CN110306531A - High water level erratic boulder stratum construction of diaphragm wall technique - Google Patents
High water level erratic boulder stratum construction of diaphragm wall technique Download PDFInfo
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- CN110306531A CN110306531A CN201910606990.6A CN201910606990A CN110306531A CN 110306531 A CN110306531 A CN 110306531A CN 201910606990 A CN201910606990 A CN 201910606990A CN 110306531 A CN110306531 A CN 110306531A
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- high water
- erratic boulder
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention relates to a kind of high water level erratic boulder stratum construction of diaphragm wall techniques, belong to subway construction technical field of construction, the main points of its technical scheme are that including: step S1, by cutting box drilling to completion；Step S2, TRD engineering method builds Soil-cement Wall；It is initially injected and excavates liquid and excavates in advance, loosen soil layer a distance, then withdraw and excavate to original place, reinject solidify liquid and push ahead and stir into wall；Step S3, cutting box, which is extracted, to be decomposed；Traditional colonnade formula Soil-cement diaphragm wall is solved in high water level erratic boulder earth formation, the problem ineffective with earth-retaining is held in the main structure progress supporting that good cannot be excavated to subway, antiseepage；Antiseepage retaining support well can be carried out to subway constructing structure main body.
Description
Technical field
The present invention relates to subway construction technical field of construction, more particularly, to a kind of high water level erratic boulder stratum construction of diaphragm wall
Technique.
Background technique
When iron-based station is built over the ground, need to build diaphram wall in the underground structure of excavation.Underground is continuous
Wall is that foundation engineering uses a kind of trench machine on the ground, along the periphery axis of deep excavation project, in mud off condition
Under, it excavates out a long and narrow deep trouth, after clear slot, steel reinforcement cage is hung in slot, is then built with tremie method underwater concreting with tremie method
At a unit groove section, so carry out paragraph by paragraph, build up continuous armored concrete wall together in underground, as intercept water, antiseepage,
Load-bearing, water-retaining structure.On the ground, it using some extraordinary trench machines, is acted on, is dug out in underground narrow by means of the retaining wall of mud
And deep foundation trench, and one for being poured material appropriate in it and being formed has the continuous of antiseepage, earth-retaining and weight-bearing function
Underground wall body.
Existing erratic boulder bottom construction of diaphragm wall technique can refer to the Chinese invention that application publication number is CN108951609A
Patent application document, it discloses one kind suitable for soft or hard uneven ovum gravel erratic boulder stratum construction method of underground continuous wall, including compared with
Soft ovum gravel erratic boulder stratum grooving, be drilled with perpendicular drilling, native grooving is grabbed on harder ovum gravel erratic boulder stratum and construction of diaphragm wall four steps
Suddenly, after the softer ovum gravel erratic boulder stratum being hollowed out, grooving operation directly is carried out using chute forming machine, it is more applying brill at groove location
A to extend perpendicular drilling, the entire depth of perpendicular drilling diaphram wall foundation trench along harder ovum gravel erratic boulder stratum extends.
Existing construction of diaphragm wall technique is primarily directed to common earth formation, when subway is being built in coastal cities
When, coastal stratum is mostly high water level erratic boulder earth formation.Construction of diaphragm wall traditional at present mostly uses uniaxial or multiaxis spiral shell
Drilling machine is revolved, the colonnade formula Soil-cement diaphragm wall for formation of constructing, this colonnade formula Soil-cement diaphragm wall is in high water level
In erratic boulder earth formation, the main structure progress supporting that good cannot be excavated to subway, antiseepage is held ineffective with earth-retaining.
Summary of the invention
The purpose of the present invention is to provide a kind of high water level erratic boulder head stratum construction of diaphragm wall techniques, can be well to subway
Constructing structure main body carries out antiseepage retaining support.
