CN208949902U - A kind of river channel bridge bearing platform foundation pit antiseepage cofferdam - Google Patents

A kind of river channel bridge bearing platform foundation pit antiseepage cofferdam Download PDF

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Publication number
CN208949902U
CN208949902U CN201821456469.6U CN201821456469U CN208949902U CN 208949902 U CN208949902 U CN 208949902U CN 201821456469 U CN201821456469 U CN 201821456469U CN 208949902 U CN208949902 U CN 208949902U
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China
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cofferdam
antiseepage
foundation pit
bearing platform
cushion cap
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CN201821456469.6U
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Inventor
程飞
于兵
徐东方
蒋博
张书灿
李育庆
李雪涛
高小宝
梁许波
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Sinohydro Bureau 14 Co Ltd
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Sinohydro Bureau 14 Co Ltd
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Abstract

The utility model provides a kind of river channel bridge bearing platform foundation pit antiseepage cofferdam, belongs to highway engineering technical field, the river channel bridge bearing platform foundation pit antiseepage cofferdam includes cofferdam weir body, spats and antiseepage foundation trench.The utility model cofferdam structure is simple, small, easy for construction, and it is few to occupy riverbed.Antiseepage foundation trench is provided on the body of cofferdam weir, waterproof geotextiles are set along foundation trench periphery, centre uses clay backfilling, forms the seepage prevention system of " geotextiles+clay+geotextiles ", seepage prevention system compared to traditional " clay+geotextiles+clay " is easy for construction, and percolation-proof effect is more preferable.Moreover, cofferdam is arranged in cushion cap foundation pit side, as the one side wall of cushion cap foundation pit, when construction, which can be used, excavates the direct heap of native stone of cushion cap foundation pit and fills into cofferdam weir body, makes full use of the characteristic of riverbed cut and fill, gathers materials on the spot, construction cost is low.

