CN109914459A - A kind of ultra-deep dam foundation grout curtain structure - Google Patents
A kind of ultra-deep dam foundation grout curtain structure Download PDFInfo
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- CN109914459A CN109914459A CN201910307385.9A CN201910307385A CN109914459A CN 109914459 A CN109914459 A CN 109914459A CN 201910307385 A CN201910307385 A CN 201910307385A CN 109914459 A CN109914459 A CN 109914459A
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- 239000011440 grout Substances 0.000 title claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000008267 milk Substances 0.000 claims abstract description 11
- 210000004080 milk Anatomy 0.000 claims abstract description 11
- 235000013336 milk Nutrition 0.000 claims abstract description 11
- 238000009955 starching Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The present invention discloses a kind of ultra-deep dam foundation grout curtain structure, including the upper layer gallery, lower layer's gallery and vertical shaft being arranged perpendicular to dam foundation cross section, upper layer gallery and lower layer's gallery are parallel, and lower layer's gallery is located at the bottom of upper layer gallery, and upper layer gallery is connected with lower layer gallery by vertical shaft;It is in the milk by upper layer gallery and the first curtain body is made, it is in the milk by lower layer's gallery and the second curtain body and third curtain body is made, the updrift side in the first curtain body towards river tilts, second curtain body is parallel to the cross section in river, perpendicular to the second curtain body and towards the updrift side in river, third curtain body is connected third curtain body with the first curtain body overlap joint.The present invention implements curtain grouting in foundation of dam using upper layer and lower layer gallery, first curtain body is connected with third curtain body overlap joint, enhance the continuity for the curtain that blocks water, improve the q&r of ultra-deep dam foundation curtain, upper layer gallery is connected with lower layer gallery by vertical shaft, traffic and ventilating problem are solved, construction cost is saved.
Description
Technical field
The present invention relates to hydraulic and hydroelectric engineering technical fields, more particularly to a kind of ultra-deep dam foundation grout curtain structure.
Background technique
Curtain grouting in foundation of dam is the crack that slurries are poured into rock mass or soil layer, hole, the curtain that continuously blocks water is formed, to subtract
Small seepage discharge and the grouting works for reducing osmotic pressure.It is connect at the top of curtain with dam body, one depthkeeping of relative water resisting layer is goed deep into bottom
Degree, to prevent or reduce the infiltration of underground water in ground.
Due to the complexity of engineering geological condition, the buried depth of different engineering relative water resisting layers differs widely, according to dam foundation rock
The buried depth of body relative water resisting layer, dam curtain can be divided into that shallow-layer curtain (depth be less than 40m), (depth is greater than deep layer curtain
40m, it is less than 100m) and ultra deep curtain (depth is greater than 100m).In case history, shallow-layer curtain, deep layer curtain are more normal
See, depth also there are many successful examples no more than 150m ultra deep curtain.With southwest, the exploitation of northwest water resource, geology
The regional Dam Construction project of complicated condition is increasing, and ultra-deep curtain engineering is more and more, and the depth of ultra-deep curtain is also more next
It is deeper.Due to various aspects, curtain drilling can generate deflection, and drilling, deeper, deviation is bigger, and hole scattering can be to antiseepage curtain
The continuity of body generates totally unfavorable influence, leads to the thickness low LCL of antiseepage curtain body or cannot overlap, and forms leakage passage.It is special
It is not when curtain depth is more than 200m, the implementation of ultra-deep curtain is increasingly difficult to, and the quality of curtain is difficult to ensure.
Therefore, how to change in the prior art, leakage, showing of being difficult to ensure of quality easily occurs in ultra-deep dam foundation curtain structure
Shape is those skilled in the art's urgent problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of ultra-deep dam foundation grout curtain structure, to solve above-mentioned of the existing technology ask
Topic guarantees that the ultra-deep dam foundation blocks water the quality of curtain, improves the ultra-deep dam foundation and blocks water the reliability of curtain.
