CN115012458A - External waterproof system of secondary concrete pouring structure in underground space and construction method - Google Patents
External waterproof system of secondary concrete pouring structure in underground space and construction method Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 85
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 239000010410 layer Substances 0.000 claims abstract description 211
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 107
- 239000011241 protective layer Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 33
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000004078 waterproofing Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000011414 polymer cement Substances 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 8
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 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
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Abstract
The invention discloses an external waterproof system of a secondary concrete pouring structure in an underground space and a construction method, wherein the external waterproof system of the secondary concrete pouring structure in the underground space comprises the following components: the original concrete structure comprises an original concrete cushion layer, an original waterproof layer, an original protective layer and an original reinforced concrete structure layer, wherein the original waterproof layer is arranged on the back surface of the original concrete cushion layer, the original protective layer is arranged on the back surface of the original waterproof layer, and the original reinforced concrete structure layer is arranged on the back surface of the original protective layer; the new concrete structure, including new concrete cushion, the drain bar, new waterproof layer, new reinforced concrete structural layer, new concrete cushion links up each other with former concrete cushion, the surface of a back of the body of new concrete cushion is located to the drain bar, the surface of a back of the body of drain bar is located to the new waterproof layer, new reinforced concrete structural layer locates the surface of a back of the body of new waterproof layer and links up each other with former reinforced concrete structural layer, be favorable to reducing waterproof construction's the degree of difficulty and new waterproof layer can play effectual guard action to new reinforced concrete structural layer.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to an external waterproof system for secondary concrete structure pouring in underground space and a construction method.
Background
In the prior art, partial underground space transformation projects need to locally destroy an original concrete structure (mainly including an original concrete cushion layer, an original waterproof layer, an original protective layer and an original reinforced concrete structure layer) so as to transform partial underground space regions, for example, a water collecting well, an elevator shaft and the like are additionally arranged in a basement. Wherein, after the project of reconstruction is completed, a new concrete structure is required to be poured for the second time in the region to be reconstructed and waterproof construction is carried out, the traditional waterproof construction generally comprises an outer waterproof mode and an inner waterproof mode, namely, a flexible waterproof material (waterproof paint or waterproof coiled material) is adopted to construct a new waterproof layer on the upstream side or the downstream side of the new reinforced concrete structure layer, however, when the new waterproof layer is constructed in the outer waterproof mode, because the original concrete structure of the region to be reconstructed in the underground space is destroyed, a large amount of open water or even water gushing phenomenon occurs in the region to be reconstructed, the waterproof paint can not form an effective waterproof coating film, the waterproof coiled material can not be effectively paved, the difficulty of waterproof construction is increased, meanwhile, the new waterproof layer and the original waterproof layer can not form a complete and closed waterproof system, and the construction joint between the new concrete structure and the original concrete structure has leakage, when a new waterproof layer is constructed in an internal waterproof mode, the new waterproof layer cannot effectively protect a new reinforced concrete structure layer, and when the conditions of high water level, high water pressure and the like of underground water occur, the new waterproof layer cannot achieve an ideal waterproof effect.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an external waterproof system of a secondary concrete pouring structure in an underground space, which is beneficial to reducing the difficulty of waterproof construction, and meanwhile, a new waterproof layer can play an effective protection role on a new reinforced concrete structure layer.
The invention also provides a construction method of the external waterproof system applied to the secondary concrete pouring structure in the underground space.
The external waterproof system for the secondary casting concrete structure of the underground space according to the embodiment of the first aspect of the invention comprises: the original concrete structure comprises an original concrete cushion layer, an original waterproof layer, an original protective layer and an original reinforced concrete structure layer, wherein the original waterproof layer is arranged on the back surface of the original concrete cushion layer, the original protective layer is arranged on the back surface of the original waterproof layer, and the original reinforced concrete structure layer is arranged on the back surface of the original protective layer; the novel concrete structure comprises a novel concrete cushion layer, a drainage plate, a novel waterproof layer and a novel reinforced concrete structure layer, wherein the novel concrete cushion layer is mutually connected with the original concrete cushion layer, the drainage plate is arranged on the back surface of the novel concrete cushion layer, the novel waterproof layer is arranged on the back surface of the drainage plate, and the novel reinforced concrete structure layer is arranged on the back surface of the novel waterproof layer and is mutually connected with the original reinforced concrete structure layer.