Foregoing invention purpose of the invention has the technical scheme that a kind of high water level erratic boulder stratum connects
Continuous wall construction technology, comprises the following methods:
Step S1, by cutting box drilling to completion；
Step S2, TRD engineering method builds Soil-cement Wall；It is initially injected excavation liquid to excavate in advance, loosen soil layer a distance, so
After withdraw excavation to original place, reinject solidify liquid and push ahead and stir into wall；
Step S3, cutting box, which is extracted, to be decomposed.
It by using above-mentioned technical proposal, is excavated by being initially injected excavation liquid, is excavated going out preliminary structure of completing in advance
Afterwards, excavation is withdrawn at a distance, to reduce the structure collapses as caused by earth formation low-intensity and Thief zone characteristic, is then led to
It crosses injection solidify liquid and pushes ahead and stir into wall, and then the construction quality of diaphragm wall.
The present invention is further arranged to: in step s 2, after cutting box drilling to completion, passing through cutting box bottom end first
The bentonite slurry of injection high concentration carries out excavation stratum setting distance in advance and is mixed for the first time with the soil body in situ, then returns
After removing excavation to starting point, slurry backstage replacement cement grout is mixed, cutting box bottom end is injected by mudjack and excavates liquid mixed soil
Slurry is mixed, is solidified into wall.
It is cut in work progress for different construction procedures is different to cutting configuration by using above-mentioned technical proposal
Liquid is cut, and then is had on the basis of improving wall construction speed, the effective construction quality for guaranteeing wall.
The present invention is further arranged to: being tried into wall on the outside of foundation pit and tested, determines the excavation liquid swelling actually used
The construction parameter of native volume, solidify liquid cement mixing content.
By using above-mentioned technical proposal, wall is tried on the outside of foundation pit in construction and is tested, and then simulated in advance
The parameters of current position diaphragm wall are solved, and then to the construction parameter for excavating liquid bentonite volume, solidify liquid cement mixing content
It is configured, to preferably carry out construction excavation.
The present invention is further arranged to: according to the coordinate basis of design drawing point, being calculated examination and is sat at center line of wall angle point
Mark；Laying steel plate is carried out to construction site after examination is at center line of wall setting-out according to weight of equipment.
By using above-mentioned technical proposal, behind the accurate job location of determination, by carrying out laying steel on construction ground
Plate, and then the earth's surface intensity of job location can be effectively improved, it is convenient that installation fixation is carried out to equipment.
The present invention is further arranged to: in step s 2, soil property is explored in timing in work progress, according to soil property feelings
Condition, to the ratio of mud of cutting liquid, solidify liquid, cutting liquid mixing mud, solidify liquid mixing mud TF value be adjusted.
By using above-mentioned technical proposal, in the construction process, periodically soil property is explored, and then understands applying in time
During work, whether soil property changes, and then in time to the ratio of mud of cutting liquid, solidify liquid, cutting liquid mixing mud, solidification
The TF value of liquid mixing mud is adjusted, to preferably carry out excavation construction.
The present invention is further arranged to: in step s3, using extraction cutting box technique outside wall.
By using above-mentioned technical proposal, corner construction, which has, extracts within the walls and extracts two kinds of techniques of cutting box outside wall, uses
To extract technique outside wall, the influence for extracting cutting box to wall can be reduced.
The present invention is further arranged to: every corner should all increase construction surplus to wall outer side when construction, be formed "
Ten " corner coupling head of font formula.
It is formed " ten " by using above-mentioned technical proposal by the corner should all increase construction surplus to wall outer side
The corner coupling head of font formula, and then facilitate staff to extract technique outside using wall, and then can preferably guarantee seam quality.
The present invention is further arranged to: in step s 2, installing two pieces of transparent panels on TRD construction machine host different location
And management point is set, the laser beam of laser transit beats the position monitoring that wall center is carried out on management point.
Management by using above-mentioned technical proposal, by laser longitude and latitude to the transparent panel that TRD construction machine host is arranged in
Point is detected, and then the position at the center of stirring wall carries out accurately monitoring measurement in construction traveling process.