Description

A kind of river channel bridge bearing platform foundation pit antiseepage cofferdam
Technical field
The utility model belongs to highway engineering technical field, specifically, it is anti-to be related to a kind of river channel bridge bearing platform foundation pit Seep cofferdam.
Background technique
Currently, for the bridge pier being located in riverbed, drawing is generally arranged in pile foundation and cushion cap foundation pit construction in highway engineering The cofferdam such as gloomy steel sheet pile, diaphram wall carry out cushion cap foundation pit construction, not only at high cost, and need professional equipment, and technique is more complex. Often construction period is shorter when especially for pile foundation or bearing platform construction, generally in 2~3 months, and existing technology, according to The construction of standard earth rock cofferdam then needs the long period, larger with desired duration gap, undoubtedly increases time cost again, and by The limitation of the landform such as riverbed, it is too many that weir body structure occupies riverbed, therefore, it is simple, easy for construction to design a kind of structure, and meet certain The river channel bridge bearing platform foundation pit cofferdam of flood control seepage resistance demand be very important.
Summary of the invention
In order to solve the problems, such as to propose in background technique, it is anti-that the utility model provides a kind of river channel bridge bearing platform foundation pit Cofferdam is seeped, structure is simple, anti-seepage effect is preferable, easy for construction.
It is as follows that the utility model solves technical solution used by its technical problem:
A kind of river channel bridge bearing platform foundation pit antiseepage cofferdam, including cofferdam weir body, spats and antiseepage foundation trench, the cofferdam Weir body is filled out by native clitter, is arranged in riverbed, and spats, cofferdam weir body middle part are provided at the body upstream face slope foot of cofferdam weir It is provided with antiseepage foundation trench, antiseepage foundation trench side wall is surrounded using waterproof geotextiles, clay is filled in antiseepage foundation trench lower space, on Filled with native stone in portion space.
Further, the side of the cushion cap foundation pit of bridge is arranged in the cofferdam weir body, total with other side walls of cushion cap foundation pit It is same to surround cushion cap foundation pit.
Further, the spats is made of reinforced gabion and block stone, and block stone is filled in reinforced gabion.
Further, 90~100cm of riverbed bottom is goed deep into the antiseepage foundation trench bottom.
Preferably, the antiseepage foundation trench is inverted trapezoidal structure, upper mouth width 2.5m, bottom width 1m.
The utility model has the beneficial effects that
The utility model cofferdam structure is simple, small, easy for construction, and it is few to occupy riverbed.It is provided on the body of cofferdam weir anti- Foundation trench is seeped, waterproof geotextiles are set along foundation trench periphery, centre uses clay backfilling, forms " geotextiles+clay+geotextiles " Seepage prevention system, the seepage prevention system compared to traditional " clay+geotextiles+clay " is easy for construction, and percolation-proof effect is more preferable.Moreover, Cofferdam is arranged in cushion cap foundation pit side, as the one side wall of cushion cap foundation pit, when construction can be used excavate cushion cap foundation pit native stone it is straight It connects heap and fills into cofferdam weir body, make full use of the characteristic of riverbed cut and fill, gather materials on the spot, construction cost is low.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model;
In figure, the riverbed 1-, the cofferdam 2- weir body, 3- spats, 4- antiseepage foundation trench, 5- clay, 6- soil stone, 7- cushion cap, 8- cushion cap Foundation pit, 9- seepage prevention of cofferdam operation platform, 10- reinforced gabion, 11- block stone.
Specific embodiment
The technical solution of the utility model is described in further detail below with reference to embodiment and attached drawing.
As shown in Figure 1, a kind of 6 antiseepage cofferdam of river channel bridge bearing platform foundation pit, including cofferdam weir body 2, spats 3 and antiseepage base Slot 4, the cofferdam weir body 2 are formed by native 6 landfill of stone, are arranged in riverbed 1, be arranged at 2 upstream face slope foot of cofferdam weir body There is spats 3, antiseepage foundation trench 4 is provided in the middle part of cofferdam weir body 2,4 side wall of antiseepage foundation trench is surrounded using waterproof geotextiles, antiseepage foundation trench It is filled with clay 5 in 4 lower spaces, native stone 6 is filled in upper space, body 2 top width in cofferdam weir is set as 3m, and it is logical to meet vehicle Line width requirement.When construction, 2 height of cofferdam weir body and cushion cap foundation pit 8 are determined according to rivers hydrological data and 7 bottom surface elevation of cushion cap Bottom is high, and the height of a height of 7 bottom surface bed course of cushion cap in 8 bottom of cushion cap foundation pit determines cushion cap according to the height and 2 top width of cofferdam weir body in this way The distance of 7 sides to cofferdam weir body, 2 outer ledge.Then it excavates cofferdam construction platform height above section using backhoe and synchronizes and adopt It is backfilled to 2 edge of cofferdam weir body with the method for attacking and occupying, then insufficient slag charge outward transport supplement excavates antiseepage foundation trench 4, antiseepage foundation trench 4 excavates In the process using the continuous productive process for being laid with waterproof geotechnique's selvedge backfill clay 5 when excavating.It is flat finally to carry out seepage prevention of cofferdam construction 9 or less part cushion cap foundation pit 8 of platform excavates, and is filled using the synchronous native stone 6 of remaining cofferdam weir body 2 that carries out of slag charge is excavated, most end form At cushion cap foundation pit 8, specified cinder field is transported to outside the extra slag charge of excavation of foundation pit.Cofferdam upstream face and the back side gradient are disposed as 1:1, For the limiting gradient of stable side slope, it is convenient for reducing weir body figure.The utility model cofferdam structure is simple, small, easy for construction, It is few to occupy riverbed 1.It is provided with antiseepage foundation trench 4 on cofferdam weir body 2, waterproof geotextiles are set along foundation trench periphery, centre uses clay 5 Backfill, forms the seepage prevention system of " geotextiles+clay 5+ geotextiles ", anti-compared to traditional " clay 5+ geotextiles+clay 5 " Infiltration system is easy for construction, and percolation-proof effect is more preferable.Moreover, cofferdam is arranged in 8 side of cushion cap foundation pit, as cushion cap foundation pit 8 One side wall, when construction, which can be used, excavates the direct heap of native stone 6 of cushion cap foundation pit 8 and fills into cofferdam weir body 2, and riverbed 1 half is made full use of to dig The characteristic partly filled out, gathers materials on the spot, and construction cost is low.
The side of the cushion cap foundation pit 8 of bridge is arranged in the cofferdam weir body 2, other side walls enclose jointly with cushion cap foundation pit 8 At cushion cap foundation pit 8, when construction, cofferdam is arranged in 8 side of cushion cap foundation pit, and as the one side wall of cushion cap foundation pit 8, when construction be can be used The direct heap of native stone 6 for excavating cushion cap foundation pit 8 fills into cofferdam weir body 2, makes full use of the characteristic of 1 cut and fill of riverbed, gathers materials on the spot, Construction cost is low.
The spats 3 is made of reinforced gabion 10 and block stone 11, and block stone 11 is filled in reinforced gabion 10, energy Enough effective protection cofferdam weir bodies 2, avoid body 2 long-time in cofferdam weir from being washed away and collapsed by river water, have good anti-impact brushing effects.
1 90~100cm of bottom of riverbed is goed deep into 4 bottom of antiseepage foundation trench, and body 2 bottom in cofferdam weir is avoided to seep water, described Antiseepage foundation trench 4 be inverted trapezoidal structure, upper mouth width 2.5m, bottom width 1m are applicable in large scale equipment and directly carry out slot digging, and can when construction It is convenient, fast for construction using the continuous productive process for being laid with waterproof geotechnique's selvedge backfill clay 5 when excavating.
The heap of the utility model builds process:
When construction, 2 height of cofferdam weir body and 8 bottom of cushion cap foundation pit are determined according to rivers hydrological data and 7 bottom surface elevation of cushion cap Height, the height of a height of 7 bottom surface bed course of cushion cap in 8 bottom of cushion cap foundation pit, determines cushion cap 7 according to the height and 2 top width of cofferdam weir body in this way While to the distance of 2 outer ledge of cofferdam weir body.Then it excavates cofferdam construction platform height above section using backhoe and synchronizes and adopt It is backfilled to 2 edge of cofferdam weir body with the method for attacking and occupying, then insufficient slag charge outward transport supplement excavates antiseepage foundation trench 4, antiseepage foundation trench 4 excavates In the process using the continuous productive process for being laid with waterproof geotechnique's selvedge backfill clay 5 when excavating.It is flat finally to carry out seepage prevention of cofferdam construction 9 or less part cushion cap foundation pit 8 of platform excavates, and is filled using the synchronous native stone 6 of remaining cofferdam weir body 2 that carries out of slag charge is excavated, most end form At cushion cap foundation pit 8, specified cinder field is transported to outside the extra slag charge of excavation of foundation pit.
Finally, it is stated that preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage Solution, can make various changes, without departing from the utility model claims book institute to it in the form and details The range of restriction.

