CN114892724A - Anti pressure reduction system that floats of basement - Google Patents
Anti pressure reduction system that floats of basement Download PDFInfo
- Publication number
- CN114892724A CN114892724A CN202210447594.5A CN202210447594A CN114892724A CN 114892724 A CN114892724 A CN 114892724A CN 202210447594 A CN202210447594 A CN 202210447594A CN 114892724 A CN114892724 A CN 114892724A
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- Prior art keywords
- basement
- water
- ditch
- drainage
- post
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000009467 reduction Effects 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000004575 stone Substances 0.000 claims abstract description 26
- 230000006837 decompression Effects 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 9
- 238000002955 isolation Methods 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 24
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 210000002489 tectorial membrane Anatomy 0.000 description 1
Images
Classifications
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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
- E02D31/10—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 soil pressure or hydraulic pressure
- E02D31/12—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 soil pressure or hydraulic pressure against upward hydraulic pressure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- 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
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention discloses a basement anti-floating decompression system, which comprises: the indoor water drainage part is provided with a blind ditch arranged below the advanced water stop post-cast strip, two sides of the blind ditch are impervious concrete cushion layers, and a stone water filtering layer, a non-woven fabric isolating layer and a post-cast strip cushion layer are sequentially arranged in the blind ditch from bottom to top; the outdoor dewatering part is provided with a drainage ditch and a plurality of dewatering wells communicated with the drainage ditch; the communicating part is arranged in the raft retaining wall and used for communicating the drainage ditch with the blind ditch extending to the outer wall of the basement. According to the invention, a 'decompression drainage' mode is adopted, the advanced water-stop post-pouring belt is constructed around the water-stop belt, the blind ditch system is arranged below the advanced water-stop post-pouring belt, and is communicated with the drainage facility at the outer side of the basement, so that the floating pressure of underground water in a water-rich area on the basement structure can be effectively eliminated, the phenomena of leakage and the like caused by the pressure of the underground water on the basement structure are reduced, and the huge harm of the floating pressure on the foundation structure is further eliminated.
Description
Technical Field
The invention relates to the technical field of basement construction, in particular to an anti-floating decompression system for a basement.
Background
The basement development and construction are emerging in a large quantity, engineering accidents caused by the destruction of the water buoyancy of the basement are more and more, in actual engineering, the design water level of underground water is uncertain, the uplift force of the uplift component is possibly insufficient to balance the buoyancy of the underground water, and further catastrophic consequences are brought to make the anti-floating problem especially prominent, so that more attention of structural designers is brought. The traditional anti-floating design adopts a hard-shouldering design mode of 'weight pressing' and 'uplift', the bearing capacity of a basement top plate needs to be increased, or anchor rod construction with great damage to rock mass is adopted, the construction difficulty is high, the construction period is long, and the construction cost is high.
In recent years, the water level of underground water is mostly reduced by adopting a drainage and pressure relief method, namely, a hole connected to a pressure-bearing water layer is formed in the bottom surface of a basement floor post-cast strip, a water seepage pipe and a steel sleeve for protecting the water seepage pipe penetrate through the hole, one end of the water seepage pipe and one end of the steel sleeve are both connected to the pressure-bearing water layer, and the other ends of the water seepage pipe and the steel sleeve are both higher than the bottom surface of the post-cast strip, so that water in the pressure-bearing water layer is led out, and the water pressure in the pressure-bearing water layer is reduced. Compared with the traditional hard-lever design, the construction scheme is simplified, the construction difficulty is reduced, and the construction cost is lower. However, according to the standard requirements, the post-cast strip must be poured after the main body is finished, and for the part with the function of confined water, because the water pressure is high, if the pressure of the confined water is not reduced during the construction, the dead weight of the impermeable layer at the post-cast strip can not bear the water pressure of the confined water below the impermeable layer, and then the soil layer at the post-cast strip is raised, so that the construction quality of the basement floor post-cast strip is difficult to ensure. Secondly, because the infiltration pipe directly links to each other with post-cast strip bottom plate, when groundwater level is higher, very easy contact basement concrete bottom plate bed course to cause the harmful effects to the structural quality of concrete.