The external waterproof system of the secondary concrete pouring structure in the underground space, provided by the embodiment of the invention, has at least the following beneficial effects: in the process of secondary pouring of a new concrete structure in an area where underground space is transformed, the drainage plate is arranged on the back water surface of the new concrete cushion layer, the drainage plate can block underground water, the difficulty of waterproof construction is reduced, and therefore the new waterproof layer can be arranged conveniently.
According to some embodiments of the invention, the new waterproof layer extends between the original protective layer and the original reinforced concrete structural layer.
According to some embodiments of the invention, the drain board is made of PVC.
The construction method according to the second aspect embodiment of the present invention, which is applied to the external waterproofing system of the secondary casting concrete structure of the underground space according to the above first aspect embodiment of the present invention, includes the steps of: pouring a new concrete cushion layer according to the design requirement and maintaining the new concrete cushion layer; after the new concrete cushion layer is maintained, laying a drainage plate on the back surface of the new concrete cushion layer; pouring a new reinforced concrete structure layer on the back surface of the drainage plate according to design requirements and maintaining the new reinforced concrete structure layer, wherein a grouting nozzle penetrating through the new reinforced concrete structure layer is embedded in the new reinforced concrete structure layer; drilling holes in the area of the original reinforced concrete structure layer close to the new reinforced concrete structure layer and installing a grouting nozzle penetrating through the original reinforced concrete structure layer; after the new reinforced concrete structure layer is cured, filling an acrylate grouting material between the drainage plate and the new reinforced concrete structure layer through a grouting nozzle penetrating through the new reinforced concrete structure layer to form a new waterproof layer; pouring an acrylate grouting material between the original protective layer and the original reinforced concrete structure layer through a grouting nozzle penetrating through the original reinforced concrete structure layer so that the new waterproof layer extends between the original protective layer and the original reinforced concrete structure layer; observing whether a leakage phenomenon exists or not within a preset time period, and if the leakage occurs, further pouring acrylate grouting material into the area where the leakage occurs until the leakage does not occur any more; and (4) removing the grouting nozzle, and then adopting polymer cement waterproof mortar to plug the new reinforced concrete structure layer and the hole left after the grouting nozzle is removed from the original reinforced concrete structure layer.
The construction method provided by the embodiment of the invention at least has the following beneficial effects: in the process of secondary pouring of a new concrete structure in an area where underground space is reformed, the drainage plate is arranged on the back water surface of the new concrete cushion layer, the drainage plate can block underground water, the difficulty of waterproof construction is reduced, and the new waterproof layer is convenient to arrange, and meanwhile, the drainage plate and the new waterproof layer are arranged on the water facing surface of the new reinforced concrete structure layer, so that the new reinforced concrete structure layer can be effectively protected, the new reinforced concrete structure layer is prevented from being eroded by underground water, wherein the new waterproof layer is formed by acrylate grouting material gel, has strong bonding strength and elongation, can better cope with the complex environment of the underground space, and the initial setting time of the acrylate grouting material can be regulated and controlled by adjusting the proportion of each component of the acrylate grouting material, therefore, the novel waterproof layer can adapt to different construction environments, in addition, the novel waterproof layer extends to a position between the original protective layer and the original reinforced concrete structure layer, so that the orthographic projection of the edge of the novel waterproof layer in the vertical direction is overlapped with the orthographic projection of the edge of the original waterproof layer in the vertical direction, a complete and closed waterproof system is formed by the novel waterproof layer and the original waterproof layer, and the leakage at the construction joint between the novel concrete structure and the original concrete structure is favorably prevented.
According to some embodiments of the invention, the number of the grouting nozzles on the new reinforced concrete structure layer is multiple, and the multiple grouting nozzles on the new reinforced concrete structure layer are arranged in a quincunx shape.
According to some embodiments of the invention, during the process of pouring the acrylate grouting material between the drainage board and the new reinforced concrete structure layer through the grouting nozzle penetrating through the new reinforced concrete structure layer, when the acrylate grouting material overflows outwards from the grouting nozzle adjacent to the grouting nozzle which is pouring the acrylate grouting material, the next grouting nozzle is changed to pour the acrylate grouting material.
