CN109469042B - Anti-seepage storage yard field karst cave processing structure - Google Patents
Anti-seepage storage yard field karst cave processing structure Download PDFInfo
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- CN109469042B CN109469042B CN201811505890.6A CN201811505890A CN109469042B CN 109469042 B CN109469042 B CN 109469042B CN 201811505890 A CN201811505890 A CN 201811505890A CN 109469042 B CN109469042 B CN 109469042B
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- 238000003860 storage Methods 0.000 title abstract description 13
- 239000004567 concrete Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 23
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 17
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 17
- 230000002265 prevention Effects 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 46
- 239000004746 geotextile Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 239000004927 clay Substances 0.000 claims description 14
- 229920006262 high density polyethylene film Polymers 0.000 claims description 14
- 239000002689 soil Substances 0.000 claims description 12
- 239000011241 protective layer Substances 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 6
- 239000003673 groundwater Substances 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Hydrology & Water Resources (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides an anti-seepage disposal structure for a karst cave in a storage yard, which comprises a reinforced concrete cover plate; the reinforced concrete cover plate covers the concrete cushion layer, the concrete cushion layer is laminated in the reinforced layer, a karst cave is arranged at the bottom of the concrete cushion layer, and the area of the concrete cushion layer is larger than the top opening of the karst cave; the top surfaces of the reinforced concrete cover plate and the reinforcing layer are covered with an anti-seepage system; the HDPE pipe penetrates through the seepage-proofing system, the reinforced concrete cover plate and the concrete cushion layer to be immersed in the karst cave; the underground water guide pipes are traversed through the reinforced layer. The invention can drain the underground water through the karst cave and the underground water drainage system, effectively solves the problem that the underground water can not be discharged by the traditional karst cave landfill treatment technology, and avoids the damage of the seepage prevention system caused by the too high underground water level.
Description
Technical Field
The invention relates to a karst cave treatment structure for an impermeable storage yard field region.
Background
The karst cave is a complex underground space formed by long-term corrosion of underground water in limestone areas, and when the karst cave is encountered in construction projects, if the karst cave is not treated in time, the risk of the whole projects is increased, and even engineering accidents occur.
The existing karst cave treatment technology mainly adopts landfill, and only aims at different karst cave types, and the adopted landfill materials and landfill technologies are different.
(1) The traditional processing method comprises the following steps: the method has the advantages of long construction period, high cost and incapability of ensuring the full filling of the karst cave.
(2) Filling karst cave by using engineering waste soil: the method for preparing the bubble mixed soil by using the engineering waste soil as the filling material of the underground karst cave comprises the following specific steps: geological investigation, hole collapse protection, drilling flushing, bubble mixing soil preparation, grouting operation and the like. The method can ensure the full filling of the karst cave.
(3) Filling methods of different materials for different types of karst cave are adopted: the karst cave is classified first, and different filling methods are adopted according to different karst cave types. The method comprises the following specific steps: adopting a method of backfilling clay drilling holes and fixing walls for the small karst cave; the middle karst cave adopts a method of blocking and wall building by the rock clay, and the large karst cave adopts a method of pulping by the rock cement soil. The method adopts different treatment methods aiming at different types of karst cave, is beneficial to saving materials, shortening construction period and improving construction efficiency.
The existing karst cave landfill treatment technology can not meet the requirements of the karst cave treatment in the impermeable storage yard field. Firstly, after a karst cave channel is completely plugged by the existing karst cave landfill treatment technology, groundwater can not be drained through the karst cave any more, and if the groundwater level is too high, huge jacking force is generated on an anti-seepage system of an anti-seepage storage yard, so that the anti-seepage system is damaged; secondly, the existing karst cave landfill treatment technology cannot meet the paving flatness requirement of an anti-seepage system of an anti-seepage storage yard; finally, the conventional karst cave landfill treatment technology cannot completely avoid uneven settlement of the backfill matters of the karst cave under the action of external force, and once the uneven settlement occurs, the seepage prevention system is inevitably damaged.
Disclosure of Invention
In order to solve the technical problems, the invention provides the karst cave treatment structure of the impermeable storage yard field region, which can smoothly drain underground water, can meet the paving flatness requirement of an impermeable system of the impermeable storage yard, and can avoid the damage to the impermeable system caused by uneven sedimentation of the karst cave under the action of external force.
The invention is realized by the following technical scheme.
The invention provides an anti-seepage storage yard karst cave treatment structure, which comprises a reinforced concrete cover plate; the reinforced concrete cover plate covers the concrete cushion layer, the concrete cushion layer is laminated in the reinforced layer, a karst cave is arranged at the bottom of the concrete cushion layer, and the area of the concrete cushion layer is larger than the top opening of the karst cave; the top surfaces of the reinforced concrete cover plate and the reinforcing layer are covered with an anti-seepage system; the HDPE pipe penetrates through the seepage-proofing system, the reinforced concrete cover plate and the concrete cushion layer to be immersed in the karst cave; the underground water guide pipes are traversed through the reinforced layer.
