CN106400751A - Sand blocking ridge structure and construction process thereof - Google Patents
Sand blocking ridge structure and construction process thereof Download PDFInfo
- Publication number
- CN106400751A CN106400751A CN201610814121.9A CN201610814121A CN106400751A CN 106400751 A CN106400751 A CN 106400751A CN 201610814121 A CN201610814121 A CN 201610814121A CN 106400751 A CN106400751 A CN 106400751A
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- Prior art keywords
- cofferdam
- sediment trapping
- bank
- trapping bank
- wall
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Revetment (AREA)
Abstract
The invention discloses a sand blocking ridge structure and a construction process thereof, and belongs to the field of hydraulic and hydroelectric engineering. According to the sand blocking ridge structure and the construction process thereof, a cofferdam and a sand blocking ridge are combined, the sand blocking ridge is an earth and rockfill dam formed by accumulating earth and rockfill materials, and the upstream lateral surface, the top surface and the downstream lateral surface of the sand blocking ridge are each provided with a layer of concrete revetment. After the cofferdam is used, the cofferdam is partially detached, and the left partial cofferdam directly serves as the sand blocking ridge. By arranging the corresponding concrete revetment structures, the sand blocking ridge is prevented from being scoured, and meanwhile the stability of the sand blocking ridge is guaranteed. The technical problems caused when the cofferdam directly serves as the sand blocking ridge are solved. The size of the foundation pit cofferdam is reduced, construction workloads are reduced, and the construction period is shortened.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering field, more particularly, to a kind of sediment trapping bank structure and its construction technology.
Background technology
In Hydraulic and Hydro-Power Engineering, the water diversion and sand control in river course is an emphasis needing during design to consider.In order to avoid river
Stream silt enters factory building unit, reduces silt and the abrasion of unit is damaged, often set in factory building water inlet and diversion tunnel water inlet
Put sediment trapping bank structure, to play the stop to river sand, and ensure that clear water enters factory building unit.At present, the pattern of sediment trapping bank is general
In conjunction with actual conditions setting, common are concrete gravity type, concrete props up gear formula, grinding coagulation soil arcuately, rock-fill dams pattern
Deng.But, sediment trapping bank structure of the prior art, construction when, be generally arranged inside foundation ditch cofferdam, and with foundation ditch cofferdam
Separately positioned；And form because existing foundation ditch cofferdam generally uses to be piled up by earth and stone material, therefore nor directly make
Use for sediment trapping bank structure.In addition, in prior art, in order to ensure the homeostasis of sediment trapping bank structure, generally also need to blocking
Husky bank structure and its foundation carry out proper treatment.In prior art the shortcoming of sediment trapping bank structure mainly by following some：
1st, increased the scope in foundation ditch cofferdam, due to usual dash to be included in foundation ditch cofferdam, sluicing, diversion and power etc.
Building, simultaneously because sediment trapping bank structure is also disposed in foundation ditch cofferdam, therefore leads to foundation ditch cofferdam scope larger, and then to base
Drawing water in the cofferdam of hole, drainage system amount are big, and cofferdam itself quantities also will increase simultaneously.
2nd, will be separately positioned to cofferdam and sediment trapping bank structure, quantities is larger.And due to being separately provided sediment trapping bank in addition it is also necessary to
Check the operating modes such as its stable, stress, to guarantee that basis is not washed；If basic cover layer is deeper, the quantities of sediment trapping bank will
Bigger.
3rd, carry out the construction of sediment trapping bank in foundation ditch cofferdam, the construction with major projects such as dash, sluicing, diversion and powers has
Interference, increased difficulty of construction, increased the construction period.
Content of the invention
Present invention solves the technical problem that being to provide a kind of sediment trapping bank structure solving above-mentioned technical problem, propose one simultaneously
Plant the sediment trapping bank structure construction technique that cofferdam and sediment trapping bank combine, can directly be tied as sediment trapping bank by the use of the part in cofferdam
Structure.
