CN110804993A - River regulation construction method - Google Patents
River regulation construction method Download PDFInfo
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- CN110804993A CN110804993A CN201911175345.XA CN201911175345A CN110804993A CN 110804993 A CN110804993 A CN 110804993A CN 201911175345 A CN201911175345 A CN 201911175345A CN 110804993 A CN110804993 A CN 110804993A
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- river
- river channel
- dredging
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
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Abstract
The invention discloses a river regulation construction method, relates to engineering construction technology, and is used for solving the problem that the river depth is increased to aggravate the river danger caused by the common river regulation construction, and the method comprises the following steps: constructing cofferdams, sequentially installing waterproof cofferdams in the river channel along the length direction of the river channel, and segmenting the river channel; dredging the river channel, starting from the upstream of the river channel, sequentially discharging water and sludge in a dredging section into a next dredging section, and backfilling and reinforcing the river bed after the sludge is cleaned; the river course is recovered, after the river course is cleaned and renovated, the cofferdam is dismantled, and the river water circulation is recovered; the invention has the following advantages and effects: the backfill and reinforcement after the desilting can recover the descending depth of the river channel due to the desilting, so that the river channel can keep the safe depth, the riverbed terrain is more flat after the turnover, and the riverbed terrain is not easily entangled by the complicated riverbed terrain after people fall into water, so that the construction method can reduce the danger of the river channel.
Description
Technical Field
The invention relates to engineering construction technology, in particular to a river regulation construction method.
Background
In the construction process of modern cities, city river channels are generally constructed in a matched manner, and the river channels are important components of city landscapes on one hand and are important support factors of city ecosystems on the other hand. The river channel has the functions of providing water sources for cities, transporting the cities, preventing flood and draining stagnant water, adjusting climate and purifying environment.
However, human production and life always generate some garbage, and the garbage can pollute the river channel after entering the river channel, so that the river channel is blocked, and the water body smells, and in such a case, the river channel needs to be treated.
At present, most of river regulation construction schemes are generally used for dredging the river channel, measures taken for dredging are generally only used for digging up sludge in the river channel by using an excavator, but river channel pollution is a periodic problem, as long as people are in production and life, some household garbage is always generated, the garbage can more or less enter the river channel again to cause the river channel to be silted again, and then periodic dredging work is carried out, so that the depth of the river channel can be deeper and deeper along with the increase of the number of times of dredging, the river channel is too deep, once people fall into water, the possibility of causing safety accidents is greatly increased, and therefore potential safety hazards exist in the regulation scheme.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a river channel renovation construction method, which can keep the river channel depth unchanged while realizing river channel renovation, thereby achieving the purpose of reducing the river channel danger.
The technical purpose of the invention is realized by the following technical scheme: a river regulation construction method comprises the following steps:
s1 cofferdams are built, waterproof cofferdams are sequentially arranged in the river channel along the length direction of the river channel, the river channel is segmented, and the area in two adjacent waterproof cofferdams serves as a dredging section;
s2, dredging the river channel, starting from the upstream of the river channel, discharging water in the dredging section into the next dredging section, excavating sludge in the river channel, backfilling and reinforcing the river bed after the sludge is cleaned, and cleaning the next dredging section in the same way;
s3, the river channel is recovered, and after the river channel is cleaned and renovated, the cofferdam is dismantled to recover the river water circulation.
By adopting the scheme, the way of building the cofferdam and dredging in sections can gradually discharge silt and sewage to the next dredging section along the river flow direction, and finally the last dredging section can be used for centralized cleaning, so that the number of times of transporting the silt in the construction process can be reduced, and the condition that the silt is leaked in the process of transporting the silt to pollute the surrounding environment of a river channel is avoided; and the backfill and the reinforcement after the dredging of the river channel are finished can recover the depth of the river channel reduced due to the dredging, so that the river channel keeps the same depth as the original depth, meanwhile, aquatic plants growing on the riverbed can be cleaned in the process, the terrain complexity of the riverbed is reduced, and the rescue is facilitated even if people fall into water, so that the danger of the river channel can be reduced.
The invention in a preferred example may be further arranged to: the cofferdam building method comprises the following steps: the method is characterized in that timber piles are sequentially driven into a stratum along the width direction of a river channel, then the timber piles are used as supports, waterproof plastic cloth is erected on one side of the downstream direction facing the timber piles, the lower portion, attached to a river bed, of the waterproof plastic cloth is folded, sand bags are laminated on the folded waterproof plastic cloth, the embankment portion is closed, and the sand bags are stacked on two sides of the waterproof plastic cloth and used as supports.
