CN109972666A - Excavation of subway foundation pit controls the existing construction method for closing on pipeline disturbance - Google Patents
Excavation of subway foundation pit controls the existing construction method for closing on pipeline disturbance Download PDFInfo
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- CN109972666A CN109972666A CN201910318383.XA CN201910318383A CN109972666A CN 109972666 A CN109972666 A CN 109972666A CN 201910318383 A CN201910318383 A CN 201910318383A CN 109972666 A CN109972666 A CN 109972666A
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- 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
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- 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
- E02D15/06—Placing concrete under water
-
- 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
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the water
-
- 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
- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/06—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging elements mounted on an endless chain
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
Excavation of subway foundation pit controls the existing construction method for closing on pipeline disturbance, it is related to technical field of building construction.The present invention solves the method that existing excavation of subway foundation pit control closes on pipeline disturbance and there is the construction not being able to satisfy apart from the closer pipeline of foundation pit, foundation pit side aviation fuel pipeline has seriously affected the excavation construction of the Metro station excavation soil body, the problem of increasing the difficulty of subway construction, and easily leading to pipeline deformation.A kind of excavation of subway foundation pit of the invention control it is existing close on pipeline disturbance construction method through the following steps that realize, Step 1: determine reinforcing area；Step 2: the soil body in reinforcing area squeezes into downwards the different steel floral tube of three row's length from earth's surface；Step 3: first carrying out slip casting to short steel floral tube, slip casting then is carried out to long steel floral tube again；Step 4: being laid with steel plate in reinforcing area earth's surface；Step 5: construction TRD water-stop curtain；Step 6: construction drill bored concrete pile.The present invention is for realizing the control for closing on pipeline disturbance to foundation pit.
Description
Technical field
The present invention relates to technical field of building construction, control the existing pipeline that closes on more particularly to a kind of excavation of subway foundation pit and disturb
Dynamic construction method.
Background technique
With the propulsion of urbanization, the density of population in city, inlet flow rate constantly increase, for the hair for pushing urban transportation
Exhibition, urban underground space obtain swift and violent exploitation, and many cities in China have started construction and built with operation a plurality of tracks, but due to
In down town, building, underground utilities are numerous for subway construction, increase the difficulty of subway construction, reduce subway foundation pit and open
Dig the main problem to be solved become during subway construction to the influence of periphery pipeline.The control that traditional construction disturbs pipeline
Mainly by adjusting each construction parameter, being adjusted to wall mode, accelerate speed of application etc., and by reinforcing pipeline and the periphery soil body
It monitors, the reinforcement protection that takes reasonable measure in time of finding the problem.But conventional control mode is not able to satisfy and compares apart from foundation pit
Close pipeline, therefore seek the control that closes on pipeline disturbance of the new method realization of one kind to foundation pit.
It is not able to satisfy in conclusion the method that existing excavation of subway foundation pit control closes on pipeline disturbance exists apart from foundation pit
The excavation construction that pipeline has seriously affected the Metro station excavation soil body is closed in the construction of closer pipeline, foundation pit side, increases
The difficulty of subway construction, and the problem of easily lead to pipeline deformation.
Summary of the invention
The method that the present invention closes on pipeline disturbance in order to solve the control of existing excavation of subway foundation pit exist be not able to satisfy away from
The construction of the pipeline closer from foundation pit, foundation pit side, which closes on pipeline and seriously affected the excavation of the Metro station excavation soil body, applies
Work, increases the difficulty of subway construction, and the problem of easily lead to pipeline deformation, and then provides a kind of control of excavation of subway foundation pit both
There is the construction method for closing on pipeline disturbance.
