CN104032761A - Combined dewatering and drainage method for high-moisture-content soft soil foundations close to rivers and seas - Google Patents
Combined dewatering and drainage method for high-moisture-content soft soil foundations close to rivers and seas Download PDFInfo
- Publication number
- CN104032761A CN104032761A CN201410163581.0A CN201410163581A CN104032761A CN 104032761 A CN104032761 A CN 104032761A CN 201410163581 A CN201410163581 A CN 201410163581A CN 104032761 A CN104032761 A CN 104032761A
- Authority
- CN
- China
- Prior art keywords
- moisture
- construction
- dewatering
- soft soil
- river
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a combined dewatering and drainage method for high-moisture-content soft soil foundations close to rivers and seas. According the combined dewatering and drainage method, water blocking, draining and dewatering are combined to lower the underground water levels in the high-moisture-content soft soil foundations close to rivers and seas. The combined dewatering and drainage method includes: arranging draining ditches around every construction subarea, mounting powerful draining pumps in the open ditches and arranging one water collecting well for every 40m, wherein the open ditches are required to be enclosed and 2.0m in depth; arranging blind ditches in each construction subarea, wherein the blind ditches are spaced by 20m and distributed in the middle of two rows of light well points. The combined dewatering and drainage method has the advantage that the difficulty brought to drainage by rich underground fed water for the high-moisture-content soft soil foundations close to rivers and seas is overcome, the soil layer is serious in horizontal stratification and has interlayers in partial areas, perpendicular permeability of shallow soil of the high-moisture-content soft soil foundations is poor, and drainage effect and construction effect of shallow layers are seriously affected, and water levels for the shallow levels of the high-moisture-content soft soil foundations can be quickly and efficiently lowered, soil in the shallow levels can be solidified, and thereby bearing capacity of the foundations is improved and requirements on follow-up construction are met.
Description
Technical field
The present invention relates to the soft foundation that a kind of building operations uses and fall water discharge method, especially one is closed on sea, river high-moisture percentage soft foundation combined type and is fallen water discharge method.
Background technology
The soil layer that closes on river, sea is substantially all soft layer, and moisture content is high, groundwater recharge is abundant.This kind of soil layer deposited by sand mud mostly or artificial hydraulic reclamation forms, and horizontal slice is serious, and subregion exists interlayer, causes the vertical permeability of shallow soil poor, because shallow-layer soil moisture content is especially high, brings very large impact to dewatering effect and the work efficiency of shallow-layer.And this kind of soft layer is substantially in soft-plastic state, bearing capacity of foundation soil deficiency, when plant equipment enters this soft layer that closes on river, sea while constructing, the soil body is distortion fast, cause associated machines sinking " to fall into car ", cannot carry out follow-up construction, must effectively reduce its groundwater table, the follow-up construction of guarantee smoothly.Based on its unique soil layer geology characteristic, traditional single drainage pattern that falls is difficult to meet the demands.
Summary of the invention
The present invention will solve high-moisture percentage soft foundation to close on river sea groundwater recharge and enrich to falling draining and bring difficulty, and this kind of solum horizontal layering is serious, there is interlayer in subregion, cause the vertical permeability of shallow soil poor, bring the problem of very large impact to dewatering effect and the work efficiency of shallow-layer, can rapidly and efficiently reduce the shallow-layer water level of coastal waters, nearly river soft foundation, fall water discharge method and provide one to close on sea, river high-moisture percentage soft foundation combined type.
For achieving the above object, technical scheme of the present invention is: one is closed on river sea high-moisture percentage soft foundation combined type and fallen water discharge method, it is characterized in that: the method adopts water blockoff, draining, three kinds of modes of precipitation to combine to reduce the groundwater table in the soft foundation of coastal waters, nearly river high-moisture percentage.
Draining concrete grammar:
(1) around each construction subregion, open drain be set and lay forced-ventilated water pump, open drain requires to seal, and open drain degree of depth 2.0m, arranges a collecting well at interval of 40m;
(2) in each construction subregion, weeper drain is set, french drain spacing 20m, is arranged in the middle of two row's light well points, avoid causing well point gas leakage, french drain adopts inverted trapezoidal section, degree of depth 1.5m, lay geotextiles along section, the inner rubble of filling, french drain two ends are connected with the open drain of subregion surrounding.
Water blockoff concrete grammar: near the position in river course and marine site, two row's light well points are set and do bustle pipe, and at each construction subregion periphery, one row's light well point is set and does bustle pipe.
Precipitation concrete grammar: the light well point that depth duct ligation closes is set in each subregion and carries out vacuum-dewatering, well point row's spacing 20m, same position arranges respectively the dark and dark well-point pipe of 6m of a row 4m.
