CN207211084U - The arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum - Google Patents
The arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum Download PDFInfo
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- CN207211084U CN207211084U CN201721038483.XU CN201721038483U CN207211084U CN 207211084 U CN207211084 U CN 207211084U CN 201721038483 U CN201721038483 U CN 201721038483U CN 207211084 U CN207211084 U CN 207211084U
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Abstract
The utility model discloses a kind of arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum, belongs to concrete gravity dam technical field.The axis of dam of concrete gravity dam is arranged as being convex to the arc line shaped of upstream by the utility model, the toe of high monolith in concrete gravity dam is set upstream to retract, fall on hard rock, and the dam heel bottom of high monolith uses " bridge " formula Extended chemotherapy in concrete gravity dam, the dam of high monolith is called in person across soft rock, fall on hard rock.The utility model passes through planar arc arrangement and " bridge " formula Extended chemotherapy, so that the toe of riverbed Overflow Section that is mainly pressurized of dam runtime and dam heel are seated on the good hard rock of condition, avoid dam discontinuity, deform the problem of big, and the utility model saves the excavated volume and amount of concrete of dam foundation, construction cost is greatly reduced, shortens the duration.
Description
Technical field
The utility model is related to concrete gravity dam technical field, and in particular to be on a kind of soft and hard alternation steep dip rock stratum
The arrangement of concrete gravity dam.
Background technology
Concrete gravity dam is mainly conducted oneself with dignity, upstream and downstream water pressure, substrate uplift pressure as a kind of water retaining structure by dam body
Deng load action.In the presence of these loads, gravity dam substrate will produce compression.In the normal impounding and operation phase, maximum pressure
Stress generally occurs in toe；When having constructed the phase of building or low water level, maximum crushing stress is likely to occur in dam heel.
For the homogeneous dam foundation, by foundation excavation to after meeting the basement rock of stress condition, each portion of dam heel, toe and substrate
Position, all falls within identical rock mass, the stress condition of each monolith, is not influenceed by position distribution.For the heterogeneous dam foundation, dam
Heel, the position that is fallen of toe are different, and stress condition is by difference, dam foundation discontinuity.Steep dip for from Yokogawa to soft and hard alternation
Rock stratum, this case are especially notable.Because toe following current to position it is different, the toe of some monoliths will fall on soft rock, this
Larger harm will be brought to this larger position that is pressurized of the heel of the dam of concrete gravity dam and toe, especially toe, such as held
Stress concentration, the decline of Against Sliding Stability performance at load power deficiency, the soft or hard change of the dam foundation etc..
For improve it is uneven on the basis of dam stress condition, in traditional design, generally use is excavated weak part and carried out
The mode of concrete replacement, in the case of soft rock mass accounting is larger, excavated volume and concrete backfill amount are all larger；Also adopt
Fold-line-shaped dam line arrangement is taken to avoid the gravity dam engineering such as soft rock mass, Ru Longtan, Burner zone, Baise, Ankang.
Longtan hydropower station, it is host layer that river bed dam section, which is located at the higher sandstone of intensity, and relatively weak argillite rock stratum only exists
The higher left bank hillside of foundation plane by, for avoid the influence of the creep rock mass of left bank upstream and right bank coombe and reduce excavate and
Concrete works amount, the two sides axis of dam are upstream turned back 27 ° and 30 ° respectively, ultimately form a fold-line-shaped gravity dam dam axle
Line.
The Burner zone gravity axis of dam is upstream transferred in two sides with 54 ° of angle, and the dam foundation is seated lithology as huge thickness to thickness
In the T33 rock groups of layer sandstone, bad terrene is avoided, is simplified dam foundation treatment work.
Baise RCC dam, influenceed by right bank topographic and geologic, the big axis of dam is orthogonal with river in riverbed part, the right bank axis of dam
It is arranged to be folded to upstream along diabase spread, left bank is slightly folded to downstream.
Safe and comfortable concrete gravity dam, employs broken line type dam line, the substantially vertical downstream river course of overflow segment axis, left bank in order to
Downstream turn 35 ° not across F3 tomographies axis, in order to adjust dam foundation stress state, right bank dam line has also downstream turned 10 ° of angles,
It preferably make use of river topography feature.The dam line of use makes the dam foundation fall on harder, complete rock mass, avoids regionality
Tomography F3 and the F10 fault belts in intrusive body downstream, avoid downstream sheet landslide distribution area and riverbed pool landform.
Above-mentioned engineering, its weak or broken basement rock local distribution in the range of the dam foundation, for Yokogawa to steep dip, run through
The rock stratum of the soft and hard alternation of the whole dam foundation, it is that can not ensure all monolith dams of whole gravity dam only by the local deflection of dam line
Heel, toe are fallen within harder, complete rock mass, though and prior art also has Yokogawa is mixed on soft and hard alternation steep dip rock stratum
The arrangement for coagulating native gravity dam is studied, but the toe of riverbed Overflow Section that is mainly pressurized of dam runtime and dam heel are fallen within
Soft stratum, and be to improve dam heel, toe stress condition, dam heel, toe soft rock need to be deep-cut and use concrete to change and filled out,
Excavate rock and fill concrete amount is huge, construction period length.
