CN220450894U - Sinking-assisting slurry plugging structure of open caisson - Google Patents
Sinking-assisting slurry plugging structure of open caisson Download PDFInfo
- Publication number
- CN220450894U CN220450894U CN202321887549.8U CN202321887549U CN220450894U CN 220450894 U CN220450894 U CN 220450894U CN 202321887549 U CN202321887549 U CN 202321887549U CN 220450894 U CN220450894 U CN 220450894U
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- rubber plate
- open caisson
- annular
- connecting ring
- annular rubber
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- 239000002002 slurry Substances 0.000 title claims abstract description 26
- 239000002689 soil Substances 0.000 claims abstract description 29
- 239000004576 sand Substances 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 238000010276 construction Methods 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Revetment (AREA)
Abstract
The utility model discloses a sunk well slurry plugging structure, which is characterized in that the sunk well is provided with a cylindrical well wall, an annular cavity is formed between the well wall and surrounding soil, slurry or fine sand is injected into the annular cavity in construction of the sunk well to reduce friction between the sunk well and the surrounding soil, the bottom end of the well wall is fixedly connected with a hard connecting ring, the connecting ring is connected with an annular rubber plate, and the outer diameter of the annular rubber plate is larger than the inner diameter of the annular cavity. The connecting ring is a steel ring, and a plurality of connecting bolts are connected to the connecting ring along the circumferential direction; the radial inner end of the annular rubber plate is pressed between the connecting ring and the bottom end of the well wall, and the connecting bolt penetrates through the connecting ring and the radial inner end of the annular rubber plate and is connected with the bottom end of the well wall. By adopting the structure of the utility model, the annular rubber plate can prevent most slurry or fine sand above the annular rubber plate from falling, so that the problem that the friction force between the open caisson and soil is increased after the substances for reducing friction force are lost, thereby reducing the sinking assisting effect and avoiding inconvenience to operators in the open caisson.
Description
Technical Field
The utility model relates to the technical field of construction, in particular to a sunk well construction technology.
Background
In open caisson construction, a phenomenon of difficulty in sinking may occur in the middle stage of sinking of the open caisson. The reason is that the contact area between the well wall of the open caisson and the soil body gradually increases along with the sinking of the open caisson, the lateral restraining force of the soil body and the increased contact area jointly increase the friction force between the open caisson and the surrounding soil body, and the phenomenon of sinking difficulty is caused when the friction force exceeds the dead weight of the open caisson.
The existing sinking assisting measures are a grouting method or a sand grouting method, namely slurry or fine sand is injected into an annular cavity between the well wall of the open caisson and the soil body, so that the well wall of the open caisson is not in direct contact with the soil body, and friction resistance is reduced through the slurry or the fine sand, so that the sinking assisting effect is achieved. The slurry may be water, thixotropic slurry, or the like.
The existing sinking assisting measures have shortcomings in construction.
In open caisson construction, the well wall of the open caisson encloses an inner cavity, and soil below the open caisson needs to be dug out in the inner cavity of the open caisson so that the open caisson further sinks. When the soil body below the sinking well is dug out, the slurry or sand in the annular cavity can fall down faster than the sinking well, so that the slurry or fine sand in the annular cavity is reduced, the friction force is increased, and the sinking assisting effect is reduced; the slurry or sand which falls down firstly is surrounded in the inner cavity of the open caisson by the open caisson after the open caisson falls down, and the operation of workers in the inner cavity of the open caisson is also affected.
Therefore, it is necessary to design a construction structure capable of preventing a large amount of slurry (or sand) from entering the inner cavity of the open caisson.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and designs a sinking-assisting slurry plugging structure for a sunk well, which can prevent a large amount of slurry from entering an inner cavity of the sunk well when the sunk well falls.
