CN114775620B - Construction method for progressive excavation of plain riverbank under mucky soil condition - Google Patents
Construction method for progressive excavation of plain riverbank under mucky soil condition Download PDFInfo
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- CN114775620B CN114775620B CN202210510812.5A CN202210510812A CN114775620B CN 114775620 B CN114775620 B CN 114775620B CN 202210510812 A CN202210510812 A CN 202210510812A CN 114775620 B CN114775620 B CN 114775620B
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Hydrology & Water Resources (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Sewage (AREA)
Abstract
The invention discloses a construction method for progressively excavating a plain riverbank under the condition of mucky soil, which comprises the following steps: driving a circle of continuous stirring piles at the dam foundation; dividing a reservoir into four large areas, and excavating main drainage ditches on two sides of a main road; paving a temporary construction road by utilizing the surface layer residue soil of the basin area, compacting the road surface, and excavating a secondary drainage ditch outside the temporary construction road; dividing each small area into a plurality of strip areas, and excavating strips from the small area at the outermost side of each large area; after the excavation of the outermost strips is completed, the next small area strip is excavated, and the excavation is sequentially carried out to the center of the basin; and excavating temporary construction roads and main roads. According to the invention, the surrounding is excavated to the center in a progressive type and subarea manner, and the solidification of the non-excavated mucky soil is beneficial to the excavation construction of the central area by a construction vehicle and manual work. And the construction method of running water construction is adopted, so that the construction period can be shortened effectively.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a construction method for progressively excavating a plain riverbank under the condition of mucky soil.
Background
In the aspect of physical characteristics, the silt soft soil has the characteristics of high natural water content, high pore proportion, high compressibility, low permeability and low load strength, and has the characteristics of large thixotropic property, rheological property, non-uniformity, low water permeability and the like in the aspect of engineering construction.
In the process of excavation of a plain river bank basin, the construction problem caused by mucky soil is particularly serious, and the construction progress, vibration, pit top stacking, soil weight gain after rain, high underground water level of the river and the like are external factors with great influence on the construction of a mucky soft soil foundation.
The above-mentioned difficulties are caused by the excavation of the plain riverbank. Conventional earth excavation methods cannot be adopted. And the conventional earth excavation causes soil disturbance, so that a construction vehicle runs unsmoothly, and even construction equipment is damaged. The treatment of the mucky soil foundation should be based on the physical and mechanical properties of the mucky soil. The depth of the buried layer, the height of the embankment and the condition of the material field are treated by adopting measures such as soil replacement, stone throwing and dredging, back pressure protecting channel, water seepage, construction material feeding, plastic drainage plates, powder spraying piles, gravel piles, overload pre-pressing and the like. However, these operations are very complicated, difficult to construct, costly and time-consuming.
Disclosure of Invention
The invention aims to provide a construction method for progressively excavating a plain river basin under the condition of mucky soil, so as to solve the technical problems of complex operation, difficult construction, higher cost and long time consumption of the existing method for excavating earthwork in the mucky soil foundation.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a construction method for progressive excavation of plain riverbank under a muddy soil condition, the method comprising the following steps:
step 2, dividing the whole basin into a plurality of large areas, enabling each large area to be adjacent to a basin area trunk road, and digging main drainage ditches on two sides of the basin area trunk road;
step 4, after the temporary construction road is laid in half, excavating secondary drainage ditches from inside to outside at the outer side of the temporary construction road, and at the road intersection, enabling the primary drainage ditches and the secondary drainage ditches to penetrate through in a manner of burying pipes below, wherein adjacent secondary drainage ditches are communicated and finally communicated with the primary drainage ditches;
and 7, excavating the temporary construction road and the main road, and excavating the temporary construction road and the main road.
The above construction method for progressive excavation of plain riverbank under the condition of mucky soil, wherein the step 6 further comprises:
step 601, excavating strips in the outermost small area, and reserving a temporary construction road in the excavating process;
step 602, after the excavation of the strip of the small area is completed, excavating a temporary construction road at the strip.
According to the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, two crossed main roads are arranged in the riverbank area, and the main road in the riverbank area divides the whole riverbank into four large areas.
According to the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the closed loop is triangular, and the central triangular closed loop takes the main road as the bottom edge.
According to the construction method for the progressive excavation of the plain temporary riverbank under the condition of the mucky soil, the distance between adjacent temporary construction roads is 50-70m.
