CN107780405B - Quickly search and repair the method that film air leakage point is sealed in vacuum precompressed soft foundation processing - Google Patents
Quickly search and repair the method that film air leakage point is sealed in vacuum precompressed soft foundation processing Download PDFInfo
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- CN107780405B CN107780405B CN201610726370.2A CN201610726370A CN107780405B CN 107780405 B CN107780405 B CN 107780405B CN 201610726370 A CN201610726370 A CN 201610726370A CN 107780405 B CN107780405 B CN 107780405B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Specifically a kind of quick lookup of the present invention and the method for repairing sealing film gas leakage in vacuum precompressed soft foundation processing；It is characterized in that: including in the region division suspicion area that sealing film gas leakage occurs, by medium coarse sand cushion thickness on the film in suspicion area clearly to a small foundation pit is formed, the medium coarse sand cleared out, naturally at dam, places mark post in middle position, pour water into foundation pit in suspicion area surrounding；It after the water surface is tranquil, is observed, if the discovery water surface has bubble emersion or forms small whirlpool, and water level decreasing in the unit time, then can determine that there is sealing film breaking point in the suspicion area, damage location is bubble emersion or the position for forming small whirlpool；Leak source repairs damaged part after finding.The present invention can quickly and accurately search sealing film leak source position by observation using the principle vacuumized, meanwhile, sealing film breakage hole can effectively, be thoroughly repaired after finding damaged part, it is ensured that vacuumize the construction quality in region.
Description
Technical field
The present invention relates to building foundation engineering construction field, at specifically a kind of quick lookup and reparation vacuum precompressed soft foundation
The method of film gas leakage is sealed in reason.
Background technique
In Pearl River Delta area, the original geology and geomorphology situation of construction project is poor, mostly sea-land interbedding facies alluvial plain, fish pond
It gathers with apron beach, predominantly the strands such as mud, cohesive soil and sandy soils type soft soil foundation, water content is big, compressibility
High, low bearing capacity, so usually carrying out basement process using vacuum preloading construction technique makes soil body compression and enhanced strength, with full
Sufficient design requirement.
It the quality of vacuumizing effect or not is always the emphasis in vacuum preloading construction technique, and after sealing film generation gas leakage
Lookup for leak source is difficult point therein again.Due to the particularity of vacuum preloading technique, in sand laying construction on carrying out film,
It is mechanical walk back and forth, manually carried out between leveling operation, sealing film and geotextiles using spade or sealing film and sealing film it
Between be mingled with stone, all may damage sealing film causes vacuum system to fail.When searching leak source, due to vacuumizing construction area pole
Extensively, it and is not available mechanical equipment and is searched, dig investigation so need to additionally put into a large amount of manpowers and carry out blanket types, expend greatly
It after the amount time finds out leak source, and is not thorough due to repairing, so that damaged area is chronically at film and pushes hypodynamic state, no
But the construction effect of vacuum preloading technique is greatly reduced, and constrains the duration, and substantially increase construction cost.
Summary of the invention
The object of the present invention is to provide a kind of simple process, easy to operate, time-saving and efficiency, can efficiently and quickly locate
The operational method of reason sealing film gas leakage.
