CN105220701A - Vertical slotting film anti-permeation method - Google Patents
Vertical slotting film anti-permeation method Download PDFInfo
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- CN105220701A CN105220701A CN201510553686.1A CN201510553686A CN105220701A CN 105220701 A CN105220701 A CN 105220701A CN 201510553686 A CN201510553686 A CN 201510553686A CN 105220701 A CN105220701 A CN 105220701A
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Abstract
The invention discloses a kind of vertical slotting film anti-permeation method, concrete steps are as follows: place flattens, setting-out, equipment location, fluting, and slurry strengthened wall, the process control of bottom land height, lay HDPE geomembrane, trench backfill becomes wall, quality examination.The present invention is long distance levee seepage processing method, and the method handling procedure is simple, and easily, cost is inexpensive, and anti-seepage effect is good in construction.
Description
Technical field
The present invention relates to levee seepage and stablize anti-seepage processing method, for high-grade dyke levee body, embankment foundation influent process provide a kind of new technology.
Background technology
China river levee engineering battle line is long, protection domain is wide, dyke location natural environment, soil property situation, builds up age, social condition etc. and there is very big-difference, and seepage stability deficiency is one of major issue of dyke existence.Its main cause is: levee body cross dimensions is not up to standard, and levee body, levee foundation have pervious layer to exist, and the high water level flood passage time is long, and levee toe seeps water, and with phenomenons such as piping, stream soil, is the potential risk breached a dyke.Osmotic control has tiling gland antiseepage usually, vertical cutting is oozed, reduced pressure and lead measures such as oozing.Tiling gland antiseepage land occupation area is large, and difficult quality controls; Decompression leads that to ooze investment higher, and long-acting management difficulty is larger; Vertical section infiltration method is a lot, and some investments are little but effect is poor, and some effects are fine but investment is higher.
Summary of the invention
The object of the invention is to: provide a kind of vertical slotting film anti-permeation method, be a long distance levee seepage processing method, the method handling procedure is simple, and easily, cost is inexpensive, and anti-seepage effect is good in construction.
Technical solution of the present invention is: the method is slotted to projected depth by chain type the trench saw, and be layed in groove by HDPE geomembrane and form vertical grouting curtain, concrete steps are as follows:
(1) place leveling: for ensureing that mechanical vertical laying plastic film reaches projected depth, place is roughly flattened;
(2) setting-out, equipment location, fluting: according to designing requirement, locating open groove center line position, placement devices, mechanical slotting; Adopt chain type the trench saw to scrape embankment undisturbed soil, cut, cut, take the soil body out of ground, form continuous deep trouth, groove depth at 10-15m, groove width 0.22-0.26m;
(3) slurry strengthened wall: in grooving process, adopt mud to support cell wall, in groove, mud liquid level and work plane remain basically stable simultaneously;
(4) bottom land height process control: groove depth is greater than plastic film mulch degree of depth 0.8-1m;
(5) HDPE geomembrane is laid: after groove reaches projected depth, vertical film bar is inserted volume to be had in the steel pipe of HDPE geomembrane, often roll up the long 50-60m of film, adopt crane to be inserted in groove by integral membrane volume, pull smoothly HDPE geomembrane expanded synchronous with the trench saw of film bar to form vertical grouting curtain in groove;
(6) trench backfill becomes wall: HDPE geomembrane bankets after laying in time, rapidly solidified one-tenth wall;
(7) quality examination: the step sequential production of above-mentioned 1-6 is until workshop section terminates; Construction terminates rear employing test pit method and carries out detection examination.
Wherein, when vertical laying plastic film, the connection between film volume adopts sewing or splicing processes to carry out joint process, and sew up cigarette and be no less than 4 layers, lap length is no less than 3m.
The present invention has the following advantages:
1, slotted to projected depth by chain type the trench saw, HDPE geomembrane is layed in groove and forms vertical grouting curtain, block seepage channel, eliminate safe hidden trouble.
2, vertical slotting film good seepage-proof property, friction, noise is low, and environment pollution is little, and expense of reinforcing is few, adapts to water conservancy requirement of engineering.
3, adopt mechanical execution, follow construction sequence, introduce detection means, form long distance levee seepage solution.
4, adopt chain type the trench saw to scrape embankment undisturbed soil, cut, cut, the soil body is taken out of ground and form continuous deep trouth, be suitable for comparatively Complicated Geologic Condition, as: clay loam, gravel soil, containing tree root and fragmentary finger stone etc.
