CN108360573B - Device for preventing post-cast strip of basement floor from leaking and construction method thereof - Google Patents
Device for preventing post-cast strip of basement floor from leaking and construction method thereof Download PDFInfo
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- CN108360573B CN108360573B CN201810054871.XA CN201810054871A CN108360573B CN 108360573 B CN108360573 B CN 108360573B CN 201810054871 A CN201810054871 A CN 201810054871A CN 108360573 B CN108360573 B CN 108360573B
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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
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Abstract
The invention discloses a device for preventing a post-cast strip of a bottom plate of an underground chamber from leaking and a construction method thereof. The device includes and has opened the inlet channel from supreme stone layer and the drain bar of laying on the basement bottom plate down, on the drain bar, during the inlet channel was gone into in the installation of pressure release steel casing bottom, was equipped with the leading water pipe in the pressure release steel casing, during the stone layer was gone into in the installation of leading water pipe bottom, the drain bar upper surface was equipped with fine stone concrete layer, was equipped with basic concrete layer and post-cast strip concrete layer on the fine stone concrete layer, and it has fine stone concrete to fill between leading water pipe and the pressure release steel casing, and the port cooperation is provided with the end cap on the leading. The invention has simple structure, flexible construction, safety and reliability, effectively reduces the probability of the occurrence of water leakage of the basement bottom plate, greatly reduces the probability and workload of later plugging and maintenance, is suitable for popularization and application, is particularly suitable for post-cast strip of the basement bottom plate in industrial and civil building engineering, and has particularly obvious economic benefit for projects with higher underground water level.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a device for preventing a post-cast strip of a basement floor from leaking and a construction method thereof.
Background
With the continuous development of the large and deep building scale of urban underground space, in order to ensure the structural integrity and the impermeability of basement structures, post-cast strips are generally adopted as temporary deformation seams reserved in cast-in-place reinforced concrete structures. And after the sealing condition is reached, the post-cast strip is sealed by micro-expansion concrete, so that the structure forms a continuous whole. In the construction of sealing the basement floor post-cast strip, the anti-floating and anti-permeability become key technical problems of the sealing construction of the basement floor post-cast strip, and are closely related to the problems of later-stage leakage stoppage, maintenance and the like.
The traditional method for the basement bottom plate post-cast strip is that the post-cast strip is integrally cast or cast in sections, and by the construction method, pressure can not be released due to overlarge water pressure of the bottom plate, so that concrete of the post-cast strip cannot completely reach the condensation strength and bears the water pressure prematurely, hidden dangers are buried for the problem of water leakage of the post-cast strip, and a series of complex work such as later-stage leakage stoppage, maintenance and the like is undoubtedly added. According to the traditional method, the problem of water pressure under the basement bottom plate cannot be solved in the early stage, so that a large amount of manpower and material resources are consumed for later plugging and maintenance, and the environment and the use of an owner are inevitably affected.
Disclosure of Invention
In view of the above problems in the prior art, the present invention is directed to a device for preventing leakage of a post-cast strip of a floor of an underground chamber and a method for constructing the same.
Prevent basement bottom plate post-cast strip seepage device, include and lay stone layer and drain bar on the basement bottom plate from supreme down, it has the inlet to open on its characterized in that drain bar, install into in the inlet rather than closely cooperating with pressure release steel casing bottom, be equipped with the leading water pipe in the pressure release steel casing, during the stone layer was installed into to the leading water pipe bottom, the drain bar upper surface was equipped with fine stone concrete layer, be equipped with basic concrete layer and post-cast strip concrete layer on the fine stone concrete layer, it has fine stone concrete to fill between leading water pipe and the pressure release steel casing, the cooperation of port is provided with the end cap on the leading water pipe.
The device for preventing the seepage of the post-cast strip of the underground chamber bottom plate is characterized in that the thickness of a stone layer is 35mm-50mm, and the particle size of the stone is 10-25 mm.
The device for preventing the post-cast strip leakage of the underground chamber bottom plate is characterized in that fine aggregate concrete with the thickness of 10mm is poured in the small hole of the drainage plate in a covering mode.
The device for preventing the post-cast strip of the underground chamber bottom plate from leaking is characterized in that six notches are uniformly formed in the bottom of the pressure relief steel sleeve, and a steel wire mesh is bound and arranged at the bottom of the pressure relief steel sleeve through the notches.