In order to achieve the purpose, the utility model provides the sunk well slurry plugging structure, which is provided with a cylindrical well wall, wherein an annular cavity is formed between the well wall and surrounding soil, slurry or fine sand is injected into the annular cavity in the construction of the sunk well to reduce friction force between the sunk well and the surrounding soil, the bottom end of the well wall is fixedly connected with a hard connecting ring, the connecting ring is connected with an annular rubber plate, and the outer diameter of the annular rubber plate is larger than the inner diameter of the annular cavity.
The connecting ring is a steel ring, a plurality of connecting bolts are connected to the connecting ring along the circumferential direction, and the connecting bolts are uniformly distributed along the circumferential direction; the radial inner end part of the annular rubber plate is pressed between the connecting ring and the bottom end of the well wall, and the connecting bolt penetrates through the connecting ring and the radial inner end part of the annular rubber plate from bottom to top and is connected with the bottom end of the well wall.
The annular rubber plate is composed of a plurality of annular sections which are arranged along the circumferential direction, and each annular section is connected to the connecting ring respectively.
The utility model has the following advantages:
by adopting the structure of the utility model, the annular rubber plate can prevent most slurry or fine sand above the annular rubber plate from falling, prevent a large amount of slurry or fine sand from falling before the open caisson and finally being covered in the open caisson after the open caisson falls, avoid reducing the sinking assisting effect (the friction force between the open caisson and the soil body is increased after the substances for reducing the friction force are lost), and avoid causing inconvenience to the operators in the open caisson.
The connecting ring and the annular rubber plate are fixedly connected with the bottom end of the well wall through bolts, so that the connecting ring is convenient to install and use, and the requirement of firmly positioning the radial inner end of the annular rubber plate in the sinking process is effectively met.
The annular rubber plate is formed by a plurality of annular sections which are arranged along the circumferential direction, so that when the soil body above any one annular section falls down, the corresponding annular section can return to the horizontal state under the action of self-elasticity, thereby bearing the soil body above, and avoiding the problem that when the annular rubber plate is of an integral annular structure, the local soil body falls down and the whole annular rubber plate cannot return to the horizontal state, thereby bearing more soil bodies above.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is a bottom view of the attachment ring and annular rubber plate.
Detailed Description
As shown in fig. 1 to 3, the utility model provides a sunk well slurry plugging structure, which is characterized in that a cylindrical well wall 1 is arranged in the sunk well, an annular cavity 2 is formed between the well wall 1 and surrounding soil bodies 6, slurry or fine sand is injected into the annular cavity 2 in construction of the sunk well to reduce friction force between the sunk well and the surrounding soil bodies 6, the bottom end of the well wall 1 is fixedly connected with a hard connecting ring 3, the connecting ring 3 is connected with an annular rubber plate 4 or a steel plate, and when the annular rubber plate 4 is adopted, the outer diameter of the annular rubber plate 4 is larger than the inner diameter of the annular cavity 2. The combined structure of the connection ring 3 and the annular rubber plate 4 is referred to as a blocking member 5. The annular rubber plate 4 is at least 1 cm thick. When a steel plate is used, the outer diameter of the steel plate is smaller than the inner diameter of the annular cavity 2 by 1 to 2 mm (including both ends). When a steel plate is adopted, the steel plate is of an annular horizontal structure, and the steel plate is not shown in the figure.
The ring-shaped rubber plate 4 is adopted under the condition of good self-stability of the soil at the construction site. The self-stability of the soil at the construction site is poor, such as sandy soil, in which case steel plates are used.
By adopting the structure of the utility model, the plugging piece 5 can prevent most slurry or fine sand above the plugging piece from falling, prevent a large amount of slurry or fine sand from falling before the open caisson and finally being covered in the open caisson after the open caisson falls, avoid reducing the sinking effect (the friction force between the open caisson and the soil body 6 is increased after the substances for reducing the friction force are lost) and avoid causing inconvenience to operators in the open caisson.
