structure or propose a new structure and process to meet the requirement of stable butt joint of the new and old concrete structures in the underground structure.
Disclosure of Invention
Aiming at one or more of the defects or improvement demands of the prior art, the invention provides an interface waterproof structure and an interface waterproof treatment method for new and old concrete, which can realize interface waterproof at a butt joint position after the new and old concrete are in butt joint, reduce the generation of water seepage and cracking problems, ensure the connection strength of the new and old concrete, and improve the service life of the new and old concrete butt joint structure.
In order to achieve the above object, according to one aspect of the present invention, there is provided a waterproof structure for a joint of old and new concrete, including old concrete and new concrete, characterized by further comprising a water stop assembly disposed between the old and new concrete, the water stop assembly comprising a first water stop steel plate and a second water stop steel plate; wherein,
the first water-stopping steel plate is of a strip-shaped plate structure and is arranged along the length direction of the interface end face of the old concrete, two ends of the first water-stopping steel plate along the width direction are respectively bent to the same side for a certain length to form two parallel inserting ends of the plate face, and the two inserting ends are correspondingly inserted into the interface end face, so that the first water-stopping steel plate can be tightly fixed on the interface end face; and is also provided with
The second water-stop steel plate is of a strip-shaped plate structure, the plate surface of the second water-stop steel plate is parallel to the plate surface of the insertion end and is arranged along the length direction of the first water-stop steel plate, and the second water-stop steel plate is connected to the plate surface of the first water-stop steel plate in a seamless manner and correspondingly stretches into the new concrete; and
the two sides of the second water stop steel plate are respectively provided with water stop glue, the water stop glue is arranged along the length direction of the first water stop steel plate and is correspondingly and seamlessly bonded on the plate surface of the first water stop steel plate, so that an interface waterproof structure of new and old concrete is formed, and internal waterproof after the new and old concrete are butted is realized.
As a further improvement of the invention, an end face water stop assembly is arranged between the new concrete and the old concrete and comprises a first embedded part and a second embedded part;
the first embedded part is arranged along the length direction of the end face of the interface, is correspondingly embedded in the old concrete and is flush with the surface of the old concrete by the end face;
the second embedded part is arranged along the length direction of the end face of the interface, is correspondingly embedded into the new concrete and is flush with the surface of the new concrete by the end face, and is in seamless connection with the first embedded part so as to seal a joint where the new concrete and the old concrete are in butt joint.
As a further improvement of the invention, the second water-stop steel plates are arranged at intervals along the width direction of the end face of the interface, and the second water-stop steel plates are arranged in parallel and are respectively connected with the plate surfaces of the first water-stop steel plates in a seamless manner.
As a further improvement of the invention, the end part of the second water stop steel plate, which is away from the first water stop steel plate, is bent upwards or downwards by a certain angle to form an axillary angle structure.
As a further improvement of the invention, the grouting device further comprises a grouting assembly, which comprises a grouting pipe and a grouting guide pipe, wherein the grouting pipe is arranged along the length direction of the end face of the interface, is correspondingly bonded on the plate surface of the first water stop steel plate and is correspondingly embedded into the new concrete, and a plurality of grouting holes in communicating pipes are arranged on the periphery of the grouting pipe; the grouting guide pipe is correspondingly embedded in the new concrete, one end of the grouting guide pipe is communicated with the grouting pipe, and the other end of the grouting guide pipe protrudes out of the end face of the new concrete and is used for grouting waterproof treatment after the new concrete and the old concrete are in butt joint.
As a further improvement of the invention, the grouting guide pipes are a plurality of grouting guide pipes which are arranged at intervals along the length direction of the grouting pipe.
As a further improvement of the invention, a first waterproof coiled material is arranged at the bottom of the old concrete, a second waterproof coiled material is arranged at the bottom of the new concrete, one end of the first waterproof coiled material protrudes out of the end face of the interface and correspondingly stretches into the bottom of the new concrete, and one end of the second waterproof coiled material correspondingly is lapped on the first waterproof coiled material.