Through adopting above-mentioned scheme, the stake is used for providing the support to waterproof plastic cloth, and the sand bag is used for pushing down waterproof plastic cloth, prevents that waterproof plastic cloth from sliding for rivers can be blocked the separation, and the river course just can be cleared up in the segmentation under the effect in cofferdam like this, thereby reaches the purpose of conveniently clearing up the river course.
The invention in a preferred example may be further arranged to: when the sand bags are stacked, the sand bags are mutually occluded and staggered, the bag openings face the back water surface, the thickness is 50cm, the weight of each bag is over 30KG, the sand bags are required to be stacked flatly, and the fluctuation difference is not more than 30cm, so that the roughness is reduced.
Through adopting above-mentioned scheme, interlock each other between the sand bag is piled up, the gap between the sand bag can be reduced as far as possible to the staggered joint paving on the one hand, and on the other hand also can increase the mutual frictional force of sand bag for the sand bag is difficult to be washed away by rivers at the in-process that receives the rivers impact, thereby reaches the purpose that improves waterproof plastic cloth location steadiness.
The invention in a preferred example may be further arranged to: the specific method for excavating the sludge comprises the following steps: the method is characterized in that an excavator is used for layering from the upper layer to the lower layer in sequence from left to right, the excavation depth of each shovel is controlled to be about 1m, the distance of more than 1m is reserved for buffering when the shovel is close to a side slope, and the embankment is guaranteed not to be damaged by manual excavation and dredging.
By adopting the scheme, due to the action of gravity, if the sludge is dug from the bottom in the excavating process, the sludge above can collapse and the dug part below is filled, so that the sludge can be prevented from being refilled by the dug part from top to bottom by excavating from top to bottom, and the excavating efficiency is improved; meanwhile, the buffer is reserved more than 1m close to the side slope, so that the embankment can be prevented from being damaged during mechanical operation, and the dam has longer service life.
The invention in a preferred example may be further arranged to: the specific method for riverbed backfilling comprises the following steps: and (3) from the lowest part of the river bed, paving soil upwards according to horizontal layers for filling, filling along a slope is not required, a boundary ditch is strictly forbidden for filling, the laying thickness of each layer is limited to be 30cm, the height of the river bed in the same dredging section is balanced to rise, and a joint between two adjacent dredging sections is filled after the cofferdam is removed.
By adopting the scheme, on one hand, the backfilling can ensure that the river channel keeps safe water flow depth, and simultaneously, the backfilling can also cover a soft soil layer and aquatic plants on the river bed, so that the bottom of the river bed is more stable and firmer, and even if people fall into water, the people are not easily entangled by the complex terrain of the river bed, and thus, a person falling into water can have greater escape and rescue opportunities, thereby further reducing the danger of the river channel.
The invention in a preferred example may be further arranged to: and after the riverbed is filled, spreading river bed stones with round surfaces on the filling layer.
By adopting the scheme, after the river bed stones are filled, the riverbed can be further reinforced on the one hand, and on the other hand, the growth of aquatic plants can be hindered, so that the complexity of the topography of the riverbed is weakened, and the aim of improving the survival rate of people falling into water is fulfilled.
The invention in a preferred example may be further arranged to: the filling soil is residue soil mixed with soil and stones.
By adopting the scheme, the dregs contain the stones, so the stones are firm in texture, and after the stones are filled on the riverbed and the soil in the dregs is soaked by river water to be softened, the stones can still keep the riverbed at a certain hardness, so that the riverbed is firmer.
The invention in a preferred example may be further arranged to: the riverbed is required to be subjected to foundation reinforcement on an adjacent embankment part after being filled, and the specific reinforcement method comprises the following steps: the river bed bottom stones are built from bottom to top, during building, staggered joints are formed up and down, building is carried out inside and outside, stone-pulling is needed to be arranged if necessary, the stones are directly close, and large pores are blocked by broken stones, so that the stability of dry building stones is ensured.
By adopting the scheme, the river silt inevitably can loosen the soil layer near the river bank in the process of digging out, and the river water is soaked, so that the river bank is easy to sink and crack after being dug down for a long time, and the river bank can be supported and reinforced after bottom stones of the river bed are built, thereby achieving the effect of protecting the river bank.
