CN105064366A - High-pressure jet grouting follow pipe structure in seepage prevention construction and construction method of high-pressure jet grouting follow pipe structure - Google Patents
High-pressure jet grouting follow pipe structure in seepage prevention construction and construction method of high-pressure jet grouting follow pipe structure Download PDFInfo
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- CN105064366A CN105064366A CN201510481404.1A CN201510481404A CN105064366A CN 105064366 A CN105064366 A CN 105064366A CN 201510481404 A CN201510481404 A CN 201510481404A CN 105064366 A CN105064366 A CN 105064366A
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Abstract
The invention discloses a high-pressure jet grouting follow pipe structure in seepage prevention construction and a construction method of the high-pressure jet grouting follow pipe structure, and belongs to the technical field of hydraulic and hydro-power engineering. The high-pressure jet grouting follow pipe structure comprises a coverage layer, a drilling hole and base rock. The coverage layer covers the base rock. The drilling hole is formed in the coverage layer. A PVC casing pipe is arranged in the drilling hole. Seepage prevention body construction is completed through the working procedures such as pipe preparation, drilling, cleaning and grouting. According to the technical scheme, the casing pipe made of common materials is adopted, and the casing pipe is likely to be broken due to the materials or the structure of the casing pipe; the casing pipe is directly broken and mixed with slurry during high-pressure jet grouting to become a part of a seepage prevention body, and a gapless continuous seepage prevention wall is formed. High-pressure jet grouting construction is convenient, the construction working procedures are decreased, and the construction efficiency is improved; a pipe casing of the structure is convenient to manufacture, the price is low, the formed seepage prevention body is good in structural integrality, and the seepage prevention effect is good.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering technical field, relate to a kind of high pressure phase equilibria seepage control technique, the high pressure phase equilibria especially related in a kind of Seepage follows tubular structure and construction method thereof.
Background technology
In hydraulic structure, often adopt high pressure phase equilibria method as the construction of impervious body in covering layer.Need there is not landslide with pipe to ensure that boring completes in hole when when cover-layer section is holed in high pressure phase equilibria, namely directly to follow up the pipeline made when holing, being supported by new borehole wall, to cave in the secondary drilling caused to prevent hole wall.Pipe of following generally during boring adopts plastics floral tube tube wall being evenly distributed with some through holes, when carrying out high pressure phase equilibria, slurries form impervious wall by the hole on floral tube at periphery, but due to the impact by grouting pressure, concentration of slurry and the factor such as floral tube hole density and size, this impervious wall molding effect is not good; Simultaneously higher with the quality requirement of pipe to this kind in construction, cause its material cost higher, and need reprocess according to field condition, make and comparatively bother.
Summary of the invention
In order to solve the problem, the high pressure phase equilibria that the invention provides in a kind of Seepage is followed tubular structure and construction method thereof, thus is reached convenient construction, the effect reduced costs.
The present invention is achieved by following technical solution.
High pressure phase equilibria in Seepage is with a tubular structure, and comprise covering layer, boring hole and basement rock, described covering layer is covered on basement rock, covering layer is offered boring hole, is provided with PVC sleeve pipe in described boring hole.
Described PVC sleeve pipe is light-wall pipe, and its shear strength is lower than the minimum spray pressure of high pressure phase equilibria.
Described PVC sleeve pipe tube wall is provided with crisscross dotted line seam.
Described PVC sleeve pipe tube wall is netted, its mesh gross area >=material gross area.
A high pressure phase equilibria construction method in Seepage, comprises the steps:
A. standby pipe: select shear strength lower than the PVC sleeve pipe of the minimum spray pressure of high pressure phase equilibria, or tube wall is netted PVC sleeve pipe, or tube wall is provided with the PVC sleeve pipe of crisscross dotted line seam, for subsequent use;
B. hole: in covering layer, carry out jet grouting boring, when holing, boring limit, limit is with pipe, follows up with pipe and boring simultaneously, effectively ensures the stable of in boring procedure hole wall, forms the boring hole of band PVC sleeve pipe;
C. clear up: complete boring and being finally in place of PVC sleeve pipe, clear up the rubble gravel produced in boring procedure;
D. be in the milk: by high-pressure grouting machine, high pressure phase equilibria carried out to boring hole, makes the slurry of high pressure direct impact failure low-intensity PVC sleeve pipe, until high pressure phase equilibria completes, finally form impervious body.
The invention has the beneficial effects as follows:
High pressure phase equilibria in a kind of Seepage of the present invention is with tubular structure and construction method thereof, by adopting the sleeve pipe of common material, the material of this sleeve pipe or structure make it easily broken, directly sleeve pipe smashed when high pressure phase equilibria and mix with slurry, become the part in impervious body, form nonseptate continuous impervious wall, high-pressure rotary-spray construction is convenient, decrease working procedure, improve efficiency of construction; And the pipe box of this structure is easy to make, cheap, the impervious body structural integrity of formation is good, and good seepage-proof property, has broad application prospects.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the overall structure schematic diagram after impervious body is formed;
Fig. 3 is the PVC sleeve structure schematic diagram with dotted line seam in the present invention;
Fig. 4 is PVC sleeve structure schematic diagram netted in the present invention.
