CN106498970A - Arch dam drag body foundation reinforcing structure - Google Patents
Arch dam drag body foundation reinforcing structure Download PDFInfo
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- CN106498970A CN106498970A CN201611062395.3A CN201611062395A CN106498970A CN 106498970 A CN106498970 A CN 106498970A CN 201611062395 A CN201611062395 A CN 201611062395A CN 106498970 A CN106498970 A CN 106498970A
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- arch
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/40—Foundations for dams across valleys or for dam constructions
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/08—Wall dams
- E02B7/12—Arch dams
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses be related to arch dam, a kind of especially arch dam drag body foundation reinforcing structure.Arch arch dam drag body foundation reinforcing structure, arch abutment base area, soft rock zone region, low velocity of wave rock zone region, III grade of rock mass region are followed successively by along arch dam arch thrust direction, concrete cushion block is provided with the arch abutment base area, the soft rock zone region and low velocity of wave rock zone region are through concrete consolidation grouting consolidation process, and are provided with grid hole plug xoncrete structure in soft rock zone region；Arch dam arch thrust direction is provided with power transmission hole, power transmission hole one end is connected with concrete cushion block, the other end is extended in III grade of rock mass region through soft rock zone region, low velocity of wave rock zone zone level, and the drag body foundation reinforcing structure is additionally provided with drainage system.The present invention provides a kind of good rigidity, non-deformability strong arch dam drag body foundation reinforcing structure.
Description
Technical field
The present invention relates to arch dam, especially a kind of arch dam drag body foundation reinforcing structure；Moreover, it relates to a kind of
The reinforcement means of arch dam, especially a kind of reinforcement means of arch dam drag body foundation structure.
Background technology
Arch dam is often built in complex geological condition, due to exist in complex geological condition deep-seated fault, soft rock zone,
The unfavorable geology such as low velocity of wave rock mass and crack, these geology be affect arch dam foundation globality, stability, infiltrative main because
Element, so, it is emphasis and the difficult point of arch dam drag body ground to the process of these unfavorable geologies, and arch dam drag body ground base junction
Structure meets necessary rigidity, the primary condition of the composite request of non-deformability.At present, to the process of arch dam drag body foundation structure
There are many methods, but effect is bad, especially for the complicated geological bar that there is larger soft rock zone, low velocity of wave rock mass
Part, causes its rigidity, non-deformability to be unsatisfactory for requiring, affects the life-span of arch dam.
Content of the invention
The technical problem to be solved is to provide the strong arch dam drag body ground of a kind of good rigidity, non-deformability
Ruggedized construction.
The present invention solves the arch dam drag body foundation reinforcing structure that adopted of its technical problem, along arch dam arch thrust direction according to
Secondary for arch abutment base area, soft rock zone region, low velocity of wave rock zone region, III grade of rock mass region, in the arch abutment base area
Be provided with concrete cushion block, the soft rock zone region and low velocity of wave rock zone region through concrete consolidation grouting consolidation process,
And in soft rock zone region, it is provided with grid hole plug xoncrete structure；Arch dam arch thrust direction is provided with power transmission hole, the biography
Power hole one end is connected with concrete cushion block, and the other end extends to III grade through soft rock zone region, low velocity of wave rock zone zone level
In rock mass region, the drag body foundation reinforcing structure is additionally provided with drainage system.
It is further that the concrete cushion block includes base, the base is be sequentially reduced from top to bottom stepped.
It is further that arch dam arch thrust direction is provided with three layers of power transmission hole, the quantity at least one in every layer of power transmission hole.
It is further that the transverse section in the power transmission hole is gateway opening shape.
It is further that the grid hole plug xoncrete structure includes 3 layer concrete adits and 4 concrete inclined shafts, mixes
Solidifying soil adit is arranged with the interconnection of concrete inclined shaft.
It is further that the drainage system is made up of longitudinal drainage hole and transverse drainage hole.
Another problem to be solved of the invention is to provide the strong arch dam drag body ground of a kind of good rigidity, non-deformability
The reinforcement means of based structures.
