CN102286959B - Reinforced-clay seepage prevention structure and construction method thereof - Google Patents
Reinforced-clay seepage prevention structure and construction method thereof Download PDFInfo
- Publication number
- CN102286959B CN102286959B CN 201110162579 CN201110162579A CN102286959B CN 102286959 B CN102286959 B CN 102286959B CN 201110162579 CN201110162579 CN 201110162579 CN 201110162579 A CN201110162579 A CN 201110162579A CN 102286959 B CN102286959 B CN 102286959B
- Authority
- CN
- China
- Prior art keywords
- clay
- grid
- geo
- layer
- seepage prevention
- 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.)
- Active
Links
Images
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to a reinforced-clay seepage prevention structure and a construction method thereof. The invention aims to solve the technical problems on clay blanket crack resistance on the parts with bigger basic condition difference and improvement of the operation reliability and seepage prevention effect of clay blankets. In a technical scheme for solving the problems, the structure comprises a transition material layer, an inverted filter material layer, a clay blanket layer and a rock ballast protection layer, wherein the four layers are arranged above a flat reservoir bottom and are laid from bottom to top in sequence; and a plurality of geogrid layers are laid in the area in which uneven settlement is easy to occur and influenced areas of the area between the filter material layer and the rock ballast protection layer. The construction method comprises the following steps: a. excavating, backfilling and flattening the reservoir bottom; b. laminating and backfilling transition materials and filter materials layer by layer in sequence; c. laying a geogrid layer; d. laminating and filling clay layer by layer and laying a geogrid layer every 1-2 clay layers until the thickness reaches the designed layer thickness; and e. backfilling the rock ballast protection layer. The structure and the construction method are mainly used for reservoir bottom seepage prevention in the hydraulic and hydroelectric engineering.
Description
Technical field
The present invention relates to a kind of reinforced-clay seepage prevention structure and job practices thereof, mainly be applicable to the bottom of the reservior antiseepage of Hydraulic and Hydro-Power Engineering.
Background technology
The pumping energy storage power station project upper storage reservoir is had relatively high expectations to storehouse basin antiseepage, General Requirements day infiltration capacity be no more than 2/10000ths to 5/10000ths of aggregate storage capacity, when natural storehouse basin can not satisfy the seepage control criterion, need to take seepage control measure.Clay as a kind of common natural impervious material through being usually used in storehouse basin antiseepage, but clay tensile strength is very low, is easy to occur the drawing crack seam at the inhomogeneous position of sedimentation, thereby cause leakage preventing structure to lose efficacy.This problem of clay blanket that arranges at the position that basic condition differs greatly is very outstanding, for a long time in the urgent need to a kind of novel clay blanket leakage preventing structure pattern and job practices, to address the above problem.
Summary of the invention
The technical problem to be solved in the present invention is: the problem for above-mentioned existence provides a kind of both convenient constructions, cost rationally satisfies again reinforced-clay seepage prevention structure and the job practices thereof of storehouse basin antiseepage requirement, be intended to solve the differ greatly clay blanket cracking resistance problem at position of basic condition, reach the purpose that improves clay blanket operational reliability and anti-seepage effect.
The technical solution adopted in the present invention is: reinforced-clay seepage prevention structure; comprise the transition bed of material, the anti-filter bed of material, clay blanket layer and the rock ballast topping that are positioned at top, smooth bottom of the reservior, from bottom to top lay successively, it is characterized in that: between the described anti-filter bed of material and the rock ballast topping, the zone and the interval, influence area thereof that are prone to differential settlement lay some layers of geo-grid uniformly.
Described geo-grid comprises decanting zone geo-grid and sedimentation and the influence area geo-grid thereof that the space is arranged, wherein geo-grid coverage in decanting zone is the differential settlement district, this zone allows tensile strength control with the tensile stress that differential settlement causes greater than the pure clay bedding, sedimentation and influence area geo-grid coverage thereof are differential settlement district and influence area thereof, and the tensile stress that this zone causes with differential settlement allows 1/2 control of tensile strength greater than the pure clay bedding.
The number of plies of described sedimentation and influence area geo-grid thereof be the total number of plies of geo-grid 1/3～1/2 between.
