CN110485431A - A kind of interlocking pile combines foundation pit supporting construction with ground-connecting-wall - Google Patents
A kind of interlocking pile combines foundation pit supporting construction with ground-connecting-wall Download PDFInfo
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- CN110485431A CN110485431A CN201910669491.1A CN201910669491A CN110485431A CN 110485431 A CN110485431 A CN 110485431A CN 201910669491 A CN201910669491 A CN 201910669491A CN 110485431 A CN110485431 A CN 110485431A
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 239000004567 concrete Substances 0.000 claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 14
- 230000002787 reinforcement Effects 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 13
- 239000004570 mortar (masonry) Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000011378 shotcrete Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000009739 binding Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 241000251468 Actinopterygii Species 0.000 claims description 2
- 241000357293 Leptobrama muelleri Species 0.000 claims description 2
- 235000013372 meat Nutrition 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 238000012797 qualification Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 208000002193 Pain Diseases 0.000 abstract 1
- 238000009412 basement excavation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012546 transfer 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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- 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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- 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
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
Abstract
The invention belongs to Base hole supporting technology field, it is related to a kind of interlocking pile and combines foundation pit supporting construction with ground-connecting-wall, the stake of interlocking pile element is engaged pile body with stinging to close stake Quan and be engaged to be formed；Interlocking pile and external wall structure are connected to form smooth metope；Crown beam is poured respectively in ground-connecting-wall and interlocking pile top；First of support is reinforced concrete support, is connected with the reserved steel bar in crown beam, according to foundation pit shape and loading characteristic using armored concrete angle brace, armored concrete to support, armored concrete diagonal brace；Purlin is installed by designed elevation on ground-connecting-wall and external wall structure；The support of second and third road is the bracing members of Two bors d's oeuveres structure, and bracing members are connected with purlin, interlocking pile is combined with ground-connecting-wall, the advantages of both making full use of, and the shortcomings that both can overcome, good water-proof effect, flexibly, impermeability is strong, is with a wide range of applications and good economic benefits for construction.
Description
Technical field:
The invention belongs to Base hole supporting technology fields, and in particular to a kind of interlocking pile combines pattern foundation pit supporting structure knot with ground-connecting-wall
Structure.
Background technique:
With the raising of China's economic level, traffic pressure is increasing, and deep-foundation pit engineering rises therewith.Since ground is iron-based
Hole depth is big and Adjacent Buildings are more, complicated hydrogeological conditions, also higher and higher to the safety requirements of pattern foundation pit supporting structure.
Currently used deep foundation pit support form has diaphram wall, interlocking pile, and not only support form has differences, excellent
Point disadvantage is also different.Diaphram wall is that foundation engineering uses a kind of trench machine on the ground, along deep excavation project
Periphery axis, slot under the conditions of mud off, steel reinforcement cage hung in slot, then underwater concreting with tremie method builds up a list
First slot section, constructs paragraph by paragraph, builds up continuous armored concrete wall together in underground, as intercept water, antiseepage, load-bearing, gear
Water-bound, speed is fast, with small vibration when construction of diaphragm wall, and low noise is relatively suitble in municipal construction.Ground-connecting-wall wall stiffness
Greatly, after excavation of foundation pit can bearing capacity it is strong, stability is high.Wall barrier performance itself is good, is suitable for level of ground water height, head pressure
The big base pit engineering of power；Interlocking pile is that part-circular periphery is engaged between adjacent concrete campshed, and in hanging in reinforcing bar in Yao He Zhuan Quan
Cage forms the whole continuous waterproof, earth-retaining building enclosure with good barrier effect, and the interlocking pile ratio of reinforcement is lower, reduces supporting
The ratio of reinforcement of structure.There is no cold seams of constructing to be mingled with soil for interlocking pile intercolumniation, and globality is strong, and impermeability is strong.It is engaged pile driving construction
When it is flexible, can transfer according to need, be more suitable for the changeable pattern foundation pit supporting structure of some planes of constructing.
In foundation pit supporting project, interlocking pile, which combines foundation pit supporting construction with ground-connecting-wall, can make full use of the excellent of the two
Point, and the shortcomings that both can overcome, it is with a wide range of applications and good economic benefits.Therefore, design it is a kind of rationally, can
It is extremely urgent that the interlocking pile leaned on ground-connecting-wall combines foundation pit supporting construction.
