CN112458932A - Non-cutoff connection method for single-hole water diversion box culvert - Google Patents
Non-cutoff connection method for single-hole water diversion box culvert Download PDFInfo
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- CN112458932A CN112458932A CN202011182568.1A CN202011182568A CN112458932A CN 112458932 A CN112458932 A CN 112458932A CN 202011182568 A CN202011182568 A CN 202011182568A CN 112458932 A CN112458932 A CN 112458932A
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- box culvert
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012946 outsourcing Methods 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 230000000903 blocking effect Effects 0.000 claims description 24
- 238000007689 inspection Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 241000282326 Felis catus Species 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 28
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a method for connecting single-hole water diversion box culverts without current interruption, wherein an outsourcing communicating well with a corresponding size is designed at the joint of a new box culvert and an old box culvert, a plurality of compartments are formed in the outsourcing communicating well, and temporary opening and closing steel gates are arranged among the compartments. The water flow direction and the water distribution in each compartment are controlled by adjusting the opening and closing of the steel gate, so that the waterless operation condition during construction is realized. When the old single-hole water diversion box culvert faces the problem of upgrading or local diversion, if the water diversion importance of the old single-hole water diversion box culvert does not allow temporary water cut-off construction, the new and old box culvert joining construction and the local diversion problem of the box culvert can be completed by adopting the technology on the premise of not influencing the overflowing capacity. The construction technology for connecting the single-hole water diversion box culvert with no cutoff has the advantage of not influencing the current water diversion box culvert overflowing capacity, and has the advantages of convenience in construction, no water environment pollution, no influence on construction period, small construction occupied area and the like.
Description
Technical Field
The invention relates to a non-stop connection method for a single-hole water diversion box culvert.
Background
In municipal works, the problem of updating and upgrading needs to be faced when the underground single-hole water diversion box culvert is close to the service life, and some important water passing channels cannot cut off water to form a dry operation construction environment due to the fact that the water passing channels greatly relate to civil life and social stability, so that the updating and upgrading of the box culvert faces a difficult problem of wet environment construction. In addition, the water quality in the diversion box culvert is ensured not to be polluted, and the water quality disaster of the downstream can be caused if dust, debris and the like generated in the conventional construction operation fall into the water.
Disclosure of Invention
The invention aims to solve the technical problem of creating dry construction conditions for the connecting sections of the new and old structures of the important single-hole water diversion box culvert, and provides a non-continuous-flow connection method for the single-hole water diversion box culvert.
The invention solves the technical problems through the following technical scheme: a single-hole water diversion box culvert non-stop connection method is characterized by comprising the following steps:
A. excavating an old box culvert to the bottom surface elevation of the bottom plate, reserving a connection area on the outer side, building an outer-wrapped inspection well in the connection area, and connecting the outer-wrapped inspection well with the old box culvert with embedded bars;
B. excavating and laying a new box culvert, connecting the new box culvert with the outsourcing inspection well, and arranging a gate at the connecting position of the new box culvert and the outsourcing inspection well;
C. and the outsourcing well between the old box culvert and the new box culvert is slowly filled with water until the water level is flush with the water level in the old box culvert. Adopting an underwater cutting process to open holes on the side wall of the old box culvert, and then opening a gate at the connecting position of the new box culvert and the outsourcing inspection well;
D. cutting off partial roof structures of the old box culvert at the downstream position of the old box culvert, arranging two water blocking structures, draining water between the adjacent water blocking structures, and implementing permanent wall plugging of the reinforced concrete;
E. after the strength of the permanent plugging wall reaches the design strength, the water blocking structure is removed, and the water flows of the new box culvert and the old box culvert are communicated;
F. and after the water flow of the new and old box culverts is smoothly communicated, recovering all the old box culverts according to the original state to cut off the roof plate structure, and newly building a beam plate structure on the upper part of the external pit to completely seal the external pit.
Furthermore, a partition wall is arranged in the outsourcing well to divide the outsourcing well into two cabins.
And D, in the step D, a water blocking structure is arranged in the old box culvert and adopts a bagged soil cofferdam or a steel gate.
The water blocking structure of the bagged soil cofferdam has the top width of the cofferdam more than or equal to 0.4m and ensures that the slopes on two sides are not steeper than 1: 1.0.
