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Construct and construction method of preventing pavement around manhole from subsiding

A construction method and inspection well technology, which can be used in infrastructure engineering, soil protection, construction, etc., can solve the problems of poor backfill around the inspection well and road subsidence.

Inactive Publication Date: 2012-01-18
刘建华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a structure and construction method for preventing road subsidence around inspection wells, so as to solve the problem of road subsidence caused by insufficient backfilling around inspection wells in the prior art

Method used

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  • Construct and construction method of preventing pavement around manhole from subsiding
  • Construct and construction method of preventing pavement around manhole from subsiding
  • Construct and construction method of preventing pavement around manhole from subsiding

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Embodiment Construction

[0012] When the pipeline groove is backfilled to the bottom surface level of the road base 6, an annular groove 8 is dug out on the periphery of the inspection well 1, the inner diameter of the annular groove 8 is the same as the outer diameter of the inspection well 1, and the outer diameter is increased by 1000 mm outside the inner diameter. That is, the ring width is 1000 millimeters, and the depth of the annular groove 8 is 250 millimeters. Six grouting holes 9 are evenly distributed in the middle of the annular groove 8 around the inspection well 1, and the grouting holes 9 adopt a drilling rig to drill holes with a diameter of 100 millimeters and a depth close to the bottom of the well. Put a grouting pipe 2 in each grouting hole 9, and the grouting pipe 2 adopts the steel pipe processing of diameter 25 millimeters, and the bottom will be sealed, and on the pipe wall of the grouting pipe 2, every 100 millimeters are uniformly drilled. Four small holes of 5mm are threaded...

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Abstract

The invention relates to a construct and a construction method of preventing a pavement around a manhole from subsiding, which belong to the field of urban road projects and relate to a road structure and a method of strengthening the pavement around the manhole. The construct mainly comprises the manhole, grouting pipes, cushion caps and bar mat reinforcements, wherein the grouting pipes are arranged at the external side of the manhole circularly; the cushion caps are supported on the grouting pipes; cement paste is injected into the grouting pipes so that soil is solidified and the density of the soil is improved; the cement paste which permeates through the soil is in a capillary shape and is distributed around the grouting pipes so that the friction force between the grouting pipes and the soil is improved; and a basement layer and a surface layer of a road are supported by the grouting pipes and the cushion caps so that the pavement does not settle. The construction quality of the road is ensured; the settlement of the pavement around the manhole is effectively prevented; the driving safety is ensured; and the maintenance cost of the pavement is reduced through the construct and the construction method of preventing the pavement around the manhole from subsiding.

Description

technical field [0001] The invention relates to a structure and a construction method for preventing road surface settlement around inspection wells, belonging to the field of urban road engineering, and in particular to a structure and a construction method for reinforcing road surfaces around inspection wells. [0002] Background technique [0003] Underground pipelines under urban roads are an important part of urban infrastructure. Various underground pipelines need to be buried underground with a certain safety distance, and all buried under the sidewalk. The width of the sidewalk cannot meet the requirements. Therefore, the "Urban Engineering Pipeline Comprehensive Planning Specification "(GB289-98) stipulates that "The planned position of engineering pipelines under the road should be arranged under sidewalks or non-motorized vehicle lanes. Engineering pipelines such as telecommunications cables, water supply, gas transmission, and sewage and rainwater drainage can be...

Claims

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Application Information

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IPC IPC(8): E02D3/12
Inventor 黎晓林苏国宏胡斌刘建华
Owner 刘建华
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