CN110747860A - Construction method for stripping and backfilling surface soil of water system - Google Patents
Construction method for stripping and backfilling surface soil of water system Download PDFInfo
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- CN110747860A CN110747860A CN201911029243.7A CN201911029243A CN110747860A CN 110747860 A CN110747860 A CN 110747860A CN 201911029243 A CN201911029243 A CN 201911029243A CN 110747860 A CN110747860 A CN 110747860A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a construction method for stripping and backfilling surface soil of a water system. The construction method for stripping and backfilling surface soil of the water system comprises the following steps: s1: building a cofferdam at the boundary of the construction area and building a temporary drainage ditch; s2: pumping water in the construction area into a temporary drainage ditch; s3: stripping surface soil of the construction area, and leveling, shaping and slope finishing and protecting the construction area after the surface soil is stripped; s4: and filling sand into the construction area, and flatly filling the sand into the construction area. The construction method of water system surface soil stripping and backfilling is suitable for water-containing land, during construction, firstly, cofferdams and temporary drainage ditches are built at the boundaries of construction areas, the water-containing land is pumped out to the temporary drainage ditches, then, surface soil stripping is carried out in the construction areas, and finally, sand filling and leveling are carried out in the construction areas. The construction method for stripping and backfilling the surface soil of the water system is simple to operate, successfully strips the surface soil containing water out, and avoids the waste of the surface soil with fertile surface soil containing water.
Description
Technical Field
The invention belongs to the technical field of land finishing, and particularly relates to a construction method for stripping and backfilling surface soil of a water system.
Background
The topsoil is the highest layer of earth, and the quarternary alluvial layer and rock weathering zone overlying the bedrock are commonly referred to as topsoil layers. The surface soil layer has soft soil, poor stability, large change, generally rich water content and rich organic matters and microorganisms. Is where most of the ecological activities on the earth take place, where plants also absorb nutrients, and where most of their roots also grow.
With the development of society and the enhancement of ecological environmental awareness, in order to save resources and protect the environment to the greatest extent, surface soil suitable for heavier plants is peeled off when a construction land or an open land is used for storage, greening, soil improvement or other purposes. In the prior art, surface soil stripping and backfilling construction is usually applied to construction land or open land, a direct filling method is usually adopted for water-containing land, and surface soil in a water system is more fertile due to material deposition, so that the fertile soil is wasted due to direct filling.
Disclosure of Invention
In order to solve the technical problems, the invention provides a water system surface soil stripping and backfilling construction method, which aims to solve the technical problem of fertile soil waste caused by direct filling of the existing water-containing land.
The technical scheme of the construction method for stripping and backfilling surface soil of the water system is as follows:
the construction method for stripping and backfilling the surface soil of the water system comprises the following steps:
s1: building a cofferdam at the boundary of the construction area and building a temporary drainage ditch;
s2: pumping water in the construction area into a temporary drainage ditch;
s3: stripping surface soil of the construction area, and leveling, shaping and slope finishing and protecting the construction area after the surface soil is stripped;
s4: and filling sand into the construction area, and flatly filling the sand into the construction area.
As a further improvement to the technical scheme, in step S1, the construction area comprises a water-bearing section and a non-water-bearing section, the width of the top of the cofferdam positioned at the boundary of the water-bearing section is 0.8-1 meter, the height of the cofferdam is 1.4-1.6 meters, the width of the top of the cofferdam positioned at the boundary of the non-water-bearing section is 0.8-1 meter, and the height of the cofferdam is 0.7-0.8 meter.
As a further improvement of the above technical means, in step S3, a yard is built before the construction area is stripped of surface soil, and a drainage facility for collecting water is installed in the yard.
As a further improvement of the above technical solution, in step S3, the top soil piled in the yard is compacted, and grass seeds are sprayed on the surface of the compacted top soil.
As a further improvement to the above technical solution, in step S4, accumulated water in the construction area is drained before sand filling, and roots, weeds and corrosive substances in the construction area are removed.
As a further improvement to the above technical solution, stones with a diameter greater than 20cm are removed from the construction area.
As a further improvement to the above technical solution, in step S4, sand is dredger filled into the construction area by using a pressure pump ship, and the level of the sand filled into the construction area is 0.2 m lower than the top of the cofferdam.
Compared with the prior art, the construction method for stripping and backfilling the surface soil of the water system has the beneficial effects that:
the construction method of water system surface soil stripping and backfilling is suitable for water-bearing land, during construction, firstly, cofferdams and temporary drainage ditches are built at the boundaries of construction areas, water in the water-bearing land is pumped out to the temporary drainage ditches, then, surface soil stripping is carried out in the construction areas, and finally, sand filling and leveling are carried out in the construction areas. The construction method for stripping and backfilling the surface soil of the water system is simple to operate, successfully strips the surface soil containing water out, and avoids the waste of the surface soil with fertile surface soil containing water.
