CN205012288U - Embankment dam pitch core -wall base - Google Patents

Embankment dam pitch core -wall base Download PDF

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Publication number
CN205012288U
CN205012288U CN201520779727.4U CN201520779727U CN205012288U CN 205012288 U CN205012288 U CN 205012288U CN 201520779727 U CN201520779727 U CN 201520779727U CN 205012288 U CN205012288 U CN 205012288U
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CN
China
Prior art keywords
base
dam
pedestal
pitch core
earth
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Withdrawn - After Issue
Application number
CN201520779727.4U
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Chinese (zh)
Inventor
王晓东
王党在
赵永刚
冯军
胡小红
汤雪峰
柏仲生
梁娟
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Powerchina Chengdu Engineering Co Ltd
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Powerchina Chengdu Engineering Co Ltd
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Priority to CN201520779727.4U priority Critical patent/CN205012288U/en
Application granted granted Critical
Publication of CN205012288U publication Critical patent/CN205012288U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses an embankment dam pitch core -wall base, its solved former embankment dam fill the in -process can not be enough in the problem that overflows. This embankment dam pitch core -wall base builds base face and base body including the base, the base is built the base face and is set up on the basement rock, ji mianshang is built at the base to the setting of base body, and the level that the level at base body top built the base face than the dam body is high. The level at base body top is higher than the level that base face was built to the dam body in this base, and consequently, this base exceeds the dam body to be built basic facial branch and can protect the sectional safety in dam body lower part, so the embankment dam can overflow filling the in -process, and then has reduced the height that the upper reaches set up the cofferdam, has reduced the quantity of diversion tunnel, has saved the investment, has practiced thrift the time limit for a project, has optimized the pivot and has arranged.

