CN105239534A - Connecting structure for dam foundation gallery and dam body core wall - Google Patents
Connecting structure for dam foundation gallery and dam body core wall Download PDFInfo
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- CN105239534A CN105239534A CN201510649014.0A CN201510649014A CN105239534A CN 105239534 A CN105239534 A CN 105239534A CN 201510649014 A CN201510649014 A CN 201510649014A CN 105239534 A CN105239534 A CN 105239534A
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Abstract
The invention discloses a connecting structure for a dam foundation gallery and a dam body core wall. By means of the connecting structure, the contact slope between the dam foundation gallery and the dam body core wall can be reduced. The connecting structure comprises the dam foundation gallery arranged on a covering layer and the dam body core wall arranged on the covering layer and the dam foundation gallery. The connecting structure further comprises a cushion layer and an inverted filter layer which are arranged between the dam body core wall and the covering layer and located at the upstream side and the downstream side of the dam foundation gallery respectively and a clay layer arranged between the dam foundation gallery and the dam body core wall. A water and leak proofing agent layer, a pitch anti-leakage layer and a composite geo-membrane are arranged on the surface of the dam foundation gallery. The sedimentation amount of the core wall can be reduced through the cushion layer. Piping and flowing soil can be prevented through the inverted filter layer. The deformation between the core wall and the gallery can be coordinated through the clay layer, and the contact slope between the core wall and the gallery can be reduced through the synergistic effect of the clay layer, the cushion layer and the inverted filter layer. By means of the water and leak proofing agent layer, the pitch anti-leakage layer and the composite geo-membrane, the contact slope at the bottom of the core wall and between the core wall and the gallery can be reduced, and the anti-leakage effect of the connecting structure can be reinforced.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering field, be specifically related to the syndeton of a kind of dam foundation gallery and dam body core-wall.
Background technology
For earth and rockfill dam, the connecting portion of dam foundation impervious wall and dam body core-wall is the weak link of whole seepage control of dam, is typically employed in impervious wall top and arranges dam foundation gallery and be connected with dam body core-wall.Because dam foundation gallery and dam body core-wall rigidity differ greatly, larger differential settlement will be produced between dam foundation gallery and dam body core-wall, the contact gradient of dam foundation gallery and dam body core-wall contact surface is often comparatively large, makes the connecting portion of dam foundation gallery and dam body core-wall become seepage control of dam weak link the most.
There is following defect in the syndeton of existing dam foundation gallery and dam body core-wall: 1), the contact gradient of dam foundation gallery and dam body core-wall contact surface is still larger; 2), anti-seepage effect is bad, the base be particularly connected with bank slope at dam foundation gallery covers near boundary line or base covers boundary line sudden change place, between dam foundation gallery and dam body core-wall, differential settlement is larger, and dam foundation gallery is subject to larger tensile stress usually, and surface may produce crack and leak.
Summary of the invention
The technical problem to be solved in the present invention is to provide and a kind ofly reduces the dam foundation gallery of contact gradient between dam foundation gallery and dam body core-wall and the syndeton of dam body core-wall.
The technical solution adopted for the present invention to solve the technical problems is: the syndeton of dam foundation gallery and dam body core-wall, comprise the dam body core-wall being arranged on supratectal dam foundation gallery and being arranged on covering layer and dam foundation gallery, also comprise and to be arranged between dam body core-wall and covering layer and to lay respectively at bed course and the loaded filter of side, dam foundation gallery upstream and downstream, and be arranged on the clay layer between dam foundation gallery and dam body core-wall.
Further, in described clay layer, the index of plasticity of clay is greater than 15.
Further, the external surface of described dam foundation gallery is provided with leakage preventing structure.
Be further, described leakage preventing structure comprises the waterproofing and leakage-stopping oxidant layer be arranged on dam foundation gallery external surface, described waterproofing and leakage-stopping oxidant layer cover completely be arranged on dam foundation gallery external surface on, and its two ends being arranged in position, dam foundation gallery abutment wall corner embed bed course and loaded filter respectively.
