CN109930632B - Basement groundwater self-balancing anti-floating system based on bedrock shallow buried slope area - Google Patents
Basement groundwater self-balancing anti-floating system based on bedrock shallow buried slope area Download PDFInfo
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- CN109930632B CN109930632B CN201910151549.3A CN201910151549A CN109930632B CN 109930632 B CN109930632 B CN 109930632B CN 201910151549 A CN201910151549 A CN 201910151549A CN 109930632 B CN109930632 B CN 109930632B
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- 239000003673 groundwater Substances 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000002689 soil Substances 0.000 claims abstract description 27
- 239000012466 permeate Substances 0.000 claims abstract description 6
- 239000003337 fertilizer Substances 0.000 claims description 32
- 239000004576 sand Substances 0.000 claims description 16
- 239000004575 stone Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 7
- 239000004746 geotextile Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The invention provides a basement groundwater self-balancing anti-floating system based on a bedrock shallow buried slope region, which is suitable for the bedrock shallow buried slope region, and the basement groundwater of the main drainage anti-floating basement is drained to the second blind ditch by utilizing the height difference of the first blind ditch and the second blind ditch through a water permeable pad, the first blind ditch and the second blind ditch so as to permeate into a fourth sand-line soil layer or a filling layer, and the characteristic that the fourth sand-line soil layer or the filling layer has a large permeability coefficient and can quickly absorb water is utilized as a drainage region of groundwater. The fourth system soil layer has high porosity and good permeability, the permeability coefficient is 10-20m/d, and the groundwater is permeated and diffused in the fourth system soil layer and cannot cause obvious rise of the soil layer water level, so that the basement groundwater pressure of the main drainage anti-floating basement is not more than 20kpa, the anti-floating requirement of the basement can be realized by the self weight of the basement, the drainage and the supply balance of the groundwater are realized, and the environmental protection is facilitated.
Description
Technical Field
The invention belongs to the technical field of drainage anti-floating, and particularly relates to a basement groundwater self-balancing anti-floating system based on bedrock shallow buried slope areas.
Background
The underground water in the shallow buried region of the bedrock has the characteristics of high water level, small water quantity, large gradient change of the underground water and pulse distribution, the permeability coefficient of the strongly weathered bedrock is generally smaller than 0.5m/d according to geotechnical engineering investigation experience, pumping test and the like, and the medium weathered bedrock and the slightly weathered bedrock are in a watertight state when cracks do not develop, and the underground water is mainly distributed in the cracks of the bedrock and is pulse-distributed and uneven. According to experience after foundation pit excavation of bedrock, groundwater after foundation pit excavation is mostly self-dissipated under the condition of natural evaporation, and a substrate is in a wet state. For a basement substrate with an area of 1 ten thousand square meters, when the side wall and the substrate of the foundation pit are bedrock, after the foundation pit is excavated, the daily water inflow is about20-40m 3 /d。
The anti-floating design water level provided by the usual investigation unit is: the upper part of the slope is 1.5-2.0 meters below the outdoor plateau, the anti-floating water level of the basement below the slope is the historical highest water level of the ground water of the rock and soil layer, and the middle part of the slope is calculated by adopting a linear difference calculation method. The self weight of the underground room is difficult to meet the design requirement of building anti-floating. If the conventional anchor rod anti-floating measures are adopted, the anti-floating anchor rods are large in arrangement amount, high in construction difficulty and high in cost, and the service life of the anti-floating anchor rods is still to be verified at present. At present, a water collecting groove is arranged below a foundation slab in the prior art, and underground water is drained to municipal pipelines from the basement in a mechanical drainage or manual drainage mode after the underground water is collected; the precipitation anti-floating system adopting water collection to drain outwards has the advantages that the later maintenance amount of the pumping system is large, if the pumping system fails and can not work, and under the condition that maintainers find that the pumping system is not timely, the rising of the groundwater can increase the water pressure under the basement bottom plate, and the basement bottom plate is easy to crack and damage. In addition, the underground water environment is influenced by methods such as collecting underground water in a base and reducing the water level of the underground water in a mechanical method, and the like, so that the ground surface settlement is easily caused by continuous drainage of the underground water. In view of the above, it is necessary to provide a basement groundwater self-balancing anti-floating system based on bedrock shallow slope regions to solve the above problems.