The technical solution adopted for the present invention to solve the technical problems is：A kind of sediment trapping bank structure, including build in river course
Interior dam body, described dam body is divided into flood discharge section and factory building section, also includes leading wall and sediment trapping bank, described lead wall be arranged on flood discharge section and
Between factory building section, and lead one end of wall and be connected with dam body, lead wall the other end upstream extend after with one end of sediment trapping bank even
Connect；Described sediment trapping bank is arranged on the corresponding upstream of factory building section, and one end of sediment trapping bank is connected with the bank of river course side, sediment trapping
The other end of bank is connected with leading wall；Described sediment trapping bank is the earth and rockfill dam piled up by earth and stone material, and the upstream in sediment trapping bank
One layer concrete bank protection is provided with side, top surface and downstream side.
It is further：Described sediment trapping bank with respect to river course flow direction be obliquely installed, and on sediment trapping bank with lead what wall was connected
One end is located at the downstream of the one end be connected on sediment trapping bank with river course side bank.
It is further：It is provided with inlet channel between the dam body of sediment trapping bank and factory building section, in the upper surface of inlet channel
It is provided with a layer concrete bank protection.
It is further：The described elevation leading wall is consistent with the elevation of sediment trapping bank.
In addition, the present invention also provides a kind of sediment trapping bank structure construction technique, described sediment trapping bank structure is the invention described above institute
The sediment trapping bank structure stated, comprises the steps：
A, in river course build cofferdam so that river course to be intercepted, the two ends in cofferdam are connected with the both sides bank in river course respectively；
B, carry out leading the construction of the building between wall, dam body and dam body and cofferdam in cofferdam downstream；The described wall of leading
One end is connected with cofferdam, and the other end leading wall is connected with dam body；It is flood discharge section positioned at the dam body leading wall side, another positioned at leading wall
The dam body of side is factory building section；And being located at and leading wall side and one section cofferdam corresponding with flood discharge section is first paragraph cofferdam, and is located at
Lead wall opposite side and one section cofferdam corresponding with factory building section is second segment cofferdam；
After the completion of architecture construction between C, wall to be led, dam body and dam body and cofferdam, remove first paragraph cofferdam completely；
D, after removing first paragraph cofferdam completely, simultaneously when the upstream side in second segment cofferdam corresponding actual water level elevation
After H decreases below the design elevation of top surface h1 of sediment trapping bank to be built, removing on second segment cofferdam is higher than above-mentioned sediment trapping to be built
The unnecessary cofferdam of the design elevation of top surface h1 of bank, and the part that second segment cofferdam is left behind is sediment trapping bank；
One layer concrete bank protection is arranged on E, the upstream side in sediment trapping bank, top surface and downstream side.
It is further：In stepb, the construction carrying out the building between dam body and cofferdam includes inlet channel is applied
Work；Afterwards in step E, it is also equipped with a layer concrete bank protection in the upper surface of inlet channel.
It is further：When carrying out step D, the floodgate that can open in flood discharge section carries out flood discharge, to drop further
The upstream side corresponding actual water level elevation H in low second segment cofferdam.
It is further：Carry out step D within the dry season in river course.
The invention has the beneficial effects as follows：Sediment trapping bank in the present invention is the earth and rockfill dam piled up by earth and stone material, therefore may be used
In cofferdam using rear by removing part cofferdam, by remaining part cofferdam directly as sediment trapping bank, and corresponding by setting
Concrete revetment structure, you can avoid sediment trapping bank to be washed, guarantee the stability of sediment trapping bank simultaneously；Thus overcome and will enclose
The technical barrier that weir is brought directly as sediment trapping bank.In addition, the construction technology to above-mentioned sediment trapping bank structure that the present invention provides,
Achieve and directly build up sediment trapping bank using part cofferdam, therefore reduce the size in foundation ditch cofferdam, decrease engineering construction amount, contracting
The short construction period；Simultaneously and the construction to sediment trapping bank also will not affect greatly to the construction of other main buildings；Separately
Outward, sediment trapping bank directly utilizes the foundation structure in cofferdam, also ensures that stablizing of sediment trapping camphyl plinth.
