CN102587385A - Foundation pit supporting method for sludge-exchanged and filled soft soil - Google Patents
Foundation pit supporting method for sludge-exchanged and filled soft soil Download PDFInfo
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- CN102587385A CN102587385A CN2011104628374A CN201110462837A CN102587385A CN 102587385 A CN102587385 A CN 102587385A CN 2011104628374 A CN2011104628374 A CN 2011104628374A CN 201110462837 A CN201110462837 A CN 201110462837A CN 102587385 A CN102587385 A CN 102587385A
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Abstract
The invention discloses a foundation pit supporting method for sludge-exchanged and filled soft soil, which comprises the following steps: (1) performing a small-area exchanging and filling test; (2) after the exchanging and filling test in the step (1) is successful, performing regional exchanging and filling until the whole foundation pit is fully exchanged and filled; (3) sectionally excavating side slopes according to the exchanged and filled regions in the step (2); and (4) performing anchor spray supporting construction on the side slops. The foundation pit supporting method for sludge-exchanged and filled soft soil is specially designed for soft and weak foundations soil with shallower excavated foundation pits, and can reduce working procedures, shorten construction period and save cost.
Description
Technical field
The present invention relates to change in the geotechnical engineering job practices of filling out pattern foundation pit supporting structure, particularly a kind of supporting method of filling out the muddy soft soil foundation ditch that changes.
Background technology
In engineering construction, the weak foundation soil excavation pit all needs side slope is taked supporting measure, for area, shoal, strand; The top soil property is generally mud matter miscellaneous fill, and soil quality stabilizing property is poor, and the bottom soil property is hard rock stratum such as andesite; Use traditional supporting method; Can increase many operations like soil nailed wall retaining structure, campshed supporting and protection structure, diaphragm wall supporting and protection structure etc., prolong the duration, cause the wasting of resources.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of supporting method that is directed to the more shallow weak foundation soil of excavation pit specially.
The present invention adopts following technical scheme:
A kind of foundation pit supporting method of filling out muddy soft soil that changes comprises the steps:
(1) small size changes and fills out test;
(2) change in the step (1) to fill out and carry out the subregion after the success of the test and change and fill out, all change until whole foundation ditch and fill out;
(3) fill out subregion segmentation excavation slope according to changing in the step (2);
(4) side slope is carried out construction of anchor shotcreting.
Further, changing in the step (1) filled out to test and comprised the steps:
I excavates and changes the muddy soft soil of filling out in the pilot region;
II backfill weathering sand and rock ballast;
The compacting of III layered rolling;
The IV excavation slope.
Further, the rock ballast of backfill is grating grit stone or a graded broken stone preferably in the Step II.
Further, the construction of anchor shotcreting in the step (4) comprises the steps:
I carries out unwrapping wire cloth hole according to arrangement diagram;
II rig drilling and forming hole;
It is consistent with dip angle of hole that III inserted link, the body of rod are put into angle;
IV slip casting;
V slurry intensity reach design strength 70% after carry out tensioning fixation.
Further, whole foundation ditch is all changed underground water to be reduced to change before filling out fill out under the absolute altitude or directly carry out draining in the step (2).
The invention has the beneficial effects as follows:
The disclosed foundation pit supporting method of filling out muddy soft soil that changes of the present invention is directed against the more shallow weak foundation soil of excavation pit specially, can reduce operation, the reduction of erection time, practices thrift cost.
Description of drawings
Fig. 1 is the construction process figure of foundation pit supporting method of the present invention
The specific embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Embodiment 1, and is as shown in Figure 1, and present embodiment discloses a kind of foundation pit supporting method of filling out muddy soft soil that changes, and comprises the steps:
(1) small size changes and fills out test;
This step specifically comprises:
I excavates and changes the muddy soft soil of filling out in the pilot region;
II backfill weathering sand and rock ballast, this rock ballast are grating grit stone or graded broken stone preferably
The compacting of III layered rolling;
The IV excavation slope.
(2) if change in the step (1) and fill out success of the test, then carry out the subregion again and change and fill out, all change until whole foundation ditch and fill out, whole foundation ditch is all changed underground water to be reduced to change before filling out fill out under the absolute altitude or directly carry out draining;
(3) fill out subregion segmentation excavation slope according to changing in the step (2);
(4) side slope is carried out construction of anchor shotcreting.
