CN110424434A - For filling out the stirring pile water stopping curtain and construction method in the deep area Kuai Shi in sea - Google Patents
For filling out the stirring pile water stopping curtain and construction method in the deep area Kuai Shi in sea Download PDFInfo
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- CN110424434A CN110424434A CN201910680389.1A CN201910680389A CN110424434A CN 110424434 A CN110424434 A CN 110424434A CN 201910680389 A CN201910680389 A CN 201910680389A CN 110424434 A CN110424434 A CN 110424434A
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- 238000010276 construction Methods 0.000 title claims abstract description 106
- 238000003756 stirring Methods 0.000 title claims abstract description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000005553 drilling Methods 0.000 claims abstract description 49
- 239000004575 stone Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 43
- 239000002689 soil Substances 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 239000004927 clay Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 30
- 239000007921 spray Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 238000010348 incorporation Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 239000003673 groundwater Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000000746 body region Anatomy 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
Classifications
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- 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
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- 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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention provides a kind of for filling out the stirring pile water stopping curtain and its construction method in the deep area Kuai Shi in sea.Method includes the following steps: (1) is reinforced along pattern foundation pit supporting structure axis direction by stake is stirred containing soil layer more than block stone layer；(2) drilling drawing hole construction is carried out to the block stone layer that reinforcing is completed using rotary drilling rig；(3) rotary drilling rig drawing hole construction region is subjected to clay backfilling；(4) to it is processed at block stone region be stirred pile water stopping curtain construction.The present invention is by reinforcing soil layer more than block stone region, so as to complete to carry out a point slot section drilling drawing hole construction, and cohesive soil or sand can be backfilled in the borehole, then the construction for carrying out conventional stirring pile water stopping curtain solves the problems, such as that stirring pile water stopping curtain can not construct in the soil layer containing block stone.
Description
Technical field
The present invention relates to geotechnical engineering fields, and in particular to a kind of for filling out the stirring pile water stopping curtain in the deep area Kuai Shi in sea
And its construction method.
Background technique
In level of ground water height, earth formation and complicated hydrogeological conditions (deep block stone layer, border on the sea deep enrockment area, ovum
Rock layers) it is regional, during carrying out foundation pit support construction, to prevent in Groundwater infiltration foundation pit, carried out on the outside of foundation pit supporting pile
A row or multi-row stirring pile water stopping curtain construction, mixing pile are mutually twisted, and are formed a circle closure in foundation pit supporting pile periphery and are stopped
Aqueous systems.But when stone containing block, jackstone, cobble and building waste in stratum, does not adopt and accordingly take measure by block stone, jackstone, cobble
And building waste is dug out, mixing pile can not construct in the region soil layer.
The Chinese invention patent of Patent No. 201510621731.2 discloses a kind of for the sealing containing block stone region
Curtain and its construction method, the construction method be on the outside of the foundation pit in the region containing block stone, the predeterminated position of water-stop curtain opens
The discharge guide groove for discharging mud is dug, then in a predeterminated position construction at least column rotary churning pile for water-stop curtain, adjacent rotation
Spray the engaged composition water-stop curtain of stake, although this method can solve can not construct the asking of mixing pile in the soil layer containing block stone
Topic.It, then will be preparatory but since rotary churning pile is that rotary jet grouting pipe and spray head brill are placed in a bottom design altitude using rotary drilling rig
Prepared slurries eject after so that liquid stream is obtained huge energy by high-voltage generator from the nozzle high speed of slip casting tube edge
Come, drilling rod is promoted in rotation, is sufficiently stirring and mixing to form slurries and the soil body.If soil layer intensity does not reach requirement, In
It is easy to cannot achieve the construction of rotary churning pile there is a phenomenon where collapse hole in boring procedure.Especially in reclaimation area domain, since it is applied
Work area domain is surrounded by sea on three sides, and level of ground water is consistent with sea level absolute altitude, and the tidal effect by sea is larger, and upper formation is predominantly blown
Back-up sand layer is in loose condition (of surface), and highly permeable layer, hydraulic reclamation layer of sand infiltration coefficient is 2.0 × 10-2cm/s or so, soil layer construction pine
It dissipates, self-stability is poor, and jet drill rig is in carrying out boring procedure, it is easy to the phenomenon that collapse hole occurs, not can guarantee construction
Safety and feasibility.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of for filling out applying for the stirring pile water stopping curtain in the deep area Kuai Shi in sea
Work method, this method can be in the case where guaranteeing back-up sand layer stability, and effectively solving stirring pile water stopping curtain can not contain
The soil layer construction problem of block stone.
