CN114439051A - Underground chamber roof post-cast strip waterproof structure and construction method thereof - Google Patents
Underground chamber roof post-cast strip waterproof structure and construction method thereof Download PDFInfo
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- CN114439051A CN114439051A CN202210251722.9A CN202210251722A CN114439051A CN 114439051 A CN114439051 A CN 114439051A CN 202210251722 A CN202210251722 A CN 202210251722A CN 114439051 A CN114439051 A CN 114439051A
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 239000004567 concrete Substances 0.000 claims abstract description 121
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 239000011178 precast concrete Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims abstract description 4
- 238000004078 waterproofing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 6
- 239000002689 soil Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
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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
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a waterproof structure of a post-cast strip of a basement roof and a construction method thereof, wherein the waterproof structure comprises pre-cast concrete, a post-cast concrete strip, a steel plate net, an additional waterproof layer and a waterproof layer, gaps are formed between adjacent pre-cast concrete strips, the post-cast concrete strip is filled in the gaps, a construction joint is formed between the pre-cast concrete and the post-cast concrete strip, the vertical steel plate net is arranged in the construction joint, the additional waterproof layer is constructed on the surfaces of the pre-cast concrete and the post-cast concrete strip, the additional waterproof layer covers the construction joint, the waterproof layer is constructed on the surface of the additional waterproof layer, and the waterproof layer covers the additional waterproof layer and extends to the surface of the pre-cast concrete without the additional waterproof layer; the surface of the later-poured concrete strip is higher than that of the first-poured concrete, and the later-poured concrete strip and the first-poured concrete are in transition through a concrete slope. The waterproof material can guide water flow to be discharged outwards from a structural angle and can increase the fitting degree of the waterproof material; roof rainwater does not fall into the ground storehouse in the work progress.
Description
Technical Field
The invention relates to a waterproof structure of a post-cast strip of a top plate of an underground chamber and a construction method thereof, belonging to the building waterproof technology.
Background
With the acceleration of the urbanization process, basements for urban construction become larger and deeper, which is the result of the large-scale and high-rise urban construction and the full utilization of underground space. However, the basement belongs to hidden engineering, and if water leakage occurs in the future, the consequences can not be considered, so that the basement waterproofing engineering is particularly important and prominent. The basement bottom plate, especially the post-cast strip position is a high incidence area of seepage, and the treatment is particularly important after the basement bottom plate is well treated.
As shown in fig. 1, the most commonly used waterproof structure of the basement roof post-cast strip is formed by first making pre-cast concrete and post-cast concrete strips into planes; constructing an additional waterproof layer on the post-cast concrete strip, wherein the additional waterproof layer covers construction joints between two sides of the post-cast concrete strip and the pre-cast concrete; then constructing a waterproof layer on the additional waterproof layer, wherein the additional waterproof layer is covered by the waterproof layer; and finally, constructing and covering soil. According to the waterproof structure, because the front-pouring concrete and the rear-pouring concrete are made into planes, construction joints are not easy to find, and subsequent additional waterproof layers and waterproof layers can not be effectively covered; in addition, when rivers ooze, do not do the design of drainage water conservancy diversion, therefore the risk of infiltration is higher, and can the laminating of audio amplifier waterproof material.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention improves the current waterproof structure of the post-cast strip of the top plate of the underground chamber, provides the waterproof structure of the post-cast strip of the top plate of the underground chamber and the construction method thereof, and can greatly improve the waterproof performance of the post-cast joint.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:
a waterproof structure of a post-cast strip of a top plate of an underground chamber comprises pre-cast concrete, a post-cast concrete strip, a steel plate net, an additional waterproof layer and a waterproof layer, wherein a gap is formed between every two adjacent pre-cast concrete strips, the post-cast concrete strip is filled in the gap, a construction joint is formed between the pre-cast concrete and the post-cast concrete strip, the vertical steel plate net is arranged in the construction joint, the additional waterproof layer is constructed on the surfaces of the pre-cast concrete and the post-cast concrete strip, the additional waterproof layer covers the construction joint, the waterproof layer is constructed on the surface of the additional waterproof layer, and the waterproof layer covers the additional waterproof layer and extends to the surface of the pre-cast concrete without the additional waterproof layer; the surface of the later-poured concrete strip is higher than that of the first-poured concrete, and the later-poured concrete strip and the first-poured concrete are in transition through a concrete slope.
Preferably, the water-stopping steel plate is transversely arranged at the junction of the cast-in-place concrete and the cast-in-place concrete belt, two sides of the water-stopping steel plate respectively extend into the cast-in-place concrete and the cast-in-place concrete belt, the flaring of the water-stopping steel plate faces upwards, and the flaring of the water-stopping steel plate upwarps to prevent a lower opening of the water-stopping steel plate from reserving air bubbles to form a cavity when pouring.