According to some embodiments of the invention, the distance between two adjacent grouting nozzles on the new reinforced concrete structure layer is 500mm-1000 mm.
According to some embodiments of the invention, the new reinforced concrete structural layer has an impermeability rating greater than or equal to P6.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an external waterproofing system of a secondary cast concrete structure of an underground space according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged schematic view of fig. 1 at B.
Reference numerals:
the concrete waterproof structure comprises an original concrete cushion layer 110, an original waterproof layer 120, an original protective layer 130, an original reinforced concrete structure layer 140, a new concrete cushion layer 210, a drainage plate 220, a new waterproof layer 230 and a new reinforced concrete structure layer 240.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if several, more than, less than, more than, above, below, or within words appear, several means are one or more, several means are two or more, more than, less than, more than, etc. are understood as not including the number, and more than, less than, within, etc. are understood as including the number.
In the description of the present invention, if the first, second, etc. terms appear, they are only used for distinguishing technical features, but are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 3, an external waterproofing system of a secondary cast concrete structure of an underground space according to an embodiment of the present invention includes an original concrete structure and a new concrete structure.
The original concrete structure comprises an original concrete cushion layer 110, an original waterproof layer 120, an original protective layer 130 and an original reinforced concrete structure layer 140, the original waterproof layer 120 is arranged on the back surface of the original concrete cushion layer 110, the original protective layer 130 is arranged on the back surface of the original waterproof layer 120, the original reinforced concrete structure layer 140 is arranged on the back surface of the original protective layer 130, the new concrete structure comprises a new concrete cushion layer 210, a drainage plate 220, a new waterproof layer 230 and a new reinforced concrete structure layer 240, the new concrete cushion layer 210 is mutually linked with the original concrete cushion layer 110, the drainage plate 220 is arranged on the back surface of the new concrete cushion layer 210, the new waterproof layer 230 is arranged on the back surface of the drainage plate 220, and the new reinforced concrete structure layer 240 is arranged on the back surface of the new waterproof layer 230 and mutually linked with the original reinforced concrete structure layer 140.
In-process of new concrete structure is pour at regional secondary that underground space reforms transform, be provided with drain bar 220 at the surface of a poor water of new concrete bed course 210, drain bar 220 can form groundwater and block, be favorable to reducing waterproof construction's the degree of difficulty, so that set up new waterproof layer 230, and simultaneously, drain bar 220 and new waterproof layer 230 set up in the upstream face of new reinforced concrete structure layer 240, can play effectual guard action to new reinforced concrete structure layer 240, be favorable to preventing that new reinforced concrete structure layer 240 from receiving the erosion of groundwater.
Referring to fig. 1 and 3, in some embodiments, the new waterproof layer 230 extends between the original protective layer 130 and the original reinforced concrete structure layer 140, so that an orthographic projection of an edge of the new waterproof layer 230 in a vertical direction overlaps with an orthographic projection of an edge of the original waterproof layer 120 in the vertical direction, so that the new waterproof layer 230 and the original waterproof layer 120 form a complete and closed waterproof system, which is beneficial to preventing leakage at a construction joint between the new concrete structure and the original concrete structure.
It should be noted that in some embodiments, the drainage plate 220 is made of PVC (polyvinyl chloride), and of course, the drainage plate 220 may also be made of polystyrene or polyethylene, which is not limited herein.