To solve the above-mentioned problems, the present invention provides a kind of for filling out the stirring pile water stopping curtain in the deep area Kuai Shi in sea,
Be characterized in that: the water-stop curtain includes the cement mixing method body for being placed in block stone layer or more, is placed in cement mixing method body region range
Interior backfill layer and the mixing pile water sealing structure being placed within the scope of backfill layer region, the cement mixing method body are stirred using multiple rows of
It mixes stake and is mutually twisted composition, mixing pile water sealing structure is mutually twisted by more cement mixing piles and is formed；The backfill layer is to adopt
After dividing slot section interval pilot hole in cement mixing method body region with rotary drilling rig, what backfill clay or sand were formed in hole is filled out
Soil layer, and it is stirred the construction of a water sealing structure after the completion of fill stratum construction in each pilot hole slot section, and backfill layer
The depth that depth is equal to or more than mixing pile water sealing structure is backfilled, width is greater than the width of stirring water-stop structure；It is the multiple to draw
Hole slot section and the backfill layer being placed in pilot hole slot section, mixing pile water sealing structure are linked together, two neighboring rotary drilling rig
Pilot hole overlaps.
The present invention preferably technical solution: the cement mixing method body is to be mutually twisted to be formed by 5~8 row's cement mixing piles
's；Each stirring water-stop stake of the stirring water-stop structure is constructed completion in such a way that two sprays two are stirred；The cement mixing method
It body and mixes water sealing structure and is all made of that uniaxial mixing pile machine or multi-shaft stirring stake machine are beaten using set or overlapped that mode is constructed.
The present invention preferably technical solution: the length of the pilot hole slot section is 3~6m, and two neighboring rotary drilling rig pilot hole
Between the width that is overlapped be greater than mixing pile water sealing structure single stirring water-stop stake diameter；Stop in the stirring of adjacent pilot hole slot section
Plain concrete piling structure is equipped on the outside of water-bound connection gap.
The present invention preferably technical solution: complete in the pilot hole of two interval pilot hole slot sections, backfill and stirring water-stop pile driving construction
Cheng Hou when stirring water-stop stake intensity reaches 50~70%, then carries out pilot hole slot section region between two interval pilot hole slot sections
The construction of pilot hole, backfill and stirring water-stop stake.
Technical solution provided by the invention are as follows: described a kind of for filling out applying for the stirring pile water stopping curtain in the deep area Kuai Shi in sea
Work method, the construction including foundation pit supporting construction, in the outside of foundation pit supporting construction construction stirring pile water stopping curtain, feature exists
In for the water-stop curtain in foundation pit stone containing block region its Specific construction, steps are as follows:
(1) along pattern foundation pit supporting structure axis direction, the above soil layer of block stone layer in region containing block stone layer is stirred stake and is reinforced,
Its reinforcing area width is greater than the construction width of water-stop curtain；
(2) pilot hole subregion is carried out according to the predeterminated position that water-stop curtain in the block stone layer region of reinforcing is completed, is divided into length
Spend the second pilot hole slot section of the first pilot hole slot section and 3~5m of length for 4~6m, and the first pilot hole slot section and the second pilot hole slot section
It is spaced apart；When mixing pile intensity reaches 70% in step (1), it is first directed to the first pilot hole slot section using rotary drilling rig and is bored
Into pilot hole, then rotary drilling rig pilot hole depth and the consistent in or greater than water-stop curtain projected depth of water-stop curtain projected depth will
Drilling rod is proposed out of hole, is overlapped between two neighboring pilot hole in each first pilot hole slot section, and multiple after the completion of constructing draw
Hole is interconnected；
(3) cavity in the first pilot hole slot section after the completion of drilling construction in step (2) is carried out using clay or sand
Backfill, and be compacted, the construction of pile water stopping curtain is then stirred in backfill region；
(4) adjacent two when the water-stop curtain mixing pile intensity in two adjacent first pilot hole slot sections reaches 50~70%
Drawing hole construction, the first pilot hole slot in form of construction work and step (2) are carried out in the second pilot hole slot section between first pilot hole slot section
The form of construction work of section is identical, the pilot hole at the second pilot hole slot section both ends and the sealing curtain in the first pilot hole slot section of completion of having constructed
Curtain is overlapped；
(5) step (3) are repeated to be backfilled for the hole region in the second pilot hole slot section, and after being compacted back filled region into
The first pilot hole slot that the construction of row stirring pile water stopping curtain, the stirring pile water stopping curtain of the second pilot hole slot section and two sides are formerly constructed
Stirring pile water stopping curtain in section is linked together.