Drawings
FIG. 1 is a flow chart of the water system topsoil stripping and backfilling construction method of the present invention;
FIG. 2 is a sectional view of a cofferdam containing water section in the construction method of water system topsoil stripping and backfilling of the invention;
FIG. 3 is a sectional view of a non-water-containing section cofferdam in the water system topsoil stripping and backfilling construction method of the present invention;
in the figure: 1. a construction area; 2. a temporary drainage ditch; 3. cofferdam of water-bearing section; 4. a bottom surface of the water-bearing section; 5. a non-water-bearing section cofferdam; 6. and (4) the ground.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The concrete embodiment of the construction method for stripping and backfilling the surface soil of the water system disclosed by the invention comprises the following steps as shown in figure 1: s1: building a cofferdam at the boundary of the construction area 1 and building a temporary drainage ditch 2;
s2: pumping water in the construction area 1 into the temporary drainage ditch 2;
s3: stripping surface soil of the construction area 1, and leveling, shaping and slope finishing protection are carried out on the construction area 1 after the surface soil is stripped;
s4: and filling sand into the construction area 1, and flatly filling the sand into the construction area 1.
Specifically, in step S1, the construction area 1 includes a water-bearing section and a non-water-bearing section. The cofferdam comprises a water-bearing section cofferdam 3 arranged at the boundary of the water-bearing section and a non-water-bearing section cofferdam 5 arranged at the boundary of the non-water-bearing section. Referring to fig. 2, the width H of the top of the water-containing section cofferdam 3 is 0.8-1 m, and the height H of the water-containing section cofferdam 3 is 1.4-1.6 m. In this embodiment, the section of the water-containing section cofferdam 3 is isosceles trapezoid, and the included angle between the inclined plane of the water-containing section cofferdam 3 and the water-containing section bottom surface 4 is 45 degrees. Referring to FIG. 3, the width H1 of the top of the non-water-bearing-section cofferdam 5 is 0.8 to 1 m, and the height H1 of the non-water-bearing-section cofferdam 5 is 0.7 to 0.8 m. In this embodiment, the section of the non-water-containing section cofferdam 5 is isosceles trapezoid, and the included angle between the inclined plane of the non-water-containing section cofferdam 5 and the ground 6 is 45 °.
The section of the temporary drainage ditch 2 is in an inverted isosceles trapezoid shape, the temporary drainage ditch 2 is a soil edge ditch, the width of the bottom surface of the temporary drainage ditch 2 is 0.5 m, and the excavation slope rate is 1: 0.5.
In order to utilize the surface soil resources more reasonably, in step S3, before construction, the surface soil in the construction area 1 and the construction temporary facilities is stripped, that is, after the sundries such as grass and trees and gravel on the surface are cleaned up manually, the soil for planting is excavated in the depth range of 30cm below the surface soil by adopting a construction mode mainly using a loader and manually using an auxiliary machine, and the larger residual roots and stones are removed and are piled up in a temporary yard in a centralized manner, and are used for road greening planting in the later period.
Before the surface soil is stripped, a stacking yard is built, and drainage facilities are arranged on the periphery of the stacking yard and used for collecting pumping tail water. The stacking yard should occupy the vacant space in the yard as much as possible to avoid the land (controlled by 25m outside the red line) for planning and constructing municipal public building supporting facilities. Meanwhile, factors such as safe stacking, convenient backfilling and the like are considered, so that the transportation cost is reduced, and people are far away. The filling height of the yard should meet the stability requirement of the side slope of the yard, and instability is prevented; and avoids the generation of large post-construction settlement to cause surface soil waste. On the premise of meeting the conditions, the roadbed filling height is increased as much as possible, and the land for storage yards is reduced. And (4) adopting a bulldozer to doze the surface soil to a temporary storage area, then using an automobile to transport the surface soil to a yard, and adopting a backhoe excavator to cooperate with partial positions. When the soil is piled, the soil is piled up from the temporary block position to the back in sequence, and necessary compaction treatment is carried out at the same time. After the top soil is stacked, the surface of the soil body is temporarily covered by spray-seeding grass seeds, and the storage time of the top soil is considered according to 18 months.
In step S4, the sand for filling sand is sand, the bagged sand bag is a woven geotextile bag, the woven sack is set according to the section of the cofferdam, the fullness of the bagged sand bag is 85%, and the bag is stacked in layers. Accumulated water in the construction area 1 is drained before sand filling, tree roots, weeds and humus in the construction area 1 are removed, and stones and bricks with the diameter larger than 20cm are removed out of the construction area 1.
In this embodiment, the sand filling adopts a hydraulic fill process. Specifically, the construction steps of hydraulic filling sand include sand taking, transportation, mooring, hydraulic filling to the construction area 1 and mechanical leveling.
A pressurizing pump ship for dredger fill sand construction is arranged near an existing wharf, a transverse anchor is thrown out from the left side and the right side of the existing wharf respectively, the length of a cable is about 30-40 m, an anchor position is slightly towards the stern direction when the cable is thrown out, and two steel piles of the stern are adopted to alternately fix the ship position. Along with the progress of the hydraulic filling construction, the ship position moves according to the actual position according to the specific conditions such as the specified sand taking area range, the self row pitch and the like. The sand carrier is arranged on the west side of the pressure pump ship, sea sand is directly discharged in the hopper ship and is filled from east to west to a construction site through a high-density clinker sand conveying pipe of DN 500.
