CN210459133U - Gravity dam foundation drainage structures - Google Patents
Gravity dam foundation drainage structures Download PDFInfo
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- CN210459133U CN210459133U CN201921220165.4U CN201921220165U CN210459133U CN 210459133 U CN210459133 U CN 210459133U CN 201921220165 U CN201921220165 U CN 201921220165U CN 210459133 U CN210459133 U CN 210459133U
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Abstract
The utility model relates to a gravity dam foundation drainage structure, which belongs to the technical field of gravity dam engineering and comprises a vertical drainage hole, wherein the vertical drainage hole is arranged in a dam foundation, one end part of the vertical drainage hole is positioned on a foundation surface of the dam foundation, the gravity dam foundation drainage structure also comprises a vertical drainage pipe, a first horizontal drainage pipe and a second horizontal drainage pipe, and the vertical drainage pipe, the first horizontal drainage pipe and the second horizontal drainage pipe are all arranged in a dam body; the first horizontal drainage pipe is located on the building surface of the dam foundation, one end of the vertical drainage pipe is connected with the vertical drainage hole, and the other end of the vertical drainage pipe is connected with the second horizontal drainage pipe. This drainage structures can reduce the setting of the internal corridor of dam, reduces the requirement to the corridor, is convenient for construct and reduce the cost, through pre-buried vertical drain pipe, second horizontal drain pipe, can avoid punching in the concrete dam body of pouring to reduce the harm to dam body, reinforcing bar, condenser tube and monitoring instrument etc. also more conveniently be under construction, practice thrift the time limit for a project.
Description
Technical Field
The utility model relates to a gravity dam foundation drainage structures belongs to gravity dam engineering technical field.
Background
In order to ensure the safety of the gravity dam, the internal seepage water of the dam foundation needs to be drained. The internal seepage water of the dam foundation is discharged along the main drainage hole and the auxiliary drainage hole. At present, the construction mode of a main drainage hole and an auxiliary drainage hole is as follows: the dam foundation is characterized in that longitudinal and transverse galleries are reserved in the dam body, after consolidation grouting and curtain grouting of the dam foundation of the dam body are completed, auxiliary drain holes and main drain holes are drilled in the galleries and the dam foundation rock mass, and water seepage in the dam foundation rock mass can be drained to an inner drain ditch of the galleries through the main drain holes and the auxiliary drain holes during operation and then drained to the outside of the dam. In the method, a gallery is required to be arranged in a dam body, the cross section of the gallery needs a certain height and width to meet the requirements of drilling and the like, and holes in the dam body deteriorate the local stress condition of the dam body, so that measures such as improving the concrete strength near the gallery and laying steel bars are required, the construction period is increased due to the storage of the steel bars and the like, and certain engineering investment is increased; secondly, when the concrete in the dam body drills drainage holes in the later period, the integrity of the concrete and steel bars of the dam body can be damaged, or temperature control measures such as cooling water pipes in the dam can be damaged, or monitoring facilities such as a dam foundation crack meter can be damaged, and the dam body is damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a gravity dam foundation drainage structures that the cost is lower, convenient construction, harm is less to the dam body is provided.
The utility model provides a technical scheme that its technical problem adopted is: a drainage structure of a dam foundation of a gravity dam comprises vertical drainage holes, a vertical drainage pipe, a first horizontal drainage pipe and a second horizontal drainage pipe, wherein the vertical drainage holes are formed in the dam foundation, one end parts of the vertical drainage holes are located on a foundation surface of the dam foundation, and the vertical drainage pipe, the first horizontal drainage pipe and the second horizontal drainage pipe are all arranged in a dam body;
the first horizontal drain pipe is located on the building base surface of the dam foundation, an outlet of the first horizontal drain pipe is located on the outer side of the downstream dam site, one end of the vertical drain pipe is connected with the vertical drain hole, the other end of the vertical drain pipe is connected with the second horizontal drain pipe, and an outlet of the second horizontal drain pipe is located on the outer side of the downstream dam site.
Furthermore, the first horizontal drainage pipe and a consolidation grouting hole arranged on the dam foundation are staggered.
Furthermore, the first horizontal drainage pipe is fixed on a foundation surface of the dam foundation through anchor bars.
Further, the outer surfaces of the vertical water drainage pipe, the first horizontal water drainage pipe and the second horizontal water drainage pipe are provided with protective layers.
Further, the height of the vertical drain pipe is 1-3 m.