Description

Earth and rockfill dam pitch core-wall pedestal
Technical field
The utility model belongs to Hydraulic and Hydro-Power Engineering field, is specifically related to a kind of earth and rockfill dam pitch core-wall pedestal.
Background technology
In the earth and rockfill dam of band asphaltic concrete core wall, asphaltic concrete core wall is connected by concrete pedestal with dam body foundation plane.Existing earth and rockfill dam pitch core-wall pedestal, is generally grooving on basement rock and builds the concrete pedestal that top flushes with dam body foundation plane.Because the dam embankment material of pitch earth rockfill dam with central core is mainly granular material; and the top of existing earth and rockfill dam pitch core-wall pedestal flushes with dam body foundation plane and can not protect dam body bottom; in dam embankment process during dam facing overcurrent; dam embankment material will be taken away by current scour; pitch core-wall is also washed destruction; so the earth and rockfill dam arranging existing earth and rockfill dam pitch core-wall pedestal can not be used for overcurrent in the process of filling, need to arrange high cofferdam in the upstream of earth and rockfill dam build place and Diversion Tunnel carries out damming and water conservancy diversion.
Utility model content
The utility model provides a kind of earth and rockfill dam pitch core-wall pedestal, and before which solving, earth and rockfill dam can not be used for the problem of overcurrent in the process of filling.
The utility model solves the technical scheme that its technical problem adopts: earth and rockfill dam pitch core-wall pedestal, comprises pedestal foundation plane and base body; Described pedestal foundation plane is arranged on basement rock, and described base body is arranged on pedestal foundation plane, and the level height at base body top is higher than the level height of dam body foundation plane.
Further, described pedestal foundation plane is arranged on weak weathered rocks layer in basement rock on the surface, or is arranged on the surface of bedrock after consolidation grouting process, or is arranged on the weak weathered rocks layer after consolidation grouting process on the surface.
Further, described base body is provided with the anti-seepage linkage for being connected with pitch core-wall.
Further, the described anti-seepage linkage sealing piece that comprises the arc groove being arranged on base body top, the mulseal layer being arranged on arcuate recess surface and sand asphalt pulp layer and be arranged on along the length direction of base body in arc groove; The lower end of described sealing piece embeds in base body, and the upper end of sealing piece is used for being connected with pitch core-wall.
Be further, the cross section of described base body is trapezoidal, the height H of base body is 8 ~ 12m, and the slope of base body upstream and downstream side surface is 1:0.2 ~ 1:0.3 than i, and the distance L of described arc groove and upstream and downstream, base body top side is 0.5 ~ 1m.
Further, the inside of described base body is provided with irrigation gallery.
Further, described base body and basement rock are linked together by anchor structure.
Further, described anchor structure comprises at least two rows along suitable river to spaced dowel, often arranges the dowel composition be arranged side by side along base body length direction primarily of more than two, and the dowel in adjacent two rows shifts to install.
The beneficial effects of the utility model are: in this pedestal, the level height at base body top is higher than the level height of dam body foundation plane; therefore; this pedestal exceeds the safety that dam body foundation plane part can protect dam body bottom section; so earth and rockfill dam can carry out overcurrent in the process of filling; and then reduce the height that upstream arranges cofferdam, decrease the quantity of Diversion Tunnel, save investment; save the duration, optimize project playout.Anti-seepage linkage is beneficial to this pedestal and is connected with pitch core-wall and the antiseepage of connecting portion.Irrigation gallery, can make the filling construction of curtain grouting in foundation of dam and dam body synchronously carry out, and saves the duration, and is convenient to runtime maintenance, monitoring.Anchor structure makes the connection between this pedestal and basement rock more firm, improves the reliability of this dam foundation.
Accompanying drawing explanation
Fig. 1 is enforcement structural representation of the present utility model;
Be labeled as in figure: pedestal foundation plane 11, base body 12, arc groove 121, mulseal layer 122, sand asphalt pulp layer 123, sealing piece 124, irrigation gallery 125, dowel 126, basement rock 2, dam body foundation plane 21, weak weathered rocks layer 22, pitch core-wall 3, dam embankment material 4.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, earth and rockfill dam pitch core-wall pedestal, comprises pedestal foundation plane 11 and base body 12; Described pedestal foundation plane 11 is arranged on basement rock 2, and described base body 12 is arranged on pedestal foundation plane 11, and the level height at base body 12 top is higher than the level height of dam body foundation plane 21; Level height as herein described refers to height with respect to the horizontal plane, and such as, the level height at base body 12 top refers to base body 12 top height with respect to the horizontal plane.Wherein, the embodiment of pedestal foundation plane 11 on basement rock 2 has multiple, such as: pedestal foundation plane 11 is arranged on weak weathered rocks layer 22 in basement rock 2 on the surface, or is arranged on the basement rock 2 after consolidation grouting process on the surface; Be preferably, pedestal foundation plane 11 be arranged on the weak weathered rocks layer 22 after consolidation grouting process on the surface; In the art, basement rock 2 can divide by completely decomposed, severely-weathered and weak weathering according to the difference of rate of decay, above-mentioned " completely decomposed, severely-weathered and weak weathering " term has generally acknowledged precise meaning in the art, and weak weathered rocks layer 22 described herein represents that in basement rock 2, rate of decay is the rock stratum of weak weathering; Usually, first dam body foundation plane 21 is set on basement rock 2 surface, then excavate by dam body foundation plane 21 groove that cross section is inverted trapezoidal downwards, trench bottom is excavated to weak weathered rocks layer 22 surface, then consolidation grouting process is carried out to weak weathered rocks layer 22, finally pedestal foundation plane 11 is set on the surface at the weak weathered rocks layer 22 after consolidation grouting process.Base body 12 is generally formed by concreting, and in order to better protect dam body, base body 12 top needs the height of water level exceeding overcurrent in flood season, the level height 5 ~ 11m higher than the level height of dam body foundation plane 21 at usual base body 12 top; Owing to being at the following overcurrent in base body 12 top, during overcurrent, dam embankment material 4 is by the protection of base body 12, and be not easily pulled away, dam body Failure probability is less; In order to better protect dam body, overflow earth dam also should be taked at upstream and downstream dam facing pneumatically placed concrete, and downstream dam facing lays anti-filter and concrete slab, and arranges the safeguard measures such as anchor block spats, reinforced gabion and boulder spats.