As another aspect of the present invention, there is provided a method for waterproofing a joint between old and new concrete, comprising the steps of:
s1: in the forming process of the old concrete, embedding a first water-stop steel plate with a C-shaped cross section along the length direction on the end face of an interface of the old concrete, so that two ends of the first water-stop steel plate are respectively inserted into the old concrete, and the end face of the first water-stop steel plate is flush with the end face of the interface;
s2: before new concrete is formed, cleaning the end face of the interface, and seamlessly welding a second water stop steel plate on the surface of the cleaned first water stop steel plate along the length direction of the surface of the cleaned first water stop steel plate, so that the surface of the second water stop steel plate is parallel to the surface of the old concrete;
s3: correspondingly bonding water-stop glue on the plate surfaces of the first water-stop steel plates at two sides of the second water-stop steel plate along the length direction;
s4: and (3) forming new concrete, and correspondingly coating the second water stop steel plate and the water stop glue in the new concrete, so that the butt joint of the new concrete and the old concrete is finished, and the interface after the butt joint of the new concrete and the old concrete is waterproof.
As a further improvement of the invention, in step S1, a first embedded part with a strip-shaped plate structure is embedded in the old concrete, the first embedded part is arranged along the length direction of the end face of the joint, and is embedded in the junction between the surface of the old concrete and the end face of the joint, and the end face of the first embedded part is flush with the surface of the old concrete; in response to this, the control unit,
in step S2, before the new concrete is formed, a second embedded part is welded seamlessly corresponding to the first embedded part, the second embedded part is in a strip plate structure, the plate surface of the second embedded part is parallel to the plate surface of the first embedded part, one side edge of the second embedded part is welded on the side edge of the first embedded part correspondingly, and the second embedded part protrudes out of the end face of the interface.
As a further improvement of the present invention, in step S3, a setting process of the grouting assembly is correspondingly performed, which is as follows:
and correspondingly bonding a grouting pipe with grouting holes formed in the circumferential direction on the plate surface of the first water stop steel plate along the length direction of the end surface of the interface, arranging a plurality of grouting pipes with one ends communicated with the grouting pipe and the other ends higher than the surface of the old concrete corresponding to the grouting pipe, and then in step S4, correspondingly burying the grouting assembly in the new concrete.
The above-mentioned improved technical features can be combined with each other as long as they do not collide with each other.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
(1) The interface waterproof structure of the new and old concrete of the invention ensures that after the new and old concrete are butted, a multistage waterproof sealing structure is formed in the butted structure by arranging the water stop assembly consisting of the first water stop steel plate and the second water stop steel plate between the new and old concrete and correspondingly arranging the water stop glue at the two sides of the second water stop steel plate, thereby not only effectively ensuring the stable connection between the new concrete and the old concrete, but also effectively realizing the internal waterproof of the butted structure and prolonging the overall service life of the new and old concrete after the butt joint,
(2) According to the interface waterproof structure of the new and old concrete, the first water-stop steel plates and the second water-stop steel plates are arranged simply, high-precision equipment is not needed, constructors do not need to have high operation technology, the arrangement difficulty of water-stop components is effectively reduced, the construction efficiency of the interface waterproof structure is improved, the arrangement quantity of the second water-stop steel plates can be optimized according to actual needs, the flexible selection range of the internal waterproof level of the new and old concrete is provided, the application range of the interface waterproof structure is greatly improved, and the construction flexibility is improved;
(3) According to the interface waterproof structure of the new and old concrete, the end face water stop assembly is arranged at the end face of the interface of the new and old concrete, so that the end face waterproof of the interface waterproof structure of the new and old concrete is effectively realized, the end face water stop assembly can be respectively embedded into the old concrete and the new concrete by the first embedded part and the second embedded part, the arrangement form is simple, the existing structure is not required to be subjected to slotting and other treatments, the construction process of the concrete can be correspondingly completed, and the waterproof effect and the construction efficiency of the interface waterproof structure are simply, conveniently and effectively improved;
(4) According to the interface waterproof structure of the new and old concrete, the waterproof glue is correspondingly arranged on the first water stop steel plate, so that the waterproof level in the butt joint structure can be further increased, the waterproof effect is improved, the arrangement of the waterproof glue is simple, the old concrete end face is not required to be slotted and inlaid, and the waterproof glue is only required to be correspondingly bonded on the first water stop steel plate, the waterproof treatment efficiency can be effectively improved, and the treatment period is shortened;