The content of the invention
The purpose of this utility model be in view of the above-mentioned problems of the prior art, provide a kind of stability under loading, deformation it is small,
Excavated volume is few, on the soft and hard alternation steep dip rock stratum of short time limit concrete gravity dam arrangement.
To achieve the above object, the utility model adopts the following technical scheme that：
The arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum, including left bank non-overflow section of dam, riverbed overflow
Monolith and right bank non-overflow section of dam；The riverbed Overflow Section is between left bank non-overflow section of dam and right bank non-overflow section of dam；
The axis of dam of each monolith is arranged as camber line in the left bank non-overflow section of dam, riverbed Overflow Section and right bank non-overflow section of dam,
And the toe of each monolith is respectively positioned on hard rock in left bank non-overflow section of dam, riverbed Overflow Section and right bank non-overflow section of dam；Institute
The dam heel bottom for stating high monolith in left bank non-overflow section of dam, riverbed Overflow Section and right bank non-overflow section of dam is provided with the expansion of " bridge " formula
Big basis, and the dam heel of high monolith is located on hard rock in left bank non-overflow section of dam, riverbed Overflow Section and right bank non-overflow section of dam.
Further, the upstream of described " bridge " formula Extended chemotherapy rise slope and left bank non-overflow section of dam, riverbed Overflow Section and
The upstream folded slope linking of high monolith in right bank non-overflow section of dam.
Further, the slope ratio that slope is played in the upstream of described " bridge " formula Extended chemotherapy is 1:1.
The utility model has the advantages that：
The utility model passes through planar arc arrangement and " bridge " formula Extended chemotherapy so that the river that the dam runtime is mainly pressurized
The toe of bed Overflow Section and dam heel are seated on the good hard rock of condition, avoid Yokogawa to concrete on steep dip soft and hard alternation rock stratum
The dam heel of gravity dam falls on soft rock, caused by stress and problem on deformation, and the utility model saves concrete gravity
The excavated volume and amount of concrete of dam foundation rock, greatly reduce construction cost, shorten the duration.
Brief description of the drawings
Fig. 1 is schematic diagram of the Yokogawa to concrete gravity dam arrangement on soft and hard alternation steep dip rock stratum in the prior art；
Fig. 2 is Yokogawa concrete weight into concrete gravity dam arrangement on soft and hard alternation steep dip rock stratum in the prior art
The diagrammatic cross-section on power dam；
Fig. 3 is the schematic diagram of concrete gravity dam arrangement on the utility model soft and hard alternation steep dip rock stratum；
Fig. 4 is concrete gravity dam in concrete gravity dam arrangement on the utility model soft and hard alternation steep dip rock stratum
Diagrammatic cross-section.
In figure：Left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow section of dam 3, toe 4, hard rock 5, " bridge "
Slope 8, soft rock 9, upstream folded slope 10, downstream dam slope 11 are played in formula Extended chemotherapy 6, dam heel 7, upstream.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Mu Ruo Hydropower Projects are located at Malaysian tropical rain forest area, the place rock mass rock stratum category Eocene epoch in Palaeogene shore
Marine facies, the 3rd be Bei Lajia (Belaga) group Pelagus sections stratum, as shown in Figures 1 to 4, the rock stratum steep dip, the He of hard rock 5
Soft rock 9 is alternate, the thickness of middle part thicker position hard rock 5 about 110m.
As depicted in figs. 1 and 2, prior art is entered using the straight line axis of dam to concrete gravity dam in Mu Ruo Hydropower Projects
Row arrangement, on soft rock 9, it is excessive that this will produce the concrete gravity dam dam foundation for toe 4 and the dam heel 7 of riverbed Overflow Section 2
Deformation, and then causes dam body bottom tension excessive, or even by concrete gravity dam drawing crack, destroys the globality of dam body, and then
7 seepage prevention systems of dam heel are destroyed, the contact area of concrete gravity dam and basement rock is reduced, jeopardizes Stability of Sliding Resistance of Concrete peace
Quan Xing.
Cloth of the utility model aiming at Yokogawa in the prior art to concrete gravity dam on soft and hard alternation steep dip rock stratum
Put the improvement that structure stress is uneven, deformation is big, excavated volume is big, construction period length is made.
