CN109440951B - Waterproof structure for joint of new and old concrete structures and construction process - Google Patents
Waterproof structure for joint of new and old concrete structures and construction process Download PDFInfo
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- CN109440951B CN109440951B CN201811430877.9A CN201811430877A CN109440951B CN 109440951 B CN109440951 B CN 109440951B CN 201811430877 A CN201811430877 A CN 201811430877A CN 109440951 B CN109440951 B CN 109440951B
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- structural joint
- concrete structure
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 52
- 239000010426 asphalt Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000013521 mastic Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
Abstract
The invention belongs to the technical field of civil engineering construction, and particularly relates to a waterproof structure for a new and old concrete structure intersection structure seam and a construction process. The invention adopts the mode of blocking firstly, then dredging and then blocking, overcomes the damage caused by the deformation of different structures at the joint of the new and old concrete structures, and greatly saves the later maintenance cost.
Description
Technical Field
The invention belongs to the technical field of civil engineering construction, and particularly relates to a waterproof structure for a joint of an old concrete structure and a new concrete structure and a construction process.
Background
The water seepage of the structural joint is a common quality common problem in the construction of concrete structures, and is a joint formed between new concrete and old concrete, and the deformation values of the new concrete structure and the old concrete structure are different due to the construction process, foundation and the like, so that the water prevention of the structural joint at the intersection of the new concrete structure and the old concrete structure becomes a quality weak point. At present, the seam of the structure is generally waterproof by adopting an inner water stop strip and an outer water stop strip, but the waterproof effect of the mode is not ideal, and the water stop strips are easily torn due to different deformation values of different structures, so that quality defects such as water leakage of structures such as tunnels, underground pipe galleries and the like are caused.
Other methods for waterproofing at the structural joint are also disclosed at present, for example, publication number is CN106638710A, the name is New and old underground building joint construction joint waterproof treatment process, a grouting pipe is communicated with an IT pipe, grouting can be performed through grouting to a grouting pipe close to a water leakage point, and grouting and an SM adhesive tape form a separation layer, so that leakage is avoided; for example, the publication number is CN1837528A, the name is waterproof construction method and structure of expansion joint of new and old concrete building joint, and it discloses that joint filling material is laid in the joint, expansion strips are laid on the joint filling material, and joint filling material is laid in the expansion strips. However, the existing methods cannot fundamentally solve the problems, and the pressure water at the structural joint cannot be decompressed, so that the leakage problem caused by different deformation values is solved, and the final waterproof effect and durability cannot be ensured.
Disclosure of Invention
The invention provides a waterproof structure for a joint structure of new and old concrete structures and a construction process thereof, which aims to solve the defects of the prior art.
The invention is realized by the following technical scheme:
the utility model provides a new and old concrete structure looks intersection structural joint waterproof construction, is acted on the crossed structural joint of old concrete structure thing and new concrete structure thing, paste the waterproof layer in the structural joint outside, set up the annular drainage infiltration pipe along structural joint in the inboard of waterproof layer, be equipped with the infiltration hole on the drainage infiltration pipe wall, drainage infiltration pipe one end links to each other with the drainage side ditch, inwards paste two annular water expansion sealing rubber strips in proper order at structural joint, be fixed with the slip casting pipe between two water expansion sealing rubber strips, slip casting pipe preset installation is in new concrete structure thing one side, and structural joint inboard sets up the extruded sheet, utilizes slip casting pipe to press the injection micro-expansion grout to structural joint department after the new concrete structure thing is under construction, and the inboard rejection extruded sheet of structural joint is poured into pitch MATIC fat, and the innermost side surface of structural joint forms the waterstop mounting groove, and waterstop mounting groove notch department installs detachable rubber waterstop.
The grouting pipes are two.
The invention also comprises a waterproof construction process for the new and old concrete structure intersection structural joint, which comprises the following steps:
(1) Adhering a waterproof layer outside the new concrete structure, and overlapping the waterproof layers of the new concrete structure and the old concrete structure;
(2) A circumferential drainage seepage pipe is arranged on the inner side of the waterproof layer along the structural joint, and one end of the drainage seepage pipe is connected with a nearby drainage side ditch through a pipeline;
(3) Sequentially sticking two annular water-swelling water-stopping rubber strips inwards to the structural joint;
(4) A grouting pipe is fixed between the two water-swelling water-stopping rubber strips, and one end of the grouting pipe is led out from the new concrete structure;
(5) Arranging an extruded sheet on the inner side of the structural joint to form a deformation joint;
(6) Casting and constructing a new concrete structure;
(7) Removing the extruded sheet at the inner side of the structural joint, and pouring asphalt mastic;
(8) Injecting micro-expansion cement paste into the structural joint by utilizing the pre-embedded grouting pipe;
(9) And removing the structural joint to form a water stop belt mounting groove, and mounting a detachable rubber water stop belt at the notch of the water stop belt mounting groove.