This step specifically comprises:
I carries out unwrapping wire cloth hole according to arrangement diagram;
II rig drilling and forming hole;
It is consistent with dip angle of hole that III inserted link, the body of rod are put into angle;
IV slip casting;
V slurry intensity reach design strength 70% after carry out tensioning fixation.
Existing is example with certain building site excavation of foundation pit support engineering, and this embodiment is set forth comprehensively:
The first step, small size are changed and are filled out test, and the regional usage mining machine of filling out is changed in the job site; Dig out one and fall trapezoidal changing and fill out the zone and change and fill out test, change and fill out long 15 meters of pilot region, 4.0 meters of following bottom width; Suitable for reading wide 12.0 meters, dig to strong-weathered rock about 5 meters of the degree of depth; In fill out grating good weathering sand and rock ballast, the excavator compacting is used in layering.Excavated at the position filled out of exchange in second day, puts the slope at 1: 0.8 by design code, and excavation is after observation, and the excavation slope Forming Quality is good, reaches predefined target.
In second step, the subregion is changed and is filled out, change fill out success of the test after, carry out whole regional segmentation and change and fill out.According to set scheme, by two groups of machineries from foundation ditch east side middle part opposing changing separately to both sides fill out, join to western, every section is changed and fills out length and be no more than 15.0 meters, the segmentation backfill compacting.
In the 3rd step, last changing of step filled out subregion segmentation excavation slope
In the 4th step, side slope is carried out construction of anchor shotcreting, 2 meters of each excavation slope degree of depth; Put the slope by the design code side slope; Side slope is in time revised, cleaning, spray plane bank protection.
Idiographic flow is:
1. unwrapping wire cloth hole: carry out unwrapping wire cloth hole according to arrangement diagram, in the bit error 10cm of hole;
2. rig drilling and forming hole: adopt the track-mounted drill drilling and forming hole;
3. inserted link: it is consistent with dip angle of hole that artificial inserted link, the body of rod are put into angle;
4. slip casting: injecting paste material is water/binder ratio 0.5 neat slurry, once, and grouting pressure 2MPa; Secondary grouting pressure 3MPa.
5. tensioning fixation: slurry intensity reach design strength 70% after carry out tensioning fixation.
Claims (5)
1. one kind is changed the foundation pit supporting method of filling out muddy soft soil, it is characterized in that, comprises the steps:
(1) small size changes and fills out test;
(2) change in the step (1) to fill out and carry out the subregion after the success of the test and change and fill out, all change until whole foundation ditch and fill out;
(3) fill out subregion segmentation excavation slope according to changing in the step (2);
(4) side slope is carried out construction of anchor shotcreting.
2. according to the foundation pit supporting method in the claim 1, it is characterized in that: changing in the step (1) filled out test and comprised the steps:
I excavates and changes the muddy soft soil of filling out in the pilot region;
II backfill weathering sand and rock ballast;
The compacting of III layered rolling;
The IV excavation slope.
3. according to the foundation pit supporting method in the claim 1, it is characterized in that: the construction of anchor shotcreting in the step (4) comprises the steps:
I carries out unwrapping wire cloth hole according to arrangement diagram;
II rig drilling and forming hole;
It is consistent with dip angle of hole that III inserted link, the body of rod are put into angle;
IV slip casting;
V slurry intensity reach design strength 70% after carry out tensioning fixation.
4. according to the foundation pit supporting method in the claim 1, it is characterized in that: in the step (2) whole foundation ditch is all changed underground water to be reduced to change before filling out filled out under the absolute altitude or directly carried out draining.
