CN118007744A - Construction method of steel caisson type bank pump house - Google Patents
Construction method of steel caisson type bank pump house Download PDFInfo
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- CN118007744A CN118007744A CN202410132228.XA CN202410132228A CN118007744A CN 118007744 A CN118007744 A CN 118007744A CN 202410132228 A CN202410132228 A CN 202410132228A CN 118007744 A CN118007744 A CN 118007744A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 87
- 239000010959 steel Substances 0.000 title claims abstract description 87
- 238000010276 construction Methods 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000013461 design Methods 0.000 claims abstract description 8
- 238000007667 floating Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 11
- 238000009412 basement excavation Methods 0.000 claims description 5
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006978 adaptation Effects 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a construction method of a steel caisson type shore pump house, which comprises the following steps: excavating a foundation bed underwater at a pump house design position; prefabricating a water operation platform with a hollow middle by using a steel buoyancy tank; hoisting the steel caisson to the middle of a water operation platform; the upper part of the steel caisson is connected with the side wall of the high steel caisson; binding pump house bottom plate steel bars in the box body, and pouring bottom plate concrete and high wallboard guide wall concrete; then connecting the side wall of the high-steel box body to the designed height, pouring concrete on the side wall of the pump room, floating the box body to the designed position of the pump room after the foundation is completed, and positioning; uniformly injecting water into the box body to finish the sitting of the box body, and leveling the box body; connecting a high pump room wall on the box body, and continuing to construct the internal structure of the pump room; and performing construction of an upper structure and a subsequent structure of the pump room. According to the steel caisson type shore pump house construction method disclosed by the invention, the steel caisson is used as a construction cofferdam and a concrete pouring template of the structural body, a strong correlation effect is generated with the structural body part, the traditional construction cofferdam is canceled, and the influence on the current river course flood navigation can be reduced.
Description
Technical Field
The invention relates to a construction method of a steel caisson type shore pump house, and belongs to the technical field of underwater construction.
Background
Along with the continuous and stable development of the economy in China, the energy demand is growing day by day, the thermal power generation is still a medium-flow whetspost for power supply in China, and the water supply is just like the life line of a power plant, but the condition of a plurality of power plant sites is common, and water taking engineering sometimes has to be placed in rivers and lakes.
The traditional construction cofferdam filling scheme is adopted, the engineering quantity is large, and the large riverbed resource is occupied, so that the influence on the existing overflow section is large, especially in a narrow river, the overflow section is small in water depth and large in flow velocity, and the traditional construction cofferdam is often not feasible. Therefore, the construction method suitable for the bank pump house arranged in the narrow river channel is continuously sought, the construction difficulty is reduced, the construction process can be simplified, the construction period is shortened, and the construction cost is reduced.
The patent CN116378673A proposes a construction method for recovering a pipe pushing jack in a two-stage well-forming sea under the condition of a seabed with a hard stone layer, a cofferdam is formed by installing a prefabricated steel caisson at a preset recovery position of a target sea area, water pumping and drainage are carried out on the cofferdam, dredging and secondary stone-making construction are carried out, a receiving well of the miniature tunnel pipe pushing jack is formed, and the miniature tunnel pipe pushing jack driven into the receiving well is recovered. Patent CN111733827a proposes a site deep foundation pit protection construction method under mud geology of a complex environment adjacent to a high-speed rail, and changes a protection construction method of a concrete bored pile and a jet grouting pile of a traditional foundation pit into a protection construction method of a concrete bored pile and a steel caisson, wherein the concrete bored pile mainly plays a role in shearing resistance, and the steel caisson plays a role in water prevention and sand prevention, so that a protection system of the whole deep foundation pit is formed. In the excavation process, the protection system of the concrete bored pile and the steel caisson ensures stability and safety of a foundation pit, and can prevent underground water and sand from flowing out when the underground water pressure is overlarge, so that existing lines are settled, and safety is ensured.