Disclosure of Invention
Aiming at the technical problems, the invention provides a basement groundwater self-balancing anti-floating system based on bedrock shallow slope areas.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the basement groundwater self-balancing anti-floating system based on the bedrock shallow buried slope area comprises a main drainage anti-floating basement and an auxiliary drainage anti-floating basement, wherein the main drainage anti-floating basement and the auxiliary drainage anti-floating basement are arranged in a row; the main drainage anti-floating basement comprises an anti-floating foundation bottom plate and a main drainage anti-floating basement side wall, and the auxiliary drainage anti-floating basement comprises a drainage foundation bottom plate and an auxiliary drainage anti-floating basement side wall; the elevation of the anti-floating foundation baseplate is higher than that of the drainage foundation baseplate; the outer side of the side wall of the main drainage anti-floating basement is provided with a first foundation pit fertilizer groove, and the outer side of the side wall of the auxiliary drainage anti-floating basement is provided with a second foundation pit fertilizer groove; a water permeable pad is arranged below the anti-floating foundation bottom plate, a first blind ditch is arranged at the bottom of the first foundation pit fertilizer groove, and the water permeable pad is communicated with the first blind ditch so as to collect groundwater below the anti-floating foundation bottom plate to the first blind ditch through the water permeable pad;
the periphery in drainage foundation base plate's below and the fertile groove of second foundation ditch is fourth system sand soil layer or filler layer, the bottom in the fertile groove of second foundation ditch is provided with the second french drain, first french drain with the second french drain intercommunication just the elevation of first french drain is higher than the elevation of second french drain, in order to with the groundwater that first french drain was assembled is from flowing to the second french drain and then permeates to fourth system sand soil layer or filler layer.
Preferably, a concrete cushion layer and a waterproof film are arranged between the anti-floating foundation bottom plate and the water permeable cushion.
Preferably, the upper part of the first foundation pit fertilizer groove and the lower part of the first foundation pit fertilizer groove are both provided with water-resisting layers.
Preferably, the upper side of the water-proof layer and the lower side of the water-proof layer are both provided with reverse filtering geotextiles.
Preferably, the water-resistant layer is paved by clay.
Preferably, the top mark of the water-resisting layer at the upper part of the first foundation pit fertilizer groove is lower than the elevation of the bedrock interface.
Preferably, the water permeable pad is paved by broken stone or weathered sand.
Preferably, the first blind ditch and the second blind ditch are formed by filling embedded soft permeable pipes with broken stone or weathered sand.
Preferably, the bottom elevation of the first foundation pit fertilizer groove is higher than or equal to the elevation of the anti-floating waterproof level of the auxiliary drainage anti-floating basement.
The invention has the advantages and positive effects that:
1. the basement groundwater self-balancing anti-floating system based on the bedrock shallow buried slope area is suitable for the bedrock shallow buried slope area, and the groundwater of the main drainage anti-floating basement is drained to the second blind ditch by utilizing the height difference of the first blind ditch and the second blind ditch through the water permeable pad, the first blind ditch and the second blind ditch so as to permeate into the fourth sand-line soil layer or the filling layer, and the characteristic that the fourth sand-line soil layer or the filling layer has large permeability coefficient and can quickly absorb water is utilized as a drainage area of groundwater. The fourth system soil layer has high porosity and good permeability, the permeability coefficient is 10-20m/d, and the groundwater is permeated and diffused in the fourth system soil layer and cannot cause obvious rise of the soil layer water level, so that the basement groundwater pressure of the main drainage anti-floating basement is not more than 20kpa, the anti-floating requirement of the basement can be realized by the self weight of the basement, the drainage and the supply balance of the groundwater are realized, and the environmental protection is facilitated.