Claims (5)

1. a kind of river channel bridge bearing platform foundation pit antiseepage cofferdam, it is characterised in that: the river channel bridge bearing platform foundation pit antiseepage Cofferdam includes cofferdam weir body, spats and antiseepage foundation trench, and the cofferdam weir body is filled out by native clitter, is arranged in riverbed, It is provided with spats at the body upstream face slope foot of cofferdam weir, antiseepage foundation trench is provided in the middle part of the body of cofferdam weir, antiseepage foundation trench side wall is using anti- Water geotextiles surround, and clay is filled in antiseepage foundation trench lower space, native stone is filled in upper space.
2. a kind of river channel bridge bearing platform foundation pit antiseepage cofferdam according to claim 1, it is characterised in that: the cofferdam The side of the cushion cap foundation pit of bridge is arranged in weir body, other side walls surround cushion cap foundation pit jointly with cushion cap foundation pit.
3. a kind of river channel bridge bearing platform foundation pit antiseepage cofferdam according to claim 1, it is characterised in that: described is described Spats be made of reinforced gabion and block stone, block stone is filled in reinforced gabion.
4. a kind of river channel bridge bearing platform foundation pit antiseepage cofferdam according to claim 1, it is characterised in that: the antiseepage 90~100cm of riverbed bottom is goed deep into foundation trench bottom.
5. a kind of river channel bridge bearing platform foundation pit antiseepage cofferdam according to claim 1 or 4, it is characterised in that: described Antiseepage foundation trench is inverted trapezoidal structure, upper mouth width 2.5m, bottom width 1m.
CN201821456469.6U 2018-09-06 2018-09-06 A kind of river channel bridge bearing platform foundation pit antiseepage cofferdam Active CN208949902U (en)

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CN201821456469.6U CN208949902U (en) 2018-09-06 2018-09-06 A kind of river channel bridge bearing platform foundation pit antiseepage cofferdam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821456469.6U CN208949902U (en) 2018-09-06 2018-09-06 A kind of river channel bridge bearing platform foundation pit antiseepage cofferdam

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111364487A (en) * 2020-03-19 2020-07-03 中铁隧道局集团有限公司 Low-water-level combined cofferdam and construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111364487A (en) * 2020-03-19 2020-07-03 中铁隧道局集团有限公司 Low-water-level combined cofferdam and construction method

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