The technical scheme is that
Excavation of subway foundation pit controls the existing construction method for closing on pipeline disturbance, and the method is through the following steps that realize
,
Step 1: determining reinforcing area:
The pipeline side soil body that closes on of foundation pit is determined to soil mass consolidation boundary of works area；
Step 2: pilot hole, installation steel floral tube:
The different steel floral tube of three row's length is squeezed into downwards from earth's surface in the soil body of fixed reinforcing area, is first constructed close
The short steel floral tube of two rows for closing on pipeline, then constructs again close to the long steel floral tube of one row of foundation pit；
Step 3: downward grouting is reinforced:
Slip casting is carried out to steel floral tube, slip casting first is carried out to short steel floral tube, slip casting then is carried out to long steel floral tube again；
Step 4: being laid with steel plate:
It is laid with steel plate in reinforcing area earth's surface, steel plate is laid with no less than 1 layer, and the steel plate is machine-walking region；
Step 5: construction TRD water-stop curtain:
It first constructs close to the TRD water-stop curtain for closing on pipeline side, then constructs again far from the TRD sealing curtain for closing on pipeline
Curtain；
Step 6: cast-in-situ bored pile:
The construction drill bored concrete pile between foundation pit and TRD water-stop curtain, the bored concrete pile is as foundation pit supporting construction one
Point.
Further, in the step 1, soil stabilization range are as follows: close on pipeline to the distance of foundation pit in 1 times of foundation pit depth
Spend the soil body within range.
Further, in the step 2, steel floral tube, which is squeezed into, will close on pipeline to foundation pit edge apart from equal part, the short spray of molten steel
Length of tube is 1.5 times for closing on line depth, and long spray of molten steel length of tube is 1.3 times of foundation depth, and spray of molten steel pipe diameter is 108mm.
Further, in the step 3, injecting paste material is C30 striaght cement slurries, and grouting pressure is 0.3~0.6MPa,
Grouting amount is 100L/m.
Further, in the step 4, steel plate thickness 2cm.
Further, in the step 5, TRD water-stop curtain thickness of wall body is 600mm, using P.O42.5 grades of ordinary silicons
Acid salt cement, Cement for walls volume 22%, ratio of mud 1:1 use sodium bentonite mixing at tank liquor.
Further, in the step 6, pile diameter 1000mm, stake spacing is 1200mm, and 15cm is used between stake
Thick C20 in-network processing.
Further, the TRD water-stop curtain construction includes the following steps: to excavate leading for 0.7m wide along TRD center line of wall
Slot；Hang the provided box of storage chain cutter；It is in place that host is carried out according to the positioning of wall center line；Chain is lifted from provided box
Shape cutter is attached with host；Cutting, the solidify liquid injection, cement of the wall soil body are carried out after chain Cutting tool installation manner to designed elevation
Soil is at wall.
Further, the bored pile construction includes the following steps: in the cast-in-situ bored pile provided according to design
Heart point carries out the setting-out of stake position；Manually embedded casing is carried out according to the stake position center of setting-out；According to embedded casing and stake position cross hairs
It is in place to carry out drilling machine；The system of slurry coat method is mixed；Drilling machine drilling construction；Fabrication of reinforcing cage, lifting and installation；Conduit installation；Conduit
Borehole cleaning is carried out after being installed ensures that sediment meets design requirement；Underwater gliders.
Further, in the step 4, when the steel plate number of plies that reinforcing area earth's surface is laid with is equal to 1, the steel plate exists
Middle line on length direction is vertically arranged with pipeline is closed on；
When reinforcing area earth's surface be laid with the steel plate number of plies be greater than 1 when, the middle line of first layer steel plate in the longitudinal direction with face
Nearly pipeline is vertically arranged, the middle line of second layer steel plate in the longitudinal direction and the median perpendicular of first layer steel plate in the longitudinal direction
Setting ... ..., the median perpendicular setting of the middle line and (n-1)th layer of steel plate of n-th layer steel plate in the longitudinal direction in the longitudinal direction.
The present invention has the effect that compared with prior art
1, the optimization of the invention by closing on pipeline perturbation motion method to Traditional control, using steel floral tube to aviation fuel pipe periphery soil
Body carries out pre-reinforcement, heavy-duty machinery operating area takes steel plate to be laid with to reduce and go along with sb. to guard him knot to ground load, first construction foundation pit
Branch mark structure minimizes the disturbance of bored pile construction, cast-in-situ bored pile has been formed for the TRD water-stop curtain formation of structure
At working procedures arrangement and the technical measures such as foundation pit enclosure structure, can be with effective solution Metro station excavation soil excavation pair
The influence of pipeline is closed in side, reduces the deformation of pipeline, and when reinforcing area earth's surface is laid with steel plate, steel plate is laid with no less than 1 layer,
It is laid with respectively parallel and perpendicular to pipeline direction, prevents the region from receiving mechanical load parameter differential settlement；Stop in construction TRD
When water curtain, the water-stop curtain for closing on pipeline is first beaten, and is moved back the direction far from pipeline and is constructed, to reduce the extruding to pipeline.