The utility model has the advantages that: the utility model discloses dam foundation's drainage structures construction flow does: before a concrete dam body is poured on a foundation surface, a first horizontal drainage pipe is laid on the foundation surface of the dam foundation, and an outlet of the first horizontal drainage pipe is positioned on the outer side of a downstream dam site; then drilling a vertical drainage hole downwards from the base building surface of the dam foundation; then, pre-burying a vertical drain pipe and a second horizontal drain pipe, so that one end of the vertical drain pipe is connected with the vertical drain hole, the other end of the vertical drain pipe is connected with the second horizontal drain pipe, and an outlet of the second horizontal drain pipe is positioned on the outer side of a downstream dam site; and finally, pouring a concrete dam body on the foundation surface of the dam foundation, so that the vertical drain pipe, the first horizontal drain pipe and the second horizontal drain pipe are all arranged in the dam body. The surface infiltration of dam foundation is through first horizontal drain pipe discharge dam external, and the internal infiltration of dam foundation is along vertical wash port in proper order, vertical drain pipe, second horizontal drain pipe discharge dam external, and is visible, the utility model discloses a drainage structure can reduce the setting of the internal corridor of dam, reduces the requirement to the corridor, has reduced the quantity of reinforcing bar, is convenient for construct and the cost is reduced, has also reduced the destruction to dam body local stress, through pre-buried vertical drain pipe, second horizontal drain pipe, can avoid punching in the concrete dam body of pouring to reduce the harm to dam body, reinforcing bar, condenser tube and monitoring instrument etc., also more convenient construction, practice thrift the time limit for a project.
Drawings
FIG. 1 is a cross-sectional view of a gravity dam along the direction of water flow;
FIG. 2 is a cross-sectional view along a base of a dam;
FIG. 3 is a cross-sectional view along a second horizontal drain;
parts, positions and numbers in the drawings: the dam comprises a dam foundation 1, a dam body 2, a vertical water discharging hole 3, a vertical water discharging pipe 4, a first horizontal water discharging pipe 5, a second horizontal water discharging pipe 6, a downstream dam site 7, a consolidation grouting hole 8 and anchor bars 9.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the drainage structure of the dam foundation of the gravity dam comprises a vertical drainage hole 3, wherein the vertical drainage hole 3 is arranged in the dam foundation 1, one end part of the vertical drainage hole 3 is positioned on a building base surface of the dam foundation 1, the drainage structure further comprises a vertical drainage pipe 4, a first horizontal drainage pipe 5 and a second horizontal drainage pipe 6, and the vertical drainage pipe 4, the first horizontal drainage pipe 5 and the second horizontal drainage pipe 6 are all arranged in the dam body 2;
the first horizontal drain pipe 5 is located on the building base surface of the dam foundation 1, an outlet of the first horizontal drain pipe 5 is located on the outer side of a downstream dam site 7, one end of the vertical drain pipe 4 is connected with the vertical drain hole 3, the other end of the vertical drain pipe is connected with the second horizontal drain pipe 6, and an outlet of the second horizontal drain pipe 6 is located on the outer side of the downstream dam site 7. The surface seepage water of the dam foundation 1 is discharged out of the dam body 2 through the first horizontal drainage pipe 5, and the internal seepage water of the dam foundation 1 is discharged out of the dam body 2 sequentially along the vertical drainage hole 3, the vertical drainage pipe 4 and the second horizontal drainage pipe 6.
The construction method of the drainage structure of the dam foundation of the gravity dam comprises the following steps:
a. laying a first horizontal drainage pipe 5 on the foundation surface of the dam foundation 1, wherein the outlet of the first horizontal drainage pipe 5 is positioned at the outer side of a downstream dam site 7;
b. drilling a vertical drainage hole 3 downwards from the building base surface of the dam foundation 1 until the rock mass at the deep part of the dam foundation 1;
c. pre-burying a vertical drain pipe 4 and a second horizontal drain pipe 6, so that one end of the vertical drain pipe 4 is connected with the vertical drain hole 3, the other end of the vertical drain pipe is connected with the second horizontal drain pipe 6, and an outlet of the second horizontal drain pipe 6 is positioned at the outer side of a downstream dam site 7;
d. concrete dam body 2 is poured on the foundation surface of dam foundation 1, and vertical drain pipe 4, first horizontal drain pipe 5, second horizontal drain pipe 6 all set up in dam body 2.
It is thus clear that the utility model discloses a drainage structure can reduce the setting of gallery in the dam body 2, reduce the requirement to the gallery, the quantity of reinforcing bar has been reduced, be convenient for construct and the cost is reduced, also reduced the destruction to 2 local stress of dam body, through pre-buried vertical drain pipe 4, second horizontal drain pipe 6, can avoid punching in the concrete dam body 2 of pouring, thereby reduce the harm to dam body 2, the reinforcing bar, condenser tube and monitoring instrument etc., also more convenient construction, practice thrift the time limit for a project.