(5) According to the waterproof structure for the joint of the new concrete and the old concrete, the grouting assembly is arranged between the new concrete and the old concrete, so that after the new concrete and the old concrete are butted, the grouting assembly can grouting into the joint of the new concrete and the old concrete to fill gaps and holes which possibly exist, and water-stop glue is enabled to expand and seal rapidly, and the waterproof effect of the butted structure is further improved;
(6) According to the interface waterproof structure of the new and old concrete, the first waterproof coiled material is arranged at the bottom of the old concrete, and the second waterproof coiled material is arranged at the bottom of the new concrete, so that the end part of the first waterproof coiled material protrudes out of the end face of the interface, namely stretches into the bottom of the new concrete, one end of the second waterproof coiled material is correspondingly lapped on the first waterproof coiled material, the bottom of the new and old concrete forms a waterproof assembly consisting of the first waterproof coiled material and the second waterproof coiled material, and the two waterproof coiled materials can greatly increase a water seepage path through lap joint, so that the waterproof effect of the butt joint structure is improved;
(7) The interface waterproof treatment method for the new and old concrete has the advantages that the steps are simple, the arrangement is simple and convenient, the structures such as the first water-stop steel plate, the first embedded part and the first waterproof coiled material can be correspondingly arranged when the old concrete is formed, the processing procedures when the new concrete is formed are reduced, the arrangement of the structures such as the second water-stop steel plate, the second embedded part and the second waterproof coiled material is simple and convenient, the interface waterproof treatment efficiency can be greatly improved, the construction period of the new and old concrete butt joint process is shortened, and the cost of the new and old concrete butt joint construction is reduced;
(8) According to the interface waterproof treatment method for the new and old concrete, the first water-stop steel plate and the second water-stop steel plate in the water-stop assembly are arranged in stages, so that the first water-stop steel plate is pre-buried when the old concrete is constructed, the second water-stop steel plate is arranged conveniently and quickly before the new concrete is constructed, and when the second water-stop steel plate is arranged, a large construction space is not required to be reserved on one side of the end face of the interface, so that the application range of the interface waterproof treatment method is greatly increased, the flexibility of the arrangement of a butt joint structure is improved, and the treatment process of the butt joint construction of the new and old concrete is simplified;
(9) The interface waterproof structure and the interface waterproof treatment method for the new and old concrete have the advantages of simple process, simple and convenient arrangement and less requirements on construction conditions, can effectively shorten the construction time of the new concrete construction by spreading the interface waterproof treatment process of the new and old concrete to the time of the old concrete construction and the time of the new concrete construction, ensure the sealing waterproof effect of the butt joint structure, can be suitable for various butt joint construction environments of the new and old concrete, improve the construction efficiency of the new and old concrete, reduce the cost of the waterproof treatment of the butt joint structure, and have great popularization and application values.
Drawings
FIG. 1 is a cross-sectional view showing the whole structure of a waterproof structure for a joint of old and new concrete in accordance with the first embodiment of the present invention;
FIG. 2 is an enlarged view of a part of the interface waterproof structure of the new and old concrete according to the first embodiment of the present invention;
FIG. 3 is a schematic diagram showing the matching of a water stop assembly and a grouting assembly of an interface waterproof structure in accordance with the first embodiment of the present invention;
FIG. 4 is a schematic structural view of a water stop assembly with a waterproof structure of an interface in a second embodiment of the present invention;
FIG. 5 is a schematic structural view of a water stop assembly with a waterproof structure of an interface in a third embodiment of the present invention;
FIG. 6 is a schematic diagram of the old concrete and enclosure matching of the interface waterproof structure in accordance with the first embodiment of the present invention;
FIG. 7 is a schematic flow chart of a waterproof treatment process of a new and old concrete interface in the embodiment of the invention;
like reference numerals denote like technical features throughout the drawings, in particular: 1. old concrete, new concrete, water stopping assembly, first water stopping steel plate and second water stopping steel plate, wherein the first water stopping steel plate and the second water stopping steel plate are respectively arranged on the two sides of the old concrete, the new concrete and the water stopping assembly; 4. the end face water stop assembly 401, a first embedded part 402, a second embedded part; 5. grouting components, namely a grouting pipe, a grouting pipe and a grouting conduit; 6. the waterproof glue comprises waterproof glue, a first waterproof coiled material, a second waterproof coiled material, a concrete cushion layer and an enclosure structure.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The waterproof structure of the new and old concrete joint in the first preferred embodiment of the present invention is shown in fig. 1 to 3, and is disposed between the old concrete 1 and the new concrete 2, wherein the new concrete 2 is poured and formed later than the old concrete 1, which may be alternatively referred to as post-pouring concrete, cast-in-place concrete, or the like, and will not be described herein.