Detailed description of the invention
Fig. 1 is the schematic diagram that reinforcing area is determined described in step 1 of the present invention；
Fig. 2 is enlarged drawing of the Fig. 1 at M；
Fig. 3 is the schematic diagram that steel floral tube is installed described in step 2 of the present invention；
Fig. 4 is enlarged drawing of the Fig. 3 at N；
Fig. 5 is the schematic diagram that downward grouting described in step 3 of the present invention is reinforced；
Fig. 6 is enlarged drawing of the Fig. 5 at O；
Fig. 7 is the schematic diagram that steel plate is laid with described in step 4 of the present invention；
Fig. 8 is enlarged drawing of the Fig. 7 at P；
Fig. 9 is construction direction schematic diagram when reinforcing area of the invention reaches some strength；
Figure 10 is enlarged drawing of the Fig. 9 at Q.
Specific embodiment
Specific embodiment 1: illustrating present embodiment, the excavation of subway foundation pit control of present embodiment in conjunction with Fig. 1 to Figure 10
Make it is existing close on pipeline disturbance construction method, the method through the following steps that realize,
Step 1: determining reinforcing area 3:
The 2 side soil body of pipeline that closes on of foundation pit 1 is determined to soil mass consolidation boundary of works area；
Step 2: pilot hole, installation steel floral tube 4:
The different steel floral tube 4 of three row's length is squeezed into downwards from earth's surface in the soil body of fixed reinforcing area 3, and first construction is leaned on
The short steel floral tube 4-1 of two rows for closely closing on pipeline 2, then constructs again close to the long steel floral tube 4-2 of 1 one row of foundation pit；
Step 3: downward grouting is reinforced:
Slip casting is carried out to steel floral tube 4, slip casting first is carried out to short steel floral tube 4-1, then long steel floral tube 4-2 is infused again
Slurry；
Step 4: being laid with steel plate:
It is laid with steel plate in 3 earth's surface of reinforcing area, steel plate is laid with no less than 1 layer, and the steel plate is machine-walking region 5, is prevented
Only the region is by mechanical load parameter differential settlement；
Step 5: construction TRD water-stop curtain 6:
It first constructs close to the TRD water-stop curtain 6 for closing on 2 side of pipeline, then constructs and stop far from the TRD for closing on pipeline 2 again
Water curtain 6；
Step 6: cast-in-situ bored pile 7:
The construction drill bored concrete pile 7 between foundation pit 1 and TRD water-stop curtain 6, the bored concrete pile 7 are used as 1 supporting construction of foundation pit
A part.
Specific embodiment 2: illustrate present embodiment in conjunction with Fig. 1 and Fig. 2, and in the step 1 of present embodiment, soil
Body reinforcing scope are as follows: close on pipeline 2 and arrive the soil body of the distance of foundation pit 1 within 1 times of foundation depth range.So set, according to
Aviation fuel pipe is analyzed apart from the foundation pit degree of approach, the feature bigger apart from the nearlyr construction disturbance of foundation pit, on the influence aviation fuel before construction
The soil body in area under control domain constructed before reinforcing, reduce the sedimentation of aviation fuel pipe and the aviation fuel pipe periphery soil body with maximum limit.
Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: illustrate present embodiment in conjunction with Fig. 3 and Fig. 4, and in the step 2 of present embodiment, steel
Floral tube 4, which is squeezed into, will close on pipeline 2 to 1 edge of foundation pit apart from equal part, and short steel floral tube 4-1 length is close on 2 depth of pipeline 1.5
Times, long steel floral tube 4-2 length is 1.3 times of foundation depth, and 4 diameter of steel floral tube is 108mm.Close to two rows of steel floral tubes of aviation fuel pipe
Be it is shorter, be about 8.5m；A row close to 1 side of foundation pit is longer, length about 18.8m.So set, surveying soil close to foundation pit
Body forms the whole soil body after reinforcing have certain bracing effect, reinforces purpose close to the soil at both sides of pipeline and mainly solves aviation fuel
Pipeline is in the characteristics of unstable silt soil strata.Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: illustrate present embodiment in conjunction with Fig. 5 and Fig. 6, and in the step 3 of present embodiment, note
Slurry takes the mode of downstriker delamination pour slurry, and slip casting depth is tube bottom to aviation fuel pipe or less 0.5m, and injecting paste material is C30 striaght cement
Slurries, grouting pressure are 0.3~0.6MPa, grouting amount 100L/m.So set, the mode of downward grouting is taken to contain in thickness
Pre grouting from the surface is used in water layer, can be preferably layered, is segmented progress soil stabilization, grouting pressure control is no more than 0.6Mpa,
To maximally reduce the disturbance of the mortar depositing construction team soil body.Other compositions and connection relationship and specific embodiment one, two or
Three is identical.