The steel gate water blocking structure is characterized in that a steel pipe pile is required to be installed firstly, then the steel gate is placed downwards, and the gap between the steel gate and a top plate is blocked temporarily by an air bag.
Further, adjacent water retaining structures are maintained at a distance and should meet the following requirements.
In the formula: s, net distance (m) between adjacent water retaining structures, wherein the water retaining structure S of the bagged soil cofferdam is equal to the distance between adjacent slope feet;
t-wall thickness (m) of the permanent plugging wall.
Further, the wall thickness of the permanent plugging wall should be not less than the wall thickness of the side wall of the old box culvert.
Furthermore, water between adjacent water blocking structures is pumped by a portable water pump, so that the dry land operation environment of the blocking wall is maintained.
Further, the outsourcing well structure bottom plate is slightly less than the new and old box culvert structure bottom plate in both sides, and outsourcing well structure bottom plate and the new and old box culvert structure bottom plate difference in height in both sides are not less than 0.50m to compromise the effect in desilting pond, improve water purity.
Furthermore, the top elevation H of the side wall of the outer packing well and the elevations H of the two sides of the terrace meet the requirement that H is H +0.50 and the unit m.
An outsourcing communicating well with a corresponding size is designed at the joint of the new box culvert and the old box culvert, a plurality of compartments are formed in the well, and a temporary opening and closing steel gate is arranged between the compartments. The water flow direction and the water distribution in each compartment are controlled by adjusting the opening and closing of the steel gate, so that the waterless operation condition during construction is realized. Under the premise of protecting water quality, the continuous flow construction connection operation of new and old box culverts is realized.
Preferably, if the outsourcing well adopts the same level concrete material as the box culvert, the original state can be kept after construction, and the outsourcing well becomes a part of the main structure, so that engineering materials are saved, and the outsourcing well can be used as a later-stage overhaul well.
The positive progress effects of the invention are as follows:
1. the communicated construction technology ensures that the original box culvert can not be cut off in the whole construction period, does not influence the downstream water supply operation, and ensures the production sustainability of the civil and related industries.
2. The construction technology of the invention guarantees the water quality in the box culvert during the construction period, reduces the time that the water body directly contacts construction dust and other construction wastes, and reduces the water body pollution as much as possible.
3. The construction technology of the invention has low construction cost and simple construction, the outer-wrapped communicating well can be reserved and used as an inspection well after the construction is finished, the construction is not abandoned, and the resource cost is saved.
Drawings
FIG. 1 is a plan view of a preferred embodiment of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
FIG. 3 is a schematic view of the construction steps of the present invention.
Fig. 4 is a sectional view B-B of fig. 3.
FIG. 5 is a second schematic view of the construction steps of the present invention.
Fig. 6 is a cross-sectional view C-C of fig. 5.
FIG. 7 is a third schematic view of the present invention.
Fig. 8 is a cross-sectional view of fig. 7.
The figure includes: the outsourcing well 1, old box culvert 2, new box culvert 3, steel gate 4, outsourcing access hole 5, grit chamber 6, old box culvert lateral wall trompil 7, fill water 8 in the new box culvert, cofferdam 9, permanent shutoff wall 10, old box culvert part roof excision 11, outsourcing well superstructure 12, old box culvert excision roof resumes 13.
Detailed Description
Like figure 1 ~ 2, excavation old box culvert to bottom plate bottom surface elevation and outside reserve linking region, at the newly-built outsourcing inspection shaft in linking region, outsourcing well 1 links to each other with 2 bar planting of old box culvert, and new box culvert 3 arranges in the outsourcing well outside, and the outsourcing well leans on newly-built box culvert side to set up steel gate 4. The size of reinforced concrete outsourcing well, the isoparametric of wall thickness all can carry out suitable adjustment according to new and old box culvert structure size, position, can satisfy different specification and dimension's old box culvert and new box culvert connection needs, and outsourcing well concrete grade is the same with box culvert concrete grade, and the outsourcing well upper portion divides into two cabins altogether. The division into two cabins is due to the difference of the two functions, and one cabin has the following functions: new and old box culvert structure of UNICOM has the flowing water, protects old box culvert lateral wall trompil region simultaneously. The two compartments function as follows: no flowing water flows, and only the hole opening area of the top plate of the old box culvert is protected. PS: because old box culvert needs the trompil, the trompil causes great harm to old structure easily, for preventing that the trompil region has the potential safety hazard, sets up the outsourcing well in the trompil outside, can be convenient for on the one hand and overhaul in the long term, gets up old structure protection on the one hand.
