CN110284486B - Soft soil foundation stabilization drainage structure - Google Patents
Soft soil foundation stabilization drainage structure Download PDFInfo
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- CN110284486B CN110284486B CN201910594403.6A CN201910594403A CN110284486B CN 110284486 B CN110284486 B CN 110284486B CN 201910594403 A CN201910594403 A CN 201910594403A CN 110284486 B CN110284486 B CN 110284486B
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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
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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
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
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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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a soft soil foundation reinforcing and drainage structure, which comprises a plurality of reinforcing structures buried in a soft soil foundation, wherein the tops of all the reinforcing structures extend horizontally and are connected with one another to form a gravel layer, a geotextile layer is laid above the gravel layer, a cement bonding layer is laid above the geotextile layer, and the cement bonding layer is buried in the soft soil foundation; the top of the reinforced structure extends upwards to be provided with a supporting column, and the supporting column sequentially penetrates through the gravel layer, the geotextile layer and the cement bonding layer from bottom to top; the invention improves the stability and the bearing capacity and further improves the drainage effect.
Description
Technical Field
The invention relates to a soft soil foundation reinforcing and drainage structure, and belongs to the technical field of construction engineering construction.
Background
The southeast coastal region of China is always rich in sugarcane, a large number of people are gathered in the region, and the problem of originally deficient land resources becomes more tense along with the continuous influx of the people. In order to adapt to the continuous development of economic construction of the southeast coastal region, buildings have to be built on soft soil foundations. Because the soft soil foundation has low shear strength, high water content, poor water permeability and certain rheological property, infrastructure needs to be constructed at the upper part of the soft soil foundation and needs to be correspondingly treated. In all the soft soil foundation treatment methods, a drainage consolidation method is commonly used, and in the traditional drainage consolidation method, sand well foundation consolidation is used most frequently, namely, a sand well or a plastic drainage plate is constructed on a soft soil layer, a sand cushion layer is laid on the surface of the soft soil layer, a load is applied above the sand cushion layer, and the drainage consolidation work of the soft soil foundation is carried out.
The traditional sand well foundation drainage consolidation method has the advantages of low drainage efficiency, long construction period, more control points and incapability of effectively meeting actual requirements.
Disclosure of Invention
The invention provides a soft soil foundation reinforcing drainage structure aiming at the problems, which improves the stability and the bearing capacity and further improves the drainage effect.
The specific technical scheme is as follows:
a soft soil foundation reinforcing and drainage structure comprises a plurality of reinforcing structures buried in a soft soil foundation, wherein the tops of all the reinforcing structures extend horizontally and are connected with one another to form a gravel layer, a geotextile layer is laid above the gravel layer, a cement bonding layer is laid above the geotextile layer, and the cement bonding layer is buried in the soft soil foundation; the top of the reinforced structure extends upwards and is provided with a supporting column, and the supporting column sequentially penetrates through the gravel layer, the geotextile layer and the cement bonding layer from bottom to top.
Furthermore, the reinforcing structure comprises a plug-in column with a cylindrical structure, an adsorption cavity with a regular quadrangular prism structure is arranged in the plug-in column, a circle of buffer cavity is arranged outside the adsorption cavity, and the height of the buffer cavity is smaller than that of the adsorption cavity;
the buffer cavity is connected with the adsorption cavity through a plurality of first channels which are uniformly distributed on the top of the buffer cavity in a circumferential manner;
a plurality of second channel groups are circumferentially and uniformly distributed on the outer wall of the buffer cavity, each second channel group comprises a plurality of second channels arranged along the axial direction of the splicing column, and the second channels are obliquely arranged downwards and extend outwards to be communicated with the outside;
be equipped with the negative pressure subassembly in the absorption chamber, the negative pressure subassembly is used for passing through the second passageway with the water in the soft soil foundation, through the cushion chamber, transfers to in the absorption chamber via first passageway again.
Furthermore, the negative pressure assembly comprises a vertical and rotatable lead screw arranged in the adsorption cavity, the top of the lead screw penetrates through the adsorption cavity to be connected with an output shaft of a stepping motor fixed in the adjusting cavity, and a plug block is arranged on the lead screw in a threaded fit manner;
the stepping motor drives the screw rod to rotate, so that the chock block moves up and down in the adsorption cavity in a reciprocating manner;
the bottom of the adsorption cavity is provided with an air outlet which is communicated with the outside through an air outlet pipeline;
and a water pumping port is arranged above the gas outlet and is connected with a water pumping pump through a water pumping pipeline, and a control valve is arranged on the water pumping pipeline.
Furthermore, the outer wall of the insertion column is coated with at least one layer of filter screen, and the filter screen covers all the openings of the second channels.
