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Construction method of two-wall sandwiched plastic film for sandy soil dike foundation seepage cutoff

A construction method and technology of cut-off walls, which are applied in infrastructure engineering, water conservancy engineering, sea area engineering, etc., can solve problems such as impracticability and technical difficulties in lapping, so as to improve construction efficiency, avoid sharp bend construction and space obstacles, The effect of increasing the seepage diameter

Active Publication Date: 2018-11-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the construction cost and time, the seepage interception project along the entire embankment cannot be realized only with the construction of the mixing pile machine
[0006] 3. Defects of traditional technology: the traditional method of overlapping two different seepage intercepting curtains is high-spray technology
However, the overlapping treatment technology of two different seepage intercepting curtains, vertical plastic laying and deep mixing piles, is still a difficult point in the construction process.

Method used

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  • Construction method of two-wall sandwiched plastic film for sandy soil dike foundation seepage cutoff
  • Construction method of two-wall sandwiched plastic film for sandy soil dike foundation seepage cutoff
  • Construction method of two-wall sandwiched plastic film for sandy soil dike foundation seepage cutoff

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Suppose a certain section of embankment is located on the sand embankment foundation, the length of the embankment is 1120 meters, the embankment width is 15-20 meters, and the embankment height is 15 meters. This section of embankment has a first sharp bend at 430 meters, with an inflection angle of 30°, and a second sharp bend at 840 meters, with an inflection angle of 45°.

[0034]Carry out embankment seepage intercepting project according to set condition, at first adopt conventional vertical plastic-laying construction in embankment straight line section, form the anti-seepage groove (1) of the vertical plastic-laying of 2.5 meters wide, then adopt the sand embankment that the present invention proposes The two-wall plastic film sandwich construction method for base seepage interception is used to construct the first inflection point of the first sharp bend of the embankment, and the specific steps are as follows:

[0035] The first step is to determine the vertica...

Embodiment 2

[0041] Suppose a section of embankment is located on a sandy soil embankment foundation, with a dike length of 360 meters, a dike width of 15-20 meters, and a dike height of 15 meters. This section of embankment has a sharp bend section at 180 meters, and the inflection point angle of the sharp bend section is 35°.

[0042] The embankment seepage interception project of this section adopts conventional vertical plastic-laying construction in the straight section of the embankment to form a 2.5-meter-wide vertical plastic-laying anti-seepage groove (1), and then adopts the two walls proposed by the present invention for intercepting seepage of the sand embankment foundation The plastic film construction method is used to construct the first inflection point of the sharp bend section of the embankment. The specific construction steps are as follows:

[0043] The first step is to determine the vertical plastic laying slot line: accurately determine and record the slotting starti...

Embodiment 3

[0048] Assume that a section of embankment is located on a sandy soil embankment, with a length of 520 meters, a width of 15-20 meters, and a height of 15 meters. This section of embankment has a sharp bend section at 310 meters, and the inflection point angle of the sharp bend section is 27°.

[0049] The embankment seepage interception project of this section adopts conventional vertical plastic-laying construction in the straight section of the embankment to form a 2.5-meter-wide vertical plastic-laying anti-seepage groove (1), and then adopts the two walls proposed by the present invention for intercepting seepage of the sand embankment foundation The plastic film construction method is used to construct the first inflection point of the sharp bend section of the embankment. The specific construction steps are as follows:

[0050] The first step is to determine the vertical plastic laying slot line: accurately determine and record the slotting starting point of the anti-s...

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Abstract

The invention relates to a construction method of a two-wall sandwiched plastic film for sandy soil dike foundation seepage cutoff. A sandy soil dike foundation seepage cutoff curtain at least built by an anti-seepage slot (1), the plastic film (2), backfill clay (3), an upstream side stirring pile unit wall (4), a downstream side stirring pile seepage cutoff wall (5) and lap-joint stirring pile seepage cutoff walls (6) on the two sides is closed. The construction method is characterized by comprising the following specific steps that first, a vertical laying plastic slotted line is determined; second, vertical laying plastic construction is conducted; third, stirring pile construction is conducted; and fourth, the upstream side stirring pile unit wall (4) and the downstream side stirringpile seepage cutoff wall (5) are closed and connected in a lapped mode. The problem of lap-joint treatment of a vertical laying plastic seepage cutoff curtain and a deep-layer stirring pile seepage cutoff curtain can be solved, so that a more economical and practical combined seepage cutoff curtain is formed. The construction method has the remarkable application benefits and very wide market promotion prospects.

Description

technical field [0001] The invention belongs to the technical field of embankment seepage interception construction in water conservancy projects, and in particular relates to a plastic-film sandwich construction method for sand embankment foundation seepage interception. technical background [0002] Seepage interception with vertical plastic laying and deep mixing piles are common dike seepage interception techniques in water conservancy projects in my country. In the process of vertical seepage interception construction, seepage cutoff membrane or concrete cutoff wall is usually buried at the dam root on the upstream side of the dam to cut off the seepage channel in the ground below the dam root and protect the safety of the dam. The construction process is mature and the cutoff The seepage effect is better. [0003] However, for most embankments and river embankments, it is difficult to use the above methods alone for the following reasons: [0004] 1. Due to factors s...

Claims

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Application Information

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IPC IPC(8): E02B3/16E02D19/18
CPCE02B3/16E02D19/18
Inventor 孙树林吴正松姜华孙建东张德恒
Owner HOHAI UNIV
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