Triangular caisson

Abstract

The invention belongs to the field of dam projects and relates to a caisson. The invention adopts the technical scheme that the triangular caisson is formed by wholly connecting side plates, a bottom plate and sealing plates at the two ends into a box body structure and filling backfill materials; the side plates at the two sides are connected according to node structures; the cross section is approximate to a triangle; the included angles among the side plates and the bottom plates are not more than 60 degrees; the whole caisson is approximate to a triangular prismoid; and when the wave at the front of a dam is greater, the included angles among the side plates and the bottom plate are not more than 45 degrees, i.e., the slope of each side plate is not more than 1:1. The triangular caisson has the technical effects that the project amount of reinforced concrete and the backfill materials per meter of track are obviously less than those of the prior art, the foundation pressure is low and uniform, the overall stability is good, and the practicability, the stability against overturning and the stability against sliding of a soft-soil foundation are greatly improved. The triangular caisson is applicable to the field of the dam projects in regulating buildings, breakwaters, sand control dams and the like.

Description

Technical field: [0001] The invention belongs to the field of dyke engineering, and relates to a dyke body structure, in particular to a caisson structure. Background technique: [0002] The caisson belongs to the traditional dam structure type, and is widely used in dyke projects such as sand control dikes, breakwaters, renovation buildings, bank revetments, etc. The types of caisson structures in the prior art include rectangular caissons, circular caissons (vertically placed in a barrel shape), chamfered angle Parapet caisson, trapezoidal caisson. Its common feature is that it belongs to the gravity structure, relying on the weight of the caisson and the weight of the backfill to resist the effects of waves, water pressure and earth pressure, maintain the overall stability of the structure, and have a strong ability to withstand waves. , usually requires a riprap foundation bed, see the typical section of a rectangular caisson figure 1 . [0003] There are following de...

AI Technical Summary

Problems solved by technology

There are the following disadvantages: 1) Standing waves are formed in front of the wall, and the wave force increases. In order to maintain the overall stability of the structure, a very wide width is required, and the amount of reinforced concrete and backfill per linear meter is relatively large; 2) When the height of the embankment is high, The average base pressure basically increases linearly. Under the action of waves, the base pressure is distributed in a trapezoidal shape, and the local base pressure is further increased. Therefore, it is often impossible to use on soft soil foundations, and thicker riprap is also required on medium bearing capacity foundations. bedding

There are the following deficiencies: 1) The volume and engineering quantity of the chamfered parapet are large, and the economy is not good; 2) Only the chamfered parapet is used to weaken the standing wave effect, and the wave force is still very large, and the wave force of the lower caisson is still a horizontal force. It is beneficial to anti-tilting and anti-sliding stability. The resultant line of action of the wave force on the chamfered parapet points to the outside of the caisson floor. The vertical component of the wave pressure is still the overturning moment for anti-tilting. In order to maintain stability, a wider caisson is still needed width, the amount of reinforced concrete and backfill per linear meter is relatively large; 3) When the height of the embankment is high, the base pressure still basically increases linearly, which cannot be used on soft soil foundations, and requires more embankment on medium bearing capacity foundations. thick riprap bed

There are the following disadvantages: 1) The width of the caisson is relatively wide, and the amount of reinforced concrete and backfill per linear meter is relatively large; 2) The base pressure is basically in a linear relationship with the height of the embankment, and the base pressure is large, so it cannot be used on soft soil foundations. A thicker riprap bed is also required on medium bearing capacity foundations

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