Foundation ditch construction method in water for supporting circuit purlin

Abstract

The invention discloses a construction method for supporting enclosing purlins of foundation pits in water area, which relates to a supporting structure for building the foundation pits. The method mainly comprises plane arrangement of foundation pit construction in water area, concrete girt and supporting construction, and a steel supporting construction process. Finished partial hoist runway pile foundations are utilized to serve as the basis, a foundation pit is connected with land area by adopting a method of building a temporary trestle according to the local water level and the service conditions of the trestle, a combination mode that a tower crane is arranged at the upper part of the foundation pit and a crane ship is arranged outside the foundation pit, is used to hoist a large quantity of materials, a moving platform is placed on a first concrete brace by channel steel, a wood board is paved on the channel steel, an operating platform is used for segmented pavement, and is moved to the next section for repeated use when the construction at one section is finished, thereby finishing the construction method for the supporting enclosing purlin of the foundation pit in waterarea through the steps of concrete girt and concrete supporting construction and steel supporting construction.

Description

Technical field: [0001] The invention relates to a support structure for building foundation pits, in particular to a construction method for supporting purlins in foundation pits above water. Background technique: [0002] At present, the construction of the purlin supporting the foundation pit on the water usually includes the construction plane layout of the foundation pit on the water, the concrete ring beam, the support construction and the steel support construction and other processes. The above-water foundation pit is a water area independent of the temporary embankment. For the construction of various procedures in the foundation pit, the construction channel was originally considered to build an earth embankment from the temporary embankment to the dock mouth, but the construction time of the earth embankment is relatively slow, and this place is in the water level fluctuation zone , the water flow has a great impact on the earth embankment. Although there are meas...

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Problems solved by technology

The above-water foundation pit is a water area independent of the temporary embankment. For the construction of various procedures in the foundation pit, the construction channel was originally considered to build an earth embankment from the temporary embankment to the dock mouth, but the construction time of the earth embankment is relatively slow, and this place is in the water level fluctuation zone , the water flow has a great impact on the earth embankment. Although there are measures such as slope protection, cumbersome maintenance work is still unavoidable, which is not good for the stability of the earth embankment; after the earth embankment is completed, a relatively closed water area is formed between the earth embankments. The stability of the dock cofferdam is also unfavorable

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