The reinforcement means of the arch dam drag body foundation structure that the present invention is provided, comprises the steps：
A, to excavating directly as the fragmented rock body of foundation plane in arch abutment base area, and change and fill out as concrete
Base；
B, power transmission hole is set along arch dam arch thrust direction, power transmission hole one end is connected with concrete cushion block, and the other end is worn
Cross soft rock zone region, low velocity of wave rock zone zone level to extend in III grade of rock mass region；
C, the fragmented rock body in soft rock zone region is excavated, and change to fill out and xoncrete structure is filled in for grid hole；
D, concrete consolidation grouting consolidation process is carried out to soft rock zone region, low velocity of wave rock zone region；
E, in arch dam drag body foundation reinforcing structure arrange drainage system.
It is further to adopt combined bolting and shotcrete during the wide open digging of power transmission, and carry out reinforced concrete lining layer, to lining concrete
120 ° of scopes of crown carry out rockfill grouting, and the lining cutting of power transmission hole is completed；Simultaneously soft rock zone region, low velocity of wave rock zone region are carried out
High Pressure Consolidation Grouting process.
The invention has the beneficial effects as follows：The arch dam drag body foundation reinforcing structure and its reinforcement means of the present invention is particularly suitable
In the complex geological condition that there is fairly large soft rock zone region, low velocity of wave rock zone region.
By arch abutment base area can not be excavated directly as the fragmented rock body of foundation plane, and change to fill out and be set to mix
Solidifying soil base, carries out consolidation process to arch abutment base area, improves its rigidity and non-deformability, and concrete cushion block is constituted
Ground floor force transmission mechanism and load carrier；Arch dam arch thrust direction is being provided with power transmission hole, power transmission hole can be by arch dam arch thrust
Reach in the relatively good III grade of rock mass area of rigidity, reduce arch dam arch thrust to soft rock zone region, low velocity of wave rock zone area
Area deformation is destroyed, and power transmission hole constitutes second layer force transmission mechanism and load carrier；To soft rock zone region and low velocity of wave rock zone area
Domain is through High Pressure Consolidation Grouting consolidation process, and is provided with concrete replacement grid hole plug concrete knot in soft rock zone region
Structure, improves the rigidity and non-deformability in soft rock zone region and low velocity of wave rock zone region；Soft rock zone region and low velocity of wave
Rock zone region constitutes third layer force transmission mechanism and load carrier；Drainage system is additionally provided with drag body foundation structure, is passed through
Draining reduces drag body ground osmotic pressure, improves its non-deformability.So, the arch dam drag body foundation reinforcing structure of the present invention is
At many levels, multiple location solid carrying system, the system based on arch dam building base plane reinforcing and deep-layer reinforcing, mutually tie by underground ground
Close, shallow-layer deep layer combines, concrete and grouting body phase are combined, and are disperseed power transmission step by step, are improved the rigidity of arch dam drag body ground
And non-deformability, it is to avoid arch dam drag body ground bears arch dam arch thrust tailing edge soft rock zone region or structural plane generation is bad
Slide and deform, improve the life-span of arch dam.
Description of the drawings
Fig. 1 is the planar structure schematic diagram of the present invention；
Parts, position and numbering in figure：Arch dam 1, arch abutment base area 2, soft rock zone region 3, low velocity of wave rock zone area
4, III grade of domain rock mass region 5, concrete cushion block 6, power transmission hole 7, drainage system 8.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1,1 drag body foundation reinforcing structure of arch dam of the present invention, is particularly well-suited to the presence of fairly large weak rocks
3 domain of zone, the complex geological condition in low velocity of wave rock zone region 4, concrete structure is：Arch abutment is followed successively by along 1 arch thrust direction of arch dam
Base area 2, soft rock zone region 3,4, III grade of low velocity of wave rock zone region rock mass region 5, III grade of rock mass region 5 are that rigidity is relative
Preferable region, the rock mass in the region need not or simple consolidation process can meet the use of 1 drag body ground of arch dam will
Ask, in the arch abutment base area 2, be provided with concrete cushion block 6, the soft rock zone region 3 and low velocity of wave rock zone region 4 pass through
Concrete consolidation grouting consolidation process is crossed, and in soft rock zone region 3, is provided with displacement grid hole plug xoncrete structure；Along arch dam
1 arch thrust direction is provided with power transmission hole 7, and described 7 one end of power transmission hole is connected with concrete cushion block 6, and the other end passes through soft rock zone
Region 3, low velocity of wave rock zone region 4 are extended horizontally in III grade of rock mass region 5, and the drag body foundation reinforcing structure is additionally provided with
Drainage system 8.