Summary of the invention:
It is an object of the invention to overcome disadvantage of the existing technology, design provides a kind of interlocking pile and combines with ground-connecting-wall
Foundation pit supporting construction enhances the stability and safety of supporting construction.
To achieve the goals above, the main structure of interlocking pile of the present invention and ground-connecting-wall combined retaining structure includes ground
Even wall, the stake of interlocking pile element, crown beam, reinforced concrete support, bracing members, external wall structure, purlin and Yao He Zhuan Quan；According to difference
Engineering geological condition, technical requirements, select ground-connecting-wall or interlocking pile as main body supporting construction, the stake of interlocking pile element and interlocking pile
Quan occlusions form occlusion pile body；In ground-connecting-wall and interlocking pile seam crossing, the interlocking pile adjacent with ground-connecting-wall is the stake of interlocking pile element,
The two occlusion is connected；Interlocking pile is connected with external wall structure, forms smooth metope；Hat is poured respectively in ground-connecting-wall and interlocking pile top
Beam；First of support is reinforced concrete support, is connected with the reserved steel bar in crown beam, is made according to foundation pit shape and loading characteristic
With armored concrete angle brace, armored concrete to support, armored concrete diagonal brace；Designed elevation is pressed on ground-connecting-wall and external wall structure
Purlin 7 is installed；The support of second and third road is the bracing members of Two bors d's oeuveres structure, and bracing members are connected with purlin, according to foundation pit shape and stress
Feature to support, bracing members diagonal brace and takes reinforcement measure using bracing members angle brace, bracing members.
The specific size of diaphram wall of the present invention according to the size of concrete engineering and interlocking pile determine, generally under
Diaphragm wall breadth is not more than 6m, and buried depth is 10m to 50m, with a thickness of 0.5m to 1.2m, is less than adjacent interlocking pile element stake diameter at least
200mm, it is close convenient for the two occlusion；The diameter and buried depth of interlocking pile element stake should determine that diameter is not less than according to concrete engineering
1000mm is at least poured with C25 ultra-retardation concrete, is engaged between adjacent studs stake not less than 300mm；The diameter of Yao He Zhuan Quan
It is determined with buried depth according to concrete engineering, diameter is not less than 1000mm, at least with the underwater coagulation concreting of C45, with adjacent studs
Occlusion is not less than 300mm between stake；The size of crown beam is 1200 × 1000mm, 1500 × 1000mm, is at least poured with C45 concrete
It builds；The type of reinforced concrete support, length, cross-sectional area are determined as 800 × 1000mm according to foundation pit size and specific load,
At least use C45 concreting.
External wall structure of the present invention includes in-network processing layer, mortar levelling layer, construction waterproof layer, side wall, is being engaged
M esh-hanging sprayed concrete forms in-network processing layer on the anchor bar of stake inside, and thickness is not less than 80mm, in-network processing layer
Outside is the mortar levelling layer that thickness is not less than 20mm, and construction waterproof layer on the outside of mortar levelling layer pours side on the outside of waterproof layer
Wall, thickness are not less than 20mm.
Purlin of the present invention generally uses Q235B steel using combination Two bors d's oeuveres I-steel, and purlin is erected at triangular supports
On, triangular supports are connected using the YG2 type tube expansion bolt of diameter 20mm with ground-connecting-wall, and connection length is not less than 280mm, are being set
Pre-buried Non-slip material in the purlin inside wall body of diagonal brace is set, for enhancing the resistant slide ability of purlin, Non-slip material is by steel plate and reinforcing bar
It is welded, the thickness of steel plate is not less than 20mm, and reinforcing bar is Ribbed Bar, and diameter is not less than 20mm.
The length of bracing members of the present invention, diameter, wall thickness should be determined according to foundation pit size and specific load, according to foundation pit
For shape using bracing members angle brace, bracing members to support, bracing members diagonal brace, the fastening member of bracing members is by the first circle of diameter 20mm
Steel hook, the second round steel suspension hook weld between bracing members, YG2 tube expansion bolt respectively, and the first round steel suspension hook, the second round steel suspension hook are equal
Bent to by plain bar U-shaped, length is not less than 50mm, and YG2 tube expansion bolt is embedded in above purlin at 800mm, round steel suspension hook
It is connect between YG2 tube expansion bolt with the round steel S type connector and fastening screw of diameter 20mm, when bracing members are diagonal brace, in steel
Welding shearing block, shears the size of block and material meets concrete engineering requirement between support and purlin.