The present invention preferably technical solution: after step (5) construction is completed, in the mixing pile sealing curtain of the second pilot hole slot
Curtain and the stirring pile water stopping curtain connecting portion for the first pilot hole slot section formerly constructed are used far from the side of foundation pit supporting construction
Mix single or more plain concrete bored concrete pile of C15 concrete construction of swelling agent, single or more plain concrete bored concrete pile with
Pile water stopping curtain overlap joint is stirred with a thickness of 8~12cm, it is long long equal with stake that is stirring pile water stopping curtain；When using single
When plain concrete bored concrete pile, 1200mm is had a diameter larger than or is equal to；When using more plain concrete bored concrete piles, every plain coagulation
The diameter of native bored concrete pile is suitable with the stirring mixing pile diameter of pile water stopping curtain, and phase interconnection between multiple plain concrete bored concrete piles
It connects.
The present invention preferably technical solution: cement mixing method includes constructing along foundation pit axis direction in the step (1)
5~8 row's cement mixing piles, every row's mixing pile construction carries out the construction of second row mixing pile, every stirring immediately after completing
The stirring depth of stake is mutually twisted between adjacent mixing pile to block stone layer top surface is contained.
The present invention preferably technical solution: when in step (2) using rotary drilling rig pilot hole, while using mud off,
And stop drilling after creeping into projected depth, drilling rod is proposed out of hole, block stone is dug out, adjacent two in each pilot hole slot section
The width to overlap between a pilot hole is greater than the single mixing pile diameter of water-stop curtain；The performance indicator of its slurry coat method is such as
Under: 1.05~1.20 r of simulated mud specific gravity, viscosity are less than 28s, and sand factor is less than 8%, and colloidity is greater than 96%, and percentage of water loss is small
In or equal to 25ml/30min, pH value is 7~10.
The present invention preferably technical solution: the backfill in the step (3) uses back-filling in layers, and every layer of backfill depth is
1.5~2.5m, and be compacted after every layer of backfill using rotary drilling rig, then carry out next layer of backfilling working；Each pilot hole slot section is applied
Work and backfilling working control are within for 24 hours.
The present invention preferably technical solution: the stirring pile water stopping curtain in the step (3) and step (5) is using three axis
Mixing pile construction forms, and work progress is in such a way that two sprays two are stirred, and controlling cement mixing content is 25%~35%, the ratio of mud
It is 1.0~1.2.
Beneficial effects of the present invention:
(1) present invention first reinforces soil layer more than block stone region using blender, then uses rotary drilling rig
Carry out pilot hole, it is mixing pile plus it is effective avoid the hole that collapses occur during the rotary drilling rig pilot hole, to guarantee to connect
Continue adjacent pilot hole, final grooving；It is mutually twisted between pile body during mixing pile construction, is conducive to improve the whole strong of reinforcing body
Degree；
(2) the rotary drilling rig pilot hole depth in the present invention is consistent with water-stop curtain projected depth, can effectively draw block stone
Water-stop curtain projected depth is depressed into hereinafter, continuously taking native cleaning bottom of hole out or by block stone, and avoiding block stone in water-seal pile depth can not take
Only, the depth of general water-stop curtain reaches clay layer, and pilot hole to clay layer, using open type hosqe bit, clay has adhesive aggregation
Partial block stone band can be portalled outer, also ensure that water-seal pile stake is long, it is ensured that the quality of water-stop curtain by power；
(3) present invention, which uses, divides slot section drawing hole construction stirring water-stop stake, and uses interval trough section pilot hole, the construction of interval trough section
There is the hole phenomenon that collapses after preventing grooving in water-seal pile mode, should carry out in time sand after pilot hole grooving and be backfilled；
(4) present invention is to the hole in rotary digging pilot hole region using cohesive soil or sand backfill and compaction in layers, it is ensured that backfill
The intensity of soil layer reaches construction requirement, can facilitate the construction of later period stirring pile water stopping curtain.