Specifically, before the concrete dam body 2 is poured, the dam foundation 1 needs to be drilled with the consolidation grouting holes 8, the dam foundation 1 is reinforced in the later period, and in order to reduce damage or blockage of the vertical drain holes 3 during reinforcement construction, the first horizontal drain pipes 5 and the consolidation grouting holes 8 arranged on the dam foundation 1 are staggered. For example, as shown in fig. 2, on the foundation surface of the dam foundation 1, the consolidation grouting holes 8 are arranged in a square shape, the first horizontal drainage pipes 5 are correspondingly arranged in a square shape, and only the square consolidation grouting holes 8 and the square first horizontal drainage pipes 5 are staggered. Meanwhile, in order to prevent the first horizontal drainage pipe 5 from shifting when the concrete dam body 2 is poured, the first horizontal drainage pipe 5 is fixed on the foundation surface of the dam foundation 1 through the anchor bars 9.
In order to avoid pouring the concrete dam body 2, the cement slurry blocks the vertical drain pipe 4, the first horizontal drain pipe 5 and the second horizontal drain pipe 6, protective layers are arranged on the outer surfaces of the vertical drain pipe 4, the first horizontal drain pipe 5 and the second horizontal drain pipe 6, the protective layers preferably adopt geotextile with low cost, namely the vertical drain pipe 4, the first horizontal drain pipe 5 and the second horizontal drain pipe 6 are wrapped by the geotextile, particularly, the joint part can be wrapped by the geotextile, and lead wires can be adopted for bundling.
A large number of experiments and practices prove that in order to enable internal seepage of the dam foundation 1 to be discharged out of the dam body 2 smoothly and sequentially along the vertical water discharging hole 3, the vertical water discharging pipe 4 and the second horizontal water discharging pipe 6, the height of the vertical water discharging pipe 4 is 1-3 m.
Claims (5)
1. The utility model provides a gravity dam foundation drainage structures, includes vertical wash port (3), and vertical wash port (3) set up in dam foundation (1), and the tip of vertical wash port (3) is located the building face of dam foundation (1) on, its characterized in that: the dam body (2) is characterized by further comprising a vertical drain pipe (4), a first horizontal drain pipe (5) and a second horizontal drain pipe (6), wherein the vertical drain pipe (4), the first horizontal drain pipe (5) and the second horizontal drain pipe (6) are all arranged in the dam body (2);
the first horizontal drainage pipe (5) is located on the building base surface of the dam foundation (1), an outlet of the first horizontal drainage pipe (5) is located on the outer side of a downstream dam site (7), one end of the vertical drainage pipe (4) is connected with the vertical drainage hole (3), the other end of the vertical drainage pipe is connected with the second horizontal drainage pipe (6), and an outlet of the second horizontal drainage pipe (6) is located on the outer side of the downstream dam site (7).
2. The drainage structure for the dam foundation of the gravity dam as claimed in claim 1, wherein: the first horizontal drainage pipe (5) and a consolidation grouting hole (8) arranged on the dam foundation (1) are staggered with each other.
3. The drainage structure for the dam foundation of the gravity dam as claimed in claim 1, wherein: the first horizontal drainage pipe (5) is fixed on the foundation surface of the dam foundation (1) through anchor bars (9).
4. The drainage structure for the dam foundation of the gravity dam as claimed in claim 1, wherein: the outer surfaces of the vertical water drainage pipe (4), the first horizontal water drainage pipe (5) and the second horizontal water drainage pipe (6) are provided with protective layers.
5. A drainage structure for the dam foundation of a gravity dam as claimed in any one of claims 1 to 4, wherein: the height of the vertical water drainage pipe (4) is 1-3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921220165.4U CN210459133U (en) | 2019-07-30 | 2019-07-30 | Gravity dam foundation drainage structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921220165.4U CN210459133U (en) | 2019-07-30 | 2019-07-30 | Gravity dam foundation drainage structures |
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| Publication Number | Publication Date |
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| CN210459133U true CN210459133U (en) | 2020-05-05 |
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| CN201921220165.4U Active CN210459133U (en) | 2019-07-30 | 2019-07-30 | Gravity dam foundation drainage structures |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359430A (en) * | 2019-07-30 | 2019-10-22 | 中国电建集团成都勘测设计研究院有限公司 | A kind of Gravity Dam Foundation discharge structure |
-
2019
- 2019-07-30 CN CN201921220165.4U patent/CN210459133U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359430A (en) * | 2019-07-30 | 2019-10-22 | 中国电建集团成都勘测设计研究院有限公司 | A kind of Gravity Dam Foundation discharge structure |
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