The fragmented rock body that 2 certain limit of arch abutment base area can not directly make foundation plane is excavated, and changes that to fill out be mixed
Solidifying soil base 6, used as a kind of force transmission mechanism and load carrier, its plane and elevation scope are according to 1 bodily form of arch dam for concrete cushion block 6
Design and 2 rock mass condition of arch abutment base area are determined through finite element analyses.By being provided with concrete in arch abutment base area 2
Base 6 so that basic stress is effectively spread, improves 1 drag body ground integral rigidity of arch dam, to reducing 1 arch thrust of arch dam
Obvious with deformation effect.In order to avoid causing the change mould mutation between 2 basic rock mass of concrete cushion block 6 and arch abutment base area,
By 6 base of concrete cushion block be set to be sequentially reduced from top to bottom stepped, so arrange can be formed by concrete cushion block 6 to
The displacement transition region of 2 basic rock mass of arch abutment base area, is also beneficial to the using effect for improving concrete cushion block 6.
Power transmission hole 7 is also xoncrete structure, and its Main Function is that 1 arch thrust of arch dam is reached rigidity is relatively good III grade
In rock mass region 5, reduce 1 arch thrust of arch dam to soft rock zone region 3, low 4 deformation failure of velocity of wave rock zone region.Preferred a kind of
Embodiment is：1 arch thrust direction of arch dam is provided with three layers of power transmission hole 7, the quantity in every layer of power transmission hole 7 is at least one, than
1 power transmission hole 7 is set in 1829m elevations such as, 1785m, 1730m elevation respectively arranges 2 power transmission holes 7, and every layer of power transmission hole 7 is each
Extend horizontally in III grade of rock mass region 5 through soft rock zone region 3, low velocity of wave rock zone region 4 from plane, power transmission hole 7 is horizontal
Section adopts gateway opening shape, and size is 9.00m (width) × 12.00m (height).The Specific construction process in power transmission hole 7 is：Power transmission hole 7
System combined bolting and shotcrete being adopted during excavation, and carrying out reinforced concrete lining layer in time, 120 ° of scopes of lining concrete crown are carried out
Rockfill grouting, 7 lining cutting of power transmission hole are completed.
Soft rock zone region 3 includes fragmented rock body part and affects band rock mass part, and fragmented rock body part is to 1 drag of arch dam
Body ground dam abutment antiskid, resistance to deformation or seepage stability affect larger, so fragmented rock body part is excavated by the present invention, and change fill out for
Fill in xoncrete structure in grid hole.The displacement grid hole that the present invention is adopted fill in the optimal way of xoncrete structure for：Displacement grid hole
Plug xoncrete structure includes that 3 layer concrete adits and 4 concrete inclined shafts, concrete adit are set with concrete inclined shaft interconnection
Put.3 layer concrete adits are separately positioned in different elevations, replace the transverse section of adit using gateway opening shape, and size is
7.50m (width) × 10.00m (height), displacement inclined shaft are arranged along 3 structural plane of soft rock zone region tendency, concrete inclined shaft transverse section
Using rectangle, size is 7.00m (width) × 15.00m (height).
The impact band rock mass part in soft rock zone region 3 and low velocity of wave rock zone region 4 are at High Pressure Consolidation Grouting reinforcing
Reason, can effectively eliminate the low value of wave speed of rock mass of 1 drag body ground of arch dam, strengthen 1 drag body foundation stiffness of arch dam, improve arch dam
1 drag body ground non-deformability, and it is good to be so provided with using effect, low cost.