In conclusion advantageous effects of the invention are as follows:
1. being excavated in advance by being initially injected excavation liquid, after preliminary completion structure is excavated out, withdraws and excavate to distant place, to subtract
Then the small structure collapses as caused by earth formation low-intensity and Thief zone characteristic push ahead stirring by injecting solidify liquid
At wall, and then the construction quality of diaphragm wall；
2. using cutting box technique is extracted outside wall, and in construction, every corner should all increase more than construction to wall outer side
Amount, forms the corner coupling head of " ten " font formula, and then can preferably guarantee seam quality；
3. being detected by management point of the laser longitude and latitude to the transparent panel that TRD construction machine host is arranged in, and then go in construction
Accurately monitoring measurement is carried out into the position at the center for stirring wall in the process.
Detailed description of the invention
Fig. 1 is the flow chart of high water level erratic boulder stratum construction of diaphragm wall technique.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment: a kind of high water level erratic boulder stratum construction of diaphragm wall technique, comprising: cutting box is drilled into design by step S1
Depth；Step S2, TRD engineering method builds Soil-cement Wall；Step S3, cutting box, which is extracted, to be decomposed.
Step S1, by cutting box drilling to completion.(1) surveying setting-out.Before construction, first mentioned according to design drawing and owner
The coordinate basis point of confession accurately calculates TRD engineering method water-stop curtain (examination at wall) center line angular coordinate, using measuring instrument into
Row setting-out, and coordinate data review is carried out, while carrying out fender pile.And relevant unit is notified to carry out unwrapping wire review.(2) guiding is excavated
Slot is laid with construction site after the building site TRD water-stop curtain (examination is at wall) center line setting-out according to TRD engineering method weight of equipment
The Reinforcement Measures such as steel plate, it is ensured that construction site meets requirement of the mechanical equipment to foundation bearing capacity, it is ensured that the stabilization of stake machine
Property.Guide groove, groove width about 1.0m, groove depth about 1.0m are excavated at center line of wall parallel direction along examination with excavator.(3) it hangs pre-buried
Case.With the pre-buried cave of excavator cutting depth about 4.9m, length about 2m, width about 1m, using crane and by provided box hang into
In pre-buried cave.(4) stake machine sees the feelings of upper and lower, left and right various aspects clearly in place by stake machine is in place when squad leader assumes unified command of before mobile
Condition, discovery have barrier that should remove in time, check positioning scenarios and timely correction after mobile, stake machine Ying Pingwen, straight and even.
(5) cutting box is connect with host.Cutting box is hung paragraph by paragraph into pre-buried cave with specified crane, is fixed using supporting table；TRD master
Machine is moved to pre-buried acupuncture point and sets connection cutting box, and host returns again to predetermined construction location progress cutting box and voluntarily squeezes into digger
Sequence.By projected depth requirement, the cutting cabinet that one section of a section is connected is cut vertically downward in indentation ground.It hangs down in cutting cabinet
Vertical cut is cut while ensuring vertical precision in indentation ground, also will be in viscosity by the controlling of injecting quantity of cutting fluid in minimum range
Formation variation sharply is prevented in high mixing mud.(6) inclinometer is installed.After cutting box is voluntarily driven into projected depth, peace
Fill inclinometer.By the multisection type inclinometer being mounted on inside cutting box, the vertical precision management of wall can be carried out, it usually can be true
Protect the precision within 1/250.
Step S2, TRD engineering method builds Soil-cement Wall.Wall is tried on the outside of foundation pit to test, and determines practical use
Excavate liquid bentonite volume, solidify liquid cement mixing content construction parameter.According to the coordinate basis of design drawing point, calculate
Try into center line of wall angular coordinate；Laying steel is carried out to construction site after examination is at center line of wall setting-out according to weight of equipment
Plate.After the installation is completed, host is connect inclinometer with cutting box.Excavation liquid, which is injected, in cutting box bottom cuts one section of soil layer in advance
Distance, then excavation is withdrawn to original place, injecting solidify liquid makes it and excavates the stirring of liquid mixing mud Forced Mixing, the solid cements such as formation
Soil stirring diaphragm wall.The control of liquid grout pressure is excavated in 1~1.5Mpa, solidify liquid grouting pressure 2Mpa.By equal thickness soil cement
Stir the unified stacking of the discarded slurry generated during construction of diaphragm wall, centralized processing.
