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Combined-rammer construction technology for foundation treatment

A technology for foundation treatment and construction technology, which is applied in basic structure engineering, soil protection, construction, etc., can solve the problems of difficulty in suction hammer and soft ground driving, low bearing capacity increase, insufficient ramming pit depth, etc. To achieve the effect of large punching force, reducing foundation vibration, and obvious effect

Inactive Publication Date: 2012-07-04
刘献刚
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Problems solved by technology

Compared with the traditional dynamic compaction (replacement) method, although this technology has great progress and advantages, it has poor treatment effect on silt, silty soil, saturated miscellaneous filling soil and soft cohesive soil, and the improvement of bearing capacity is not enough. High, and there are often construction problems such as insufficient depth of ramming pit, difficulty in suction hammer and soft ground operation

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  • Combined-rammer construction technology for foundation treatment
  • Combined-rammer construction technology for foundation treatment
  • Combined-rammer construction technology for foundation treatment

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Embodiment Construction

[0044] The present invention will be further described in detail below in conjunction with the implementation steps.

[0045] A combined hammer method foundation treatment construction technology is characterized by:

[0046] 1. When the surface soil of the construction site is soft soil such as silt and muddy soil, which cannot meet the requirements of crane walking and construction operation, the replacement material determined by the test tamping is used to cover the construction site, and the flat hammer is used for full tamping, and the tamping The lap joint is above 1 / 4 of the hammer diameter, and the hammer will stop when the characteristic value of the surface soil bearing capacity reaches 60Kpa;

[0047] 2. Leveling the field: first lay out the lines and arrange points according to the design requirements, and the tamping machine is in place, ready to hit;

[0048] 3. Deep compaction in the first process: use a conical long hammer with a diameter of 1-1.5m and a hamm...

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Abstract

The invention discloses a combined-rammer construction technology for foundation treatment. In the construction technology, a plurality of rammers with different diameters, shapes and pressure intensities are adopted and combined reasonably, and replacement or compacted pier bodies are formed through deep-layer compaction, middle-layer compaction and superficial-layer compaction in virtue of different dynamical pressure equivalents produced by the different rammers, so as to achieve the purpose of improving the effective reinforced depth of a soil body and the bearing capacity of a foundation; and the soil among piers are reinforced and compacted effectively under the action of lateral compression generated during the construction of the pier bodies. The construction technology is the third-generation foundation treatment technology adopting dynamic compaction and dynamic compaction replacement methods, not only gives full play to the technological advantages of a traditional dynamic compaction (replacement) method and a novel pillar-rammer dynamic compaction (replacement) method, but also is developed to a new height, and becomes a fire-new construction technology which is suitable for various soft foundations and has a better reinforcement treatment effect.

Description

technical field [0001] The invention relates to the technical field of construction engineering foundation treatment construction, in particular to a combined hammer method foundation treatment construction process for reinforcing various types of weak foundation soil. Background technique [0002] The treatment of various soft foundation soils is mainly realized by dynamic compaction replacement technology. The traditional dynamic compaction and dynamic compaction replacement technology was invented by the Frenchman Menard and was first used in the foundation treatment project of housing construction. It is the first generation of dynamic compaction replacement technology. A single heavy hammer is used to repeatedly ram the soft foundation soil to achieve compaction. Purpose of foundation soil. When the weak foundation soil layer is thick or the soil layer is complicated, its reinforcement effect often fails to meet the design requirements. Using the traditional dynamic c...

Claims

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Application Information

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IPC IPC(8): E02D3/046
Inventor 刘献刚徐升才
Owner 刘献刚
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