Specifically, in the present preferred embodiment, the water stop assembly 3, the end face water stop assembly 4, and the grouting assembly 5 are provided corresponding to the old concrete 1 and the new concrete 2, respectively; wherein, the water stop assembly 3 in the first preferred embodiment is shown in fig. 2 and 3, and comprises a first water stop steel plate 301 and a second water stop steel plate 302, wherein the first water stop steel plate 301 is in an inverted C-shaped structure and correspondingly arranged on the interface end face of the old concrete 1, and comprises an end face part which is closely arranged on the end face of the old concrete 1 and an extending part which is arranged at two ends of the end face part and extends into the old concrete 1, and as shown in fig. 2, the extending parts at two sides are arranged perpendicular to the end face part and correspondingly extend into the old concrete 1; further, the first water-stop steel plates 301 are correspondingly arranged on the interface end surfaces of the old concrete 1 when the old concrete 1 is poured, namely, the first water-stop steel plates 301 are pre-buried on the interface end surfaces of the old concrete 1, the two extending parts correspondingly extend into the old concrete 1, and the inner sides of the end surface parts are tightly attached to the end surfaces of the old concrete 1; obviously, the length direction of the first water-stop steel plate 301 is the direction perpendicular to the drawing in fig. 1, that is, the length direction of the interface end surface, and the vertical cross section of the first water-stop steel plate 301 is shown in fig. 1 to 3, which is, of course, also the second water-stop steel plate 302, which is easier to understand by the related drawings, and will not be described herein.
Further, the first water-stop steel plate 301 in the first preferred embodiment is correspondingly provided with a second water-stop steel plate 302, which can be correspondingly welded on the outer end surface of the first water-stop steel plate 301 before the old concrete needs to be abutted with the new concrete 2, and the second water-stop steel plate 302 in the preferred embodiment is arranged perpendicular to the end surface of the first water-stop steel plate 301; further preferably, one end of the second water stop steel plate 302 facing away from the first water stop steel plate 301 is bent upward or downward by a certain angle to form a "wing-shaped" structure as shown in fig. 1 to 3, which may also be called as an "axillary angle" structure, by which the contact area between the second water stop steel plate 302 and the new concrete 2 may be increased, not only the connection strength between the second water stop steel plate 302 and the new concrete 2 may be improved, but also the water penetration path may be prolonged by the width of the second water stop steel plate 302, thereby improving the waterproof effect of the interface waterproof structure.
It is further preferred that an end face water stop assembly 4 is provided at the interface surface of the old concrete 1 and the new concrete 2 as shown in fig. 1; the surface of the old concrete 1, which is close to the opposite joint, is provided with a first embedded part 401, which is preferably embedded when the old concrete 1 is molded, and the set length of the first embedded part is preferably equal to the length of the end face of the joint along the longitudinal direction, namely, the length of the first water stop steel plate 301 in the first preferred embodiment; further, the first embedded part 401 in the preferred embodiment is composed of a strip-shaped steel plate and fixing parts arranged on one side end surface of the steel plate at intervals along the length direction, each fixing part is preferably perpendicular to the end surface of the steel plate, and the steel plate and the fixing parts are correspondingly embedded in the old concrete 1, and the end surface of the steel plate is flush with the surface of the old concrete 1, as shown in fig. 1; further, a second embedded part 402 is arranged at the position where the new concrete 2 is abutted against the old concrete 1, the second embedded part 402 is correspondingly embedded in the new concrete 2, the steel plates of the second embedded part are preferably overlapped on the steel plates of the first embedded part 401, and the second embedded part and the steel plates are tightly welded into an integral structure so as to cover the joint surfaces of the old concrete 1 and the new concrete 2 and prevent water on the surface of the abutted concrete structure from penetrating into the joint, thereby being used as a first waterproof measure after the new concrete and the old concrete are abutted against each other.