To achieve the above object, the present invention provides following schemes: the present invention provides a kind of ultra-deep dam foundation grout curtain knot
Structure, including upper layer gallery, lower layer's gallery, vertical shaft and the drainage hole being arranged perpendicular to dam foundation cross section, the upper layer gallery and institute
State that lower layer's gallery is parallel, lower layer's gallery is located at the bottom of the upper layer gallery, the axis of the upper layer gallery and described
The bottom surface of plane determined by the axis of lower layer's gallery and the dam foundation is perpendicular, and upper layer gallery and lower layer's gallery pass through institute
It states vertical shaft to be connected, lateral gallery is also set up on the dam foundation, the transverse direction gallery is connected with the upper layer gallery, the transverse direction corridor
Road extends from the upper layer gallery towards the downstream direction in river, and the drainage hole is connected with the upper layer gallery, described
The downstream direction in drainage hole towards river tilts;
It is in the milk by the upper layer gallery and the first curtain body is made, be in the milk by lower layer's gallery and the second curtain body and the is made
Three curtain bodies, the first curtain body towards river updrift side tilt, the second curtain body perpendicular to the dam foundation bottom surface,
The second curtain body is parallel to the cross section in river, and the third curtain body is perpendicular to the second curtain body and towards river
Updrift side, the third curtain body and the first curtain body overlap joint is connected, the drainage hole and the first curtain body
It is located at the two sides of the second curtain body.
Preferably, the upper layer gallery and lower layer's gallery face setting, the upper layer gallery and lower layer's gallery
Middle line be overlapped.
Preferably, the quantity of the vertical shaft be two, two vertical shafts be each perpendicular to the upper layer gallery and it is described under
Layer gallery setting, two vertical shafts are symmetrical arranged relative to the middle line of the upper layer gallery and lower layer's gallery.
Preferably, upper layer gallery 10-15m high compared with riverbed foundation plane, the upper layer gallery and lower layer's gallery it
Between distance be 80-100m, the distance between lower layer's gallery and riverbed foundation plane be 70-90m.
Preferably, the upper layer gallery has two rows of upper layer grout holes being staggered, two rows of upper layer grout holes court
It is obliquely installed to the updrift side in river, the axis of the upper layer grout hole is parallel with the first curtain body, the lower layer
Gallery has two rows of lower layer's grout holes being staggered, and the spacing between the upper layer grout hole and lower layer's grout hole is
The array pitch of 2m, two rows of upper layer grout holes and two rows of lower layer's grout holes is 1m.
Preferably, the axis of the upper layer grout hole and the axis of the upper layer gallery and the axis institute of lower layer's gallery
Angle between determining plane is 6 ° -8 °, the axis and the lower layer corridor of the axis of the drainage hole and the upper layer gallery
Angle between plane determined by the axis in road is 8 ° -10 °, the bottom surface of the bottom of the drainage hole and the upper layer gallery it
Between distance be the second curtain body bottom and 0.4-0.6 times of the distance between the upper layer gallery.
Preferably, determined by the axis of the axis and lower layer's gallery of the first curtain body and the upper layer gallery
Angle between plane is 6 °, the axis of the drainage hole and the axis of the upper layer gallery and the axis institute of lower layer's gallery
Angle between determining plane is 9 °.
Preferably, the first curtain body and the third curtain body are overlapped in decussation, the third curtain body
Bottom and the distance between the bottom of the first curtain body be 5-10m.Preferably, the thickness of the first curtain body is from institute
It states upper layer gallery and rises and gradually thickeied away from the direction of the upper layer gallery, the thickness of the second curtain body is from the lower layer
Gallery is gradually thickeied away from the direction of lower layer's gallery.