The device for preventing the seepage of the post-cast strip of the floor of the underground chamber is characterized in that the drainage plate adopts an FSH25 cross drainage plate, the height is 25mm, the unit mass is 1050g/m, and the breaking elongation is more than or equal to 25 percent.
The device for preventing the post-cast strip of the underground chamber floor from leaking is characterized in that a water conduit adopts a DN40 galvanized pipe, and the upper opening of the water conduit extends out of the upper surface of a concrete layer of the post-cast strip by 45-55 mm; water stop sheets are respectively welded on the outer wall of the water conduit and the inner wall of the pressure relief steel sleeve; and a water stop steel plate is welded on the outer wall of the pressure relief steel sleeve.
The device for preventing the seepage of the post-cast strip of the bottom plate of the underground chamber is characterized in that the welding positions of the water stop sheet and the water stop steel plate are both positioned between the surface layer steel bar and the bottom layer steel bar of the post-cast strip.
The construction method for preventing the leakage of the post-cast strip of the underground chamber bottom plate is characterized by comprising the steps of laying stones and drainage plates, positioning pressure-relief steel sleeves, pouring fine stone concrete, binding reinforcing steel bars of the foundation bottom plate, pouring concrete of the post-cast strip, burying and sealing gaps of the water conduit, plugging the water conduit and constructing a terrace.
The construction method for preventing the post-cast strip of the underground chamber floor from leaking is characterized by comprising the following specific steps of:
1) before laying the drainage plate, the stone and the drainage plate are laid on the basement bottom plate to serve as a filter layer, so that water can be guaranteed to circulate at the lower part of the drainage plate, a hole is cut in the middle of the drainage plate to serve as a water diversion port of the pressure relief steel sleeve, and fine stone concrete of 10mm is poured into the small hole of the drainage plate in a covering mode;
2) the bottom of the pressure relief steel sleeve positioning pressure relief steel sleeve is uniformly provided with six notches and is bound with a steel wire mesh, and then the bottom of the pressure relief steel sleeve extends into a water diversion port of the drainage plate and is positioned below the surface of the drainage plate;
3) pouring fine stone concrete on the drainage plate, wherein the strength of the fine stone concrete is higher than that of the basement bottom plate concrete by one grade;
4) binding the reinforcing steel bars of the foundation slab to reinforcing steel bars of the foundation slab, wherein the reinforcing steel bars of the foundation slab comprise surface layer reinforcing steel bars and bottom layer reinforcing steel bars, binding a square reinforcing cage on the outer side of a pressure relief steel sleeve at the same time, binding the surface layer reinforcing steel bars, and binding a square reinforcing cage on the outer side of the pressure relief steel sleeve;
5) concrete pouring of foundation slab
6) Before post-cast strip concrete pouring, temporarily sealing the upper opening of the pressure relief steel sleeve by using an adhesive tape, then performing concrete pouring, roughening the edge of the post-cast strip and cleaning reinforcing steel bars, wherein the post-cast strip concrete adopts micro-expansion fine stone concrete with the grade higher than that of the foundation bottom plate concrete by one grade, and in the pouring process, a vibrating rod is obliquely inserted below a water stop steel plate and performs secondary re-vibration before initial setting;
7) embedding and gap sealing of the water conduit, cutting a pressure relief steel sleeve (1) higher than concrete of a foundation base plate to be flush with the base plate, embedding the water conduit, extending the bottom of the water conduit to the bottom of a stone layer, and filling and compacting a gap between the water conduit and the pressure relief steel sleeve by micro-expansion fine stone concrete;
8) after the post-cast strip concrete reaches the strength, the water conduit is plugged by adopting a threaded pipe cap, and then the floor construction is carried out.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects: aiming at the problems of floating of the basement, large-area water leakage and the like caused by overlarge water pressure under the basement bottom plate in the industry, the pressure relief pipe is pre-embedded firstly and then the post-cast strip is sealed, and the pressure relief pipe is plugged after the concrete of the post-cast strip reaches the strength, so that the method achieves the effect of water relief and pressure reduction, can effectively reduce the probability of floating and water leakage of the basement bottom plate post-cast strip, obviously improves the quality of the basement bottom plate concrete and the floor, solves the construction problem of water leakage of the basement bottom plate post-cast strip, greatly reduces the probability and the workload of later-stage plugging and maintenance, has simple operation, flexible construction, safety and reliability, properly increases the working procedures on the basis of the original post-cast strip, effectively reduces the probability of water leakage of the basement bottom plate, and greatly reduces the probability and the workload of later-stage plugging and maintenance, the method is suitable for popularization and application, is particularly suitable for post-cast strips of the basement floor of industrial and civil building engineering, and has particularly remarkable economic benefit for projects with higher underground water level.