TRD engineering method builds Soil-cement Wall and needs to carry out verticality management to cutting box, is to reach big depth construction
Purpose, the management project that ensures good sealing and carry out.It can be managed by the multistage inclinometer installed inside cutting box
At the vertical precision of wall, the precision within 1/250 generally can ensure that.The vertical line of the wall of TRD diaphragm wall and wall center
Management method is to install two pieces of transparent panels on TRD construction machine host different location and management point is arranged, laser transit swashs
Light ray plays the monitoring position management that wall center is carried out on management point.
Step S3, cutting box, which is extracted, to be decomposed.After trying into wall and each active section construction of Soil-cement Wall, crane is utilized
Cutting box is segmented and is extracted, equipment is transferred to subsequent work face and prepares construction.Under normal circumstances cut cabinet extraction operation, be
After the completion of building cutting, the injection, mixing, whipping procedure of wall, host is separated with cutting cabinet immediately, uses crawler type
Crane extracts cutting cabinet.According to the length, the elevating capacity of crawler crane and operating radius of cutting cabinet, (operation is empty
Between), determine that each unit extracts the specific joint number of cutting cabinet.Generally with 2~3 sections cutting cabinet for a unit.To make to cut
The liquid level for cutting solidify liquid mixing mud when cabinet is extracted will not decline, and need to adjust solidify liquid injection rate and extract speed matching
It closes.The extraction position of cutting cabinet is determined when formulating construction plan, which must assure that operation can be gone on smoothly.One
As in the case of, the extraction position for cutting cabinet is each construction surface into wall final position.In order not to concentrate on corner location.
When transfering to cutting box, using extracting cutting box technique outside wall, when construction, every corner all should be to wall
External side increases construction surplus, forms the corner coupling head of " ten " font formula.The whirl spraying of a φ 1000 should be used at the cold seam of connector
Stake carries out impervious reinforcement.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of high water level erratic boulder stratum construction of diaphragm wall technique, it is characterised in that comprise the following methods:
Step S1, by cutting box drilling to completion；
Step S2, TRD engineering method builds Soil-cement Wall；It is initially injected excavation liquid to excavate in advance, loosen soil layer a distance, so
After withdraw excavation to original place, reinject solidify liquid and push ahead and stir into wall；
Step S3, cutting box, which is extracted, to be decomposed.
2. high water level erratic boulder according to claim 1 stratum construction of diaphragm wall technique, it is characterised in that: in step s 2,
After cutting box drilling to completion, carry out excavating stratum in advance by the bentonite slurry that high concentration is injected in cutting box bottom end first
Setting distance is mixed for the first time with the soil body in situ, then is withdrawn and excavated to starting point, and slurry backstage replacement cement grout is mixed,
Cutting box bottom end, which is injected, by mudjack and excavates liquid mixing mud is mixed, is solidified into wall.
3. high water level erratic boulder according to claim 2 stratum construction of diaphragm wall technique, it is characterised in that: on the outside of foundation pit into
Row examination is tested at wall, determines that is actually used excavates the construction parameter of liquid bentonite volume, solidify liquid cement mixing content.
4. high water level erratic boulder according to claim 3 stratum construction of diaphragm wall technique, it is characterised in that: according to design drawing
Coordinate basis point, calculate examination at center line of wall angular coordinate；It is right after examination is at center line of wall setting-out according to weight of equipment
Construction site carries out laying steel plate.
5. high water level erratic boulder according to claim 4 stratum construction of diaphragm wall technique, it is characterised in that: in step s 2,
Soil property is explored in timing in work progress, according to soil property situation, to the ratio of mud of cutting liquid, solidify liquid, cutting liquid mixing
Mud, solidify liquid mixing mud TF value be adjusted.