The invention has the beneficial effects as follows: the present invention can effectively solve high-moisture percentage soft foundation and close on river sea groundwater recharge and enrich to falling draining and bring difficulty, and this kind of solum horizontal layering is serious, there is interlayer in subregion, cause the vertical permeability of shallow soil poor, bring the problem of very large impact to dewatering effect and the work efficiency of shallow-layer, can rapidly and efficiently reduce the shallow-layer water level of coastal waters, nearly river soft foundation, shallow soil is able to fixed, effectively raise bearing capacity of foundation soil, and then meet follow-up construction needs.
Detailed description of the invention
Below in conjunction with concrete embodiment, further set forth the present invention.Should be understood that these embodiments are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
One is closed on river sea high-moisture percentage soft foundation combined type and is fallen water discharge method, specifically comprises: this combined type falls water discharge method and combined to reduce the groundwater table in the soft foundation of coastal waters, nearly river high-moisture percentage by water blockoff, draining, three kinds of modes of precipitation.Around each construction subregion, open drain be set and lay forced-ventilated water pump, stoping the shallow seated groundwater supply construction area in 1.5m depth bounds.Open drain requires to seal, open drain degree of depth 2.0m, arranges a collecting well at interval of 40m, and at each construction subregion periphery, 1 row's light well point is set and does bustle pipe, near the position in river course and marine site, two row's light well points are set and do bustle pipe, stop slightly dark shallow seated groundwater supply construction area.
In each construction subregion, weeper drain is set, french drain spacing 20m, is arranged in the middle of two row's light well points, avoids causing well point gas leakage.French drain adopts inverted trapezoidal section, and degree of depth 1.5m lays geotextiles along section, the inner rubble of filling, and french drain two ends are connected with the open drain of subregion surrounding.The light well point that depth duct ligation closes is set in each subregion and carries out vacuum-dewatering, well point row's spacing 20m, same position arranges respectively the dark and dark well-point pipe of 6m of 1 row 4m,, effectively solved solum horizontal layering and vertical poor permeability adverse effect.
Application implementation example of the present invention:
Shanghai engineering ground area 160000m2, is located in the estuary southeast, Yangtze River Delta leading edge, is that the Changjiang river silt is subject to the East Sea beach that becomes silted up and form, earth's surface is taking beach, discarded fish pond and wasteland as main, and close on Sui Tanghe and the East Sea, in, mud and ponding are more, and groundwater recharge is abundant.This project need to adopt impact-rolling technique to carry out ground processing, and by impact-rolling construction process requirement, groundwater table need be reduced to below ground 5.0m before impact-rolling.The sand alluvial of shallow-layer soil series sea, this engineering construction district and artificial hydraulic reclamation form, and horizontal slice is serious, and subregion exists interlayer, causes the vertical permeability of shallow soil poor, has a strong impact on the effect of shallow-layer precipitation in place.
Adopt combined type of the present invention to fall water discharge method and carry out precipitation before place ground is processed, obtained good effect, in two weeks, water level obviously declines, be reduced to below ground 5m, shallow soil is able to fixed, effectively raises bearing capacity of foundation soil, has met follow-up Foundation Treatment needs.
Claims (4)
1. close on river sea high-moisture percentage soft foundation combined type and fall a water discharge method, it is characterized in that: the method adopts water blockoff, draining, three kinds of modes of precipitation to combine to reduce the groundwater table in the soft foundation of coastal waters, nearly river high-moisture percentage.
2. water discharge method falls in sea, the river high-moisture percentage soft foundation combined type that closes on according to claim 1, it is characterized in that: described draining concrete grammar:
(1) around each construction subregion, open drain be set and lay forced-ventilated water pump, open drain requires to seal, and open drain degree of depth 2.0m, arranges a collecting well at interval of 40m;
(2) in each construction subregion, weeper drain is set, french drain spacing 20m, is arranged in the middle of two row's light well points, avoid causing well point gas leakage, french drain adopts inverted trapezoidal section, degree of depth 1.5m, lay geotextiles along section, the inner rubble of filling, french drain two ends are connected with the open drain of subregion surrounding.
3. water discharge method falls in sea, the river high-moisture percentage soft foundation combined type that closes on according to claim 1, it is characterized in that: described water blockoff concrete grammar: near the position in river course and marine site, two row's light well points are set and do bustle pipe, and at each construction subregion periphery, one row's light well point is set and does bustle pipe.
