CN108590680A - A kind of construction method that launching shaft foundation pit vertical section pours - Google Patents
A kind of construction method that launching shaft foundation pit vertical section pours Download PDFInfo
- Publication number
- CN108590680A CN108590680A CN201810420487.7A CN201810420487A CN108590680A CN 108590680 A CN108590680 A CN 108590680A CN 201810420487 A CN201810420487 A CN 201810420487A CN 108590680 A CN108590680 A CN 108590680A
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- China
- Prior art keywords
- pours
- construction
- side wall
- foundation pit
- bracing members
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- Pending
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- 238000010276 construction Methods 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000009415 formwork Methods 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 241001669679 Eleotris Species 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of construction method that launching shaft foundation pit vertical section pours, the construction of this foundation pit structure is divided into vertical 7 times and constructs, and steps are as follows for Specific construction：The first step, bottom slab concreting；Second step, side wall pour；Third walks, and the 5th bracing members are removed and side wall pours；4th step, the 4th bracing members are removed and side wall pours；5th step, third road bracing members are removed and side wall pours；6th step, second bracing members are removed and side wall pours；7th step removes first of steel construction and completes structure construction；The present invention is poured in launching shaft foundation pit using vertical section, it ensure that the construction of shield launching well construction is smoothed out, the construction of this foundation pit structure is divided into vertical 7 times and constructs, be gradually completing to bottom plate, side wall pour and five bracing members are removed, and complete structure construction.
Description
Technical field
The present invention relates to subway work technical fields, more specifically, it relates to which a kind of launching shaft foundation pit vertically divides
The construction method that section pours.
Background technology
Shield launching is very important link in subway work, needs manually or mechanically to cut hole in originating well construction
Door glass fiber bar stake cuts, portal poor flatness longer with clearance time, and the soil body caves in and soil erosion when originating
Risk is higher, and the waste of portal plugging material is serious.
In previous tunneling shield engineering, launching shaft generally uses shield machine bracket to support shield machine barrel, leads to
Crossing reaction frame offer thrust makes shield driving, the pre-buried ring flat-plate of portal, folding shape pressing plate and rubber curtain plate collectively constitute portal sealing
Device prevents shield machine barrel from gushing sand into the gap water burst between cylinder and portal when hole, plays the effect of sealing.But due to portal
Its own can bear limited pressure with sealing device, and in foundation pit compared with depth and the higher place of level of ground water, Water And Earth Pressures are very big, especially
It is in the pouring construction of launching shaft foundation pit, and the easy presence of mode pours and dismantling operation can not be successfully for conventional pouring
The problem of progress, influences the construction that foundation pit pours and is smoothed out.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of launching shaft foundation pit vertical section
The construction method poured, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of construction method that launching shaft foundation pit vertical section pours, this foundation pit structure construction be divided into vertical 7 times into
Row construction, steps are as follows for Specific construction：
The first step, bottom slab concreting：It is that shield well southern side portal HL2 top marks are high to pour height, and setting-up of construction joint position is bottom
Plate top 1.25m；
Second step, side wall pour：After the completion of bottom slab concreting, first step support system is set up, binds side wall reinforcing bar, formwork pours
Concrete is built, height 1.2m is poured；
Third walks, and the 5th bracing members are removed and side wall pours：The 5th bracing members are removed, basal plane is handled, sets up second
Support system is walked, side wall is bound and north and south side ring beam steel, formwork casting concrete pours height 3.59m；
4th step, the 4th bracing members are removed and side wall pours：The 4th bracing members are removed, basal plane is handled, sets up third
Support system is walked, side wall is bound and north and south side ring camber portion reinforcing bar, formwork casting concrete pours height 5.76m；
5th step, third road bracing members are removed and side wall pours：Third road bracing members are removed, basal plane is handled, sets up the 4th
Support system is walked, side wall reinforcing bar is bound, formwork casting concrete pours height 6.1m；
6th step, second bracing members are removed and side wall pours：Second bracing members are removed, basal plane is handled, sets up the 5th
Support system is walked, side wall reinforcing bar is bound, formwork casting concrete pours height 6.1m；
7th step removes first of steel construction and completes structure construction：It removes first of bracing members, handles basal plane, set up the
Six step support systems bind side wall reinforcing bar, and formwork casting concrete pours height 4.05m, completes construction.