Further, water stop glue 6 which can expand rapidly after absorbing water is respectively arranged at two sides of the second water stop steel plate 302, is of a strip-shaped structure, and is preferably arranged along the length direction of the end face of the connector, namely, the axis of the water stop glue 6 is parallel to the length direction of the water stop assembly 3; further, the water stop glue 6 in the preferred embodiment may be preferably fixed on the end face of the old concrete 1 and pre-embedded into the new concrete 2; in the first preferred embodiment, a strip of water-stop glue 6 is provided on each side of the second water-stop steel plate 302, preferably on the end face of the first water-stop steel plate 301, and is embedded in the new concrete 2.
Further preferably, a grouting assembly 5 is arranged at the joint of the old concrete and the new concrete, and as shown in fig. 1 and 2, the grouting assembly comprises a grouting pipe 501 arranged along the length direction of the end face of the joint and a grouting conduit 502 which is correspondingly communicated with the grouting pipe 501 and the pipe orifice of which extends above the end face of the old concrete 1; further, a plurality of grouting holes are correspondingly formed in the grouting pipe 501, so that slurry in the grouting pipe 501 can correspondingly infiltrate into the joint end surfaces of new and old concrete from each grouting hole to fill gaps or holes possibly existing in the joint end surfaces, and the water-stop glue 6 near one side of the grouting pipe 501 can quickly absorb water and expand to play roles of absorbing water and stopping water; further, the grouting pipe 501 is preferably disposed between two water stop gels 6, the axis of the grouting pipe is parallel to the length direction of the end face of the joint, and the grouting pipes 502 in the first preferred embodiment are preferably a plurality of grouting pipes 502 disposed at intervals along the length direction of the grouting pipe 501, so that after the new concrete 2 is poured, grouting is performed into the grouting pipe 501 through each grouting pipe 502, so that the gap on the end face of the joint after the new concrete and the old concrete are butted is reduced, and the waterproof performance of the concrete structure after the butt joint is improved.
Further, the grouting pipe 501 in the first preferred embodiment may be correspondingly stuck on the end face of the first water stop steel plate 301, and then buried in the new concrete 2, and the grouting pipe 502 is generally buried in the new concrete 2, and the portion protruding from the new concrete 2 may be cut after the new concrete 2 is formed. Of course, the grouting pipe 501 may not be provided on the end face of the first water stop steel plate 301, and may be provided directly corresponding to the interface end face of the old concrete 1.
Further, the bottom of the old concrete 1 in the preferred embodiment is provided with a first waterproof roll 7 which protrudes from the interface end face of the old concrete 1 and correspondingly extends into the bottom of the new concrete 2; further, a second waterproof roll 8 is horizontally arranged at the bottom of the new concrete 2, one end of the second waterproof roll is correspondingly lapped on the first waterproof roll 7 protruding out of the end face of the joint, so that the waterproof rolls are arranged at the bottom of the new concrete after being butted, and water in the concrete cushion layer 9 is prevented from penetrating into the new concrete structure and the old concrete structure.
Through the arrangement, in the first preferred embodiment, when the old concrete 1 and the new concrete 2 are abutted, the waterproof sealing structure composed of the end face water stop component 4, the water stop glue 6, the water stop component 3, the water stop glue 6 and the first waterproof coiled material 7 can be sequentially formed on the end face of the interface, so that the waterproof effect of the abutted old concrete and the new concrete is fully ensured.
Further, in the second preferred embodiment, as shown in fig. 4, there are two second water-stop steel plates 302 provided on the first water-stop steel plate 301, and the two second water-stop steel plates 302 are provided at intervals in the width direction of the interface end face and welded respectively on the outer end face of the first water-stop steel plate 301; further preferably, in this embodiment, the grouting pipe 501 is disposed between the second water-stop steel plate 302 and the water-stop glue 6 near the surface of the old concrete 1, and of course, the grouting pipe 501 may also be disposed between the second water-stop steel plate 302 and the water-stop glue 6 near the bottom of the old concrete 1, or the grouting pipe 501 is disposed between two pairs of second water-stop steel plates 302 and the water-stop glue 6, which may be preferably disposed according to actual needs, and will not be described herein.
Further, in the third preferred embodiment, as shown in fig. 5, three second water-stop steel plates 302 are disposed on the first water-stop steel plate 301 at intervals along the width direction of the interface end face, each second water-stop steel plate 302 is welded on the outer end face of the first water-stop steel plate 301, and each second water-stop steel plate 302 is disposed at equal intervals, so that the level of the waterproof structure is increased, and the waterproof effect after the new and old concrete are butted is improved.
