CN106284283A - A kind for the treatment of of soft foundation is changed and is filled out natural soft-clay control debulking methods - Google Patents
A kind for the treatment of of soft foundation is changed and is filled out natural soft-clay control debulking methods Download PDFInfo
- Publication number
- CN106284283A CN106284283A CN201610663233.9A CN201610663233A CN106284283A CN 106284283 A CN106284283 A CN 106284283A CN 201610663233 A CN201610663233 A CN 201610663233A CN 106284283 A CN106284283 A CN 106284283A
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- Prior art keywords
- soft
- treatment
- changed
- compactness
- rolling
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- 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.)
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Classifications
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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
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
-
- 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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/123—Consolidating by placing solidifying or pore-filling substances in the soil and compacting the soil
Abstract
The invention discloses a kind for the treatment of of soft foundation to change and fill out natural soft-clay and control debulking methods, the method include preparation of construction, road groove excavation, the determination of lift height meter coefficient of loose laying, substrate roll, paving and leveling and the step such as roll, the present invention be effectively control treatment of soft foundation change fill out natural soft-clay control debulking methods, after substrate is excavated, need cleaning, control the water content of substrate soil.Paving process is necessary to ensure that the coefficient of loose laying paved.Roller compaction process both sides are longitudinally carried out to central authorities, transverse joint overlapping 0.4 0.5m, longitudinal overlap 2.0m between adjacent two sections, accomplish that pressure and dead angle, without obvious wheelmark, are not leaked in surface, in order to ensure that the compactness rolling speed to rolling compaction machine is less than 3 4km/h.
Description
Technical field
The present invention relates to a kind for the treatment of of soft foundation change and fill out natural soft-clay and control debulking methods.
Background technology
Traditional soft base processing method, can not the most comprehensively be compacted.It is bright that the present invention can avoid soft primary surface to have
Aobvious wheelmark, has leakage pressure and dead angle, it is ensured that compactness is less than 3-4km/h to the rolling speed of rolling compaction machine.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides following technical scheme:
One treatment of soft foundation of the present invention change fill out natural soft-clay control debulking methods, surveying and locating and draw cross-sectional view according to
The degree of depth excavated and scope carry out construction lofting, spread out excavation Calx line, draw excavated section figure；Before excavation, fully carry out
Every preparation, fixes sidewalk, it is ensured that excavator is worked continuously, and joins sufficient dump truck, once should execute continuously after excavation
Work, preventing from raining makes substrate be soaked by rainwater；After being excavated to the section that design requires, as still there being non-suitable material, should be on request
Width and the degree of depth continue to excavate, and carry out changing filling out process.During substrate altering fill, as outside toe, excavating sideline exceeds highway
During land used scope, in the case of ensureing that excavation slope is stable, can suitably adjust the broken rate of excavation outside toe；Construct as requested
Section excavation standard is:
1. when after design grade elevation with the clear table of original ground, elevation difference is more than or equal to design load (A), directly at clear table
Dig 90cm soft layer under on the basis of, tamp the 10cm that sinks；
2. when after design grade elevation with the clear table of original ground, elevation difference is less than design load (A).This kind of situation is at clear table
Dig 0.9+ (A-H) rice soft layer under on the basis of, tamp the 10cm that sinks, to guarantee roadbed thickness and natural soft-clay layer thickness；
As a preferred technical solution of the present invention, substrate rolls: after road groove has excavated, and removes foreign material, must not have
Accumulated snow, puddle, survey its substrate soil water content, and its compaction water content all should control in the range of optimum moisture content ± 2%；When soil
When actual water content does not meets above-mentioned area requirement, should uniformly add water or soil is spread out, airing, can after making to reach above-mentioned requirements
It is compacted.
As a preferred technical solution of the present invention, change back-up sand gravel: after base treatment, measure construction king-pile, skirt piles, put
Go out fender pile；By design attitude measuring line midline, sideline, every about 20m arranges a group switching centre stake, and curved section is encrypted to 5～10m
One group；Change and fill out width and should be wider than roadbed corner 30cm.