Brief description
Fig. 1 is the schematic diagram of sediment trapping bank structure of the present invention；
Fig. 2 is the schematic diagram of Section A-A in Fig. 1；
Fig. 3, Fig. 4, Fig. 6 are the schematic diagram of each construction stage in construction technology of the present invention；
Fig. 5 is the schematic diagram at B-B interface in Fig. 4；
Fig. 7, Fig. 8 are the schematic diagram of C-C structure in Fig. 6；And it is divided into the corresponding two kinds different modes removing cofferdam.
In figure is labeled as：River course 1, dam body 2, flood discharge section 21, factory building section 22, lead wall 3, sediment trapping bank 4, concrete revetment 5, enter
Water channel 6, cofferdam 7, first paragraph cofferdam 71, second segment cofferdam 72, unnecessary cofferdam 721, basis 8, the actual water level carrying out during step D
Elevation H；Water level elevation h2 when the design elevation of top surface h1 of sediment trapping bank, dam run.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, a kind of sediment trapping bank structure of the present invention, including building the dam body 2 in river course 1, described
Dam body is divided into flood discharge section 21 and factory building section 22, also includes leading wall 3 and sediment trapping bank 4, and described wall 3 of leading is arranged on flood discharge section 21 and factory building
Between section 22, and lead one end of wall 3 and be connected with dam body, lead wall 3 the other end upstream extend after one end company with sediment trapping bank 4
Connect；Described sediment trapping bank 4 is arranged on the corresponding upstream of factory building section 22, and one end of sediment trapping bank 4 is connected with the bank of river course 1 side
Connect, the other end of sediment trapping bank 4 is connected with leading wall 3；Described sediment trapping bank 4 is the earth and rockfill dam piled up by earth and stone material, and is blocking
One layer concrete bank protection 5 is provided with the upstream side of husky bank 4, top surface and downstream side.
Wherein, the effect of concrete revetment 5 is for being wrapped in the periphery of sediment trapping bank 4 to play a protective role, because of dam
Normal when running after building up, whole sediment trapping bank 4 by positioned at run when below water level elevation h2, therefore pile up for by earth and stone material
Sediment trapping bank 4 for, by arrange concrete revetment 5, can effectively avoid earth and stone material by erosion, and then guarantee entirely to block
The stablizing of husky bank 4.And the earth and rockfill dam that can directly be piled up using earth and stone material due to the sediment trapping bank 4 in the present invention, therefore can be straight
Connect and built using part cofferdam, be so achieved that the recycling to cofferdam, also can reduce the construction of sediment trapping bank 4 simultaneously
Amount, and also can reduce the size in whole foundation ditch cofferdam, reduce whole project, reduction of erection time, reduces cost etc..
More specifically, also described sediment trapping bank 4 can be obliquely installed with respect to river course flow direction, as shown in fig. 1；And sediment trapping
With the downstream leading one end that wall 3 is connected and being located at the one end be connected on sediment trapping bank 4 with river course 1 side bank on bank 4.So, pile up
Can be more conducive to flow towards flood discharge section 21 direction in the river sand of sediment trapping Kan4Chu, decrease river sand bulk deposition to sediment trapping Kan4Chu's
Situation.
In addition, be generally also provided with inlet channel 6 between the dam body of sediment trapping bank 4 and factory building section 22 being beneficial to into water, at this
In the case of kind, the present invention also can be provided with a layer concrete bank protection 5 in the upper surface of inlet channel 6；And this concrete revetment 5
Can be consistent with the concrete revetment 5 of setting on sediment trapping bank 4.
In addition, the effect leading wall 3 is for splitting flood discharge section 21 and factory building section 22, with avoid river sand by lead wall 3 right
The position answered enters in factory building section；Certainly, generally the elevation leading wall 3 is set to consistent with the elevation of sediment trapping bank 4
Situation.
