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Construction method for compacting high loess-filled embankment by combining vibration roller compaction with dynamic compaction

A technology of loess high filling body and construction method, which is applied in the fields of soil protection, infrastructure engineering, construction, etc., can solve the problems of inability to impact reinforcement, etc., and achieve the effects of eliminating collapsibility, saving costs, and shortening the construction period

Inactive Publication Date: 2011-11-23
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

This method adopts the joint construction of vibratory rolling and dynamic compaction, which ensures the compaction effect of powdery loess as filling material, and solves the problem that impact reinforcement cannot be carried out on the basis of vibratory rolling due to limited space. Better control of post-construction differential settlement of high fill bodies

Method used

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  • Construction method for compacting high loess-filled embankment by combining vibration roller compaction with dynamic compaction
  • Construction method for compacting high loess-filled embankment by combining vibration roller compaction with dynamic compaction
  • Construction method for compacting high loess-filled embankment by combining vibration roller compaction with dynamic compaction

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the drawings and embodiments of the specification.

[0015] Such as figure 1 As shown, the specific steps of combined vibratory rolling and dynamic compaction in the construction area are as follows:

[0016] Evenly spread the loose powdery loess to a height of 0.4m, and roll it 10 times with a 50T vibratory roller at a speed of 3km / h; after the first rolling, spread the second layer of loose powdery loess evenly, and then crushed in the same way,

[0017] When the filling body is filled in layers to a height of 6m, a 3000kN·m energy-level dynamic compaction machine is used to carry out spot tamping at a distance of 4m, and then every 6m.

[0018] After one round of tamping is completed, use a high-precision level to measure the average ramming settlement of the filling body, and stop tamping when the average ramming settlement of the filling body meets the standard for stopping tamping;

[001...

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Abstract

The invention discloses a construction method for compacting a high loess-filled embankment by combining vibration roller compaction with dynamic compaction, and the specific construction method comprises the following steps: spreading out silt till the height of 0.4m and adopting a 50T vibratory roller to roll 10 times at the traveling speed of 3km / h; adopting a 3000kN.m-energy level dynamic compactor to perform point compaction at intervals of 4m when a body to be filled and built is filled and built in layers to the height of 6m; using a high-precision water level gauge to measure the average settlement of the filled and built body after completing one-time ramming and stopping ramming when the single-time average settlement is less than or equal to 0.05m; and continuously repeating the operation till the body is filled and built to the design scale height. By adopting the construction method, the problem that impact reinforcement can not be performed on the basis of the vibration roller compaction due to the limited space is solved, the loess collapsibility can be eliminated, the cost is simultaneously saved, the construction period is shorted, the degree of compaction of the filled and built body can be improved to 0.996 to the maximum extent, the dry density can be improved to 1.93g / cm<3> to the maximum extent, the characteristic value of bearing capacity of a foundation can achieve 350kPa and the post-construction differential settlement of the high embankment can be better controlled.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering construction, in particular to a construction method for compacting a loess high-fill body in combination with vibratory rolling and dynamic tamping. The method can compact the high-thick loess fill body to meet the specification requirements. Background technique [0002] The treatment methods of the existing filling body generally include: compaction (hammer tamping method, mechanical rolling method, vibratory compaction method, impact compaction method, strong tamping method), drainage consolidation method (loading preloading method, overloading preloading method, sand well method, vacuum preloading method, lowering water level method). However, most of the methods for this type of foundation come from other soil high-fill foundation treatment technologies, and the effect of using a single process to treat ultra-high loess fill bodies is not ideal. Moreover, due to limited site...

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Application Information

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IPC IPC(8): E02D3/046
Inventor 胡长明梅源魏弋锋王雪艳赵浩林源
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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