According to the construction method for the progressive excavation of the plain riverbank under the condition of the mucky soil, the vertexes of the closed-loop triangle are sequentially communicated through the temporary construction road from inside to outside. Alternatively, the side of the inner closed-loop triangle is vertically connected to the other side of the adjacent closed-loop triangle.
The construction method for progressively excavating the plain riverbank basin under the condition of the mucky soil further comprises water collecting wells, 1-3 water collecting wells are dug in each secondary drainage ditch, overflows to the secondary drainage ditches after water is full, and surrounding of the water collecting wells is protected and warning marks are set up.
According to the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the main drainage ditch is discharged through the drainage outlet.
According to the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the excavated soil is classified, the mucky soil is transported out for treatment, and the hard mucky soil is used for filling up the main drainage ditch, the secondary drainage ditch and the water collecting well.
According to the construction method for progressively excavating the plain river basin under the condition of the mucky soil, one side of the continuous stirring pile far away from the river is provided with a circle of main drainage ditch in a neighboring continuous stirring pile.
According to the construction method for the progressive excavation of the plain temporary river basin under the condition of the mucky soil, in the step 6, a secondary drainage ditch is reserved after the excavation of the outermost small area is completed, and the outermost primary drainage ditch and the inner secondary drainage ditch are communicated.
The construction method for progressively excavating plain riverbank under the condition of the mucky soil is applied to excavating mucky soil layers.
The beneficial effects of the invention are as follows: the construction method adopts a mode of excavating the muddy storehouse basin from outside to inside in a large area, a small area and a strip, and the non-excavated muddy soil is solidified, so that the construction vehicle and the manual work are facilitated to excavate the central area, and disturbance is not formed on the muddy soil basically; and a plurality of large areas are excavated simultaneously, and the problems of long construction period and inconvenient operation of construction machinery of the excavation of the silt geological reservoir basin are effectively solved by adopting the construction method of the running water construction.
Drawings
Fig. 1 is a schematic diagram of a construction flow of a construction method for progressive excavation of plain riverbank under a muddy soil condition.
Fig. 2 is a schematic diagram of steps 1 to 3.
Fig. 3 is a schematic diagram of selecting the region C for the outermost small region strip excavation.
Fig. 4 is a schematic view of the outermost small area of fig. 3 after excavation.
In the figure, 1, river; 2. continuously stirring the pile; 3. a main drain; 4. a main road; 5. temporarily constructing a road; 6. secondary drainage ditches; 7. a strap.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the embodiments of the present invention are not limited to the following examples.
Example 1
A construction method for progressive excavation of plain riverbank under a muddy soil condition, the method comprising the following steps:
step 2, dividing the whole basin into a plurality of large areas, enabling each large area to be adjacent to the basin area trunk road 4, and excavating main drainage ditches 3 at two sides of the basin area trunk road 4;
and 7, excavating the temporary construction road 5 and the main road 4, and excavating the temporary construction road 5 and the main road 4.
Example 2
Based on example 1, example 2 lists a number of new technical features, and example 1 may alternatively or additionally be combined with it, so as to form a number of new different technical solutions.
Further, the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, wherein the step 6 further comprises the following steps:
step 601, excavating a strip 7 in an area, and reserving a temporary construction road 5 in the excavating process;
step 602, after the excavation of the strip 7 of the area is completed, the excavation of the temporary construction road 5 at the strip 7 is performed.
Alternatively, in the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, two crossed main channels 4 are arranged in the riverbank area, and the main channels 4 divide the whole riverbank into four large areas.
Preferably, in the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the closed loop is triangular, and the central triangular closed loop takes the adjoining main road 4 as the bottom side.
Preferably, in the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the distance between adjacent temporary construction roads 5 is 50-70m.
Preferably, in the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the vertexes of the closed-loop triangle are sequentially communicated through the temporary construction road 5 from inside to outside. Alternatively, the side of the inner closed-loop triangle is vertically connected to the other side of the adjacent closed-loop triangle.
Further, in the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, in the step 6, a secondary drainage ditch 6 is reserved after the excavation of the outermost small area is completed, and the outermost primary drainage ditch 3 and the inner secondary drainage ditch 6 are communicated.
Further, the construction method for progressively excavating the plain river basin under the condition of the mucky soil further comprises water collecting wells, 1-3 water collecting wells are dug in each secondary drainage ditch 6, overflows to the secondary drainage ditches 6 after water is full, and is surrounded and provided with warning marks.
Further, according to the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the main drainage ditch 3 is discharged outside through the drainage outlet.
