CN109537598A - Control excavation of foundation pit deformation method - Google Patents
Control excavation of foundation pit deformation method Download PDFInfo
- Publication number
- CN109537598A CN109537598A CN201811481134.4A CN201811481134A CN109537598A CN 109537598 A CN109537598 A CN 109537598A CN 201811481134 A CN201811481134 A CN 201811481134A CN 109537598 A CN109537598 A CN 109537598A
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- CN
- China
- Prior art keywords
- foundation pit
- deformation
- underground installation
- excavation
- stabilization zone
- 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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of control excavation of foundation pit deformation methods comprising following steps: S1, excavating to the earthwork in foundation pit, while detecting the deformation of the underground installation below the foundation pit；S2, the deformation data of the underground installation is obtained to determine whether to generate excessive deformation, when the underground installation determines that deformation values are more than permissible value, grouting equipment carries out slip casting to stabilization zone, and the stabilization zone is between the foundation pit and the underground installation；When the underground installation determines that deformation values are no more than permissible value, then continue to excavate the earthwork in the foundation pit, until the earth excavation in the foundation pit is completed.Based on the principle of severe compensation, so that the promotion of slip casting severe compensates soil body off-load amount caused by excavation of foundation pit, to prevent the floating of underground installation from deforming, it is ensured that the safety of underground installation.In digging process grouting cost can be advantageously reduced while control underground installation is safe according to deformation monitoring value dynamic adjustment grouting equipment.
Description
Technical field
The present invention relates to a kind of civil construction field, in particular to a kind of control excavation of foundation pit deformation method.
Background technique
Construction of future cities will develop towards compact and intensive, efficient green direction, need to reinforce the space multistory to city, put down
The planning and control of face harmony etc., adhere to Compact development, establish " shrewdness increases ", " Compact plasma toroid " theory.In underground
It needs to focus on intensive use potentials in terms of space utilization, thus generates above the underground installations such as a large amount of existing tunnels and side carries out foundation pit and opens
The case of digging, special when hole bottom is closer apart from tunnel, big off-load amount caused after a large amount of soil excavations will cause inside foundation pit
The underground installations such as existing tunnel generate deformation of floating, to cause structural joint to open, cracking even damages.
Current control method is to be subtracted by the cement injection in the soil body after waiting cement slurries to harden with promoting soil body rigidity
The floating deformation of few underground installation, but effect is unobvious, underground installation still can generate after a large amount of soil excavations inside foundation pit
It floats and deforms, cause structural joint to open, cracking even damages.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome underground installation in the prior art can generate floating deformation etc.
Defect provides a kind of control excavation of foundation pit deformation method.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of control excavation of foundation pit deformation method, it is characterized in that comprising following steps:
S1, the earthwork in foundation pit is excavated, while detects the deformation of the underground installation below the foundation pit；
S2, the deformation data of the underground installation is obtained to determine whether to generate excessive deformation, when the underground installation is sentenced
When determining deformation values more than permissible value, grouting equipment carries out slip casting to stabilization zone, and the stabilization zone is located at the foundation pit with described
Between lower facility；
When the underground installation determines that deformation values are no more than permissible value, then continue to open the earthwork in the foundation pit
It digs, until the earth excavation in the foundation pit is completed.
Preferably, when the underground installation determines that deformation values are more than permissible value, stopping excavation in the step S2 and setting
It is standby that the earthwork in the foundation pit is excavated, start the grouting equipment and slip casting is carried out to the stabilization zone；
When the underground installation determine deformation values be no more than permissible value when, stop the grouting equipment to the stabilization zone into
Row slip casting starts the excavation equipment and excavates to the earthwork in the foundation pit.
Preferably, in the step S1, deformation monitoring device, the deformation monitoring dress are equipped in the underground installation
Set the deformation for monitoring the underground installation.
Preferably, the quantity of the grouting equipment and the stabilization zone is two, and two stabilization zones are located at describedly
The two sides of lower facility.
Preferably, being comprised the following steps that before the step S1
S1.0, building enclosure is built in the two sides of the foundation pit.
Preferably, being comprised the following steps that before the step S1, after the step S1.0
S1.1, the surface for setting up the grouting equipment to the stabilization zone, the Grouting Pipe on the grouting equipment is inserted
Enter to the stabilization zone.