6. high water level erratic boulder according to claim 5 stratum construction of diaphragm wall technique, it is characterised in that: in step s 2,
Suitable particle, which is added, in arenaceous stratum construction adjusts material.
7. high water level erratic boulder according to claim 1 stratum construction of diaphragm wall technique, it is characterised in that: in step s3,
Using extraction cutting box technique outside wall.
8. high water level erratic boulder according to claim 7 stratum construction of diaphragm wall technique, it is characterised in that: every turn when construction
Construction surplus should all be increased at angle to wall outer side, form the corner coupling head of " ten " font formula.
9. high water level erratic boulder according to claim 1 stratum construction of diaphragm wall technique, it is characterised in that: in step s 2,
Two pieces of transparent panels are installed on TRD construction machine host different location and management point is set, the laser beam of laser transit is beaten
The position monitoring at wall center is carried out on management point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910606990.6A CN110306531A (en) | 2019-07-06 | 2019-07-06 | High water level erratic boulder stratum construction of diaphragm wall technique |
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| CN201910606990.6A CN110306531A (en) | 2019-07-06 | 2019-07-06 | High water level erratic boulder stratum construction of diaphragm wall technique |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042249A (en) * | 2019-12-27 | 2020-04-21 | 上海建工四建集团有限公司 | Construction method of ultra-deep equal-thickness cement-soil mixing wall under complex geological condition |
| CN111844358A (en) * | 2020-06-12 | 2020-10-30 | 上海市基础工程集团有限公司 | Method for manufacturing cement test block in cement continuous wall construction |
| CN112942310A (en) * | 2021-01-26 | 2021-06-11 | 上海兴庚基础工程有限公司 | Construction process of equal-thickness cement-soil stirring continuous wall |
| CN115627788A (en) * | 2022-12-19 | 2023-01-20 | 中铁二十二局集团轨道工程有限公司 | TRD (blast furnace pressure recovery device) reinforcement construction method for metro section connection channel |
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| CN101565945A (en) * | 2009-05-19 | 2009-10-28 | 上海隧道工程股份有限公司 | Application method of composite sodium-based bentonite on construction of underground continuous wall |
| CN108071128A (en) * | 2018-01-10 | 2018-05-25 | 上海智平基础工程有限公司 | A kind of chain saw type cutting box and its application in ultra-deep TRD engineering methods |
| CN108589699A (en) * | 2018-04-20 | 2018-09-28 | 浙江大学城市学院 | A kind of interpolation H profile steel TRD walls and its construction method |
| CN108951609A (en) * | 2018-08-29 | 2018-12-07 | 北京市政建设集团有限责任公司 | One kind being suitable for soft or hard uneven ovum gravel erratic boulder stratum construction method of underground continuous wall |
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2019
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| CN101565945A (en) * | 2009-05-19 | 2009-10-28 | 上海隧道工程股份有限公司 | Application method of composite sodium-based bentonite on construction of underground continuous wall |
| CN108071128A (en) * | 2018-01-10 | 2018-05-25 | 上海智平基础工程有限公司 | A kind of chain saw type cutting box and its application in ultra-deep TRD engineering methods |
| CN108589699A (en) * | 2018-04-20 | 2018-09-28 | 浙江大学城市学院 | A kind of interpolation H profile steel TRD walls and its construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042249A (en) * | 2019-12-27 | 2020-04-21 | 上海建工四建集团有限公司 | Construction method of ultra-deep equal-thickness cement-soil mixing wall under complex geological condition |
| CN111844358A (en) * | 2020-06-12 | 2020-10-30 | 上海市基础工程集团有限公司 | Method for manufacturing cement test block in cement continuous wall construction |
| CN112942310A (en) * | 2021-01-26 | 2021-06-11 | 上海兴庚基础工程有限公司 | Construction process of equal-thickness cement-soil stirring continuous wall |
| CN115627788A (en) * | 2022-12-19 | 2023-01-20 | 中铁二十二局集团轨道工程有限公司 | TRD (blast furnace pressure recovery device) reinforcement construction method for metro section connection channel |
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Application publication date: 20191008 |