Further, according to the construction method for progressively excavating the plain riverbank under the condition of the mucky soil, the excavated soil is classified, the mucky soil is transported out for treatment, and the hard mucky soil is used for filling up the main drainage ditch 3, the secondary drainage ditch 6 and the collector well.
The construction method for progressively excavating the plain riverbank under the condition of the mucky soil is applied to excavating the mucky soil layer.
Example 3
A construction method for progressively excavating a plain riverbank under the condition of mucky soil, which comprises the following steps,
step 2, dividing the whole reservoir into A, B, C, D four large areas by taking two crossed main roads 4 as dividing lines, and excavating main drainage ditches 3 at two sides of the main road 4 in a basin area;
step 4, the area between adjacent temporary construction roads 5 is a small area, a plurality of strip-shaped strips 7 are divided into units of 60m width in each small area, strip excavation is carried out from the strip 7 of the outermost small area of each large area, and excavation of four large areas is carried out simultaneously;
and 6, excavating the temporary construction road 5 and the main road 4.
For the following: step 1, driving a circle of continuous stirring piles 2 along the peripheral dam feet in the basin to serve as a waterproof curtain;
1. floor cleaning
The farmland in the warehouse basin excavation area is densely distributed, mainly including sugarcane lands and banana lands, and the local areas are fish ponds and small rivers. The residential houses are basically gathered on both sides of the inland river, and the rest of the houses are scattered in the embankment. Before excavation, vegetation, construction waste and the like in the excavation area need to be cleaned, and conditions are created for the basin excavation engineering.
2. Driven continuous stirring pile
And a row of continuous stirring piles 2 are driven into the peripheral dam feet of the reservoir basin to form a waterproof curtain, so that groundwater is prevented from penetrating into the dam foundation, and consolidation of silt soil in the reservoir basin area during excavation is facilitated.
Step 2, dividing the whole reservoir into four large areas, and excavating main drainage ditches 3 at two sides of a main road 4 in a basin area;
1. a circle of main drainage ditches 3 are arranged 5m away from the dam foot line, and the section of the main drainage ditches 3 is 2m multiplied by 1.5m;
2. the main drain 3 is externally discharged by a river discharge opening.
3. The water collecting wells are arranged along the secondary drainage ditches 6, 1-2 water collecting wells are arranged near each secondary drainage ditch 6, and overflow to the secondary drainage ditches 6 after water is full. Meanwhile, in order to ensure safety, a movable iron horse is used around the water collecting well for enclosing and relevant warning marks are set up.
4. And pre-burying DN600 concrete pipes before constructing the temporary construction road 5 and the planned construction road crossing drainage ditch of the reservoir basin.
step 4, dividing each small area into a plurality of strip-shaped strips 7 in units of 60m width, excavating the strips 7 from the outermost small area of each large area, and simultaneously excavating four large areas:
excavating the strips 7 in the small area, and reserving temporary construction roads 5 of the strips 7 in the excavating process; after the excavation of the strip 7 of the area is completed, the excavation of the temporary construction road 5 at the strip 7 is performed.
after the soil consolidation of the excavation area of the outermost small area is completed, a construction vehicle enters a temporary construction road 5 of a basin area of a warehouse, and excavation of the next small area is carried out;
and excavating a temporary construction road 5 and a main road 4 to finish the excavation construction of the whole basin.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (10)
1. The construction method for progressively excavating plain riverbank under the condition of mucky soil is characterized by comprising the following steps:
step 1, driving a circle of continuous stirring piles along the peripheral dam feet in the basin to serve as a waterproof curtain;
step 2, dividing the whole basin into a plurality of large areas, enabling each large area to be adjacent to a basin area trunk road, and digging main drainage ditches on two sides of the basin area trunk road;
step 3, paving a temporary construction road by utilizing the surface layer residue soil of the basin area, compacting the road surface, excavating a secondary drainage ditch outside the temporary construction road, enabling the temporary construction road to pass through all large areas and form a closed loop, and paving the temporary construction road from the middle part of the basin to the outside so as to overcome the problem of less accumulated soil in the initial stage of construction, wherein adjacent temporary construction roads can be communicated;
step 4, after the temporary construction road is laid in half, excavating secondary drainage ditches from inside to outside at the outer side of the temporary construction road, and at the road intersection, enabling the primary drainage ditches and the secondary drainage ditches to penetrate through in a manner of burying pipes below, wherein adjacent secondary drainage ditches are communicated and finally communicated with the primary drainage ditches;
step 5, dividing each small area into a plurality of small strips, wherein one end of each small area is connected with the temporary construction road, the other end of each small area is connected with a secondary drainage ditch, the strips of the outermost small area of each large area are excavated, and the excavation of the strips of the outermost large area is simultaneously carried out;
step 6, after the excavation of the outermost small area is completed, the construction vehicle excavates the next small area through the temporary construction road, and sequentially and progressively excavates the small area to the center of the basin;
and 7, excavating the temporary construction road and the main road, and excavating the temporary construction road and the main road.