(5) this present invention is when using rotary drilling rig pilot hole, using mud off can to reinforcing body layer of sand below into
Row Gu Bi, prevents the soil body from collapsing, and mud, according to geological conditions, forming hole method and mud purposes etc. carry out mud trial system, really
Determine the match ratio of mud, it is ensured that the retaining wall performance of mud.
(6) since backfill layer of sand lower part can not be closely knit, cavity easy to form, each primary stirring of about one three axes agitating pile can
Hole area can not be formed, along with back filled region is the sandy soil of saturation, the solidification of traditional cements volume and saturation sandy soil
Price differential influences mixing pile Forming Quality；The present invention is used to block stone region mixing pile using repeating to stir once, i.e., two sprays two are stirred
Mode construct, while adjust cement mixing content be 35%, the ratio of mud is adjusted to 1.0, avoid backfill layer of sand hole area
The problem with Forming Quality difference can not be formed；
(7) plain stake piling is carried out at the cold seam that the present invention occurs for the connecting portion of two slot sections of outermost, avoided
The appearance of cold seam, plain stake and interior campshed overlap joint thickness about 10cm or so, stake is long with interior campshed, guarantees piling effect.
The present invention is by reinforcing soil layer more than block stone region, so as to complete to carry out a point slot section drilling pilot hole
Construction, and cohesive soil or sand can be backfilled in the borehole, the construction of conventional stirring pile water stopping curtain is then carried out, is solved
Stirring pile water stopping curtain can not be the problem of the soil layer containing block stone be constructed.
Detailed description of the invention
Fig. 1 is the present invention for the mixing pile floor map containing block stone region；
Fig. 2 is the enlarged drawing of B location in Fig. 1；
Fig. 3 is the longitudinal sectional drawing of water-stop curtain in the present invention；
Fig. 4-1 to Fig. 4-3 is a point step schematic diagram for slot section drawing hole construction water-stop curtain；
Fig. 5 is the diagrammatic cross-section after the completion of cement mixing method body；
Fig. 6 is the diagrammatic cross-section after the completion of present invention drilling；
Fig. 7 is the floor map of plain concrete piling structure；
Fig. 8 is the work progress schematic diagram of stirring water-stop stake in the present invention.
In figure: 10-block stone layers, 11-cement mixing method bodies, 12-mixing pile water sealing structures, 13-rotary drilling rig pilot holes,
14-the first pilot hole slot section, 15-backfill layers, the 16-the second pilot hole slot section, 17-plain concrete piling structures, 18-foundation pit branch
Protection structure.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.Attached drawing 1 to Fig. 6 be the attached of embodiment
Figure, is drawn by the way of simplified, is only used for purpose that is clear, compactly illustrating the embodiment of the present invention.Below in the accompanying drawings
The technical solution showed be the embodiment of the present invention concrete scheme, it is not intended that limit the model of claimed invention
It encloses.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "inner", "outside", "left", "right" etc. indicate
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put
Orientation or positional relationship or the orientation or positional relationship that usually understands of those skilled in the art, be merely for convenience of retouching
It states the present invention and simplifies description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.
