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Steel boxed cofferdam and recovery method thereof

A steel case and cofferdam technology, applied in caissons, sheet pile walls, buildings, etc., can solve the waste of materials and other problems, and achieve the effects of easy disassembly, simple water-stop effect, and guaranteed structural strength

Active Publication Date: 2008-07-23
SHANDONG LUQIAO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the steel box cofferdams currently buried in the soil are all disposable, which will waste a lot of materials

Method used

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  • Steel boxed cofferdam and recovery method thereof
  • Steel boxed cofferdam and recovery method thereof
  • Steel boxed cofferdam and recovery method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Referring to accompanying drawings 1 to 10 of the description, the steel box cofferdam of the present invention includes an upper section 1 and a bottom section 7, and the two are bolted through water-sealed angle steel flanges to ensure watertightness during construction and prevent caps and upsets. Columns etc. come into contact with water prematurely, which will affect their service life; the upper section includes the upper section panel 2 made of steel plate, which is used as the main water retaining part, and the vertical ribs 3 are evenly distributed in the horizontal direction, and the vertical ribs are evenly distributed in the vertical direction. The horizontal rib 4 mainly strengthens the structural strength of the caisson to resist the influence of water pressure and tidal force on the caisson. The panels of the upper section are bolted through water-tight angle steel flanges 11 to ensure water seepage prevention. The ability of the angle steel flanges to res...

Embodiment 2

[0035] With reference to accompanying drawings 1 to 10 of the description, the structure of the steel casing cofferdam of the present invention is the same as that of Embodiment 1, and the water seal between its components is sealed with an expansion belt, which is convenient for installation and use.

[0036] If the steel plate column cofferdam is used, the size of the cap is 6.45m×6.45m. In order to meet the construction requirements of concrete anticorrosion and cap formwork support, a 1m operating space is reserved between the cap and the steel plate column. Considering that the height of the steel plate column is 15.5cm , the number of sunken steel sheet piles is odd, and the value is 9.2m. At the same time, an inner fence is installed, so that the total engineering quantity and steel consumption of each steel sheet column cofferdam is 112.64t. And if the steel box cofferdam of the present invention is adopted, the steel box cofferdam adopts 8.05m×8.05m, and the height is ...

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Abstract

The invention relates to a steel boxed cofferdam and the recovery method, especially a steel boxed cofferdam suitable for bridge bearing platforms with deep foundation and wide span, and the recovery method, comprising an upper section and a bottom section which are bolted together by a plurality of watertight angel steel flanges, wherein the upper section is composed of a plurality of upper panels made of steel sheets; each upper panel is laterally distributed evenly with a plurality of vertical ribs and vertically distributed evenly with a plurality of horizontal ribs; the upper panels are bolted together by the watertight angel steel flanges; the bottom section is composed of a plurality of bottom panels which are laterally distributed evenly with a plurality of vertical ribs; and the bottom panels are detachably fastened together. Besides the advantages of traditional caisson and steel plate cofferdam, the steel boxed cofferdam and the recovery method has other advantages of reusability, smaller influence on the neighboring constructions due to less amount of dug soil, low cost and good stability since the caisson is deeply buried to ensure a relatively large bearing and good water-resistant effect.

Description

(1) Technical field [0001] The invention relates to a steel box cofferdam, especially a steel box cofferdam used in the construction of deep foundations, long-span bridge caps and upsetting columns. The invention also relates to a recycling method for the steel box cofferdam. (2) Background technology [0002] In recent years, with the growth of traffic demand, the increase of bridge span and the increase of foundation water depth, especially in recent years, the continuous construction of the Gulf Strait and cross-river bridges has continuously increased the requirements for deep water foundation construction. From the initial caisson, caisson Well foundations have developed into pipe string foundations, various composite foundations, and then various types of pile foundations, double cap pipe string foundations, multi-column foundations, underground diaphragm wall foundations, etc., to adapt to complicated construction conditions. The latest statistics show that the applic...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D9/02E02D23/00
Inventor 范效滨王书明胡信侯金福单学民
Owner SHANDONG LUQIAO GROUP
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