Further, in the actual construction process, the interface waterproof treatment method of the new and old concrete interface waterproof structure is preferably carried out according to the following steps:
s1: before the old concrete 1 is formed, a first waterproof coiled material 7 is preferably laid on a concrete cushion layer 9 formed by pouring, and the laying length of the first waterproof coiled material 7 is preferably protruded out of the interface end face of the old concrete 1 to be formed;
s2: forming the old concrete 1, wherein in the forming process of the old concrete 1, a first water-stop steel plate 301 is correspondingly pre-buried on the interface end face, a first embedded part 401 is pre-buried at the surface edge of the old concrete 1, then the old concrete 1 is correspondingly formed, after forming, another corresponding structure can be correspondingly arranged on one side of the interface end face of the old concrete 1 to finish construction of the corresponding underground structure, as in the first preferred embodiment, an enclosure structure 10 is correspondingly arranged on one side of the interface end face of the old concrete 1, and the first water-stop steel plate 301 is correspondingly abutted on the side wall of the enclosure structure 10, as shown in fig. 6;
s3: after the corresponding construction of the underground structure is completed, removing the enclosure structure 10, cleaning the interface end face of the old concrete 1, cleaning the interface end face, cleaning the outer side end face of the first water stop steel plate 301, and preferably chiseling the interface end faces of the old concrete 1 on two sides of the first water stop steel plate 301 into a zigzag structure so as to increase the contact area of the new concrete and the old concrete, improve the bonding strength of the new concrete and the old concrete during butt joint, and reduce the occurrence of butt joint seam conditions;
s4: correspondingly welding a second water-stop steel plate 302 on the outer side end surface of the first water-stop steel plate 301 along the length direction, wherein the plate surface of the second water-stop steel plate 302 is parallel to the surface of the old concrete 1, and one end of the second water-stop steel plate 302, which is away from the first water-stop steel plate 301, is preferably bent upwards by a certain angle to form an axillary angle structure so as to increase the bonding strength of the second water-stop steel plate 302 and the new concrete 2;
s5: the grouting pipes 501 are correspondingly arranged on the outer end face of the first water stop steel plate 301 along the length direction, a plurality of grouting holes are formed in the periphery of the grouting pipes 501 at intervals, the grouting pipes 501 are preferably bonded on the outer end face of the first water stop steel plate 301, a plurality of grouting guide pipes 502 are further arranged on the grouting pipes 501 at intervals along the length direction, and the end parts of the grouting guide pipes 502 are higher than the surface of the old concrete 1;
s6: the water stop glue 6 is correspondingly arranged on the interface end surface of the old concrete 1, and is preferably two water stop glue 6 which are respectively arranged on two sides of the second water stop steel plate 302, namely, the water stop glue 6 is arranged at intervals along the width direction of the interface end surface, the length direction of the water stop glue 6 is preferably parallel to the length direction of the second water stop steel plate 302, and the water stop glue 6 is preferably adhered at the edge of the first water stop steel plate 301;
s7: a second embedded part 402 is correspondingly welded on one side of the first embedded part 401 in a seamless manner, and the second embedded part 402 protrudes out of the interface end face of the old concrete 1 and is arranged along the length direction of the interface end face;
s8: and a second waterproof coiled material 8 is paved on the bottom surface of one side of the interface end surface, and then new concrete is poured on the second waterproof coiled material 8 of one side of the interface end surface to form new concrete 2, and the structures such as a second water stop steel plate 302, a grouting pipe 501, a grouting guide pipe 502, water stop glue 6 and the like are correspondingly coated in the new concrete, so that an integral structure is formed with the old concrete 1.
S9: the grouting pipe 501 is injected with slurry from the grouting pipe 502, and the first preferred embodiment is preferably to inject acrylic slurry, which infiltrates from grouting holes on the grouting pipe 501 to between old and new concrete, so that the water stop glue 6 is correspondingly expanded by water absorption and is correspondingly filled in gaps or holes formed between the old and new concrete.
S10: and cutting off the part of the grouting guide pipes 502 protruding out of the surface of the new concrete 2, and performing end sealing treatment on each grouting guide pipe 502 so as to finish the joint waterproof treatment of the new concrete and the old concrete.
