CN213233510U - Simple combined steel plate cofferdam structure for preventing and treating quicksand - Google Patents

Simple combined steel plate cofferdam structure for preventing and treating quicksand Download PDF

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Publication number
CN213233510U
CN213233510U CN202021233784.XU CN202021233784U CN213233510U CN 213233510 U CN213233510 U CN 213233510U CN 202021233784 U CN202021233784 U CN 202021233784U CN 213233510 U CN213233510 U CN 213233510U
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China
Prior art keywords
gabion
steel plate
cofferdam
steel sheet
quicksand
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CN202021233784.XU
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Chinese (zh)
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王华震
张志青
宋龙飞
史静静
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Sinohydro Bureau 11 Co Ltd
PowerChina 11th Bureau Engineering Co Ltd
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Sinohydro Bureau 11 Co Ltd
PowerChina 11th Bureau Engineering Co Ltd
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Abstract

The utility model provides a simple and easy combination steel sheet cofferdam structure of prevention and cure quicksand, including steel sheet frame, check guest gabion, geotechnological cloth and building stones, the steel sheet frame includes that four side steel sheets surround the rectangle framework that constitutes, and two adjacent steel sheet welded fastening are provided with the lewis hole on each steel sheet, geotechnological cloth lays in the bottom of steel sheet frame, the regular range of check guest gabion is filled up the steel sheet frame, the layering fills up the building stones in the check guest gabion cofferdam. The simple combined steel plate cofferdam structure for preventing the floating sand can be quickly constructed on a construction site, the steel plate frame can be repeatedly utilized, the construction period is greatly shortened, and the investment cost is lower.

