CN107724399A - The method that medium region of FuShui excavates limited location deep pit construction - Google Patents
The method that medium region of FuShui excavates limited location deep pit construction Download PDFInfo
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- CN107724399A CN107724399A CN201710525706.3A CN201710525706A CN107724399A CN 107724399 A CN107724399 A CN 107724399A CN 201710525706 A CN201710525706 A CN 201710525706A CN 107724399 A CN107724399 A CN 107724399A
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- layer
- foundation ditch
- stull
- fushui
- excavates
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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
- 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
- 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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The method that medium region of FuShui excavates limited location deep pit construction, it comprises the following steps：(1) precipitation well point is arranged, draw water lowering of watertable；(2) first layer foundation ditch is excavated, first of horizontal support is set；Then, continue to dig to first layer design of foundation pit depth；(3) horizontal breast boards, vertical back cord and stull are installed, form first layer gib system；(4) next layer of excavation of foundation pit, horizontal breast boards, vertical back cord and stull are installed, form next layer of gib system；(5) according to whole design of foundation pit depth, by being constructed successively to next layer of foundation ditch circulation the step of above-mentioned stage excavation foundation ditch, dig to the designed elevation of whole foundation ditch, form provisional integer support system.Invention increases the stability of support system and foundation ditch；Rolled steel dosage is few, and construction cost is low；Easy for construction, service speed is fast, it is possible to increase speed of application is fast；Pollution of the base to surrounding environment is reduced, there is good environmental benefit；Structures around are influenceed small.
Description
(1) technical field：
It is specifically a kind of to be used for the limited location of medium region of FuShui excavation the present invention relates to Municipal Engineering Construction field
The method of deep pit construction.
(2) background technology：
At present, in medium hydrous fluids, fine sand, silty clay geology, especially level of ground water is by the larger excavation of seasonal effect
Depth up to 5m-8m, by earth clearance influenceed can not the construction method of deep foundation ditch of slope construction location mainly inserted using large area
Beating the forms of construction work such as Larsen steel sheet pile, diaphragm wall coordinates pumping for water pump to excavate.But because level of ground water is by seasonal effect is big, steel
The factors such as sheet pile and construction of diaphragm wall complexity so that foundation pit construction operation effect is slow, delays the duration, improves cost.
In existing construction method, as taken in a kind of rich water soft clay area deep basal pit covered back-digging construction methods of CN106320377A-
It is the mode of covered back-digging, using clay model and stull progress excavation of foundation pit and concreting, such a method construction operation complexity,
Difficulty is big, long in time limit, and construction cost is very high.Construction method disclosed by the invention can be realized medium with the cost of minimum
Region of FuShui excavates limited location deep pit construction, and construction technology is simple, safety, workable, is easy to quality control
System.
(3) content of the invention：
The shortcomings that it is an object of the invention to overcome prior art, there is provided a kind of construction technology is simple, safety, operability
By force, it is easy to quality control and method that the low medium region of FuShui of cost excavates limited location deep pit construction.
The present invention, which adopts the following technical scheme that, realizes its goal of the invention.
The method that the medium region of FuShui of the present invention excavates limited location deep pit construction, it comprises the following steps：
(1) precipitation well point is arranged according to design requirement, persistently drawn water lowering of watertable using water pump；
(2) first layer foundation ditch is excavated, is dug to setting first of horizontal support at the design and installation of first of horizontal support；So
Afterwards, continue to dig to first layer design of foundation pit depth；
(3) horizontal breast boards, vertical back cord and stull are installed according to designed distance, forms first layer gib body
System；
(4) next layer of excavation of foundation pit, dig to next layer of design of foundation pit depth, and install horizontal breast boards, vertical back cord and
Stull, form next layer of gib system；
(5) according to whole design of foundation pit depth, by being circulated successively to next layer of foundation ditch the step of above-mentioned stage excavation foundation ditch
Construction, digs to the designed elevation of whole foundation ditch, forms provisional integer support system.
The horizontal support, gib system and precipitation well point position, arrangement spacing and all parts material
Calculating is designed according to geologic prospect file.
The precipitation well point is arranged in foundation ditch periphery and inside.
When the installation horizontal breast boards of next layer of foundation ditch, vertical back cord and stull, while remove last layer and prop up temporarily
The vertical back cord of watch box system and stull.
The vertical back cord of the last layer gib system and stull are moved downward to next layer of gib system, on
One layer of gib system sets up the horizontal breast boards of new stull support last layer gib system.
First layer foundation ditch is dug to 0.5m~1.0m below first of horizontal support in the step (2).
The next layer of foundation ditch is dug to 0.5m~1.0m below the stull of last layer gib system.
The foundation ditch of the stage excavation, the depth of next layer of foundation ditch is on the basis of the position of last layer stull.
The horizontal breast boards of the gib system is by between vertical back cord, stull pressure and soil and horizontal breast boards
Frictional force is fixed.
