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Construction method for treating costal backfill ultrathick gravel soil foundation by 25000 KN.m dynamic compaction

A construction method and soil foundation technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems that the treatment cannot be reached, and the treatment depth is limited to 10-12 meters, etc., and achieve short construction period, obvious treatment effect, The effect of low cost

Inactive Publication Date: 2018-07-06
山西机械化建设集团有限公司
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  • Abstract
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Problems solved by technology

[0004] Common dynamic compaction energy levels are mostly 4000-8000KN.m, and the treatment depth for backfill foundations is mostly within 10 meters. With the development of ultra-high energy level dynamic compaction, in recent years, with 10000-15000kN. It is used in coastal areas, but its treatment depth is limited to about 10-12 meters, which cannot meet the requirements for treating ultra-thick backfilled gravel soil foundations exceeding 12 meters

Method used

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  • Construction method for treating costal backfill ultrathick gravel soil foundation by 25000 KN.m dynamic compaction
  • Construction method for treating costal backfill ultrathick gravel soil foundation by 25000 KN.m dynamic compaction

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Embodiment

[0027] During the construction, the test rammer is carried out first, and the energy level is increased step by step from the low energy level to the specified energy level. The height of the first blow is 10 meters, the height of the second blow is 15 meters, the height of the third blow is 20 meters, and the height of the fourth blow is 25 meters.

[0028] The specific construction steps are as follows:

[0029] 1) Construction preparation:

[0030] Determine the construction of the ramming surface, and level the site to the elevation of the ramming surface.

[0031] 2) The first pass of main tamp energy level construction:

[0032] Release the first main tamp energy level tamping point on the ramming surface, and carry out the main tamping point dynamic tamping with an energy level of 25000KN. Measure the elevation of the site with the square grid, and calculate the ramming settlement of the first pass of the main ramming site.

[0033] 3) The second energy-level constru...

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Abstract

The invention belongs to the technical field of dynamic compaction foundation treatment in construction engineering, in particular to a construction method for treating a costal backfill ultrathick gravel soil foundation by 25000 KN.m dynamic compaction. The construction method comprises the steps of: (101) construction preparation: determination of construction of a dynamic compaction surface andleveling of a place to reach the elevation of the dynamic compaction surface, (102) primary main compaction energy level construction, (103) secondary main compaction energy level construction, (104)ternary secondary compaction energy level construction, (105) full compaction construction and (106) surface layer grinding. The construction method treats the foundation by 25000 KN.m ultrahigh energy level dynamic compaction, can once treat a gravel soil backfill foundation with a thickness of 17-20 m, meets treatment of a deep soft foundation within an influence range, and has the advantages of obvious treatment effect, simple process, lower cost, short construction period, environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of dynamic compaction foundation treatment in construction engineering, in particular to a construction method of 25000KN.m dynamic compaction for super-thick gravel soil foundation backfilled along the coast. Background technique [0002] With the continuous acceleration of my country's economic construction, the construction land is showing an increasingly tense trend, and land reclamation is an effective measure for coastal cities to solve the construction land. With the increase of the reclamation area and the deepening of the backfill gravel soil layer, the requirements for the reinforcement depth and bearing capacity of the foundation soil are gradually increased. [0003] The dynamic compaction method refers to the method of rapidly consolidating the foundation by dropping a heavy hammer from a certain height to tamp the soil layer in order to improve the bearing capacity of the weak foundation. Usin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/046
CPCE02D3/046
Inventor 张洁玙杨印旺李万福檀艳青武卫军鲍元兆张晓霞谢俊平任冬林
Owner 山西机械化建设集团有限公司
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