5, adopt slurry strengthened wall, mud is equivalent to support liquid, prevents landslip of the sides of the trench.
6, groove depth is greater than plastic film mulch degree of depth 0.8-1m, and reserved sandy soil back-silts precipitation, and can enable reverse circulation system in order to avoid deposited dark, elevation at the bottom of science control flume, ensures workmanship.
7, after HDPE geomembrane is laid, banket rapidly solidified one-tenth wall in time, in case groove caves in, geomembrane floats and photo-damage.
Accompanying drawing explanation
Fig. 1 is the vertical section schematic diagram vertically inserting mould construction.
Fig. 2 is the floor map of vertically inserting mould construction.
Fig. 3 is the schematic cross section of vertically inserting mould construction.
Fig. 4 is that mould phreatic line change sketch is vertically inserted in lake, embodiment Xinyihe River size land.
In figure: 1 chain type the trench saw, 2HDPE geomembrane, 3 film bars, 4 groove depths, 5 groove widths, 6 chain direction of rotation, deep trouth after 7 excavations, 8 embankments.
Detailed description of the invention
Further illustrate technical solution of the present invention below in conjunction with specific embodiment, embodiment can not be interpreted as it is restriction to technical scheme.
Embodiment: for lake, Xinyihe River size land Anti-seeping technology engineering, technical solution of the present invention is described.
Basic condition: Xinyihe River is the water access to the sea, a Yi Shu Sihong of hand excavation in 1949, design discharge 6000m
3/ s, total length 146km.Lake, size land vulnerable spots is positioned at dike East China, Henan, Xinyi, Guannan two county intersection, long 12km.Because this section of soil property is sand base whaleback, Seepage problems is given prominence to, the dangerous situations such as during flood passage, infiltration often appears in embankment backwater toe, sand boils, piping.Though set up bedding before having taked dike, lead measures such as oozing draining after dike, do not reach Expected Results, dangerous situation still exists.Disclose according to geological drilling, detections of radar: levee body and elevation 10.9m ~ 4.0m manually pile and banket, elevation 0.9 ~-9.0m layer of sand, are the central core of circulation of seepage, and transmission coefficient is A × 10
-3cm/s.Adopt vertical film anti-permeation method of inserting to reinforce through the approval of committee in charge of harnessing Huai River of Ministry of Water Resources, complete mechanical vertical laying plastic film 12.6 ten thousand m altogether
2, artificial levee slope plastic film mulch 12.27 ten thousand m
2, the cubic metre of earth and stone 17.97 ten thousand m
3.
As Figure 1-3, vertical slotting film Seepage technical data is as follows:
(1) dividing elements: every 50m is divided into an element project;
(2) HDPE geomembrane quality: description meets designing requirement, without damaged, eye, transmission coefficient is less than design load; Its technical performance is as follows: fabric width selects 11.0m; Physical characteristic: weight per unit area G=200g/m
2, thickness=0.2mm; Mechanical characteristic: tensile strength>=0.1kN/5cm, tearing toughness>=0.08kN, elongation rate>=30%; Anti-permeability strength:>=100kpa; Transmission coefficient: K≤A × 10
-12cm/s;
(3) fluting axis and the degree of depth: meet design, construction requirement, groove depth is at 12m, and groove depth is greater than plastic film mulch degree of depth 1m, groove width 0.24m;
(4) joint treatment: sew up cigarette and be no less than 4 layers, lap length is no less than 3m, lays without obvious fold, laying quality is checked by excavation dell;
(5) backfill quality: closely knit, without conglomerate, stone, tree root, weeds etc.;
(6) degree of depth test stone: deviate is at measuring point >=97% of-50 ~+30cm, and+50cm measuring point is discontinuous, and count≤3%, superior in quality;-50 ~+30cm measuring point >=95% ,+50cm measuring point≤5%, up-to-standard;
(7) mechanical performance: fluting speed 3m/h, minimum face width 3m, min. turning radius 100m;
(8) construction organization: every machine-team need be constructed and administrative staff about 13 people for 6 hours; Wherein shovel native 2 people, plastic film mulch 5 people, draw 1 people, generate electricity 1 people, water pump 1 people, trench backfill 2 people, field control 1 people; Uninterruptedly construction in 24 hours, about needing 50 people altogether;
(9) quality examination: construction terminates rear employing test pit method and carries out detection examination; For grasping dam seepage line situation of change before and after slotting film, before construction, in the seepage section that 12km is long, burying 4 groups of piezometer tube underground, having laid respectively at Xinyi He Nandi, southern dike levee toe, bank, little Hebei, Yinan; After engineering completes, backwater toe and blue or green bank sand boil and bogginess phenomenon disappears, and seepage preventing effect is remarkable, and dangerous section is eliminated; Piezometric level situation of change lists in table 1, and draws phreatic line change sketch, sees Fig. 4.