Further, described leakage preventing structure also comprises the pitch impervious barrier be arranged on waterproofing and leakage-stopping oxidant layer surface, and described pitch impervious barrier connects with the upper surface of bed course and loaded filter respectively near the two ends at position, dam foundation gallery abutment wall corner.
Further, also composite geo-membrane is comprised; Described composite geo-membrane comprises two parts, and wherein a part is arranged on mat surface and pitch impervious barrier stream side surface, and another part is arranged in loaded filter surface and pitch impervious barrier downstream side surface.
Further, described dam foundation gallery is provided with fixed structure.
Be further, described fixed structure comprises pre-buried being arranged in dam foundation roof arch of gallery and the connector be connected and fixed with waterproofing and leakage-stopping oxidant layer and pitch impervious barrier, and be connected and clamping plate waterproofing and leakage-stopping oxidant layer, pitch impervious barrier and composite geo-membrane are fixed with the abutment wall of dam foundation gallery, and at least two pieces along the spaced mounting plate of dam foundation gallery length direction.
Further, at least two pieces, described clamping plate are also arranged along dam foundation gallery length direction interval, and every block clamping plate are all through antirust treatment; Described clamping plate comprise pressure strip and connecting bolt, and described pressure strip overlays on composite geo-membrane, and described connecting bolt is arranged on pressure strip and is also connected with the abutment wall of composite geo-membrane, pitch impervious barrier, waterproofing and leakage-stopping oxidant layer and dam foundation gallery successively.
Further, described mounting plate comprises arch band steel plate and vertical band steel plate; Described arch band steel plate be arranged on be positioned at dam foundation roof arch of gallery place pitch impervious barrier on the surface, its two ends are connected with the clamping plate on the abutment wall of dam foundation gallery both sides respectively; Described vertical band steel plate be arranged on be positioned at dam foundation gallery abutment wall place composite geo-membrane on the surface, its upper end is connected with clamping plate.
The invention has the beneficial effects as follows: the bed course being arranged on upstream can reduce the settling amount of dam body core-wall, the loaded filter being arranged on downstream can prevent the generation of piping and stream soil; Clay layer can coordinate the distortion between dam body core-wall and dam foundation gallery, and and bed course and loaded filter to act synergistically the contact gradient reduced between core-wall and gallery; Being arranged on the waterproofing and leakage-stopping oxidant layer on gallery surface, pitch impervious barrier and composite geo-membrane can prevent gallery from leaking because producing crack, reduces the contact gradient bottom core-wall and between core-wall and gallery, and strengthens the anti-seepage effect of connecting portion.
Accompanying drawing explanation
Fig. 1 is enforcement structural representation of the present invention;
Be labeled as in figure: dam foundation gallery 1, waterproofing and leakage-stopping oxidant layer 11, pitch impervious barrier 12, connector 13, clamping plate 14, arch band steel plate 151, vertically band steel plate 152, dam body core-wall 2, covering layer 3, bed course 4, loaded filter 5, clay layer 6, composite geo-membrane 7.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the syndeton of dam foundation gallery and dam body core-wall, comprise the dam foundation gallery 1 be arranged on covering layer 3 and the dam body core-wall 2 be arranged on covering layer 3 and dam foundation gallery 1, also comprise and to be arranged between dam body core-wall 2 and covering layer 3 and to lay respectively at bed course 4 and the loaded filter 5 of side, dam foundation gallery 1 upstream and downstream, and be arranged on the clay layer 6 between dam foundation gallery 1 and dam body core-wall 2.Wherein, bed course 4 is divided into rigidity and flexible two classes usually, and rigid mat is generally made up of concrete, flexible cushion be generally with the pellets such as sand, slag, rubble, dirt in addition compacting form; Bed course 4 can improve the steady situation of water of covering layer 3 upstream face, is beneficial to the construction of dam body core-wall 2, and can spread load to reduce soil matrix distortion, decreases the settling amount of dam body core-wall 2; Meanwhile, bed course 4 also has the effect of transition and anti-filter.Loaded filter 5 is usually made up of materials such as different sand, rubble or the cobbles of granular size, generally arrange two-layer more than; Loaded filter 5 is made up of the particle of certain grating particle diameter, can prevent dam body or the dam foundation fine grained from producing mobile; Loaded filter 5 one aspect can reduce the settling amount of dam body core-wall 2, takes away the fine grained in dam body core-wall 2 or covering layer 3 when percolating water can be avoided to flow out on the other hand, thus can prevent the generation of piping and stream soil.Clay layer 6 is formed by filling out the clay be located between dam body core-wall 2 and dam foundation gallery 1, and it can coordinate the distortion between dam body core-wall 2 and dam foundation gallery 1, reduces the contact gradient between dam body core-wall 2 and dam foundation gallery 1; In clay layer 6, clay is preferably the high plastic clay that index of plasticity is greater than 15.