The embankment crossing pipeline is implemented by combining a steel pipe with the diameter of 700mm, a hose and a steel bent pipe. When the sand blowing pipe passes through the dike, a steel plate with the thickness of 1cm and a rubber pad with the thickness of 2cm are sequentially cushioned from top to bottom below the position where the pipeline is in contact with the slope surface, so that the pressure borne by the slope surface is dispersed and transmitted to the dike body, and the stress is dispersed. When the sand blowing pipeline passes through the road in the embankment, in order to prevent the road in the embankment from directly bearing the concentrated stress of the pipeline passing through the road, a steel plate with the thickness of 1.2cm, a rubber pad with the thickness of 2cm and sand with the thickness of 15cm are sequentially padded under the steel pipe from top to bottom.
The pressure pump sand carrier pumps sand on the transportation sand carrier directly to the construction area 1, and assists in carrying out sand transportation and supply by 10 transportation sand carriers so as to meet the requirement of pumping work of the pressure pump sand carrier. The sand conveying pipe is arranged on the cofferdam in a diameter of 25-40 cm and is pumped in the direction of the self-arranged drainage facility. And a sedimentation tank is arranged near the sand material stacking yard, and pumping tail water is precipitated and filtered by the sedimentation tank and then discharged to an outside river surge area.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (7)
1. The construction method for stripping and backfilling surface soil of the water system is characterized by comprising the following steps: the method comprises the following steps:
s1: building a cofferdam at the boundary of the construction area and building a temporary drainage ditch;
s2: pumping water in the construction area into a temporary drainage ditch;
s3: stripping surface soil of the construction area, and leveling, shaping and slope finishing and protecting the construction area after the surface soil is stripped;
s4: and filling sand into the construction area, and flatly filling the sand into the construction area.
2. The water system topsoil stripping and backfilling construction method according to claim 1, characterized in that: in step S1, the construction area comprises a water-bearing section and a non-water-bearing section, the width of the top of the cofferdam positioned at the boundary of the water-bearing section is 0.8-1 meter, the height of the cofferdam is 1.4-1.6 meters, the width of the top of the cofferdam positioned at the boundary of the non-water-bearing section is 0.8-1 meter, and the height of the cofferdam is 0.7-0.8 meter.
3. The water system topsoil stripping and backfilling construction method according to claim 1, characterized in that: in step S3, a yard is built before the construction area is subjected to topsoil stripping, and a drainage facility for collecting water is installed in the yard.
4. The water system topsoil stripping and backfilling construction method according to claim 3, characterized in that: in step S3, the top soil piled in the yard is compacted, and grass seeds are sprayed on the compacted top soil.
5. The water system topsoil stripping and backfilling construction method according to claim 1, characterized in that: in step S4, accumulated water in the construction area is drained before sand filling, and roots, weeds, and corrosive substances in the construction area are removed.
6. The water system topsoil stripping and backfilling construction method according to claim 5, characterized in that: in step S4, stones with a diameter greater than 20cm are removed from the construction area.
7. The water system topsoil stripping and backfilling construction method according to claim 1, characterized in that: in step S4, sand is dredger filled into the construction area using a pressure pump ship, and the level of the sand filled into the construction area is 0.2 m lower than the top of the cofferdam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911029243.7A CN110747860A (en) | 2019-10-25 | 2019-10-25 | Construction method for stripping and backfilling surface soil of water system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911029243.7A CN110747860A (en) | 2019-10-25 | 2019-10-25 | Construction method for stripping and backfilling surface soil of water system |
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| CN110747860A true CN110747860A (en) | 2020-02-04 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000152719A (en) * | 1998-11-19 | 2000-06-06 | Kantou Regional Constr Bureau Ministry Of Constr | Bag body for greening and vegetation, and greening, vegetation and protection of face of slope of shallow water region |
| CN102301847A (en) * | 2011-06-22 | 2012-01-04 | 中国矿业大学(北京) | Construction method for land arrangement of rolling ground by topsoil stripping and backfilling |
| CN106801424A (en) * | 2017-01-18 | 2017-06-06 | 杭州天顺市政园林工程有限公司 | A kind of cofferdam construction method |
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2019
- 2019-10-25 CN CN201911029243.7A patent/CN110747860A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000152719A (en) * | 1998-11-19 | 2000-06-06 | Kantou Regional Constr Bureau Ministry Of Constr | Bag body for greening and vegetation, and greening, vegetation and protection of face of slope of shallow water region |
| CN102301847A (en) * | 2011-06-22 | 2012-01-04 | 中国矿业大学(北京) | Construction method for land arrangement of rolling ground by topsoil stripping and backfilling |
| CN106801424A (en) * | 2017-01-18 | 2017-06-06 | 杭州天顺市政园林工程有限公司 | A kind of cofferdam construction method |
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Application publication date: 20200204 |