The construction method provided by the embodiment of the invention is applied to the external waterproof system of the secondary pouring concrete structure of the underground space, and comprises the following steps: pouring a new concrete cushion 210 according to the design requirement and maintaining the new concrete cushion 210; after the new concrete cushion 210 is cured, laying a drainage plate 220 on the back surface of the new concrete cushion 210; pouring a new reinforced concrete structure layer 240 on the back surface of the drainage plate 220 according to design requirements and maintaining the new reinforced concrete structure layer 240, wherein a grouting nozzle penetrating through the new reinforced concrete structure layer 240 is embedded in the new reinforced concrete structure layer 240; drilling holes in the area of the original reinforced concrete structure layer 140 close to the new reinforced concrete structure layer 240 and installing grouting nozzles penetrating through the original reinforced concrete structure layer 140; after the new reinforced concrete structure layer 240 is maintained, an acrylate grouting material is poured between the drainage plate 220 and the new reinforced concrete structure layer 240 through a grouting nozzle penetrating through the new reinforced concrete structure layer 240 to form a new waterproof layer 230; pouring an acrylate grouting material between the original protective layer 130 and the original reinforced concrete structure layer 140 through a grouting nozzle penetrating through the original reinforced concrete structure layer 140, so that the new waterproof layer 230 extends to a position between the original protective layer 130 and the original reinforced concrete structure layer 140; observing whether a leakage phenomenon exists or not within a preset time period, and if the leakage occurs, further pouring acrylate grouting material into the area where the leakage occurs until the leakage does not occur; and (3) removing the grouting nozzle, and then plugging the hole left after the new reinforced concrete structure layer 240 and the original reinforced concrete structure layer 140 are removed by using the polymer cement waterproof mortar. Specifically, a grouting device is used for grouting the acrylate grouting material, wherein a grouting process using the grouting device is a known technology in the art and is not described herein.
In the process of secondary pouring of a new concrete structure in an area where underground space is to be reformed, the drainage plate 220 is arranged on the back water surface of the new concrete cushion layer 210, the drainage plate 220 can block underground water, which is beneficial to reducing the difficulty of waterproof construction, so as to facilitate the arrangement of the new waterproof layer 230, and meanwhile, the drainage plate 220 and the new waterproof layer 230 are arranged on the water-facing surface of the new reinforced concrete structure layer 240, which can effectively protect the new reinforced concrete structure layer 240 and prevent the new reinforced concrete structure layer 240 from being eroded by underground water, wherein the new waterproof layer 230 is formed by acrylate grouting material gel, has strong adhesive strength and elongation, can better cope with the complex environment of the underground space, and the initial setting time of the acrylate grouting material can be adjusted and controlled by adjusting the ratio of each component, thereby being suitable for different construction environments, in addition, the new waterproof layer 230 extends to between the original protective layer 130 and the original reinforced concrete structure layer 140, so that the orthographic projection of the edge of the new waterproof layer 230 in the vertical direction is overlapped with the orthographic projection of the edge of the original waterproof layer 120 in the vertical direction, and thus the new waterproof layer 230 and the original waterproof layer 120 form a complete and closed waterproof system, which is beneficial to preventing the leakage at the construction joint between the new concrete structure and the original concrete structure.
It should be noted that, in some embodiments, the number of the grouting nozzles on the new reinforced concrete structure layer 240 is multiple, and the grouting nozzles on the new reinforced concrete structure layer 240 are arranged in a quincunx manner, so that the grouting nozzles on the new reinforced concrete structure layer 240 are staggered from each other, so as to form a uniform new waterproof layer 230.
It should be noted that, in some embodiments, in the process of pouring the acrylate grouting material between the drainage plate 220 and the new reinforced concrete structure layer 240 through the grouting nozzle penetrating through the new reinforced concrete structure layer 240, when the acrylate grouting material overflows from the grouting nozzle adjacent to the grouting nozzle which is pouring the acrylate grouting material, the next grouting nozzle is changed to pour the acrylate grouting material, which is beneficial to ensure that the area required by each grouting nozzle to be responsible is fully poured with the acrylate grouting material.
It should be noted that, in some embodiments, the distance between two adjacent grouting nozzles on the new reinforced concrete structure layer 240 is 500mm to 1000mm, which is beneficial to reducing the number of grouting nozzles installed on the new reinforced concrete structure layer 240 on the premise of ensuring the grouting effect.
It is noted that in some of the embodiments, the new reinforced concrete structure layer 240 has a permeability rating greater than or equal to P6 so that the new reinforced concrete structure layer 240 will not leak when subjected to a large water pressure.