Furthermore, a supporting component is arranged on the outer wall of the insertion column.
Furthermore, the support assembly comprises a support bar spirally wound and welded and fixed on the plug-in column, and a circle of outer shield is arranged outside the support bar;
the outer shield comprises a side shield wall, a top ring arranged at the top of the side shield wall and a bottom ring arranged at the bottom of the side shield wall; the top ring and the bottom ring are respectively welded and fixed on the plug-in column, and the side cover wall is pressed on the supporting bar and is fixed in a bonding or screw connection mode; a plurality of water permeable holes are uniformly distributed on the bottom ring.
Furthermore, the bottom of the plug column extends downwards to form a cone structure.
Further, the construction steps of the soft soil foundation reinforced drainage structure are as follows:
1) digging a foundation pit on the soft soil foundation, wherein the depth of the foundation pit is greater than the height of the splicing column;
2) inserting the splicing column into the foundation pit, backfilling until the soil is level to the top of the splicing column, and compacting;
3) paving a gravel layer, a geotextile layer and a cement bonding layer on the backfill soil in sequence;
4) after the cement consolidation layer is solidified, a layer of backfill soil is laid on the cement consolidation layer.
Further, the drainage method of the soft soil foundation reinforced drainage structure comprises the following steps:
1) in an initial state, the chock is arranged below the first channel;
2) the plunger is driven by the stepping motor to move downwards in the adsorption cavity, negative pressure is generated in the moving process, water in the soft soil foundation enters the outer shield cover from the water permeable hole in the bottom ring, the water circularly rises in the outer shield cover, the water in the outer shield cover can permeate into the buffer cavity from the second channel in the rising process, and the water enters the adsorption cavity from the first channel at the top of the buffer cavity after the buffer cavity is filled with the water;
3) when the chock block moves to the bottom of the adsorption cavity and the water pumping port is positioned above the chock block, the water in the adsorption cavity can be transferred out by opening the control valve and the water pumping pump;
4) after the water in the adsorption cavity is transferred, the control valve and the water suction pump are closed, the plug block is moved upwards, and the stored water in the buffer cavity can be reversely pushed into the soft soil foundation to form a cycle.
The invention has the beneficial effects that:
the invention can not only reinforce the soft soil foundation, but also circularly drain and replenish water to the soft soil foundation, thereby improving the stability and the bearing capacity and ensuring the drainage effect.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is an enlarged view of the reinforcing structure.
Reference numerals
The concrete comprises a reinforced structure 1, a gravel layer 2, a geotextile layer 3, a cement bonding layer 4, a soft soil foundation 5 and a support column 6;
the device comprises a plug column 101, an adsorption cavity 102, a buffer cavity 103, a first channel 104, a second channel 105 and a cone structure 106;
the device comprises a lead screw 201, a stepping motor 202, a plug block 203, an air outlet pipeline 204, a water pumping pipeline 205, a water pumping pump 206 and a control valve 207;
a filter screen 301;
Detailed Description
In order to make the technical scheme of the invention clearer and clearer, the invention is further described with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent replacement and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.
As shown in the figure, the soft soil foundation reinforcing and drainage structure comprises a plurality of reinforcing structures 1 buried in a soft soil foundation, wherein the tops of all the reinforcing structures extend horizontally and are connected with one another to form a gravel layer 2, a geotextile layer 3 is laid above the gravel layer, a cement bonding layer 4 is laid above the geotextile layer, and the cement bonding layer is buried in a soft soil foundation 5; the top of the reinforced structure extends upwards and is provided with a supporting column 6, and the supporting column sequentially penetrates through the gravel layer, the geotextile layer and the cement bonding layer from bottom to top.
The reinforcing structure comprises a plug-in column 101 with a cylindrical structure, an adsorption cavity 102 with a regular quadrangular prism structure is arranged in the plug-in column, a circle of buffer cavity 103 is arranged outside the adsorption cavity, and the height of the buffer cavity is smaller than that of the adsorption cavity;
the buffer cavity is connected with the adsorption cavity through a plurality of first channels 104 which are uniformly distributed on the top of the buffer cavity in a circumferential manner;
a plurality of second channel groups are circumferentially and uniformly distributed on the outer wall of the buffer cavity, each second channel group comprises a plurality of second channels 105 arranged along the axial direction of the splicing column, and the second channels are obliquely arranged downwards and extend outwards to be communicated with the outside;
be equipped with the negative pressure subassembly in the absorption chamber, the negative pressure subassembly is used for passing through the second passageway with the water in the soft soil foundation, through the cushion chamber, transfers to in the absorption chamber via first passageway again.