Specific embodiment 5: in the step 4 of present embodiment, steel plate thickness 2cm.It can according to monitoring situation
Increase and is laid with the steel plate number of plies.So set, steel plate is laid in construction ground, with the maximum heavy duty equipment that reduces to the lotus on ground
It carries, reduces sedimentation, it is ensured that the sedimentation of aviation fuel pipeline reaches minimum.Other compositions and connection relationship and specific embodiment one, two,
Three or four is identical.
Specific embodiment 6: illustrate present embodiment in conjunction with Fig. 7 and Fig. 8, in the step 5 of present embodiment,
6 thickness of wall body of TRD water-stop curtain is 600mm, using P.O42.5 grades of ordinary portland cements, Cement for walls volume 22%, water ash
Than using sodium bentonite mixing at tank liquor for 1:1.So set, cutting soil improves its workability using sodium bentonite
The slot that collapses can be prevented, the volume that curing agent (cement) in solidify liquid is improved during slip casting forms intensity height, the impermeability of wall
By force, guarantee that construction disturbance is small, the construction disturbance for the reduction cast-in-situ bored pile 7 that the bracing effect of TRD wall itself can be bigger, from
And reduce the deformation of the aviation fuel pipe periphery soil body and aviation fuel pipe.Other compositions and connection relationship and specific embodiment one, two, three,
Four or five is identical.
Specific embodiment 7: illustrate present embodiment in conjunction with Fig. 9 and Figure 10, in the step 6 of present embodiment,
7 diameter of bored concrete pile is 1000mm, and stake spacing is 1200mm, and the C20 in-network processing of 15cm thickness is used between stake.So set, stake
Between net spray apply spray in time and can reduce to the greatest extent the loss of inter-pile soil body, to reduce the deformation of foundation pit enclosure structure itself,
Controlling foundation pit deformation is also to guarantee one of indeformable most important measure of aviation fuel pipe.It is other composition and connection relationship with specifically
Embodiment one, two, three, four, five or six are identical.
Specific embodiment 8: the TRD water-stop curtain 6 construction of present embodiment includes the following steps: along TRD wall
The guide groove of heart line excavation 0.7m wide；Hang the provided box of storage chain cutter；Host is carried out just according to the positioning of wall center line
Position；Chain cutter is lifted from provided box to be attached with host；The wall soil body is carried out after chain Cutting tool installation manner to designed elevation
Cutting, solidify liquid injection, soil cement are at wall.Other compositions and connection relationship and specific embodiment one, two, three, four, five, six
Or seven is identical.
Specific embodiment 9: the construction of the cast-in-situ bored pile 7 of present embodiment includes the following steps: to be mentioned according to design
The central point of the cast-in-situ bored pile 7 of confession carries out the setting-out of stake position；Manually embedded casing is carried out according to the stake position center of setting-out；According to burying
If it is in place that casing and stake position cross hairs carry out drilling machine；The system of slurry coat method is mixed；Drilling machine drilling construction；Fabrication of reinforcing cage, lifting and
Installation；Conduit installation；Conduit, which carries out borehole cleaning after being installed, ensures that sediment meets design requirement；Underwater gliders.It is other
Composition and connection relationship and specific embodiment one, two, three, four, five, six, seven or eight are identical.