Consider that pitch core-wall 3 is complicated with the connecting portion stress deformation of this pedestal, this place is the key position of antiseepage, therefore the anti-seepage effect in order to make this pedestal and pitch core-wall 3 better be connected and improve connecting portion, described base body 12 is provided with the anti-seepage linkage for being connected with pitch core-wall 3; Preferably, as shown in Figure 1, the described anti-seepage linkage sealing piece 124 that comprises the arc groove 121 being arranged on base body 12 top, the mulseal layer 122 being arranged on arc groove 121 surface and sand asphalt pulp layer 123 and be arranged on along the length direction of base body 12 in arc groove 121; The lower end of described sealing piece 124 embeds in base body 12, and the upper end of sealing piece 124 is used for being connected with pitch core-wall 3.Arc groove 121 increases the area of base body 12 and pitch core-wall 3 joint face, and then improves connection effect; Mulseal layer 122 and sand asphalt pulp layer 123 make base body 12 and pitch core-wall 3 better combine; Sealing piece 124 is for sealing antiseepage, and it is arranged on the anti-seepage effect that improve this connecting portion between base body 12 and pitch core-wall 3; Sealing piece 124 generally selects copper water stop.
Concrete, more as shown in Figure 1, the cross section of described base body 12 is trapezoidal, trapezium structure has better support, holds up effect, is a kind of preferred structure of base body 12; The height H of base body 12 is 8 ~ 12m, and base body 12 top of this altitude range, all the time higher than the height of water level of overcurrent in flood season, is beneficial to and ensures that this pedestal is to the protected effect of dam body; The slope of the upstream and downstream side surface of base body 12 is 1:0.2 ~ 1:0.3 than i, and this slope, than the base body 12 upstream and downstream side surface of scope, ensure that the structural strength of base body 12 on the one hand, and support effect is better, in turn saves cost on the other hand; Better to be connected with pitch core-wall 3 and the construction of pitch core-wall 3 to be beneficial to this pedestal, described arc groove 121 is 0.5 ~ 1m with the distance L of upstream and downstream, base body 12 top side.
As a kind of preferred version of the present utility model, more as shown in Figure 1, the inside of described base body 12 is provided with irrigation gallery 125, and irrigation gallery 125 is arranged along the length direction of base body 12 usually; Owing to having irrigation gallery 125, so base body 12 of can first constructing carries out curtain grouting to the dam foundation again, and the filling construction of curtain grouting and dam body can synchronously carry out, and saves the duration, and is convenient to runtime maintenance, monitoring.
More firm in order to make base body 12 be connected with basement rock 2, improve the reliability of this dam foundation, more as shown in Figure 1, described base body 12 is linked together by anchor structure with basement rock 2.Preferably, described anchor structure comprises at least two rows along suitable river to spaced dowel 126, often arranges the dowel 126 be arranged side by side along base body 12 length direction primarily of more than two and forms, and the dowel 126 in adjacent two rows shifts to install; Dowel 126 arranges the anchored force that can make full use of every root dowel 126 like this, improves the anchoring effect of anchor structure entirety further.
For the method for above-mentioned earth and rockfill dam pitch core-wall pedestal of constructing, comprise the following steps:
Step a, the river of upstream, place, section to be onstructed for dam to be dammed; Damming to be generally the structure such as cofferdam and Diversion Tunnel be set in upstream river;
Step b, excavation riverbed are surperficial to basement rock 2, and using basement rock 2 surface as dam body foundation plane 21;
Step c, pedestal foundation plane 11 is set on basement rock 2; Pedestal foundation plane 11 is generally arranged on weak weathered rocks layer 22 in basement rock 2 on the surface, or is arranged on the basement rock 2 after consolidation grouting process on the surface; Then on pedestal foundation plane 11, build base body 12, the top of base body 12 is built to the level height of level height higher than dam body foundation plane 21; Because the level height at base body 12 top is higher than the level height of dam body foundation plane 21, therefore, the part that base body 12 exceeds dam body foundation plane 21 can protect the safety of dam body bottom section, so earth and rockfill dam can carry out overcurrent in the process of filling, and then reduce the height that upstream arranges cofferdam, decrease the quantity of Diversion Tunnel, save investment, save the duration;
Steps d, along the length direction of base body 12, arc groove 121 is set at the top of base body 12, and dabbing process is carried out to arc groove 121 surface; Then, mulseal layer 122 and sand asphalt pulp layer 123 is sprayed successively from lower to upper on the surface at arc groove 121; Finally, the sealing piece 124 that lower end embeds in base body 12, sand asphalt pulp layer 123 upper surface is exposed in upper end is set in arc groove 121.
Preferably, in the step c of above-mentioned construction method, be excavated to weak weathered rocks layer 22 surface downwards by basement rock 2 surface, and consolidation grouting process is carried out to weak weathered rocks layer 22; Then, using weak weathered rocks layer 22 surface as pedestal foundation plane 11; Then, dowel 126 is set in weak weathered rocks layer 22, and makes the upper end of dowel 126 expose pedestal foundation plane 11; Again then, pedestal foundation plane 11 is built the base body 12 that inside has irrigation gallery 125.