The present invention achieves following technical effect compared with the existing technology: ultra-deep dam foundation grout curtain structure of the invention,
Including upper layer gallery, lower layer's gallery, vertical shaft and the drainage hole being arranged perpendicular to dam foundation cross section, upper layer gallery and lower layer's gallery phase
In parallel, lower layer's gallery is located at the bottom of upper layer gallery, plane determined by the axis of upper layer gallery and the axis of lower layer's gallery with
The bottom surface of the dam foundation is perpendicular, and upper layer gallery is connected with lower layer gallery by vertical shaft, and lateral gallery, lateral corridor are also set up on the dam foundation
Road is connected with upper layer gallery, and lateral gallery extends from the gallery of upper layer towards the downstream direction in river, drainage hole and upper layer corridor
Road is connected, and the downstream direction in drainage hole towards river tilts;It is in the milk by upper layer gallery and the first curtain body is made, by lower layer's gallery
It is in the milk and the second curtain body and third curtain body is made, the updrift side in the first curtain body towards river tilts, and the second curtain body hangs down
Directly in the bottom surface of the dam foundation, the second curtain body is parallel to the cross section in river, and third curtain body is perpendicular to the second curtain body and direction
The updrift side in river, third curtain body are connected with the first curtain body overlap joint, and drainage hole and the first curtain body are located at second
The two sides of curtain body.Ultra-deep dam foundation grout curtain structure of the invention implements grout curtain, the first curtain using upper layer and lower layer gallery
Curtain body is connected with third curtain body overlap joint, enhances the continuity for the curtain that blocks water, and improves the q&r of ultra-deep dam foundation curtain,
Upper layer gallery is connected with lower layer gallery by vertical shaft, and traffic and ventilating problem are solved, and saves construction cost.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 faces direction schematic diagram for ultra-deep dam foundation grout curtain structure and dam body of the invention;
Fig. 2 be Fig. 1 in along A-A to cut-away illustration;
Fig. 3 is the cut-away illustration in Fig. 1 along B-B direction;
Fig. 4 be Fig. 2 in along C-C to cut-away illustration;
Wherein, 1 is upper layer gallery, and 2 be lower layer's gallery, and 3 be vertical shaft, and 4 be drainage hole, and 5 be the first curtain body, and 6 be second
Curtain body, 7 be third curtain body, and 8 be lateral gallery, and 9 be upper layer grout hole, and 10 be the dam foundation, and 11 be design grout curtain baseline,
Upper river direction is represented in attached drawing at arrow.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of ultra-deep dam foundation grout curtain structure, to solve above-mentioned of the existing technology ask
Topic guarantees that the ultra-deep dam foundation blocks water the quality of curtain, improves the ultra-deep dam foundation and blocks water the reliability of curtain.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Please refer to Fig. 1-4, wherein Fig. 1 is the positive apparent direction of ultra-deep dam foundation grout curtain structure and dam body of the invention
Schematic diagram, Fig. 2 be Fig. 1 in along A-A to cut-away illustration, Fig. 3 be Fig. 1 in along B-B direction cut-away illustration, Fig. 4 be Fig. 2 in
Along C-C to cut-away illustration.
The present invention provides a kind of ultra-deep dam foundation grout curtain structure, including the upper layer gallery being arranged perpendicular to dam foundation cross section
1, lower layer's gallery 2, vertical shaft 3 and drainage hole 4, upper layer gallery 1 and lower layer's gallery 2 are parallel, and lower layer's gallery 2 is located at upper layer gallery 1
Bottom, the bottom surface of plane and the dam foundation determined by the axis of upper layer gallery 1 and the axis of lower layer's gallery 2 is perpendicular, upper layer corridor
Road 1 is connected with lower layer gallery 2 by vertical shaft 3, lateral gallery 8 is also set up on the dam foundation, lateral gallery 8 is connected with upper layer gallery 1
Logical, lateral gallery 8 extends from upper layer gallery 1 towards the downstream direction in river, and drainage hole 4 is connected with upper layer gallery 1, drains
The downstream direction in hole 4 towards river tilts.
It is in the milk by upper layer gallery 1 and the first curtain body 5 is made, be in the milk by lower layer's gallery 2 and the second curtain body 6 and third curtain is made
The updrift side of curtain body 7, the first curtain body 5 towards river tilts, bottom surface of the second curtain body 6 perpendicular to the dam foundation, the second curtain
Body 6 is parallel to the cross section in river, and third curtain body 7 is perpendicular to the second curtain body 6 and towards the updrift side in river, third curtain
Curtain body 7 and the first curtain body 5, which overlap, to be connected, and drainage hole 4 and the first curtain body 5 are located at the two sides of the second curtain body 6.
Ultra-deep dam foundation grout curtain structure of the invention implements grout curtain, the first curtain body 5 using upper layer and lower layer gallery
It is connected with the overlap joint of third curtain body 7, enhances the continuity for the curtain that blocks water, improves the q&r of ultra-deep dam foundation curtain, on
Layer gallery 1 is connected with lower layer gallery 2 by vertical shaft 3, and traffic and ventilating problem, saving construction cost are solved.
Specifically, each parallel to the cross section in river, lateral gallery 8 is able to solve construction for upper layer gallery 1 and lower layer's gallery 2
Period traffic and ventilating problem, upper layer gallery 1 and the setting of 2 face of lower layer's gallery, the length upper layer gallery 1 of lower layer's gallery 2
Length is short, and the middle line of upper layer gallery 1 and lower layer's gallery 2 is overlapped.