According to the interface waterproof structure and the interface waterproof treatment method of the new and old concrete in the preferred embodiment, the structures such as the first water stop steel plate 301, the first embedded part 401 and the first waterproof coiled material 7 are embedded in the construction process of the old concrete 1, the second water stop steel plate 302, the second embedded part 402, the second waterproof coiled material 8, the grouting component 5 and the waterproof glue 6 are correspondingly arranged when the old concrete 1 needs to be abutted to the new concrete, after the new concrete is correspondingly poured, the butt joint of the old concrete 1 and the new concrete 2 is tightly connected, a multistage waterproof sealing structure is formed in the butt joint structure, the water seepage and the slotting of the connecting structure are effectively reduced, the stability and the safety of the butt joint structure of the new and old concrete are ensured, the water stop component 3 is arranged without reserving a wider space on one side of the end face of the interface, the application range of the interface waterproof structure is greatly improved, the water stop component 3 is arranged in a pre-embedded and welded mode, the slotting is not needed, the internal waterproof sealing structure can be arranged in a rapid and preferential mode according to actual needs, the operation of constructors and the high-precision, the dependency on the operation range of high-precision equipment is greatly simplified, the new and the application range of the old concrete is greatly improved, the application efficiency of the butt joint structure is greatly improved, the old construction cost is greatly prolonged, the application cost of the old concrete is prolonged, the butt joint construction process is greatly, the service cost is prolonged, and the application cost of the old concrete is guaranteed, and the construction cost is guaranteed is greatly is improved, and the construction cost is guaranteed.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The waterproof structure of the joint of the new concrete and the old concrete comprises the old concrete and the new concrete and is characterized by further comprising a water stopping component and an end surface water stopping component which are arranged between the new concrete and the old concrete, and a grouting component;
the water stop assembly comprises a first water stop steel plate and a second water stop steel plate; the first water-stop steel plate is embedded on the interface end face of the old concrete, is of a strip-shaped plate-shaped structure and is arranged along the length direction of the interface end face of the old concrete, two ends of the first water-stop steel plate in the width direction are respectively bent to the same side for a certain length to form two parallel insertion ends of the plate surface, and the two insertion ends are correspondingly inserted into the interface end face, so that the first water-stop steel plate can be tightly fixed on the interface end face; the second water-stopping steel plate is of a strip-shaped plate structure, the plate surface of the second water-stopping steel plate is parallel to the plate surface of the insertion end and is arranged along the length direction of the first water-stopping steel plate, and the second water-stopping steel plate is connected to the plate surface of the first water-stopping steel plate in a seamless manner and correspondingly stretches into the new concrete; the two sides of the second water stop steel plate are respectively provided with water stop glue, the water stop glue is arranged along the length direction of the first water stop steel plate and is correspondingly and seamlessly adhered to the plate surface of the first water stop steel plate, and then an interface waterproof structure of new and old concrete is formed, so that internal waterproof after the new and old concrete are butted is realized;
the end face water stop assembly comprises a first embedded part and a second embedded part; the first embedded part is arranged along the length direction of the end face of the interface, is correspondingly embedded in the old concrete and is flush with the surface of the old concrete by the end face; the second embedded part is arranged along the length direction of the end face of the interface, is correspondingly embedded into the new concrete and is flush with the surface of the new concrete by the end face, and is in seamless connection with the first embedded part so as to seal a joint where the new concrete and the old concrete are in butt joint;
the grouting assembly comprises a grouting pipe and a grouting guide pipe; the grouting pipe is arranged along the length direction of the end face of the joint, is correspondingly bonded on the plate surface of the first water stop steel plate and is correspondingly embedded into the new concrete, and a plurality of grouting holes in the communicating pipe are formed in the periphery of the grouting pipe; the grouting guide pipe is correspondingly embedded in the new concrete, one end of the grouting guide pipe is communicated with the grouting pipe, and the other end of the grouting guide pipe protrudes out of the end face of the new concrete and is used for grouting waterproof treatment after the new concrete and the old concrete are in butt joint; and is also provided with
The bottom of old concrete is provided with first waterproofing membrane, the bottom of new concrete is provided with the second waterproofing membrane, first waterproofing membrane's one end protrusion in the interface terminal surface corresponds and stretches into the bottom of new concrete, just second waterproofing membrane's one end corresponds to be taken on the first waterproofing membrane.