Disclosure of Invention
In order to solve the problems, the invention provides a basement anti-floating pressure reduction system which is convenient, rapid, safe and reliable in construction, and the technical scheme can be specifically adopted as follows:
the invention relates to a basement anti-floating decompression system, which comprises
The indoor water drainage part is provided with a blind ditch arranged below the advanced water stop post-cast strip, two sides of the blind ditch are impervious concrete cushion layers, and a stone water filtering layer, a non-woven fabric isolating layer and a post-cast strip cushion layer are sequentially arranged in the blind ditch from bottom to top;
the outdoor dewatering part is provided with a drainage ditch and a plurality of dewatering wells communicated with the drainage ditch;
the communicating part is arranged in the raft retaining wall and used for communicating the drainage ditch with the blind ditch extending to the outer wall of the basement.
In order to improve structural stability, the cross section of the blind ditch is of an inverted trapezoidal structure, and two sides of the top surface of the blind ditch are provided with outer edges of a planar structure.
Furthermore, the stone water filtering layer is composed of stones with the particle size of 5-20mm and the volume of the stones is not changed when the stones meet water.
The non-woven fabrics isolation layer is including setting up the first section between stone drainage layer and post-cast strip bed course to and set up the second section between post-cast strip bed course and impervious concrete bed course, just the going up of second section is higher than post-cast strip bed course top surface 300 mm.
In order to improve the water stopping effect, a secondary artificial anti-seepage treatment layer is arranged at the joint of the post-cast strip cushion layer and the anti-seepage concrete cushion layer.
The drainage ditch and the dewatering well are both of brick building or concrete pouring structures, and the bottom surface of the drainage ditch extends towards the sloping direction of the dewatering well.
The inner wall of the drainage ditch is provided with a waterproof mortar layer, and water filtering stones are filled in the drainage ditch; the dewatering wells are arranged in the drainage ditch at intervals.
The raft retaining wall is arranged on the outer side of the basement outer wall, the communication part is a pre-buried straight pipe arranged in the raft retaining wall, one end of the pre-buried straight pipe corresponds to the stone water filtering layer, and the other end corresponds to the drainage ditch.
In order to prevent blockage, two ends of each embedded straight pipe are provided with a steel bar net piece or a stainless steel net piece.
The advanced water stop post-cast strip is arranged below the post-cast strip pouring position.
The anti-floating decompression system of the basement adopts a decompression drainage mode, an advanced water stop post-pouring belt is constructed around the water stop belt, a blind ditch system is arranged below the advanced water stop post-pouring belt, and the blind ditch system is communicated with a drainage facility outside the basement, so that the floating pressure of underground water in a water-rich area on the basement structure can be effectively eliminated, the phenomena of leakage and the like caused by the pressure of the underground water on the basement structure are reduced, and the huge harm of the floating pressure on the basement structure is further eliminated.
Compared with the prior art, the invention has the following advantages:
1) the construction is synchronous with the advanced water stop post-cast strip, and is finished before the bottom plate cushion layer is laid, so that the construction with the foundation and the main body is avoided, the waterproof effect of the basement bottom plate and the shear wall can be ensured, the functions of precipitation and pressure reduction can be fully exerted when the post-cast strip is constructed in the later stage, and accidents caused by too fast rising of underground water level in the rainwater stage can be prevented;
2) the underground water level can be controlled below the advanced water stop post-pouring zone, which is reduced by at least 400mm compared with the traditional water level, so that the damage of the concrete bottom plate of the basement caused by contacting with the underground water is effectively avoided, and the safety of the basement is ensured;
3) the invention has the advantages of easy construction, short construction period, low construction cost and good economic benefit.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a sectional view (part) taken along line a-a in fig. 1.
Fig. 3 is a sectional view taken along line B-B in fig. 2.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific construction processes are given, but the scope of the present invention is not limited to the following embodiments.
The anti-floating decompression system for the basement comprises an indoor water drainage part, an outdoor water drainage part and a communication part for communicating the indoor water drainage part and the outdoor water drainage part.