In addition, the present invention also provides a kind of Specific construction technique to the sediment trapping bank structure described in the invention described above, specifically
Can refer to accompanying drawing 3 to the schematic diagram of each construction stage shown in accompanying drawing 8；Described construction technology comprises the steps：
A, in river course build cofferdam 7 so that river course to be intercepted, the two ends in cofferdam 7 are connected with the both sides bank in river course 1 respectively；
Now situation shown in respective figure 3；
B, carry out leading the construction of the building between wall 3, dam body 2 and dam body 2 and cofferdam 7 in cofferdam 7 downstream；Described lead
One end of wall 3 is connected with cofferdam, and the other end leading wall 3 is connected with dam body；It is flood discharge section 21 positioned at the dam body 2 leading wall 3 side, position
It is factory building section 22 in the dam body leading wall opposite side；And being located at and leading wall 3 side and one section cofferdam corresponding with flood discharge section 21 is the
One section of cofferdam 71, and it is located at that to lead wall 3 opposite side and one section cofferdam corresponding with factory building section 22 be second segment cofferdam 72；Now correspond to
Situation shown in accompanying drawing 4 and accompanying drawing 5；
After the completion of architecture construction between C, wall to be led 3, dam body 2 and dam body 2 and cofferdam 7, remove first paragraph completely
Cofferdam 71；
D, after removing first paragraph cofferdam 71 completely, simultaneously when the corresponding actual water level of the upstream side in second segment cofferdam 72
After elevation H decreases below the design elevation of top surface h1 of sediment trapping bank 4 to be built, remove on second segment cofferdam 72 higher than above-mentioned to be repaired
Build the unnecessary cofferdam 721 of the design elevation of top surface h1 of sediment trapping bank 4, and the part that second segment cofferdam 72 is left behind is sediment trapping bank
4；
One layer concrete bank protection 5 is arranged on E, the upstream side in sediment trapping bank 4, top surface and downstream side.Now correspond to attached
Situation shown in Fig. 6, Fig. 7 and Fig. 8；
Wherein, cofferdam 7 is for intercepting river course, with for dam body 2 downstream, lead the building bodies such as wall 3 construction provide
Condition.In the prior art, cofferdam 7, after the completion of whole building main body construction, needs to be removed completely；Therefore its quantities
Larger.And in the present invention it is only necessary to remove part cofferdam 7, the concrete cofferdam 7 needing to remove includes two parts, respectively
It is the unnecessary cofferdam on the first paragraph cofferdam 71 removed in step C and the part second segment cofferdam 72 removed in step D
721.Because cofferdam 7 needs to intercept river course, therefore the elevation of its top surface is often higher than corresponding to river course under normal circumstances whole year
Water level elevation, and sediment trapping bank 4 then requires water level elevation h2 when running less than dam, therefore it is required that the design top of sediment trapping bank 4
Face elevation h1 is typically less than h2's, and h2 is typically less than the elevation of top surface in cofferdam 7.Therefore, the present invention directly adopts portion
When the cofferdam 7 divided is as sediment trapping bank 4, need to remove the portion in the unnecessary cofferdam 721 of design elevation of top surface h1 exceeding sediment trapping bank 4
Point, specifically can refer to shown in accompanying drawing 7, so after removing unnecessary cofferdam 721, remaining part can be used as sediment trapping bank 4.When
So, more specifically, as shown in Figure 8, in the part in the unnecessary cofferdam 721 removing the design elevation of top surface h1 exceeding sediment trapping bank 4
When, the also dismountable second segment cofferdam 72 positioned at upstream part, to reduce width in river course flow direction for the sediment trapping bank 4.
Certainly, removing accordingly behind unnecessary cofferdam 721, needing to carry out the construction of concrete revetment 5 immediately, to guarantee
The stability of sediment trapping bank 4, because remaining cofferdam part 7 is usually the earth and rockfill dam that earth and stone material is piled up, therefore its water resistant stream
Scouring effect is poor it is necessary to setting concrete revetment 5 is protected.