Wherein, the quantity of vertical shaft 3 is two, and two vertical shafts 3 are each perpendicular to upper layer gallery 1 and lower layer's gallery 2 is arranged, two
Vertical shaft 3 is symmetrical arranged relative to the middle line of upper layer gallery 1 and lower layer's gallery 2, and two gallerys are respectively arranged at the left and right two in riverbed
Bank plays runtime traffic and logical wind action.
In this embodiment, because dam foundation curtain depth is more than 200m, i.e., upper layer gallery 1 and design grout curtain bottom
The distance between line is greater than 200m, and according to dam foundation curtain total depth, the distance between upper layer gallery 1 and lower layer gallery 2, which is arranged, is
80-100m, upper layer gallery 1 is compared with the high 10-15m of riverbed foundation plane after excavating, the distance between lower layer's gallery 2 and riverbed foundation plane
For 70-90m.
More specifically, upper layer gallery 1 has two rows of upper layer grout holes 9 being staggered, two rows of upper layer grout holes 9 are towards river
The updrift side of stream is obliquely installed, and the axis of upper layer grout hole 9 is parallel with the first curtain body 5, upper layer grout hole 9 and the first curtain
The inclined direction unanimously grout curtain convenient to carry out of curtain body 5, lower layer's gallery 2 have two rows of lower layer's grout holes being staggered, on
Layer grout hole 9 and lower layer's grout hole are staggered, and are conducive to the block-water performance that is uniform, enhancing grout curtain that is in the milk, upper layer fills
The spacing starched between hole 9 and lower layer's grout hole is 2m, and the array pitch of two rows of upper layer grout holes 9 and two rows of lower layers grout hole is
1m。
Further, determined by the axis of the axis and lower layer's gallery 2 of the axis of upper layer grout hole 9 and upper layer gallery 1
Angle between plane is 6 ° -8 °, determined by the axis of the axis of drainage hole 4 and the axis of upper layer gallery 1 and lower layer's gallery 2
Angle between plane is 8 ° -10 °, and the distance between bottom and the bottom surface of upper layer gallery 1 of drainage hole 4 are the second curtain body 6
Bottom and 0.4-0.6 times of the distance between upper layer gallery 1, i.e. the depth of drainage hole 4 0.4-0.6 that is curtain total depth
Times.
In this embodiment, the first curtain body 5 and the axis of upper layer gallery 1 and the axis institute of lower layer's gallery 2 are true
Angle between fixed plane is 6 °, and the angle between the first curtain body 5 and vertical plane is 6 °, is tilted towards updrift side, row
Angle between plane determined by the axis of the axis in water hole 4 and the axis of upper layer gallery 1 and lower layer's gallery 2 is 9 °, draining
Angle between the axis and vertical plane in hole 4 is 9 °, is tilted towards lower reaches of river direction.
Further, the first curtain body 5 is overlapped with third curtain body 7 in decussation, and enhancing curtain is integrally continuous
Property, the distance between bottom of the bottom of third curtain body 7 and the first curtain body 5 is 5-10m, i.e. the bottom of the first curtain body 5
Absolute elevation lower layer gallery 2 bottom the low 5-10m of absolute elevation, guarantee overlap joint quality, it is ensured that the curtain that blocks water it is reliable
Property.
It in order to further increase the block-water performance of curtain entirety, prevents from leaking, the thickness of the first curtain body 5 is from upper layer gallery
1 direction away from upper layer gallery 1 gradually thickeies, and the thickness of the second curtain body 6 is from lower layer's gallery 2 away from lower layer
The direction of gallery 2 gradually thickeies.