What is provided in embodiment is a kind of for filling out the stirring pile water stopping curtain in the deep area Kuai Shi in sea, specific structure such as Fig. 1
To shown in Fig. 3, which includes the cement mixing method body 11 for being placed in 10 or more block stone layer, is placed in cement mixing method body 11
Backfill layer 15 in regional scope adds with the mixing pile water sealing structure 12 backfilled in 15 regional scope of layer, the mixing pile is placed in
Solid 11 is to be mutually twisted to be formed by 5~8 row's cement mixing piles；Mixing pile water sealing structure 12 is by more cement mixing piles
It is mutually twisted composition；And it mixes each stirring water-stop stake of water sealing structure 12 and constructs in such a way that two sprays two are stirred completion；It is described to stir
It mixes a reinforcing body 11 and mixes water sealing structure 12 and be all made of that three axes agitating pile machine is beaten using set or overlapped that mode is constructed.Institute
Stating backfill layer 15 is after dividing slot section interval pilot hole in 11 region of cement mixing method body using rotary drilling rig, to backfill in hole
The fill stratum that clay or sand are formed, and a sealing knot is stirred after the completion of fill stratum construction in each pilot hole slot section
The construction of structure 12 divides the process of slot section drawing hole construction as shown in Fig. 4-1 to Fig. 4-3, two interval pilot hole slot sections pilot hole,
After the completion of backfill and stirring water-stop pile driving construction, when stirring water-stop stake intensity reaches 50~70%, then carries out two intervals and draw
The construction of the pilot hole in region, backfill and stirring water-stop stake between hole slot section.The backfill depth of the backfill layer 15 is equal to stirring
The depth of stake water sealing structure 11, width are greater than the width of stirring water-stop structure 12；The multiple pilot hole slot section and it is placed in pilot hole
Backfill layer 15, mixing pile water sealing structure 12 in slot section are linked together, two neighboring 13 phase mutual respect of rotary drilling rig pilot hole
It closes, the width being overlapped is greater than the diameter of the single stirring water-stop stake of mixing pile water sealing structure 12, in stirring for adjacent pilot hole slot section
It mixes and is equipped with plain concrete piling structure 17 on the outside of 12 connection gap of water sealing structure.
Construction method of the invention is further illustrated combined with specific embodiments below, embodiment borders on the sea deep time for certain
Fill block stone region, the region use rubble mounding for sea-reclamation technique, and place is surrounded by sea on three sides, and level of ground water is consistent with sea level absolute altitude, stratum
Structure and complicated hydrogeological conditions (deep block stone layer, deep enrockment area of bordering on the sea) area, the tidal effect by sea is larger, on
Portion stratum is mainly hydraulic reclamation layer of sand, is in loose condition (of surface), loosely organized, self-stability is poor.The foundation pit perimeter 590 of the project under construction
Rice, 15.5~17.5 meters of depth, pattern foundation pit supporting structure mainly uses bored concrete pile+water-stop curtain+twice inner support+preceding passive area of stake to add
Solid support form, water-stop curtain of constructing outside pattern foundation pit supporting structure, sealing mode is using three axes agitating pile sealing curtain on the outside of support pile
Curtain, water-stop curtain stake diameterStake spacing 1200mm, using the construction of one hole of socket, stirring pile water stopping curtain is located at
On the outside of the bored concrete pile of foundation pit supporting construction, and a complete foundation pit supporting system is formed with bored concrete pile, stirs pile water stopping curtain
Implemented by the way of being mutually twisted along pattern foundation pit supporting structure direction.
According to water-seal pile exploration report and field test, block stone is backfilled mainly 10 meters or so under overburden layer, for caisson shield
Bank heap block stone, the water-stop curtain construction area of the project is as shown in Figure 1, contain many places block stone layer region, conventional mixing pile
Water-stop curtain can not normal construction, so Project Technical personnel using the present invention in method construct, Specific construction step
It is rapid as follows:
(1) it in order to avoid ground subsidence, collapse accident occurs during rotary drilling rig drawing hole construction, is needed first to block stone layer
10 are stirred a consolidation process with overlying strata, form the cement mixing method body 11 with some strength, cement mixing method body
Including 5 draining mud mixing piles, first row mixing pile construction, first row construction are carried out to region containing block stone layer using mixing pile machine
After the completion, second row construction is carried out immediately, and so on, it successively constructs to the 5th drained at ultimately forming cement mixing method body
11, as shown in figure 5,11 depth of cement mixing method body, to the top surface containing block stone layer 10,5 draining mud mixing piles are stirred using three axis