It is moved preferably, the Grouting Pipe is inserted into the stabilization zone and can go up and down along the length direction of the Grouting Pipe
It is dynamic.
Preferably, the stabilization zone is located in the building enclosure.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
Control excavation of foundation pit deformation method of the invention, in Excavation Process by detect underground installation deformation come
Regulate and control slip casting, based on the principle of severe compensation, so that the promotion of slip casting severe compensates soil body off-load amount caused by excavation of foundation pit,
To prevent the floating of underground installation from deforming, it is ensured that the safety of underground installation.Meanwhile it can be according to deformation monitoring in digging process
Value dynamic adjustment grouting equipment, advantageously reduces grouting cost while control underground installation is safe.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the control excavation of foundation pit deformation of the embodiment of the present invention.
Fig. 2 is the flow chart of the control excavation of foundation pit deformation method of the embodiment of the present invention.
Description of symbols:
Foundation pit 1
Underground installation 2
Grouting equipment 3
Grouting Pipe 31
Stabilization zone 4
Deformation monitoring device 5
Building enclosure 6
Specific embodiment
Illustrate below by the mode of embodiment and completely the present invention in conjunction with attached drawing to become apparent from, but therefore not incite somebody to action this
It invents among the scope of embodiments being limited in.
As depicted in figs. 1 and 2, the control excavation of foundation pit deformation method of the embodiment of the present invention comprising following steps:
Step S1, the earthwork in foundation pit 1 is excavated, while detects the deformation of the underground installation 2 of 1 lower section of foundation pit.
In this step, the earthwork in foundation pit 1 is excavated out, and the lower section of foundation pit 1 is neighbouring to have underground installation 2.Work as the earthwork
After excavating, soil body weight will be reduced in foundation pit 1, can cause soil layer around and the underground installation of lower section 2 and neighbouring underground
Facility 2 generates floating, damages more than will cause underground installation 2 after certain magnitude.So being needed simultaneously during foundation pit 1 excavates
The deformation for detecting underground installation 2 avoids damaging to underground installation 2.
Step S2, the deformation data of underground installation 2 is obtained to determine whether to generate excessive deformation, when underground installation 2 determines
When deformation values are more than permissible value, grouting equipment 3 carries out slip casting to stabilization zone 4, stabilization zone 4 be located at foundation pit 1 and underground installation 2 it
Between；When underground installation 2 determines that deformation values are no more than permissible value, then continue to excavate the earthwork in foundation pit 1, until foundation pit
Earth excavation in 1 is completed.
In this step, the deformation data of real-time detection underground installation 2 determines whether to generate excessive deformation, avoids over the ground
Lower facility 2 damages.If underground installation 2 determines that always deformation values are no more than permissible value, and the excavation of foundation pit 1 is shown in
Bottom, then earth excavation terminates, and does not damage to underground installation 2.If underground installation 2 determines that deformation values are more than permissible value,
Then start grouting equipment 3 and slip casting is carried out to stabilization zone 4, i.e., carry out slip casting operation in underground installation 2, until underground installation 2 determines
When deformation values are no more than permissible value, stop grouting equipment 3 and slip casting operation is carried out to stabilization zone 4.
Regulate and control slip casting by detecting the deformation of underground installation 2 in 1 digging process of foundation pit, the original based on severe compensation
Reason so that the promotion of slip casting severe come compensate foundation pit 1 excavate caused by soil body off-load amount, to prevent the floating of underground installation 2
Deformation, it is ensured that the safety of underground installation 2.Meanwhile grouting equipment 3 can be adjusted according to deformation monitoring value dynamic in digging process,
Grouting cost is advantageously reduced while control underground installation 2 is safe.
In step sl, deformation monitoring device 5 can be equipped in underground installation 2, deformation monitoring device 5 is for monitoring ground
The deformation of lower facility 2.It is mounted in underground installation 2 by deformation monitoring device 5, it is dynamic by the monitor value of deformation monitoring device 5
State adjustment grouting equipment 3 cut-off and watt level.