2. The basement groundwater self-balancing anti-floating system based on the bedrock shallow slope area is characterized in that a water-resisting layer is arranged on the upper part of the first foundation pit fertilizer groove and the lower part of the first foundation pit fertilizer groove, and reverse-filtering geotechnical cloth is arranged on the upper side of the water-resisting layer and the lower side of the water-resisting layer; the waterproof layer at the lower part isolates underwater infiltration of the soil in the first foundation pit fertilizer groove; the reverse filtration geotextile is paved on the upper side of the water-resisting layer at the lower part to prevent fine particle soil from losing; the upper water-resisting layer isolates surface water from infiltration into the first foundation pit fertilizer groove.
Drawings
FIG. 1 is a schematic diagram of a basement groundwater self-balancing anti-floating system based on bedrock shallow slope areas;
FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of B-B of FIG. 2;
in the figure: 1. a main drainage anti-floating basement; 11. an anti-floating foundation sole plate; 12. the side wall of the main drainage anti-floating basement; 13. a water permeable pad; 14. the first foundation pit fertilizer groove; 141. a first blind drain; 142. a water-resistant layer; 1421. reversely filtering geotextile; 15. a concrete cushion layer and a waterproof film; 2. an auxiliary drainage anti-floating basement; 21. a drainage foundation mat; 22. side walls of the auxiliary drainage anti-floating basement; 23. the second foundation pit fertilizer groove; 231. a second blind drain; 3. anti-floating waterproof level; 4. and (3) a bedrock interface.
Detailed Description
The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "inner", "outer", "upper", "lower", "front", "rear", etc. are based on the positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 3, a basement groundwater self-balancing anti-floating system based on a bedrock shallow buried slope area comprises a main drainage anti-floating basement 1 and an auxiliary drainage anti-floating basement 2, wherein the main drainage anti-floating basement 1 and the auxiliary drainage anti-floating basement 2 are arranged in a row; the main drainage anti-floating basement 1 comprises an anti-floating foundation bottom plate 11 and a main drainage anti-floating basement side wall 12, and the auxiliary drainage anti-floating basement 2 comprises a drainage foundation bottom plate 21 and an auxiliary drainage anti-floating basement side wall 22; the elevation of the anti-floating foundation bedplate 11 is higher than the elevation of the drainage foundation bedplate 21; the outer side of the side wall 12 of the main drainage anti-floating basement is provided with a first foundation pit fertilizer groove 14, the bottom elevation of the first foundation pit fertilizer groove 14 is higher than or equal to the elevation of an anti-floating waterproof level 4 (the anti-floating waterproof level 4 refers to the highest water level of an underground water layer with a dominant effect in the foundation laying depth during the operation of a building) of the auxiliary drainage anti-floating basement 2, and the outer side of the side wall 22 of the auxiliary drainage anti-floating basement is provided with a second foundation pit fertilizer groove 23; a water permeable pad 13 is arranged below the anti-floating foundation base plate 11, a concrete cushion layer and a waterproof film 15 are arranged between the anti-floating foundation base plate 11 and the water permeable pad 13, the water permeable pad is formed by paving materials with strong water permeability such as broken stone or weathered sand, and the thickness is 20 cm-50 cm; the bottom of the first foundation pit fertilizer groove 14 is provided with a first blind ditch 141, and the water permeable pad 13 is communicated with the first blind ditch 141 so as to collect the underground water below the anti-floating foundation bottom plate 11 to the first blind ditch 141 through the water permeable pad 13;
a fourth sand-based soil layer or a filling layer is arranged below the drainage foundation slab 21 and at the periphery of the second foundation pit fertilizer groove 23, a second blind ditch 231 is arranged at the bottom of the second foundation pit fertilizer groove 23, and the length of the second blind ditch 231, which is buried in the fourth sand-based soil layer or the filling layer, is at least 40m; the first blind drain 141 is communicated with the second blind drain 231, and the elevation of the first blind drain 141 is higher than the elevation of the second blind drain 231, so that the underground water collected by the first blind drain 141 flows to the second blind drain 231 to permeate into the fourth sand layer or the filling layer; the first blind ditch 141 and the second blind ditch 231 are formed by filling embedded soft permeable pipes with materials with strong water permeability such as broken stone or weathered sand, wherein the thickness of the broken stone or the weathered sand is 100cm, and the diameter of the soft permeable pipes is 20cm.