As a preferable scheme:
in the step (1), a waterproof reinforcing layer is arranged at the lap joint of the waterproof layer, and the waterproof reinforcing layer adopts an SBS asphalt self-adhesive waterproof coiled material.
In the step (2), the drainage seepage pipe is encapsulated by adopting non-woven fabrics, and is fixed by adopting an adhesive during installation.
In the step (3), the joint is ensured not to leave a break point when the water-swelling water stop rubber strip is constructed, the lap joint length is not less than 50mm, and the water-swelling water stop rubber strip is fixed by adopting an adhesive.
In the step (8), a secondary grouting process is adopted for grouting.
The beneficial effects of the invention are as follows: the waterproof structure overcomes the damage caused by deformation of different structures at the joint of the new and old concrete structures, and adopts the mode of plugging firstly and then dredging and plugging, and firstly, the waterproof layer is arranged at the outermost side to form a first waterproof structure; secondly, in order to prevent local leakage after the first waterproof layer is failed, a circumferential drainage seepage pipe is arranged, and leaked pressurized water is decompressed and guided into a drainage side ditch; and then grouting and sealing the middle of the structural joint, installing a water stop belt on the inner side of the structural joint and the like for blocking layer by layer, wherein the blocking and dredging processes are combined, so that the water leakage and water seepage phenomenon at the structural joint is avoided, the engineering quality is ensured, the later maintenance cost is greatly saved, and good social benefit and economic benefit are obtained.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure, 1 old concrete structure, 2 new concrete structure, 3 structural joints, 4 waterproof layers, 5 drainage seepage pipes, 6 water swelling water stop rubber strips, 7 grouting pipes, 8 asphalt mastic and 9 water stop mounting grooves.
Detailed Description
The following specific embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present invention.
The waterproof structure of the invention acts on the structure joint 3 where the old concrete structure 1 and the new concrete structure 2 intersect, and is used for solving the problems of water leakage and the like caused by deformation damage at the structure joint 3 due to overlarge deformation. The waterproof structure of the invention is as follows:
a waterproof layer 4 is stuck on the outer side of the structural joint 3 to form a first external blocking waterproof structure; the inner side of the waterproof layer 4 is provided with a circumferential drainage seepage pipe 5 along the structural joint 3, the pipe wall of the drainage seepage pipe 5 is provided with seepage holes, one end of the drainage seepage pipe 5 is connected with a nearby drainage side ditch, the drainage seepage pipe 5 guides pressure water to the drainage side ditch through the seepage holes, the drainage seepage pipe 5 plays a role in reducing pressure and guiding flow, and an inner sparse structure is formed so as to prevent local seepage after the first waterproof layer 4 fails;
sequentially sticking two annular water-swelling water-stopping rubber strips 6 inwards to the structural joint 3, as shown in a figure 1, fixing a grouting pipe 7 between the two water-swelling water-stopping rubber strips 6, wherein the grouting pipe 7 is preferably two, the grouting pipe 7 is arranged on one side of the new concrete structure 2 in a preset manner, the grouting pipe 7 is used for injecting micro-swelling cement paste into the structural joint 3, thus forming a seal in the structural joint 3, and once water of the structural joint 3 continuously leaks inwards, the two water-swelling water-stopping rubber strips 6 and the micro-swelling cement paste injected in the middle pressure seal water layer by layer;
after the construction of the new concrete structure 2 is completed, the extruded sheet is removed from the inner side of the structural joint 3, then asphalt is filled into the asphalt mastic 8, a water stop belt mounting groove 9 is formed on the innermost surface of the structural joint 3, a detachable rubber water stop belt is mounted at the notch of the water stop belt mounting groove 9, the detachable rubber water stop belt further plays a role in plugging, and further later maintenance is facilitated.
The waterproof structure is firstly blocked and then is dredged and blocked, a waterproof structure is formed on the outer layer, then the pressure water is released, the pressure water is not available, the structural joint 3 is not easy to leak water, even if part of water after pressure release continues to permeate inwards, the inner water-swelling water-stopping rubber strip 6, the micro-swelling cement paste, the asphalt mastic 8 and the detachable rubber water stop strip can also form layer-by-layer blocking for the waterproof structure, and the problem of water leakage and water seepage is thoroughly eradicated.