2. The method for progressively excavating a plain riverbank under a muddy soil condition according to claim 1, wherein said step 6 further comprises:
step 601, excavating strips in the outermost small area, and reserving a temporary construction road in the excavating process;
step 602, after the excavation of the strip of the small area is completed, excavating a temporary construction road at the strip.
3. The method for progressively excavating a plain riverbank under a muddy soil condition according to claim 1, wherein two intersecting main channels are provided in the riverbank zone, and the main channels divide the entire riverbank into four large areas.
4. The method for progressively excavating a plain riverbank under the condition of mucky soil according to claim 1, wherein the closed loop in the step 3 is triangular, and the central triangular closed loop takes a main road as a bottom side.
5. The construction method for progressively excavating plain riverbank under the condition of mucky soil according to claim 4, wherein the vertexes of the closed-loop triangle are sequentially communicated through temporary construction roads from inside to outside.
6. The method for progressively excavating a plain riverbank under a muddy soil condition according to claim 4, wherein the side of the inner closed-loop triangle is vertically connected with the other side of the adjacent closed-loop triangle.
7. The construction method for progressively excavating plain riverbank under the condition of mucky soil according to claim 1, further comprising water collecting wells, wherein 1-3 water collecting wells are excavated for each secondary drainage ditch, water overflows to the secondary drainage ditch after being filled with water, and surrounding of the water collecting wells is protected and warning marks are set up.
8. The method for progressively excavating a plain riverbank under a muddy soil condition according to claim 1, wherein a circle of main drainage ditches are dug by the continuous stirring piles on the side of the continuous stirring piles far from the river.
9. The method for progressively excavating a plain riverbank under a muddy soil condition according to claim 1, wherein in the step 6, a secondary drainage ditch is left after the excavation of the outermost small area is completed, and the outermost primary drainage ditch and the inner secondary drainage ditch are communicated.
10. A method of constructing a plain riverbank according to any one of claims 1 to 9, for use in the excavation of a layer of mucky soil.
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| CN202210510812.5A CN114775620B (en) | 2022-05-11 | 2022-05-11 | Construction method for progressive excavation of plain riverbank under mucky soil condition |
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| CN202210510812.5A CN114775620B (en) | 2022-05-11 | 2022-05-11 | Construction method for progressive excavation of plain riverbank under mucky soil condition |
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| CN114775620B true CN114775620B (en) | 2023-05-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748735A (en) * | 2009-12-11 | 2010-06-23 | 浙江海洋学院 | Foundation ditch excavation method for reducing pile deflection in soft soil area |
| CN104110038A (en) * | 2014-07-29 | 2014-10-22 | 上海市建工设计研究院有限公司 | Construction method for large-area pit support structure in deep-sludge type soft soil area |
| KR101568956B1 (en) * | 2015-02-13 | 2015-11-12 | 정제평 | Excavation method for sluice on soft ground using front h-pile with multi-wire |
| CN108457277A (en) * | 2018-03-01 | 2018-08-28 | 中国水利水电第十工程局有限公司 | A kind of a wide range of deep ＆ thick silt excavation construction method |
-
2022
- 2022-05-11 CN CN202210510812.5A patent/CN114775620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748735A (en) * | 2009-12-11 | 2010-06-23 | 浙江海洋学院 | Foundation ditch excavation method for reducing pile deflection in soft soil area |
| CN104110038A (en) * | 2014-07-29 | 2014-10-22 | 上海市建工设计研究院有限公司 | Construction method for large-area pit support structure in deep-sludge type soft soil area |
| KR101568956B1 (en) * | 2015-02-13 | 2015-11-12 | 정제평 | Excavation method for sluice on soft ground using front h-pile with multi-wire |
| CN108457277A (en) * | 2018-03-01 | 2018-08-28 | 中国水利水电第十工程局有限公司 | A kind of a wide range of deep ＆ thick silt excavation construction method |
Non-Patent Citations (1)
| Title |
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| 软土地区紧邻地铁站体超大深基坑"分仓法+盆式法+阶梯法"土方开挖技术;于峰等;《天津建设科技》;第26卷(第2期);第7-12页 * |
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