Description

Simple combined steel plate cofferdam structure for preventing and treating quicksand
Technical Field
The utility model relates to a quicksand prevention and cure field, specific theory has related to a simple and easy combination steel sheet cofferdam structure of prevention and cure quicksand.
Background
Because the stratum at the position where the slope protection is constructed along the river course in the river course treatment is mostly pure sand soil or silt soil, the soil quality and liquid limit of the excavated position is low, the underground water is well developed, and quicksand is easily formed. The measures for preventing and treating the quicksand commonly used in the construction at home and abroad are as follows:
(1) well point drainage method
The method requires uninterrupted pumping before and during excavation of the foundation pit, and the foundation pit is prevented from being flooded due to power failure. If the predictability is poor, the construction period can be delayed by using well point drainage to remedy after the flowing sand occurs.
(2) Steel sheet pile cofferdam method
The steel plate sheet pile is driven into the unearthed foundation to increase the permeation path of underground water, reduce the hydraulic gradient, prevent the pit wall from collapsing and prevent quicksand from entering the foundation pit. The steel sheet pile has high strength and is easy to be driven into a hard soil layer; the construction can be carried out in deep water, and an inclined support is added to form a surrounding cage when necessary, so that the waterproof performance is good; the cofferdam with various shapes can be formed according to the requirement and can be repeatedly used, so that the cofferdam has wide application. However, for the construction of the linear river channel, the defects of high price, low speed and the like exist, and the current situations of short construction period and heavy construction task cannot be met.
(3) Earth excavation method
The method for enlarging the section is adopted, the excavation size is enlarged, the excavation amount is increased, and the construction progress is very slow.
Disclosure of Invention
The utility model aims at the not enough of prior art to a simple and easy combination steel sheet cofferdam structure of prevention and cure quicksand that can be under construction fast, strong adaptability, practice thrift the cost is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: the utility model provides a simple and easy combination steel sheet cofferdam structure of prevention and cure quicksand, includes steel sheet frame, check guest gabion, geotechnological cloth and building stones, the steel sheet frame includes that four sides steel sheets surround the rectangle framework that constitutes, and two adjacent steel sheet welded fastening are provided with the lewis hole on each steel sheet, geotechnological cloth lays in the bottom of steel sheet frame, the regular range of check guest gabion is filled up the steel sheet frame, the layering is filled up cofferdam building stones in the check guest gabion.
Basically, the gabion is of a single-row multi-partition integral structure, and the size of the gabion is equal to the inner size of the steel plate frame.
On the basis, the gabion is of a multi-row structure, and a plurality of partition walls formed by partition gabion nets are arranged inside the gabion.
Basically, the gabion is of an independent square frame structure.
On the basis, the aperture of the bottom and the side of the gabion is not larger than the diameter of the stone material.
Basically, the top of the gabion is open.
Basically, the aperture of the top of the gabion is larger than that of the stone.
The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model discloses a steel sheet frame, check guest gabion and the geotechnological cloth of simply assembling into the cofferdam form cooperate, be under construction fast in the slope basement dug, just can accomplish laying of cofferdam before the water level rises, then wait for the water level to rise, drift sand all around gathers together to the cofferdam, naturally with the cofferdam compaction, the in-process of waiting for, can get rid of the steel sheet frame, reuse, also can remain the steel sheet frame, increase the intensity of cofferdam, bring forward the forming process in cofferdam, avoid the influence of drift sand to cofferdam work, and gather together the back at the drift sand, can play the effect of strengthening the cofferdam again.
In order to improve the strength of the cofferdam and adapt to different working condition environments, the gabion is arranged in a diversified mode.
In order to meet the stability requirement, the top of the cofferdam can be divided into an open form and a non-open form, the open form is used for the cofferdam environment with relatively low stability requirement and relatively high speed, and the non-open form is used for the cofferdam environment with relatively high stability requirement and relatively low speed.
Drawings
Fig. 1 is a schematic view of the sectional structure of the simple combined steel plate cofferdam structure for preventing and treating the floating sand in the utility model.
Fig. 2 is a top view of the simple combined steel plate cofferdam structure for preventing and controlling sand drift of the utility model.
Fig. 3 is the structure schematic diagram of the middle steel plate frame of the utility model.
In the figure: 1. a steel plate frame; 2. gabion gabions; 3. geotextile; 4. stone material; 5. and (4) hoisting holes.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
As shown in fig. 1-3, a simple combined steel plate cofferdam structure for preventing and treating quicksand, includes steel sheet frame 1, gabion 2, geotechnological cloth 3 and building stones 4, steel sheet frame 1 includes the rectangle framework that four sides steel sheet surround and constitute, and two adjacent steel sheet welded fastening are provided with lewis hole 5 on each steel sheet to make things convenient for the transport of crane, geotechnological cloth 3 lays in the bottom of steel sheet frame 1, and the purpose takes place in order to prevent the condition of flexible material later stage subsidence, gabion 2 regular range is filled up steel sheet frame 1, the interior layering of gabion is filled up cofferdam building stones. The gabion is of an integral structure with a single row and multiple partitions, so that the situation that building stones are too loose to cause poor gathering in the filling process is avoided, and the size of the gabion is equal to the inner size of the steel plate frame. The bottom and the lateral aperture of the gabion are not larger than the diameter of the stone, the stone is prevented from flowing out from the side in the stacking process, and the aperture of the top of the gabion 2 is larger than that of the stone 4, so that the stone 4 can enter the gabion 2.