The negative pressure assembly comprises a lead screw 201 vertically and rotatably arranged in the adsorption cavity, the top of the lead screw penetrates through the adsorption cavity to be connected with an output shaft of a stepping motor 202 fixed in the adjusting cavity, and a plug block 203 is arranged on the lead screw in a threaded fit manner;
the stepping motor drives the screw rod to rotate, so that the chock block moves up and down in the adsorption cavity in a reciprocating manner;
the bottom of the adsorption cavity is provided with an air outlet which is communicated with the outside through an air outlet pipeline 204;
a water pumping port is arranged above the air outlet and is connected with a water pumping pump 206 through a water pumping pipeline 205, and a control valve 207 is arranged on the water pumping pipeline.
The outer wall of the splicing column is coated with at least one layer of filter screen 301, and the filter screen covers all the second channel openings.
The outer wall of the plug column is provided with a support component 401.
The supporting component comprises a supporting strip 402 spirally wound and welded and fixed on the plug column, and a circle of outer shield 403 is arranged outside the supporting strip;
the outer shield comprises a side shield wall 404, a top ring 405 disposed at the top of the side shield wall, and a bottom ring 406 disposed at the bottom of the side shield wall; the top ring and the bottom ring are respectively welded and fixed on the plug-in column, and the side cover wall is pressed on the supporting bar and is fixed in a bonding or screw connection mode; a plurality of water permeable holes 407 are uniformly distributed on the bottom ring.
The bottom of the peg extends downward to form a cone structure 106.
Further, the construction steps of the soft soil foundation reinforced drainage structure are as follows:
1) digging a foundation pit on the soft soil foundation, wherein the depth of the foundation pit is greater than the height of the splicing column;
2) inserting the splicing column into the foundation pit, backfilling until the soil is level to the top of the splicing column, and compacting;
3) paving a gravel layer, a geotextile layer and a cement bonding layer on the backfill soil in sequence;
4) after the cement consolidation layer is solidified, a layer of backfill soil is laid on the cement consolidation layer.
Further, the drainage method of the soft soil foundation reinforced drainage structure comprises the following steps:
1) in an initial state, the chock is arranged below the first channel;
2) the plunger is driven by the stepping motor to move downwards in the adsorption cavity, negative pressure is generated in the moving process, water in the soft soil foundation enters the outer shield cover from the water permeable hole in the bottom ring, the water circularly rises in the outer shield cover, the water in the outer shield cover can permeate into the buffer cavity from the second channel in the rising process, and the water enters the adsorption cavity from the first channel at the top of the buffer cavity after the buffer cavity is filled with the water;
3) when the chock block moves to the bottom of the adsorption cavity and the water pumping port is positioned above the chock block, the water in the adsorption cavity can be transferred out by opening the control valve and the water pumping pump;
4) after the water in the adsorption cavity is transferred, the control valve and the water suction pump are closed, the plug block is moved upwards, and the stored water in the buffer cavity can be reversely pushed into the soft soil foundation to form a cycle.
Claims (1)
1. A soft soil foundation reinforcing and draining method is characterized by comprising a plurality of reinforcing structures buried in a soft soil foundation, wherein the tops of all the reinforcing structures extend horizontally and are connected with one another to form a gravel layer, a geotextile layer is laid above the gravel layer, a cement bonding layer is laid above the geotextile layer, and the cement bonding layer is buried in the soft soil foundation; the top of the reinforced structure extends upwards to be provided with a supporting column, and the supporting column sequentially penetrates through the gravel layer, the geotextile layer and the cement bonding layer from bottom to top; the reinforcing structure comprises a splicing column with a cylindrical structure, an adsorption cavity with a regular quadrangular prism structure is arranged in the splicing column, a circle of buffer cavity is arranged outside the adsorption cavity, and the height of the buffer cavity is smaller than that of the adsorption cavity;
the buffer cavity is connected with the adsorption cavity through a plurality of first channels which are uniformly distributed on the top of the buffer cavity in a circumferential manner;
a plurality of second channel groups are circumferentially and uniformly distributed on the outer wall of the buffer cavity, each second channel group comprises a plurality of second channels arranged along the axial direction of the splicing column, and the second channels are obliquely arranged downwards and extend outwards to be communicated with the outside;
a negative pressure assembly is arranged in the adsorption cavity and used for transferring water in the soft soil foundation to the adsorption cavity through the second channel, the buffer cavity and the first channel;