Drainage system 8 is additionally provided with 1 drag body foundation structure of the arch dam, drainage system 8 is by longitudinal drainage hole and horizontal stroke
Constitute to scupper, drag body ground osmotic pressure is reduced by draining, its non-deformability is improved.
In sum, by arch abutment base area 2 can not be excavated directly as the fragmented rock body of foundation plane, and change
Setting concrete cushion block 6 is filled out, consolidation process is carried out to arch abutment base area 2, its rigidity and non-deformability, coagulation is improve
Native base 6 constitutes ground floor force transmission mechanism and load carrier；1 arch thrust direction of arch dam is being provided with power transmission hole 7, power transmission hole 7
1 arch thrust of arch dam can be reached in the relatively good III grade of rock mass region 5 of rigidity, reduce 1 arch thrust of arch dam to weak rocks zone
Domain 3, low 4 deformation failure of velocity of wave rock zone region, power transmission hole 7 constitutes second layer force transmission mechanism and load carrier；To soft rock zone
Region 3 and low velocity of wave rock zone region 4 are through High Pressure Consolidation Grouting consolidation process, and are provided with replacement web in soft rock zone region 3
Xoncrete structure is filled in lattice hole, improves the rigidity and non-deformability in soft rock zone region 3 and low velocity of wave rock zone region 4；Weak
Rock zone region 3 and low velocity of wave rock zone region 4 constitute third layer force transmission mechanism and load carrier；Also set in drag body foundation structure
Drainage system 8 is equipped with, drag body ground osmotic pressure is reduced by draining, its non-deformability is improved.So, the arch dam 1 of the present invention
Drag body foundation reinforcing structure is multi-level, multiple location solid carrying system, and the system is reinforced with 1 foundation plane of arch dam and deep layer adds
Gu based on, underground ground combines, and shallow-layer deep layer combines, and concrete and grouting body phase are combined, and power transmission step by step improves arch dam 1
The rigidity and non-deformability of drag body ground, it is to avoid 1 drag body ground of arch dam bears 1 arch thrust tailing edge weak rocks zone of arch dam
Domain 3 or structural plane produce bad slip and deformation, improve the life-span of arch dam 1.
For the reinforcement means of 1 drag body foundation structure of arch dam, its reinforcing step is：
A, to excavating directly as the fragmented rock body of foundation plane in arch abutment base area 2, and change and fill out as coagulation
Native base 6；
B, power transmission hole 7 is set along 1 arch thrust direction of arch dam, described 7 one end of power transmission hole is connected with concrete cushion block 6, another
End is extended horizontally in III grade of rock mass region 5 through soft rock zone region 3, low velocity of wave rock zone region 4；
C, the fragmented rock body in soft rock zone region 3 is excavated, and change to fill out and xoncrete structure is filled in for grid hole；
D, High Pressure Consolidation Grouting process is carried out to soft rock zone region 3, low velocity of wave rock zone region 4；
E, in 1 drag body foundation structure of the arch dam arrange drainage system 8.
System combined bolting and shotcrete is adopted when power transmission hole 7 is excavated, and carries out reinforced concrete lining layer, to lining concrete crown
120 ° of scopes carry out rockfill grouting, and 7 lining cutting of power transmission hole is completed；In order to improve consolidation effect, while to soft rock zone region 3, low
Velocity of wave rock zone region 4 carries out High Pressure Consolidation Grouting construction.
Claims (8)
1. arch dam drag body foundation reinforcing structure, is followed successively by arch abutment base area (2), weak rocks along arch dam (1) arch thrust direction
Region (3), low velocity of wave rock zone region (4), III grade of rock mass region (5), it is characterised in that：In arch abutment base area (2)
Concrete cushion block (6) is provided with, soft rock zone region (3) and low velocity of wave rock zone region (4) are through concrete consolidation grouting
Grid hole plug xoncrete structure is provided with consolidation process, and soft rock zone region (3)；Arrange along arch dam (1) arch thrust direction
There are power transmission hole (7), power transmission hole (7) one end to be connected with concrete cushion block (6), the other end is through soft rock zone region (3), low
Velocity of wave rock zone region (4) is extended horizontally in III grade of rock mass region (5), and the drag body foundation reinforcing structure is additionally provided with draining
System (8).