The connecting ring 3 is a steel ring, the connecting ring 3 is connected with a plurality of connecting bolts 7 along the circumferential direction, and the connecting bolts 7 are uniformly distributed along the circumferential direction; the radial inner end part of the annular rubber plate 4 is pressed between the connecting ring 3 and the bottom end of the well wall 1, and the connecting bolt 7 passes through the connecting ring 3 and the radial inner end part of the annular rubber plate 4 from bottom to top and is connected with the bottom end of the well wall 1.
The connecting ring 3 and the annular rubber plate 4 are fixedly connected with the bottom end of the well wall 1 through bolts, so that the installation and the use are convenient, and the requirement of firmly positioning the radial inner end part of the annular rubber plate 4 in the sinking process is effectively met.
With the structure of the utility model, the radial inner end of the annular rubber plate 4 is fixed at the bottom end of the well wall 1. In the process of placing the open caisson into the cavity dug in the soil body 6, since the outer diameter of the annular rubber plate 4 is larger than the inner diameter of the annular cavity 2, the outer end part of the annular rubber plate 4 is bent upwards (restrained by the side wall of the soil body 6 to be upwards flipped) and is in compression joint with the inner wall of the annular cavity 2 (the annular rubber plate 4 can be compressed against the inner wall of the annular cavity 2 under the action of self elasticity), so that the slurry or fine sand in the annular cavity 2 is blocked from flowing downwards. In open caisson construction, dig the soil body 6 below the open caisson in the inner chamber of the open caisson, when making the open caisson further sink, most thick liquid or fine sand in the annular cavity 2 is blocked by the annular rubber plate 4 and can not fall before the open caisson, can not spread at the bottom before the open caisson falls in place, thus can not get into the open caisson in a large amount after the open caisson falls to the bottom (downwards contacts with soil body 6), avoid causing negative effects to construction.
The above embodiments are only for illustrating the technical solution of the present utility model, and it should be understood by those skilled in the art that although the present utility model has been described in detail with reference to the above embodiments: modifications and equivalents may be made thereto without departing from the spirit and scope of the utility model, which is intended to be encompassed by the claims.
Claims (3)
1. The utility model provides an open caisson helps heavy thick liquid shutoff structure, the open caisson has cylindric wall of a well, encloses into annular cavity between wall of a well and the surrounding soil body, pours into thick liquid or fine sand into in annular cavity in the open caisson construction in order to reduce the frictional force between open caisson and the surrounding soil body, its characterized in that: the bottom end of the well wall is fixedly connected with a hard connecting ring, the connecting ring is connected with an annular rubber plate or a steel plate, and when the annular rubber plate is adopted, the outer diameter of the annular rubber plate is larger than the inner diameter of the annular cavity; when the steel plate is adopted, the inner diameter of the steel plate is smaller than the inner diameter of the annular cavity.
2. The open caisson sinking slurry plugging structure according to claim 1, wherein: the connecting ring is a steel ring, a plurality of connecting bolts are connected to the connecting ring along the circumferential direction, and the connecting bolts are uniformly distributed along the circumferential direction; the radial inner end part of the annular rubber plate is pressed between the connecting ring and the bottom end of the well wall, and the connecting bolt penetrates through the connecting ring and the radial inner end part of the annular rubber plate from bottom to top and is connected with the bottom end of the well wall.
3. The open caisson sinking slurry plugging structure according to claim 1, wherein: the annular rubber plate is composed of a plurality of annular sections which are arranged along the circumferential direction, and each annular section is connected to the connecting ring respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321887549.8U CN220450894U (en) | 2023-07-18 | 2023-07-18 | Sinking-assisting slurry plugging structure of open caisson |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321887549.8U CN220450894U (en) | 2023-07-18 | 2023-07-18 | Sinking-assisting slurry plugging structure of open caisson |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220450894U true CN220450894U (en) | 2024-02-06 |
Family
ID=89735653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321887549.8U Active CN220450894U (en) | 2023-07-18 | 2023-07-18 | Sinking-assisting slurry plugging structure of open caisson |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220450894U (en) |
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2023
- 2023-07-18 CN CN202321887549.8U patent/CN220450894U/en active Active
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