The construction process of the seam waterproof structure of the new and old concrete structure intersection structure comprises the following steps:
(1) The waterproof layer 4 is attached to the outside of the new concrete structure 2, and the new concrete structure 2 and the waterproof layer 4 of the old concrete structure 1 are overlapped. The lap joint can be provided with a waterproof reinforcing layer, and the waterproof reinforcing layer adopts SBS asphalt self-adhesive waterproof coiled materials.
(2) The inner side of the waterproof layer 4 is provided with the annular drainage seepage pipe 5 along the structural joint 3, the drainage seepage pipe 5 is arranged along one circle of the structural joint 3, the drainage seepage pipe 5 is encapsulated by adopting non-woven fabrics, the waterproof layer is fixed by adopting an adhesive during installation, one end of the drainage seepage pipe 5 is connected with a nearby drainage side ditch, so that pressure water is discharged and guided into a drainage system of engineering, and the inward seepage force and possibility of water losing pressure are greatly reduced.
(3) Two annular water-swelling water-stop rubber strips 6 are sequentially stuck inwards at the structural joint 3, break points are not easy to leave at joints during construction of the water-swelling water-stop rubber strips 6, and the lap joint length is not less than 50mm. Before construction, the water-swelling water-stop rubber strip 6 is subjected to roughening treatment on the concrete contact surface, scum is cleaned, and the concrete contact surface is fixed by adopting an adhesive. The water-swelling water-stop rubber strip 6 is prevented from being soaked by water before pouring concrete after being positioned. When the concrete is vibrated, the vibrating rod cannot contact the water-swelling water stop rubber strip 6.
(4) A grouting pipe 7 is fixed between the two water-swelling water-stopping rubber strips 6, and one end of the grouting pipe 7 is led out from the new concrete structure 2. The grouting pipe 7 is reserved with a grouting hole at intervals, the grouting pipe 7 is encapsulated by adopting non-woven fabrics, the grouting pipe 7 is fixed at intervals, and two grouting pipes 7 are arranged.
(5) And arranging an extruded sheet on the inner side of the structural joint 3 to form a deformation joint.
(6) And pouring and constructing a new concrete structure 2.
(7) After pouring, removing the extruded sheet at the inner side of the structural joint 3, and pouring asphalt mastic 8;
(8) Grouting by using a pre-buried grouting pipe 7, wherein micro-expansion cement slurry is adopted for grouting, the grouting pressure is about 0.5Mpa, the micro-expansion cement slurry is pressed and injected into the structural joint 3, and secondary grouting is performed after primary grouting is finished;
(9) The end part of the old concrete structure 1 is manually removed to form a water stop mounting groove 9, the water stop mounting groove 9 is reserved on the innermost surface of the structural joint 3 of the newly-built new concrete structure 2, then the water stop mounting groove 9 is finally formed at the structural joint 3, a detachable rubber water stop is mounted at the notch of the water stop mounting groove 9, and the water stop is fixed by adopting a steel plate and a nut. Thus, the layer-by-layer waterproof structure is constructed.
The waterproof structure and the construction process greatly save the maintenance cost in the later period, the second standard section of the overhead south delay project of the Jianan city and the second round south road construction project (the western section) of the Jinan city is the key project of the Jinan city, and the quality requirement is high, and by taking the two projects as examples, the maintenance cost saved in the service life of the calculated tunnel design is about 35 ten thousand yuan when the waterproof construction method is adopted at the joint 3 of the open tunnel and the undercut tunnel structure.
The above embodiment is only one of the preferred embodiments of the present invention, and the ordinary changes and substitutions made by those skilled in the art within the scope of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a new and old concrete structure looks intersection structural joint waterproof construction, acts on structure seam (3) that old concrete structure (1) and new concrete structure (2) intersect, its characterized in that: the waterproof layer (4) is adhered to the outer side of the structural joint (3), the annular drainage seepage pipe (5) is arranged on the inner side of the waterproof layer (4) along the structural joint (3), seepage holes are formed in the pipe wall of the drainage seepage pipe (5), one end of the drainage seepage pipe (5) is connected with a drainage side ditch, two annular water-swelling water-stop rubber strips (6) are adhered to the inner side of the structural joint (3) in sequence, a grouting pipe (7) is fixed between the two water-swelling water-stop rubber strips (6), the grouting pipe (7) is pre-installed on one side of a new concrete structure (2), an extruded sheet is arranged on the inner side of the structural joint (3), micro-swelling cement paste is injected to the structural joint (3) by the grouting pipe (7) after the construction of the new concrete structure (2), asphalt mastic (8) is injected after the extruded sheet is removed from the inner side of the structural joint (3), an innermost side surface of the structural joint (3) forms a water-stop mounting groove (9), and a detachable rubber water-stop strip is installed at a notch of the water-stop mounting groove (9); the lap joint of the waterproof layer (4) is provided with a waterproof reinforcing layer, and the waterproof reinforcing layer adopts an SBS asphalt self-adhesive waterproof coiled material; the grouting pipes (7) are two.