The karst cave is divided into a shallow karst cave type and a hidden karst cave type, and when the karst cave is the shallow karst cave type, backfill gravel materials are filled in the karst cave.
The compaction degree of the backfill gravel material in the karst cave is not lower than 0.93.
The concrete cushion layer is C15 concrete and has a thickness of 10cm.
The seepage-proofing system is a plurality of layers, and comprises a base layer, a clay protective layer, a GCL soil blanket, a smooth HDPE film and protective layer geotextile from bottom to top.
The GCL soil blanket has the specification of 4800g/m 2 The protective layer geotextile is a filament non-woven geotextile with the specification of 600g/m 2 。
The specification of the smooth HDPE film is 2.0mm, the smooth HDPE film is locally overlapped at the passing part of the HDPE pipe and is extruded and welded by adopting a single welding line, and the overlapped length is not less than 0.5m in the horizontal direction and not less than 0.7m in the vertical direction.
The HDPE pipe is an phi 160 HDPE pipe.
The underground water guide and drainage system is composed of the underground water guide and drainage pipes, geotextile, backfill gravels and backfill clay, wherein the underground water guide and drainage pipes penetrate through the backfill gravels filling part.
The invention has the beneficial effects that: the underground water can be discharged through the karst cave and the underground water guide and discharge system, so that the problem that the underground water cannot be discharged in the traditional karst cave landfill treatment technology is effectively solved, and the damage to an anti-seepage system caused by the overhigh underground water level is avoided; by arranging the reinforced concrete cover plate on the surface of the covering layer at the top of the karst cave, the problem that the conventional karst cave landfill treatment technology cannot meet the paving flatness requirement of an anti-seepage system of an anti-seepage storage yard is effectively solved, and the damage of uneven sedimentation generated by backfill materials of the karst cave to the anti-seepage system under the action of external force can be avoided; the application of the pipe film penetrating technology strengthens the weak part of the seepage prevention system for pipe film penetration, can effectively avoid the seepage of sewage such as percolate and the like at the weak part, and has great use value for the seepage prevention storage yard.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention applied to a shallow karst cave;
FIG. 2 is a schematic diagram of the structure of the invention applied to a hidden karst cave;
FIG. 3 is a cross-sectional view taken along the A-A plane in FIGS. 1 and 2;
fig. 4 is a schematic view of the detail of the HDPE pipe of fig. 1 and 2.
In the figure: 1-bedrock, 2-stratum boundary, 3-reinforcement layer, 4-seepage prevention system, 5-karst cave, 6-backfill gravel material, 7-concrete cushion layer, 8-reinforced concrete cover plate, 9-groundwater guide and drainage pipe, 10-geotextile, 11-backfill gravels, 12-backfill clay, 13-blind drain, 14-smooth HDPE film, 15-HDPE pipe and 16-weld joint.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
An anti-seepage storage yard karst cave treatment structure as shown in fig. 1 to 4 comprises a reinforced concrete cover plate 8; the reinforced concrete cover plate 8 covers the concrete cushion layer 7, the concrete cushion layer 7 is pressed in the reinforced layer 3, a karst cave 5 is arranged at the bottom of the concrete cushion layer 7, and the area of the concrete cushion layer 7 is larger than the top opening of the karst cave 5; the top surfaces of the reinforced concrete cover plate 8 and the reinforcing layer 3 are covered with an anti-seepage system 4; the HDPE pipe 15 penetrates through the seepage prevention system 4, the reinforced concrete cover plate 8 and the concrete cushion 7 to be immersed into the karst cave 5; there are groundwater drainage pipes 9 traversing from the reinforcement layer 3.
The karst cave 5 is divided into a shallow karst cave type and a hidden karst cave type, and when the karst cave 5 is the shallow karst cave type, backfill gravel materials 6 are filled in the karst cave 5.
The backfill gravel material 6 has a compaction degree of not less than 0.93 in the karst cave 5.
The concrete cushion 7 is made of C15 concrete and has a thickness of 10cm.
The seepage-proofing system 4 is a plurality of layers, and comprises a base layer, a clay protective layer, a GCL soil blanket, a smooth HDPE film 14 and protective geotextile from bottom to top.
The GCL soil blanket has the specification of 4800g/m 2 The protective layer geotextile is a filament non-woven geotextile with the specification of 600g/m 2 。
The specification of the smooth HDPE film 14 is 2.0mm, the smooth HDPE film 14 is locally overlapped at the passing part of the HDPE pipe 15 and is extruded and welded by adopting a single welding seam 16, and the overlapped length is not less than 0.5m in the horizontal direction and not less than 0.7m in the vertical direction.