2. arch dam drag body foundation reinforcing structure as claimed in claim 1, it is characterised in that：Concrete cushion block (6) include
Base, the base are be sequentially reduced from top to bottom stepped.
3. arch dam drag body foundation reinforcing structure as claimed in claim 1, it is characterised in that：Set along arch dam (1) arch thrust direction
It is equipped with three layers of transmission hole (7), the quantity at least one of per layer of transmission hole (7).
4. arch dam drag body foundation reinforcing structure as claimed in claim 3, it is characterised in that：The transverse section of power transmission hole (7)
For gateway opening shape.
5. arch dam drag body foundation reinforcing structure as claimed in claim 1, it is characterised in that：Fill in xoncrete structure in the grid hole
Including 3 layer concrete adits and 4 concrete inclined shafts, concrete adit is arranged with the interconnection of concrete inclined shaft.
6. arch dam drag body foundation reinforcing structure as described in claim 1 to 5 any one, it is characterised in that：The draining system
System (8) is made up of longitudinal drainage hole and transverse drainage hole.
7. the reinforcement means of arch dam drag body ground, it is characterised in that：Comprise the steps：
A, to excavating directly as the fragmented rock body of foundation plane in arch abutment base area (2), and change and fill out as concrete
Base (6)；
B, power transmission hole (7) is set along arch dam (1) arch thrust direction, power transmission hole (7) one end is connected with concrete cushion block (6),
The other end is extended horizontally in III grade of rock mass region (5) through soft rock zone region (3), low velocity of wave rock zone region (4)；
C, the fragmented rock body in soft rock zone region (3) is excavated, and change to fill out and xoncrete structure is filled in for grid hole；
D, concrete consolidation grouting consolidation process is carried out to soft rock zone region (3), low velocity of wave rock zone region (4)；
E, setting drainage system (8) in arch dam drag body foundation reinforcing structure.
8. the reinforcement means of arch dam drag body ground as claimed in claim 7, it is characterised in that：Adopt when excavating in power transmission hole (7)
With combined bolting and shotcrete, and reinforced concrete lining layer is carried out, rockfill grouting, power transmission hole are carried out to 120 ° of scopes of lining concrete crown
(7) lining cutting is completed；Concrete consolidation grouting construction is carried out to soft rock zone region (3), low velocity of wave rock zone region (4) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611062395.3A CN106498970A (en) | 2016-11-25 | 2016-11-25 | Arch dam drag body foundation reinforcing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611062395.3A CN106498970A (en) | 2016-11-25 | 2016-11-25 | Arch dam drag body foundation reinforcing structure |
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| Publication Number | Publication Date |
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| CN106498970A true CN106498970A (en) | 2017-03-15 |
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| CN201611062395.3A Pending CN106498970A (en) | 2016-11-25 | 2016-11-25 | Arch dam drag body foundation reinforcing structure |
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| CN (1) | CN106498970A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114117610A (en) * | 2021-11-30 | 2022-03-01 | 中国电建集团成都勘测设计研究院有限公司 | Method for processing and designing asymmetric geology of arch dam foundation |
| CN117552430A (en) * | 2024-01-11 | 2024-02-13 | 中国电建集团西北勘测设计研究院有限公司 | Non-radial excavation method for dam abutment of arch dam |
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| CN114117610A (en) * | 2021-11-30 | 2022-03-01 | 中国电建集团成都勘测设计研究院有限公司 | Method for processing and designing asymmetric geology of arch dam foundation |
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| CN117552430A (en) * | 2024-01-11 | 2024-02-13 | 中国电建集团西北勘测设计研究院有限公司 | Non-radial excavation method for dam abutment of arch dam |
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