The outsourcing well sets up corresponding apron and cat ladder, and the later stage of being convenient for is to the maintenance and the maintenance of new and old box culvert linkage segment.
The outsourcing well structure bottom plate is slightly less than the new and old box culvert structure bottom plate in both sides, and outsourcing well structure bottom plate and the new and old box culvert structure bottom plate difference in height in both sides are not less than 0.50m to compromise the effect in desilting pond, improve water purity. The desilting pond regularly clears sand according to using actual conditions, and the professional staff gets into through the access & exit of outsourcing well and clears sand after new case culvert gate is closed during the sand removal.
And cutting off partial roof structures of the old box culvert at the downstream position of the old box culvert, and arranging two water blocking structures, wherein the water blocking structures adopt bagged soil cofferdams or steel gates. And a reinforced concrete permanent blocking wall is implemented between the two water blocking structures.
The water blocking structure of the bagged soil cofferdam has the top width of the cofferdam more than or equal to 0.4m and ensures that the slopes on two sides are not steeper than 1: 1.0. The steel gate water blocking structure is characterized in that a steel pipe pile is required to be installed firstly, then the steel gate is placed downwards, and the gap between the steel gate and a top plate is blocked temporarily by an air bag.
Further, adjacent water retaining structures are maintained at a distance and should meet the following requirements.
In the formula: s-net distance (m) between adjacent water retaining structures, and the water retaining structure S of the bagged soil cofferdam is equal to the distance between adjacent slope feet.
T-wall thickness (m) of the permanent plugging wall.
The concrete construction process of the connecting section of the new box culvert and the old box culvert comprises the following steps:
as shown in fig. 1 to 2, the first step: (1) newly-built outsourcing well 1, the shaft bottom, the wall of a well and old box culvert 2 adopt planting the reinforcing bar to connect.
(2) And a steel gate 4 is arranged at the side of the outsourcing well 1 close to the newly-built box culvert.
(3) And the old box culvert is kept for water supply.
As shown in fig. 3 to 4, the second step: (1) and the new box culvert 3, the outer covered wells between the old box culvert 2 and the new box culvert 3 are slowly filled with water until the water level is flush with the water level in the old box culvert 2. When new box culvert and old box culvert correspond the cabin body intercommunication, fill water operation to new box culvert and outsourcing well part, guarantee that new and old box culvert water level is the same, when avoiding amputating the lateral wall, rivers reposition of redundant personnel suddenly lead to supply water not enough, rivers velocity of flow too big, flow state disorder scheduling problem.
(2) The old box culvert is provided with holes 7 on the side wall, and the underwater cutting process is adopted, so that the damage range of the old box culvert structure is reduced as much as possible.
(3) The old box culvert cutting is operated by a professional diver underwater.
(4) And opening the new box culvert steel gate.
(5) The new box culvert has the water passing condition.
As shown in fig. 5 to 6, the third step: (1) and cutting off the top plate of the old box culvert part 11.
(2) Firstly, the 1# cofferdam is implemented, then the 2# cofferdam is implemented, and the cofferdam 9 is constructed underwater by professional divers.
(3) After the water between the two cofferdams is drained, the wall 10 is permanently plugged.
(4) And (4) after the two permanent plugging walls reach the design strength, removing the 1# cofferdam and the 2# cofferdam simultaneously.
As shown in fig. 7 to 8, the fourth step: (1) and recovering the cut roof structures of all the old box culverts.
