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Construction method for grouting reinforcement of urban road roadbed in fly ash accumulation site

A grouting reinforcement, fly ash technology, applied in the direction of roads, roads, infrastructure engineering, etc., can solve the problems of deep compaction effect, urban noise pollution, limited reinforcement depth, etc., to improve the unstable characteristics of engineering, reduce Urban noise factor, the effect of reducing labor input

Inactive Publication Date: 2021-10-15
JINAN YELLOW RIVER CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of long time-consuming, large floor area, high cost, noise generation, urban noise pollution, and difficulty in achieving the compaction effect in the existing fly ash accumulation site treatment project. Reinforcement depth limited problem

Method used

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  • Construction method for grouting reinforcement of urban road roadbed in fly ash accumulation site
  • Construction method for grouting reinforcement of urban road roadbed in fly ash accumulation site
  • Construction method for grouting reinforcement of urban road roadbed in fly ash accumulation site

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Experimental program
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Effect test

Embodiment 1

[0028] refer to Figure 1-3 , a grouting reinforcement construction method for urban road subgrades in fly ash accumulation sites, the operation process is as follows:

[0029] Step 1, first establish the construction target position, clean up the site, measure and set out the line to determine the hole position of the grouting hole 3 for piling grouting, and make the grouting pipe 4;

[0030] Step 2: After establishing the position of the grouting hole 3, use an auger drill to form the hole. The depth of the drilled hole is 0.4-0.6m from the fly ash soil layer 1 to the undisturbed soil layer 2, and the diameter and length of the grouting hole 3 range from 80- 100mm, grouting hole 3 spacing 1m, after hole cleaning;

[0031] Step 3, put the cleaned grouting hole 3 into the grouting pipe 4, evenly fill sand around the grouting pipe 4 in the hole, and seal the hole sealing pipe 5 within 1m above the orifice with blended cement mortar. hole;

[0032] Step 4: After grouting and ...

Embodiment 2

[0037] refer to Figure 1-3 , a grouting reinforcement construction method for urban road subgrades in fly ash accumulation sites, which is basically the same as in Example 1. Furthermore, in the specific implementation process, firstly, the construction target position is established, the sundries in the construction site are cleaned, and the measurement is carried out. Set out the distance from the line, determine the hole position of the grouting hole 3 for piling grouting, and make the grouting pipe 4. The grouting pipe 4 is a steel pipe with a diameter and wall thickness of 25mm. The grouting pipe 4 includes the sealing pipe 5 and the sealing pipe 5 The length is 1m, the permeation tube 6 is fixedly connected under the sealing tube 5, and permeation holes 61 are arranged around the permeation tube 6. The permeation holes 61 are opened with 3 holes on the circumference of the permeation tube 6 according to the interval of 500 mm, which is arranged in a plum blossom shape. T...

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Abstract

The invention discloses a construction method for grouting reinforcement of an urban road roadbed in a fly ash accumulation site, which belongs to the technical field of roadbed reinforcement treatment of a fly ash accumulation site, and comprises the following steps of: determining a construction target position, cleaning the site, measuring and setting out to determine hole positions of grouting holes for piling and grouting, and manufacturing grouting pipes; forming holes by adopting a spiral drilling machine, wherein the depth range of the drilled holes penetrating through a fly ash soil layer to the position below an undisturbed soil layer is 0.4-0.6 m, the diameter length range of the grouting holes is 80-100 mm, and the distance between the grouting holes is 1 m, and cleaning the holes after the holes are formed; placing the grouting pipes into the cleaned grouting holes, filling evenly the space around the grouting pipes in the holes with sand, and sealing hole sealing pipes in the range of 1 m above the hole openings with blended cement mortar; 24h after grouting and hole sealing are conducted, using pure cement paste for pressure grouting and monitoring the grouting pressure value, wherein the grouting construction sequence is from the periphery to the middle, and hole separation construction is carried out. The purposes of improving the foundation bearing capacity and the deformation resistance and improving the engineering instability characteristic are achieved, the treatment time is shortened, and the treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of roadbed reinforcement treatment at a fly ash accumulation site, in particular to a construction method for grouting reinforcement of an urban road subgrade at a fly ash accumulation site. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion. It is the main solid waste discharged from coal-fired power plants. Fly ash can be used as a filling material for embankments and has been used in a large number of projects. Compared with Compared with ordinary fine-grained soil, it has the characteristics of light weight, high strength, low compressibility and good water permeability; [0003] As for the fly ash accumulation site, because the specific engineering factors were not considered when the fly ash was deposited at that time, it often had the characteristics of high water content, high compressibility, low compactness, and weak bearing capacity, and the eng...

Claims

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Application Information

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IPC IPC(8): E01C3/04E01C3/00E02D3/12C04B28/04C04B111/70
CPCE01C3/04E01C3/00E02D3/123C04B28/04C04B2111/70C04B14/06
Inventor 马维佳张继峰李宗杰刘洪洋张志远
Owner JINAN YELLOW RIVER CONSTR GRP CO LTD
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