Described geo-grid adopts macromolecular material to make the latticed of whole piece.
The job practices of reinforced-clay seepage prevention structure is characterized in that step is as follows:
A, bottom of the reservior excavation, backfill form smooth bottom of the reservior;
B, the bottom of the reservior after smooth be successively layered rolling backfill Transition Materials and filter material from bottom to top, forms respectively the transition bed of material and the anti-filter bed of material;
C, above the anti-filter bed of material, lay one deck geo-grid;
D, layered rolling fill clay, form the clay blanket layer, lay one deck geo-grid until the design bed thickness every 1～2 layer of clay rolling layers in the placement grinding process;
E, surperficial backfill rock ballast topping.
Described geo-grid need cover zone and the influence area thereof that is prone to differential settlement.
The invention has the beneficial effects as follows: the present invention between the anti-filter bed of material and rock ballast topping, be prone to the interregional every some layers of geo-grid of uniform laying of differential settlement; utilize the good tensile property of geo-grid; remedied the poor shortcoming of easily splitting that causes of pure clay bedding tensile property; form reliable leakage preventing structure at differential settlement than large part; satisfy structure stress and antiseepage requirement; under less engineering cost; improved greatly the barrier performance of clay blanket, guaranteed that the clay core structural safety is reliable.In addition, the present invention is simple in structure, construction technology is easy.
Description of drawings
Fig. 1 is layout plan of the present invention.
Fig. 2 is the A-A sectional drawing (bottom of the reservior of excavation and filling combination) of Fig. 1.
Fig. 3 is the A-A sectional drawing (bottom of the reservior of rigid building is set) of Fig. 1.
The specific embodiment
As shown in Figure 1-Figure 3, the present embodiment reinforced-clay seepage prevention structure, comprise and be positioned at smooth top, bottom of the reservior, the transition bed of material 6 of from bottom to top laying successively, the anti-filter bed of material 5, clay blanket layer 4 and rock ballast topping 3, between the described anti-filter bed of material 5 and the rock ballast topping 3, being prone to the zone of differential settlement and influence area thereof (is differ greatly position and peripheral certain limit thereof of basic condition, bottom of the reservior for excavation and filling combination shown in Figure 2, the zone and the influence area thereof that are prone to differential settlement are bottom of the reservior excavation and filling binding site and peripheral certain area thereof, i.e. excavation, in the both sides certain limit in backfill line of demarcation 1; For the bottom of the reservior that rigid building is set shown in Figure 3, the zone and the influence area thereof that are prone to differential settlement are clay blanket and rigid building connecting portion and peripheral certain area thereof) (geo-grid adopts macromolecular material to make latticed to some layers of geo-grid of layering laying, for guaranteeing the tension effect of geo-grid, every layer of geo-grid all made whole piece, and the vertical distance between the adjacent two layers geo-grid equates), to strengthen the tensile property of clay blanket layer 4, reduce the possibility that this position produces the crack, or the penetrability large fracture that may occur is decomposed into some shallow tables crack, avoid occurring concentrating infiltration, guarantee that the clay core structural safety is reliable.
Described geo-grid should be divided into according to the influence degree of differential settlement 11 two kinds of decanting zone geo-grid 10 and sedimentation and influence area geo-grid thereof, both spaces are arranged, wherein geo-grid 10 coverages in decanting zone are the differential settlement district, this zone allows tensile strength control with the tensile stress that differential settlement causes greater than the pure clay bedding, sedimentation and influence area geo-grid 11 coverages thereof are differential settlement district and influence area thereof, this zone allows 1/2 of tensile strength to control with the tensile stress that differential settlement causes greater than the pure clay bedding, and it is 10-20kpa that described pure clay bedding allows tensile strength; The number of plies of described sedimentation and influence area geo-grid 11 thereof be controlled at the total number of plies of geo-grid 1/3～1/2 between, make the resistance to tension of reinforcement clay bedding corresponding with the stress that it bears, guarantee to be out of shape even transition between reinforcement clay bedding and the pure clay bedding.