It mixes ram machine construction to form, adjacent pile body is directly mutually twisted, and forms the ruggedized construction of an entirety；And according to field condition,
Close on sea section and east gate section in outside (danger zone) add on the original basis interior outside respectively add three axis of a row stirring
Stake (reinforcing pile), remaining section do not increase；
(2) pilot hole subregion, subregion are carried out according to the predeterminated position that water-stop curtain in the block stone layer region of reinforcing is completed
Schematic diagram is divided into the first pilot hole slot section 14 of 4.5m long and the second pilot hole slot section 16 of 3.6m long as shown in Fig. 4-1 to Fig. 4-2；
When mixing pile intensity reaches 70% in step (1), as shown in Fig. 4-1, the first pilot hole slot section 14 is first directed to using rotary drilling rig
Drilling pilot hole is carried out, rotary drilling rig pilot hole depth is consistent with water-stop curtain projected depth, then proposes drilling rod out of hole, often
It overlaps between two neighboring pilot hole in a pilot hole slot section, and overlap width is greater than the straight of single water-stop curtain mixing pile
Diameter, multiple pilot holes after the completion of constructing are interconnected；When using rotary drilling rig pilot hole, add because block stone lower section does not carry out the soil body
Gu, it is necessary to mud off is used, main function of the mud in pore forming process is solid wall reinforcing body layer of sand below, prevents the soil body
It collapses, before mixing mud, according to geological conditions, forming hole method and mud purposes etc. carry out mud trial system, determine matching for mud
Composition and division in a proportion, the performance indicator for preparing mud reach claimed below: simulated mud 1.05~1.20r of specific gravity, and viscosity is less than 28s, contain sand
Rate is less than 8%, and colloidity is greater than 96%, and percentage of water loss is less than or equal to 25ml/30min, and pH value is 7~10；Rotary drilling rig is boring
Stop drilling after proceeding to projected depth, drilling rod is proposed out of hole, block stone is dug out, two neighboring pilot hole in each pilot hole slot section
Between the width that overlaps be greater than the single mixing pile diameter of water-stop curtain；
(3) as shown in the Fig. 4-2, using clay or sand to the first pilot hole slot section after the completion of drilling construction in step (2)
Interior cavity is backfilled, back-filling in layers, and every layer of backfill depth is 1.5~2.5m, and uses rotary drilling rig pressure after every layer of backfill
It is real, then carry out next layer of backfilling working；The construction of each pilot hole slot section and backfilling working control are within for 24 hours；In backfilling working
After completion, in backfill region construction stirring pile water stopping curtain, every stirring water-stop stake is primary using repeating to stir, i.e., two sprays two
It stirs, while adjusting cement mixing content is 35%, the ratio of mud is adjusted to 1.0, the work progress of every stirring water-stop stake such as Fig. 8 institute
Show；
(4) when the water-stop curtain mixing pile intensity in two adjacent the first pilot hole slot sections 14 reaches 50~70%, such as
Shown in Fig. 4-3, the second pilot hole slot section 16 between two adjacent first pilot hole slot sections 14 carries out drawing hole construction, form of construction work
It is identical as the form of construction work of the first pilot hole slot section 14 in step (2), the pilot hole at 16 both ends of the second pilot hole slot section with constructed
At the first pilot hole slot section 14 in water-stop curtain be overlapped；
(5) it is backfilled for the perforated in the second pilot hole slot section 16, and is returned after being compacted in the second pilot hole slot section 16
The construction that area is stirred pile water stopping curtain is filled out, backfilling process and the construction for stirring pile water stopping curtain are identical as step (3),
And second pilot hole slot section 16 stirring pile water stopping curtain and the first pilot hole slot section 14 for formerly constructing of two sides in mixing pile sealing
Curtain is linked together；
(6) after step (5) construction is completed, in the stirring pile water stopping curtain and the first pilot hole slot of the second pilot hole slot section 16
It is applied using the C15 concrete of incorporation swelling agent side of the stirring pile water stopping curtain connecting portion of section 14 far from foundation pit supporting construction
The single plain concrete bored concrete pile of work diameter 1200mm, single plain concrete bored concrete pile and stirring pile water stopping curtain overlap joint with a thickness of
8~12cm is long long equal with the stake of stirring pile water stopping curtain.
In the construction process, to prevent drilling machine with outer incline, crawler travel route is laid with 6*2 meters to embodiment, thickness 30cm
Steel plate.Fashioned iron 700mm*12m reduces inside aperture pressure to support to aperture opposite.Each pilot hole slot section interior for 24 hours must be completed simultaneously
And the same day completes backfill, forbids the successful hole of pilot hole placement overnight.
