CN107059940A - Close on the guard method of deep basal pit existing building shallow foundation - Google Patents
Close on the guard method of deep basal pit existing building shallow foundation Download PDFInfo
- Publication number
- CN107059940A CN107059940A CN201710056238.XA CN201710056238A CN107059940A CN 107059940 A CN107059940 A CN 107059940A CN 201710056238 A CN201710056238 A CN 201710056238A CN 107059940 A CN107059940 A CN 107059940A
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- CN
- China
- Prior art keywords
- existing building
- foundation
- deep
- building
- guard method
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
Abstract
The present invention relates to building enclosure field, specifically a kind of guard method for closing on deep basal pit existing building shallow foundation；It is characterized in that：Including deep foundation pit support；Partition wall is set between deep foundation pit supporting structure and existing building shallow foundation；Two fluid grouting is carried out between partition wall and existing building；Building inclination is monitored.The protection to existing building shallow foundation so can be achieved by setting partition wall between deep basal pit and the shallow foundation of existing building and carrying out two fluid grouting in the present invention；Partition wall in this guard method can avoid influence of the land movement with sedimentation to building, and two fluid grouting can improve building shallow soil strength nearby, and then building basis is protected.
Description
Technical field
The present invention relates to building enclosure field, specifically a kind of protection side for closing on deep basal pit existing building shallow foundation
Method.
Background technology
With the exploitation and a large amount of construction of skyscraper of urban underground space, deep-foundation pit engineering is emerged in multitude, its
Scale and cutting depth are being continuously increased.Due to the limitation of a variety of conditions, many deep-foundation pit engineerings are located in intensive groups of building, its
Middle part foundation ditch is close to the basis of existing building.The excavation of foundation ditch is not only related to the safety of foundation ditch in itself, and is related to
The safety of its existing building being close to and normally use.If not protected to the basis of existing building, excavation of foundation pit
Caused deformation has the differential settlement for causing in hole and closing on existing building basis very much, and then causes to close on existing building
Tilt, ftracture, or even collapse, the safety of life and property to the people causes loss difficult to the appraisal.
The content of the invention
Deep basal pit existing building shallow foundation is closed on it is an object of the invention to overcome the deficiencies of the prior art and provide one kind
Guard method, it can effectively protect the safety of surrounding deep foundation pit existing building.
In order to achieve the above object, the present invention is realized in：
A kind of guard method for closing on deep basal pit existing building shallow foundation, including
Step 1, deep foundation pit support：By design drawing requirement, deep foundation pit supporting structure is constructed；
Step 2, between deep foundation pit supporting structure and existing building shallow foundation partition wall is set：Using solid matter cast-in-situ bored pile
As partition wall, the depth of cast-in-situ bored pile must be more than depth at least more than the 2m of deep foundation pit supporting structure；
Step 3, two fluid grouting is carried out between partition wall and existing building：Cement mortar is made using portland cement and water,
Cement mortar and waterglass are admixed, the presetting period for controlling admixture is 0.5min ~ 1.5min；The mass ratio of admixture is：Silicon
Acid salt cement：Water：Waterglass is 1：0.5：0.05；
Step 4, building inclination monitoring：In Excavation Process, sedimentation and inclination to closing on deep basal pit existing building
It is monitored, if building inclination is excessive or Ramp rates increase, must stops excavating immediately.
The described guard method for closing on deep basal pit existing building shallow foundation, the strength grade of portland cement is
42.5。
The described guard method for closing on deep basal pit existing building shallow foundation, enters between partition wall and existing building
The row of row one, two row or multi-row two fluid grouting.
The described guard method for closing on deep basal pit existing building shallow foundation, it is characterized in that：Cement mortar is mixed with waterglass
With the one or more in middle addition flyash, slag, volcanic ash, its gross mass is no more than the 10% of cement quality.
The present invention between deep basal pit and the shallow foundation of existing building by setting partition wall and carrying out two fluid grouting, such as
This can realize the protection to existing building shallow foundation；Partition wall in this guard method can avoid land movement with sedimentation to building
The influence of thing is built, two fluid grouting can improve building shallow soil strength nearby, and then building basis is protected.
Embodiment
The present invention is further illustrated below by way of specific embodiment.
A kind of guard method for closing on deep basal pit existing building shallow foundation, including
Step 1, deep foundation pit support：By design drawing requirement, deep foundation pit supporting structure is constructed；
Step 2, between deep foundation pit supporting structure and existing building shallow foundation partition wall is set：Using solid matter cast-in-situ bored pile
As partition wall, the depth of cast-in-situ bored pile must be more than depth at least more than the 2m of deep foundation pit supporting structure；
Step 3, two fluid grouting is carried out between partition wall and existing building：Cement mortar is made using portland cement and water,
Cement mortar and waterglass are admixed, the presetting period for controlling admixture is 0.5min ~ 1.5min；The mass ratio of admixture is：Silicon
Acid salt cement：Water：Waterglass is 1：0.5：0.05；
Step 4, building inclination monitoring：In Excavation Process, sedimentation and inclination to closing on deep basal pit existing building
It is monitored, if building inclination is excessive or Ramp rates increase, must stops excavating immediately.
The described guard method for closing on deep basal pit existing building shallow foundation, the strength grade of portland cement is
42.5。
The described guard method for closing on deep basal pit existing building shallow foundation, enters between partition wall and existing building
The row of row one, two row or multi-row two fluid grouting.
