CN101487246A - Non-foundation ditch construction method for earth and rockfill dam - Google Patents
Non-foundation ditch construction method for earth and rockfill dam Download PDFInfo
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- CN101487246A CN101487246A CNA200910060755XA CN200910060755A CN101487246A CN 101487246 A CN101487246 A CN 101487246A CN A200910060755X A CNA200910060755X A CN A200910060755XA CN 200910060755 A CN200910060755 A CN 200910060755A CN 101487246 A CN101487246 A CN 101487246A
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Abstract
The invention provides a no-pit construction method for earth-rock dams, comprising the steps as follows: firstly, the slope toe of the upstream and the downstream of the dam body is filled with a closure dike so as to intercept the river; subsequently, the foundation enclosed by the closure dike and two banks is filled with sands, gravels or sand soils so as to form a dam foundation by a method of vibration compaction or ramming compaction; after the foundation is formed, other parts of the dam is completed according to the normal construction requirement. The no-pit construction method for earth-rock dam requires no cofferdam, saves anti-seepage systems relevant to the cofferdam, such as a cofferdam anti-seepage walls, an anti-seepage purdah or high-injection or inclined walls; during the construction process, water pumping of pit and plenty of pit excavation are not needed; meanwhile, construction at dry land can be carried out, plenty of investment can be saved, the construction speed can be greatly quickened, and the construction period of the engineering can be shortened.
Description
Technical field
The invention belongs to the earth-rock works in water conservancy, the construction of hydropower plant, provide a kind of foundation ditch that do not need to form, just can finish the job practices of its Foundation Design the construction of earth and rockfill dam.
Background technology
At present, water conservancy in the world, the earth-rock works in the hydroelectric project in order to satisfy the requirement of engineering, are handled the basis of dam well, all to carry out the construction of projects such as excavation of foundation pit, based process, and the construction of building a dam under the condition of water is arranged at rivers etc., have only and dam earlier, carry out then the cofferdam fill increase, seepage prevention of cofferdam holds one's breath, carry out work such as foundation ditch draws water again, after treating that all working is finished, make foundation ditch form the nonirrigated farmland after, carry out excavation of foundation pit and processing etc. again.In a word, must form foundation ditch earlier, the method for constructing in foundation ditch then is the program of building a dam in the modern times and must carry out.
The prior art major defect is: need do the cofferdam, carrying out the cofferdam increases, seepage prevention of cofferdam is held one's breath, after foundation ditch draws water etc. and to make foundation ditch form the nonirrigated farmland, carry out work such as excavation of foundation pit and construction again, increased a lot of work and engineering quantity like this, prolonged the engineering construction time simultaneously, caused a large amount of wastes.
Because this class engineering investment usually is huge, the duration is longer, reduces investment and reduction of erection time, investment is brought benefits fast, and crucial meaning is arranged.
Summary of the invention
The present invention will provide a kind of prior art formation foundation ditch earlier that overcome, and the shortcoming of carrying out the method existence of construction at dry land then in foundation ditch provides a kind of non-foundation ditch construction method for earth and rockfill dam.
The object of the present invention is achieved like this: a kind of non-foundation ditch construction method for earth and rockfill dam, and in original bed, fill the upstream earlier and clash dike, fill the downstream again and clash dike, form the upstream and clash dike, downstream and clash the basic scope that dike and two bank slopes surround; Clash dike, downstream in the upstream and clash in the basic scope that dike and two bank slopes surround the sand of backfill, grit or sand soil; On sand, grit or the sand soil face of backfill, shake and dash or strong sand, grit or sand soil and the original bed of encrypting backfill that ram; On sand, grit or the sand soil face that dashes or ram the encryption backfill by force that shake, the middle fine sand of backfill is finished the earth and rockfill dam foundation construction, and the construction of finishing dam body on this basis again builds up earth and rockfill dam.The middle fine sand thickness of backfill is 0.5m～1.0m.
Non-foundation ditch construction method for earth and rockfill dam beneficial effect provided by the invention is: (1) does not do the cofferdam.(2) owing to do not do the cofferdam, the seepage prevention system relevant with the cofferdam, as: material for diaphragm wall of Cofferdam, seepage proof curtain or high spray, sloping core etc. do not exist.(3) not needing to carry out foundation ditch draws water.(4) do not need to carry out a large amount of excavation of foundation pit.(5) realize construction at dry land equally.(6) pass the flood period safety more secure.(7) benefit of this technology maximum is to save a large amount of investments and greatly accelerates speed of application, shortens construction period of engineering.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a layout plan of the present invention.
Fig. 2 is the drawing in side sectional elevation of the vertical axis of dam of the present invention.
