CN105201009A - Tower foundation negative-pressure construction method for river channel - Google Patents
Tower foundation negative-pressure construction method for river channel Download PDFInfo
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- CN105201009A CN105201009A CN201510578641.XA CN201510578641A CN105201009A CN 105201009 A CN105201009 A CN 105201009A CN 201510578641 A CN201510578641 A CN 201510578641A CN 105201009 A CN105201009 A CN 105201009A
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Abstract
The invention provides a tower foundation negative-pressure construction method for a river channel. The quality of a tower foundation can be improved, and a tower can be stable and safe in the use process. The method comprises steps as follows: a dam is constructed on the upstream of a place where the river channel is to be constructed for drainage; construction is performed in the place where the river channel is to be constructed in a natural sloping heavy-excavation manner, and a water pump is used for draining river water seeping into a foundation pit to the downstream of the foundation pit in the excavation process; a square die formed by splicing four templates two by two is put in the center of the bottom surface of the foundation pit; the water pump is used for draining the water in the die and discharging the water to the downstream of the foundation pit; high-grade concrete is applied to the inner bottom surface of the die for blocking; a water pumping pipe of the water pump is put in the foundation pit outside the die, so that river water seeping into the foundation pit outside the die can be continuously discharged to the downstream of the foundation pit, and the water pumping port is located in the position 1/3-1/2 of the height of the die; the concrete is directly cast into the die after a steel reinforcement cage is put into the die and vibrated with a vibrator; the concrete is cured.
Description
Technical field
The present invention relates to a kind of pole and tower foundation negative pressure construction method for river course.
Background technology
Power department is when cross a river transmits electric power circuit, and when especially river surface is wider, part shaft tower is inevitably built in river course.Construct in river course pole and tower foundation time, foundation ditch to be dug out in river course, and put into mould in foundation ditch, the river in mould is discharged concreting in backward mould.Due to the sandstone in river course, soil loosely, the concrete mortar in mould can sandstone below mould, soil be leaked in the foundation ditch outside mould, causes pole and tower foundation of poor quality, shaft tower is in use easily toppled over, dangerous.
Summary of the invention
The present invention is to solve the problems of the technologies described above, and provide a kind of pole and tower foundation negative pressure construction method for river course, it can improve pole and tower foundation quality, guarantees shaft tower in use firm, safety.
For the pole and tower foundation negative pressure construction method in river course, its special character is, concrete steps are as follows:
1. drainage
On the fill dam, 5m-10m place, upstream of pre-job location, river is tackled, and do drainage and river is walked around pre-job location to downstream drain;
2. excavation of foundation pit
Adopt the heavy excavation form of natural discharging slope to construct in pre-job location, and use water pump to be discharged to foundation ditch downstream by the river infiltered in foundation ditch in the process of excavation; When running into drift sand, expand the excavation gradient, until dig designated depth;
3. place mould
Place at place of foundation ditch bottom center the square dies that is mutually spliced between two by four pieces of templates, and install additional to enclose outside mould and stupefied mould tightly to be fixed;
4. mould internal drainage
Water pump is used to be blotted by the water infiltered in mould and be discharged into the downstream of foundation ditch;
5. mould shutoff
High-grade concrete shutoff is smeared at the inner bottom part of mould;
6. the outer draining of mould
The drinking-water pipe of water pump is placed in the foundation ditch outside mould, makes to infilter river continued emissions in the outer foundation ditch of mould to foundation ditch downstream, and keep pump mouth to be positioned at the 1/3-1/2 position of mold height;
7. basis is built
Place in mould directly to concreting in mould after reinforcing cage, and vibrate with vibrator;
8. concrete curing
Natural Health preservation more than 30 days, switches off the pump, and removes mould, fulfils assignment.
Further, under, the expansion excavation gradient serious at drift sand can not eliminate the condition of drift sand impact, around foundation ditch, beat deal pile, place breast boards and stop drift sand.
Further, deal pile beats the place being not less than 200mm on distance foundation ditch limit, makes a call to one every being not more than 300mm.
The invention has the beneficial effects as follows: after the river infiltered in mould being drained owing to using water pump, high-grade concrete shutoff is smeared at the inner bottom part of mould, and the drinking-water pipe of water pump is placed in the foundation ditch outside mould, pump mouth is kept to be positioned at mould 1/3 to 1/2 height, make to infilter river continued emissions in the outer foundation ditch of mould to foundation ditch downstream, when ensureing that the river infiltered in the outer foundation ditch of mould does not diffuse in mould, at the high-grade concrete of mould inner bottom surface, water seal is carried out to shutoff, and prevent the water body at pumping for water pump mouth place from stirring destruction foundation ditch bottom surface, thus the concrete avoided in mould leaks, ensure the quality of pole and tower foundation, guarantee that shaft tower is in use firm, safety, and then ensured electric power safety operation.