The described guard method for closing on deep basal pit existing building shallow foundation, it is characterized in that：Cement mortar is mixed with waterglass
With the one or more in middle addition flyash, slag, volcanic ash, its gross mass is no more than the 10% of cement quality.
The present invention between deep basal pit and the shallow foundation of existing building by setting partition wall and carrying out two fluid grouting, such as
This can realize the protection to existing building shallow foundation；Partition wall in this guard method can avoid land movement with sedimentation to building
The influence of thing is built, two fluid grouting can improve building shallow soil strength nearby, and then building basis is protected.
Claims (4)
1. a kind of guard method for closing on deep basal pit existing building shallow foundation, it is characterized in that：Including
Step 1, deep foundation pit support：By design drawing requirement, deep foundation pit supporting structure is constructed；
Step 2, between deep foundation pit supporting structure and existing building shallow foundation partition wall is set：Using solid matter cast-in-situ bored pile
As partition wall, the depth of cast-in-situ bored pile must be more than depth at least more than the 2m of deep foundation pit supporting structure；
Step 3, two fluid grouting is carried out between partition wall and existing building：Cement mortar is made using portland cement and water,
Cement mortar and waterglass are admixed, the presetting period for controlling admixture is 0.5min ~ 1.5min；The mass ratio of admixture is：Silicon
Acid salt cement：Water：Waterglass is 1：0.5：0.05；
Step 4, building inclination monitoring：In Excavation Process, sedimentation and inclination to closing on deep basal pit existing building
It is monitored, if building inclination is excessive or Ramp rates increase, must stops excavating immediately.
2. the guard method according to claim 1 for closing on deep basal pit existing building shallow foundation, it is characterized in that：Silicate
The strength grade of cement is 42.5.
3. the guard method according to claim 1 for closing on deep basal pit existing building shallow foundation, it is characterized in that：In cut-off
A row, two row or multi-row two fluid grouting are carried out between wall and existing building.
4. the guard method according to claim 1 for closing on deep basal pit existing building shallow foundation, it is characterized in that：Cement mortar
The one or more added in being admixed with waterglass in flyash, slag, volcanic ash, its gross mass is no more than cement quality
10%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710056238.XA CN107059940A (en) | 2017-01-25 | 2017-01-25 | Close on the guard method of deep basal pit existing building shallow foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710056238.XA CN107059940A (en) | 2017-01-25 | 2017-01-25 | Close on the guard method of deep basal pit existing building shallow foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107059940A true CN107059940A (en) | 2017-08-18 |
Family
ID=59598712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710056238.XA Pending CN107059940A (en) | 2017-01-25 | 2017-01-25 | Close on the guard method of deep basal pit existing building shallow foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107059940A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109837911A (en) * | 2019-03-18 | 2019-06-04 | 辽宁工程技术大学 | A method of Foundation Pit Support Design is carried out using two fluid grouting |
| CN111058454A (en) * | 2019-11-29 | 2020-04-24 | 天津建岩岩土工程有限公司 | Construction protection method on one side of existing building |
Citations (6)
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|---|---|---|---|---|
| CN102061697A (en) * | 2010-11-25 | 2011-05-18 | 中铁六局集团有限公司广州分公司 | Method for treating uneven settlement of building |
| CN102296631A (en) * | 2011-05-31 | 2011-12-28 | 天津二十冶建设有限公司 | Top-down construction method of cyclone well |
| CN103195069A (en) * | 2013-04-01 | 2013-07-10 | 北京工业大学 | Method for shoring prestressed double-row-pile strong-constraint deep foundation pit |
| CN104612160A (en) * | 2014-11-18 | 2015-05-13 | 中大建设有限公司 | Maintenance structure for foundation pit next to existing building and construction method |
| JP2015152348A (en) * | 2014-02-12 | 2015-08-24 | アズビル株式会社 | Capacitance type pressure sensor |
| CN105649089A (en) * | 2016-01-13 | 2016-06-08 | 江西博慧工程技术服务有限公司 | Construction method for excavating foundation pit close to existing shallow foundation protection structure |
-
2017
- 2017-01-25 CN CN201710056238.XA patent/CN107059940A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061697A (en) * | 2010-11-25 | 2011-05-18 | 中铁六局集团有限公司广州分公司 | Method for treating uneven settlement of building |
| CN102296631A (en) * | 2011-05-31 | 2011-12-28 | 天津二十冶建设有限公司 | Top-down construction method of cyclone well |
| CN103195069A (en) * | 2013-04-01 | 2013-07-10 | 北京工业大学 | Method for shoring prestressed double-row-pile strong-constraint deep foundation pit |
| JP2015152348A (en) * | 2014-02-12 | 2015-08-24 | アズビル株式会社 | Capacitance type pressure sensor |
| CN104612160A (en) * | 2014-11-18 | 2015-05-13 | 中大建设有限公司 | Maintenance structure for foundation pit next to existing building and construction method |
| CN105649089A (en) * | 2016-01-13 | 2016-06-08 | 江西博慧工程技术服务有限公司 | Construction method for excavating foundation pit close to existing shallow foundation protection structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109837911A (en) * | 2019-03-18 | 2019-06-04 | 辽宁工程技术大学 | A method of Foundation Pit Support Design is carried out using two fluid grouting |
| CN109837911B (en) * | 2019-03-18 | 2020-11-03 | 辽宁工程技术大学 | Method for carrying out foundation pit supporting design by using double-liquid grouting |
| CN111058454A (en) * | 2019-11-29 | 2020-04-24 | 天津建岩岩土工程有限公司 | Construction protection method on one side of existing building |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170818 |