Bracket is provided with the vertical back cord, stull is placed on bracket.
The bracket uses triangle voussoir.
In the step (5) after the completion of provisional integer support system, engineering structure construction, completion to be tested, symbol are carried out
After closing quality standard, foundation ditch backfill is carried out.
In the foundation ditch backfilling process provisional integer support system, horizontal breast boards and the vertical back of the body are removed according to opposite sequence
It is stupefied to be extracted with machinery.
The beneficial effects of the invention are as follows：
(1) by the way of horizontal breast boards coordinates well-points dewatering, persistently drawn water lowering of watertable, increased using water pump
Add the internal friction angle of soil layer, improve the physical property of soil layer, reduce the active earth pressure of soil layer, add support system and foundation ditch
Stability.
(2) horizontal breast boards need not all arrange that the satisfactory timber of intensity and its may be selected in stull along foundation ditch face
His material, rolled steel dosage is few, and construction cost is low.
(3) horizontal breast boards is fixed by the frictional force between vertical back cord, stull pressure and soil and horizontal breast boards, horizontal
Breast boards, vertical back cord need not be squeezed into soil, and easy for construction, service speed is fast, it is possible to increase speed of application is fast.
(4) support system entirety stress is more reasonable.
(5) reduce in Excavation Process, pollution of the mud to surrounding environment, there is good environmental benefit.
(6) it is small on the influence of structures around, it is practical.
(4) illustrate：
Fig. 1 is a kind of method that limited location deep pit construction is excavated for medium region of FuShui using the present invention
Mixture proportioning in construction；
Fig. 2 is B-B diagrammatic cross-sections shown in Fig. 1；
Fig. 3-1, Fig. 3-2 are the drawing of A shown in Fig. 2.
In figure：1 is horizontal breast boards, and 2 be vertical back cord, and 3 be stull, and 4 be pipe of concrete, and 5 be base, and 6 be well point, 7
For bracket.
(5) embodiment：
The present invention is described in detail with reference to the accompanying drawings and detailed description.
Embodiment：As shown in Fig. 1 to Fig. 3-2, medium region of FuShui of the invention excavates limited location deep pit digging and applied
The method of work, it comprises the following steps：
(1) the clear and definite geological conditions of data that report provides is surveyed in base area, carries out the design and dewatering well of horizontal struts system
The design of point 6.
(2) surveying and locating goes out excavation of foundation pit sideline and the position of precipitation well point 6, and well point 6 is constructed, and starts to draw water.
(3) well-points dewatering carries out first layer excavation of foundation pit after two weeks, digs to setting first layer stull 3 at 0.3m-0.5m；So
After continue to dig in first layer stull 0.5m below 3, horizontal breast boards is installed according to the designed horizontal struts system of step (1)
1st, vertical back cord 2 and stull 3, first layer gib system is formed.
(4) second layer excavation of foundation pit is opened, and digs depth in second layer stull 3 (i.e. the stull 3 of first layer gib system)
Following 0.5m, horizontal breast boards 1, vertical back cord 2 and stull 3 are installed also according to the designed horizontal struts system of step (1),
Second layer gib system is formed, removes vertical back cord 2 and the stull 3 of first layer gib system.
(5) circulated according to step 4, until digging to designed elevation, form interim type integer support system.
(6) to prevent stull from coming off, 2 pieces of 10 × 10cm angle irons are welded on vertical back cord 2 as bracket 7, by stull 3
It is placed on bracket 7.
(7) after the completion of provisional integer support system, base 5 and pipe of concrete 4 is laid in bottom of foundation ditch, has been inspected,
After meeting quality standard, foundation ditch backfill is carried out.
(8) in backfilling process, provisional integer support system, horizontal breast boards and back cord machinery are removed according to opposite sequence
Extract, structure integral construction is completed.
Claims (10)
1. the method that medium region of FuShui excavates limited location deep pit construction, it is characterised in that it comprises the following steps：
(1) precipitation well point is arranged according to design requirement, persistently drawn water lowering of watertable using water pump；
(2) first layer foundation ditch is excavated, is dug to setting first of horizontal support at the design and installation of first of horizontal support；Then,
Continue to dig to first layer design of foundation pit depth；
(3) horizontal breast boards, vertical back cord and stull are installed according to designed distance, forms first layer gib system；
(4) next layer of excavation of foundation pit, dig to next layer of design of foundation pit depth, and horizontal breast boards, vertical back cord and stull be installed,
Form next layer of gib system；
(5) according to whole design of foundation pit depth, applied by being circulated successively to next layer of foundation ditch the step of above-mentioned stage excavation foundation ditch
Work, dig to the designed elevation of whole foundation ditch, form provisional integer support system.
2. the method that medium region of FuShui excavates limited location deep pit construction according to claim 1, its feature exist
In the material base area of the horizontal support, the position of gib system and precipitation well point, arrangement spacing and all parts
Matter reconnoitres file and is designed calculating.
