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Enclosing type deepwater platform construction method based on condition of sand backfilling balance method

A technology of sand return balance and construction method, applied in basic structure engineering, construction and other directions, can solve the problem of no reliable and effective construction method, and achieve the effect of high construction feasibility, guaranteeing construction safety, and reducing the cofferdam area.

Active Publication Date: 2016-01-06
ANHUI HIGHWAY BRIDGE ENG CO LTD
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Problems solved by technology

However, due to the constraints of bridge line position, bridge type, span, cost and other factors, the above situation is sometimes unavoidable, that is, sometimes it is unavoidable to set up cofferdams in deep-water sand layers
And there is no reliable and effective construction method in the prior art that can carry out construction under this condition

Method used

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  • Enclosing type deepwater platform construction method based on condition of sand backfilling balance method
  • Enclosing type deepwater platform construction method based on condition of sand backfilling balance method
  • Enclosing type deepwater platform construction method based on condition of sand backfilling balance method

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Embodiment Construction

[0027] This example is in figure 1 The bridge cap foundation is built in the environment shown, such as figure 1 As shown, the riverbed where the steel sheet pile 3 is located below the water level is a sandy riverbed or other steep soil riverbed, the steel sheet pile 3 is embedded and driven to the depth of the riverbed, and the sandy surface of the riverbed surface has a relatively large slope, so it is not suitable for slotting Or other methods to fix the steel sheet pile.

[0028] see figure 1 , figure 2 , image 3 and Figure 4 , in this embodiment, the construction method of the enclosure type deep-water cap platform based on the sand return balance method is carried out according to the following steps:

[0029] Step 1: Complete the hammering and inserting construction of the steel sheet pile 3 and the welding and installation construction of the inner support 6a in the top layer of the steel sheet pile 3 on the riverbed surface at the position of the cap to form ...

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Abstract

The invention discloses an enclosing type deepwater platform construction method base on the condition of a sand backfilling balance method. The enclosing type deepwater platform construction method is characterized in that firstly, cofferdams of construction steel sheet piles are formed on the river bed surface, back covering concrete layers are formed in the cofferdams through underwater pouring, and sandy soil of which the height is greater than that of the back covering concrete layers of the outer sides of the cofferdams is sucked to the interior of the steel sheet cofferdams through dredging tubes so that height difference of sandy soil of the inner side of the steel sheet cofferdams and the outer side of the steel sheet cofferdams is reduced; water is extracted gradually in the steel sheet cofferdams and inner supports are installed sequentially, and temporarily stored sandy soil is hoisted out of the cofferdams so that surface layers of the back covering concrete layers are exposed; platform templates are arranged on the back covering concrete layers, and a platform template supporting system is formed by installing I-shaped steel between the steel sheet piles and the platform templates; and first layer platform concrete, concrete top beams and second layer platform concrete are poured in the platform templates in sequence, and sandy soil is backfilled between the steel sheet piles and the platform templates at the same time and the construction of platform concrete is completed. According to the enclosing type deepwater platform construction method, cofferdam platform is easy to construct on abrupt slope or deepwater sandy riverbed.

Description

technical field [0001] The invention relates to civil engineering construction, in particular to a construction method for a deep-water cap. Background technique [0002] At present, when steel sheet pile cofferdams are constructed on sandy deep-water riverbeds, the construction of the cofferdams, such as implantation, soil sinking, fixing, and bottom sealing, is already quite difficult. When the riverbed slope is large and the size of the cofferdam is limited Construction is very difficult. Therefore, steel cofferdams with doubled rigidity are usually installed in engineering design or places where unfavorable geological, topographical and hydrological conditions coexist, such as deep water, steep slopes, and rocky riverbeds, are usually avoided as far as possible. However, due to the constraints of bridge line position, bridge type, span, cost and other factors, the above situation is sometimes unavoidable, that is, sometimes it is unavoidable to set up cofferdams in deep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/14E02D19/04
Inventor 孙学军沈维成石怀远刘向前徐大振王其见陈小虎
Owner ANHUI HIGHWAY BRIDGE ENG CO LTD
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