As shown in Figure 3 and Figure 4, on the utility model soft and hard alternation steep dip rock stratum concrete gravity dam arrangement, bag
Include left bank non-overflow section of dam 1 (including 8 monoliths), riverbed Overflow Section 2 (including 3 monoliths) and (bag of right bank non-overflow section of dam 3
Include 10 monoliths)；The riverbed Overflow Section 2 is between left bank non-overflow section of dam 1 and right bank non-overflow section of dam 3；The left side
The axis of dam of each monolith is arranged as camber line, camber line in bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow section of dam 3
Radius is 893m, and axis of dam overall length is 430.23m, wherein, each monolith is along a length of 20.26m of the axis of dam, phase in riverbed Overflow Section
Adjacent monolith transverse joint central angle is 1.3 °, and each in left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow section of dam 3
The toe 4 of monolith is respectively positioned on hard rock 5；The left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow section of dam 3
Dam 7 bottoms of heel of middle high monolith are provided with " bridge " formula Extended chemotherapy 6, wherein, the slope on slope 8 is played in the upstream of " bridge " formula Extended chemotherapy 6
Than being 1: 0.2 for the slope ratio of high monolith in 1: 1, with left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow section of dam 3
Upstream folded slope 10 be connected so that high monolith in left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow section of dam 3
Each foundation upstream expands 5m~10m, ensures left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow dam
The dam heel 7 of high monolith is on hard rock 5 in section 3, in addition, left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow
The slope ratio of the downstream dam slope 11 of each monolith of high monolith is 1: 0.8 in monolith 3.
Construct the method for the arrangement of concrete gravity dam on above-mentioned soft and hard alternation steep dip rock stratum, comprise the following steps：
1) according to the lithological characteristic of soft and hard alternation steep dip rock stratum, soft and hard alternation steep dip rock stratum is subjected to soft rock 9 and hard rock 5
Rock section divides；
2) the rock section divided according to step 1) selects left bank non-overflow section of dam 1, riverbed Overflow Section 2 in concrete gravity dam
With the arrangement rock section of each monolith of right bank non-overflow section of dam 3；
3) by each of left bank non-overflow section of dam 1 in concrete gravity dam, riverbed Overflow Section 2 and right bank non-overflow section of dam 3
Monolith arrangement rock section selected along step 2) is arranged, wherein, the axis of dam of concrete gravity dam is arranged as being convex to upstream
Arc line shaped, the toe 4 of high monolith in concrete gravity dam is upstream retracted, fall on hard rock 5；
4) in concrete gravity dam left bank non-overflow section of dam 1, riverbed Overflow Section 2 and right bank non-overflow section of dam 3 height
7 bottoms are called in person using " bridge " formula Extended chemotherapy 6 in the dam of monolith, the dam of high monolith is called in person 7 across soft rock 9, fall on hard rock 5.
Other parts not being described in detail belong to prior art.
Claims (3)
1. the arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum, including left bank non-overflow section of dam (1), riverbed overflow
Monolith (2) and right bank non-overflow section of dam (3)；The riverbed Overflow Section (2) is located at left bank non-overflow section of dam (1) and right bank is non-excessive
Between stream monolith (3), it is characterised in that：The left bank non-overflow section of dam (1), riverbed Overflow Section (2) and right bank non-overflow dam
The axis of dam of each monolith is arranged as camber line in section (3), and left bank non-overflow section of dam (1), riverbed Overflow Section (2) and right bank are non-
The toe (4) of each monolith is respectively positioned on hard rock (5) in Overflow Section (3)；The left bank non-overflow section of dam (1), riverbed overflow
Dam heel (7) bottom of high monolith is provided with " bridge " formula Extended chemotherapy (6), and left bank in monolith (2) and right bank non-overflow section of dam (3)
The dam heel (7) of high monolith is located at hard rock (5) in non-overflow section of dam (1), riverbed Overflow Section (2) and right bank non-overflow section of dam (3)
On.
2. the arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum according to claim 1, it is characterised in that：
Slope (8) are played in the upstream of " bridge " the formula Extended chemotherapy (6) and left bank non-overflow section of dam (1), riverbed Overflow Section (2) and right bank are non-
Upstream folded slope (10) linking of high monolith in Overflow Section (3).
3. the arrangement of concrete gravity dam, its feature exist on soft and hard alternation steep dip rock stratum according to claim 1 or 2
In：The slope ratio that slope (8) are played in the upstream of " bridge " the formula Extended chemotherapy (6) is 1: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721038483.XU CN207211084U (en) | 2017-08-18 | 2017-08-18 | The arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum |
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| CN201721038483.XU CN207211084U (en) | 2017-08-18 | 2017-08-18 | The arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326873A (en) * | 2017-08-18 | 2017-11-07 | 长江勘测规划设计研究有限责任公司 | The arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326873A (en) * | 2017-08-18 | 2017-11-07 | 长江勘测规划设计研究有限责任公司 | The arrangement of concrete gravity dam on soft and hard alternation steep dip rock stratum |
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