3. the method that medium region of FuShui excavates limited location deep pit construction according to claim 1, its feature exist
Foundation ditch periphery and inside are arranged in the precipitation well point.
4. the method that medium region of FuShui excavates limited location deep pit construction according to claim 1, its feature exist
When the horizontal breast boards, vertical back cord and stull of next layer of foundation ditch of the installation, while remove last layer gib system
Vertical back cord and stull.
5. the method that medium region of FuShui excavates limited location deep pit construction according to claim 4, its feature exist
Next layer of gib system, last layer are moved downward in the vertical back cord of the last layer gib system and stull
Gib system sets up the horizontal breast boards of new stull support last layer gib system.
6. the method that medium region of FuShui excavates limited location deep pit construction according to claim 1, its feature exist
In the step（2）Middle first layer foundation ditch is dug to 0.5m~1.0m below first of horizontal support；
The next layer of foundation ditch is dug to 0.5m~1.0m below the stull of last layer gib system.
7. the method that medium region of FuShui excavates limited location deep pit construction according to claim 1, its feature exist
In the gib system horizontal breast boards by the frictional force between vertical back cord, stull pressure and soil and horizontal breast boards
It is fixed.
8. the method that medium region of FuShui excavates limited location deep pit construction according to claim 1, its feature exist
In being provided with bracket on the vertical back cord, stull is placed on bracket.
9. the method that medium region of FuShui excavates limited location deep pit construction according to claim 8, its feature exist
Triangle voussoir is used in the bracket.
10. the method that medium region of FuShui excavates limited location deep pit construction according to claim 1, its feature exist
In the step（5）In after the completion of provisional integer support system, carry out engineering structure construction, completion to be tested, meet quality
After standard, foundation ditch backfill is carried out；
Provisional integer support system is removed according to opposite sequence in the foundation ditch backfilling process, horizontal breast boards and vertical back cord are used
Machinery is extracted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710525706.3A CN107724399A (en) | 2017-06-30 | 2017-06-30 | The method that medium region of FuShui excavates limited location deep pit construction |
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| CN201710525706.3A CN107724399A (en) | 2017-06-30 | 2017-06-30 | The method that medium region of FuShui excavates limited location deep pit construction |
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| CN107724399A true CN107724399A (en) | 2018-02-23 |
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| CN201710525706.3A Pending CN107724399A (en) | 2017-06-30 | 2017-06-30 | The method that medium region of FuShui excavates limited location deep pit construction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714497A (en) * | 2019-10-17 | 2020-01-21 | 中建八局第一建设有限公司 | Underwater pumping excavation system for long-strip-shaped deep foundation pit of water-rich sand layer |
| CN113047308A (en) * | 2021-04-19 | 2021-06-29 | 陕西华山建设集团有限公司 | Supporting method for horizontal directional drilling working pit under liquid limit silt stratum |
| CN113960696A (en) * | 2021-09-22 | 2022-01-21 | 山东大学 | Method for burying field bad geologic body by comprehensive geophysical prospecting and test method |
| CN114061388A (en) * | 2021-11-27 | 2022-02-18 | 中铁四局集团第五工程有限公司 | Construction method for damping blasting of urban underground space |
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| KR20090002344A (en) * | 2007-06-28 | 2009-01-09 | (주)바로건설기술 | Land-side protection wall that use ground structure |
| CN102767186A (en) * | 2012-07-16 | 2012-11-07 | 中铁隧道集团有限公司 | Foundation pit containment structure with prestress ribs on vertical soil-retaining structure and construction method |
| CN205035812U (en) * | 2015-10-09 | 2016-02-17 | 绍兴文理学院元培学院 | Stull formula bearing structure simply fixes a position |
| CN106049505A (en) * | 2016-07-06 | 2016-10-26 | 江苏江中集团有限公司 | Construction method for deep foundation pit supporting and protecting system |
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Patent Citations (6)
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| KR20090002344A (en) * | 2007-06-28 | 2009-01-09 | (주)바로건설기술 | Land-side protection wall that use ground structure |
| CN102767186A (en) * | 2012-07-16 | 2012-11-07 | 中铁隧道集团有限公司 | Foundation pit containment structure with prestress ribs on vertical soil-retaining structure and construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714497A (en) * | 2019-10-17 | 2020-01-21 | 中建八局第一建设有限公司 | Underwater pumping excavation system for long-strip-shaped deep foundation pit of water-rich sand layer |
| CN113047308A (en) * | 2021-04-19 | 2021-06-29 | 陕西华山建设集团有限公司 | Supporting method for horizontal directional drilling working pit under liquid limit silt stratum |
| CN113960696A (en) * | 2021-09-22 | 2022-01-21 | 山东大学 | Method for burying field bad geologic body by comprehensive geophysical prospecting and test method |
| CN114061388A (en) * | 2021-11-27 | 2022-02-18 | 中铁四局集团第五工程有限公司 | Construction method for damping blasting of urban underground space |
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180223 |