In summary, the invention has at least one of the following advantages:
1. the backfill and reinforcement after the desilting can recover the depth of the river channel reduced due to the desilting, so that the river channel can keep safe depth, the riverbed terrain is more flat after the turnover, and the riverbed terrain is not easily entangled by the complicated riverbed terrain after people fall into water, so that the construction method can reduce the danger of the river channel;
2. the damage to the river levee caused by mechanical misoperation can be reduced by adopting manual excavation on the riverbed adjacent to the levee, and meanwhile, the river levee can be manufactured by subsequent reinforcing operation, so that the river levee has higher structural strength;
3. the operation of filling the bottom stones in the riverbed can enhance the hardness of the riverbed on one hand and can also hinder the growth of aquatic plants on the other hand, so that the complexity of the topography of the riverbed is weakened, and a person falling into water is not easy to be trapped by the complex topography, thereby achieving the purpose of further reducing the danger of the riverway.
Drawings
FIG. 1 is a construction flow chart of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a river regulation construction method includes the following steps:
s1 cofferdam construction, installing waterproof cofferdams in the river channel along the length direction of the river channel in sequence, segmenting the river channel, and the specific construction method of the cofferdams comprises the following steps: the method is characterized in that timber piles are sequentially driven into a stratum along the width direction of a river channel, then the timber piles are used as supports, waterproof plastic cloth is erected on one side of the downstream direction in the facing direction of the timber piles, steel wire winding is adopted between the waterproof plastic cloth and the timber piles for bundling up and fixing, the lower portion, attached to the river bed, of the waterproof plastic cloth is folded, sand bags are overlapped on the folded waterproof plastic cloth, the embankment portion is closed, and the sand bags are stacked on two sides of the waterproof plastic cloth and used as supports.
The sand bag takes soil-rock mixed muck mined in a mine field as a filler, and after the sand bag is filled into a woven bag, the bag opening is bound and fixed to prevent sand leakage. The sand bag should interlock each other when piling up, the staggered joint is laid, and the sack is towards the surface of a back of the body, and thickness 50cm, every bag weight is more than 30KG to require to put things in good order, its fluctuation difference should not be greater than 30cm, with the reduction roughness, and then reduce the size of caulking between the sand bag, thereby make the cofferdam have stronger waterproof, water shutoff.
After the cofferdam is built, when the riverway is formally renovated, the area in two adjacent waterproof cofferdams is used as a dredging section.
S2 dredging the river channel, discharging water in the dredging section to the next dredging section from the upstream of the river channel, excavating sludge in the river channel, sequentially discharging the excavated sludge to the next dredging section according to the water flow direction, and intensively transporting all the sludge by a transport vehicle after the sludge is concentrated in the dredging section at the last section so as to reduce the occurrence of the event of sludge leakage caused by multiple transportation in the dredging process and further pollution to the surrounding environment of the river channel.
The concrete method for excavating the sludge comprises the following steps: the method comprises the steps of sequentially carrying out layering from left to right from an upper layer to a lower layer by using an excavator, controlling the excavation depth of each shovel to be about 1m, reserving a distance of more than 1m for buffering when the shovel is close to a side slope, manually excavating and dredging to ensure that a bank is not damaged, paying attention to the dredging depth when manually dredging is carried out, avoiding touching a river bank foundation, and transferring residual silt which cannot be excavated into a next dredging section by using the excavator after the silt is flushed into the lowest position of a river bed by using a high-pressure water gun so as to clean all the dredging sections by using the same method.
The method is characterized in that the riverbed is required to be backfilled and reinforced after the sludge is cleaned, and the specific method for backfilling the riverbed comprises the following steps: the method comprises the steps of paving and filling soil upwards from the lowest part of a riverbed according to horizontal layering, wherein the filling soil is residue soil mixed with soil and stones, the ratio of clay to stones is 6:4, the filling cannot be performed along a slope during backfilling, a boundary ditch is strictly prevented from being formed during filling, the paving thickness of each layer is limited to 30cm, the height of the riverbed in the same dredging section rises uniformly, and joints between two adjacent dredging sections are filled after a cofferdam is removed.
Meanwhile, after the riverbed is filled, river bed stones with round and smooth surfaces are spread on the filling layer and used for reinforcing the riverbed, and meanwhile, the growth of aquatic plants on the riverbed is hindered, so that the terrain complexity of the riverbed is weakened.
