CN215289983U - Arch dam structure suitable for deep cutting river valley - Google Patents
Arch dam structure suitable for deep cutting river valley Download PDFInfo
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- CN215289983U CN215289983U CN202120542984.1U CN202120542984U CN215289983U CN 215289983 U CN215289983 U CN 215289983U CN 202120542984 U CN202120542984 U CN 202120542984U CN 215289983 U CN215289983 U CN 215289983U
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Abstract
The utility model discloses an arch dam structure suitable for deep cut valley, including the arch dam body, the aforesaid arch dam body both sides are met with both sides dam abutment basement rock, and arch dam body bottom is provided with arch base, and arch base both sides hunch end stridees across deep cut valley foundation broken belt and sits on the complete basement rock of both banks mountain body; the bottom surface of the arched base is an arc-shaped curved surface to form an arched structure, and the top surface is a plane. The utility model discloses an arched dam structure has set up the arch base in arched dam body bottom and has supported as the basis, and the both sides arch end of arch base stridees across deep-cut valley basis broken zone (overburden) and is located on the complete basement rock of both sides mountain. The arch dam body and the arch base form an arch-up integral structure, water pressure borne by the arch dam body is transmitted to mountains on two sides and the arch bases through an arch effect, force borne by the arch bases is transmitted to bedrocks on two banks through the arch effect, the integral stability of the dam is guaranteed, the engineering quantity of excavation, filling and foundation treatment is reduced, the construction period is shortened, and the engineering investment is reduced.
Description
Technical Field
The utility model belongs to the technical field of hydraulic and hydroelectric engineering, concretely relates to arch dam structure suitable for deep cut river valley.
Background
An arch dam is a dam that arches upstream and acts as an arch in the structure. The horizontal section of the arch dam is formed by a curved arch, two ends of the arch dam are supported on bedrocks on two sides, the vertical section of the arch dam is in a cantilever beam form, and the bottom of the arch dam is located on the bedrocks. The arch dam generally depends on the action of an arch, namely, the counter force of arch seats at two ends is utilized, and simultaneously, the stability of a dam body is maintained by means of self weight. The arch dam structure utilizes the arch effect principle, fully utilizes the action of the thick hills of the dam shoulders at the two sides, ensures the stability and the safety of the dam, simultaneously greatly reduces the size section of the dam structure, reduces the engineering quantity and the investment, and shortens the construction period.
In the prior art, the energy construction group Guangxi hydropower engineering office of China, Inc.; the utility model discloses a utility model patent (publication number is CN207775831U) of Datang Xuanwei hydroelectricity development Limited company discloses an asymmetric hyperbolic roller compacted concrete arch dam structure, and hyperbolic arch dam body all adopts the curve structure along vertical and horizontal direction, adopt the normal concrete tertiary system between the dam foundation of hyperbolic arch dam body and the riverbed, adopt high pressure consolidation grouting post and conventional consolidation grouting post to link between normal concrete tertiary system and the riverbed; follow supreme first grout drainage gallery, first drainage gallery and the second drainage gallery of having set gradually down along hyperbolic arch dam body, be provided with the sand washing hole in the middle part position of hyperbolic arch dam body, the top of hyperbolic arch dam body sets up the middle pier, be provided with the overflow pore between the middle pier, install overflow radial gate on the overflow pore. The arch dam structure can be well adapted to karst geological conditions, and meanwhile, a good mechanical structure is adopted by a hyperbolic structure.
However, for narrow valleys with good geological conditions of mountains on two sides, the arch dam is often the first choice in engineering, but for narrow valleys, due to long-time weathering and erosion cutting effects, a broken zone or a deep covering layer with a certain thickness is formed on the valley foundation, and the requirement of the bearing capacity of the dam foundation is difficult to meet. In order to solve the problem, the construction is carried out by means of foundation deep digging or foundation reinforcement treatment, but the corresponding construction amount and investment are greatly increased. Therefore, a more reasonable foundation treatment form is required for the deep cut valley arch dam structure to solve the problem that a valley foundation broken zone or a deep covering layer cannot meet the requirement of the foundation bearing capacity of the foundation building surface of the dam.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is to the higher great shortcoming that leads to dam foundation excavation volume and dam body filling engineering volume of conventional arch dam structure foundation bearing capacity requirement, provides an arch dam structure suitable for deep cut valley to overcome the not enough that prior art exists.