Further, the first segment which pours is bottom plate and leads wall and pour, construction joint
Reserved location 45cm above bottom plate, it is 1.25m, construction period 5d to pour height.
Further, the second segment which pours is south and north flanks ring beam and sleeper, thing
Side wall pours, and for construction joint reserved location below the 5th bracing members at 1.35m, it is 1.2m to pour height, and construction period is
7d。
Further, the third section which pours is that south and north flanks sleeper and southern side portal are horizontal
Beam, thing side wall pour, and for construction joint reserved location below the 4th bracing members at 1.76m, it is 3.59m to pour height, is applied
The work period is 7d.
Further, pour the 4th section of the launching shaft foundation pit vertical section has poured for south and north flanks ring beam and HL3
At, construction joint reserved location below the third road bracing members at 0.9m, it is 5.76m, construction period 7d to pour height.
Further, pour the 5th section of the launching shaft foundation pit vertical section pours for side wall, construction joint reserved place
It sets below the second bracing members at 1.4m, it is 6.1m, construction period 7d to pour height.
Further, pour the 6th section of the launching shaft foundation pit vertical section pours for side wall, construction joint reserved place
It sets below first of bracing members at 3.3m, it is 6.1m, construction period 7d to pour height.
Further, pour the 7th section of the launching shaft foundation pit vertical section pours for remaining wall, pours height
For 4.05m, construction period 6d.
In conclusion the present invention has the advantages that compared with prior art：
The present invention is poured in launching shaft foundation pit using vertical section, ensure that the construction of shield launching well construction is smooth
It carries out, top bracing members can be removed reaching 85% or more for lower part concrete strength, in conjunction with the position of bracing members, and south,
The construction of this foundation pit structure is divided into vertical 7 times and constructed by northern both sides hole ring beam position and lapped length of steel bar requirement,
Be gradually completing to bottom plate, side wall pour and five bracing members are removed, and complete structure construction.
More clearly to illustrate the structure feature and effect of the present invention, come below in conjunction with the accompanying drawings to this hair with specific embodiment
It is bright to be described in detail.
Description of the drawings
Fig. 1 is the structural schematic diagram that bottom plate of the present invention pours.
Fig. 2 is the structural schematic diagram that side wall pours in the present invention.
Fig. 3 is the structural schematic diagram that the 5th bracing members are removed in the present invention and side wall pours.
Fig. 4 is the structural schematic diagram that the 4th bracing members are removed in the present invention and side wall pours.
Fig. 5 is the structural schematic diagram that third road bracing members are removed in the present invention and side wall pours.
Fig. 6 is the structural schematic diagram that second bracing members are removed in the present invention and side wall pours.
Fig. 7 is the structural schematic diagram removed first of steel construction in the present invention and complete structure construction.
Specific implementation mode
The following further describes the technical solution of the present invention in the following with reference to the drawings and specific embodiments.
A kind of construction method that launching shaft foundation pit vertical section pours should be in launching shaft according to design principle
Foundation pit reaches 85% or more for lower part concrete strength can remove top bracing members, in conjunction with the position of bracing members, He Nan, north two
The construction of this foundation pit structure is divided into vertical 7 times and constructed, specifically by side hole ring beam position and lapped length of steel bar requirement
Construction procedure is as follows：
The first step, bottom slab concreting：It is that shield well southern side portal HL2 top marks are high to pour height, and setting-up of construction joint position is bottom
Plate top 1.25m；As shown in Figure 1.
Second step, side wall pour：After the completion of bottom slab concreting, first step support system is set up, binds side wall reinforcing bar, formwork pours
Concrete is built, height 1.2m is poured；As shown in Figure 2.