The river bed needs to be subjected to foundation reinforcement on the adjacent embankment part after being filled, and the specific reinforcement method comprises the following steps: the river bed bottom stones are built from bottom to top, during building, staggered joints are formed up and down, building is carried out inside and outside, stone-pulling is needed to be arranged if necessary, the stones are directly close, and large pores are blocked by broken stones, so that the stability of dry building stones is ensured.
The stone that draws is interconnect's concrete between the stone, and its effect is mainly with the stone parcel, lets produce between the stone of mutual separation and link for form the overburden of one deck mutual consolidation between stone, the concrete, this layer of overburden can enough possess certain water permeability, possesses certain tensile crack strength again simultaneously, thereby reaches to support reinforced effect to the river levee.
S3 river course resumes, and the river course clearance renovation is accomplished the back, demolishs the cofferdam, will follow the low reaches when demolising and begin to tear open to going on toward the upper reaches along the river course in proper order, finally like this when the river course resumes the river circulation, because the upper reaches has the retaining effect under the effect of cofferdam, like this after demolising the cofferdam, flow thrust is comparatively powerful, can play the effect of flushing the clearance to the riverbed, and then makes the river can be cleaner, limpid.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A river regulation construction method is characterized by comprising the following steps:
s1 cofferdams are built, waterproof cofferdams are sequentially arranged in the river channel along the length direction of the river channel, the river channel is segmented, and the area in two adjacent waterproof cofferdams serves as a dredging section;
s2, dredging the river channel, starting from the upstream of the river channel, discharging water in the dredging section into the next dredging section, excavating sludge in the river channel, backfilling and reinforcing the river bed after the sludge is cleaned, and cleaning the next dredging section in the same way;
s3, the river channel is recovered, and after the river channel is cleaned and renovated, the cofferdam is dismantled to recover the river water circulation.
2. The river regulation construction method according to claim 1, wherein: the cofferdam building method comprises the following steps: the method is characterized in that timber piles are sequentially driven into a stratum along the width direction of a river channel, then the timber piles are used as supports, waterproof plastic cloth is erected on one side of the downstream direction facing the timber piles, the lower portion, attached to a river bed, of the waterproof plastic cloth is folded, sand bags are laminated on the folded waterproof plastic cloth, the embankment portion is closed, and the sand bags are stacked on two sides of the waterproof plastic cloth and used as supports.
3. The river regulation construction method according to claim 2, wherein: when the sand bags are stacked, the sand bags are mutually occluded and staggered, the bag openings face the back water surface, the thickness is 50cm, the weight of each bag is over 30KG, the sand bags are required to be stacked flatly, and the fluctuation difference is not more than 30cm, so that the roughness is reduced.
4. The river regulation construction method according to claim 1, wherein: the specific method for excavating the sludge comprises the following steps: the method is characterized in that an excavator is used for layering from the upper layer to the lower layer in sequence from left to right, the excavation depth of each shovel is controlled to be about 1m, the distance of more than 1m is reserved for buffering when the shovel is close to a side slope, and the embankment is guaranteed not to be damaged by manual excavation and dredging.
5. The river regulation construction method according to claim 1, wherein: the specific method for riverbed backfilling comprises the following steps: and (3) from the lowest part of the river bed, paving soil upwards according to horizontal layers for filling, filling along a slope is not required, a boundary ditch is strictly forbidden for filling, the laying thickness of each layer is limited to be 30cm, the height of the river bed in the same dredging section is balanced to rise, and a joint between two adjacent dredging sections is filled after the cofferdam is removed.
6. The river regulation construction method according to claim 5, wherein: and after the riverbed is filled, spreading river bed stones with round surfaces on the filling layer.
7. The river regulation construction method according to claim 5, wherein: the filling soil is residue soil mixed with soil and stones.