As a preferred technical solution of the present invention, pave smooth: after exchange filling amount meets requirement, uniform with bull-dozer
Shakeout, reach requirement loose laying depth, carry out essence with land leveller flat, it is ensured that scope of operation uniform ground, without hole bag phenomenon, formed
1%-3% horizontal wall inscription is beneficial to draining；Ensure that road roller wheel can roll on uniform contact ground on surface, reach the pressure of regulation
Solidity and prevent roadbed from being soaked by rainwater.
As a preferred technical solution of the present invention, cal rolling: filling compaction operation, use self-propelled vibration pressure road
Machine rolls, rolling speed 3～4km/h；Should follow when rolling roadbed first light after weight, the most steady after shake, the lowest after high, the slowest after
The principles such as fast and wheelmark is overlapping；Longitudinally carried out to central authorities by both sides, transverse joint overlap 0.4-0.5m, vertical between adjacent two sections
To overlapping 2.0m, accomplish surface without obvious wheelmark, road roller can not the place of operation, employing machine rams and is compacted, it is ensured that do not have
Leakage pressure and dead angle；Roller compaction process detects compactness, flatness on request, survey crew in compacting process, tracing detection mark
Height, to ensure the thickness of making layer.
As a preferred technical solution of the present invention, determine parameter:
A, lift height
Use two-layer to fill molding mode, if two-layer is filled can not meet design requirement, consider further that the side filled out is changed in layering
Formula, according to the 6.3.4 article requirement in " Highway Roadbed Construction Technology specification " (JTG F10-2006), simultaneously for preventing bulky grain bone
Material is formed in structure sheaf and supports and affect consolidation effect, and layering minimum thickness is answered the maximum particle diameter of >=2 times, and this test section divides
Layer thickness controls at about 25cm；
B, coefficient of loose laying；
If using one layer to fill molding mode, first testing by 1.2 coefficient of loose laying, if not reaching requirement, adjusting
Whole；If using layering to change the mode filled out, I is tested by 30cm by bid section test section loose laying depth, by digging the method pair tested
Thickness before and after rolling carries out detection and calculates；
C, number of rolling；
Roller compaction process in strict accordance with weight after first light, the slowest after fast, behind first edge in the middle of principle carry out, first static pressure 1 time,
With compacting of shaking the most by force after micro-vibration compaction 1 time, shake by force compacting time road roller gait of march 2.0-2.5km/h, keep compacting all
Even, do not leak pressure, detection compactness uses sand replacement method to detect, when road roller shakes and is pressed onto second time, starts to check compactness,
During detection, all mechanical rest road sides forbid to start, in order to avoid affecting testing result, are once compacted every 1 time detection later
Degree, the number of rolling till compactness reaches 93%.
The present invention is reached to provide the benefit that: the present invention be effectively control treatment of soft foundation change fill out natural soft-clay control compacting
Method, needs cleaning after substrate is excavated, controls the water content of substrate soil.Paving process is necessary to ensure that the coefficient of loose laying paved.
Roller compaction process both sides are longitudinally carried out to central authorities, transverse joint overlap 0.4-0.5m, and longitudinal overlap 2.0m between adjacent two sections accomplishes
Pressure and dead angle, without obvious wheelmark, are not leaked in surface, in order to ensure that the compactness rolling speed to rolling compaction machine is less than 3-4km/
h。
Detailed description of the invention
Hereinafter the preferred embodiments of the present invention are illustrated, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Embodiment 1
A kind for the treatment of of soft foundation provided by the present invention is changed and is filled out natural soft-clay and control debulking methods, surveying and locating and draw cross-section
Face figure carries out construction lofting according to the degree of depth excavated and scope, spreads out excavation Calx line, draws excavated section figure；Before excavation,
Fully carry out every preparation, fix sidewalk, it is ensured that excavator is worked continuously, join sufficient dump truck, once should enter after excavation
Row construction continuously, preventing from raining makes substrate be soaked by rainwater；After being excavated to the section that design requires, as still there being non-suitable material,
Width on request and the degree of depth should continue to excavate, and carry out changing filling out process.During substrate altering fill, such as excavating sideline outside toe
During beyond highway land scope, in the case of ensureing that excavation slope is stable, can suitably adjust the broken rate of excavation outside toe；According to
Require that construction section excavation standard is:
1. when after design grade elevation with the clear table of original ground, elevation difference is more than or equal to design load (A), directly at clear table
Dig 90cm soft layer under on the basis of, tamp the 10cm that sinks；
2. when after design grade elevation with the clear table of original ground, elevation difference is less than design load (A).This kind of situation is at clear table
Dig 0.9+ (A-H) rice soft layer under on the basis of, tamp the 10cm that sinks, to guarantee roadbed thickness and natural soft-clay layer thickness；
Substrate rolls: after road groove has excavated, and removes foreign material, must not have accumulated snow, puddle, survey its substrate soil water content, its
Compaction water content all should control in the range of optimum moisture content ± 2%；When the actual water content of soil does not meets above-mentioned area requirement
Time, should uniformly add water or soil is spread out, airing, can be compacted after making to reach above-mentioned requirements.