5. according to the foundation pit supporting method in the claim 2, it is characterized in that: the rock ballast of backfill is grating grit stone or a graded broken stone preferably in the Step II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104628374A CN102587385A (en) | 2011-12-30 | 2011-12-30 | Foundation pit supporting method for sludge-exchanged and filled soft soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104628374A CN102587385A (en) | 2011-12-30 | 2011-12-30 | Foundation pit supporting method for sludge-exchanged and filled soft soil |
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| CN102587385A true CN102587385A (en) | 2012-07-18 |
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| CN2011104628374A Pending CN102587385A (en) | 2011-12-30 | 2011-12-30 | Foundation pit supporting method for sludge-exchanged and filled soft soil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669373A (en) * | 2013-09-25 | 2014-03-26 | 河海大学 | Method for consolidating deep soft foundation |
| CN104947679A (en) * | 2015-05-07 | 2015-09-30 | 中国建筑第八工程局有限公司 | Earth excavation method of deep and large foundation pit of adjacent building structures |
| CN110284432A (en) * | 2019-06-04 | 2019-09-27 | 中交路桥建设有限公司 | A kind of high roadbed area first applies fills out abutment construction method afterwards |
| CN110295606A (en) * | 2019-07-05 | 2019-10-01 | 广州穗岩土木科技股份有限公司 | A kind of foundation pit interlocking pile water stop construction method |
| CN112359890A (en) * | 2020-11-11 | 2021-02-12 | 中国电建集团华东勘测设计研究院有限公司 | Earth-rock dam foundation geological defect silt squeezing and filling changing treatment method |
| CN114232397A (en) * | 2021-11-29 | 2022-03-25 | 国网北京市电力公司 | Foundation replacement method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730841A (en) * | 2005-08-05 | 2006-02-08 | 贾燎 | Slope support method by compacting soil-lime to form cushion solid |
| CN101041955A (en) * | 2007-04-17 | 2007-09-26 | 张志铁 | Large-area soft foundation soil bag and filling composite consolidation method |
| CN201024416Y (en) * | 2007-04-17 | 2008-02-20 | 张志铁 | Large area soft foundation soil bag field reinforced structure |
| JP2011042992A (en) * | 2009-08-21 | 2011-03-03 | Shimizu Corp | Earth retaining method and earth retaining self-supporting frame |
| RU2414562C1 (en) * | 2009-10-26 | 2011-03-20 | Андрей Алексеевич Павлов | Method to excavate foundation pit when doing emergency works at subsurface structures |
-
2011
- 2011-12-30 CN CN2011104628374A patent/CN102587385A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730841A (en) * | 2005-08-05 | 2006-02-08 | 贾燎 | Slope support method by compacting soil-lime to form cushion solid |
| CN101041955A (en) * | 2007-04-17 | 2007-09-26 | 张志铁 | Large-area soft foundation soil bag and filling composite consolidation method |
| CN201024416Y (en) * | 2007-04-17 | 2008-02-20 | 张志铁 | Large area soft foundation soil bag field reinforced structure |
| JP2011042992A (en) * | 2009-08-21 | 2011-03-03 | Shimizu Corp | Earth retaining method and earth retaining self-supporting frame |
| RU2414562C1 (en) * | 2009-10-26 | 2011-03-20 | Андрей Алексеевич Павлов | Method to excavate foundation pit when doing emergency works at subsurface structures |
Non-Patent Citations (1)
| Title |
|---|
| 吴书义等: "软土基坑换填法支护施工技术研究", 《青岛理工大学学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669373A (en) * | 2013-09-25 | 2014-03-26 | 河海大学 | Method for consolidating deep soft foundation |
| CN103669373B (en) * | 2013-09-25 | 2015-11-25 | 河海大学 | A kind of method that deep soft soil foundation is reinforced |
| CN104947679A (en) * | 2015-05-07 | 2015-09-30 | 中国建筑第八工程局有限公司 | Earth excavation method of deep and large foundation pit of adjacent building structures |
| CN104947679B (en) * | 2015-05-07 | 2017-06-16 | 中国建筑第八工程局有限公司 | Close to the earthwork digging method of construction of structures deep big foundation pit |
| CN110284432A (en) * | 2019-06-04 | 2019-09-27 | 中交路桥建设有限公司 | A kind of high roadbed area first applies fills out abutment construction method afterwards |
| CN110295606A (en) * | 2019-07-05 | 2019-10-01 | 广州穗岩土木科技股份有限公司 | A kind of foundation pit interlocking pile water stop construction method |
| CN112359890A (en) * | 2020-11-11 | 2021-02-12 | 中国电建集团华东勘测设计研究院有限公司 | Earth-rock dam foundation geological defect silt squeezing and filling changing treatment method |
| CN114232397A (en) * | 2021-11-29 | 2022-03-25 | 国网北京市电力公司 | Foundation replacement method |
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Application publication date: 20120718 |