In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", and "some examples", etc., reference is made to the terminology, it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The utility model provides an outer waterproof system of underground space secondary concreting structure which characterized in that includes:
the original concrete structure comprises an original concrete cushion layer (110), an original waterproof layer (120), an original protective layer (130) and an original reinforced concrete structure layer (140), wherein the original waterproof layer (120) is arranged on the back surface of the original concrete cushion layer (110), the original protective layer (130) is arranged on the back surface of the original waterproof layer (120), and the original reinforced concrete structure layer (140) is arranged on the back surface of the original protective layer (130);
the novel concrete structure comprises a novel concrete cushion layer (210), a drainage plate (220), a novel waterproof layer (230) and a novel reinforced concrete structure layer (240), wherein the novel concrete cushion layer (210) is mutually connected with the original concrete cushion layer (110), the drainage plate (220) is arranged on the back surface of the novel concrete cushion layer (210), the novel waterproof layer (230) is arranged on the back surface of the drainage plate (220), and the novel reinforced concrete structure layer (240) is arranged on the back surface of the novel waterproof layer (230) and is mutually connected with the original reinforced concrete structure layer (140).
2. The external waterproof system for secondary placement of concrete structure in underground space of claim 1, characterized in that said new waterproof layer (230) extends between said original protective layer (130) and said original reinforced concrete structure layer (140).
3. The external waterproof system for secondary placement of concrete in underground space as claimed in claim 1, wherein said drainage plate (220) is made of PVC.
4. A construction method applied to the external waterproofing system of the underground space secondary cast concrete structure of claim 2, comprising the steps of:
pouring a new concrete cushion layer (210) according to the design requirement and maintaining the new concrete cushion layer (210);
after the new concrete cushion layer (210) is cured, laying a drainage plate (220) on the back surface of the new concrete cushion layer (210);
pouring a new reinforced concrete structure layer (240) on the back water surface of the drainage plate (220) according to design requirements and maintaining the new reinforced concrete structure layer (240), wherein a grouting nozzle penetrating through the new reinforced concrete structure layer (240) is embedded in the new reinforced concrete structure layer (240);
drilling holes in the area of the original reinforced concrete structure layer (140) close to the new reinforced concrete structure layer (240) and installing grouting nozzles penetrating through the original reinforced concrete structure layer (140);
after the new reinforced concrete structure layer (240) is maintained, pouring acrylate grouting material between the drainage plate (220) and the new reinforced concrete structure layer (240) through a grouting nozzle penetrating through the new reinforced concrete structure layer (240) to form a new waterproof layer (230);
pouring acrylate grouting material between the original protective layer (130) and the original reinforced concrete structure layer (140) through a grouting nozzle penetrating through the original reinforced concrete structure layer (140) so that the new waterproof layer (230) extends to the position between the original protective layer (130) and the original reinforced concrete structure layer (140);
observing whether a leakage phenomenon exists or not within a preset time period, and if the leakage occurs, further pouring acrylate grouting material into the area where the leakage occurs until the leakage does not occur;
and (3) removing the grouting nozzle, and then adopting the polymer cement waterproof mortar to plug the holes left after the new reinforced concrete structure layer (240) and the original reinforced concrete structure layer (140) are removed from the grouting nozzle.
5. The construction method according to claim 4, wherein the number of the grouting nozzles on the new reinforced concrete structure layer (240) is multiple, and the multiple grouting nozzles on the new reinforced concrete structure layer (240) are arranged in a quincunx shape.
6. The construction method according to claim 5, wherein during the process of pouring the acrylate grouting material between the drainage plate (220) and the new reinforced concrete structure layer (240) through the grouting nozzle penetrating through the new reinforced concrete structure layer (240), when the acrylate grouting material overflows from the grouting nozzle adjacent to the grouting nozzle which is pouring the acrylate grouting material, the next grouting nozzle is changed to pour the acrylate grouting material.
7. The construction method according to claim 5, wherein the distance between two adjacent grouting nozzles on the new reinforced concrete structure layer (240) is 500mm-1000 mm.
8. The construction method according to claim 4, wherein the new reinforced concrete structural layer (240) has an impermeability rating greater than or equal to P6.
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| CN202210668019.8A CN115012458A (en) | 2022-06-14 | 2022-06-14 | External waterproof system of secondary concrete pouring structure in underground space and construction method |
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| 吴祖松等: "富水隧道复合结构体系防排水技术", 31 July 2020, 北京理工大学出版社, pages: 88 * |
| 沈春林: "防水堵漏工程技术手册", 31 May 2010, 中国建材工业出版社, pages: 925 - 926 * |
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