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Reinforced structure for foundation with wide defect and construction method thereof

A construction method and foundation reinforcement technology, which is applied to the reinforcement structure and construction field of wide defect foundations, can solve the problems of increasing engineering excavation processing volume, construction complexity and construction period, increased volume of foundation cast-in-place, and poor scheme economy, etc. problems, to achieve the effect of reducing the difficulty of foundation treatment, reducing the difficulty of construction, and reliable structural stress

Active Publication Date: 2012-07-04
POWERCHINA HUADONG ENG COPORATION LTD
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  • Claims
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Problems solved by technology

like figure 1 As shown, due to complex geological conditions, large-width unfavorable geological defects (wide faults, weak zones, broken zones, etc.) are often exposed in the foundation of concrete or masonry structures, such as faults in the foundation surface of a spillway in a project 9-10m wide, 10m wide on both sides of the affected zone, totaling 30m wide, which has a great impact on the project
These weak and unfavorable geological defects cannot meet the foundation requirements of rigid structures such as upper concrete or masonry, and a stable foundation bearing structure must be set up. Sometimes it is also necessary to meet the foundation anti-seepage requirements of water-retaining buildings. Common Engineering Problems in Engineering
[0003] At present, it is an effective treatment method for geological defects with a small width to be excavated to a certain depth and backfilled with concrete plugs. However, when the geological defect has a large span and the deformation of the weak foundation is large, the above method should be used to deal with it. One is to replace the middle part of the bearing structure Larger bending moments will be generated and cracks will easily appear, which is not conducive to structural safety. In order to control the tensile stress, it is necessary to increase the thickness of the replacement body (see figure 2 ); the second is that the volume of the foundation cast-in-place body increases, which may become a large-volume concrete project, which is prone to cracks and requires more complicated temperature control measures; thus significantly increasing the excavation processing volume, construction complexity and construction period of the project, the scheme poor economy

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  • Reinforced structure for foundation with wide defect and construction method thereof
  • Reinforced structure for foundation with wide defect and construction method thereof
  • Reinforced structure for foundation with wide defect and construction method thereof

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Embodiment Construction

[0023] Such as image 3 As shown, in this embodiment, a vertical arch bearing body 5 is arranged above the wider crushing zone 3, and the two ends of the bearing body respectively pass through two abutments 6 (the two abutments are arranged in parallel lines or in sections along their longitudinal direction). are parallel lines) are set on the stable bedrock 2, and the load from the upper part is transmitted to the stable bedrock 2 at both ends, without using geological defects to bear the load. Small, the spanable width is larger, and the basic structure is smaller. The plate beam structure is the main structure, which simplifies the temperature control requirements and is not easy to crack.

[0024] A set of grouting holes 7 is reserved on the carrier 5 . If the anti-seepage curtain line needs to pass through, the curtain grouting can be carried out through the grouting hole 7, and the reinforcement grouting treatment of the geological defect body can also be carried out th...

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Abstract

The invention relates to a reinforced structure for a foundation with a wide defect and a construction method thereof. The invention aims to solve the technical problem of providing a reinforced structure with large span width and large bearing capacity for a foundation with a wide defect and a construction method thereof, so as to reduce the treatment difficulty, improve the bearing capacity of the foundation and reduce the foundation excavation and treatment work amount. To solve the problem, the invention has the technical scheme that the reinforced structure for the foundation with the wide defect is provided with a crushed zone, two sides of the crushed zone are stable bedrock, and a vertical arch style bearing body is arranged above the crushed zone. The construction method comprises the following steps: a, excavating in different positions; b, pouring concrete of an arch support; c, pouring the vertical arch style bearing body; d, carrying out curtain grouting, consolidation grouting, and mortar backfilling of the bottom of a basic structure body; and e, arranging a transition layer above the bearing body for leveling. The invention is mainly used for various hydraulic and hydro-power engineering.

Description

technical field [0001] The invention relates to a reinforcement structure for wide defect foundations and a construction method thereof, and is mainly applicable to various water conservancy and hydropower projects. Background technique [0002] Concrete dams, concrete sluice dams, spillways and other structures with concrete or masonry upper parts are widely used structural forms in water conservancy and hydropower projects. Such as figure 1 As shown, due to complex geological conditions, large-width unfavorable geological defects (wide faults, weak zones, broken zones, etc.) are often exposed in the foundation of concrete or masonry structures, such as faults in the foundation surface of a spillway in a project 9-10m wide, 10m wide on both sides of the affected zone, totaling 30m wide, which has a great impact on the project. These weak and unfavorable geological defects cannot meet the foundation requirements of rigid structures such as upper concrete or masonry, and a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D27/26E02B1/00
Inventor 徐建军何明杰
Owner POWERCHINA HUADONG ENG COPORATION LTD
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