Preferably, the surface of the later-poured concrete strip is 40-60 mm higher than the surface of the first-poured concrete, the width of the concrete slope is more than 300mm, and the width of the concrete slope is the width of an area directly covering the concrete slope above the first-poured concrete; the concrete is cast in advance and the concrete slope is cast and formed integrally.
Preferably, the additional waterproof layer extends to the surface of the precast concrete not covering the concrete slope. More preferably, the width of the area directly covering the additional waterproof layer above the precast concrete is 300mm or more.
Preferably, the waterproof layer extends to the surface of the pre-cast concrete which is not covered by the additional waterproof layer, and the width of the area directly covered by the waterproof layer above the pre-cast concrete is more than 300 mm.
Preferably, the steel plate net is a dense-mesh steel plate net.
Preferably, the post-cast concrete strip is cast at one time by using micro-expansion concrete with a shrinkage compensation effect.
Preferably, the post-cast concrete strip is cured in time after being poured, and the curing time is not less than 28 days.
Preferably, the post-cast concrete strip is constructed, and the subsequent additional waterproof layer and the waterproof layer are constructed after acceptance check is qualified.
A construction method of the basement roof post-cast strip waterproof structure comprises the following steps:
step 1: the steel plate nets (3) and the water stop steel plates (4) are arranged at the two sides of the post-cast concrete (2) and are fixedly and firmly fixed, the steel plate nets (3) are arranged at the upper side and the lower side of each water stop steel plate (4), the flaring of each water stop steel plate (4) is upward, and bubbles are prevented from being left at the lower openings of the water stop steel plates (4) to form cavities when pouring;
step 2: pouring the cast-in-place concrete (1) in the area outside the steel plate net (3), and simultaneously pouring to bring out a concrete slope;
and step 3: casting post-cast concrete (2) in the inner side areas of the steel plate nets (3) on the two sides, wherein the surface of the post-cast concrete belt (2) is higher than the surface of the pre-cast concrete (1), and the height difference is transited through a concrete slope;
and 4, step 4: pouring a concrete strip (2) after maintenance;
and 5: after the post-cast concrete strip (2) is qualified, constructing an additional waterproof layer (5) on the surface of the post-cast concrete strip (2) and the concrete slope, wherein the additional waterproof layer (5) covers the cast concrete strip (2), the construction joint and the concrete slope and extends to the surface area of the pre-cast concrete (1);
step 6: and after the additional waterproof layer (5) is qualified, constructing a waterproof layer (6) on the surface of the additional waterproof layer (5), wherein the waterproof layer (6) covers the additional waterproof layer (5) and extends to the surface area of the cast-in-place concrete (1).
Has the advantages that: compared with the prior art, the basement roof post-cast strip waterproof structure provided by the invention has the following advantages: (1) the structure of the upstream surface of the post-cast strip part is thickened to form a guide angle for flashing, so that water flow can be guided to be discharged from the structural angle, the fitting degree of a waterproof material can be increased, and rainwater on a top plate does not fall into a ground reservoir in the construction process; (2) by adopting the structure, accumulated water can be drained down along the slope to the part far away from the construction joint to achieve the water repellency effect of the construction joint; (3) by adopting the structure, constructors can find the additional waterproof layer part more easily without omission, and the waterproof effect of the post-cast strip part of the top plate is ensured.
Drawings
FIG. 1 is a schematic diagram of a conventional waterproof structure of a post-cast strip of a basement roof at present;
FIG. 2 is a schematic view of a waterproof structure of a post-cast strip of a basement roof provided by the invention;
the figure includes: 1-casting concrete in advance; 2-post-pouring a concrete strip; 3-dense mesh steel plate net; 4-water stop steel plate; 5-adding a waterproof layer; 6-waterproof layer; 7-covering soil.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or components must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 2, the underground chamber roof post-cast strip waterproof structure comprises a pre-cast concrete 1, a post-cast concrete strip 2, a steel plate net 3, an additional waterproof layer 5, a waterproof layer 6 and a water stop steel plate 4; gaps are formed between adjacent cast-in-place concrete 1, the cast-in-place concrete strips 2 are filled in the gaps, the surfaces of the cast-in-place concrete strips 2 are higher than the surfaces of the cast-in-place concrete 1, the cast-in-place concrete strips 2 and the cast-in-place concrete 1 are in transition through concrete slopes, and the cast-in-place concrete 1 and the concrete slopes are integrally cast and formed; the water-stopping steel plate 4 is transversely arranged at the junction of the cast-in-place concrete 1 and the cast-in-place concrete 2, two sides of the water-stopping steel plate 4 respectively extend into the cast-in-place concrete 1 and the cast-in-place concrete 2, and the flaring of the water-stopping steel plate 4 is upward; a construction joint is formed between the cast-in-place concrete 1 and the cast-in-place concrete 2, a vertical steel plate net 3 is arranged in the construction joint, an additional waterproof layer 5 is constructed on the surfaces of the cast-in-place concrete 1 and the cast-in-place concrete 2, the additional waterproof layer 5 covers the construction joint and the inclined plane of the concrete slope and exceeds the inclined plane, a waterproof layer 6 is constructed on the surface of the additional waterproof layer 5, and the waterproof layer 6 covers the additional waterproof layer 5 and exceeds the inclined plane.