The job practices of present embodiment is as follows:
A, bottom of the reservior excavation, backfill form smooth bottom of the reservior, or backfill is smooth after rigid building 8 constructions are finished, and forms smooth bottom of the reservior;
B, the bottom of the reservior after smooth be successively layered rolling backfill Transition Materials and filter material from bottom to top, forms respectively the transition bed of material 6 and the anti-filter bed of material 5; Namely at first at smooth bottom of the reservior backfill one deck Transition Materials, and roll smooth, namely filling out one deck rolls once, so repeat to form the transition bed of material 6 until reach the design bed thickness, then backfill one deck filter material above the transition bed of material 6, and roll smoothly, and namely fill out one deck and roll once, so repeat to form the anti-filter bed of material 5 until reach the design bed thickness;
C, above the anti-filter bed of material 5, lay one deck geo-grid;
D, layered rolling fill clay, form clay blanket layer 4, lay one deck geo-grid until the design bed thickness every 1～2 layer of clay rolling layers in the placement grinding process; Fill clay and roll smooth above the geo-grid of this example in step c, form the clay rolling layers, and in this clay rolling layers laying one deck geo-grid, then above the geo-grid that is positioned at the surface, fill clay and roll smooth, and lay from the teeth outwards one deck geo-grid, be that every alternating floor clay rolling layers is laid one deck geo-grid, so repeat alternately to lay until the design bed thickness.In the practical application, can as the case may be, lay one deck geo-grid until the design bed thickness every two layers of clay rolling layers.
E, surperficial backfill rock ballast topping 3 get final product.
Among above-mentioned steps c, the d, described geo-grid need cover zone and the influence area thereof that is prone to differential settlement, and be divided into 11 two kinds of decanting zone geo-grid 10 and sedimentation and influence area geo-grid thereof according to the influence degree of differential settlement, both spaces are arranged, wherein geo-grid 10 coverages in decanting zone are the differential settlement district, and sedimentation and influence area geo-grid 11 coverages thereof are differential settlement district and influence area thereof.Wherein be positioned at the geo-grid of the bottom, namely the geo-grid among the step c is sedimentation and influence area geo-grid 11 thereof.
Claims (4)
1. reinforced-clay seepage prevention structure, comprise the transition bed of material (6), the anti-filter bed of material (5), clay blanket layer (4) and the rock ballast topping (3) that are positioned at top, smooth bottom of the reservior, from bottom to top lay successively, it is characterized in that: between the described anti-filter bed of material (5) and the rock ballast topping (3), be prone to some layers of geo-grid of the uniform laying in zone and interval, influence area thereof of differential settlement;
Described geo-grid comprises decanting zone geo-grid (10) and sedimentation and influence area geo-grid (11) thereof, both spaces are arranged, wherein decanting zone geo-grid (10) coverage is the differential settlement district, this zone allows tensile strength control with the tensile stress that differential settlement causes greater than the pure clay bedding, sedimentation and influence area geo-grid (11) coverage thereof are differential settlement district and influence area thereof, and the tensile stress that this zone causes with differential settlement allows 1/2 control of tensile strength greater than the pure clay bedding;
The number of plies of described sedimentation and influence area geo-grid (11) thereof be the total number of plies of geo-grid 1/3 ~ 1/2 between.
2. reinforced-clay seepage prevention structure according to claim 1 is characterized in that: described geo-grid adopts macromolecular material to make the latticed of whole piece.
3. the job practices of a reinforced-clay seepage prevention structure as claimed in claim 1 is characterized in that step is as follows:
A, bottom of the reservior excavation, backfill form smooth bottom of the reservior;
B, the bottom of the reservior after smooth be successively layered rolling backfill Transition Materials and filter material from bottom to top, forms respectively the transition bed of material (6) and the anti-filter bed of material (5);
C, lay one deck geo-grid in the anti-filter bed of material (5) top;
D, layered rolling fill clay, form clay blanket layer (4), lay one deck geo-grid until the design bed thickness every 1 ~ 2 layer of clay rolling layers in the placement grinding process;
E, surperficial backfill rock ballast topping (3).