The HDPE pipe 15 is a HDPE pipe of Φ160 (SDR 13.6).
The underground water guide and discharge pipe 9, the geotechnical cloth 10, the backfill gravels 11 and the backfill clay 12 form an underground water guide and discharge system, wherein the underground water guide and discharge pipe 9 passes through the filling part of the backfill gravels 11.
More generally, the invention is divided mainly into the following parts: a. karst cave structure and treatment measures, b. Groundwater drainage system, c. Seepage prevention system, d. Pipe penetrating system.
Wherein:
the karst cave structure and the treatment measure are divided into a shallow karst cave structure and the treatment measure and a hidden karst cave structure and the treatment measure. The shallow karst cave structure and the treatment measure consist of a bedrock 1, a stratum dividing line 2, a reinforced layer 3, an anti-seepage system 4, a karst cave 5, backfill gravel materials 6, a concrete cushion layer 7 and a reinforced concrete cover plate 8; the hidden karst cave structure comprises a treatment measure bedrock 1, a stratum dividing line 2, a medium differentiation layer/reinforcement layer 3, an anti-seepage system 4, a karst cave 5, a concrete cushion layer 7 and a reinforced concrete cover plate 8.
The underground water drainage system consists of an underground water drainage pipe 9, geotextile 10, backfill gravels 11 and backfill clay 12.
The tube film penetrating system consists of a smooth HDPE film 14, a HDPE tube 15 and a weld 16.
In operation, the method can be carried out according to the following steps:
1) The covering layer is removed in a certain range on the upper surface of the stratum at the top of the karst cave 5 (shallow karst cave or hidden karst cave), the shallow karst cave is filled with backfill gravel material 6, and a concrete cushion layer 7 and a reinforced concrete cover plate 8 are sequentially constructed on the basis of the covering layer or backfill gravel material 6;
2) Slope laying and excavation are carried out on the underground water drainage blind ditch 13, geotextile 10 laying, bottom layer broken stone 11 backfilling, underground water drainage pipe 9 laying, upper layer broken stone 11 backfilling, geotextile 10 sewing and backfilling clay 12 filling are sequentially carried out after excavation is finished, wherein the underground water drainage system at the upper part of the karst cave 5 is preset when karst cave treatment measures are implemented, and the implementation sequence is the same as that described above;
3) On the basis of the treatment measures of the karst cave 5 and the implementation of the underground water drainage system, the construction of the seepage prevention system 4 is carried out, and the construction sequence sequentially comprises the steps of base layer rolling, clay protective layer laying and rolling, GCL soil blanket laying, smooth HDPE film 14 laying and welding and protective layer geotextile laying;
4) HDPE pipe 15 in the pipe penetrating system is pre-buried when the solution cavity 5 treatment measure is implemented, and welding of smooth HDPE film 14 and DPE pipe 15 is implemented when smooth HDPE film 14 is laid in the seepage-proofing system.
In addition, in the specific implementation, it should also be noted that:
1) The reinforced concrete cover plate 7 adopts C25 concrete and phi 16HRB300 steel bars, and the coverage area is about 1m larger than the side line of the karst cave 5; the labels and the sizes of the reinforced concrete cover plates 7 and the specifications and the intervals of the reinforced bars can be determined or adjusted through structural calculation according to actual geological conditions and the conditions of the karst cave 5;
2) The main pipe of the underground water guide and discharge pipe 9 adopts a phi 315HDPE flower pipe (SDR 13.6), and the branch pipe adopts a phi 200HDPE flower pipe (SDR 13.6); each 45 degrees of the circumference of the pipe is provided with a phi 20 hole, each 12cm of the length of the pipe is provided with a phi 20 hole, and the holes are arranged in a quincunx shape;
3) The backfill broken stone 11 adopts broken stone with the diameter of 3-5 cm, and the compactness is not lower than 0.93;
4) The compaction degree of the backfilled clay 12 is not lower than 0.93 so as to avoid uneven sedimentation;
5) The cross section of the blind ditch 13 is in an inverted trapezoid shape, the bottom width is 0.6m, the top width is 2.1m, the height is 1.5m, and the slope of the excavated slope is 1:0.5;
6) The degree of solidity of the base layer of the seepage-proofing system 4 is not lower than 0.93 so as to avoid uneven sedimentation;
7) The thickness of the clay protective layer of the seepage-proofing system 4 is not less than 60cm, and the compactness is not less than 0.93 so as to avoid uneven sedimentation.