Drawings
FIG. 1 is a schematic structural diagram of the apparatus of the present invention.
In the figure: 1-pressure relief steel sleeve, 2-water stop, 3-water stop steel plate, 4-fine stone concrete layer, 5-drainage plate, 501-water diversion opening, 6-stone layer, 7-notch, 8-water diversion pipe, 9-post-cast strip concrete layer, 901-surface layer steel bar, 902-bottom layer steel bar and 10-fine stone concrete.
Detailed Description
The invention is further described with reference to the accompanying drawings, but the scope of the invention is not limited thereto:
as shown in figure 1, the device for preventing the seepage of the post-cast strip of the basement bottom plate comprises a stone layer 6 and a drainage plate 5 which are paved on the basement bottom plate from bottom to top, wherein the thickness of the stone layer 6 is 35mm-50mm, the particle size of the stone is 10-25mm, a water diversion port 501 is formed in the drainage plate 5, fine stone concrete with the thickness of 10mm is poured in a small hole of the drainage plate 5 in a covering mode, the bottom of a pressure relief steel sleeve 1 is installed in the water diversion port 501 to be tightly matched with the water diversion port, a water diversion pipe 8 is arranged in the pressure relief steel sleeve 1, the bottom of the water diversion pipe 8 is installed in the stone layer 6, a fine stone concrete layer 4 is arranged on the upper surface of the drainage plate 5, a foundation concrete layer and a post-cast strip concrete layer 9 are arranged on the fine stone concrete layer 4, the pressure relief concrete 10 is filled between the water diversion pipe 8 and the.
Six notches 7 are uniformly formed in the bottom of the pressure relief steel sleeve 1, and a steel wire mesh is bound and arranged at the bottom of the pressure relief steel sleeve 1 through the notches 7, so that stones of a stone layer 6 are prevented from entering the pressure relief steel sleeve 1.
The drainage plate 5 adopts an FSH25 cross drainage plate, the height is 25mm, the unit mass is 1050g/m, and the elongation at break is more than or equal to 25%; the water conduit 8 adopts a DN40 galvanized pipe, and the upper opening of the water conduit 8 extends out of the upper surface of the post-cast strip concrete layer 9 by 45-55 mm; the outer wall of the water conduit 8 and the inner wall of the pressure relief steel sleeve 1 are respectively welded with a water stop sheet 2; the outer wall of the pressure relief steel sleeve 1 is welded with a water stop steel plate 3; the welding positions of the water stop sheet 2 and the water stop steel plate 3 are both positioned between the surface layer steel bar 901 and the bottom layer steel bar 902 of the post-cast strip.
As shown in figure 1, the construction method for solving the seepage of the post-cast strip of the basement floor by the pre-buried sleeve pressure guide method comprises the following steps of laying stones and drainage plates, positioning pressure-relief steel sleeves, pouring fine stone concrete, binding reinforcing steel bars of the basement floor, pouring concrete of the basement floor, pouring post-cast strip concrete, burying the water conduit and closing gaps, plugging the water conduit and constructing a terrace, and comprises the following specific steps:
1) before the drainage plate 5 is paved with the stones and the drainage plate, the stones are paved on a basement bottom plate as a filter layer, the diameter of the stones is 10-25mm, the thickness is preferably 35-50 mm, the stones do not contain silt, water circulation at the lower part of the drainage plate 5 is ensured, a hole is cut in the middle of the drainage plate 5 and is used as a water diversion port 501 of a pressure relief steel sleeve, 10mm fine stone concrete is covered and poured in the small hole of the drainage plate 5, no soil, yellow sand and the like enter the lower part of the drainage plate 5 in the paving process of the drainage plate 5, and the smooth space of the drainage plate 5 is ensured;
2) the outer wall of a pressure relief steel sleeve positioning pressure relief steel sleeve 1 is provided with a water stop steel plate 3, the bottom of the pressure relief steel sleeve 1 is uniformly provided with six notches 7 and bound with a steel wire net, then the bottom of the pressure relief steel sleeve 1 extends into a water diversion port 501 of a drainage plate 5, the pressure relief steel sleeve 1 is positioned below the surface of the drainage plate 5, the blockage of the pressure relief steel sleeve 1 caused by later concrete pouring is avoided, so as to ensure the smooth water flow in the pressure relief steel sleeve, the pressure relief steel sleeve 1 is reserved at intervals of about 15m at a post-pouring zone, the distance deviation is controlled within 1m, the allowable deviation of the height difference of the water stop steel plate 