Change back-up sand gravel: after base treatment, measure construction king-pile, skirt piles, release fender pile；By in design attitude measuring circuit
Line, sideline, every about 20m arranges a group switching centre stake, and curved section is encrypted to 5～10m mono-groups；Change and fill out width and should be wider than roadbed corner
30cm。
Pave smooth: after exchange filling amount meets requirement, uniformly shakeout with bull-dozer, reach requirement loose laying depth, use level land
It is flat that machine carries out essence, it is ensured that scope of operation uniform ground, without hole bag phenomenon, forms 1%-3% horizontal wall inscription and is beneficial to draining；Ensure pressure road
Wheel can roll on uniform contact ground on surface, reaches the compactness of regulation and prevents roadbed from being soaked by rainwater.
Cal rolling: filling compaction operation, uses self-propelled vibrated roller to roll, rolling speed 3～4km/h；
Should follow when rolling roadbed first light after weight, the most steady after shake, the lowest after high, the slowest after the principles such as fast and wheelmark is overlapping；By both sides
Longitudinally carry out to central authorities, transverse joint overlap 0.4-0.5m, longitudinal overlap 2.0m between adjacent two sections, accomplish that surface is without substantially wheel
Mark, road roller can not the place of operation, employing machine rams and is compacted, it is ensured that do not leak pressure and dead angle；In roller compaction process on request
Detection compactness, flatness, survey crew is in compacting process, and tracing detection absolute altitude, to ensure the thickness of making layer.
Determine parameter:
A, lift height
Use two-layer to fill molding mode, if two-layer is filled can not meet design requirement, consider further that the side filled out is changed in layering
Formula, according to the 6.3.4 article requirement in " Highway Roadbed Construction Technology specification " (JTG F10-2006), simultaneously for preventing bulky grain bone
Material is formed in structure sheaf and supports and affect consolidation effect, and layering minimum thickness is answered the maximum particle diameter of >=2 times, and this test section divides
Layer thickness controls at about 25cm；
B, coefficient of loose laying；
If using one layer to fill molding mode, first testing by 1.2 coefficient of loose laying, if not reaching requirement, adjusting
Whole；If using layering to change the mode filled out, I is tested by 30cm by bid section test section loose laying depth, by digging the method pair tested
Thickness before and after rolling carries out detection and calculates；
C, number of rolling；
Roller compaction process in strict accordance with weight after first light, the slowest after fast, behind first edge in the middle of principle carry out, first static pressure 1 time,
With compacting of shaking the most by force after micro-vibration compaction 1 time, shake by force compacting time road roller gait of march 2.0-2.5km/h, keep compacting all
Even, do not leak pressure, detection compactness uses sand replacement method to detect, when road roller shakes and is pressed onto second time, starts to check compactness,
During detection, all mechanical rest road sides forbid to start, in order to avoid affecting testing result, are once compacted every 1 time detection later
Degree, the number of rolling till compactness reaches 93%.
Finally it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention,
Although being described in detail the present invention with reference to previous embodiment, for a person skilled in the art, it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent.