Claims (7)
1. The utility model provides a prevention of seepage stock yard field karst cave treatment structure, includes reinforced concrete apron (8), its characterized in that: the reinforced concrete cover plate (8) is covered on the concrete cushion layer (7), the concrete cushion layer (7) is pressed in the reinforced layer (3), a karst cave (5) is arranged at the bottom of the concrete cushion layer (7), and the area of the concrete cushion layer (7) is larger than the top opening of the karst cave (5); the top surfaces of the reinforced concrete cover plate (8) and the reinforcing layer (3) are covered with an anti-seepage system (4); the HDPE pipe (15) penetrates through the seepage prevention system (4), the reinforced concrete cover plate (8) and the concrete cushion layer (7) to be immersed into the karst cave (5); the underground water guide pipe (9) is crossed from the reinforced layer (3);
the karst cave (5) is divided into a shallow karst cave type and a hidden karst cave type, and when the karst cave (5) is the shallow karst cave type, backfill gravel materials (6) are filled in the karst cave (5);
the underground water guide and drainage system is composed of an underground water guide and drainage pipe (9), geotechnical cloth (10), backfill gravels (11) and backfill clay (12), wherein the underground water guide and drainage pipe (9) penetrates through the filling part of the backfill gravels (11).
2. The impermeable yard field solution cavity treatment structure of claim 1, wherein: the compaction degree of the backfill gravel material (6) in the karst cave (5) is not lower than 0.93.
3. The impermeable yard field solution cavity treatment structure of claim 1, wherein: the concrete cushion layer (7) is made of C15 concrete and has the thickness of 10cm.
4. The impermeable yard field solution cavity treatment structure of claim 1, wherein: the seepage prevention system (4) is a plurality of layers, and comprises a base layer, a clay protective layer, a GCL soil blanket, a smooth HDPE film (14) and protective layer geotextile from bottom to top.
5. The impermeable yard field solution cavity treatment structure of claim 4, wherein: the GCL soil blanket has the specification of 4800g/m 2 The protective layer geotextile is a filament non-woven geotextile with the specification of 600g/m 2 。
6. The impermeable yard field solution cavity treatment structure of claim 4, wherein: the specification of the smooth HDPE film (14) is 2.0mm, the smooth HDPE film (14) is locally overlapped at the passing part of the HDPE pipe (15) and is extruded and welded by adopting a single welding seam (16), and the overlapped length is not less than 0.5m in the horizontal direction and not less than 0.7m in the vertical direction.
7. The impermeable yard field solution cavity treatment structure of claim 1, wherein: the HDPE pipe (15) is an HDPE pipe with phi 160.
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| CN201811505890.6A CN109469042B (en) | 2018-12-10 | 2018-12-10 | Anti-seepage storage yard field karst cave processing structure |
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| CN109469042B true CN109469042B (en) | 2024-03-26 |
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| CN110886308B (en) * | 2019-11-08 | 2021-05-07 | 济南轨道交通集团有限公司 | Rapid frozen groundwater plugging method based on protection karst water channel |
| CN110886305B (en) * | 2019-11-08 | 2021-05-07 | 济南轨道交通集团有限公司 | Foundation pit water burst layered backfilling and plugging method based on protection karst water channel |
| CN110984120B (en) * | 2019-12-31 | 2020-09-25 | 桂林电子科技大学 | Filling structure of shallow-buried non-pressure water-filled karst cave and construction method thereof |
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| US6719493B1 (en) * | 1999-07-13 | 2004-04-13 | Friedrich Meyer | Method and system for encasing an endless, laid pipeline conduit with backfill concrete |
| CN203742622U (en) * | 2013-11-13 | 2014-07-30 | 江南水利水电工程公司 | Seep-proof component for constructing bearing structure |
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| CN106013178A (en) * | 2016-05-25 | 2016-10-12 | 河北建设勘察研究院有限公司 | Filling method for karst surface collapse of shallow-buried karst area |
| CN209482289U (en) * | 2018-12-10 | 2019-10-11 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of antiseepage stockyard place karst cave treatment structure |
-
2018
- 2018-12-10 CN CN201811505890.6A patent/CN109469042B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719493B1 (en) * | 1999-07-13 | 2004-04-13 | Friedrich Meyer | Method and system for encasing an endless, laid pipeline conduit with backfill concrete |
| CN203742622U (en) * | 2013-11-13 | 2014-07-30 | 江南水利水电工程公司 | Seep-proof component for constructing bearing structure |
| CN105201001A (en) * | 2015-10-10 | 2015-12-30 | 中国电建集团贵阳勘测设计研究院有限公司 | Composite seepage preventing structure for large karst cave in karst region and construction method thereof |
| CN106013178A (en) * | 2016-05-25 | 2016-10-12 | 河北建设勘察研究院有限公司 | Filling method for karst surface collapse of shallow-buried karst area |
| CN209482289U (en) * | 2018-12-10 | 2019-10-11 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of antiseepage stockyard place karst cave treatment structure |
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