(2) The overboard superstructure 12 is newly constructed.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A single-hole water diversion box culvert non-stop connection method is characterized by comprising the following steps:
A. excavating an old box culvert to the bottom surface elevation of the bottom plate, reserving a connection area on the outer side, building an outer-wrapped inspection well in the connection area, and connecting the outer-wrapped inspection well with the old box culvert with embedded bars;
B. excavating and laying a new box culvert, connecting the new box culvert with the outsourcing inspection well, and arranging a gate at the connecting position of the new box culvert and the outsourcing inspection well;
C. and the outsourcing well between the old box culvert and the new box culvert is slowly filled with water until the water level is flush with the water level in the old box culvert. Adopting an underwater cutting process to open holes on the side wall of the old box culvert, and then opening a gate at the connecting position of the new box culvert and the outsourcing inspection well;
D. cutting off partial roof structures of the old box culvert at the downstream position of the old box culvert, arranging two water blocking structures, draining water between the adjacent water blocking structures, and implementing permanent wall plugging of the reinforced concrete;
E. after the strength of the permanent plugging wall reaches the design strength, the water blocking structure is removed, and the water flows of the new box culvert and the old box culvert are communicated;
F. and after the water flow of the new and old box culverts is smoothly communicated, recovering all the old box culverts according to the original state to cut off the roof plate structure, and newly building a beam plate structure on the upper part of the external pit to completely seal the external pit.
2. The non-stop connection method for the single-hole water diversion box culvert according to claim 1, characterized in that: and D, arranging a water blocking structure in the old box culvert, wherein the water blocking structure adopts a bagged soil cofferdam or a steel gate.
3. The non-stop connection method for the single-hole water diversion box culvert according to claim 2, characterized in that: the water blocking structure of the bagged soil cofferdam has the top width of the cofferdam more than or equal to 0.4m and ensures that the slopes on two sides are not steeper than 1: 1.0.
4. The non-stop connection method for the single-hole water diversion box culvert according to claim 2, characterized in that: the steel gate water blocking structure is characterized in that a steel pipe pile is required to be installed firstly, then the steel gate is placed downwards, and the gap between the steel gate and a top plate is blocked temporarily by an air bag.
5. The non-stop connection method for the single-hole water diversion box culvert according to claim 2, characterized in that: the adjacent water retaining structures are kept at a certain distance and should meet the following requirements.
In the formula: s, net distance between adjacent water retaining structures;
t-wall thickness for permanent blocking.
6. The non-stop connection method for the single-hole water diversion box culvert according to claim 1, characterized in that: the wall thickness of the permanent plugging wall should be not less than the wall thickness of the side wall of the old box culvert.
7. The non-stop connection method for the single-hole water diversion box culvert according to claim 1, characterized in that: the outsourcing well sets up corresponding apron and cat ladder, and the later stage of being convenient for is to the maintenance and the maintenance of new and old box culvert linkage segment.
8. The non-stop connection method for the single-hole water diversion box culvert according to claim 1, characterized in that: water between adjacent water blocking structures is pumped by a portable water pump, so that the dry land operation environment of the blocking wall is maintained.
9. The non-stop connection method for the single-hole water diversion box culvert according to claim 7, characterized in that: the outsourcing well structure bottom plate is slightly less than the new and old box culvert structure bottom plate in both sides, and outsourcing well structure bottom plate and the new and old box culvert structure bottom plate difference in height in both sides are not less than 0.50m to compromise the effect in desilting pond, improve water purity.
10. The non-stop connection method for the single-hole water diversion box culvert according to claim 8, characterized in that: the top elevation H of the side wall of the outer packing well and the elevations H of the terraces on the two sides meet H + 0.50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011182568.1A CN112458932A (en) | 2020-10-29 | 2020-10-29 | Non-cutoff connection method for single-hole water diversion box culvert |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011182568.1A CN112458932A (en) | 2020-10-29 | 2020-10-29 | Non-cutoff connection method for single-hole water diversion box culvert |
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| CN112458932A true CN112458932A (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116219916A (en) * | 2023-03-23 | 2023-06-06 | 上海市政工程设计研究总院（集团）有限公司 | Pressure box culvert reconnection system under pressure and its construction method |
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| Title |
|---|
| 周维祥: "超大断面双孔压力输送污水箱涵不断水割接施工方法", 《特种结构》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116219916A (en) * | 2023-03-23 | 2023-06-06 | 上海市政工程设计研究总院（集团）有限公司 | Pressure box culvert reconnection system under pressure and its construction method |
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Application publication date: 20210309 |