Upper layer gallery 1 and lower layer's gallery 2 is arranged, respectively to the first curtain in ultra-deep dam foundation grout curtain structure of the invention
Body 5 and the second curtain body 6 and third curtain body 7 implement grouting, and the first curtain body 5 is tilted towards upper river direction, and second
Curtain body 6 is vertical curtain, and third curtain body 7 is horizontal grout curtain, and third curtain body 7 is connected with the first curtain body 5 overlap joint, is guaranteed
The whole continuity of the curtain that blocks water, improves curtain block-water performance.Pass through 3 phase of vertical shaft between upper layer gallery 1 and lower layer's gallery 2
Connection solves the problems, such as traffic and ventilation during operation, saves construction cost.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention;At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (9)
1. a kind of ultra-deep dam foundation grout curtain structure, it is characterised in that: including be arranged perpendicular to dam foundation cross section upper layer gallery,
Lower layer's gallery, vertical shaft and drainage hole, the upper layer gallery and lower layer's gallery are parallel, and lower layer's gallery is located on described
The bottom surface phase of plane and the dam foundation determined by the axis of the bottom of layer gallery, the axis of the upper layer gallery and lower layer's gallery
Vertically, the upper layer gallery is connected with lower layer's gallery by the vertical shaft, and lateral gallery, the cross are also set up on the dam foundation
It is connected to gallery with the upper layer gallery, downstream direction of the transverse direction gallery from the upper layer gallery towards river prolongs
It stretches, the drainage hole is connected with the upper layer gallery, and the downstream direction in the drainage hole towards river tilts;
It is in the milk by the upper layer gallery and the first curtain body is made, be in the milk by lower layer's gallery and the second curtain body and third curtain is made
Curtain body, the first curtain body towards river updrift side tilt, the second curtain body perpendicular to the dam foundation bottom surface, it is described
Second curtain body is parallel to the cross section in river, and the third curtain body is perpendicular to the second curtain body and towards the upper of river
Roam all around the would is to the third curtain body is connected with the first curtain body overlap joint, the drainage hole and the first curtain body difference
Positioned at the two sides of the second curtain body.
2. ultra-deep dam foundation grout curtain structure according to claim 1, it is characterised in that: the upper layer gallery and it is described under
The middle line of layer gallery face setting, the upper layer gallery and lower layer's gallery is overlapped.
3. ultra-deep dam foundation grout curtain structure according to claim 2, it is characterised in that: the quantity of the vertical shaft is two
Item, two vertical shafts are each perpendicular to the upper layer gallery and lower layer's gallery setting, and two vertical shafts are relative to described
The middle line of upper layer gallery and lower layer's gallery is symmetrical arranged.
4. ultra-deep dam foundation grout curtain structure according to claim 1, it is characterised in that: the upper layer gallery is built compared with riverbed
The high 10-15m of basal plane, the distance between the upper layer gallery and lower layer's gallery are 80-100m, lower layer's gallery and riverbed
The distance between foundation plane is 70-90m.
5. ultra-deep dam foundation grout curtain structure according to claim 1, it is characterised in that: the upper layer gallery has two rows
The updrift side of the upper layer grout hole being staggered, two rows of upper layer grout hole towards the rivers is obliquely installed, and the upper layer fills
The axis for starching hole is parallel with the first curtain body, and lower layer's gallery has two rows of lower layer's grout holes being staggered, institute
The spacing stated between upper layer grout hole and lower layer's grout hole is 2m, two rows of upper layer grout holes and two rows of lower layers
The array pitch of grout hole is 1m.
6. ultra-deep dam foundation grout curtain structure according to claim 5, it is characterised in that: the axis of the upper layer grout hole
Angle between plane determined by the axis of the upper layer gallery and the axis of lower layer's gallery is 6 ° -8 °, the row
Angle between plane determined by the axis of the axis and lower layer's gallery of the axis in water hole and the upper layer gallery is 8 °-
10 °, the bottom and institute of the distance between the bottom of the drainage hole and the bottom surface of the upper layer gallery for the second curtain body
0.4-0.6 times for stating the distance between upper layer gallery.
7. ultra-deep dam foundation grout curtain structure according to claim 5, it is characterised in that: the first curtain body with it is described
Angle between plane determined by the axis of the axis of upper layer gallery and lower layer's gallery is 6 °, the axis of the drainage hole
Angle between plane determined by the axis of the upper layer gallery and the axis of lower layer's gallery is 9 °.
8. ultra-deep dam foundation grout curtain structure according to claim 1, it is characterised in that: the first curtain body with it is described
Third curtain body in decussation overlap, between the bottom of the third curtain body and the bottom of the first curtain body away from
From for 5-10m.
9. ultra-deep dam foundation grout curtain structure according to claim 1, it is characterised in that: the thickness of the first curtain body
It is gradually thickeied from the upper layer gallery away from the direction of the upper layer gallery, the thickness of the second curtain body is described in
Lower layer's gallery is gradually thickeied away from the direction of lower layer's gallery.
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