Accompanying drawing explanation
Fig. 1 is construction schematic diagram of the present invention;
In figure: 1-dykes and dams, 2-foundation ditch, 3-water pump, 4-square dies, 5-encloses stupefied, 6-high-grade concrete, 7-deal pile, 8-breast boards, 9-column foot concrete.
Detailed description of the invention
Embodiment 1
As shown in the figure, a kind of pole and tower foundation negative pressure construction method for river course, its step is as follows:
1. drainage: on the fill dam, 6m place, upstream 1 of pre-job location, river is tackled, and do drainage and river is walked around pre-job location to downstream drain.
2. excavation of foundation pit: the heavy excavation form construction adopting natural discharging slope, and use water pump 3 to be discharged to foundation ditch 2 downstream by the river infiltered in foundation ditch 2 in the process of excavation; When running into drift sand, expand the excavation gradient, until dig designated depth.
Under, the expansion excavation gradient serious at drift sand can not eliminate the condition of drift sand impact, adopt and beat deal pile 7 around foundation ditch 2, place the construction method that breast boards 8 stops drift sand.
Deal pile 7 dozens, in the place of distance foundation ditch 2 limit 200mm, makes a call to one every 300mm.
3. place mould: place at place of foundation ditch 2 bottom center the square dies 4 that is mutually spliced between two by template, and install additional outside mould and enclose stupefied 5 mould is tightly fixed.
4. mould internal drainage: use water pump 3 blotted by the water infiltered in mould and be discharged into the downstream of foundation ditch 2.
5. mould shutoff: smear high-grade concrete 6 shutoff at the inner bottom part of mould.
6. the outer draining of mould: be placed on by the drinking-water pipe of water pump 3 in the foundation ditch 2 outside mould, makes to infilter river continued emissions in the outer foundation ditch 2 of mould to foundation ditch 2 downstream, and 1/3 place keeping pump mouth to be positioned at mould dispatching.
7. basis is built: directly to building column foot concrete 9 in mould place reinforcing cage in mould after, and vibrate with vibrator.
8. concrete curing: natural Health preservation, after 30 days, switches off the pump 3, removes mould, fulfils assignment.
Embodiment 2
As shown in the figure, a kind of pole and tower foundation negative pressure construction method for river course, its step is as follows:
1. drainage: on the fill dam, 8m place, upstream 1 of pre-job location, river is tackled, and do drainage and river is walked around pre-job location to downstream drain.
2. excavation of foundation pit: the heavy excavation form construction adopting natural discharging slope, and use water pump 3 to be discharged to foundation ditch 2 downstream by the river infiltered in foundation ditch 2 in the process of excavation; When running into drift sand, expand the excavation gradient, until dig designated depth.
Under, the expansion excavation gradient serious at drift sand can not eliminate the condition of drift sand impact, adopt and beat deal pile 7 around foundation ditch 2, place the construction method that breast boards 8 stops drift sand.
Deal pile 7 dozens, in the place of distance foundation ditch 2 limit 300mm, makes a call to one every 240mm.
3. place mould: place at place of foundation ditch 2 bottom center the square dies 4 that is mutually spliced between two by template, and install additional outside mould and enclose stupefied 5 mould is tightly fixed.
4. mould internal drainage: use water pump 3 blotted by the water infiltered in mould and be discharged into the downstream of foundation ditch 2.
5. mould shutoff: smear high-grade concrete 6 shutoff at the inner bottom part of mould.
6. the outer draining of mould: be placed on by the drinking-water pipe of water pump 3 in the foundation ditch 2 outside mould, makes to infilter river continued emissions in the outer foundation ditch 2 of mould to foundation ditch 2 downstream, and keeps pump mouth to be positioned at 1/2 place of mold height.
7. basis is built: directly to building column foot concrete 9 in mould place reinforcing cage in mould after, and vibrate with vibrator.
8. concrete curing: natural Health preservation, after 35 days, switches off the pump 3, removes mould, fulfils assignment.