Certainly, for the ease of the construction of concrete revetment 5, typically when removing unnecessary cofferdam 721 it is desirable to second segment cofferdam
72 upstream side corresponding actual water level elevation H decreases below the design elevation of top surface h1 of sediment trapping bank 4 to be built.So,
Even if after removing unnecessary cofferdam 721, also can be played to river course by remaining part cofferdam (i.e. accompanying drawing 7, the sediment trapping bank 4 in Fig. 8)
Interception result, be also that the construction of concrete revetment 5 afterwards provides condition simultaneously.In addition, when carrying out step D, due to
Remove the first paragraph cofferdam 71 being located in flood discharge section 21, therefore can have been carried out by opening the floodgate in flood discharge section 21
Flood discharge, with the upstream side corresponding actual water level elevation H reducing second segment cofferdam 72 further.Certainly, carrying out step D
When, also may be selected to be constructed accordingly within the dry season in river course, because within the dry season in river course, the water level in river course is high
Degree is generally minimum, therefore can be easier to meet execution conditions.
In addition, it is necessary to it is noted that due to the upstream side in sediment trapping bank 4, there is part all the time and be located at below the water surface, because
This carries out the construction relative difficult of concrete revetment 5 to this part, therefore, by entering when actual water level elevation H is relatively low as far as possible
Row construction, can reduce difficulty as far as possible.In addition, if it is necessary, the upstream side to sediment trapping bank 4 also can be abandoned be located at below the water surface
The construction of partial concrete revetment 5, or protect this part side slope using other modes；Enter for example with reinforcing bar web frame
Row slope protection.
In addition, also can in stepb, when carrying out the construction of building between dam body 2 and cofferdam 7, it may include to water inlet
The construction of canal 6；Accordingly in step E afterwards, the upper surface of inlet channel 6 is also equipped with a layer concrete bank protection 5.
In addition, for concrete revetment 5 thickness typically can according to the Slope ratio of sediment trapping bank 4, basic geology parameter and
The conditions such as flow rate of water flow comprehensively determine, are no longer discussed in detail herein.In addition, in practice of construction, the thickness phase of concrete revetment 5
For the height of sediment trapping bank 4 ratio very little (in order to make it easy to understand, therefore by concrete revetment 5 in the accompanying drawing of the present invention
Thickness draw relatively thick) although design elevation of top surface h1 in above-mentioned elaboration and the sediment trapping bank of indication in the accompanying drawings
For not including the thickness of concrete revetment 5, but the design elevation of top surface h1 for sediment trapping bank also can comprise in Practical Project
The thickness of concrete revetment 5.
Claims (8)
1. a kind of sediment trapping bank structure, including building the dam body (2) in river course (1), described dam body is divided into flood discharge section (21) and factory
Room section (22) it is characterised in that：Also include leading wall (3) and sediment trapping bank (4), described wall (3) of leading is arranged on flood discharge section (21) and factory
Between room section (22), and lead one end of wall (3) and be connected with dam body, lead wall (3) the other end upstream extend after with sediment trapping bank
(4) one end connects；Described sediment trapping bank (4) is arranged on the corresponding upstream of factory building section (22), and one end of sediment trapping bank (4) and river
The bank of road (1) side connects, and the other end of sediment trapping bank (4) is connected with leading wall (3)；Described sediment trapping bank (4) is by earth and stone material heap
Long-pending earth and rockfill dam, and a layer concrete shield is provided with the upstream side in sediment trapping bank (4), top surface and downstream side
Slope (5).
2. sediment trapping bank structure as claimed in claim 1 it is characterised in that：Described sediment trapping bank (4) flows to respect to river course
Setting, and sediment trapping bank (4) is upper is connected with river course (1) side bank with leading one end that wall (3) is connected and being located at sediment trapping bank (4) and go up
The downstream of one end.