4. water discharge method falls in sea, the river high-moisture percentage soft foundation combined type that closes on according to claim 1, it is characterized in that: described precipitation concrete grammar: the light well point that depth duct ligation closes is set in each subregion and carries out vacuum-dewatering, well point row's spacing 20m, same position arranges respectively a row 4m deeply and the dark well-point pipe of 6m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163581.0A CN104032761A (en) | 2014-04-23 | 2014-04-23 | Combined dewatering and drainage method for high-moisture-content soft soil foundations close to rivers and seas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163581.0A CN104032761A (en) | 2014-04-23 | 2014-04-23 | Combined dewatering and drainage method for high-moisture-content soft soil foundations close to rivers and seas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104032761A true CN104032761A (en) | 2014-09-10 |
Family
ID=51463738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410163581.0A Pending CN104032761A (en) | 2014-04-23 | 2014-04-23 | Combined dewatering and drainage method for high-moisture-content soft soil foundations close to rivers and seas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104032761A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631426A (en) * | 2014-12-26 | 2015-05-20 | 浙江省水利水电勘测设计院 | Pretreatment method of coastal soft foundation water gate pile foundation |
| CN110230312A (en) * | 2018-03-06 | 2019-09-13 | 上海港湾基础建设（集团）股份有限公司 | Waterproof solidified earth method for processing foundation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07247551A (en) * | 1994-03-12 | 1995-09-26 | Shimizu Corp | Method of excavating high water level ground with impermeable bed |
| CN101148886A (en) * | 2007-11-13 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Drainage treatment structure for unbuilt or abuilding landfill slope underground water |
| CN101148885A (en) * | 2007-11-07 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Stereo drainage system structure for landfill underground water |
| CN102787614A (en) * | 2012-08-31 | 2012-11-21 | 黄河勘测规划设计有限公司 | Drainage structure of excavation slope of plunge pool |
| CN203429651U (en) * | 2013-08-27 | 2014-02-12 | 中铁十八局集团有限公司 | Ultra-large type deep foundation pit drainage system applied to littoral facies geological stratification area |
-
2014
- 2014-04-23 CN CN201410163581.0A patent/CN104032761A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07247551A (en) * | 1994-03-12 | 1995-09-26 | Shimizu Corp | Method of excavating high water level ground with impermeable bed |
| CN101148885A (en) * | 2007-11-07 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Stereo drainage system structure for landfill underground water |
| CN101148886A (en) * | 2007-11-13 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Drainage treatment structure for unbuilt or abuilding landfill slope underground water |
| CN102787614A (en) * | 2012-08-31 | 2012-11-21 | 黄河勘测规划设计有限公司 | Drainage structure of excavation slope of plunge pool |
| CN203429651U (en) * | 2013-08-27 | 2014-02-12 | 中铁十八局集团有限公司 | Ultra-large type deep foundation pit drainage system applied to littoral facies geological stratification area |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631426A (en) * | 2014-12-26 | 2015-05-20 | 浙江省水利水电勘测设计院 | Pretreatment method of coastal soft foundation water gate pile foundation |
| CN110230312A (en) * | 2018-03-06 | 2019-09-13 | 上海港湾基础建设（集团）股份有限公司 | Waterproof solidified earth method for processing foundation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103031836B (en) | A kind of method of building road on new hydraulically filled sludge ground fast | |
| CN109056694B (en) | Method for treating dredger fill through combination of shearing pressurization and vacuum preloading | |
| CN103225306B (en) | Method of preventing foundation pit leakage during excavation of foundation pit close to water source | |
| CN105544576A (en) | Foundation ditch dewatering and drainage excavation structure and application method | |
| CN104314090A (en) | Deep foundation pit bedrock drainage culvert and drainage system and drainage construction method thereof | |
| CN204370458U (en) | A kind of open-cut foundation ditch dewatering installation | |
| CN202202311U (en) | Superposed drainage and waterlogging-reduction structure for farmland | |
| CN110984200B (en) | Method for draining water of foundation pit of binary geological structure layer | |
| CN205116247U (en) | Water conservancy is towards heavy well construction equipment | |
| CN105112652B (en) | A kind of rare earth ore in-situ leaching disposing mother liquor canal body structure | |
| CN105220701A (en) | Vertical slotting film anti-permeation method | |
| CN104032761A (en) | Combined dewatering and drainage method for high-moisture-content soft soil foundations close to rivers and seas | |
| CN205662938U (en) | Drainage excavation structure falls in foundation ditch | |
| CN103898915B (en) | Building small-area deep foundation pit anti-floating water stop construction method | |
| CN203307776U (en) | Concrete face rock fill dam toe board structure | |
| CN107023013A (en) | A kind of green precipitation method for making full use of hydrogeological characteristic | |
| CN204298837U (en) | Bright, dark drainage system | |
| CN101229951B (en) | Bottom soft vacuum method for pumping surface water of sullage yard | |
| CN203429651U (en) | Ultra-large type deep foundation pit drainage system applied to littoral facies geological stratification area | |
| CN110185051A (en) | Deep narrow excavation water discharge method | |
| CN113585311B (en) | Vacuum dewatering method with dewatering well penetrating through deep foundation pit | |
| CN203977385U (en) | Be applied to the self adaptation distortion anti-seepage channel of minery | |
| CN107130644A (en) | Coffering composite geo-membrane and gravelly clay combination against seepage construction method | |
| CN202925540U (en) | Arrangement structure of device for processing soft soil foundation in coastal reclamation region | |
| CN106480896A (en) | Open caisson preliminary sedimentation method when large-scale well-sinking sinks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140910 |