2. A construction process of a new and old concrete structure intersection structural joint waterproof structure is characterized by comprising the following steps: the method comprises the following steps:
(1) Adhering a waterproof layer (4) to the outside of the new concrete structure (2), and overlapping the waterproof layer (4) of the new concrete structure (2) and the waterproof layer (4) of the old concrete structure (1);
(2) A circumferential drainage seepage pipe (5) is arranged along the structural joint (3) at the inner side of the waterproof layer (4), and one end of the drainage seepage pipe (5) is connected with a nearby drainage side ditch;
(3) Sequentially sticking two annular water-swelling water-stopping rubber strips (6) inwards to the structural joint (3);
(4) A grouting pipe (7) is fixed between the two water-swelling water-stopping rubber strips (6), and one end of the grouting pipe (7) is led out from the new concrete structure (2);
(5) Arranging an extruded sheet on the inner side of the structural joint (3) to form a deformation joint;
(6) Pouring and constructing a new concrete structure (2);
(7) Removing the extruded sheet at the inner side of the structural joint (3), and pouring asphalt mastic (8);
(8) Injecting micro-expansion cement paste into the structural joint (3) by utilizing an embedded grouting pipe (7);
(9) The structural joint (3) is removed to form a water stop mounting groove (9), and a detachable rubber water stop is arranged at the notch of the water stop mounting groove (9).
3. The construction process for the waterproof structure of the new and old concrete structure intersection structural joint according to claim 2, wherein the construction process comprises the following steps: in the step (1), a waterproof reinforcing layer is arranged at the lap joint of the waterproof layer (4), and the waterproof reinforcing layer adopts an SBS asphalt self-adhesive waterproof coiled material.
4. The construction process for the waterproof structure of the new and old concrete structure intersection structural joint according to claim 2, wherein the construction process comprises the following steps: in the step (2), the drainage seepage pipe (5) is encapsulated by adopting non-woven fabrics, and is fixed by adopting an adhesive during installation.
5. The construction process for the waterproof structure of the new and old concrete structure intersection structural joint according to claim 2, wherein the construction process comprises the following steps: in the step (3), no break point is left at the joint during construction of the water-swelling water stop rubber strip (6), the lap joint length is not less than 50mm, and the water-swelling water stop rubber strip is fixed by adopting an adhesive.
6. The construction process for the waterproof structure of the new and old concrete structure intersection structural joint according to claim 2, wherein the construction process comprises the following steps: in the step (8), a secondary grouting process is adopted for grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430877.9A CN109440951B (en) | 2018-11-28 | 2018-11-28 | Waterproof structure for joint of new and old concrete structures and construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430877.9A CN109440951B (en) | 2018-11-28 | 2018-11-28 | Waterproof structure for joint of new and old concrete structures and construction process |
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| Publication Number | Publication Date |
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| CN109440951A CN109440951A (en) | 2019-03-08 |
| CN109440951B true CN109440951B (en) | 2024-03-01 |
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| CN201811430877.9A Active CN109440951B (en) | 2018-11-28 | 2018-11-28 | Waterproof structure for joint of new and old concrete structures and construction process |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258649A (en) * | 2019-07-12 | 2019-09-20 | 中冶天工集团有限公司 | One kind, which connects, builds engineering Underground Construction seam water-tight device and construction method |
| CN112709262A (en) * | 2020-12-24 | 2021-04-27 | 上海建工二建集团有限公司 | Waterproof construction method for concrete structure and waterproof structure |
| CN113090068B (en) * | 2021-04-23 | 2023-01-24 | 天津核海源科技发展有限公司 | Vacuum pouring process for rush-repairing deep-buried building top concrete structure under limited conditions |
| CN113186985B (en) * | 2021-04-26 | 2022-10-14 | 上海宝冶集团南京建筑有限公司 | Anti-seepage treatment method for basement bottom plate construction joint |
| 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 |
| CN115506416B (en) * | 2022-09-26 | 2024-03-12 | 华北水利水电大学 | Lining grouting waterproof structure of junction between new concrete and old concrete of underground engineering and construction process |
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