Third walks, and the 5th bracing members are removed and side wall pours：The 5th bracing members are removed, basal plane is handled, sets up second
Support system is walked, side wall is bound and north and south side ring beam steel, formwork casting concrete pours height 3.59m；As shown in Figure 3.
4th step, the 4th bracing members are removed and side wall pours：The 4th bracing members are removed, basal plane is handled, sets up third
Support system is walked, side wall is bound and north and south side ring camber portion reinforcing bar, formwork casting concrete pours height 5.76m；Such as Fig. 4 institutes
Show.
5th step, third road bracing members are removed and side wall pours：Third road bracing members are removed, basal plane is handled, sets up the 4th
Support system is walked, side wall reinforcing bar is bound, formwork casting concrete pours height 6.1m；As shown in Figure 5.
6th step, second bracing members are removed and side wall pours：Second bracing members are removed, basal plane is handled, sets up the 5th
Support system is walked, side wall reinforcing bar is bound, formwork casting concrete pours height 6.1m；As shown in Figure 6.
7th step removes first of steel construction and completes structure construction：It removes first of bracing members, handles basal plane, set up the
Six step support systems bind side wall reinforcing bar, and formwork casting concrete pours height 4.05m, completes construction；As shown in Figure 7.
In conclusion the construction way figure that the launching shaft foundation pit vertical section of the present invention pours is as shown in the table：
The technical principle that the present invention is described above in association with specific embodiment, is only the preferred embodiment of the present invention.This
The protection domain of invention is not limited merely to above-described embodiment, and all technical solutions belonged under thinking of the present invention belong to the present invention
Protection domain.Those skilled in the art would not require any inventive effort the other specific realities that can associate the present invention
Mode is applied, these modes are fallen within protection scope of the present invention.
Claims (8)
1. a kind of construction method that launching shaft foundation pit vertical section pours, which is characterized in that the construction of this foundation pit structure is divided into
It constructs for vertical 7 times, steps are as follows for Specific construction：
The first step, bottom slab concreting：It is that shield well southern side portal HL2 top marks are high to pour height, and setting-up of construction joint position is on bottom plate
Portion 1.25m；
Second step, side wall pour：After the completion of bottom slab concreting, first step support system is set up, binds side wall reinforcing bar, formwork pours mixed
Solidifying soil, pours height 1.2m；
Third walks, and the 5th bracing members are removed and side wall pours：The 5th bracing members are removed, basal plane is handled, sets up second step branch
Support body system, binds side wall and north and south side ring beam steel, formwork casting concrete pour height 3.59m；
4th step, the 4th bracing members are removed and side wall pours：The 4th bracing members are removed, basal plane is handled, set up third step branch
Support body system, binds side wall and north and south side ring camber portion reinforcing bar, formwork casting concrete pour height 5.76m；
5th step, third road bracing members are removed and side wall pours：Third road bracing members are removed, basal plane is handled, sets up the 4th step branch
Support body system, binds side wall reinforcing bar, and formwork casting concrete pours height 6.1m；
6th step, second bracing members are removed and side wall pours：Second bracing members are removed, basal plane is handled, sets up the 5th step branch
Support body system, binds side wall reinforcing bar, and formwork casting concrete pours height 6.1m；
7th step removes first of steel construction and completes structure construction：First of bracing members is removed, basal plane is handled, sets up the 6th step
Support system binds side wall reinforcing bar, and formwork casting concrete pours height 4.05m, completes construction.
2. the construction method that a kind of launching shaft foundation pit vertical section according to claim 1 pours, which is characterized in that
The first segment that the launching shaft foundation pit vertical section pours is bottom plate and leads wall and pour, and construction joint reserved location is on bottom plate
Square 45cm, it is 1.25m, construction period 5d to pour height.
3. the construction method that a kind of launching shaft foundation pit vertical section according to claim 1 pours, which is characterized in that
The second segment that the launching shaft foundation pit vertical section pours is that south and north flanks ring beam and sleeper, thing side wall pour, and is constructed
Reserved location places 1.35m below the 5th bracing members are stitched, pour height as 1.2m, construction period 7d.
