Steel boxed cofferdam and recovery method thereof

A technology of steel casings and cofferdams, applied in caissons, sheet pile walls, buildings, etc., can solve the problems of wasting materials, achieve the effects of easy disassembly, reuse, and watertightness

Active Publication Date: 2009-09-02
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] Refer to the attached Figures 1 to 10 , the steel box cofferdam of the present invention includes an upper section 1 and a bottom section 7, both of which are bolted through water-sealed angle steel flanges to ensure watertightness during construction and prevent caps and upsetting columns from contacting water prematurely , affecting its 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 of the upper section panel are evenly distributed in the horizontal direction, and the horizontal ribs 4 are evenly distributed vertically. The ribs mainly strengthen 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 resist fatigue stress is higher than t...

Embodiment 2

[0035] Refer to the attached Figures 1 to 10 , 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 7 meters, which can meet t...

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PUM

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Abstract

The invention relates to a steel box cofferdam and a recovery method thereof, in particular to a steel box cofferdam used in the construction of deep foundations, long-span bridge caps and upsetting columns and a recovery method thereof. The steel caisson of the present invention includes an upper section and a bottom section, between which are bolted with water-tight angle steel flanges; There are horizontal ribs, and the upper panel is bolted with water-tight angle steel flanges; the bottom section includes the bottom panel made of steel plate, the bottom panel is evenly distributed with vertical ribs horizontally, and the bottom panel is detachable and fastened connect. The invention has the advantages of traditional caissons and steel plate cofferdams, can be reused, has low cost, less soil excavation, less impact on adjacent buildings, deep buried caisson foundation, good stability, and greater support load, the water-stop effect is good.

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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Patent Type & Authority Patents(China)
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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