On the basis of the above, in order to improve the barrier performance of this syndeton, the external surface of described dam foundation gallery 1 is provided with leakage preventing structure.Leakage preventing structure can have numerous embodiments, such as, is arranged on structure that one or more layers antiseepage film, impermeable coating or antiseepage film on dam foundation gallery 1 external surface combine with impermeable coating etc.; Be preferably the structure shown in Fig. 1, described leakage preventing structure comprises the waterproofing and leakage-stopping oxidant layer 11 be arranged on dam foundation gallery 1 external surface, described waterproofing and leakage-stopping oxidant layer 11 covers be arranged on the external surface of dam foundation gallery 1 completely, and its two ends being arranged in position, dam foundation gallery 1 abutment wall corner embed bed course 4 and loaded filter 5 respectively.Waterproofing and leakage-stopping oxidant layer 11 is made up of the water-proof leak preventer be arranged on dam foundation gallery 1 external surface; During construction, usually first on dam foundation gallery 1 external surface, be coated with water-proof leak preventer, re-lay bed course 4 and loaded filter 5; Waterproofing and leakage-stopping oxidant layer 11 can be avoided in dam foundation gallery 1 work progress as far as possible because temperature or runtime leak because stressed excessive surface produces crack.Preferably, described leakage preventing structure also comprises the pitch impervious barrier 12 be arranged on waterproofing and leakage-stopping oxidant layer 11 surface, and described pitch impervious barrier 12 connects with the upper surface of bed course 4 and loaded filter 5 respectively near the two ends at position, dam foundation gallery 1 abutment wall corner.Pitch impervious barrier 12 is generally made up of the pitch antiseepage film be arranged on waterproofing and leakage-stopping oxidant layer 11 surface, and it also can be made up of the painting bituminous material be located on water-proof leak preventer layer 11 surface certainly; Pitch impervious barrier 12 has to be prevented blending ageing resistace preferably, and the infiltration of this syndeton or dam foundation gallery 1 can be avoided to produce crack and leak, and the base be particularly connected with bank slope at dam foundation gallery 1 covers near boundary line or base covers boundary line sudden change place as far as possible.
As a preferred embodiment of the present invention, more as shown in Figure 1, this syndeton also comprises composite geo-membrane 7; Described composite geo-membrane 7 comprises two parts, and wherein a part is arranged on bed course 4 surface and pitch impervious barrier 12 stream side surface, and another part is arranged in loaded filter 6 surface and pitch impervious barrier 12 downstream side surface.Composite geo-membrane 7 is also called composite impermeable membrane, is usually divided into cloth one film and two cloth one films, has intensity high, and extension property is better, and modulus of deformation is large, acid and alkali-resistance, anticorrosive, ageing-resistant, the features such as barrier performance is good.Two parts composite geo-membrane 7 of upstream and downstream side is set respectively, not only increases the barrier performance of this syndeton, and reduce further the contact gradient between dam body core-wall 2 and dam foundation gallery 1.When composite geo-membrane 7 is set, first with sand or the levelling basal plane of clay, and then lay; Composite geo-membrane 7 should not stretch tight too tight, imbeds end in corrugated, finally on spread composite geo-membrane 7, arranges one deck transition zone; Stone should be avoided in setting up procedure as possible directly to pound on composite geo-membrane 7.