The steel caisson is adopted as a cofferdam or a protective structure in the research, so that the effects of water resistance, soil resistance and the like are achieved, but the steel caisson is not applicable to flowing riverways, the construction method cannot reduce the influence on the existing riverway flood and navigation, and the steel caisson does not have a strong correlation effect with a structural body part, so that the realization of the integrity, the integrity and the safety of the concrete structure at the lower part of a pump house is not facilitated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a construction method of a steel caisson type shore pump house, wherein the steel caisson is used as a construction cofferdam and a concrete pouring template of a structural body, has a strong correlation effect with the structural body, and can eliminate the traditional construction cofferdam, so that the influence on the current river course flood-passing navigation can be reduced.
In order to solve the technical problems, the invention adopts the following technical scheme:
A construction method of a steel caisson type shore pump house comprises the following steps:
Step a, excavating a foundation bed underwater at a pump house design position;
step b, prefabricating a water operation platform with a hollow middle by using a steel buoyancy tank, and fixing the water operation platform through anchoring;
C, manufacturing a steel caisson with an opening at the upper part of the first section, and then hoisting the steel caisson to a hollowed-out position in the middle of a water operation platform to carry out a water inlet flow;
Step d, after water is filled, connecting the side wall of the high steel caisson at the upper part of the steel caisson, and arranging a horizontal support beam system at the outer side of the steel caisson;
Step e, binding pump house bottom plate steel bars in the steel caisson body, and pouring bottom plate concrete and high wallboard guide wall concrete;
f, connecting the side wall of the high-steel box body to the designed height after the bottom plate is poured, pouring pump house side wall concrete to complete a foundation, floating the box body to the designed position of the pump house after the foundation is completed, and positioning;
Step g, uniformly injecting water into the box body after positioning is finished, ensuring that the box body uniformly sinks to a designed elevation, finishing the seating of the box body, leveling the box body, and pouring underwater concrete into a foundation bed at the outer side of the periphery of the box body to fix the box body;
step h, continuing to connect a high pump room wall on the box body, and after the self weight of the steel box completely resists buoyancy, pumping out water in the box, and continuing to construct the internal structure of the pump room;
and i, performing construction of an upper structure and a subsequent structure of the pump room.
In the step a, the underwater excavation foundation bed process comprises underwater impact crushing, small-sized long-arm backhoe excavation and floating mud bin clearing.
In the step c, the bottom plate and the side plate of the steel caisson are continuously fully welded, and hot-rolled channel steel is welded on the inner sides of the bottom plate and the side plate of the steel caisson at equal intervals.
In the step d and the step f, steel plate water stops are arranged at the joints of all the wallboards.
In the step g, the underwater concrete adopts C25 underwater concrete, and the minimum thickness is not less than 1m.
In the step i, after the construction is completed, the water inlet steel plate of the underwater box body is cut off.
The invention has the beneficial effects that: the invention provides a construction method of a steel caisson type shore pump house, which is characterized in that a steel caisson is arranged, so that a traditional construction cofferdam is canceled, the influence of construction on the existing river channel is reduced, and the construction period is shortened; meanwhile, the steel caisson is used as an outer template of the pump house bottom plate and the side wall concrete, so that the underwater dry construction of the large-volume pump house is realized, and the integrity, the integrity and the safety of the concrete structure at the lower part of the pump house are improved.
Drawings
FIG. 1 is a plan view of the relationship between a bank pump house and a bank river channel of the present invention;
FIG. 2 is a view of the foundation bed of the present invention excavated underwater;
FIG. 3 is a schematic view of the foundation trench of the underwater pump house of the present invention;
FIG. 4 is a cross-sectional view of a pump house of the present invention;
FIG. 5 is a cross-sectional view of a pump house according to one embodiment of the present invention;
FIG. 6 is a schematic elevational view of the steel caisson of the present invention;
FIG. 7 is a schematic view of a part of the enlarged structure of FIG. 6;
FIG. 8 is a photograph of a live view made by the waterborne working platform according to an embodiment of the present invention;
FIG. 9 is a photograph of a lifting live view of a steel caisson (head section) according to one embodiment of the present invention;
FIG. 10 is a photograph of an example of a steel caisson tie height of the present invention;
fig. 11 is a photograph of a live view of a finished product of a shore pump house according to an embodiment of the present invention.