Stirring pile water stopping curtain and its construction method for block stone region of the invention, can effectively solve mixing pile without
Method is in the soil layer construction problem containing block stone.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of for filling out the stirring pile water stopping curtain in the deep area Kuai Shi in sea, it is characterised in that: the water-stop curtain includes being placed in block
It more than rock layers (10) cement mixing method body (11), the backfill layer (15) being placed in cement mixing method body (11) regional scope and sets
Mixing pile water sealing structure (12) in backfill layer (15) regional scope, the cement mixing method body (11) are using multiple rows of stirring
Stake is mutually twisted composition, and mixing pile water sealing structure (12) is mutually twisted by more cement mixing piles and is formed；The backfill layer
(15) be after dividing slot section interval pilot hole in cement mixing method body (11) region using rotary drilling rig backfilled in hole clay or
Sand formed fill stratum, and in each pilot hole slot section fill stratum construction after the completion of be stirred a water sealing structure (12)
Construction, and the backfill depth for backfilling layer (15) is equal to or more than the depth of mixing pile water sealing structure (11), width, which is greater than stirring, to be stopped
The width of water-bound (12)；The multiple pilot hole slot section and the backfill layer (15) being placed in pilot hole slot section, mixing pile sealing knot
Structure (12) is linked together, and two neighboring rotary drilling rig pilot hole (13) overlaps.
2. according to claim 1 a kind of for filling out the stirring pile water stopping curtain in the deep area Kuai Shi in sea, it is characterised in that: institute
Stating cement mixing method body (11) is to be mutually twisted to be formed by 5~8 row's cement mixing piles；The stirring water-stop structure (12) it is every
A stirring water-stop stake is constructed completion in such a way that two sprays two are stirred；The cement mixing method body (11) and to mix water sealing structure (12) equal
It is beaten using uniaxial mixing pile machine or multi-shaft stirring stake machine using set or overlapped that mode is constructed.
3. according to claim 1 a kind of for filling out the stirring pile water stopping curtain in the deep area Kuai Shi in sea, it is characterised in that: institute
The length for stating pilot hole slot section is 3~6m, and the width being overlapped between two neighboring rotary drilling rig pilot hole (13) stops greater than mixing pile
The diameter of the single stirring water-stop stake of water-bound (12)；On the outside of stirring water-stop structure (12) connection gap of adjacent pilot hole slot section
Equipped with plain concrete piling structure (17).
4. according to claim 1 a kind of for filling out the stirring pile water stopping curtain in the deep area Kuai Shi in sea, it is characterised in that: In
After the completion of the two interval pilot holes of pilot hole slot sections, backfill and stirring water-stop pile driving construction, stirring water-stop stake intensity reaches 50~
When 70%, then carry out pilot hole, backfill and the construction of stirring water-stop stake in the pilot hole slot section region between two interval pilot hole slot sections.
5. a kind of for filling out the construction method of the stirring pile water stopping curtain in the deep area Kuai Shi in sea, applying including foundation pit supporting construction
Work, in the outside of foundation pit supporting construction construction stirring pile water stopping curtain, which is characterized in that for the sealing in foundation pit stone containing block region
Steps are as follows for curtain its Specific construction:
(1) along pattern foundation pit supporting structure axis direction, the above soil layer of block stone layer in region containing block stone layer is stirred stake and is reinforced, is added
Gu peak width is greater than the construction width of water-stop curtain；
(2) pilot hole subregion is carried out according to the predeterminated position that water-stop curtain in the block stone layer region of reinforcing is completed, being divided into length is 4
The first pilot hole slot section of~6m and the second pilot hole slot section of 3~5m of length, and the first pilot hole slot section and the second pilot hole slot section interval
Distribution；When mixing pile intensity reaches 70% in step (1), it is first directed to the first pilot hole slot section using rotary drilling rig and creep into and draws
Hole, rotary drilling rig pilot hole depth and the consistent in or greater than water-stop curtain projected depth of water-stop curtain projected depth, then by drilling rod
It proposes out of hole, overlaps between two neighboring pilot hole in each first pilot hole slot section, multiple pilot hole phases after the completion of constructing
It is intercommunicated；
(3) cavity in the first pilot hole slot section after the completion of drilling construction in step (2) is backfilled using clay or sand,
And be compacted, the construction of pile water stopping curtain is then stirred in backfill region；
(4) when the water-stop curtain mixing pile intensity in two adjacent first pilot hole slot sections reaches 50~70%, two adjacent first
Drawing hole construction is carried out in the second pilot hole slot section between pilot hole slot section, the first pilot hole slot section in form of construction work and step (2)
Form of construction work is identical, the pilot hole at the second pilot hole slot section both ends and the water-stop curtain weight in the first pilot hole slot section of completion of having constructed
It closes；
(5) step (3) are repeated to be backfilled for the hole region in the second pilot hole slot section, and is stirred after being compacted in back filled region
The construction of pile water stopping curtain is mixed, in the first pilot hole slot section that the stirring pile water stopping curtain of the second pilot hole slot section and two sides are formerly constructed
Stirring pile water stopping curtain be linked together.