The detailed process of interlocking pile of the present invention and ground-connecting-wall Support Method are as follows:
Step 1: carry out the construction of interlocking pile, pay attention to the interlocking pile adjacent with ground-connecting-wall for plain stake, in order to ground-connecting-wall with
Adjacent interlocking pile element stake occlusion, after unwrapping wire positioning, drilling machine is in place, and for soil taking hole forming until design bottom hole absolute altitude, meat or fish stake should be in pore-forming
Steel reinforcement cage, after-pouring concrete tube drawing pile are hung after passed examination.
Step 2: carrying out the construction of ground-connecting-wall, the unwrapping wire of ground-connecting-wall positions construction of guide wall, prepares mud, after grooving, hang
Steel reinforcement cage casting concrete forms ground-connecting-wall；
Step 3: the construction of ground-connecting-wall and interlocking pile seam crossing is carried out, when ground-connecting-wall grooving, close interlocking pile element stake side
Grooving width of wall body at least 200mm is expanded using churning driven, it is ensured that when casting concrete, concrete can be around flowing through the channel steel back side；
It is bored using churning driven except interlocking pile element stake at Partial seams, is engaged ground-connecting-wall with adjacent interlocking pile element stake at least 300mm, it is right
After interlocking pile element stake brush wall, steel reinforcement cage, casting concrete are hung；
Step 4: crown beam construction, first line setting, then assembling reinforcement are carried out in interlocking pile element stake top and ground-connecting-wall wall top,
Then support template, casting concrete form armored concrete crown beam, and the reserved reinforcing bar with armored concrete support connection, and ground connects
The crown beam of wall and interlocking pile element stake connecting place should pour integrally；
Step 5: in crown beam construction, first of reinforced concrete support of constructing applies bed course, reinforcement welding, binding, peace
Dress, template installation and reinforcing, casting concrete, curing concrete after demoulding when intensity to be supported reaches 75%, continue to dig downwards
Soil；
Step 6: carrying out piling wall and combine construction, construction part uses anchor bar m esh-hanging sprayed concrete shape in interlocking pile
At in-network processing layer, thickness is not less than 100mm, then mortar levelling layer is done on in-network processing layer, and thickness is not less than 20mm,
Then waterproof layer is done on screed-coat, last shotcrete layer forms side wall；
Step 7: purlin being installed by designed elevation, triangular supports are installed in purlin, with the YG2 type of two diameter 20mm
Tube expansion bolt fastening triangular supports, the gap between purlin and side wall are filled with C30 pea gravel concreten；Steel purlin is lifted to be close to
Wall, then YG2 tube expansion bolt is installed, the steel purlin at diagonal brace answers pre-buried antiskid part；
Step 8: bracing members integrally splice lifting to be installed using 10t gantry crane, and after bracing members installation is in place, every Pin support is used
Two 100t platform hydraulic jacks withstand on the classification of steel pipe support movable end pre-add and apply axle power, and are locked, after adding wedge block,
Remove the installation that jack completes bracing members；
Step 9: continuing first support after excavating and dig afterwards, set up third road bracing members in time；Measurement and positioning anchors triangle branch
Frame installs purlin, bracing members, applies prestressing force, after adding wedge block, removes the installation that jack completes bracing members.
Compared with prior art, the present invention the advantages of interlocking pile is combined with ground-connecting-wall, makes full use of the two, and energy gram
The shortcomings that both clothes, good water-proof effect, flexibly, impermeability is strong for construction, is with a wide range of applications and good economic effect
It answers.
Detailed description of the invention:
Fig. 1 connect plan view with diaphram wall for interlocking pile of the present invention.
Fig. 2 is on the inside of interlocking pile of the present invention into wall plan view.
Fig. 3 is the inner support elevation of interlocking pile of the present invention and Diaphragm Wall structure.
Fig. 4 is interlocking pile of the present invention and first of reinforced concrete support plan view of diaphram wall.
Fig. 5 is interlocking pile of the present invention and second and third road Two bors d's oeuveres reinforced bar support plan view of diaphram wall.
Fig. 6 is Two bors d's oeuveres bracing members of the present invention, purlin and wall connecting elevation.
Fig. 7 is Two bors d's oeuveres bracing members of the present invention, purlin and wall connecting plan view.
Fig. 8 is Two bors d's oeuveres steel diagonal brace, purlin and wall connecting elevation of the present invention.
Fig. 9 is Two bors d's oeuveres steel diagonal brace, purlin and wall connecting plan view of the present invention.
Figure 10 is pre-buried Non-slip material detail drawing of the present invention.
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 combined retaining structure includes ground-connecting-wall 1, interlocking pile element
Stake 2, crown beam 3, reinforced concrete support 4, bracing members 5, external wall structure 6, purlin 7 and Yao He Zhuan Quan stake 8；According to different engineerings
Geological conditions, technical requirements select ground-connecting-wall 1 or interlocking pile as main body supporting construction, interlocking pile element stake 2 and sting conjunction stake Quan
8 occlusions form occlusion pile body；In ground-connecting-wall 1 and interlocking pile seam crossing, the interlocking pile adjacent with ground-connecting-wall 1 is interlocking pile element stake 2,
The two occlusion is connected；Interlocking pile is connected with external wall structure 6, forms smooth metope；It is poured respectively in ground-connecting-wall 1 and interlocking pile top
Crown beam 3；First of support is reinforced concrete support 4, is connected with the reserved steel bar in crown beam 3, according to foundation pit shape and stress
Feature is using armored concrete angle brace, armored concrete to support, armored concrete diagonal brace；It is pressed on ground-connecting-wall 1 and external wall structure 6
Designed elevation installs purlin 7；The support of second and third road is the bracing members 5 of Two bors d's oeuveres structure, and bracing members 5 are connected with purlin 7, according to base
Hole shape and loading characteristic using bracing members angle brace, bracing members to support, bracing members diagonal brace and take reinforcement measure.
The specific size of diaphram wall 1 described in the present embodiment is determining according to the size of concrete engineering and interlocking pile, generally
Diaphram wall breadth is not more than 6m, and buried depth is 10m to 50m, and with a thickness of 0.5m to 1.2m, it is straight to be less than adjacent interlocking pile element stake 2
Diameter at least 200mm, it is close convenient for the two occlusion；The diameter and buried depth of interlocking pile element stake 2 should determine that diameter is not according to concrete engineering
It less than 1000mm, is at least poured, is engaged between adjacent studs stake not less than 300mm with C25 ultra-retardation concrete；Yao He Zhuan Quan stake 8
Diameter and buried depth determine that diameter is not less than 1000mm according to concrete engineering, at least with the underwater coagulation concreting of C45, with
Occlusion is not less than 300mm between adjacent studs stake；The size of crown beam 3 is 1200 × 1000mm, 1500 × 1000mm, is at least mixed with C45
Solidifying soil pours；The type of reinforced concrete support 4, length, cross-sectional area be determined as 800 according to foundation pit size and specific load ×
1000mm at least uses C45 concreting.
External wall structure 6 described in the present embodiment includes in-network processing layer 9, mortar levelling layer 10, construction waterproof layer 11, side wall
12, m esh-hanging sprayed concrete forms in-network processing layer 9 on anchor bar 13 on the inside of the interlocking pile, and thickness is not less than 80mm, net
Mortar levelling layer 10 of the outside of pneumatically placed concrete layer 9 for thickness not less than 20mm, 10 outside construction waterproof layer 11 of mortar levelling layer,
Side wall 12 is poured on the outside of waterproof layer 11, thickness is not less than 20mm.
Purlin 7 described in the present embodiment generally uses Q235B steel using combination Two bors d's oeuveres I-steel, and purlin 7 is erected at triangle
On bracket 23, triangular supports 23 are connected using the YG2 type tube expansion bolt 19 of diameter 20mm with ground-connecting-wall 1, and connection length is not small
In 280mm, the pre-buried Non-slip material 24 in the 7 inside wall body of purlin of setting diagonal brace is prevented for enhancing the resistant slide ability of purlin 7
Saddle 24 is welded by steel plate 29 and reinforcing bar 30, and the thickness of steel plate 29 is not less than 20mm, and reinforcing bar 30 is Ribbed Bar, and diameter is not
Less than 20mm.
The length of bracing members 5, diameter, wall thickness described in the present embodiment should be determining according to foundation pit size and specific load, according to
For foundation pit shape using bracing members angle brace, bracing members to support, bracing members diagonal brace, the fastening member of bracing members 5 is by diameter 20mm's
First round steel suspension hook 21, the second round steel suspension hook 22 weld between bracing members 5, YG2 tube expansion bolt 18 respectively, the first round steel suspension hook
21, the second round steel suspension hook 22 is bent to U-shaped by plain bar, and length is not less than 50mm, and YG2 tube expansion bolt 18 is embedded in purlin
At 7 top 800mm, between round steel suspension hook 21,22 and YG2 tube expansion bolt 18 with the round steel S type connector 26,27 of diameter 20mm and
Fastening screw 28 connects, and when bracing members 5 are diagonal brace, welding shearing block 25, shears the ruler of block 25 between bracing members 5 and purlin 7
It is very little to meet concrete engineering requirement with material.