Reference numerals in the drawings are as follows: in the figure: 1-a steel caisson bottom plate; 2-steel caisson side walls; 3-pump house bottom plate; 4-pump house side wall.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and the following examples are only for more clearly illustrating the technical aspects of the present invention, and are not to be construed as limiting the scope of the present invention.
FIG. 1 is a plan view of the relationship between a bank pump house and a bank river channel of the present invention.
The invention discloses a construction method of a steel caisson type shore pump house, which comprises the following steps:
Step one, excavating a foundation bed before sinking the caisson, and adopting underwater impact crushing, excavating a small long-arm backhoe and clearing a floating mud bin. The foundation bed is excavated underwater, the foundation bed is shown in figure 2, and the underwater pump house foundation trench is shown in figure 3. The cross section of the pump house of the present invention is shown in fig. 4 and 5.
Step two, in order to facilitate the water operation, a steel buoyancy tank is utilized to prefabricate a water operation platform with a hollowed-out middle, the platform is anchored and fixed, and a live-action photo is shown in fig. 8.
And thirdly, prefabricating a first section 1.25m of the steel caisson bottom plate 1 and the steel sinking side wall 2. As shown in fig. 6 and 7, the steel caisson is formed by welding 10mm thick steel plates, and the bottom plate and the side plates are continuously welded fully, so that water leakage is prevented, and corrosion prevention treatment is performed. The hot-rolled channel steel is welded on the inner sides of the bottom plate and the side plates of the steel caisson at equal intervals, and the channel steel plays a role of reinforcing a steel plate and also serves as a reinforcing steel bar cushion block of a wallboard of a pump house. After corrosion prevention is finished, the box body is hoisted into water, and the box body is watered for 0.2m, and a hoisting live-action photo is shown in fig. 9. The steel caisson is used as a construction cofferdam of the shore pump house and an outer side template for concrete pouring, so that dry operation construction of the shore pump house is realized, and adverse effects of construction operation on water passing, navigation and the like of the existing river are reduced.
And fourthly, after water is filled, the side wall of the high steel box is connected to 5m, a horizontal support beam system is arranged at the position of 3m, and a steel caisson height-connecting live-action photo is shown in fig. 10.
And fifthly, binding 3 steel bars of a bottom plate of the pump house in the box body, pouring bottom plate concrete and 300mm high wallboard guide wall concrete, wherein the total draft of the box body is 2.5m.
Step six, after the bottom plate is poured, the height of the side wall 2 of the high steel box body is 3.8m to the design height, the draft is increased by 0.16m, and then the pump house side wall concrete is poured by 3m. The total buoyancy of the steel caisson is ensured to be larger than the total dead weight of the body and the poured concrete in the steel caisson in the construction process. And after the foundation is completed, the river box body floats to the design position of the pump house and is positioned.
The design elevation of the pump house foundation is 68.2m, and the real-time water level of the river channel is about 76.1 m. The water depth is 76.1m-68.2 m=7.9m. When the steel caisson moves to the design position, the draft is 5.5m, the distance between the bottom of the caisson and the foundation is 7.9 m-5.5m=2.4m, and the height of the caisson above the water surface of the river is 3.3 m. At this time, the height of the wall is 1.4m, the draft is 38.91 multiplied by 1.4 multiplied by 2.5/103.5 approximately equal to 1.32m, the distance from the foundation surface is 2.4m-1.32 m=1.08 m, and the height of the steel caisson above the water surface is 1.98 m. A certain safety distance is reserved between the pump house and the design foundation surface, so that the positioning and deviation correction are facilitated when the pump house sinks.