Specific embodiment 10: in the step 4, it is described when the steel plate number of plies that 3 earth's surface of reinforcing area is laid with is equal to 1
The middle line of steel plate in the longitudinal direction is vertically arranged with pipeline 2 is closed on；
When 3 earth's surface of reinforcing area be laid with the steel plate number of plies be greater than 1 when, the middle line of first layer steel plate in the longitudinal direction with face
Nearly pipeline 2 is vertically arranged, and the middle line of second layer steel plate in the longitudinal direction and the middle line of first layer steel plate in the longitudinal direction hang down
Straight setting ... ..., the middle line of n-th layer steel plate in the longitudinal direction is set with the median perpendicular of (n-1)th layer of steel plate in the longitudinal direction
It sets.
Claims (10)
1. excavation of subway foundation pit control it is existing close on pipeline disturbance construction method, it is characterised in that: the method be by with
What lower step was realized,
Step 1: determining reinforcing area (3):
Pipeline (2) the side soil body that closes on of foundation pit (1) is determined to soil mass consolidation boundary of works area；
Step 2: pilot hole, installation steel floral tube (4):
The different steel floral tube (4) of three row's length is squeezed into downwards from earth's surface in the soil body of fixed reinforcing area (3), and first construction is leaned on
The short steel floral tube (4-1) of two rows for closely closing on pipeline (2), then constructs again close to the long steel floral tube (4-2) of (1) one row of foundation pit；
Step 3: downward grouting is reinforced:
Slip casting is carried out to steel floral tube (4), slip casting first is carried out to short steel floral tube (4-1), then long steel floral tube (4-2) is infused again
Slurry；
Step 4: being laid with steel plate:
It is laid with steel plate in reinforcing area (3) earth's surface, steel plate is laid with no less than 1 layer, and the steel plate is machine-walking region (5)；
Step 5: construction TRD water-stop curtain (6):
It first constructs close to the TRD water-stop curtain (6) for closing on pipeline (2) side, then constructs again far from the TRD for closing on pipeline (2)
Water-stop curtain (6)；
Step 6: cast-in-situ bored pile (7):
The construction drill bored concrete pile (7) between foundation pit (1) and TRD water-stop curtain (6), the bored concrete pile (7) are propped up as foundation pit (1)
Protection structure a part.
2. excavation of subway foundation pit according to claim 1 controls the existing construction method for closing on pipeline disturbance, feature exists
In: in the step 1, soil stabilization range are as follows: close on the distance of pipeline (2) to foundation pit (1) in (1) times foundation depth range
Within the soil body.
3. excavation of subway foundation pit according to claim 2 controls the existing construction method for closing on pipeline disturbance, feature exists
In: in the step 2, steel floral tube (4), which is squeezed into, will close on pipeline (2) to foundation pit (1) edge apart from equal part, short steel floral tube (4-
1) length is 1.5 times for closing on line depth, and long steel floral tube (4-2) length is 1.3 times of foundation depth, steel floral tube (4) diameter
For 108mm.
4. excavation of subway foundation pit according to claim 3 controls the existing construction method for closing on pipeline disturbance, feature exists
In: in the step 3, injecting paste material is C30 striaght cement slurries, and grouting pressure is 0.3~0.6MPa, grouting amount 100L/m.
5. excavation of subway foundation pit according to claim 4 controls the existing construction method for closing on pipeline disturbance, feature exists
In: in the step 4, steel plate thickness 2cm.
6. excavation of subway foundation pit according to claim 5 controls the existing construction method for closing on pipeline disturbance, feature exists
In: in the step 5, TRD water-stop curtain (6) thickness of wall body is 600mm, using P.O42.5 grades of ordinary portland cements, wall
Body cement mixing content 22%, ratio of mud 1:1 use sodium bentonite mixing at tank liquor.
7. excavation of subway foundation pit according to claim 6 controls the existing construction method for closing on pipeline disturbance, feature exists
In: in the step 6, bored concrete pile (7) diameter is 1000mm, and stake spacing is 1200mm, nets spray using the C20 of 15cm thickness between stake
Concrete.
8. excavation of subway foundation pit according to claim 1 or 6 controls the existing construction method for closing on pipeline disturbance, feature
Be: TRD water-stop curtain (6) construction includes the following steps: the guide groove that 0.7m wide is excavated along TRD center line of wall；It hangs and deposits
Put the provided box of chain cutter；It is in place that host is carried out according to the positioning of wall center line；From provided box lift chain cutter with
Host is attached；The cutting, solidify liquid injection, soil cement of the wall soil body are carried out after chain Cutting tool installation manner to designed elevation into wall.