In step s 2, when underground installation 2 determines that deformation values are more than permissible value, stop excavation equipment in foundation pit 1
The earthwork is excavated, and starting grouting equipment 3 carries out slip casting to stabilization zone 4；When underground installation 2 determines that deformation values are no more than permissible value
When, stop grouting equipment 3 and slip casting is carried out to stabilization zone 4, starting excavation equipment excavates the earthwork in foundation pit 1.If underground
When facility 2 determines that deformation values are more than permissible value, stops excavation equipment immediately and the earthwork in foundation pit 1 is excavated, effectively avoid
Underground installation 2 further generates deformation of floating, and carries out slip casting to stabilization zone 4 by starting grouting equipment 3, passes through injecting paste material
The soil body off-load amount caused by excavating in the compensation foundation pit 1 of weight, effectively avoids damaging to underground installation 2.Until ground
When lower facility 2 determines that deformation values are no more than permissible value, then stops grouting equipment 3 and slip casting is carried out to stabilization zone 4, start excavation equipment
Continue to excavate the earthwork in foundation pit 1.
Wherein, injecting paste material can be high specific gravity injecting paste material, and the severe of high specific gravity injecting paste material is natural earth severe
It 1.1~1.5 times, can be produced by the way that the high specific gravity materials such as steel-making slag powder are added in conventional injecting paste material.
The main body of 4 range of stabilization zone is located at foundation pit 1 and excavates in range in the soil body, most of soil after the completion of foundation pit 1 excavates
Body is removed, and will not be runed the later period and be had an impact.The quantity of grouting equipment 3 and stabilization zone 4 all can be two, and two add
Gu the two sides of the facility 2 located underground of area 4.The range determination of stabilization zone 4 should comprehensively consider 1 discharging quantity of foundation pit and later period structure is returned and built
Anti-floating requires comprehensive determination afterwards, can be according to the monitor value for the deformation monitoring device 5 being installed in underground installation 2 in digging process
Dynamic adjusts.
Include step S1.0 before step S1: step S1.0 is to build building enclosure 6 in the two sides of foundation pit 1.At this
In step, building enclosure 6 is built in the two sides of foundation pit 1 before the excavation of foundation pit 1, protective action is played, effectively prevents the soil body
Phenomena such as collapsing.Wherein, stabilization zone 4 is located in building enclosure 6, injects injecting paste material in stabilization zone 4, the soil in foundation pit 1
Body can play the role of bracing against during being excavated to building enclosure 6, strengthen the structural strength of building enclosure 6, keep away
Exempt from building enclosure 6 to collapse phenomenon.
Before step S1, include step S1.1 after step S1.0: step S1.1 be set up grouting equipment 3 to reinforcing
Grouting Pipe 31 on grouting equipment 3 is inserted into stabilization zone 4 by the surface in area 4.Grouting equipment 3 will be infused by Grouting Pipe 31
Pulp material is injected into stabilization zone 4, is realized by grouting equipment 3 to slip casting in stabilization zone 4.
Grouting Pipe 31 is inserted into stabilization zone 4 and can be along the length direction lifting moving of Grouting Pipe 31.Pass through Grouting Pipe 31
Lifting moving adjust the height of injection, to realize that the range of stabilization zone 4 is bigger, and significantly facilitate in grouting equipment 3
Slip casting.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (8)
1. a kind of control excavation of foundation pit deformation method, which is characterized in that itself the following steps are included:
S1, the earthwork in foundation pit is excavated, while detects the deformation of the underground installation below the foundation pit；
S2, the deformation data of the underground installation is obtained to determine whether to generate excessive deformation, when the underground installation determines to become
When shape value is more than permissible value, grouting equipment carries out slip casting to stabilization zone, and the stabilization zone is located at the foundation pit and with described divides into
Between applying；
When the underground installation determines that deformation values are no more than permissible value, then continue to excavate the earthwork in the foundation pit,
Until the earth excavation in the foundation pit is completed.
2. control excavation of foundation pit deformation method as described in claim 1, which is characterized in that in the step S2, when described
When underground installation determines that deformation values are more than permissible value, stops excavation equipment and the earthwork in the foundation pit is excavated, start institute
It states grouting equipment and slip casting is carried out to the stabilization zone；
When the underground installation determines that deformation values are no more than permissible value, stops the grouting equipment and the stabilization zone is infused
Slurry, starts the excavation equipment and excavates to the earthwork in the foundation pit.