3 on the pressure relief steel sleeve 1 is less than 10mm, when the invention is implemented, the positioning steel bar is adopted for welding and positioning, the lower port of the pressure relief steel sleeve 1 is ensured to extend into the drainage plate 5 to a pressure relief stone laying position, and the fine stone concrete plugging is applied, the method has the advantages that slurry leakage during concrete pouring is avoided, the welding position of the outer water stop plate is located between the pressure relief steel sleeve and the middle lower part of the foundation bottom plate, the welding position of the inner water stop plate is located between the pressure relief steel sleeve and the middle part of the foundation bottom plate, the welding form is full welding, slag is timely removed in the welding process, the surface of a welding seam is smooth, a welding pit is filled, and complete sealing between the galvanized water conduit and the water stop plate is ensured;
3) the fine stone concrete is poured on the drainage plate 5, and the strength of the fine stone concrete is higher than that of the basement floor by one grade;
4) binding the reinforcing steel bars of the foundation slab to reinforcing steel bars of the foundation slab comprises surface reinforcing steel bars 901 and bottom reinforcing steel bars 902, binding the bottom reinforcing steel bars 902 at first, binding a square reinforcement cage outside a pressure relief steel sleeve 1, binding surface reinforcing steel bars 901, binding a square reinforcement cage outside the pressure relief steel sleeve 1, and positioning a water stop steel plate 3 between the bottom reinforcing steel bars 902 and the surface reinforcing steel bars 901;
5) concrete pouring of foundation slab
6) Before post-cast strip concrete pouring, temporarily sealing the upper opening of the pressure relief steel sleeve 1 by using an adhesive tape, then performing concrete pouring, chiseling the edges of the post-cast strip, cleaning reinforcing steel bars, adopting micro-expansion fine stone concrete with the grade higher than that of the foundation bottom plate concrete by one grade for the post-cast strip concrete, performing self-inspection in a team before the post-cast strip concrete pouring, and then checking by a supervision engineer to be qualified and pouring; in the pouring process, a vibrating rod is obliquely inserted below the water stop steel plate 3, the vibrating duration time is required to enable the concrete surface to generate floating slurry without bubbles until the concrete does not sink, the distance of the moving position is not more than 400mm, the vibration is not leaked or avoided, and secondary re-vibration is carried out before initial setting;
7) embedding and gap sealing of the water conduit, cutting a pressure relief steel sleeve 1 higher than concrete of a foundation bottom plate to be flush with the bottom plate, embedding a water conduit 8, arranging a water stop sheet 2 on the outer wall of the water conduit, positioning the water stop sheet 2 between a bottom layer steel bar 902 and a surface layer steel bar 901, extending the bottom of the water conduit 8 to the bottom of a stone layer 6, extending the upper opening of the water conduit 8 to be about 50mm above the concrete surface of a post-cast strip, and filling and compacting a gap between the water conduit 8 and the pressure relief steel sleeve 1 by micro-expansion fine stone concrete;
8) after the post-cast strip concrete reaches the strength, the water conduit is plugged and the terrace construction is carried out by adopting the threaded pipe cap to plug the water conduit 8.
By adopting the technology, the invention has the following beneficial effects:
1. social benefits
1) The construction method for solving the leakage of the post-cast strip of the basement bottom plate by adopting the pre-buried sleeve pressure guiding method has the advantages that the construction method is adopted, the key technical problem of the leakage of the basement bottom plate is efficiently solved, the problem of the leakage of the post-cast strip is solved at one time, the difficulty of later-stage floor construction is greatly reduced, and meanwhile, the construction quality of the floor is guaranteed;
2) the basement space with greatly reduced water leakage probability enables the functions of the underground space of the owner to be free from being influenced, and effectively reduces the complaint probability of the owner on the water leakage of the basement, thereby generating wide social benefits;
3) the construction method for solving the leakage of the post-cast strip of the basement floor by adopting the pre-buried sleeve guide pressing method is used for constructing the sealing of the post-cast strip of the basement floor, and the sealing effect is achieved: low cost, good appearance and good quality.