6. it is according to claim 1 a kind of for filling out the construction method of the stirring pile water stopping curtain in the deep area Kuai Shi in sea,
It is characterized in that: after step (5) construction is completed, first drawing in the stirring pile water stopping curtain of the second pilot hole slot with what is formerly constructed
The stirring pile water stopping curtain connecting portion of hole slot section is far from the side of foundation pit supporting construction using the C15 concrete of incorporation swelling agent
It constructs single or more plain concrete bored concrete pile, single or more plain concrete bored concrete pile and stirring pile water stopping curtain overlap thickness
It is long long equal with the stake of stirring pile water stopping curtain for 8~12cm；When using single plain concrete bored concrete pile, diameter
More than or equal to 1200mm；When using more plain concrete bored concrete piles, the diameter and mixing pile of every plain concrete bored concrete pile
The mixing pile diameter of water-stop curtain is suitable, and mutually overlaps between multiple plain concrete bored concrete piles.
7. it is according to claim 5 or 6 a kind of for filling out the construction method of the stirring pile water stopping curtain in the deep area Kuai Shi in sea,
It is characterized by: cement mixing method includes 5~8 row's cement mixing piles constructed along foundation pit axis direction in the step (1),
Every row's mixing pile construction carries out the construction of second row mixing pile immediately after completing, the stirring depth of every mixing pile is to containing block stone
Layer top surface, is mutually twisted between adjacent mixing pile.
8. it is according to claim 1 a kind of for filling out the construction method of the stirring pile water stopping curtain in the deep area Kuai Shi in sea,
It is characterized in that: when in step (2) using rotary drilling rig pilot hole, while using mud off, and after creeping into projected depth
Stop drilling, drilling rod is proposed out of hole, block stone is dug out, is overlapped between two neighboring pilot hole in each pilot hole slot section
Width is greater than the single mixing pile diameter of water-stop curtain；The performance indicator of its slurry coat method is as follows: simulated mud specific gravity 1.05~
1.20r, viscosity are less than 28s, and sand factor is less than 8%, and colloidity is greater than 96%, and percentage of water loss is less than or equal to 25ml/30min, pH
Value is 7~10.
9. it is according to claim 1 a kind of for filling out the construction method of the stirring pile water stopping curtain in the deep area Kuai Shi in sea,
Be characterized in that: the backfill in the step (3) is using back-filling in layers, and every layer of backfill depth is 1.5~2.5m, and after every layer of backfill
It is compacted using rotary drilling rig, then carries out next layer of backfilling working；The construction of each pilot hole slot section and backfilling working control for 24 hours with
It is interior.
10. it is according to claim 1 a kind of for filling out the construction method of the stirring pile water stopping curtain in the deep area Kuai Shi in sea,
Be characterized in that: the stirring pile water stopping curtain in the step (3) and step (5) is constructed using three axes agitating pile, is applied
Work process is in such a way that two sprays two are stirred, and controlling cement mixing content is 25%~35%, and the ratio of mud is 1.0~1.2.
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| CN201910680389.1A CN110424434B (en) | 2019-07-26 | 2019-07-26 | Stirring pile waterproof curtain for sea filling deep block stone area and construction method |
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| CN110424434B (en) | 2021-09-07 |
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Address after: 430080 No. 17 metallurgical Avenue, Qingshan District, Hubei, Wuhan Patentee after: MCC Wukan Engineering Technology Co.,Ltd. Address before: 430080 No. 17 metallurgical Avenue, Qingshan District, Hubei, Wuhan Patentee before: WUHAN SURVEYING GEOTECHNICAL RESEARCH INSTITUTE Co.,Ltd. OF MCC |