Method and device for assisting construction of underwater open caisson

A caisson and water flow technology, applied in caissons, infrastructure engineering, construction, etc., can solve problems such as caisson tilting and endangering bridge construction safety, and achieve the effects of reducing water flow velocity, saving construction costs, and reducing tilt risks

Pending Publication Date: 2019-04-02
CCCC SHEC FOURTH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A little carelessness will easily lead to serious inclination of the caisson, endangering the safety of bridge construction

Method used

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  • Method and device for assisting construction of underwater open caisson
  • Method and device for assisting construction of underwater open caisson
  • Method and device for assisting construction of underwater open caisson

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, a method for assisting the construction of caissons in water uses a diversion structure capable of diverting water to divert the water flow, and installs the caisson 3 behind the diversion structure.

[0025] Utilizing the diversion structure to divert the water flow can make the water flow along the outer surface of the diversion structure, and reduce the flow velocity of the water flow behind the diversion structure, and the caisson behind the diversion structure can reduce the impact on the caisson 3 during construction. The thrust of the water flow can reduce the resistance during the sinking process of the caisson 3, reduce the scale of the caisson positioning device, improve the construction efficiency and construction positioning accuracy, and significantly save the construction cost.

[0026] The cross-sectional area of ​​the distribution structure gradually increases along the direction of water flow. In this way, the water flow can be made ...

Embodiment 2

[0029] Such as figure 1 As shown, on the basis of the above embodiments, in this embodiment, two plate structures 1 are used to form a V-shaped structure to form a diversion structure, and the plate structures 1 are driven into the riverbed below. Combining the plate structure 1 to form a V shape has the advantages of simple structure, convenient use, quick operation, etc., and can quickly form an effective shunt structure. According to specific needs, the included angle of the V shape can be adjusted.

[0030] The smaller the included angle is, the smaller the included angle is, the smoother the water flow transition is, and the smaller the influence on the water flow is, the better the diversion effect is, and the longer the length of the plate-shaped structure 1 required to meet the conditions that can fully cover the range of the caisson 3 The longer, the more consumables, the greater the project volume, and the higher the cost.

[0031] The larger the included angle, th...

Embodiment 3

[0034] On the basis of the above embodiments, in this embodiment, the plate structure 1 adopts one of metal plates, steel sheet piles and steel sheet piles, and interlocking steel pipe piles and interlocking steel pipe piles. form.

[0035] The metal plate can be used to directly construct the diversion structure, just bury the metal plate deep in the river bed, or weld two metal plates into a V shape for construction, or use other connection methods to connect the two metal plates into a V The metal plate has the advantages of convenient construction, high strength and strong impact resistance. In order to meet the anti-corrosion performance, corrosion-resistant metal plates, such as aluminum alloy plates, stainless steel plates, etc., can be used. Reinforced concrete slabs can also be used.

[0036] To use steel sheet piles to connect steel sheet piles, it is necessary to sequentially drive multiple steel sheet piles into the river bed, and then make adjacent steel sheet p...

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Abstract

The invention discloses a method and device for assisting the construction of an underwater open caisson. Water flow is divided by using a flow dividing structure capable of performing flow dividing on water, and the open caisson is installed behind the flow dividing structure, wherein a V-shaped curtain formed by connecting two plate-shaped structures is included. The method and device for assisting the construction of the underwater open caisson have the beneficial effects that the flow field characteristics of the water flow in an open caisson area can be changed by utilizing the flow dividing structure, the water flow speed is reduced, the water flow impact force on the open caisson in the process of the open caisson can be reduced, the reduction of resistance in the process of the open caisson is facilitated, then the scale of an open caisson positioning device is reduced, the positioning accuracy of the open caisson is improved, the efficiency of construction of open caisson positioning is improved, and the risk of the open caisson construction is reduced significantly.

Description

technical field [0001] The invention relates to the technical field of caisson construction, in particular to a method and device for assisting caisson construction in water. Background technique [0002] Overwater caissons are widely used in the construction of large bridge foundations. Due to the flow velocity of river water (river water or sea water), larger caisson structures are often subjected to greater water flow forces, which brings great difficulties to the stability of caisson positioning on the water. At the same time, due to the large size of the caisson, and the shape is mostly rectangular and round-ended, the water retaining area of ​​the upstream surface is large, and the shape changes greatly, resulting in obvious water flow circumvention. Correspondingly, due to the rapid increase of the local flow velocity, the sand-carrying capacity of the water flow is enhanced, which in turn causes the sand and soil loss on the caisson's upstream surface and nearby are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D23/00
CPCE02D23/00
Inventor 李有为张鸿张永涛
Owner CCCC SHEC FOURTH ENG
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