2. Economic benefits
From the aspects of integral construction and later maintenance, the invention reduces a lot of costs for grouting plugging and later maintenance even compensation, and has greater advantages in manufacturing cost compared with the traditional post-cast strip closed construction. According to the construction method, the construction cost of the post-cast strip is increased by about 29.9 yuan/m on the basis of the original traditional construction cost, a summary table of the construction cost required by a pressure relief water diversion part is shown in the following table 1, the maintenance cost of a common post-cast strip is about 207 yuan/m, the post-cast strip with 90 meters of extension is taken as an example, the water leakage proportion of the post-cast strip in the traditional construction method is about 39% (the result of investigation in the industry), and the specific cost comparison is shown in the table 2.
TABLE 1 summary table of the cost required by a pressure relief diversion place of the present invention
TABLE 2 cost comparison of two construction methods
In conclusion, the construction method can save about 63% of the construction cost (the cost of large-area bottom plate water leakage and terrace cracking is not counted).
3. Environmental protection benefit
The pre-buried sleeve pressure guide method solves the leakage construction method of the post-cast strip of the basement floor, saves the materials for later-stage leakage stoppage and maintenance in a large proportion, most of the leakage stoppage and maintenance materials can pollute the environment to different degrees, and secondary pollution of the basement space caused by leakage water maintenance is avoided. Therefore, the method is also significant for environmental protection.
Application example 1
The project A is started in 2014 at 2 months, is located in the Yuhangzhong region, and has a total building area of 127366.17m2The frame shear wall structure is a one-storey underground, 18-24-storey above-ground residential buildings, and the post-cast strip of the basement floor is about 2645 m. The basement floor post-cast strip is sealed by applying a pre-buried sleeve pipe guide pressing method to solve the leakage construction method of the basement floor post-cast strip, and the basement floor has no obvious water leakage phenomenon after 6 months of basement floor construction.
Application example 2
The project B is started in 2015 at 9 months, is located in the region of Yun Hangzhou, has a total building area of 78580.39m2 and a basement building area of 41018.12 m2The length of the post-pouring belt of the basement bottom plate is about 752 m. The basement floor post-cast strip is sealed by applying a pre-buried sleeve pipe guide pressing method to solve the leakage construction method of the basement floor post-cast strip, and the basement floor has no obvious water leakage phenomenon after 6 months of basement floor construction.
Claims (6)
1. The device for preventing the seepage of the post-cast strip of the basement floor comprises a stone layer (6) and a drainage plate (5) which are paved on the basement floor from bottom to top, and is characterized in that a water diversion port (501) is formed in the drainage plate (5), the bottom of a pressure relief steel sleeve (1) is installed in the water diversion port (501) and is tightly matched with the water diversion port, a water diversion pipe (8) is arranged in the pressure relief steel sleeve (1), the bottom of the water diversion pipe (8) is installed in the stone layer (6), a fine stone concrete layer (4) is arranged on the upper surface of the drainage plate (5), a foundation concrete layer and a post-cast strip concrete layer (9) are arranged on the fine stone concrete layer (4), fine stone concrete (10) is filled between the water diversion pipe (8) and the pressure relief steel sleeve (1), and an end cap is arranged at;
six notches (7) are uniformly formed in the bottom of the pressure relief steel sleeve (1), and a steel wire mesh is bound to the bottom of the pressure relief steel sleeve (1) through the notches (7); the water conduit (8) adopts a DN40 galvanized pipe, and the upper opening of the water conduit (8) extends out of the upper surface of the post-cast strip concrete layer (9) by 45-55 mm; the outer wall of the water conduit (8) and the inner wall of the pressure relief steel sleeve (1) are respectively welded with a water stop sheet (2); a water stop steel plate (3) is welded on the outer wall of the pressure relief steel sleeve (1); and the welding positions of the water stop sheet (2) and the water stop steel plate (3) are positioned between the surface layer reinforcing steel bar (901) and the bottom layer reinforcing steel bar (902) of the post-cast strip.
2. The device for preventing seepage of the post-cast strip of a bottom plate of a basement according to claim 1, characterized in that the thickness of the stone layer (6) is 35mm-50mm, and the grain size of the stone is 10-25 mm.
3. The device for preventing the seepage of the post-cast strip of the floor of the underground chamber according to the claim 1 is characterized in that the small holes of the drainage plate (5) are covered and poured with 10mm thick fine stone concrete.