Specifically, as shown in fig. 1 to 3, the indoor water drainage portion is disposed below the leading water-stop post-cast strip M, and includes mutually cross-linked blind ditches 1 disposed along the direction of the leading water-stop post-cast strip M, the cross section of each blind ditch 1 is of an inverted trapezoidal structure, and two sides of the top surface are outer edges of a planar structure. Impervious concrete cushion 2 that C20 concrete constitutes has been pour to the inside wall of french drain 1, has set gradually stone drainage layer 3, non-woven fabrics isolation layer 4 and post-cast strip cushion 5 in the french drain from bottom to top. The stone water filtering layer 3 is not suitable for the stones such as clay shale and the like which change in volume when meeting water, and the stones such as quartz rock and the like which do not change in volume when meeting water for a long time are selected. The stone water filtering layer 3 can play a role in filtering the silt carried in the underground pressure-bearing water, and prevent the pressure reducing system from being blocked. Non-woven fabrics isolation layer 4 is used for waterproofly, the non-woven fabrics surface is handled through the tectorial membrane, can avoid groundwater pressure-bearing water to contact bottom plate ground, it is including setting up the first section between stone drainage layer 3 and post-cast strip bed course 5, and set up the second section between post-cast strip bed course 5 and impervious concrete bed course 2, above-mentioned first section and second section set up in succession, and the second section go up along being higher than 5 top surfaces 300mm of post-cast strip bed course, it is at construction joint department turn-ups, can make effective anti seepage of bed course construction joint department. The post-cast strip cushion layer 5 is located in an area surrounded by the non-woven fabric isolation layer 4 and is of an impermeable structure, so that underground water can be effectively prevented from contacting with a basement bottom plate. Furthermore, concrete is required to be poured at the joint of the post-cast strip cushion layer 5 and the impervious concrete cushion layer 2 to form a secondary artificial impervious treatment layer.
And after the construction of the blind ditch system is finished, constructing an advanced water-stopping post-cast strip M above the post-cast strip cushion layer 5. The advanced water stop post-cast strip M is distributed at the bottom of the post-cast strip N pouring position. Because the construction of the blind ditch system and the advanced water stop post-cast strip M is earlier than that of the post-cast strip N, namely before the post-cast strip N is constructed, the waterproof system is constructed completely, and the problem that the concrete pouring quality caused by water seepage of a construction station is not critical during the post-cast strip N construction can be fully avoided.
The outdoor precipitation part comprises a drainage ditch 7 constructed around the outer wall 6 of the basement, and the drainage ditch 7 is communicated with a plurality of precipitation wells 8. In general, the drainage ditch 7 and the dewatering wells 8 are both of a brick or concrete pouring structure, the elevation of the bottom of the drainage ditch 7 is lower than that of the blind ditch 1, the dewatering wells 8 are arranged at intervals in the drainage ditch 7, and the inner diameter of each dewatering well 8 is 1800mm and the clear depth is 2000 mm. In order to smoothly drain the drainage ditch 7, the bottom surface of the drainage ditch 7 extends in a slope direction toward the dewatering well 8 communicated therewith. Be provided with waterproof mortar layer on the inner wall of above-mentioned escape canal 7, then pack in the escape canal 7 and have drainage stone 9, can filter the parcel of underground pressure-bearing aquatic and hold silt, prevent to take place to block up.
The communicating part is used for communicating the indoor water conveying part and the outdoor water reducing part. Specifically, the blind ditches 1 of the indoor water drainage part are mutually cross-linked to form a net shape, and a plurality of water drainage tail ends extending to the outer wall 6 of the basement are branched; the tail end of each drainage is respectively communicated with a drainage ditch 7 of the outdoor dewatering part through an embedded straight pipe 10 arranged in a raft retaining wall 12. The raft retaining wall 12 is arranged on the outer side of the basement outer wall 6, one end of the embedded straight pipe 10 in the raft retaining wall corresponds to the stone water filtering layer 3 of the blind ditch 1, and the other end of the embedded straight pipe corresponds to the water filtering stones 9 in the drainage ditch 7. Further, reinforcing mesh sheets 11 (or stainless steel mesh sheets) are further installed at two ends of each embedded straight pipe 10 and used for filtering impurities and preventing the embedded straight pipes 10 from being blocked. When the underground water level in the underground chamber rises to exceed the stone water filtering layer 3, the indoor underground water flows into the embedded straight pipe 10 along the blind ditch 1 and then is discharged to the outdoor drainage ditch 7, the water in the drainage ditch 7 flows to each dewatering well 8, and the water in the dewatering wells 8 is periodically pumped away by a pump. By the method, the underground water elevation in the dynamic basement is controlled, and the floating pressure of the underground water on the building is reduced or eliminated.
It should be noted that in the description of the present invention, terms of orientation or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not 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.