the negative pressure assembly comprises a vertical and rotatable lead screw arranged in the adsorption cavity, the top of the lead screw penetrates through the adsorption cavity to be connected with an output shaft of a stepping motor fixed in the adjusting cavity, and a plug block is arranged on the lead screw in a threaded fit manner;
the stepping motor drives the screw rod to rotate, so that the chock block moves up and down in the adsorption cavity in a reciprocating manner;
the bottom of the adsorption cavity is provided with an air outlet which is communicated with the outside through an air outlet pipeline;
a water pumping port is arranged above the air outlet and is connected with a water pumping pump through a water pumping pipeline, and a control valve is arranged on the water pumping pipeline; the outer wall of the insertion column is coated with at least one layer of filter screen, and the filter screen covers all the second channel openings; the outer wall of the insertion column is provided with a supporting component; the support assembly comprises a support bar spirally wound and welded and fixed on the plug-in column, and a circle of outer shield is arranged outside the support bar;
the outer shield comprises a side shield wall, a top ring arranged at the top of the side shield wall and a bottom ring arranged at the bottom of the side shield wall; the top ring and the bottom ring are respectively welded and fixed on the plug-in column, and the side cover wall is pressed on the supporting bar and is fixed in a bonding or screw connection mode; a plurality of water permeable holes are uniformly distributed on the bottom ring; the bottom of the inserting column extends downwards to form a cone structure;
the drainage method comprises the following steps:
1) in an initial state, the chock is arranged below the first channel;
2) the plunger is driven by the stepping motor to move downwards in the adsorption cavity, negative pressure is generated in the moving process, water in the soft soil foundation enters the outer shield cover from the water permeable hole in the bottom ring, the water circularly rises in the outer shield cover, the water in the outer shield cover can permeate into the buffer cavity from the second channel in the rising process, and the water enters the adsorption cavity from the first channel at the top of the buffer cavity after the buffer cavity is filled with the water;
3) when the chock block moves to the bottom of the adsorption cavity and the water pumping port is positioned above the chock block, the water in the adsorption cavity can be transferred out by opening the control valve and the water pumping pump;
4) after the water in the adsorption cavity is transferred, the control valve and the water suction pump are closed, the plug block is moved upwards, and the stored water in the buffer cavity can be reversely pushed into the soft soil foundation to form a cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910594403.6A CN110284486B (en) | 2019-07-03 | 2019-07-03 | Soft soil foundation stabilization drainage structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910594403.6A CN110284486B (en) | 2019-07-03 | 2019-07-03 | Soft soil foundation stabilization drainage structure |
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| CN110284486A CN110284486A (en) | 2019-09-27 |
| CN110284486B true CN110284486B (en) | 2021-01-15 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202031076U (en) * | 2011-03-25 | 2011-11-09 | 浙江广川工程咨询有限公司 | Compound vacuum tube well for reinforcing dredging soft soil |
| JP5724222B2 (en) * | 2010-06-11 | 2015-05-27 | 株式会社大林組 | Pumping unit, soft soil improvement method, ground excavation method, contaminated soil purification method, and condensate method |
| CN107326893A (en) * | 2017-06-28 | 2017-11-07 | 广州市万厚投资有限公司 | A kind of soft soil foundation ultra-deep forced-ventilated water consolidation structure |
| CN107829425A (en) * | 2017-11-06 | 2018-03-23 | 汤连生 | One kind tool circulation air emptying function column type forced-ventilated water pipe, device and method |
| CN108930263A (en) * | 2018-09-04 | 2018-12-04 | 商丘工学院 | A kind of basement process structure based on level of ground water |
| CN109372722A (en) * | 2017-12-15 | 2019-02-22 | 北京市人工影响天气办公室 | Inlet duct for weather modification laboratory |
-
2019
- 2019-07-03 CN CN201910594403.6A patent/CN110284486B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5724222B2 (en) * | 2010-06-11 | 2015-05-27 | 株式会社大林組 | Pumping unit, soft soil improvement method, ground excavation method, contaminated soil purification method, and condensate method |
| CN202031076U (en) * | 2011-03-25 | 2011-11-09 | 浙江广川工程咨询有限公司 | Compound vacuum tube well for reinforcing dredging soft soil |
| CN107326893A (en) * | 2017-06-28 | 2017-11-07 | 广州市万厚投资有限公司 | A kind of soft soil foundation ultra-deep forced-ventilated water consolidation structure |
| CN107829425A (en) * | 2017-11-06 | 2018-03-23 | 汤连生 | One kind tool circulation air emptying function column type forced-ventilated water pipe, device and method |
| CN109372722A (en) * | 2017-12-15 | 2019-02-22 | 北京市人工影响天气办公室 | Inlet duct for weather modification laboratory |
| CN108930263A (en) * | 2018-09-04 | 2018-12-04 | 商丘工学院 | A kind of basement process structure based on level of ground water |
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