3. control excavation of foundation pit deformation method as described in claim 1, which is characterized in that in the step S1, described
Deformation monitoring device is equipped in underground installation, the deformation monitoring device is used to monitor the deformation of the underground installation.
4. control excavation of foundation pit deformation method as described in claim 1, which is characterized in that the grouting equipment and the reinforcing
The quantity in area is two, and two stabilization zones are located at the two sides of the underground installation.
5. control excavation of foundation pit deformation method as described in claim 1, which is characterized in that include before the step S1
Following steps:
S1.0, building enclosure is built in the two sides of the foundation pit.
6. control excavation of foundation pit deformation method as claimed in claim 5, which is characterized in that before the step S1, described
It is comprised the following steps that after step S1.0
S1.1, the surface for setting up the grouting equipment to the stabilization zone, the Grouting Pipe on the grouting equipment is inserted into
In the stabilization zone.
7. control excavation of foundation pit deformation method as claimed in claim 6, which is characterized in that the Grouting Pipe is inserted into described add
Gu Qu simultaneously can be along the length direction lifting moving of the Grouting Pipe.
8. control excavation of foundation pit deformation method as claimed in claim 5, which is characterized in that the stabilization zone is located at described go along with sb. to guard him
In structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811481134.4A CN109537598A (en) | 2018-12-05 | 2018-12-05 | Control excavation of foundation pit deformation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811481134.4A CN109537598A (en) | 2018-12-05 | 2018-12-05 | Control excavation of foundation pit deformation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109537598A true CN109537598A (en) | 2019-03-29 |
Family
ID=65852813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811481134.4A Withdrawn CN109537598A (en) | 2018-12-05 | 2018-12-05 | Control excavation of foundation pit deformation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109537598A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775687A (en) * | 2022-05-23 | 2022-07-22 | 中铁上海设计院集团有限公司 | Compensation type construction structure for underground engineering construction and construction method thereof |
| KR102476570B1 (en) * | 2022-05-26 | 2022-12-13 | 주식회사 대한측량기술 | Underground facilities detection system for constructing database of geographic information system using mms |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061923A (en) * | 2010-11-28 | 2011-05-18 | 山东科技大学 | Tunnel construction method capable of protecting existing building |
| CN102828517A (en) * | 2012-08-30 | 2012-12-19 | 中铁十三局集团第三工程有限公司 | Hierarchical control construction method of foundation pit excavation at entrance and exit of station |
| CN103758133A (en) * | 2014-01-13 | 2014-04-30 | 河海大学 | Deep soft soil foundation pit reinforcement method |
| CN105926633A (en) * | 2016-03-25 | 2016-09-07 | 曹信江 | Method for protecting surrounding soil or building in foundation pit construction |
| CN108755699A (en) * | 2018-06-07 | 2018-11-06 | 上海勘察设计研究院(集团)有限公司 | The deformation control method and device of a kind of foundation pit periphery soil body |
-
2018
- 2018-12-05 CN CN201811481134.4A patent/CN109537598A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061923A (en) * | 2010-11-28 | 2011-05-18 | 山东科技大学 | Tunnel construction method capable of protecting existing building |
| CN102828517A (en) * | 2012-08-30 | 2012-12-19 | 中铁十三局集团第三工程有限公司 | Hierarchical control construction method of foundation pit excavation at entrance and exit of station |
| CN103758133A (en) * | 2014-01-13 | 2014-04-30 | 河海大学 | Deep soft soil foundation pit reinforcement method |
| CN105926633A (en) * | 2016-03-25 | 2016-09-07 | 曹信江 | Method for protecting surrounding soil or building in foundation pit construction |
| CN108755699A (en) * | 2018-06-07 | 2018-11-06 | 上海勘察设计研究院(集团)有限公司 | The deformation control method and device of a kind of foundation pit periphery soil body |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775687A (en) * | 2022-05-23 | 2022-07-22 | 中铁上海设计院集团有限公司 | Compensation type construction structure for underground engineering construction and construction method thereof |
| CN114775687B (en) * | 2022-05-23 | 2024-08-09 | 中铁上海设计院集团有限公司 | Compensation type construction structure for underground engineering construction and construction method thereof |
| KR102476570B1 (en) * | 2022-05-26 | 2022-12-13 | 주식회사 대한측량기술 | Underground facilities detection system for constructing database of geographic information system using mms |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20190329 |