4. the job practices of reinforced-clay seepage prevention structure according to claim 3, it is characterized in that: described geo-grid need cover zone and the influence area thereof that is prone to differential settlement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162579 CN102286959B (en) | 2011-06-14 | 2011-06-14 | Reinforced-clay seepage prevention structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162579 CN102286959B (en) | 2011-06-14 | 2011-06-14 | Reinforced-clay seepage prevention structure and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102286959A CN102286959A (en) | 2011-12-21 |
| CN102286959B true CN102286959B (en) | 2013-03-20 |
Family
ID=45333689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110162579 Active CN102286959B (en) | 2011-06-14 | 2011-06-14 | Reinforced-clay seepage prevention structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102286959B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3505687A1 (en) * | 1985-02-19 | 1986-08-21 | Basf Ag, 6700 Ludwigshafen | SEALING SCREEN FOR DEPONIES |
| CN201214784Y (en) * | 2008-02-29 | 2009-04-01 | 上海新纺织产业用品有限公司 | High strength earth work grille net |
| IT1392652B1 (en) * | 2008-09-11 | 2012-03-16 | Carpi Tech Bv Amsterdam Chiasso Branch | METHOD AND SYSTEM FOR FIXING WATERPROOF MEMBRANES TO HYDRAULIC WORKS |
| CN101413244B (en) * | 2008-11-17 | 2012-02-22 | 中国科学院地质与地球物理研究所 | Earth work grille for reinforcing highway foundation and its use method |
| CN101581085A (en) * | 2009-05-27 | 2009-11-18 | 中国水电顾问集团华东勘测设计研究院 | Reservoir seepage-proofing geomembrane tiered structure and construction method thereof |
| CN202131585U (en) * | 2011-06-14 | 2012-02-01 | 中国水电顾问集团华东勘测设计研究院 | Ribbed clay impermeable structure |
-
2011
- 2011-06-14 CN CN 201110162579 patent/CN102286959B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102286959A (en) | 2011-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103643656B (en) | High rock-fill dam membrane anti-seepage body on deep coverage layer and construction method of high rock-fill dam membrane anti-seepage body | |
| CN102418424B (en) | Method for reinforcing silo in circumferential direction | |
| CN204023501U (en) | A remove dangerous and consolidate prevention of seepage processing structure for earth and rockfill dam | |
| CN202945591U (en) | High-strength concrete prestress prefabricated (PHC) sheet pile | |
| CN102677703B (en) | Falling-rock-impact-resistant open cut tunnel/shed tunnel ceiling cushion layer structure and construction method thereof | |
| CN202039387U (en) | Waterproof shutoff of epoxy pile head and secondary slip casting leaking stoppage structure | |
| CN102660936A (en) | Method for realizing seepage prevention of bridge wall by means of polyvinyl chloride film | |
| CN201087334Y (en) | Reservoir bottom and dam body integrated anti-seepage structure | |
| CN204780933U (en) | Shoring of trench landing stage system | |
| CN106277688A (en) | The mounting process of fw frp anaerobic tank | |
| CN104763127A (en) | Heavy load resisting and acid-preventing terrace and construction method thereof | |
| CN102286959B (en) | Reinforced-clay seepage prevention structure and construction method thereof | |
| CN103993580A (en) | River way retaining wall | |
| CN202131585U (en) | Ribbed clay impermeable structure | |
| CN203905240U (en) | Prestress hollow laminated floor slab | |
| CN202830952U (en) | Novel soft soil foundation structure | |
| CN111305220A (en) | Concrete support and structural top plate combined building system based on permanent and temporary combination and construction method thereof | |
| CN219011291U (en) | Pass-through reinforced earth retaining wall | |
| CN104404918B (en) | Adopt composite geo-membrane and part to change and fill out the method that clay repairs clay through crack | |
| CN104532798A (en) | Flexible slag blocking dam structure and construction method thereof | |
| CN202164628U (en) | Water-proof construction structure in join of adjacent building baseboards | |
| CN105297679A (en) | Seepage-proofing method and structure for upstream surface layer of rock-fill dam | |
| CN212001126U (en) | Concrete support and structure top plate combined building system based on permanent-temporary combination | |
| CN210368867U (en) | Superimposed structure of homogeneity earth dam and rock-fill dam | |
| CN201943094U (en) | Building foundation structure based on cement-based penetration-resistant waterproof coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |