CN110409511A - A kind of interlocking pile and ground-connecting-wall seam crossing water-stopping method - Google Patents
A kind of interlocking pile and ground-connecting-wall seam crossing water-stopping method Download PDFInfo
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- CN110409511A CN110409511A CN201910669418.4A CN201910669418A CN110409511A CN 110409511 A CN110409511 A CN 110409511A CN 201910669418 A CN201910669418 A CN 201910669418A CN 110409511 A CN110409511 A CN 110409511A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- 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
- E02D31/02—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 against ground humidity or ground water
Abstract
The invention belongs to construction engineering technical fields, it is related to a kind of interlocking pile and diaphram wall seam crossing water-stopping method, Yao He Zhuan Quan are alternatively arranged with interlocking pile element stake, it is mutually twisted to form interlocking pile, ground-connecting-wall is engaged with adjacent interlocking pile element stake, steel floral tube is welded on ground-connecting-wall and the steel reinforcement cage of adjacent interlocking pile element stake sides adjacent, Grouting Pipe is embedded on the outside of the stake of interlocking pile element and ground-connecting-wall seam crossing, rotary churning pile is located on the outside of the stake of interlocking pile element and ground-connecting-wall seam crossing, it is engaged by ground-connecting-wall with adjacent pile body, steel floral tube is buried between ground-connecting-wall wall and interlocking pile, double rows slip casting pipe is set on the outside of ground-connecting-wall and interlocking pile seam, and a series of structures and the measures such as rotary churning pile reinforcing are carried out on the outside of interlocking pile and ground-connecting-wall, solve the problems, such as interlocking pile and diaphram wall seam crossing sealing, improve the waterproof and leakage resistance energy of seam crossing, enhance base The stability and safety in hole.
Description
Technical field:
The invention belongs to construction engineering technical field, the interlocking pile and diaphram wall for being related to a kind of foundation pit supporting construction are connect
Water-stopping method at seam.
Background technique:
As China's subway engineering is more and more, all kinds of building denses in city underground foundation pit periphery, ambient enviroment and water and soil
Complex geologic conditions, difficulty of construction is big, this will explore new pattern foundation pit supporting structure mode.
Currently, the common pattern foundation pit supporting structure form of subway engineering has interlocking pile and diaphram wall etc..Interlocking pile refers to plane
Between the campshed of arrangement adjacent studs be mutually twisted by reinforced concrete pile and plain stake and the foundation pit supporting construction that is formed, with this as
The foundation pit supporting construction of subway engineering.Interlocking pile is more lower than the diaphram wall ratio of reinforcement, because using reinforced column and element
The spaced apart form of construction work of concrete-pile can largely reduce the ratio of reinforcement, the saving fund of supporting construction.Interlocking pile
Impermeability is strong, because it continuously constructs, there is no cold stitch of constructing also not to be mingled with soil for intercolumniation, and diaphram wall framing
The cold seam of the construction of joint, the often weak link of antiseepage, if diaphram wall brush wall effect is not in place, to leave infiltration hidden
Suffer from.It is flexible to be engaged pile driving construction, because interlocking pile can according to need turnover modified line, more suitable for being applied to some foundation pit sides
The changeable pattern foundation pit supporting structure of wall.
Diaphram wall is to act on by the retaining wall of mud using various trench machines, dig out a scale in design position
Very little groove, then lifting decentralization steel reinforcement cage, is poured concrete and is formed and have both the continuous of antiseepage, earth-retaining and load-bearing effect together
Underground wall body.Vibration is smaller when construction of diaphragm wall, and noise is lower, smaller on periphery influence, is suitble in municipal construction.Underground
Diaphragm wall rigidity is big, and biggish soil pressure can be born after excavation of foundation pit, settlement of foundation or landslide seldom occur in engineer application
Accident, and diaphram wall wall barrier performance itself is preferable, if joint form and the proper diaphram wall of construction method
Sealing anti-seepage effect it is preferable.Diaphram wall is suitable for a variety of geological conditions, has wide range of applications.
If interlocking pile is combined with diaphram wall, two kinds of supportings are used according to geological conditions simultaneously in same engineering
Structure, the advantages of both can making full use of.But the sealing problem of interlocking pile and diaphram wall seam crossing is weight difficult point, occlusion
With ground-connecting-wall seam once percolating water situation occurs, not only plugging operation is very difficult, but also will influence whether foundation pit and week for stake
The safety of surrounding environment.There is presently no a kind of effective system construction methods.Therefore, a kind of interlocking pile and ground-connecting-wall are designed
Seam crossing water-stopping method is extremely urgent.
Summary of the invention:
It is an object of the invention to overcome disadvantage of the existing technology, for interlocking pile and ground-connecting-wall seam crossing percolating water
Problem, design provide the water-stopping method of a kind of interlocking pile and diaphram wall seam crossing, improve the waterproof and anti-leakage of seam crossing
Performance enhances the stability and safety of foundation pit.
To achieve the goals above, the present invention is realized by interlocking pile and ground-connecting-wall seam crossing water sealing structure, detailed process
Are as follows:
Step 1: carrying out the construction of interlocking pile, being engaged with ground-connecting-wall is interlocking pile element stake, and after unwrapping wire positioning, drilling machine is just
Position, soil taking hole forming is until design bottom hole absolute altitude, and for example Yao He Zhuan Quan hang steel reinforcement cage after pore-forming passed examination, and after-pouring is mixed
Solidifying soil tube drawing pile；
Step 2: the preparation of ground-connecting-wall construction positions construction of guide wall using the unwrapping wire that prior art carries out ground-connecting-wall,
Mud is prepared, grooving is then tried；
Step 3: ground-connecting-wall routine grooving according to design requirement and leads the position that wall determines ground-connecting-wall, and chute forming machine is opened
Operation is dug, mud off is used when grooving, until depth is identical as adjacent interlocking pile buried depth, and is carried out an acceptance inspection to slot；
Step 4: when ground-connecting-wall grooving, grooving width of wall body being expanded at least using churning driven close to interlocking pile element stake side
200mm, it is ensured that when casting concrete, concrete can combine closely around the channel steel back side is flowed through with interlocking pile element stake, keep interlocking pile plain
It is connected firmly between stake and ground-connecting-wall；
Step 5: being bored using churning driven except interlocking pile element stake at Partial seams, make ground-connecting-wall and adjacent interlocking pile element stake at least
There is 300mm occlusion, pays attention to control mud balance in 1.1g/cm in work progress3~1.25g/cm3, until the elevation of wall bottom；
Step 6: clear bottom, borehole cleaning operation are carried out after grooving, direct circulation borehole cleaning work can be used using fishing method, borehole cleaning is grabbed in clear bottom
Industry stops clear bottom after the completion of the mud displacement in slot；
Step 7: after grooving, clearing up adjacent interlocking pile element stake side wall repeatedly using wire brush, it is ensured that side wall not foundry loam, it is ensured that
It is completely embedded with ground-connecting-wall, is up and down reciprocatingly scrubbed no less than 20 times using brush wall device, brushed after wall in time by the mud on brush wall device
Skin cleans up, and checks steel wire situation, such as lossy timely repairing；
Step 8: carrying out the production of steel reinforcement cage, first derust to reinforcing bar before production, reinforcing bar is made using mould method moulding process
Cage, strict control welding quality when welding, determines fabrication of reinforcing cage width according to interlocking pile element stake position；
Step 9: burying two steel floral tubes between ground-connecting-wall wall and adjacent interlocking pile element stake, welded between two steel floral tubes
With on the steel reinforcement cage of interlocking pile element stake side, two steel floral tube parallel arrangements are buried to ground-connecting-wall wall bottom design height for binding after connecing,
Ejection for water plugging reinforcement is carried out convenient for casting concrete, Grouting Pipe position should be appropriate at seam channel steel；
Step 10: carrying out the lifting of steel reinforcement cage, when lifting controls this section of steel reinforcement cage channel steel position and stings as close as possible to pile
The stake of stake element is closed, the gap between reduction, it is firm to make to connect between ground-connecting-wall and interlocking pile element stake；
Step 11: pouring this section of walls concrete, pay attention to ensuring Underwater Concrete preferable mobility when pouring, it is ensured that concrete wall
Quality, opening needs to guarantee concrete continuous casting after pouring, and in joint area casting, Grouting Pipe is made to do 30cm up and down motion, it is ensured that
Pouring quality；
Step 12: set double rows slip casting pipe on the outside of the seam of ground-connecting-wall and the stake of interlocking pile element, the quantity of Grouting Pipe and
Away from determining according to concrete engineering geological hydrology condition, mortar depositing construction is carried out, guarantees that the joint seal is reinforced；
Step 13: after ground-connecting-wall construction is completed 3 days, pre-buried steel floral tube being filled the water, to guarantee the unimpeded of grouting pipeline
And the splitting of loop pipe, it is ready for cement injection, when water filling, pays attention to the output of the down position and mudjack of the water surface at any time
Pressure 0.5MPa~0.7MPa, pressure water should not be also unsuitable very little too much, and the water filling dredging post-infusion cement slurry of steel floral tube 5 is reinforced, it is ensured that
Seam crossing sealing quality.
Step 14: being reinforced in the stake of interlocking pile element and ground-connecting-wall outside using double rotary churning pile, the diameter and number of rotary churning pile
Amount is determined according to concrete engineering geological hydrology condition, is at least engaged 200mm between rotary churning pile stake, unwrapping wire avoided when positioning interlocking pile with
Inbuilt double rows slip casting on the outside of ground-connecting-wall connector uses mud off rotary drilling when drilling, maintains hole wall to stablize, at least uses
The ordinary portland cement of label 42.5, reinforcement depth are ground to underground continuous wall bottom designed elevation；
Step 15: if percolation phenomenon occurs in later period seam, metope being carried out to pick chisel cleaning, is then carried out with double-quick cement
It blocks；Chisel cleaning leakage point is picked when serious, is inserted into diversion pipe, is smeared plugging material (blocking spirit, quick-hardening cement etc.) and is blocked water conservancy diversion
Pipe finally carries out injecting treatment on the outside of building enclosure or below leakage point, supplement grouting and reinforcing, and percolating water, which blocks, completes rear
It can continue to excavate.
The injecting paste material of grouting of the present invention selects 425# sulfate-resistant cement (resisting sulfate attack), the ratio of mud
It is 0.5, the basalt fibre that 0.2% is added in slurries improves cracking resistance (fiber filament diameter 12=3um, density 2.65kg/
M3, average length 6mm, tensile strength 2000MPa, elasticity modulus 90GPa, limit elongation 3.5%).
The proportion (%) of retaining wall mud of the present invention is water: bentonite: carboxymethyl cellulose: barite=100: 10
: 0.3: 0.02, wherein liquid level absolute altitude is higher than level of ground water 1m in control flume；Mud balance controls between 1.05~1.15；Mud
Slurry viscosity is controlled in 20~22s；Mud PH value is no more than 10.5, has the function of floating outstanding boring mud, cooling drill bit, lubrication drilling tool,
Hydrostatic pressure can be increased, and form mudcake in cell wall, seepage flow inside and outside partition grooves prevents retaining wall anti-collapse.
The main structure of interlocking pile of the present invention and ground-connecting-wall seam crossing water sealing structure includes ground-connecting-wall, interlocking pile element
Stake, Yao He Zhuan Quan, rotary churning pile, steel floral tube and Grouting Pipe；Yao He Zhuan Quan are alternatively arranged with interlocking pile element stake, are mutually twisted shape
At interlocking pile, ground-connecting-wall is engaged with adjacent interlocking pile element stake, and diaphram wall buried depth is identical as adjacent interlocking pile element stake buried depth；Steel
Floral tube is welded on ground-connecting-wall and the steel reinforcement cage of adjacent interlocking pile element stake sides adjacent, and buried depth is identical as ground-connecting-wall buried depth；Grouting Pipe
It is embedded on the outside of the stake of interlocking pile element and ground-connecting-wall seam crossing, buried depth is determined according to concrete engineering geological conditions；Rotary churning pile, which is located at, to be stung
It closes on the outside of the stake of stake element and ground-connecting-wall seam crossing, buried depth is identical as ground-connecting-wall buried depth.
Thickness, breadth and the buried depth of ground-connecting-wall of the present invention are true according to the size of concrete engineering geological condition and interlocking pile
Fixed, diaphram wall breadth is not more than 6m, and buried depth is 10m to 50m, with a thickness of 0.5m to 1.2m, and is less than adjacent interlocking pile element
Stake diameter at least 200mm, so that the two closely connects；The diameter and buried depth of interlocking pile element stake are determining according to engineering geological condition,
Diameter is not less than 1000mm, is at least poured with C25 ultra-retardation concrete, is engaged between adjacent studs stake not less than 300mm；Interlocking pile
Quan diameters and buried depth should determine that diameter is not less than 1000mm, at least with the underwater coagulation coagulation of C45 according to engineering geological condition
Soil pours, and is engaged between adjacent studs stake not less than 300mm；The diameter of rotary churning pile is identical as interlocking pile diameter, at least uses label
42.5 ordinary portland cement, tangent with Yao He Zhuan Quan, the stake of interlocking pile element, ground-connecting-wall stake, reinforcement depth is ground to stinging
Close stake stake bottom absolute altitude；The diameter of steel floral tube is determined according to concrete engineering geological condition, is generally used A42 steel floral tube, is adopted between steel pipe
With welded connecting；Diameter, the buried depth of Grouting Pipe should should be determined according to concrete engineering geological condition, and screwed connection is used between steel pipe.
Compared with prior art, the present invention providing a row for interlocking pile and diaphram wall seam crossing sealing problem
Effective seam crossing water sealing structure and method, be engaged by ground-connecting-wall with adjacent pile body, buried between ground-connecting-wall wall and interlocking pile
If steel floral tube, is set on the outside of ground-connecting-wall and interlocking pile seam and carry out whirl spraying on the outside of double rows slip casting pipe and interlocking pile and ground-connecting-wall
A series of structures and the measures such as stake reinforcing, solve the problems, such as interlocking pile and diaphram wall seam crossing sealing, improve seam crossing
Waterproof and leakage resistance energy enhance the stability and safety of foundation pit.
Detailed description of the invention:
Fig. 1 is the integral planar schematic diagram of interlocking pile and diaphram wall seam crossing water sealing structure in the present invention.
Fig. 2 is the 1-1 sectional view of interlocking pile and diaphram wall seam crossing water sealing structure in the present invention, wherein 1 is underground
Diaphragm wall, 2 be the stake of interlocking pile element, and 3 be the stake of interlocking pile meat or fish, and 4 be rotary churning pile, and 5 be steel floral tube, and 6 be Grouting Pipe, and H1 is ground to ground
Even wall wall bottom depth, H2 are Grouting Pipe buried depth.
Specific embodiment:
The present invention is described in further details below by specific example and in conjunction with attached drawing.But this should not be interpreted as to this
The range for inventing above-mentioned theme is only limitted to example below, it is all belonged to based on the technology that the content of present invention is realized it is of the invention
Range.
Embodiment 1:
The main structure of interlocking pile described in the present embodiment and ground-connecting-wall seam crossing water sealing structure includes ground-connecting-wall 1, interlocking pile
Plain stake 2, Yao He Zhuan Quan stake 3, rotary churning pile 4, steel floral tube 5 and Grouting Pipe 6；Yao He Zhuan Quan stake 3 is alternatively arranged with interlocking pile element stake 2,
It is mutually twisted to form interlocking pile, ground-connecting-wall 1 is engaged with adjacent interlocking pile element stake 2,1 buried depth of diaphram wall and adjacent interlocking pile element
2 buried depths of stake are identical；Steel floral tube 5 is welded on ground-connecting-wall 1 and the steel reinforcement cage of adjacent 2 sides adjacent of interlocking pile element stake, and buried depth and ground are even
1 buried depth of wall is identical；Grouting Pipe 6 is embedded on the outside of interlocking pile element stake 2 and 1 seam crossing of ground-connecting-wall, and buried depth is according to concrete engineering geology
Condition determines；Rotary churning pile 4 is located on the outside of interlocking pile element stake 2 and 1 seam crossing of ground-connecting-wall, and buried depth is identical as 1 buried depth of ground-connecting-wall.
The thickness of ground-connecting-wall 1, breadth and buried depth described in the present embodiment are according to the ruler of concrete engineering geological condition and interlocking pile
Very little determination, diaphram wall breadth are not more than 6m, and buried depth is 10m to 50m, with a thickness of 0.5m to 1.2m, and are less than adjacent occlusion
The plain stake 2 diameter at least 200mm of stake, so that the two closely connects；The diameter and buried depth of interlocking pile element stake 2 are according to engineering geological condition
It determines, diameter is not less than 1000mm, is at least poured with C25 ultra-retardation concrete, is engaged between adjacent studs stake not less than 300mm；
The diameter and buried depth of Yao He Zhuan Quan stake 3 should determine that diameter is not less than 1000mm, at least underwater with C45 according to engineering geological condition
Coagulation concreting is engaged not less than 300mm between adjacent studs stake；The diameter of rotary churning pile 4 is identical as interlocking pile diameter, at least
With the ordinary portland cement of label 42.5, with Yao He Zhuan Quan stake 3, interlocking pile element stake 2, ground-connecting-wall 1 it is tangent, reinforcement depth is
Ground to interlocking pile stake bottom absolute altitude；The diameter of steel floral tube 5 is determined according to concrete engineering geological condition, generally uses A42 steel floral tube,
Using welded connecting between steel pipe；Diameter, the buried depth of Grouting Pipe 6 should should be determined according to concrete engineering geological condition, be used between steel pipe
Screwed connection.
Embodiment 2:
Interlocking pile described in embodiment 1 is engaged with ground-connecting-wall seam crossing water sealing structure using Mr. Yu mouthful subway station by the present embodiment
The main structure of stake and diaphram wall seam crossing, the interlocking pile and ground-connecting-wall seam crossing water sealing structure includes ground-connecting-wall 1, wall
Thick 800mm, breadth 6.0m, buried depth 26m, using C45 underwater concreting；Interlocking pile element stake 2, diameter 1000mm are and adjacent
Stake pilespacing 700mm, is engaged 300mm, and buried depth 26m is poured using C25 ultra-retardation concrete；Yao He Zhuan Quan stake 3, diameter 1000mm,
With adjacent studs pilespacing 700mm, it is engaged 300mm, buried depth 26m, using C45 underwater concreting；Rotary churning pile 4, diameter 1000mm,
Buried depth 26m is mutually twisted 300mm between rotary churning pile 4, tangent with ground-connecting-wall 1, interlocking pile element stake 2, Yao He Zhuan Quan stake 3, uses label
42.5 ordinary portland cement pours；The A42 steel floral tube of steel floral tube 5, thickness of pipe wall 3mm, tube wall surrounding are 8mm mud jacking hole, steel
Using welding, buried depth 26m between floral tube；The A42 Grouting Pipe of Grouting Pipe 6, thickness of pipe wall 3mm, tube wall surrounding are 8mm mud jacking hole, slip casting
Screwed connection, buried depth 26m are used between pipe；Interlocking pile element stake 2 and 3 spacing 700mm of Yao He Zhuan Quan stake are engaged 300mm, interlocking pile
Plain stake 2 is adjacent with ground-connecting-wall 1, convenient for being engaged with ground-connecting-wall 1；Steel by two bindings of A42 steel floral tube 5 in 1 seam side of ground-connecting-wall
On muscle cage, buried depth 26m.It carries out ground-connecting-wall 1 to construct, makes to be engaged 200mm between ground-connecting-wall 1 and adjacent interlocking pile element stake；In ground-connecting-wall 1
With set double A42 Grouting Pipe 6 on the outside of interlocking pile, spacing 1m, totally 8, buried depth 12m；It is added on the outside of ground-connecting-wall 1 and interlocking pile
Double rotary churning pile 4 totally 9, diameter 1000mm, 300mm is mutually twisted between rotary churning pile 4, totally 9, with ground-connecting-wall 1, interlocking pile element stake
2, interlocking pile meat or fish stake 3 is tangent.
The specific implementation method of the present embodiment are as follows:
Step 1: using 1000@700mm casing bitten pile of Φ, when carrying out the construction of interlocking pile, adjacent with ground-connecting-wall 1 is stung
Closing stake is plain stake 2, convenient for being engaged between ground-connecting-wall 1 and adjacent interlocking pile element stake 2；After unwrapping wire positioning, drilling machine is in place, and soil taking hole forming is straight
To design bottom hole absolute altitude, for example Yao He Zhuan Quan hang steel reinforcement cage, after-pouring concrete tube drawing pile after pore-forming passed examination；
Step 2: the preparation of ground-connecting-wall grooving carries out unwrapping wire positioning and the construction of guide wall of ground-connecting-wall 1, prepares mud,
Then grooving is tried, tries grooving Specific construction process with normal trenching construction；
Step 3: ground-connecting-wall routine grooving according to design drawing and leads wall and determines 1 position of ground-connecting-wall, and chute forming machine is excavated
Operation, uses the 480 type hydraulic grab bucket grooving machine grooving of Xu work in this example, and when grooving uses mud off, until depth with it is adjacent
Interlocking pile buried depth is identical, then carries out slot examination；
Step 4: when 1 grooving of ground-connecting-wall, grooving width of wall body being expanded extremely using churning driven close to 2 side of interlocking pile element stake
1000mm, it is ensured that when casting concrete, concrete can combine closely with interlocking pile element stake 2 around the channel steel back side is flowed through, make interlocking pile
Connection between plain stake 2 and ground-connecting-wall 1 is stronger；
Step 5: being bored using churning driven except interlocking pile element stake 2 at Partial seams, make ground-connecting-wall 1 and adjacent interlocking pile element stake 2
At least 300mm occlusion pays attention to control mud balance in 1.1g/cm in the process3~1.25g/cm3, it is ensured that hole wall not collapse hole, directly
Until the elevation of wall bottom, the mud makees raw material using bentonite, soda ash, CMC, barite, leak preventive and tap water, and raw material is matched
It secondary mix is mixed forms than being mixed and stirred by clean plasm punching for 100:4:1:1:2:1000；
Step 6: clear bottom, borehole cleaning operation are carried out after 1 grooving of ground-connecting-wall, this example fishes out the clear bottom of method using churning driven.Fishing is grabbed
After the completion, borehole cleaning operation is carried out using direct circulation, guarantees that slot bottom sediment is not more than 50mm, borehole cleaning pit bottom slurry specific gravity is not more than
1.15；
Step 7: after grooving, clearing up adjacent 2 side wall of finished peg element stake repeatedly using wire brush, it is ensured that side wall not foundry loam, really
It protects between wall and is completely embedded, up and down reciprocatingly scrubbed no less than 20 times, brushed after wall in time by the mud on brush wall device using brush wall device
Skin cleans up, and checks steel wire situation, should repair in time Ru lossy；.
Step 8: the production of steel reinforcement cage is carried out, first reinforcing bar derusting, makes steel reinforcement cage using mould method moulding process before making,
Strict control welding quality when welding should determine fabrication of reinforcing cage width according to 2 position of interlocking pile element stake and diameter, even convenient for ground
Wall 1 is engaged with adjacent interlocking pile 2；
Step 9: 2 steel floral tubes 5 are buried between ground-connecting-wall wall 1 and adjacent interlocking pile element stake 2, between two steel floral tubes 5
It with welded connecting, binds on the steel reinforcement cage of seam side, two steel floral tubes 5 are arranged in parallel, and spacing 400mm is buried to ground-connecting-wall wall
Bottom design height carries out ejection for water plugging reinforcement convenient for concrete placings, and catheter position should be appropriate close to seam channel steel；
Step 10: carrying out reinforcing bar cage hoisting, when lifting controls this section of steel reinforcement cage channel steel position and is engaged as close as possible to pile
Stake pile body 2, gap between reduction are connected firmly between ground-connecting-wall 1 and adjacent interlocking pile element stake 2 after making casting concrete；
Step 11: using this section of walls concrete of C45 underwater concreting, pay attention to ensuring that Underwater Concrete is preferable when pouring
Mobility, it is ensured that concrete wall quality, opening needs to guarantee concrete continuous casting after pouring, and in joint area casting, makees conduit
30cm moves up and down, it is ensured that pouring quality；
Step 12: setting double rows slip casting pipe 6 on the outside of seam, carry out mortar depositing construction, guarantee that the joint seal is reinforced, ground connects
After the completion of 1 concreting of wall, double A42 Grouting Pipe is set on the outside of interlocking pile element stake 2 and 1 seam of ground-connecting-wall, spacing 1m is total
8, screwed connection, pipe thickness 3mm are used between steel pipe, this engineering reinforcement depth protrudes into farinose argillic horizon to subsurface 12m
1m；Using drilling machine in the outside pore-forming of ground-connecting-wall and interlocking pile seam, then manually Grouting Pipe is vertically squeezed into pore-forming；
When carrying out slip casting operation, in 2~4Mpa, preparing cement used in slurries is 42.5 normal silicate water of label for grouting pressure control
Mud first uses weight ratio for two holes of cement slurry injection test of 1:1, and such as property infused is preferable, adjusts the ratio of the ratio of mud to 0.5~0.6
Example；
Step 13: after the construction of ground-connecting-wall 1 is completed 3 days, pre-buried steel floral tube 5 being filled the water, to guarantee the smooth of grouting pipeline
Logical and loop pipe splitting when water filling, pays attention to the down position and mudjack of the water surface to be ready with post-infusion cement slurry at any time
Output pressure, pressure water should not be also unsuitable very little too much, with the grouting pump slip casting with pressure gauge, slurries label 42.5 after dredging
Ordinary portland cement prepare, grouting pressure be 2~4Mpa, first use weight ratio for two holes of cement slurry injection test of 1:1, sky
The larger ratio that then can adjust the ratio of mud to 0.5~0.6 of gap；
Step 14: being reinforced in interlocking pile element stake 2 and 1 outside of ground-connecting-wall using double rotary churning pile 4, rotary churning pile in this example
4 set 9 altogether, and 300mm is engaged between stake, and unwrapping wire avoids inbuilt double rows slip casting pipe on the outside of interlocking pile and ground-connecting-wall connector when positioning,
Mud off rotary drilling is used when drilling, maintains hole wall to stablize, using the ordinary portland cement of label 42.5, reinforcement depth
For ground to 1 wall bottom designed elevation of diaphram wall；
Step 15: if percolation phenomenon occurs in later period seam, metope can be carried out picking chisel cleaning, then use double-quick cement
It is blocked；Chisel cleaning leakage point is picked when serious, is inserted into diversion pipe, is smeared plugging material (blocking spirit, quick-hardening cement etc.), is blocked
Diversion pipe finally carries out injecting treatment on the outside of building enclosure or below leakage point, supplement grouting and reinforcing, and percolating water, which blocks, to be completed
After continue to excavate.
The injecting paste material of grouting described in the present embodiment selects 425# sulfate-resistant cement (resisting sulfate attack), water ash
The basalt fibre that 0.2% is added than being 0.5, in slurries improves cracking resistance (fiber filament diameter 12=3um, density
2.65kg/m3, average length 6mm, tensile strength 2000MPa, elasticity modulus 90GPa, limit elongation 3.5%).
The proportion (%) of retaining wall mud described in the present embodiment is water: bentonite: carboxymethyl cellulose: barite=100:
10: 0.3: 0.02, wherein liquid level absolute altitude is higher than level of ground water 1m in control flume；Mud balance controls between 1.05~1.15；
Mud viscosity is controlled in 20~22s；Mud PH value is no more than 10.5, has floating outstanding boring mud, cooling drill bit, the work for lubricating drilling tool
With hydrostatic pressure can be increased, and form mudcake in cell wall, and seepage flow inside and outside partition grooves prevents retaining wall anti-collapse.
Claims (3)
1. a kind of interlocking pile and ground-connecting-wall seam crossing water-stopping method, it is characterised in that pass through interlocking pile and ground-connecting-wall seam crossing sealing
Structure realization, detailed process are as follows:
Step 1: carrying out the construction of interlocking pile, being engaged with ground-connecting-wall is interlocking pile element stake, and after unwrapping wire positioning, drilling machine is in place, takes
For native pore-forming until design bottom hole absolute altitude, for example Yao He Zhuan Quan hang steel reinforcement cage, after-pouring concrete after pore-forming passed examination
Tube drawing pile；
Step 2: the preparation of ground-connecting-wall construction positions construction of guide wall, preparation using the unwrapping wire that prior art carries out ground-connecting-wall
Then mud tries grooving；
Step 3: ground-connecting-wall routine grooving according to design requirement and leads the position that wall determines ground-connecting-wall, and chute forming machine carries out excavation work
Industry uses mud off when grooving, until depth is identical as adjacent interlocking pile buried depth, and carries out an acceptance inspection to slot；
Step 4: when ground-connecting-wall grooving, grooving width of wall body at least 200mm is expanded using churning driven close to interlocking pile element stake side,
When ensuring casting concrete, concrete can combine closely around the channel steel back side is flowed through with interlocking pile element stake, make the stake of interlocking pile element and ground
Even it is connected firmly between wall；
Step 5: being bored using churning driven except interlocking pile element stake at Partial seams, make ground-connecting-wall and adjacent interlocking pile element stake at least
300mm is engaged, and pays attention to control mud balance in 1.1g/cm in work progress3~1.25g/cm3, until the elevation of wall bottom；
Step 6: clear bottom, borehole cleaning operation are carried out after grooving, using fishing method is grabbed, direct circulation borehole cleaning operation is can be used in borehole cleaning at clear bottom, to
Stop clear bottom after the completion of mud displacement in slot；
Step 7: after grooving, clearing up adjacent interlocking pile element stake side wall repeatedly using wire brush, it is ensured that side wall not foundry loam, it is ensured that with ground
Even wall is completely embedded, and is up and down reciprocatingly scrubbed no less than 20 times using brush wall device, has been brushed in time that the mudcake on brush wall device is clear after wall
Wash clean, and check steel wire situation, such as lossy timely repairing；
Step 8: carrying out the production of steel reinforcement cage, first derust to reinforcing bar before production, steel reinforcement cage, weldering are made using mould method moulding process
Strict control welding quality when connecing determines fabrication of reinforcing cage width according to interlocking pile element stake position；
Step 9: two steel floral tubes are buried between ground-connecting-wall wall and adjacent interlocking pile element stake, after welding between two steel floral tubes
With on the steel reinforcement cage of interlocking pile element stake side, two steel floral tube parallel arrangements are buried to ground-connecting-wall wall bottom design height, are convenient for for binding
Casting concrete carries out ejection for water plugging reinforcement, and Grouting Pipe position should be appropriate at seam channel steel；
Step 10: carrying out the lifting of steel reinforcement cage, when lifting controls this section of steel reinforcement cage channel steel position as close as possible to pile interlocking pile
Plain stake, the gap between reduction, it is firm to make to connect between ground-connecting-wall and interlocking pile element stake；
Step 11: pouring this section of walls concrete, pay attention to ensuring Underwater Concrete preferable mobility when pouring, it is ensured that concrete wall matter
Amount, opening needs to guarantee concrete continuous casting after pouring, and in joint area casting, so that Grouting Pipe is done 30cm up and down motion, it is ensured that pour
Build quality；
Step 12: double rows slip casting pipe, the quantity and spacing root of Grouting Pipe are set on the outside of ground-connecting-wall and the seam of interlocking pile element stake
It is determined according to concrete engineering geological hydrology condition, carries out mortar depositing construction, guarantee that the joint seal is reinforced；
Step 13: after ground-connecting-wall construction is completed 3 days, pre-buried steel floral tube being filled the water, to guarantee the unimpeded and ring of grouting pipeline
The splitting of shape pipe, is ready for cement injection, when water filling, pays attention to the down position of the water surface and the output pressure of mudjack at any time
The MPa of 0.5 MPa~0.7, pressure water should not be also unsuitable very little too much, and the water filling dredging post-infusion cement slurry of steel floral tube 5 is reinforced, it is ensured that is connect
Sealing quality at seam.
Step 14: being reinforced in the stake of interlocking pile element and ground-connecting-wall outside using double rotary churning pile, the diameter and quantity root of rotary churning pile
It is determined according to concrete engineering geological hydrology condition, 200mm is at least engaged between rotary churning pile stake, and unwrapping wire avoids interlocking pile and ground even when positioning
Inbuilt double rows slip casting on the outside of wall joint uses mud off rotary drilling when drilling, and hole wall is maintained to stablize, and at least uses label
42.5 ordinary portland cement, reinforcement depth are ground to underground continuous wall bottom designed elevation；
Step 15: if percolation phenomenon occurs in later period seam, metope being carried out to pick chisel cleaning, is then sealed with double-quick cement
It is stifled；Chisel cleaning leakage point is picked when serious, is inserted into diversion pipe, is smeared plugging material and is blocked diversion pipe, finally on the outside of building enclosure
Or injecting treatment is carried out below leakage point, grouting and reinforcing is supplemented, percolating water can continue to excavate after the completion of blocking.
2. interlocking pile and ground-connecting-wall seam crossing water-stopping method according to claim 1, it is characterised in that the interlocking pile and ground
Even wall seam crossing water sealing structure main structure include ground-connecting-wall, the stake of interlocking pile element, Yao He Zhuan Quan, rotary churning pile, steel floral tube and
Grouting Pipe；Yao He Zhuan Quan are alternatively arranged with interlocking pile element stake, are mutually twisted to form interlocking pile, ground-connecting-wall and adjacent interlocking pile element
Stake occlusion, diaphram wall buried depth are identical as adjacent interlocking pile element stake buried depth；Steel floral tube is welded on ground-connecting-wall and adjacent interlocking pile
On the steel reinforcement cage of plain stake sides adjacent, buried depth is identical as ground-connecting-wall buried depth；Grouting Pipe is embedded in the stake of interlocking pile element and ground-connecting-wall seam
Place outside, buried depth are determined according to concrete engineering geological conditions；Rotary churning pile is located on the outside of the stake of interlocking pile element and ground-connecting-wall seam crossing, is buried
It is deep identical as ground-connecting-wall buried depth.
3. interlocking pile and ground-connecting-wall seam crossing water-stopping method according to claim 2, it is characterised in that the thickness of the ground-connecting-wall
Degree, breadth and buried depth determine that diaphram wall breadth is not more than 6m according to the size of concrete engineering geological condition and interlocking pile, bury
Depth is 10m to 50m, with a thickness of 0.5m to 1.2m, and is less than adjacent interlocking pile element stake diameter at least 200mm, so that the two is close
Connection；The diameter and buried depth of interlocking pile element stake determine that diameter is not less than 1000mm according to engineering geological condition, at least super with C25
Retarded concrete pours, and is engaged between adjacent studs stake not less than 300mm；The diameter and buried depth of Yao He Zhuan Quan should according to engineering
Matter condition determines that diameter is engaged not small not less than 1000mm at least with the underwater coagulation concreting of C45 between adjacent studs stake
In 300mm；The diameter of rotary churning pile is identical as interlocking pile diameter, the ordinary portland cement of label 42.5 is at least used, with interlocking pile
Quan, the stake of interlocking pile element, ground-connecting-wall stake it is tangent, reinforcement depth is ground to interlocking pile stake bottom absolute altitude；The diameter of steel floral tube according to
Concrete engineering geological condition determines, generally uses A42 steel floral tube, uses and be welded to connect between steel pipe；Diameter, the buried depth of Grouting Pipe are answered
It should be determined according to concrete engineering geological condition, screwed connection is used between steel pipe.
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| CN201910669418.4A CN110409511B (en) | 2019-07-24 | 2019-07-24 | Water stopping method for joint of secant pile and diaphragm wall |
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| CN112962578A (en) * | 2021-02-03 | 2021-06-15 | 上海兴庚基础工程有限公司 | Construction process of underground diaphragm wall |
| CN114718071A (en) * | 2021-12-30 | 2022-07-08 | 中铁十四局集团有限公司 | Plugging method suitable for junction of secant pile and continuous wall |
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| CN110409511B (en) | 2021-10-08 |
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