In order to achieve the above object, the present invention is implemented as follows:
A kind of quick lookup and the method that film gas leakage is sealed in vacuum precompressed soft foundation processing is repaired, including
Step 1, the region that film gas leakage is sealed in generation, find pressure gauge under the film of pressure index decline, are monitored model
It encloses and is divided into several suspicion areas, each suspicion area side length is no more than 20m；
Step 2, the method using manual cleaning, extremely remaining clearly 10 by medium coarse sand cushion thickness on the film in suspicion area~
20cm forms a small foundation pit, and to ensure the accuracy measured, the substrate after cleaning should be smooth as far as possible, avoids the occurrence of the gradient, clearly
For medium coarse sand out in suspicion area surrounding naturally at dam, height of dam about 50cm can optionally mix appropriate silt to reinforce its impermeability
Mud；
Step 3 places a mark post with a scale in small foundation pit middle position, for reading the data of water level decreasing, so
It pours water afterwards into small foundation pit；
Step 4, after the water surface calms down, start to be observed, if the discovery water surface has bubble emersion or forms small whirlpool,
And water level decreasing in the unit time, then it can determine that there is sealing film breaking point in the suspicion area, damage location is bubble emersion or formation
The position of small whirlpool；
When step 5, leak source repair damaged part after finding, handled in two kinds of situation,
Step 5.1, when damaged dimension of opening be less than 10mm × 10mm when, be made with the two-sided foam tape of EVA with geotextiles
The repairing of sizing is pasted, and after finding out damaged hole, is directly sticked sizing repairing and is pasted and compress it；
Step 5.2, when damaged dimension of opening is greater than 10mm × 10mm, be cut out the sealing film more bigger than dimension of opening and
Geotextiles recycle sealing film repair sheets to be bonded the sealing film for being used to repair, geotextiles and damaged sealing film i.e.
It can.
The present invention is using the principle that vacuumizes, if suspicion area, there are leak source, the water level in range can decline, and leak source
Position has bubble or small-sized whirlpool generates, and by observation, can quickly and accurately search sealing film leak source position, meanwhile, it is looking into
Sealing film breakage hole can effectively, be thoroughly repaired after damaged part out, it is ensured that vacuumize the construction quality in region.
Detailed description of the invention
Fig. 1 is present invention construction schematic diagram one.
Fig. 2 is present invention construction cross-section diagram one.
Fig. 3 is single suspect region partial enlarged view.
Specific embodiment
The present invention is further illustrated below by way of specific embodiment.
As shown in Figure 1, Figure 2 and Figure 3, a kind of quick lookup and repair vacuum precompressed soft foundation processing in seal film gas leakage side
Method, including
Step 1, the region that film gas leakage is sealed in generation, find pressure gauge 1 under the film of pressure index decline, are monitored model
It encloses and is divided into several suspicion areas, each suspicion area side length is no more than 20m；
Step 2, the method using manual cleaning, extremely remaining clearly 10 by the thickness of medium coarse sand bed course 4 on the film in suspicion area~
20cm forms a small foundation pit, and to ensure the accuracy measured, the substrate after cleaning should be smooth as far as possible, avoids the occurrence of the gradient, clearly
In suspicion area surrounding naturally at dam 2, the high about 50cm in dam 2 can be mixed optionally appropriate medium coarse sand out to reinforce its impermeability
Mud；
Step 3 places a mark post 3 with a scale in small foundation pit middle position, for reading the data of water level decreasing, so
It pours water afterwards into small foundation pit；
Step 4, after the water surface calms down, start to be observed, if the discovery water surface has bubble emersion or forms small whirlpool,
And water level decreasing in the unit time, then it can determine that there is sealing film breaking point in the suspicion area, damage location is bubble emersion or formation
The position of small whirlpool；
When step 5, leak source repair damaged part after finding, handled in two kinds of situation,
Step 5.1, when damaged dimension of opening be less than 10mm × 10mm when, be made with the two-sided foam tape of EVA with geotextiles
The repairing of sizing is pasted, and after finding out damaged hole, is directly sticked sizing repairing and is pasted and compress it；
Step 5.2, when damaged dimension of opening is greater than 10mm × 10mm, be cut out the sealing film more bigger than dimension of opening and
Geotextiles recycle sealing film repair sheets to be bonded the sealing film for being used to repair, geotextiles and damaged sealing film i.e.
It can.
The present invention is using the principle that vacuumizes, if suspicion area, there are leak source, the water level in range can decline, and leak source
Position has bubble or small-sized whirlpool generates, and by observation, can quickly and accurately search sealing film leak source position, meanwhile, it is looking into
Sealing film breakage hole can effectively, be thoroughly repaired after damaged part out, it is ensured that vacuumize the construction quality in region.