Claims (3)
1., for the pole and tower foundation negative pressure construction method in river course, its step is as follows:
1), drainage
On the fill dam, 5m-10m place, upstream of pre-job location, river is tackled, and do drainage and river is walked around pre-job location to downstream drain;
2), excavation of foundation pit
Adopt the heavy excavation form of natural discharging slope to construct in pre-job location, and use water pump to be discharged to foundation ditch downstream by the river infiltered in foundation ditch in the process of excavation; When running into drift sand, expand the excavation gradient, until dig designated depth;
3), mould is placed
Place at place of foundation ditch bottom center the square dies that is mutually spliced between two by four pieces of templates, and install additional to enclose outside mould and stupefied mould tightly to be fixed;
4), mould internal drainage
Water pump is used to be blotted by the water infiltered in mould and be discharged into the downstream of foundation ditch;
5), mould shutoff
High-grade concrete shutoff is smeared at the inner bottom part of mould;
6), the outer draining of mould
The drinking-water pipe of water pump is placed in the foundation ditch outside mould, makes to infilter river continued emissions in the outer foundation ditch of mould to foundation ditch downstream, and keep pump mouth to be positioned at the 1/3-1/2 position of mold height;
7), basis is built
Place in mould directly to concreting in mould after reinforcing cage, and vibrate with vibrator;
8), concrete curing
Natural Health preservation more than 30 days, switches off the pump, and removes mould, fulfils assignment.
2. further, under, the expansion excavation gradient serious at drift sand can not eliminate the condition of drift sand impact, around foundation ditch, beat deal pile, place breast boards and stop drift sand.
3. further, deal pile beats the place being not less than 200mm on distance foundation ditch limit, makes a call to one every being not more than 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510578641.XA CN105201009B (en) | 2015-09-12 | 2015-09-12 | Tower foundation negative-pressure construction method for river channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510578641.XA CN105201009B (en) | 2015-09-12 | 2015-09-12 | Tower foundation negative-pressure construction method for river channel |
Publications (2)
| Publication Number | Publication Date |
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| CN105201009A true CN105201009A (en) | 2015-12-30 |
| CN105201009B CN105201009B (en) | 2017-01-25 |
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| CN201510578641.XA Active CN105201009B (en) | 2015-09-12 | 2015-09-12 | Tower foundation negative-pressure construction method for river channel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453729A (en) * | 2019-08-22 | 2019-11-15 | 中国建筑第七工程局有限公司 | Flexible particle waterproof protective layer construction punching block baffle assembly and construction method |
| CN110924425A (en) * | 2019-11-09 | 2020-03-27 | 国网辽宁省电力有限公司锦州供电公司 | Iron tower foundation construction method for river channel in winter |
| CN111809618A (en) * | 2020-08-04 | 2020-10-23 | 林瑞 | Power plant transmission tower foundation treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256573A (en) * | 2001-03-02 | 2002-09-11 | Chubu Electric Power Co Inc | Foundation for existing foundation reinforcing steel tower and construction method for it |
| CN104294839A (en) * | 2014-11-14 | 2015-01-21 | 句容华源电器设备有限公司 | High-voltage pole tower foundation construction method |
| CN104358271A (en) * | 2014-11-17 | 2015-02-18 | 句容华源电器设备有限公司 | High-voltage tower pole foundation construction method |
| CN104775438A (en) * | 2015-04-08 | 2015-07-15 | 国家电网公司 | Method for carrying out tower site foundation pit construction on karst landform foundation in rainy season |
-
2015
- 2015-09-12 CN CN201510578641.XA patent/CN105201009B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256573A (en) * | 2001-03-02 | 2002-09-11 | Chubu Electric Power Co Inc | Foundation for existing foundation reinforcing steel tower and construction method for it |
| CN104294839A (en) * | 2014-11-14 | 2015-01-21 | 句容华源电器设备有限公司 | High-voltage pole tower foundation construction method |
| CN104358271A (en) * | 2014-11-17 | 2015-02-18 | 句容华源电器设备有限公司 | High-voltage tower pole foundation construction method |
| CN104775438A (en) * | 2015-04-08 | 2015-07-15 | 国家电网公司 | Method for carrying out tower site foundation pit construction on karst landform foundation in rainy season |
Non-Patent Citations (2)
| Title |
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| 宋书伟: "浅水区铁塔基础的施工措施", 《农村电气化》 * |
| 郑江: "湖区铁塔基础施工方法研究", 《湖北电力》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453729A (en) * | 2019-08-22 | 2019-11-15 | 中国建筑第七工程局有限公司 | Flexible particle waterproof protective layer construction punching block baffle assembly and construction method |
| CN110924425A (en) * | 2019-11-09 | 2020-03-27 | 国网辽宁省电力有限公司锦州供电公司 | Iron tower foundation construction method for river channel in winter |
| CN111809618A (en) * | 2020-08-04 | 2020-10-23 | 林瑞 | Power plant transmission tower foundation treatment method |
| CN111809618B (en) * | 2020-08-04 | 2021-11-02 | 湖南湘投铜湾水利水电开发有限责任公司 | Power plant transmission tower foundation treatment method |
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| Publication number | Publication date |
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| CN105201009B (en) | 2017-01-25 |
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