4. the construction method that a kind of launching shaft foundation pit vertical section according to claim 1 pours, which is characterized in that
The third section that the launching shaft foundation pit vertical section pours is that south and north flanks sleeper and southern side portal crossbeam, thing side wall pour
It builds, for construction joint reserved location below the 4th bracing members at 1.76m, it is 3.59m, construction period 7d to pour height.
5. the construction method that a kind of launching shaft foundation pit vertical section according to claim 1 pours, which is characterized in that
Pour the 4th section of the launching shaft foundation pit vertical section pours completions for south and north flanks ring beam and HL3, and construction joint is reserved
Below the third road bracing members at 0.9m, it is 5.76m, construction period 7d to pour height for position.
6. the construction method that a kind of launching shaft foundation pit vertical section according to claim 1 pours, which is characterized in that
Pour the 5th section of the launching shaft foundation pit vertical section pours for side wall, and construction joint reserved location is in second bracing members
At the 1.4m of lower section, it is 6.1m, construction period 7d to pour height.
7. the construction method that a kind of launching shaft foundation pit vertical section according to claim 1 pours, which is characterized in that
Pour the 6th section of the launching shaft foundation pit vertical section pours for side wall, and construction joint reserved location is in first of bracing members
At the 3.3m of lower section, it is 6.1m, construction period 7d to pour height.
8. the construction method that a kind of launching shaft foundation pit vertical section according to claim 1 pours, which is characterized in that
Pour the 7th section of the launching shaft foundation pit vertical section pours for remaining wall, and it is 4.05m, construction period to pour height
For 6d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420487.7A CN108590680A (en) | 2018-05-04 | 2018-05-04 | A kind of construction method that launching shaft foundation pit vertical section pours |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420487.7A CN108590680A (en) | 2018-05-04 | 2018-05-04 | A kind of construction method that launching shaft foundation pit vertical section pours |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108590680A true CN108590680A (en) | 2018-09-28 |
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| CN201810420487.7A Pending CN108590680A (en) | 2018-05-04 | 2018-05-04 | A kind of construction method that launching shaft foundation pit vertical section pours |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162741A (en) * | 2018-10-29 | 2019-01-08 | 中铁十二局集团有限公司 | The method in shield crossing piston air duct and piston air duct superstructure synchronous construction |
| CN109403981A (en) * | 2018-12-07 | 2019-03-01 | 石家庄铁源工程咨询有限公司 | The construction technology of subway shield shaft main structure |
| CN110159309A (en) * | 2019-05-27 | 2019-08-23 | 中国水利水电第八工程局有限公司 | A kind of construction method using foam concrete backfill Tunneling by mining method |
| CN110820756A (en) * | 2019-11-05 | 2020-02-21 | 中铁二十二局集团轨道工程有限公司 | Shield well and vertical shaft deep foundation pit excavation safety construction method |
| CN110820752A (en) * | 2019-11-05 | 2020-02-21 | 中铁二十二局集团轨道工程有限公司 | Bottom plate steel bar system and shield well foundation pit main structure construction method comprising same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162741A (en) * | 2018-10-29 | 2019-01-08 | 中铁十二局集团有限公司 | The method in shield crossing piston air duct and piston air duct superstructure synchronous construction |
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| CN110159309A (en) * | 2019-05-27 | 2019-08-23 | 中国水利水电第八工程局有限公司 | A kind of construction method using foam concrete backfill Tunneling by mining method |
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| CN110820756A (en) * | 2019-11-05 | 2020-02-21 | 中铁二十二局集团轨道工程有限公司 | Shield well and vertical shaft deep foundation pit excavation safety construction method |
| CN110820752A (en) * | 2019-11-05 | 2020-02-21 | 中铁二十二局集团轨道工程有限公司 | Bottom plate steel bar system and shield well foundation pit main structure construction method comprising same |
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Application publication date: 20180928 |
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