The basement groundwater self-balancing anti-floating system based on the bedrock shallow buried slope area is suitable for the bedrock shallow buried slope area, the groundwater of the main drainage anti-floating basement 1 is drained to the second blind ditch 231 by utilizing the height difference of the first blind ditch 141 and the second blind ditch 231 through the water permeable pad 13, the first blind ditch 141 and the second blind ditch 231, and then permeates to the fourth system sand layer or the filling layer, and the characteristic that the fourth system sand layer or the filling layer has large permeability coefficient and can absorb water rapidly is utilized as a drainage area of groundwater. The fourth system soil layer has high porosity and good permeability, the permeability coefficient is 10-20m/d, and the groundwater is permeated and diffused in the fourth system soil layer and cannot cause obvious rise of the soil layer water level, so that the basement groundwater pressure of the main drainage anti-floating basement is not more than 20kpa, the anti-floating requirement of the basement can be realized by the self weight of the basement, the drainage and the supply balance of the groundwater are realized, and the environmental protection is facilitated.
Further, a water-proof layer 142 is provided on the upper portion of the first foundation pit fertilizer tank 14 and the lower portion of the first foundation pit fertilizer tank 14, the water-proof layer 142 is paved by watertight materials such as cohesive soil, and a reverse-filtering geotechnical cloth 1421 is provided on the upper side of the water-proof layer 142 and the lower side of the water-proof layer 142; wherein the top mark of the water-proof layer 142 at the upper part of the first pit fertilizer slot 14 is lower than the elevation of the bedrock interface 4.
The basement groundwater self-balancing anti-floating system based on the bedrock shallow slope area is characterized in that a water-resisting layer 142 is arranged on the upper part of a first foundation pit fertilizer groove 14 and the lower part of the first foundation pit fertilizer groove 14, and a reverse-filtering geotechnical cloth 1421 is arranged on the upper side of the water-resisting layer 142 and the lower side of the water-resisting layer 142; the lower water-resisting layer 142 isolates the underground water in the first foundation pit fertilizer groove 14 from seepage; the reverse filtration geotextile 1421 is laid on the upper side of the lower water-blocking layer 142 to prevent loss of fine granular soil; the upper water barrier layer 142 isolates surface water from infiltration into the first pit manure pit 14.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; it will be appreciated by those skilled in the art that changes may be made to the embodiments described above, or equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. Basement groundwater self-balancing anti-floating system based on bedrock shallow buried slope area, its characterized in that: the water-saving and water-saving device comprises a main drainage anti-floating basement and an auxiliary drainage anti-floating basement, wherein the main drainage anti-floating basement and the auxiliary drainage anti-floating basement are arranged in a row manner; the main drainage anti-floating basement comprises an anti-floating foundation bottom plate and a main drainage anti-floating basement side wall, and the auxiliary drainage anti-floating basement comprises a drainage foundation bottom plate and an auxiliary drainage anti-floating basement side wall; the elevation of the anti-floating foundation baseplate is higher than that of the drainage foundation baseplate; the outer side of the side wall of the main drainage anti-floating basement is provided with a first foundation pit fertilizer groove, and the outer side of the side wall of the auxiliary drainage anti-floating basement is provided with a second foundation pit fertilizer groove; a water permeable pad is arranged below the anti-floating foundation bottom plate, a first blind ditch is arranged at the bottom of the first foundation pit fertilizer groove, and the water permeable pad is communicated with the first blind ditch so as to collect groundwater below the anti-floating foundation bottom plate to the first blind ditch through the water permeable pad;
the periphery in drainage foundation base plate's below and the fertile groove of second foundation ditch is fourth system sand soil layer or is filled the soil layer, the bottom in the fertile groove of second foundation ditch is provided with the second french drain, first french drain with the second french drain intercommunication just the elevation of first french drain is higher than the elevation of second french drain, in order to with the groundwater that first french drain was gathered extremely the second french drain and then permeates to fourth system sand soil layer or is filled the soil layer.