2. The joint waterproof structure of new and old concrete according to claim 1, wherein the second water-stop steel plates are a plurality of second water-stop steel plates which are arranged at intervals along the width direction of the joint end face, are arranged in parallel, and are respectively connected with the plate surfaces of the first water-stop steel plates in a seamless manner.
3. The joint waterproof structure of new and old concrete according to claim 1 or 2, wherein the end of the second water stop steel plate facing away from the first water stop steel plate is bent upward or downward by a certain angle to form an axillary angle structure.
4. The joint waterproof structure of new and old concrete according to claim 1 or 2, wherein the grouting guide pipes are a plurality of the grouting guide pipes which are arranged at intervals along the length direction of the grouting pipe.
5. A waterproof treatment method for a joint of new and old concrete is used for waterproof of the joint of the new and old concrete, and comprises the following steps:
s1: in the forming process of the old concrete, embedding a first water-stop steel plate with a C-shaped cross section along the length direction on the end face of an interface of the old concrete, so that two ends of the first water-stop steel plate are respectively inserted into the old concrete, and the end face of the first water-stop steel plate is flush with the end face of the interface; the first embedded part is arranged in the old concrete in a pre-buried mode and is of a strip-shaped plate structure, the first embedded part is arranged along the length direction of the end face of the joint, the first embedded part is arranged at the junction of the surface of the old concrete and the end face of the joint in a pre-buried mode, and the end face of the first embedded part is flush with the surface of the old concrete;
s2: before new concrete is formed, cleaning the end face of the interface, and seamlessly welding a second water stop steel plate on the surface of the cleaned first water stop steel plate along the length direction of the surface of the cleaned first water stop steel plate, so that the surface of the second water stop steel plate is parallel to the surface of the old concrete; before the new concrete is formed, a second embedded part is welded corresponding to the first embedded part in a seamless mode, the second embedded part is of a strip plate-shaped structure, the plate surface of the second embedded part is parallel to the plate surface of the first embedded part, one side edge of the second embedded part is welded on the side edge of the first embedded part correspondingly, and the second embedded part protrudes out of the end face of the interface;
s3: correspondingly bonding water-stop glue on the plate surfaces of the first water-stop steel plates at two sides of the second water-stop steel plate along the length direction;
s4: and (3) forming new concrete, and correspondingly coating the second water stop steel plate and the water stop glue in the new concrete, so that the butt joint of the new concrete and the old concrete is finished, and the interface after the butt joint of the new concrete and the old concrete is waterproof.
6. The joint waterproofing method of old and new concrete according to claim 5, wherein in step S3, a setting process of a grouting assembly is correspondingly performed, which is as follows:
and correspondingly bonding a grouting pipe with grouting holes formed in the circumferential direction on the plate surface of the first water stop steel plate along the length direction of the end surface of the interface, arranging a plurality of grouting pipes with one ends communicated with the grouting pipe and the other ends higher than the surface of the old concrete corresponding to the grouting pipe, and then in step S4, correspondingly burying the grouting assembly in the new concrete.
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| CN109629845A (en) * | 2019-01-11 | 2019-04-16 | 中国冶集团有限公司 | Concrete structure seam areas leakage treatment device and its construction method |
| CN110670630A (en) * | 2019-10-12 | 2020-01-10 | 中铁十八局集团有限公司 | Underground engineering connection new and old concrete interface waterproof structure and processing method |
| CN111456090A (en) * | 2020-04-09 | 2020-07-28 | 中铁（天津）隧道工程勘察设计有限公司 | Waterproof structure and method for concrete construction joint of immersed tube tunnel |
| CN111519665A (en) * | 2020-05-06 | 2020-08-11 | 青岛天源伟业保温防水工程有限公司 | Gapless filling method for foundation post-cast strip |
| CN115059317B (en) * | 2022-06-24 | 2024-01-26 | 湖南省筱沅水利水电建设有限公司 | Seepage-proofing connection structure of building and construction method thereof |
| CN115142468B (en) * | 2022-06-29 | 2024-03-29 | 中冶建工集团有限公司 | Waterproof construction method for junction of bottom plates of new basement and old basement |
| CN115182389B (en) * | 2022-07-20 | 2024-02-09 | 华北水利水电大学 | Water seepage prevention structure at junction of new and old concrete structures of subway engineering and construction process |
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