Piezometric level before and after table 1 plastic film mulch
Claims (2)
1. vertical slotting film anti-permeation method, is characterized in that: the method is slotted to projected depth by chain type the trench saw, and be layed in groove by HDPE geomembrane and form vertical grouting curtain, concrete steps are as follows:
(1) place leveling: for ensureing that mechanical vertical laying plastic film reaches projected depth, place is roughly flattened;
(2) setting-out, equipment location, fluting: according to designing requirement, locating open groove center line position, placement devices, mechanical slotting; Adopt chain type the trench saw to scrape embankment undisturbed soil, cut, cut, take the soil body out of ground, form continuous deep trouth, groove depth at 10-14m, groove width 0.22-0.26m;
(3) slurry strengthened wall: in grooving process, adopt mud to support cell wall, in groove, mud liquid level and work plane remain basically stable simultaneously;
(4) bottom land height process control: groove depth is greater than plastic film mulch degree of depth 0.8-1m;
(5) HDPE geomembrane is laid: after groove reaches projected depth, vertical film bar is inserted volume to be had in the steel pipe of HDPE geomembrane, often roll up the long 50-60m of film, adopt crane to be inserted in groove by integral membrane volume, pull smoothly HDPE geomembrane expanded synchronous with the trench saw of film bar to form vertical grouting curtain in groove;
(6) trench backfill becomes wall: HDPE geomembrane bankets after laying in time, rapidly solidified one-tenth wall;
(7) quality examination: the step sequential production of above-mentioned 1-6 is until workshop section terminates; Construction terminates rear employing test pit method and carries out detection examination.
2. vertical slotting film anti-permeation method according to claim 1, it is characterized in that: when vertical laying plastic film, the connection between film volume adopts sewing or splicing processes to carry out joint process, and sew up cigarette and be no less than 4 layers, lap length is no less than 3m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510553686.1A CN105220701A (en) | 2015-09-02 | 2015-09-02 | Vertical slotting film anti-permeation method |
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| CN201510553686.1A CN105220701A (en) | 2015-09-02 | 2015-09-02 | Vertical slotting film anti-permeation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193079A (en) * | 2016-07-06 | 2016-12-07 | 天津中联格林科技发展有限公司 | The preparation method of GCL vertical impermeable wall |
| CN106320385A (en) * | 2016-10-17 | 2017-01-11 | 天津中联格林科技发展有限公司 | Vertical anti-seepage barrier and construction method thereof |
| CN107893424A (en) * | 2017-12-10 | 2018-04-10 | 成都隶盈科技有限公司 | A kind of construction method of the vertical water sealing structure of hydraulic engineering |
| CN108729460A (en) * | 2017-04-14 | 2018-11-02 | 神翼航空器科技（天津）有限公司 | The method of the soft waterproof of deep basal pit |
-
2015
- 2015-09-02 CN CN201510553686.1A patent/CN105220701A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 张怀俊，周亚军: ""机械垂直铺膜防渗施工技术质量控制要点"", 《水利建设与管理》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193079A (en) * | 2016-07-06 | 2016-12-07 | 天津中联格林科技发展有限公司 | The preparation method of GCL vertical impermeable wall |
| CN106320385A (en) * | 2016-10-17 | 2017-01-11 | 天津中联格林科技发展有限公司 | Vertical anti-seepage barrier and construction method thereof |
| CN108729460A (en) * | 2017-04-14 | 2018-11-02 | 神翼航空器科技（天津）有限公司 | The method of the soft waterproof of deep basal pit |
| CN107893424A (en) * | 2017-12-10 | 2018-04-10 | 成都隶盈科技有限公司 | A kind of construction method of the vertical water sealing structure of hydraulic engineering |
| CN107893424B (en) * | 2017-12-10 | 2020-04-21 | 宁波市水利水电规划设计研究院有限公司 | Construction method of vertical water stop structure of hydraulic engineering |
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