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Construction method for filling foam light soil foundation pit of railroad bed in soft soil area

A technology of foam lightweight soil and railway subgrade, which is applied in filling, roads, construction, etc., can solve the problems of high project cost, long construction period, and difficulty in entering construction machinery and materials, so as to reduce project cost and reduce Effect of filling load and reducing additional stress

Inactive Publication Date: 2020-05-08
CHINA RAILWAY LIUYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction period is long, the project cost is high, and the construction machinery and materials are difficult to enter the site

Method used

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  • Construction method for filling foam light soil foundation pit of railroad bed in soft soil area
  • Construction method for filling foam light soil foundation pit of railroad bed in soft soil area

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Embodiment Construction

[0017] In order to better understand the purpose, structure and function of the present invention, below in conjunction with accompanying drawing, a kind of construction method of foam lightweight soil foundation pit filling of railway embankment in soft soil area of ​​the present invention is described in further detail.

[0018] Such as figure 1 Shown, it is shown as the construction method of a kind of soft soil area railway embankment foam lightweight soil foundation pit filling of the present invention, comprises the following steps:

[0019] Step 1: Subgrade construction (leveling construction) is carried out on the original ground, and the construction is carried out under the construction conditions of four connections and one leveling.

[0020] Specifically, in step 1, the work of "four connections and one leveling" before subgrade construction on the original ground includes water supply, electricity supply, road access, telecommunications, and site leveling to prepa...

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Abstract

The invention discloses a construction method for filling a foam light soil foundation pit of a railroad bed in a soft soil area, which comprises the following steps of: performing water supply, electrification, paving, electrification communication and site leveling on the original ground, and then performing roadbed construction on the original bottom surface; performing foundation pit supporting construction and cast-in-situ bored pile construction, excavating inter-pile soil layer by layer, and performing inter-pile soil nailing anchor rod construction between piles; after the soil body is excavated to the designed elevation, performing construction of a fixed structure; after construction of the fixed structure is completed, laying a sandy gravel cushion layer at the bottom of the foundation, and laying a composite geomembrane at the top of the cushion layer; filling light soil is in a layered mode from the bottom of the foundation pit, laying a layer of galvanized wire mesh whenthe light soil is filled to the position 0.4-0.6 m below the elevation of the top face, and after flattening, filling the light soil to the top face of the foundation pit; laying a rubble layer on the top layer of the foam light soil, and laying a layer of composite geomembrane in the rubble layer. The construction quality of the foundation pit fill roadbed in the soft soil area in the limited area can be ensured; and the reliability of roadbed filling construction is ensured.

Description

technical field [0001] The invention relates to the technical field of railway soft soil foundation reinforcement, in particular to a construction method for filling foam light soil foundation pits of railway subgrades in soft soil areas. Background technique [0002] With the rapid development of my country's railway and urban construction, the connection between railway and surrounding supporting projects is getting closer. In the limited soft soil area, the support and filling technology of foundation pit has more prominent technical characteristics. This situation is particularly prominent in large and medium-sized cities with highly developed economies in the world. This phenomenon is relatively common in the southeast coast of my country, so it is necessary to adopt more reasonable technical solutions and adopt safe, reliable and efficient construction methods. [0003] With the development of cities, the scale of railway stations has expanded, and more and more func...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B2/00E02D17/18
CPCE01B2/00E01B2/006E02D17/18E02D2300/0039
Inventor 张强周凯张翔王殿辉欧成章叶海昌王飞于东彬马文君邱磊聂廷立耿耿
Owner CHINA RAILWAY LIUYUAN GRP CO LTD
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