4. The device for preventing the seepage of the post-cast strip of the floor of the underground chamber according to claim 1, characterized in that the drainage plate (5) adopts a cross drainage plate of FSH25, the height is 25mm, the unit mass is 1050g/m, and the elongation at break is more than or equal to 25%.
5. The construction method for preventing the seepage of the post-cast strip of the underground chamber floor based on the device of claim 1 is characterized by comprising the steps of laying stones and drainage plates, positioning pressure-relief steel sleeves, pouring fine stone concrete, binding reinforcing steel bars of a foundation floor, pouring concrete of the post-cast strip, burying water guide pipes and closing gaps, plugging the water guide pipes and constructing floors.
6. The construction method for preventing the leakage of the post-cast strip of the underground chamber floor as claimed in claim 5, is characterized by comprising the following steps:
1) before the drainage plate (5) is paved with the stones and the drainage plate, the stones are paved on the basement bottom plate as a filter layer to ensure that water circulates at the lower part of the drainage plate (5), a hole is cut in the middle of the drainage plate (5) to serve as a water diversion port (501) of a pressure relief steel sleeve, and 10mm fine stone concrete is poured into the small hole of the drainage plate (5) in a covering manner;
2) the bottom of the pressure relief steel sleeve positioning pressure relief steel sleeve (1) is uniformly provided with six notches (7) and bound with a steel wire mesh, then the bottom of the pressure relief steel sleeve (1) extends into a water diversion port (501) of a drainage plate (5), and the pressure relief steel sleeve (1) is positioned below the surface of the drainage plate (5);
3) the fine stone concrete is poured on the drainage plate (5), and the strength of the fine stone concrete is higher than that of the basement bottom plate concrete by one grade;
4) the foundation slab steel bar binding method comprises the steps that foundation slab steel bar binding is carried out on foundation slab steel bars, wherein the foundation slab steel bars comprise surface layer steel bars (901) and bottom layer steel bars (902), the bottom layer steel bars (902) are bound firstly, meanwhile, square steel bar cages are bound on the outer sides of pressure relief steel sleeves (1), then, the surface layer steel bars (901) are bound, and then, the square steel bar cages are bound on the outer sides of the pressure relief steel sleeves;
5) concrete pouring of foundation slab
6) Before post-cast strip concrete pouring, temporarily sealing the upper opening of a pressure relief steel sleeve (1) by using an adhesive tape, then performing concrete pouring, chiseling the edge of the post-cast strip and cleaning reinforcing steel bars, wherein the post-cast strip concrete adopts micro-expansion fine stone concrete with the grade higher than that of the foundation bottom plate concrete by one grade, and in the pouring process, a vibrating rod is obliquely inserted below a water stop steel plate and performs secondary re-vibration before initial setting;
7) embedding and gap sealing of the water conduit, cutting a pressure relief steel sleeve (1) higher than concrete of a foundation bottom plate to be flush with the bottom plate, embedding the water conduit (8), wherein the bottom of the water conduit (8) extends to the bottom of a stone layer (6), and filling and compacting a gap between the water conduit (8) and the pressure relief steel sleeve (1) by micro-expansion fine stone concrete;
8) after the post-cast strip concrete reaches the strength, the water conduit is plugged and the terrace construction is carried out by plugging the water conduit (8) by adopting the threaded pipe cap.
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| CN109750691A (en) * | 2019-01-24 | 2019-05-14 | 中建八局第三建设有限公司 | A kind of basement post-pouring zone underdrain method for constructing terrace |
| CN111764397A (en) * | 2020-05-28 | 2020-10-13 | 浙江土工岩土科技有限公司 | Underground diaphragm wall plugging device and method |
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| KR100719356B1 (en) * | 2005-07-04 | 2007-05-18 | 주식회사 도화구조 | Plumbing for Draining Underground Water and Controlled De-watering System with Target Water Level Using the Plumbing |
| CN201212156Y (en) * | 2008-06-17 | 2009-03-25 | 朱邃科 | Interception and drainage system of basement engineering |
| CN101748753A (en) * | 2008-12-06 | 2010-06-23 | 广西建工集团第五建筑工程有限责任公司 | Plugging construction method of reserved opening of basement soleplate and tower crane foundation and post-pouring zone reserved opening |
| CN204343342U (en) * | 2014-12-10 | 2015-05-20 | 奥意建筑工程设计有限公司 | A kind of basement floor constructions with spilled water hole |
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