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Testing system and method for foundation processed by combining on-site dynamic compaction with pre-strain reinforcement

A test method and test system technology, which are applied in the field of test systems for joint treatment of ground with dynamic compaction and pre-strain reinforcement, can solve problems such as large ground bearing capacity, and achieve the effect of reliable calculation, simple and practical calculation method

Inactive Publication Date: 2018-09-11
CHANGSHA UNIVERSITY
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  • Application Information

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Problems solved by technology

[0002] Combined treatment of subgrade with dynamic ramming and prestrain reinforcement combines two construction methods that are frequently used independently, the on-site dynamic ramming and prestrain reinforcement. It is widely used in highway subgrade reinforcement, but the reinforcement mechanism and design theory of dynamic compaction method and prestrain reinforcement method still need further research and innovation

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  • Testing system and method for foundation processed by combining on-site dynamic compaction with pre-strain reinforcement
  • Testing system and method for foundation processed by combining on-site dynamic compaction with pre-strain reinforcement
  • Testing system and method for foundation processed by combining on-site dynamic compaction with pre-strain reinforcement

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Embodiment Construction

[0027] The implementation process of the embodiment of the present invention is as follows:

[0028] According to the design data, the filling section above 10m is reinforced by dynamic tamping method, the tamping energy is 1200kN m, the falling height of the rammer is 10.0m, the diameter of the rammer is 2.0m, and the distance between the ramming point and the ramming point is 3.5m (such as figure 1 ).

[0029] Field trials such as image 3 shown. Buried settlement plates and inclinometer tubes to measure the total settlement, layered settlement and horizontal displacement, and measure the tamp settlement after each tamping and the settlement or uplift of surface soil near the tamping point with a level gauge; measure each settlement plate The settlement difference is used to analyze and compare the effect of dynamic compaction; the lateral displacement of the slope is measured by the total station to determine the impact of dynamic compaction on the slope. During the tes...

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Abstract

The invention discloses a testing system and method for a foundation processed by combining on-site dynamic compaction with pre-strain reinforcement. On the one hand, the testing system comprises a plurality of layers of settlement plates which are buried at equal altitude in the length direction of a road of which the fill is Km or above, and inclined testing pipes buried in the width direction of the road; the surface soil of the road is uniformly provided with a plurality of effective strengthening zones, each effective strengthening zone is internally provided with a compaction point, andthe distance between the centers of every two adjacent compaction points is Lm; the hammer bottom and the periphery of each compaction point are provided with a row of displacement piles; the slope ofthe road is provided with a total-station instrument for measuring the lateral displacement of the slope; and on the other hand, a geosynthetic material is laid on the compacted foundation and is stretched and anchored, and a composite foundation is formed. The power dynamic compaction and pre-strain reinforcement composite theory and technology are disclosed, the reasonable design scheme is provided for on-site construction of the technology for the foundation processed by combining on-site dynamic compaction with pre-strain reinforcement, simple and practical compaction settlement and stress-strain computing methods are provided, and computing is reliable and convenient.

Description

technical field [0001] The invention relates to the field of flexible composite foundations in civil engineering, in particular to a test system and method for combined treatment of foundations by on-site dynamic compaction and prestrain reinforcement. Background technique [0002] Combined treatment of subgrade with dynamic ramming and prestrain reinforcement combines two construction methods that are frequently used independently, the on-site dynamic ramming and prestrain reinforcement. It is widely used in highway subgrade reinforcement, but the reinforcement mechanism and design theory of dynamic compaction method and prestrain reinforcement method still need further research and innovation. Contents of the invention [0003] The present invention aims to provide an on-site dynamic compaction and pre-strain reinforcement test system and method for joint treatment of foundations. For the first time, the two independently used construction methods are organically combine...

Claims

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Application Information

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IPC IPC(8): E02D1/02E02D3/00E02D3/046
Inventor 匡希龙雷鸣沈炼袁月华黄筑强
Owner CHANGSHA UNIVERSITY
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