The utility model discloses a realize like this:
an arch dam structure suitable for deep cutting of river valleys comprises an arch dam body, wherein two sides of the arch dam body are connected with foundation rocks of dam shoulders on two sides, an arch base is arranged at the bottom of the arch dam body, and arch ends on two sides of the arch base cross over a deep cutting river valley foundation crushing zone and are located on the complete foundation rocks of the mountain bodies on two banks; the bottom surface of the arched base is an arc-shaped curved surface to form an arched structure, and the top surface is a plane.
Wherein, the arch dam body and the arch base are of an integral structure.
Compared with the prior art, the utility model discloses an arched dam structure has set up the arch base in arched dam body bottom and has supported as the basis, and the both sides hunch-end of arch base stridees across the broken area of deep-cut valley basis (overburden) and is located on the complete basement rock of both sides mountain body. The arch dam body and the arch base form an arch-up integral structure, water pressure borne by the arch dam body is transmitted to mountain bodies on two sides and the arch bases through an arch effect, force borne by the arch bases is transmitted to base rocks on two sides through the arch effect, the integral stability of the dam is guaranteed, the requirement of the arch dam on the bearing capacity of the foundation of the valley foundation is lowered, the height of the dam can be lowered, the excavation and filling engineering quantity and the foundation treatment engineering quantity are greatly reduced, the construction period is shortened, and the engineering investment is reduced.
Drawings
FIG. 1 is a typical cross-sectional view of the dam axis of the present invention;
fig. 2 is a schematic view of the three-dimensional structure of the present invention.
Description of reference numerals: 1-bedrock; 2-a base breaker strip; 3-arch dam body; 4-arched base.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 and 2, the utility model comprises the following components: bedrock 1, foundation crushing zone 2 (overburden), arch dam body 3 and arch base 4.
Wherein, two sides of the arch dam body 3 are connected with the dam abutment bedrocks 1 at two sides, and the excavation depth of the dam abutment bedrocks 1 can be determined according to the bearing capacity requirement of the foundation surface and the geological conditions.
An arch base 4 is arranged at the bottom of the arch dam body 3, arch ends at two sides of the arch base 4 span the deep cut valley foundation broken zones 2 (covering layers) and are located on the complete bedrock 1 of the mountain bodies at two sides. The bottom surface of the arch base 4 is an arc curved surface to form an arch structure, and the top surface is a plane to facilitate the construction of the upper arch dam body 3. The arched base 4 is cast by concrete with the strength not lower than C20, the thickness can be determined by structural stress calculation according to the actual engineering situation, and the arched base is prevented from bearing tensile stress.
The arch dam body 3 and the arch base 4 are of an integral structure, and a structural joint should not be formed between the arch dam body 3 and the arch base 4, so that the integral stress of the arch dam body 3 and the arch base 4 is ensured, the integral stability of the dam is ensured, and the requirement of the arch dam on the foundation bearing capacity of the river valley foundation is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides an arch dam structure suitable for deep cut river valley, includes arch dam body (3), its characterized in that: the two sides of the arch dam body (3) are connected with the bedrocks (1) of the dam shoulders at the two sides, the bottom of the arch dam body (3) is provided with an arch base (4), and arch ends at the two sides of the arch base (4) span the deep cut valley foundation crushing zone (2) and are located on the complete bedrocks (1) of the mountain bodies at the two banks; the bottom surface of the arched base (4) is an arc-shaped curved surface to form an arched structure, and the top surface is a plane.
2. An arch dam structure adapted for use in deep cutting a river valley according to claim 1 wherein: the arch dam body (3) and the arch base (4) are of an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120542984.1U CN215289983U (en) | 2021-03-16 | 2021-03-16 | Arch dam structure suitable for deep cutting river valley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120542984.1U CN215289983U (en) | 2021-03-16 | 2021-03-16 | Arch dam structure suitable for deep cutting river valley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215289983U true CN215289983U (en) | 2021-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120542984.1U Active CN215289983U (en) | 2021-03-16 | 2021-03-16 | Arch dam structure suitable for deep cutting river valley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215289983U (en) |
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2021
- 2021-03-16 CN CN202120542984.1U patent/CN215289983U/en active Active
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