The construction of the post-cast strip waterproof structure of the basement roof comprises the following steps:
step 1: the water stop steel plates 4 on two sides of the cast-in-place concrete 1 are arranged, and dense mesh steel plate nets 3 with certain rigidity for stopping the concrete are arranged on the upper side and the lower side of each water stop steel plate 4, so that the fixation is firm; the flaring of the water-stopping steel plate 4 is tilted upwards, so that bubbles are prevented from being left at the lower opening of the water-stopping steel plate 4 to form a cavity during pouring;
step 2: pouring the cast-in-place concrete 1, and pouring the concrete slope with the slope length of 300 mm;
and step 3: a post-cast concrete strip 2 is poured in a gap formed between the adjacent pre-cast concrete 1 at one time, the post-cast concrete strip 2 is made of micro-expansion concrete with a compensation shrinkage effect, and the post-cast concrete strip 2 exceeds the plane of the pre-cast concrete 1 by 50 mm;
and 4, step 4: pouring the concrete strip 2 after curing, wherein the curing time is not less than 28 days;
and 5: after the post-cast concrete strip 2 is qualified, constructing an additional waterproof layer 5 at the positions of the post-cast concrete strip 2 and the concrete slope, wherein the additional waterproof layer 5 covers and exceeds the construction joint and the concrete slope;
step 6: and after the additional waterproof layer 5 is qualified, constructing a waterproof layer 6 at the position of the additional waterproof layer 5, and covering and exceeding the additional waterproof layer 5 by the additional waterproof layer 5.
The post-cast concrete strip 2 constructed by the scheme is 50mm higher than the plane of the pre-cast concrete 1 and forms a slope with the pre-cast concrete 1, and the length of the slopes on two sides is 300 mm. The structure of the upstream surface of the post-cast concrete strip 2 is thickened to form a guide angle for flashing, so that water flow can be guided to be discharged from the structural angle, and the fitting degree of the waterproof material can be increased; roof rainwater can not fall into the basement in the work progress, and ponding can be arranged to keeping away from construction joint 300mm position down the slope, reaches the water repellent effect of construction joint. Constructors can find the additional waterproof layer part more easily without omission, and the waterproof effect of the post-cast strip part of the top plate is ensured.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (7)
1. A waterproof structure of a post-cast strip of a top plate of an underground chamber comprises pre-cast concrete (1), a post-cast concrete strip (2), a steel plate net (3), an additional waterproof layer (5) and a waterproof layer (6), wherein a gap is formed between every two adjacent pre-cast concrete strips (1), the post-cast concrete strip (2) is filled in the gap, a construction joint is formed between the pre-cast concrete strips (1) and the post-cast concrete strip (2), the vertical steel plate net (3) is arranged in the construction joint, the additional waterproof layer (5) is constructed on the surfaces of the pre-cast concrete strips (1) and the post-cast concrete strips (2), the additional waterproof layer (5) covers the construction joint, the waterproof layer (6) is constructed on the surface of the additional waterproof layer (5), and the waterproof layer (6) covers the additional waterproof layer (5) and extends to the surface of the pre-cast concrete strips (1) without the additional waterproof layer (5); the method is characterized in that: the surface of the post-cast concrete strip (2) is higher than that of the pre-cast concrete (1), and the post-cast concrete strip (2) and the pre-cast concrete (1) are in transition through a concrete slope.
2. A basement roof post-cast strip waterproofing construction according to claim 1, characterized in that: the water-stop steel plate is characterized by further comprising a water-stop steel plate (4), wherein the water-stop steel plate (4) is transversely arranged at the junction of the cast-in-advance concrete (1) and the cast-in-post concrete belt (2), two sides of the water-stop steel plate (4) respectively extend into the cast-in-advance concrete (1) and the cast-in-post concrete belt (2), and the flaring of the water-stop steel plate (4) faces upwards.
3. A basement roof post-cast strip waterproofing construction according to claim 1, characterized in that: the surface of the post-cast concrete strip (2) is 40-60 mm higher than the surface of the pre-cast concrete (1), the width of the concrete slope is more than 300mm, and the width of the concrete slope is the width of an area directly covering the concrete slope above the pre-cast concrete (1); the cast-in-place concrete (1) and the concrete slope are integrally cast and formed.