Claims (8)

1. earth and rockfill dam pitch core-wall pedestal, is characterized in that: comprise pedestal foundation plane (11) and base body (12); Described pedestal foundation plane (11) is arranged on basement rock (2), described base body (12) is arranged on pedestal foundation plane (11), and the level height at base body (12) top is higher than the level height of dam body foundation plane (21).
2. earth and rockfill dam pitch core-wall pedestal as claimed in claim 1, it is characterized in that: described pedestal foundation plane (11) is arranged on weak weathered rocks layer (22) in basement rock (2) on the surface, or be arranged on the basement rock (2) after consolidation grouting process on the surface, or be arranged on the weak weathered rocks layer (22) after consolidation grouting process on the surface.
3. earth and rockfill dam pitch core-wall pedestal as claimed in claim 1, is characterized in that: described base body (12) is provided with the anti-seepage linkage for being connected with pitch core-wall (3).
4. earth and rockfill dam pitch core-wall pedestal as claimed in claim 3, is characterized in that: the sealing piece (124) that described anti-seepage linkage comprises the arc groove (121) being arranged on base body (12) top, the mulseal layer (122) being arranged on arc groove (121) surface and sand asphalt pulp layer (123) and is arranged on along the length direction of base body (12) in arc groove (121); The lower end of described sealing piece (124) embeds in base body (12), and the upper end of sealing piece (124) is used for being connected with pitch core-wall (3).
5. earth and rockfill dam pitch core-wall pedestal as claimed in claim 4, it is characterized in that: the cross section of described base body (12) is trapezoidal, the height H of base body (12) is 8 ~ 12m, the slope of base body (12) upstream and downstream side surface is 1:0.2 ~ 1:0.3 than i, and described arc groove (121) is 0.5 ~ 1m with the distance L of base body (12) upstream and downstream, top side.
6. the earth and rockfill dam pitch core-wall pedestal according to any one of claim 1 to 5, is characterized in that: the inside of described base body (12) is provided with irrigation gallery (125).
7. the earth and rockfill dam pitch core-wall pedestal according to any one of claim 1 to 5, is characterized in that: described base body (12) and basement rock (2) are linked together by anchor structure.
8. earth and rockfill dam pitch core-wall pedestal as claimed in claim 7, it is characterized in that: described anchor structure comprises at least two rows along suitable river to spaced dowel (126), often arrange dowel (126) composition be arranged side by side along base body (12) length direction primarily of more than two, and the dowel (126) in adjacent two rows shifts to install.
CN201520779727.4U 2015-10-09 2015-10-09 Embankment dam pitch core -wall base Withdrawn - After Issue CN205012288U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520779727.4U CN205012288U (en) 2015-10-09 2015-10-09 Embankment dam pitch core -wall base

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520779727.4U CN205012288U (en) 2015-10-09 2015-10-09 Embankment dam pitch core -wall base

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Publication Number Publication Date
CN205012288U true CN205012288U (en) 2016-02-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105239535A (en) * 2015-10-09 2016-01-13 中国电建集团成都勘测设计研究院有限公司 Asphalt core wall base and construction method thereof
CN106638487A (en) * 2017-01-19 2017-05-10 中国电力建设股份有限公司 Combined water retaining dam and construction method of combined water retaining dam
CN111321706A (en) * 2020-02-25 2020-06-23 中国电建集团华东勘测设计研究院有限公司 Clay core wall dam structure and construction method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105239535A (en) * 2015-10-09 2016-01-13 中国电建集团成都勘测设计研究院有限公司 Asphalt core wall base and construction method thereof
CN105239535B (en) * 2015-10-09 2018-03-23 中国电建集团成都勘测设计研究院有限公司 Pitch core-wall pedestal and its construction method
CN106638487A (en) * 2017-01-19 2017-05-10 中国电力建设股份有限公司 Combined water retaining dam and construction method of combined water retaining dam
CN106638487B (en) * 2017-01-19 2019-10-25 中国电力建设股份有限公司 A kind of construction method combining checkdam and the combined dam
CN111321706A (en) * 2020-02-25 2020-06-23 中国电建集团华东勘测设计研究院有限公司 Clay core wall dam structure and construction method thereof

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AV01 Patent right actively abandoned

Granted publication date: 20160203

Effective date of abandoning: 20180323

AV01 Patent right actively abandoned