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (6)
1. a treatment of soft foundation is changed and is filled out natural soft-clay control debulking methods, it is characterised in that surveying and locating and drafting cross-sectional view
Carry out construction lofting according to the degree of depth excavated and scope, spread out excavation Calx line, draw excavated section figure；Before excavation, fully
Carry out every preparation, fix sidewalk, it is ensured that excavator is worked continuously, join sufficient dump truck, once should carry out after excavation even
Continuous construction, preventing from raining makes substrate be soaked by rainwater；After being excavated to the section that design requires, as still there being non-suitable material, should be by
The width and the degree of depth that require continue to excavate, and carry out changing filling out process；During substrate altering fill, as outside toe, excavating sideline exceeds
During highway land scope, in the case of ensureing that excavation slope is stable, can suitably adjust the broken rate of excavation outside toe；As requested
Construction section excavation standard is:
1. when after design grade elevation with the clear table of original ground, elevation difference is more than or equal to design load (A), directly at the base of clear table
Plinth digs 90cm soft layer up and down, tamps the 10cm that sinks；
2. when after design grade elevation with the clear table of original ground, elevation difference is less than design load (A).This kind of situation is at the base of clear table
Plinth digs 0.9+ (A-H) rice soft layer up and down, tamps the 10cm that sinks, to guarantee roadbed thickness and natural soft-clay layer thickness.
A kind for the treatment of of soft foundation the most according to claim 1 is changed and is filled out natural soft-clay control debulking methods, it is characterised in that substrate
Rolling: after road groove has excavated, remove foreign material, must not have accumulated snow, puddle, survey its substrate soil water content, its compaction water content is equal
Should control in the range of optimum moisture content ± 2%；When the actual water content of soil does not meets above-mentioned area requirement, should uniformly add water
Or soil is spread out, airing, can be compacted after making to reach above-mentioned requirements.
A kind for the treatment of of soft foundation the most according to claim 1 is changed and is filled out natural soft-clay control debulking methods, it is characterised in that changes and fills out
Gravel: after base treatment, measures construction king-pile, skirt piles, releases fender pile；By design attitude measuring line midline, sideline, every 20m
Left and right arranges a group switching centre stake, and curved section is encrypted to 5～10m mono-groups；Change and fill out width and should be wider than roadbed corner 30cm.
A kind for the treatment of of soft foundation the most according to claim 1 is changed and is filled out natural soft-clay control debulking methods, it is characterised in that pave
Smooth: after exchange filling amount meets requirement, uniformly to shakeout with bull-dozer, reach requirement loose laying depth, carry out essence with land leveller flat, protect
Card scope of operation uniform ground, without hole bag phenomenon, forms 1%-3% horizontal wall inscription and is beneficial to draining；Ensure that road roller wheel can be all on surface
Even contact ground is rolled, and reaches the compactness of regulation and prevents roadbed from being soaked by rainwater.
A kind for the treatment of of soft foundation the most according to claim 1 is changed and is filled out natural soft-clay control debulking methods, it is characterised in that machinery
Roll: filling compaction operation, use self-propelled vibrated roller to roll, rolling speed 3～4km/h；Answer when rolling roadbed
Follow first light after weight, the most steady after shake, the lowest after high, the slowest after the principles such as fast and wheelmark is overlapping；Longitudinally entered to central authorities by both sides
OK, transverse joint overlap 0.4-0.5m, longitudinal overlap 2.0m between adjacent two sections, accomplish surface without obvious wheelmark, road roller is not
The place of energy operation, employing machine rams and is compacted, it is ensured that do not leak pressure and dead angle；Roller compaction process detects on request compactness,
Flatness, survey crew is in compacting process, and tracing detection absolute altitude, to ensure the thickness of making layer.