In order to better be fixed on dam foundation gallery 1 by leakage preventing structure and composite geo-membrane 7, described dam foundation gallery 1 is provided with fixed structure.Fixed structure can have numerous embodiments, be preferably the structure shown in Fig. 1, described fixed structure comprises pre-buried being arranged in dam foundation gallery 1 crown and the connector 13 be connected and fixed with waterproofing and leakage-stopping oxidant layer 11 and pitch impervious barrier 12, and be connected and the clamping plate 14 waterproofing and leakage-stopping oxidant layer 11, pitch impervious barrier 12 and composite geo-membrane 7 are fixed with the abutment wall of dam foundation gallery 1, and at least two pieces along the spaced mounting plate of dam foundation gallery 1 length direction.Wherein, connector 13 can be anchor pole, reinforcing bar, steel plate etc., is preferably stone bolt; Connector 13 is generally many, can be to be arranged in dam foundation gallery 1 crown in blossom type, also can be many rows structure that in adjacent two rows, connector 13 shifts to install; Single connector 13 is generally arranged along the radial direction of dam foundation gallery 1 crown.Clamping plate 14 are mainly used in compressing and anchoring composite geo-membrane 7 and leakage preventing structure, and it is bonding with the position usual brushing mulseal that composite geo-membrane 7 is connected, in case seepage occurs at this place.Mounting plate can adopt multiple material to make, and usually adopts metal material to make, arrange last as first through antirust treatment; Mounting plate preferably adopts stainless steel band steel plate to make, and the distance between two pieces of adjacent mounting plates is preferably 10m.
In order to improve fixed effect and application life, 14 at least two pieces, described clamping plate are also arranged along dam foundation gallery 1 length direction interval, and every block clamping plate 14 are all through antirust treatment; Described clamping plate 14 comprise pressure strip and connecting bolt, and described pressure strip overlays on composite geo-membrane 7, and described connecting bolt is arranged on pressure strip and is also connected with the abutment wall of composite geo-membrane 7, pitch impervious barrier 12, waterproofing and leakage-stopping oxidant layer 11 and dam foundation gallery 1 successively.
Concrete, described mounting plate comprises arch band steel plate 151 and vertical band steel plate 152; Described arch band steel plate 151 be arranged on be positioned at dam foundation gallery 1 crown place pitch impervious barrier 12 on the surface, its two ends are connected with the clamping plate 14 on the abutment wall of dam foundation gallery 1 both sides respectively; Described vertical band steel plate 152 be arranged on be positioned at dam foundation gallery 1 abutment wall place composite geo-membrane 7 on the surface, its upper end is connected with clamping plate 14.
Claims (10)
1. the syndeton of dam foundation gallery and dam body core-wall, comprise the dam foundation gallery (1) be arranged on covering layer (3) and the dam body core-wall (2) be arranged on covering layer (3) and dam foundation gallery (1), it is characterized in that: also comprise and to be arranged between dam body core-wall (2) and covering layer (3) and to lay respectively at bed course (4) and the loaded filter (5) of dam foundation gallery (1) side, upstream and downstream, and be arranged on the clay layer (6) between dam foundation gallery (1) and dam body core-wall (2).
2. the syndeton of dam foundation gallery as claimed in claim 1 and dam body core-wall, is characterized in that: in described clay layer (6), the index of plasticity of clay is greater than 15.
3. the syndeton of dam foundation gallery as claimed in claim 1 or 2 and dam body core-wall, is characterized in that: the external surface of described dam foundation gallery (1) is provided with leakage preventing structure.
4. the syndeton of dam foundation gallery as claimed in claim 3 and dam body core-wall, it is characterized in that: described leakage preventing structure comprises the waterproofing and leakage-stopping oxidant layer (11) be arranged on dam foundation gallery (1) external surface, described waterproofing and leakage-stopping oxidant layer (11) covers be arranged on the external surface of dam foundation gallery (1) completely, and its two ends being arranged in position, dam foundation gallery (1) abutment wall corner embed bed course (4) and loaded filter (5) respectively.
