CN102587382B - Seepage-proofing grouting vibroflot and cofferdam construction process thereof - Google Patents
Seepage-proofing grouting vibroflot and cofferdam construction process thereof Download PDFInfo
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- CN102587382B CN102587382B CN201210098639.9A CN201210098639A CN102587382B CN 102587382 B CN102587382 B CN 102587382B CN 201210098639 A CN201210098639 A CN 201210098639A CN 102587382 B CN102587382 B CN 102587382B
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Abstract
The invention discloses a seepage-proofing grouting vibroflot and a cofferdam construction process of the seepage-proofing grouting vibroflot, and belongs to the technical field of construction machinery. The seepage-proofing grouting vibroflot comprises a shell, a grout pipe, a high-pressure air rubber pipe and a grout pipe rubber pipe, wherein an air pipe is arranged at one side of the shell, a through hole is formed at the upper part of the shell, an annular air slot is arranged in the lower part of the shell, a spraying opening is arranged at the annular air slot of the shell, the upper end of the air pipe is connected with an air nozzle by the through hole, the air nozzle is connected with the high-pressure air rubber pipe, and the lower end of the air pipe is communicated with the annular air slot. The cofferdam construction process comprises the steps of preparing a lifting device in place, lifting the seepage-proofing grouting vibroflot to align to a pile position, starting an air compressor for air supply, starting the seepage-proofing grouting vibroflot, feeding grout into the seepage-proofing grouting vibroflot through a grouting pump, and repeatedly injecting and lifting. According to the invention, the construction period is short, the cement consumption is reduced, the construction cost is low, construction materials are saved, the operation is simple, convenient and fast, the cement grout loss is reduced, and the downstream river pollution is reduced, and thus the method is more environment-friendly. The seepage-proofing grouting vibroflot can replace cofferdam high-pressure spraying grouting for seepage prevention.
Description
Technical field
The present invention relates to a kind of cofferdam construction device, especially vibrating impacter, belong to construction machinery technical field.
Background technology
In recent years, China's water resources and hydropower construction fast development, the quantity of building project and scale have reached unprecedented level.Small water conservancy hydroelectric pivotal project is also more and more, and a hydropower project is no matter large or small, the water conservancy diversion important step that is absolutely necessary, cofferdam is an one pith, seepage prevention of cofferdam success or not is directly connected to the smooth of construction of hydropower plant, cofferdam and seepage prevention of cofferdam engineering occupy critical role in construction of hydropower facilities engineering, are directly connected to progress and the investment of construction of hydropower facilities engineering.Seepage prevention of cofferdam construction, according to weir, cofferdam body and weir base overburden cover and stratum composition situation, conventional anti-permeation method mainly contains high pressure jet grouting, concrete cut, clay core wall, cement or clay cementation, self-solidifying mortar-trough, Sheet Pile Pouring Wall in Coal, anti-seepage geomembrane etc.Existing various technique is all comparatively ripe, but has limitation separately.
Summary of the invention
For the problems referred to above, the invention provides a kind of antiseepage grouting vibrating impacter that cofferdam is carried out to Seepage.
The technical solution adopted for the present invention to solve the technical problems is: antiseepage grouting vibrating impacter, comprises shell, slurry pipe, high pressure gas sebific duct, slurry pipe sebific duct; Shell one side is provided with tracheae, and shell upper is provided with through hole, is provided with annular gas tank in outer casing underpart; The annular gas tank place of shell is provided with spout; Tracheae upper end via through holes is connected with valve; Valve is connected with high pressure gas sebific duct; Tracheae lower end is communicated with annular gas tank.
Cofferdam construction technique, comprise the following steps: lifting appliance is in place, lifting antiseepage grouting vibrating impacter align piles position, start air compressor machine air-supply, opening power, start antiseepage grouting vibrating impacter, after antiseepage grouting vibrating impacter works well, grout pump is sent into slurries in gas slurry vibrating impacter, the injection of antiseepage grouting vibrating impacter, antiseepage grouting vibrating impacter is promoted, injection repeatedly, lifting, until design stake is dark again.
The invention has the beneficial effects as follows, the construction period is short, reduced cement consumption, and construction cost is low.Save construction material, simple and efficient to handle; Reduce cement grout and run off, reduce downstream river course and pollute, more environmental protection.Can replace cofferdam high pressure jet grouting antiseepage.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is Fig. 1 tracheae axis vertical cross section schematic diagram;
Fig. 3 is A-A sectional drawing of Fig. 1;
Fig. 4 is gas slurry vibrating impacter grouting water-tight Construction State schematic diagram.
Component and numbering in figure:
1-shell, 2-tracheae, 3-slurry pipe, 4-spout, 5-high pressure gas sebific duct,
6-slurry pipe sebific duct, 7-valve, 8-annular gas tank, 9-through hole, 10-antiseepage grouting vibrating impacter,
11-air compressor machine, 12-grout pump, 13-cofferdam, 14-lifting appliance, 15-power supply.
The specific embodiment
Below in conjunction with embodiment, the present invention is further described.
Referring to Fig. 1-3, antiseepage grouting vibrating impacter, comprises shell 1, slurry pipe 3, high pressure gas sebific duct 5, slurry pipe sebific duct 6; Shell 1 one sides are provided with tracheae 2, and shell 1 top is provided with through hole 9, and shell is provided with annular gas tank 8 in 1 bottom; Annular gas tank 8 places of shell 1 are provided with spout 4; Tracheae 2 upper end via through holes 9 are connected with valve 7; Valve 7 is connected with high pressure gas sebific duct 5; Tracheae 2 lower ends are communicated with annular gas tank 8.