A kind for the treatment of of soft foundation the most according to claim 1 is changed and is filled out natural soft-clay control debulking methods, it is characterised in that determine
Parameter:
A, lift height
Use two-layer to fill molding mode, if two-layer is filled can not meet design requirement, consider further that the mode filled out, root are changed in layering
According to the 6.3.4 article requirement in " Highway Roadbed Construction Technology specification " (JTG F10-2006), simultaneously for preventing bulky grain aggregate from existing
Structure sheaf is formed and supports and affect consolidation effect, layering minimum thickness is answered the maximum particle diameter of >=2 times, this test section layering thickness
Degree controls at about 25cm；
B, coefficient of loose laying；
If using one layer to fill molding mode, first testing by 1.2 coefficient of loose laying, if not reaching requirement, being adjusted；
If using layering to change the mode filled out, I is tested by 30cm by bid section test section loose laying depth, by digging the method tested to stone roller
Thickness before and after pressure carries out detection and calculates；
C, number of rolling；
Roller compaction process in strict accordance with weight after first light, the slowest after fast, behind first edge in the middle of principle carry out, first static pressure 1 time, with micro-
Shake and shake the most by force compacting after compacting 1 time, shake by force compacting time road roller gait of march 2.0-2.5km/h, keep compacting uniform, no
Leakage pressure, detection compactness uses sand replacement method to detect, when road roller shakes and is pressed onto second time, starts to check compactness, detection
Time, all mechanical rest road sides forbid to start, in order to avoid affecting testing result, detect a compactness every 1 time, directly later
The number of rolling 93% is reached to compactness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663233.9A CN106284283A (en) | 2016-08-12 | 2016-08-12 | A kind for the treatment of of soft foundation is changed and is filled out natural soft-clay control debulking methods |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663233.9A CN106284283A (en) | 2016-08-12 | 2016-08-12 | A kind for the treatment of of soft foundation is changed and is filled out natural soft-clay control debulking methods |
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| CN106284283A true CN106284283A (en) | 2017-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629620A (en) * | 2019-09-14 | 2019-12-31 | 江苏永联精筑建设集团有限公司 | Construction method for filling natural sand gravel roadbed |
| CN111622205A (en) * | 2020-06-02 | 2020-09-04 | 中国水利水电第六工程局有限公司 | Method for treating permanent slope gravel stone foundation |
| CN112982054A (en) * | 2019-12-14 | 2021-06-18 | 浙江建腾建设有限公司 | Reinforcing treatment construction method for specific geological rainflower stone gravel layer roadbed in Nanjing area |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974898A (en) * | 2010-11-03 | 2011-02-16 | 成都四海岩土工程有限公司 | Roller compacted concrete cushion changing and filling method |
| CN102383413A (en) * | 2011-08-31 | 2012-03-21 | 东北大学 | Method for constructing strengthened saturated-flow plastic silt soft soil foundation |
| JP2015031080A (en) * | 2013-08-05 | 2015-02-16 | 松江土建株式会社 | Steel sheet pile trace grout filling replacement method and steel sheet pile for injection |
| CN104762858A (en) * | 2015-03-16 | 2015-07-08 | 夏旻淑 | Asphalt concrete construction method for soft soil matrix pavement |
-
2016
- 2016-08-12 CN CN201610663233.9A patent/CN106284283A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974898A (en) * | 2010-11-03 | 2011-02-16 | 成都四海岩土工程有限公司 | Roller compacted concrete cushion changing and filling method |
| CN102383413A (en) * | 2011-08-31 | 2012-03-21 | 东北大学 | Method for constructing strengthened saturated-flow plastic silt soft soil foundation |
| JP2015031080A (en) * | 2013-08-05 | 2015-02-16 | 松江土建株式会社 | Steel sheet pile trace grout filling replacement method and steel sheet pile for injection |
| CN104762858A (en) * | 2015-03-16 | 2015-07-08 | 夏旻淑 | Asphalt concrete construction method for soft soil matrix pavement |
Non-Patent Citations (2)
| Title |
|---|
| 李志刚: "公路路基换填天然砂砾施工技术探讨", 《华东公路》 * |
| 郑刚等: "地基处理技术发展综述", 《土木工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629620A (en) * | 2019-09-14 | 2019-12-31 | 江苏永联精筑建设集团有限公司 | Construction method for filling natural sand gravel roadbed |
| CN112982054A (en) * | 2019-12-14 | 2021-06-18 | 浙江建腾建设有限公司 | Reinforcing treatment construction method for specific geological rainflower stone gravel layer roadbed in Nanjing area |
| CN111622205A (en) * | 2020-06-02 | 2020-09-04 | 中国水利水电第六工程局有限公司 | Method for treating permanent slope gravel stone foundation |
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Application publication date: 20170104 |