8. The river regulation construction method according to claim 1, wherein: the riverbed is required to be subjected to foundation reinforcement on an adjacent embankment part after being filled, and the specific reinforcement method comprises the following steps: the river bed bottom stones are built from bottom to top, during building, staggered joints are formed up and down, building is carried out inside and outside, stone-pulling is needed to be arranged if necessary, the stones are directly close, and large pores are blocked by broken stones, so that the stability of dry building stones is ensured.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501652A (en) * | 2020-03-18 | 2020-08-07 | 中铁十四局集团第四工程有限公司 | Comprehensive treatment method for sand bed riverway in plain area |
| CN111592181A (en) * | 2020-05-22 | 2020-08-28 | 苏州市相城生态建设管理有限公司 | Comprehensive purification treatment method for municipal river |
| CN111777296A (en) * | 2020-07-17 | 2020-10-16 | 广州利源工程咨询有限公司 | River channel construction section ground mud monitoring and processing method and device |
| CN111997076A (en) * | 2020-08-27 | 2020-11-27 | 河北省水利科学研究院 | Rapid temporary cofferdam construction method |
| CN112211211A (en) * | 2020-10-19 | 2021-01-12 | 湖州三通水利建设有限公司 | Method for bagging sandy soil to build cofferdam and cofferdam built by method |
| CN113250265A (en) * | 2021-06-18 | 2021-08-13 | 中铁四局集团有限公司 | River channel half-dry type dredging method |
| CN113293732A (en) * | 2021-05-21 | 2021-08-24 | 中建八局西南建设工程有限公司 | Construction method for non-stop excavation of riverway in restricted area |
| CN113638355A (en) * | 2021-08-20 | 2021-11-12 | 福建省红日水利水电工程有限公司 | Intelligent construction method for water conservancy river regulation engineering |
| CN113718702A (en) * | 2021-09-28 | 2021-11-30 | 上海市地矿工程勘察(集团)有限公司 | Construction process for protecting existing tunnel by unloading in river channel excavation |
| CN114032926A (en) * | 2021-11-25 | 2022-02-11 | 武汉一冶建筑安装工程有限责任公司 | Underwater backfill method |
| WO2022095494A1 (en) * | 2021-06-18 | 2022-05-12 | 中铁四局集团有限公司 | Dry desilting method for riverway |
| CN115045307A (en) * | 2022-04-13 | 2022-09-13 | 中国电建集团贵阳勘测设计研究院有限公司 | Transverse propelling filling construction method for longitudinal earth-rock cofferdam |
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| CN111501652B (en) * | 2020-03-18 | 2021-11-02 | 中铁十四局集团第四工程有限公司 | Comprehensive treatment method for sand bed riverway in plain area |
| CN111501652A (en) * | 2020-03-18 | 2020-08-07 | 中铁十四局集团第四工程有限公司 | Comprehensive treatment method for sand bed riverway in plain area |
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| CN112211211A (en) * | 2020-10-19 | 2021-01-12 | 湖州三通水利建设有限公司 | Method for bagging sandy soil to build cofferdam and cofferdam built by method |
| CN113293732A (en) * | 2021-05-21 | 2021-08-24 | 中建八局西南建设工程有限公司 | Construction method for non-stop excavation of riverway in restricted area |
| WO2022095494A1 (en) * | 2021-06-18 | 2022-05-12 | 中铁四局集团有限公司 | Dry desilting method for riverway |
| CN113250265A (en) * | 2021-06-18 | 2021-08-13 | 中铁四局集团有限公司 | River channel half-dry type dredging method |
| CN113638355A (en) * | 2021-08-20 | 2021-11-12 | 福建省红日水利水电工程有限公司 | Intelligent construction method for water conservancy river regulation engineering |
| CN113638355B (en) * | 2021-08-20 | 2022-07-15 | 福建省红日水利水电工程有限公司 | Intelligent construction method for water conservancy river regulation engineering |
| CN113718702A (en) * | 2021-09-28 | 2021-11-30 | 上海市地矿工程勘察(集团)有限公司 | Construction process for protecting existing tunnel by unloading in river channel excavation |
| CN113718702B (en) * | 2021-09-28 | 2023-02-17 | 上海市地矿工程勘察(集团)有限公司 | Construction process for protecting existing tunnel by unloading in river channel excavation |
| CN114032926A (en) * | 2021-11-25 | 2022-02-11 | 武汉一冶建筑安装工程有限责任公司 | Underwater backfill method |
| CN115045307A (en) * | 2022-04-13 | 2022-09-13 | 中国电建集团贵阳勘测设计研究院有限公司 | Transverse propelling filling construction method for longitudinal earth-rock cofferdam |
| CN115045307B (en) * | 2022-04-13 | 2024-01-23 | 中国电建集团贵阳勘测设计研究院有限公司 | Transverse pushing filling construction method of longitudinal earth-rock cofferdam |
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Application publication date: 20200218 |