4. A basement roof post-cast strip waterproofing construction according to claim 1, characterized in that: the additional waterproof layer (5) extends to the surface of the precast concrete (1) which does not cover the concrete slope.
5. A basement roof post-cast strip waterproofing construction according to claim 4, characterized in that: the width of the area directly covered with the additional waterproof layer (5) above the cast-in-place concrete (1) is more than 300 mm.
6. The basement roof post-cast strip waterproofing structure according to claim 1, characterized in that: the waterproof layer (6) extends to the surface of the pre-cast concrete (1) which is not covered with the additional waterproof layer (5), and the width of the area directly covered with the waterproof layer (6) above the pre-cast concrete (1) is more than 300 mm.
7. A construction method of any one of the basement roof post-cast strip waterproof structures of claims 1 to 6, characterized in that: the method comprises the following steps:
step 1: the steel plate nets (3) and the water stop steel plates (4) are arranged at the two sides of the post-cast concrete (2) and are fixedly and firmly fixed, the steel plate nets (3) are arranged at the upper side and the lower side of each water stop steel plate (4), and the flaring openings of the water stop steel plates (4) are upward;
step 2: pouring the cast-in-place concrete (1) in the area outside the steel plate net (3), and simultaneously pouring to bring out a concrete slope;
and step 3: casting post-cast concrete (2) in the inner side areas of the steel plate nets (3) on the two sides, wherein the surface of the post-cast concrete belt (2) is higher than the surface of the pre-cast concrete (1), and the height difference is transited through a concrete slope;
and 4, step 4: pouring a concrete strip (2) after maintenance;
and 5: after the post-cast concrete strip (2) is qualified, constructing an additional waterproof layer (5) on the surface of the post-cast concrete strip (2) and the concrete slope, wherein the additional waterproof layer (5) covers the cast concrete strip (2), the construction joint and the concrete slope and extends to the surface area of the pre-cast concrete (1);
step 6: and after the additional waterproof layer (5) is qualified, constructing a waterproof layer (6) on the surface of the additional waterproof layer (5), wherein the waterproof layer (6) covers the additional waterproof layer (5) and extends to the surface area of the cast-in-place concrete (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210251722.9A CN114439051A (en) | 2022-03-15 | 2022-03-15 | Underground chamber roof post-cast strip waterproof structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210251722.9A CN114439051A (en) | 2022-03-15 | 2022-03-15 | Underground chamber roof post-cast strip waterproof structure and construction method thereof |
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| CN114439051A true CN114439051A (en) | 2022-05-06 |
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| CN202210251722.9A Pending CN114439051A (en) | 2022-03-15 | 2022-03-15 | Underground chamber roof post-cast strip waterproof structure and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354699A (en) * | 2022-08-23 | 2022-11-18 | 中建八局天津建设工程有限公司 | Bottom plate post-cast strip structure and construction method thereof |
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| CN204385926U (en) * | 2014-12-26 | 2015-06-10 | 江苏省矿业工程集团有限公司 | Surface dry concrete ater-casting, ground waterproofing node |
| JP2016199867A (en) * | 2015-04-08 | 2016-12-01 | 東日本旅客鉄道株式会社 | Placement joint structure for concrete structure |
| CN206635820U (en) * | 2017-04-07 | 2017-11-14 | 黄以恒 | A kind of constructing structure of sole plate post-poured strip anti-seep water |
| CN207987983U (en) * | 2017-12-31 | 2018-10-19 | 中铁十八局集团第五工程有限公司 | A kind of waterproof construction being used for underground engineering main body construction seam and post-cast strip |
| CN111042209A (en) * | 2019-12-16 | 2020-04-21 | 上海建工七建集团有限公司 | Basement roof waterproof structure and construction method thereof |
-
2022
- 2022-03-15 CN CN202210251722.9A patent/CN114439051A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204385926U (en) * | 2014-12-26 | 2015-06-10 | 江苏省矿业工程集团有限公司 | Surface dry concrete ater-casting, ground waterproofing node |
| JP2016199867A (en) * | 2015-04-08 | 2016-12-01 | 東日本旅客鉄道株式会社 | Placement joint structure for concrete structure |
| CN206635820U (en) * | 2017-04-07 | 2017-11-14 | 黄以恒 | A kind of constructing structure of sole plate post-poured strip anti-seep water |
| CN207987983U (en) * | 2017-12-31 | 2018-10-19 | 中铁十八局集团第五工程有限公司 | A kind of waterproof construction being used for underground engineering main body construction seam and post-cast strip |
| CN111042209A (en) * | 2019-12-16 | 2020-04-21 | 上海建工七建集团有限公司 | Basement roof waterproof structure and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115354699A (en) * | 2022-08-23 | 2022-11-18 | 中建八局天津建设工程有限公司 | Bottom plate post-cast strip structure and construction method thereof |
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