In other embodiments, in order to meet different cofferdam requirements, the gabion can be designed into a multi-row structure to meet a wider cofferdam, and partition walls formed by a plurality of partition gabion nets are arranged inside the gabion. The gabion is an independent square frame structure so as to deal with a more complex cofferdam structure, such as a special-shaped or angled cofferdam structure. For faster filling of the rock material, the gabion is open at the top.
The construction process comprises the following steps: during the excavation process, a measurer needs to measure whether the excavation elevation is in place in time so that the micro cofferdam can be paved most quickly after the excavation of the slope substrate is in place, geotextile is paved firstly within 20 minutes of the excavation of a foundation trench and temporary water shortage, then prepared steel plate frames and gabion cages are sequentially placed on the base surface of a geotextile component, if the base surface is large, a plurality of steel plate frames can be adopted for filling, then stone placing work is immediately carried out, before the water level rises, the stone is divided into placing parts for completing placing, then the water seepage is clearly arranged on the outer side of the gabion cage, whether the steel plate frames are lifted or not is selected, after the work is completed, the quicksand on the two sides basically extrudes and compacts the two sides of the gabion cage 2, if the gabion cage on at a certain position deforms, the gabion cage can be trimmed to meet the requirement, and the sealing is carried out according to the requirement after the design elevation is reached, the construction quality is ensured.
The cofferdam structure effectively solves the construction technical problem of a strong quicksand stratum in river course slope protection construction, not only meets the quality requirement, but also solves the problem of short construction period of the project under the conditions of tight construction period and small investment, reduces the investment of other high-cost treatment methods, and obtains effective economic and social benefits.
In a river course full-line 9.6km long project, the device is adopted, the construction period is shortened by 50 days, and the cost of precipitation is saved by 40 ten thousand yuan. The construction technology of the cofferdam structure in the drift sand prevention geology obtains good effect in the application process, solves the field problem in time, and provides conditions for subsequent construction.
Finally, it should be noted that the above-mentioned embodiments illustrate only some of the embodiments of the invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides a simple and easy combination steel sheet cofferdam structure of prevention and cure quicksand which characterized in that: the cofferdam stone material comprises a steel plate frame, gabion stones, geotextile and stone materials, wherein the steel plate frame comprises a rectangular frame body formed by surrounding four steel plates, two adjacent steel plates are welded and fixed, lifting holes are formed in the steel plates, the geotextile is laid at the bottom of the steel plate frame, the gabion stones are regularly arranged and filled in the steel plate frame, and the cofferdam stone materials are filled in the gabion stones in layers.
2. The simple combined steel plate cofferdam structure for preventing and treating quicksand of claim 1, wherein: the gabion is of an integral structure with a single row and multiple partitions, and the size of the gabion is equal to the inner size of the steel plate frame.
3. The simple combined steel plate cofferdam structure for preventing and treating quicksand of claim 1, wherein: the gabion is of a multi-row structure, and a plurality of partition walls formed by partition gabion nets are arranged inside the gabion.
4. The simple combined steel plate cofferdam structure for preventing and treating quicksand of claim 1, wherein: the gabion is of an independent square frame structure.
5. The simple combined steel plate cofferdam structure for preventing and treating quicksand of claim 1, wherein: the aperture of the bottom and the side of the gabion is less than or equal to the diameter of the stone.
6. The simple combined steel plate cofferdam structure for controlling the quicksand of any one of claims 1 to 5, wherein: the top of the gabion is open.
7. The simple combined steel plate cofferdam structure for controlling the quicksand of any one of claims 1 to 5, wherein: the aperture of the top of the gabion is larger than that of the stone.
CN202021233784.XU 2020-06-30 2020-06-30 Simple combined steel plate cofferdam structure for preventing and treating quicksand Active CN213233510U (en)

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CN202021233784.XU CN213233510U (en) 2020-06-30 2020-06-30 Simple combined steel plate cofferdam structure for preventing and treating quicksand

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Application Number Priority Date Filing Date Title
CN202021233784.XU CN213233510U (en) 2020-06-30 2020-06-30 Simple combined steel plate cofferdam structure for preventing and treating quicksand

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113202119A (en) * 2021-05-20 2021-08-03 中国水利水电第十一工程局有限公司 Combined cofferdam for strong-flow sand-ground layer gabion construction of linear river channel and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113202119A (en) * 2021-05-20 2021-08-03 中国水利水电第十一工程局有限公司 Combined cofferdam for strong-flow sand-ground layer gabion construction of linear river channel and construction method thereof

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