3. sediment trapping bank structure as claimed in claim 1 it is characterised in that：Sediment trapping bank (4) and factory building section (22) dam body it
Between be provided with inlet channel (6), be also equipped with a layer concrete bank protection (5) in the upper surface of inlet channel (6).
4. sediment trapping bank structure as claimed any one in claims 1 to 3 it is characterised in that：The described elevation leading wall (3) with block
The elevation of husky bank (4) is consistent.
5. a kind of sediment trapping bank structure construction technique it is characterised in that：Described sediment trapping bank structure is to appoint in the claims 1 to 4
Structure described in one, comprises the steps：
A, build cofferdam (7) in river course to intercept river course, the two ends of cofferdam (7) are respectively with the both sides bank of river course (1) even
Connect；
B, carry out leading the construction of the building between wall (3), dam body (2) and dam body (2) and cofferdam (7) in cofferdam (7) downstream；
Described one end leading wall (3) is connected with cofferdam, and the other end leading wall (3) is connected with dam body；It is located at the dam body leading wall (3) side
(2) it is flood discharge section (21), be factory building section (22) positioned at the dam body leading wall opposite side；And it is located at and lead wall (3) side and and flood discharge
Section (21) corresponding one section of cofferdam is first paragraph cofferdam (71), and is located at and leads wall (3) opposite side and corresponding with factory building section (22)
One section of cofferdam is second segment cofferdam (72)；
After the completion of architecture construction between C, wall to be led (3), dam body (2) and dam body (2) and cofferdam (7), remove the completely
One section of cofferdam (71)；
D, after removing first paragraph cofferdam (71) completely, simultaneously when the corresponding actual water level of upstream side of second segment cofferdam (72)
After elevation H decreases below the design elevation of top surface h1 of sediment trapping bank (4) to be built, it is higher than above-mentioned for removing second segment cofferdam (72) upper
The unnecessary cofferdam (721) of the design elevation of top surface h1 of sediment trapping bank (4) to be built, and the part that second segment cofferdam (72) are left behind
It is sediment trapping bank (4)；
One layer concrete bank protection (5) is arranged on E, the upstream side in sediment trapping bank (4), top surface and downstream side.
6. sediment trapping bank structure construction technique as claimed in claim 5 it is characterised in that：In stepb, carry out dam body (2) with
The construction of the building between cofferdam (7) includes the construction to inlet channel (6)；Afterwards in step E, upper in inlet channel (6)
Surface is also equipped with a layer concrete bank protection (5).
7. sediment trapping bank structure construction technique as claimed in claim 5 it is characterised in that：When carrying out step D, flood discharge can be opened
Floodgate in section (21) carries out flood discharge, to reduce the corresponding actual water level of upstream side in second segment cofferdam (72) further
Elevation H.
8. the sediment trapping bank structure construction technique as any one of claim 5 to 7 it is characterised in that：Low water in river course
Carry out step D in phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814121.9A CN106400751A (en) | 2016-09-09 | 2016-09-09 | Sand blocking ridge structure and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814121.9A CN106400751A (en) | 2016-09-09 | 2016-09-09 | Sand blocking ridge structure and construction process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106400751A true CN106400751A (en) | 2017-02-15 |
Family
ID=57998949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610814121.9A Pending CN106400751A (en) | 2016-09-09 | 2016-09-09 | Sand blocking ridge structure and construction process thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN106400751A (en) |
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| CN107012836A (en) * | 2017-04-21 | 2017-08-04 | 中国科学院、水利部成都山地灾害与环境研究所 | Sill may and levee system |
| CN108128885A (en) * | 2017-12-28 | 2018-06-08 | 中国电建集团华东勘测设计研究院有限公司 | Eliminate the river channel ecology processing system of tidal waterway black and odorous water |
| CN114809045A (en) * | 2022-05-24 | 2022-07-29 | 四川省水利电力工程局有限公司 | Hydropower station factory building cofferdam structure and construction method thereof |
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Application publication date: 20170215 |