A Construction Method of Excavating Excavated Soil for Backfilling Underground Foundation Pit

A technology of backfilling and construction method, which is applied in filling, soil protection, infrastructure engineering, etc., can solve the problems of high excavation and filling costs, large excavation and filling transportation volume, and long cycle, so as to achieve good social and economic benefits and ensure compactness Quality, reduction of cut and fill time and cost effects

Active Publication Date: 2017-02-01
NANTONG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The foundation pit is an earth pit excavated at the foundation design position according to the base elevation and foundation plane size. After the excavation of common underground deep foundation pits, the excavated soil needs to be transported away, and tamping and filling machines are used for backfilling. However, this method has a large amount of excavation and filling transportation, a long cycle, high cost of excavation and filling, and there are also problems such as uneven compaction quality of the backfill soil.

Method used

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  • A Construction Method of Excavating Excavated Soil for Backfilling Underground Foundation Pit
  • A Construction Method of Excavating Excavated Soil for Backfilling Underground Foundation Pit
  • A Construction Method of Excavating Excavated Soil for Backfilling Underground Foundation Pit

Examples

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Effect test

Embodiment 1

[0025] A construction method for backfilling the excavation soil of an underground foundation pit. The method is to sort and pile the temporary excavation soil on the ground near the deep foundation pit 1 on the site where the original deep foundation pit 1 was excavated, and then use the flushing process to excavate The soil is returned to the original deep foundation pit 1 in the form of mud, and the backfilled soil is compacted by drainage during the backfilling process, and the same layer of soil is balanced and adjusted appropriately, and then backfilled layer by layer until the designed floor elevation is controlled So far; the specific steps of the backfill construction method are as follows:

[0026] The first step is to select the excavated earth stacking site: select several temporary excavated earth stacking sites 2 near the deep foundation pit 1;

[0027] The second step, excavation and stacking of excavated soil: excavation of deep foundation pits, the excavation proce...

Embodiment 2

[0033] In this embodiment, on the basis of Example 1, in the first step, when selecting the excavated soil stacking site 2, set the excavated soil stacking site at the opposite corner of the deep foundation pit 1, thereby shortening the mud transportation distance and improving the filling efficiency; In addition, in order to ensure that the excavated soil stack is not easy to collapse, the height of the excavated soil stack can be 3-4m high.

Embodiment 3

[0035] In this embodiment, on the basis of embodiment 1, when the third part of the backfill system is preset, the mud transportation pipeline 6 adopts a rubber mud pipe with a diameter of Φ120, and the mud transportation pipeline 6 is located on the cement road part of the road. The board frame 8 protected by wooden boards strengthens the protection of the mud transportation pipeline 6 and prolongs the service life of the mud transportation pipeline 6.

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Abstract

The invention relates to a construction method for backfilling excavated earth in an underground foundation pit. The method is to sort and accumulate the temporary excavated earth on the ground near the deep foundation pit on the site where the original deep foundation pit was excavated, and then use the filling process The excavated soil is returned to the original deep foundation pit in the form of mud, and the backfilled soil is compacted by drainage during the backfilling process, and the same layer of soil is balanced and regulated, and then backfilled layer by layer until the floor controlled by the design up to the elevation. The present invention has the advantages that: the excavated soil backfill method of the underground foundation pit can greatly shorten the excavation and filling time and cost of the deep foundation pit, and can quickly ensure the restoration of the backfill without the need for tamping and filling machines.

Description

Technical field [0001] The invention relates to the field of building construction, in particular to a construction method for backfilling underground foundation pit excavation. Background technique [0002] The foundation pit is an earth pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. After the current common deep foundation pit is excavated, the excavated soil needs to be transported away, and the ramming machine is used for ramming and filling during backfilling. However, this method has the problems of large excavation and filling transportation volume, long period, high excavation and filling cost, and uneven density of backfilled soil. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a construction of backfilling underground foundation pit excavation that can greatly shorten the time period and cost of excavation and filling of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/18E02D3/10
Inventor 韩选江张志余张爱国陈建陆海阳
Owner NANTONG INST OF TECH
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