And seventhly, uniformly injecting water into the box body after positioning is finished, ensuring that the box body uniformly sinks to a designed elevation, finishing the box body sitting, leveling the box body, and pouring underwater concrete into a foundation bed at the outer side of the periphery of the box body to fix the box body. The underwater concrete adopts C25 underwater concrete, and the minimum thickness is not less than 1m.
And step eight, continuing to connect with the side wall 4 of the pump room, and after the dead weight of the steel box completely resists the buoyancy, pumping out water in the box, and continuing to construct the internal structure of the pump room. All structures are constructed above the horizontal plane, so that the construction quality of concrete is ensured. All wallboard joints all set up the steel sheet waterstop.
And step nine, finally completing construction of an upper structure and a subsequent structure of the pump house, and cutting off a water inlet steel plate of the underwater box body after the construction is completed, wherein a live-action photo of a finished product of the pump house on the bank side is shown in fig. 11.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (6)
1. A construction method of a steel caisson type shore pump house is characterized by comprising the following steps: the method comprises the following steps:
Step a, excavating a foundation bed underwater at a pump house design position;
step b, prefabricating a water operation platform with a hollow middle by using a steel buoyancy tank, and fixing the water operation platform through anchoring;
C, manufacturing a steel caisson with an opening at the upper part of the first section, and then hoisting the steel caisson to a hollowed-out position in the middle of a water operation platform to carry out a water inlet flow;
Step d, after water is filled, connecting the side wall of the high steel caisson at the upper part of the steel caisson, and arranging a horizontal support beam system at the outer side of the steel caisson;
Step e, binding pump house bottom plate steel bars in the steel caisson body, and pouring bottom plate concrete and high wallboard guide wall concrete;
F, after the bottom plate is poured, the side wall of the box body is heightened to the designed height, then concrete of the side wall of the pump room is poured, a foundation is completed, and after the foundation is completed, the box body is floated to the designed position of the pump room and is positioned;
Step g, uniformly injecting water into the box body after positioning is finished, ensuring that the box body uniformly sinks to a designed elevation, finishing the seating of the box body, leveling the box body, and pouring underwater concrete into a foundation bed at the outer side of the periphery of the box body to fix the box body;
step h, continuing to connect a high pump room wall on the box body, and after the self weight of the steel box completely resists buoyancy, pumping out water in the box, and continuing to construct the internal structure of the pump room;
and i, performing construction of an upper structure and a subsequent structure of the pump room.
2. The steel caisson type shore pump house construction method according to claim 1, wherein the method comprises the following steps: in the step a, the underwater excavation foundation bed process comprises underwater impact crushing, small-sized long-arm backhoe excavation and floating mud bin clearing.
3. The steel caisson type shore pump house construction method according to claim 1, wherein the method comprises the following steps: in the step c, the bottom plate and the side plate of the steel caisson are continuously fully welded, and hot-rolled channel steel is welded on the inner sides of the bottom plate and the side plate of the steel caisson at equal intervals.
4. The steel caisson type shore pump house construction method according to claim 1, wherein the method comprises the following steps: in the step d and the step f, steel plate water stops are arranged at the joints of all the wallboards.
5. The steel caisson type shore pump house construction method according to claim 1, wherein the method comprises the following steps: in the step g, the underwater concrete adopts C25 underwater concrete, and the minimum thickness is not less than 1m.
6. The steel caisson type shore pump house construction method according to claim 1, wherein the method comprises the following steps: in the step i, after the construction is completed, the water inlet steel plate of the underwater box body is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410132228.XA CN118007744A (en) | 2024-01-31 | 2024-01-31 | Construction method of steel caisson type bank pump house |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410132228.XA CN118007744A (en) | 2024-01-31 | 2024-01-31 | Construction method of steel caisson type bank pump house |
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| CN118007744A true CN118007744A (en) | 2024-05-10 |
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| CN202410132228.XA Pending CN118007744A (en) | 2024-01-31 | 2024-01-31 | Construction method of steel caisson type bank pump house |
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- 2024-01-31 CN CN202410132228.XA patent/CN118007744A/en active Pending
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