In figure: 1-covering layer, 2-holes hole, 3-PVC sleeve pipe, 4-basement rock, 5-impervious body.
Detailed description of the invention
Technical scheme of the present invention is further described below in conjunction with accompanying drawing, but described in claimed scope is not limited to.
Embodiment one
As shown in Figure 1 and Figure 2, high pressure phase equilibria in a kind of Seepage of the present invention is with tubular structure, and comprise covering layer 1, boring hole 2 and basement rock 4, described covering layer 1 is covered on basement rock 4, covering layer 1 is offered boring hole 2, in described boring hole 2, be provided with PVC sleeve pipe 3.
Described PVC sleeve pipe 3 is light-wall pipe, and its shear strength is lower than the minimum spray pressure of high pressure phase equilibria.
A high pressure phase equilibria construction method in Seepage, comprises the steps:
A. standby pipe: select shear strength lower than the PVC sleeve pipe 3 of the minimum spray pressure of high pressure phase equilibria, for subsequent use;
B. hole: in covering layer, carry out jet grouting boring, when holing, boring limit, limit is with pipe, follows up with pipe and boring simultaneously, effectively ensures the stable of in boring procedure hole wall, forms the boring hole 2 of band PVC sleeve pipe 3;
C. clear up: complete boring and being finally in place of PVC sleeve pipe 3, clear up the rubble gravel produced in boring procedure;
D. be in the milk: described PVC sleeve pipe 3 is not extracted, pass through high-pressure grouting machine, high pressure phase equilibria is carried out to boring hole 2, make the slurry of high pressure direct impact failure low-intensity PVC sleeve pipe 3, make PVC sleeve pipe 3 broken in boring hole 2, mix with slurry, until high pressure phase equilibria completes, final formation impervious body 5.
Embodiment two
As shown in Figure 1, Figure 2, Figure 3 shows, high pressure phase equilibria in Seepage is with a tubular structure, and comprise covering layer 1, boring hole 2 and basement rock 4, described covering layer 1 is covered on basement rock 4, covering layer 1 is offered boring hole 2, in described boring hole 2, be provided with PVC sleeve pipe 3.
Described PVC sleeve pipe 3 tube wall is provided with crisscross dotted line seam.
A high pressure phase equilibria construction method in Seepage, comprises the steps:
A. standby pipe: select tube wall to be provided with the PVC sleeve pipe 3 of crisscross dotted line seam, for subsequent use;
B. hole: in covering layer, carry out jet grouting boring, when holing, boring limit, limit is with pipe, follows up with pipe and boring simultaneously, effectively ensures the stable of in boring procedure hole wall, forms the boring hole 2 of band PVC sleeve pipe 3;
C. clear up: complete boring and being finally in place of PVC sleeve pipe 3, clear up the rubble gravel produced in boring procedure;
D. be in the milk: described PVC sleeve pipe 3 is not extracted, pass through high-pressure grouting machine, high pressure phase equilibria is carried out to boring hole 2, make the PVC sleeve pipe 3 that the slurry of high pressure direct impact failure band dotted line stitches, PVC sleeve pipe 3, by slurry impact, is broken into fragment from dotted line seam, with slurry Homogeneous phase mixing, until high pressure phase equilibria completes, the final impervious body 5 forming entirety.
Embodiment three
High pressure phase equilibria in Seepage is with a tubular structure, and comprise covering layer 1, boring hole 2 and basement rock 4, described covering layer 1 is covered on basement rock 4, covering layer 1 is offered boring hole 2, is provided with PVC sleeve pipe 3 in described boring hole 2.
Described PVC sleeve pipe 3 tube wall is netted, its mesh gross area >=material gross area.
A high pressure phase equilibria construction method in Seepage, comprises the steps:
A. standby pipe: select tube wall to be netted PVC sleeve pipe 3, for subsequent use;
B. hole: in covering layer, carry out jet grouting boring, when holing, boring limit, limit is with pipe, follows up with pipe and boring simultaneously, effectively ensures the stable of in boring procedure hole wall, forms the boring hole 2 of band PVC sleeve pipe 3;
C. clear up: complete boring and being finally in place of PVC sleeve pipe 3, clear up the rubble gravel produced in boring procedure;
D. be in the milk: described PVC sleeve pipe 3 is not extracted, pass through high-pressure grouting machine, high pressure phase equilibria is carried out to boring hole 2, make the cancellated PVC sleeve pipe 3 of the direct impact failure of the slurry of high pressure, high-pressure slurry is by netted PVC sleeve pipe 3 impact grinding, mix with slurry, until high pressure phase equilibria completes, final formation impervious body 5.
The material shear strength of described PVC sleeve pipe 3 is about 0.2 ~ 0.4MPa, need be less than the minimal impact pressure of jet grouting, the pressure slurry direct electrical breakdown PVC sleeve pipe 3 when jet grouting, forms continuous print impervious body 5.