Claims (10)
1. The utility model provides a basement anti decompression system that floats which characterized in that: comprises that
The indoor water drainage part is provided with a blind ditch arranged below the advanced water stop post-cast strip, two sides of the blind ditch are impervious concrete cushion layers, and a stone water filtering layer, a non-woven fabric isolating layer and a post-cast strip cushion layer are sequentially arranged in the blind ditch from bottom to top;
the outdoor dewatering part is provided with a drainage ditch and a plurality of dewatering wells communicated with the drainage ditch;
the communicating part is arranged in the raft retaining wall and used for communicating the drainage ditch with the blind ditch extending to the outer wall of the basement.
2. The anti-floating decompression system for the basement according to claim 1, wherein: the cross section of the blind ditch is of an inverted trapezoidal structure, and the two sides of the top surface of the blind ditch are provided with outer edges of a plane structure.
3. The anti-floating decompression system for the basement according to claim 2, wherein: the stone water filtering layer is composed of stones with the particle size of 5-20mm and the volume of stones is not changed when meeting water.
4. The anti-floating decompression system for the basement of claim 3, wherein: the non-woven fabrics isolation layer is including setting up the first section between stone drainage layer and post-cast strip bed course to and set up the second section between post-cast strip bed course and impervious concrete bed course, just the going up of second section is higher than post-cast strip bed course top surface 300 mm.
5. The anti-floating decompression system for the basement of claim 4, wherein: and a secondary artificial anti-seepage treatment layer is arranged at the joint of the post-cast strip cushion layer and the anti-seepage concrete cushion layer.
6. The anti-floating decompression system for the basement according to claim 1, wherein: the drainage ditch and the dewatering well are both of brick building or concrete pouring structures, and the bottom surface of the drainage ditch extends towards the sloping direction of the dewatering well.
7. The anti-floating decompression system for the basement according to claim 6, wherein: the inner wall of the drainage ditch is provided with a waterproof mortar layer, and water filtering stones are filled in the drainage ditch; the dewatering wells are arranged in the drainage ditch at intervals.
8. The anti-floating decompression system for the basement according to claim 1, wherein: the raft retaining wall is arranged on the outer side of the basement outer wall, the communication part is a pre-buried straight pipe arranged in the raft retaining wall, one end of the pre-buried straight pipe corresponds to the stone water filtering layer, and the other end corresponds to the drainage ditch.
9. The anti-floating decompression system of the basement according to claim 8, wherein: and reinforcing steel bar meshes or stainless steel meshes are arranged at two ends of each embedded straight pipe.
10. The anti-floating decompression system for the basement according to claim 1, wherein: the advanced water stop post-cast strip is arranged below the post-cast strip pouring position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210447594.5A CN114892724A (en) | 2022-04-25 | 2022-04-25 | Anti pressure reduction system that floats of basement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210447594.5A CN114892724A (en) | 2022-04-25 | 2022-04-25 | Anti pressure reduction system that floats of basement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114892724A true CN114892724A (en) | 2022-08-12 |
Family
ID=82718663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210447594.5A Withdrawn CN114892724A (en) | 2022-04-25 | 2022-04-25 | Anti pressure reduction system that floats of basement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114892724A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060005466A (en) * | 2004-07-13 | 2006-01-18 | 엄기형 | Method of drain construction for basement |
| CN102720217A (en) * | 2012-06-12 | 2012-10-10 | 浙江城建建设集团有限公司 | Basement watertightness structure and construction method thereof |
| CN205421500U (en) * | 2015-11-27 | 2016-08-03 | 中国一冶集团有限公司 | Basement french drain is dredged and is fallen drainage device |
| CN114134920A (en) * | 2021-11-19 | 2022-03-04 | 珠海华发人居生活研究院有限公司 | Post-cast strip advanced sealing construction method |
-
2022
- 2022-04-25 CN CN202210447594.5A patent/CN114892724A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060005466A (en) * | 2004-07-13 | 2006-01-18 | 엄기형 | Method of drain construction for basement |
| CN102720217A (en) * | 2012-06-12 | 2012-10-10 | 浙江城建建设集团有限公司 | Basement watertightness structure and construction method thereof |
| CN205421500U (en) * | 2015-11-27 | 2016-08-03 | 中国一冶集团有限公司 | Basement french drain is dredged and is fallen drainage device |
| CN114134920A (en) * | 2021-11-19 | 2022-03-04 | 珠海华发人居生活研究院有限公司 | Post-cast strip advanced sealing construction method |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220812 |
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| WW01 | Invention patent application withdrawn after publication |