5. the syndeton of dam foundation gallery as claimed in claim 4 and dam body core-wall, it is characterized in that: described leakage preventing structure also comprises the pitch impervious barrier (12) be arranged on waterproofing and leakage-stopping oxidant layer (11) surface, described pitch impervious barrier (12) connects with the upper surface of bed course (4) and loaded filter (5) respectively near the two ends at position, dam foundation gallery (1) abutment wall corner.
6. the syndeton of dam foundation gallery as claimed in claim 5 and dam body core-wall, is characterized in that: also comprise composite geo-membrane (7); Described composite geo-membrane (7) comprises two parts, wherein a part is arranged on bed course (4) surface and pitch impervious barrier (12) stream side surface, and another part is arranged in loaded filter (6) surface and pitch impervious barrier (12) downstream side surface.
7. the syndeton of dam foundation gallery as claimed in claim 6 and dam body core-wall, is characterized in that: described dam foundation gallery (1) is provided with fixed structure.
8. the syndeton of dam foundation gallery as claimed in claim 7 and dam body core-wall, it is characterized in that: described fixed structure comprises pre-buried being arranged in dam foundation gallery (1) crown and the connector (13) be connected and fixed with waterproofing and leakage-stopping oxidant layer (11) and pitch impervious barrier (12), and be connected and the clamping plate (14) waterproofing and leakage-stopping oxidant layer (11), pitch impervious barrier (12) and composite geo-membrane (7) are fixed with the abutment wall of dam foundation gallery (1), and at least two pieces along the spaced mounting plate of dam foundation gallery (1) length direction.
9. the syndeton of dam foundation gallery as claimed in claim 8 and dam body core-wall, it is characterized in that: (14) at least two pieces, described clamping plate are also arranged along dam foundation gallery (1) length direction interval, and every block clamping plate (14) are all through antirust treatment; Described clamping plate (14) comprise pressure strip and connecting bolt, described pressure strip overlays on composite geo-membrane (7), and described connecting bolt is arranged on pressure strip and is also connected with the abutment wall of composite geo-membrane (7), pitch impervious barrier (12), waterproofing and leakage-stopping oxidant layer (11) and dam foundation gallery (1) successively.
10. the syndeton of dam foundation gallery as claimed in claim 8 and dam body core-wall, is characterized in that: described mounting plate comprises arch band steel plate (151) and vertical band steel plate (152); Described arch band steel plate (151) be arranged on be positioned at dam foundation gallery (1) crown place pitch impervious barrier (12) on the surface, its two ends are connected with the clamping plate (14) on the abutment wall of dam foundation gallery (1) both sides respectively; Described vertical band steel plate (152) be arranged on be positioned at dam foundation gallery (1) abutment wall place composite geo-membrane (7) on the surface, its upper end is connected with clamping plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510649014.0A CN105239534A (en) | 2015-10-09 | 2015-10-09 | Connecting structure for dam foundation gallery and dam body core wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510649014.0A CN105239534A (en) | 2015-10-09 | 2015-10-09 | Connecting structure for dam foundation gallery and dam body core wall |
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| CN105239534A true CN105239534A (en) | 2016-01-13 |
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| CN201510649014.0A Pending CN105239534A (en) | 2015-10-09 | 2015-10-09 | Connecting structure for dam foundation gallery and dam body core wall |
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| CN106638486A (en) * | 2017-02-09 | 2017-05-10 | 河海大学 | Stage construction method for diaphragm wall and gallery of high-core rock-fill dam |
| CN108178316A (en) * | 2017-12-31 | 2018-06-19 | 北京东方园林环境股份有限公司 | A kind of geomembrane anti-seepage layer protection structure of artificial swamp |
| CN109356101A (en) * | 2018-11-23 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Seepage prevention of dam founda structure in ultra-deep thick-covering |
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| CN109356101A (en) * | 2018-11-23 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Seepage prevention of dam founda structure in ultra-deep thick-covering |
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Application publication date: 20160113 |
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