2. Basement groundwater self-balancing anti-floating system based on bedrock shallow slope area according to claim 1, characterized in that: and a concrete cushion layer and a waterproof film are arranged between the anti-floating foundation bottom plate and the water permeable cushion.
3. Basement groundwater self-balancing anti-floating system based on bedrock shallow slope region according to claim 1 or 2, characterized in that: the upper portion of the first foundation pit fertilizer groove and the lower portion of the first foundation pit fertilizer groove are respectively provided with a water-resisting layer.
4. A basement groundwater self-balancing anti-floating system based on bedrock shallow slope region according to claim 3, wherein: the upside of water-proof layer all be provided with anti-geotechnique's cloth that strains of water-proof layer's downside.
5. A basement groundwater self-balancing anti-floating system based on bedrock shallow slope region according to claim 3, wherein: the water-resisting layer is paved by cohesive soil.
6. A basement groundwater self-balancing anti-floating system based on bedrock shallow slope region according to claim 3, wherein: the top mark of the water-resisting layer at the upper part of the first foundation pit fertilizer groove is lower than the elevation of the bedrock interface.
7. Basement groundwater self-balancing anti-floating system based on bedrock shallow slope area according to claim 1, characterized in that: the water permeable pad is paved by broken stone or weathered sand.
8. Basement groundwater self-balancing anti-floating system based on bedrock shallow slope area according to claim 1, characterized in that: the first blind ditches and the second blind ditches are formed by filling embedded soft permeable pipes with broken stone or weathered sand.
9. Basement groundwater self-balancing anti-floating system based on bedrock shallow slope area according to claim 1, characterized in that: the bottom elevation of the first foundation pit fertilizer groove is higher than or equal to the elevation of the anti-floating anti-water level of the auxiliary drainage anti-floating basement.
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| CN201910151549.3A CN109930632B (en) | 2019-02-28 | 2019-02-28 | Basement groundwater self-balancing anti-floating system based on bedrock shallow buried slope area |
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| CN201910151549.3A CN109930632B (en) | 2019-02-28 | 2019-02-28 | Basement groundwater self-balancing anti-floating system based on bedrock shallow buried slope area |
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| CN113323017B (en) * | 2021-06-08 | 2023-03-28 | 浙大城市学院 | Construction method of side wall fertilizer groove foam concrete backfill system |
| CN113742826B (en) * | 2021-09-02 | 2024-03-19 | 贵州正业工程技术投资有限公司 | Active anti-floating design method based on anti-floating variable water level |
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| KR100748607B1 (en) * | 2006-09-29 | 2007-08-14 | 박옥교 | The construction method of basement drainage having double drainage canals and the system |
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| CN205348235U (en) * | 2016-02-02 | 2016-06-29 | 杭州博牛建筑设计咨询有限公司 | Novel anti system of floating of basement drainage |
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| CN207244679U (en) * | 2017-09-21 | 2018-04-17 | 南京城镇建筑设计咨询有限公司 | Anti-floating drainage arrangement for existing basement |
| CN209652992U (en) * | 2019-02-28 | 2019-11-19 | 青岛市勘察测绘研究院 | Basement underground water self-balancing anti-floating system based on base-rock shallow slope area |
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2019
- 2019-02-28 CN CN201910151549.3A patent/CN109930632B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100748607B1 (en) * | 2006-09-29 | 2007-08-14 | 박옥교 | The construction method of basement drainage having double drainage canals and the system |
| CN202730785U (en) * | 2012-06-29 | 2013-02-13 | 深圳市工勘岩土工程有限公司 | Anti-floating blind ditch water drainage structure for underground structure |
| CN205348235U (en) * | 2016-02-02 | 2016-06-29 | 杭州博牛建筑设计咨询有限公司 | Novel anti system of floating of basement drainage |
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