Claims (1)
1. a kind of quickly search and repair the method for sealing film air leakage point in vacuum precompressed soft foundation processing, it is characterized in that: including
Step 1, the region that film gas leakage is sealed in generation, find pressure gauge under the film of pressure index decline, its monitoring range are drawn
It is divided into several suspicion areas, each suspicion area side length is no more than 20m；
Step 2, the method using manual cleaning, by medium coarse sand cushion thickness on the film in suspicion area clearly to 10~20cm of residue, shape
At a small foundation pit, to ensure the accuracy measured, the substrate after cleaning should be smooth as far as possible, avoids the occurrence of the gradient, clears out
For coarse sand in suspicion area surrounding naturally at dam, 30 ~ 50cm of height of dam mixes mud into medium coarse sand for the impermeability for reinforcing dam body；
Step 3 places a mark post with a scale in small foundation pit middle position, then past for reading the data of water level decreasing
It pours water in small foundation pit；
Step 4, after the water surface calms down, start to be observed, if the discovery water surface has bubble emersion or forms small whirlpool, and single
Water level decreasing in the time of position then can determine that there is sealing film breaking point in the suspicion area, and damage location is bubble emersion or the small whirlpool of formation
The position in whirlpool；
When step 5, leak source repair damaged part after finding, handled in two kinds of situation,
Step 5.1, when damaged dimension of opening is less than 10mm × 10mm, sizing is made with the two-sided foam tape of EVA and geotextiles
Repairing patch, after finding out damaged hole, directly stick sizing repairing paste and compress it；
Step 5.2, when damaged dimension of opening be greater than 10mm × 10mm when, be cut out the sealing film and geotechnique more bigger than dimension of opening
Cloth recycles sealing film repair sheets to be bonded the sealing film for being used to repair, geotextiles and damaged sealing film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610726370.2A CN107780405B (en) | 2016-08-26 | 2016-08-26 | Quickly search and repair the method that film air leakage point is sealed in vacuum precompressed soft foundation processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610726370.2A CN107780405B (en) | 2016-08-26 | 2016-08-26 | Quickly search and repair the method that film air leakage point is sealed in vacuum precompressed soft foundation processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107780405A CN107780405A (en) | 2018-03-09 |
| CN107780405B true CN107780405B (en) | 2019-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610726370.2A Active CN107780405B (en) | 2016-08-26 | 2016-08-26 | Quickly search and repair the method that film air leakage point is sealed in vacuum precompressed soft foundation processing |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706913B (en) * | 2019-01-18 | 2020-10-23 | 广东交通职业技术学院 | Foundation treatment method based on vacuum and stacking combined preloading method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144706A (en) * | 1998-11-06 | 2000-05-26 | Maruyama Kogyo Kk | Soft ground stabilization |
| CN102323002A (en) * | 2011-08-12 | 2012-01-18 | 天津二十冶建设有限公司 | Combined vacuum and surcharge preloading diaphragm seal internal pressure automatic alarm system |
| CN105002937A (en) * | 2015-06-30 | 2015-10-28 | 中国二十冶集团有限公司 | Damage finding device for vacuum-surcharge preloading sealing membrane |
-
2016
- 2016-08-26 CN CN201610726370.2A patent/CN107780405B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144706A (en) * | 1998-11-06 | 2000-05-26 | Maruyama Kogyo Kk | Soft ground stabilization |
| CN102323002A (en) * | 2011-08-12 | 2012-01-18 | 天津二十冶建设有限公司 | Combined vacuum and surcharge preloading diaphragm seal internal pressure automatic alarm system |
| CN105002937A (en) * | 2015-06-30 | 2015-10-28 | 中国二十冶集团有限公司 | Damage finding device for vacuum-surcharge preloading sealing membrane |
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| CN107780405A (en) | 2018-03-09 |
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