Referring to Fig. 4, cofferdam construction technique, comprises the following steps:
A, levelling of the land, cofferdam 13 has been filled and has been carried out smooth to cofferdam 13 afterwards;
B, measurement unwrapping wire, measure unwrapping wire, determines cofferdam 13 antiseepage axis;
C, boring slip casting, lifting appliance 14 is in place, lifting antiseepage grouting vibrating impacter 10, align piles position, start air compressor machine 11, putting in blast, opening power 15, start antiseepage grouting vibrating impacter 10, after antiseepage grouting vibrating impacter 10 works well, grout pump 12 is sent into slurries in antiseepage grouting vibrating impacter 10, antiseepage grouting vibrating impacter 10 is with the injection that blows slowly of certain speed, every injection certain depth, antiseepage grouting vibrating impacter 10 is promoted to certain depth, slowly injection again, so repeatedly, until design stake is dark, reach design stake dark after, reach and encrypt after electric current at electric current, vibration staying certain hour, slowly upwards promote with certain speed again, until stake mouthful.Boring slip casting, lifting appliance is in place, lifting antiseepage grouting vibrating impacter 10, align piles position, start air compressor machine 11, putting in blast, start antiseepage grouting vibrating impacter 10, after gas slurry vibrating impacter works well, start to send into slurries in gas slurry vibrating impacter, antiseepage grouting vibrating impacter 10 is with the injection that blows slowly of certain speed, every injection certain depth, antiseepage grouting vibrating impacter 10 is promoted to certain depth, slowly injection again, so repeatedly, until design stake is dark, reach design stake dark after, reach and encrypt after electric current at electric current, vibration staying certain hour, slowly upwards promote with certain speed again, until stake mouthful.
D, repetition C step.
In A step, levelling of the land guarantees that lifting appliance 14 constructions have enough width and planeness.
In B step, measure unwrapping wire, determine cofferdam 13 antiseepage axis, and sign inserting mark stake position, guarantee that cofferdam 13 antiseepage axis are on a line.
The slip casting of holing in C step forms pile body.
In D step, repeat C step and form antiseepage curtain wall.
Engineering example:
The construction of two phases, first phase cofferdam design length 240m, stage II cofferdam design length 180m are divided in some hydropower station head pivot cofferdam.Head pivot dam foundation rock stratum comprises covering layer and basement rock two large divisions: the dam foundation covers bed thickness 31.4～35.15m, and point 8 substratums, are followed successively by 1. boulder bed, thick 3.85～6.35m, structure is slightly close, and bearing capacity of foundation soil is 0.48Mpa, 2. fine sand layer, thick 2.16～3.41m, loosely organized～slightly close, bearing capacity is 0.14MPa～0.28Mpa, 3. clay and farinose argillic horizon, thickness 8.94～12.67m, brown, loosely organized～slightly close, transmission coefficient 1.38 × 10
-4～1.59 × 10
-5cm/s, bearing capacity is 0.125Mpa, 4. clay folder macadam, there is exposure dam site upstream, 5.～7. boulder bed, this layer of bearing capacity of foundation soil is higher, 8. fine sand layer, thickness 3.14～6.55m, containing a small amount of ovum gravel, slightly close, bearing capacity of foundation soil is lower.The former scheme of seepage prevention of cofferdam is high pressure jet grouting, and first phase needs 40 days durations, and the second phase needs 30 days durations.Adopt afterwards gas slurry to shake and rushed grouting water-tight, actual first stage construction 9 days, Second Construction 6 days, the first phase second phase is saved 55 days durations altogether.Cost-saving 215.0479 ten thousand yuan, save 55 days durations, can increase by 690.0164 ten thousand yuan of the generating output values.
Claims (1)
1. an antiseepage grouting vibrating impacter, comprises shell (1), slurry pipe (3), high pressure gas sebific duct (5), slurry pipe sebific duct (6); It is characterized in that, shell (1) one side is provided with tracheae (2), and shell (1) top is provided with through hole (9), and shell (1) is provided with annular gas tank (8) in bottom; The annular gas tank (8) of shell (1) locates to be provided with spout (4); Tracheae (2) upper end via through holes (9) is connected with valve (7); Valve (7) is connected with high pressure gas sebific duct (5); Tracheae (2) lower end is communicated with annular gas tank (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210098639.9A CN102587382B (en) | 2012-04-05 | 2012-04-05 | Seepage-proofing grouting vibroflot and cofferdam construction process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210098639.9A CN102587382B (en) | 2012-04-05 | 2012-04-05 | Seepage-proofing grouting vibroflot and cofferdam construction process thereof |
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| CN102587382A CN102587382A (en) | 2012-07-18 |
| CN102587382B true CN102587382B (en) | 2014-07-02 |
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| CN104372788B (en) * | 2014-11-13 | 2016-03-23 | 中国水电基础局有限公司 | Vibro replacement stone column machine and construction method |
| CN110374095A (en) * | 2019-07-18 | 2019-10-25 | 广东厚普建设工程有限公司 | A kind of soft soil foundation compounding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1111229C (en) * | 1996-07-29 | 2003-06-11 | 四平东北岩土工程公司 | High-pressure spray process for swing-vibrated hole |
| FR2835857B1 (en) * | 2002-02-08 | 2004-09-17 | Carmine Trani | METHOD AND DEVICE FOR COMPACTING SOILS |
| CN1324200C (en) * | 2005-03-04 | 2007-07-04 | 赵延龙 | Seepage control consolidation method and apparatus for reciprocating high-pressure injection grouting foundation |
| CN202000330U (en) * | 2011-01-12 | 2011-10-05 | 北京长安光大机电设备有限公司 | Dry process vibroflot |
| CN202492849U (en) * | 2012-04-05 | 2012-10-17 | 中国水利水电第七工程局有限公司 | Anti-seepage grouting vibroflot |
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