High pressure phase equilibria is used for the impervious body of cover-layer section, and high pressure phase equilibria is holed with managing that do not adopt price higher or that making is comparatively loaded down with trivial details floral tube, and the PVC material adopting price lower, and will not reclaim, reduce working procedure, reduce construction costs.Adopt the protective effect that the PVC sleeve pipe 3 of this structure can well ensure to hole wall in boring procedure, its effect is compared with the better effects if of floral tube; Adopt the PVC sleeve pipe 3 of this structure when high pressure phase equilibria, directly can destroy PVC sleeve pipe 3 and form nonseptate continuous print impervious body 5, impervious body 5 molding effect is better, and construct more convenient, efficiency is higher simultaneously.
Claims (5)
1. the high pressure phase equilibria in a Seepage is with tubular structure, comprise covering layer (1), boring hole (2) and basement rock (4), described covering layer (1) is covered on basement rock (4), covering layer (1) is offered boring hole (2), it is characterized in that: in described boring hole (2), be provided with PVC sleeve pipe (3).
2. the high pressure phase equilibria in a kind of Seepage according to claim 1, with tubular structure, is characterized in that: described PVC sleeve pipe (3) is light-wall pipe, and its shear strength is lower than the minimum spray pressure of high pressure phase equilibria.
3. the high pressure phase equilibria in a kind of Seepage according to claim 1, with tubular structure, is characterized in that: described PVC sleeve pipe (3) tube wall is provided with crisscross dotted line seam.
4. the high pressure phase equilibria in a kind of Seepage according to claim 1, with tubular structure, is characterized in that: described PVC sleeve pipe (3) tube wall is netted, its mesh gross area >=material gross area.
5. the high pressure phase equilibria construction method in Seepage, is characterized in that:
Comprise the steps:
A. standby pipe: select shear strength lower than the PVC sleeve pipe (3) of the minimum spray pressure of high pressure phase equilibria, or tube wall is netted PVC sleeve pipe (3), or tube wall is provided with the PVC sleeve pipe (3) of crisscross dotted line seam, for subsequent use;
B. hole: in covering layer, carry out jet grouting boring, when holing, boring limit, limit is with pipe, follows up with pipe and boring simultaneously, effectively ensures the stable of in boring procedure hole wall, forms the boring hole (2) of band PVC sleeve pipe (3);
C. clear up: complete boring and being finally in place of PVC sleeve pipe (3), clear up the rubble gravel produced in boring procedure;
D. be in the milk: pass through high-pressure grouting machine, high pressure phase equilibria is carried out to boring hole (2), make the slurry of high pressure direct impact failure low-intensity PVC sleeve pipe (3), until high pressure phase equilibria completes, finally form impervious body (5).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087994A (en) * | 2016-08-25 | 2016-11-09 | 中国水利水电第四工程局有限公司 | A kind of high pressure jet grouting pore-forming dado structure and construction method thereof |
| CN112796296A (en) * | 2020-12-29 | 2021-05-14 | 中铁十二局集团第七工程有限公司 | High-pressure rotary spraying combined PVC sleeve retaining wall earth surface reinforcing construction method |
| CN116290123A (en) * | 2023-05-17 | 2023-06-23 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Device and method for preventing soil layer above bedrock hole from collapsing |
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| CN1222613A (en) * | 1998-07-14 | 1999-07-14 | 陆建衡 | Steel and plastic pipe pressure deposition design and construction method for the foundation of building |
| CN104196041A (en) * | 2014-08-09 | 2014-12-10 | 葛洲坝集团基础工程有限公司 | Construction method for concrete diaphragm wall cofferdam heightening |
| CN204898678U (en) * | 2015-08-03 | 2015-12-23 | 中国电建集团贵阳勘测设计研究院有限公司 | High pressure jet grout in prevention of seepage construction is with tubular construction |
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2015
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| CN1222613A (en) * | 1998-07-14 | 1999-07-14 | 陆建衡 | Steel and plastic pipe pressure deposition design and construction method for the foundation of building |
| CN104196041A (en) * | 2014-08-09 | 2014-12-10 | 葛洲坝集团基础工程有限公司 | Construction method for concrete diaphragm wall cofferdam heightening |
| CN204898678U (en) * | 2015-08-03 | 2015-12-23 | 中国电建集团贵阳勘测设计研究院有限公司 | High pressure jet grout in prevention of seepage construction is with tubular construction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087994A (en) * | 2016-08-25 | 2016-11-09 | 中国水利水电第四工程局有限公司 | A kind of high pressure jet grouting pore-forming dado structure and construction method thereof |
| CN112796296A (en) * | 2020-12-29 | 2021-05-14 | 中铁十二局集团第七工程有限公司 | High-pressure rotary spraying combined PVC sleeve retaining wall earth surface reinforcing construction method |
| CN116290123A (en) * | 2023-05-17 | 2023-06-23 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Device and method for preventing soil layer above bedrock hole from collapsing |
| CN116290123B (en) * | 2023-05-17 | 2023-08-04 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Device and method for preventing soil layer above bedrock hole from collapsing |
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Application publication date: 20151118 |
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