Arrow is represented water (flow) direction among Fig. 1.
The specific embodiment
The first step is removed earlier the rotten wood, foreign material of the river bed of original bed 1 dam foundation scope etc. under water, removes clear bank slope 2 upper epidermis turfs and root system of plant, life and industrial refuse etc.Second step, in original bed 1, earlier fill the upstream and clash dike 3 with ballast, fill the downstream with ballast after a while and clash dike 4, form the upstream and clash dike 3, downstream and clash the basic scope that dike 4 and two bank slopes 2 surround.In the 3rd step, clash dike 3, downstream in the upstream and clash in the basic scope that dike 4 and two bank slopes 2 surround backfill sand, grit or sand soil 5.In the 4th step, on 5 in the sand of backfill, grit or sand soil, shake and dash or strong sand, grit or sand soil 5 and the original bed 1 of encrypting backfill that ram.In the 5th step, dash or ram on 5 in the sand of encrypting backfill, grit or the sand soil the middle fine sand 6 of backfill 0.5m～1.0m by force shaking.The 6th step, the upstream clash dike 3, dike 4 is clashed in the downstream, as the part of the enrockment rib body of earth and rockfill dam upstream and downstream slope angle.
Finished for six steps and promptly finished the basis that non-foundation ditch construction method for earth and rockfill dam forms, can press common damming method and code requirement on this basis then, the impervious wall of constructing, finish enrockment rib body and dam body 7 parts.
Claims (2)
1, a kind of non-foundation ditch construction method for earth and rockfill dam is characterized in that: fill the upstream earlier and clash dike (3) in original bed (1), fill the downstream again and clash dike (4), form the upstream and clash dike (3), downstream and clash the basic scope that dike (4) and two bank slopes (2) surround; Clash dike (3), downstream in the upstream and clash in the basic scope that dike (4) and two bank slopes (2) surround the sand of backfill, grit or sand soil (5); On sand, grit or sand soil (5) face of backfill, shake and dash or strong sand, grit or sand soil (5) and the original bed (1) of encrypting backfill that ram; Dash or strong the rammer on sand, grit or sand soil (5) face of encrypting backfill shaking, the middle fine sand (6) of backfill is finished the earth and rockfill dam foundation construction, and the construction of finishing dam body (7) on this basis again builds up earth and rockfill dam.
2, non-foundation ditch construction method for earth and rockfill dam according to claim 1 is characterized in that: middle fine sand (6) thickness of backfill is 0.5m～1.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200910060755XA CN101487246A (en) | 2009-02-14 | 2009-02-14 | Non-foundation ditch construction method for earth and rockfill dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200910060755XA CN101487246A (en) | 2009-02-14 | 2009-02-14 | Non-foundation ditch construction method for earth and rockfill dam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101487246A true CN101487246A (en) | 2009-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA200910060755XA Pending CN101487246A (en) | 2009-02-14 | 2009-02-14 | Non-foundation ditch construction method for earth and rockfill dam |
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| CN (1) | CN101487246A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464053A (en) * | 2015-12-31 | 2016-04-06 | 长江勘测规划设计研究有限责任公司 | Low dam body with water filled with gravel sand through throwing and construction method for increasing relative density of dam body |
| CN105625272A (en) * | 2016-01-30 | 2016-06-01 | 清华大学 | 3 D building system and method for earth-rock dam |
| CN105887769A (en) * | 2016-05-18 | 2016-08-24 | 王燏斌 | Dam construction method |
| CN105926543A (en) * | 2016-05-18 | 2016-09-07 | 王燏斌 | Dam construction method |
| CN105951682A (en) * | 2016-05-18 | 2016-09-21 | 王燏斌 | Dam construction method |
-
2009
- 2009-02-14 CN CNA200910060755XA patent/CN101487246A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464053A (en) * | 2015-12-31 | 2016-04-06 | 长江勘测规划设计研究有限责任公司 | Low dam body with water filled with gravel sand through throwing and construction method for increasing relative density of dam body |
| CN105464053B (en) * | 2015-12-31 | 2017-05-24 | 长江勘测规划设计研究有限责任公司 | Low dam body with water filled with gravel sand through throwing and construction method for increasing relative density of dam body |
| CN105625272A (en) * | 2016-01-30 | 2016-06-01 | 清华大学 | 3 D building system and method for earth-rock dam |
| CN105887769A (en) * | 2016-05-18 | 2016-08-24 | 王燏斌 | Dam construction method |
| CN105926543A (en) * | 2016-05-18 | 2016-09-07 | 王燏斌 | Dam construction method |
| CN105951682A (en) * | 2016-05-18 | 2016-09-21 | 王燏斌 | Dam construction method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090722 |