H-shaped steel structure for lap joint of underground diaphragm walls with different thicknesses

A technology of underground diaphragm wall and H-shaped steel, which is applied in the direction of foundation structure engineering, sheet pile wall, excavation, etc., can solve the problems such as the safety of foundation pits that are easily endangered and the safety of various surrounding buildings and structures, and the difficulty of pouring and compacting concrete, so as to improve the foundation pit. Construction safety, improvement of pouring quality, and effect of ensuring construction safety

Pending Publication Date: 2021-06-15
CHANGJIANG SURVEY PLANNING DESIGN & RES
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Problems solved by technology

The joints of the underground diaphragm wall are at places where the thickness changes suddenly, and the seepage path is shorter than that of the underground diaphragm wall of equal thickness, which has hidden dangers of wat

Method used

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  • H-shaped steel structure for lap joint of underground diaphragm walls with different thicknesses
  • H-shaped steel structure for lap joint of underground diaphragm walls with different thicknesses
  • H-shaped steel structure for lap joint of underground diaphragm walls with different thicknesses

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0028] At present, the commonly used underground diaphragm wall 1 has a thickness of 0.6m, 0.8m, 1.0m, 1.2m, and 1.5m, and the corresponding H-shaped steel 9 has a thickness of "0.6-1.5m-2×thickness of the protective layer of steel bars+2×diameter of horizontally distributed steel bars ", taking the thickness of the inner and outer protective layer as 70mm and the diameter of the transverse reinforcement as 20mm as an example, the thicknesses of H-beam 4 are 500mm, 700mm, 900mm, 1100mm and 1400mm respectively.

[0029] The material of H-shaped steel 9 is Q235b steel, and the thickness of the weld seam is 8mm. The construction technology and precision of steel plate weld

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Abstract

The invention relates to an H-shaped steel structure for lap joint of underground diaphragm walls with different thicknesses. An H-shaped steel connector structure (9) is arranged between a first-stage groove section (2) and a second-stage groove section (3), the H-shaped steel connector structure (9) is composed of flange plates (4), webs (5), transverse steel plates (6) and angle steel (7), one ends of the flange plates (4) on the upper side and the lower side of the H-shaped steel (9) are in lap joint with the first-stage groove section (2), and the other ends of the flange plates (4) on the upper side and the lower side of the H-shaped steel (9) are in lap joint with the second-stage groove section (3). The defects that in the prior art, a joint of an underground continuous wall is shorter in a thickness sudden change position and a surrounding seepage path compared with an equal-thickness underground continuous wall, and hidden dangers of water leakage and sand leakage exist are overcome, and the H-shaped steel structure has the advantages that holes are formed in the webs of the H-shaped steel, and the concrete pouring quality is improved, so that the joint water stopping effect is improved, and the excavation construction safety of a foundation pit is ensured.

Description

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Claims

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Application Information

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Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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