9. excavation of subway foundation pit according to claim 1 or claim 7 controls the existing construction method for closing on pipeline disturbance, feature
Be: cast-in-situ bored pile (7) construction includes the following steps: that the center of the cast-in-situ bored pile (7) provided according to design clicks through
Row stake position setting-out；Manually embedded casing is carried out according to the stake position center of setting-out；It is bored according to embedded casing and stake position cross hairs
Machine is in place；The system of slurry coat method is mixed；Drilling machine drilling construction；Fabrication of reinforcing cage, lifting and installation；Conduit installation；Conduit installs
Ensure that sediment meets design requirement at rear progress borehole cleaning；Underwater gliders.
10. excavation of subway foundation pit controls the existing construction method for closing on pipeline disturbance according to claim 1 or 5, special
Sign is: in the step 4, when the steel plate number of plies that reinforcing area (3) earth's surface is laid with is equal to 1, the steel plate is in length direction
On middle line be vertically arranged with pipeline (2) is closed on；
When reinforcing area (3) earth's surface be laid with the steel plate number of plies be greater than 1 when, the middle line of first layer steel plate in the longitudinal direction with close on
Pipeline (2) is vertically arranged, and the middle line of second layer steel plate in the longitudinal direction and the middle line of first layer steel plate in the longitudinal direction hang down
Straight setting ... ..., the middle line of n-th layer steel plate in the longitudinal direction is set with the median perpendicular of (n-1)th layer of steel plate in the longitudinal direction
It sets.
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| CN201910318383.XA CN109972666B (en) | 2019-04-19 | 2019-04-19 | Construction method for controlling disturbance of existing adjacent pipeline in excavation of subway foundation pit |
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|---|---|---|---|
| CN201910318383.XA CN109972666B (en) | 2019-04-19 | 2019-04-19 | Construction method for controlling disturbance of existing adjacent pipeline in excavation of subway foundation pit |
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| CN109972666B CN109972666B (en) | 2020-12-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453687A (en) * | 2019-07-31 | 2019-11-15 | 南京林业大学 | A kind of Metro station excavation excavates the protection structure and construction method of pipeline |
| CN116427417A (en) * | 2023-03-15 | 2023-07-14 | 广州万构建筑工程设计有限公司 | Construction method and system for controlling disturbance of existing adjacent pipelines in foundation pit excavation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002004286A (en) * | 2000-06-23 | 2002-01-09 | Japan Steel & Tube Constr Co Ltd | Construction method for forming drainage basin and earth retaining box used therefor |
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| CN106065628A (en) * | 2016-01-26 | 2016-11-02 | 中铁三局集团有限公司 | Based on the major diameter running water pipe security protection construction method forever facing the theory of combination |
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| JP2002004286A (en) * | 2000-06-23 | 2002-01-09 | Japan Steel & Tube Constr Co Ltd | Construction method for forming drainage basin and earth retaining box used therefor |
| CN204326080U (en) * | 2014-11-18 | 2015-05-13 | 中大建设有限公司 | A kind of next-door neighbour's existing building pit maintenance soil structure |
| CN106065628A (en) * | 2016-01-26 | 2016-11-02 | 中铁三局集团有限公司 | Based on the major diameter running water pipe security protection construction method forever facing the theory of combination |
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| CN110453687A (en) * | 2019-07-31 | 2019-11-15 | 南京林业大学 | A kind of Metro station excavation excavates the protection structure and construction method of pipeline |
| CN110453687B (en) * | 2019-07-31 | 2024-03-19 | 南京林业大学 | Protection structure of subway station foundation pit excavation pipeline and construction method |
| CN116427417A (en) * | 2023-03-15 | 2023-07-14 | 广州万构建筑工程设计有限公司 | Construction method and system for controlling disturbance of existing adjacent pipelines in foundation pit excavation |
| CN116427417B (en) * | 2023-03-15 | 2024-04-26 | 浙江聚贤建设股份有限公司 | Construction method and system for controlling disturbance of existing adjacent pipelines in foundation pit excavation |
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| CN109972666B (en) | 2020-12-11 |
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