Embodiment 2:
Supporting construction described in embodiment 1 is used for certain subway station interlocking pile and Diaphragm Wall by the present embodiment
In, the interlocking pile and ground-connecting-wall combined supporting main structure include diaphram wall 1, wall thickness 800mm, breadth 6.0m, buried depth
26m is connected between ground-connecting-wall 1 using H profile steel with C45 underwater concreting；Interlocking pile element stake 2, diameter 1000mm, with neighbour
Stake is engaged 300mm, and buried depth 26m is poured with C25 ultra-retardation concrete；Interlocking pile concrete-pile 8, diameter 1000mm are stung with adjacent stake
300mm, buried depth 26m are closed, using C45 underwater concreting；Crown beam 3, the crown beam 3 of ground-connecting-wall 1 having a size of 1200 × 1000mm,
The crown beam 3 of interlocking pile is having a size of 1500 × 1000mm；Concrete support 4, concrete support are supported as first, having a size of
800 × 1000mm is formed using C45 concreting；Bracing members 5 use Two bors d's oeuveres bracing members, and Two bors d's oeuveres bracing members use Φ
609mm, wall thickness t=16mm steel pipe；Purlin 7 uses the combined I-shaped steel of Two bors d's oeuveres I56c, and steel material is all made of Q235B steel.
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, and after unwrapping wire positioning, drilling machine is in place, and soil taking hole forming is until design bottom hole absolute altitude, and for example Yao He Zhuan Quan in pore-forming
Steel reinforcement cage, after-pouring concrete tube drawing pile are hung after passed examination；
Step 2: according to design requirement and leading wall and determine 1 position of ground-connecting-wall, chute forming machine carries out excavation operation, and the present embodiment is adopted
With the 480 type hydraulic grab bucket grooving machine grooving of Xu work, when grooving, uses mud off, until depth and adjacent interlocking pile buried depth phase
Together, then slot examination is carried out；
Step 3: the construction of ground-connecting-wall 1 and 2 seam crossing of interlocking pile element stake is carried out, it is plain close to interlocking pile when 1 grooving of ground-connecting-wall
2 sides of stake expand grooving width of wall body 200mm using churning driven, it is ensured that when casting concrete, concrete can be carried on the back around channel steel is flowed through
Face；It is bored using churning driven except interlocking pile element stake 2 at Partial seams, ground-connecting-wall 1 is made to be engaged 300mm with adjacent interlocking pile element stake 2, it is right
After 2 brush wall of interlocking pile element stake, steel reinforcement cage, casting concrete are hung；
Step 4: crown beam 3, which is carried out, in 2 stake top of interlocking pile and 1 wall top of ground-connecting-wall constructs, first line setting, then assembling reinforcement,
Then support template, casting concrete form armored concrete crown beam 3, and the reserved reinforcing bar connecting with armored concrete support 4, ground
Even the crown beam 3 of wall 1 and 2 connecting place of interlocking pile element stake should pour integrally；
Step 5: when crown beam 3 is constructed, first of reinforced concrete support 4 of constructing applies bed course, reinforcement welding,
Binding, installation, template installation and reinforcing, casting concrete, curing concrete after demoulding, when intensity to be supported reaches 75%, after
Continuous to cut the earth downwards, foundation pit corner is supportted using 2000mm × 2000mm × 300mm concrete slab, remaining uses armored concrete
To support and armored concrete diagonal brace；
Step 6: in interlocking pile, construction part uses 13 m esh-hanging sprayed concrete of anchor bar to form in-network processing layer
9, thickness 100mm, after mortar levelling layer 10, thickness 20mm are on in-network processing layer 9, then do waterproof layer on screed-coat 10
11, last shotcrete layer 12, thickness 100mm forms side wall 6；
Step 7: purlin 7 being installed by designed elevation, triangular supports 23 are installed in purlin 7, with two diameter 20mm's
YG2 type tube expansion bolt 19 fastens triangular supports 23, and the gap between purlin 7 and side wall 12 is filled with C30 pea gravel concreten；It hangs
Steel loading purlin 7 is close to wall, then installs YG2 tube expansion bolt 18, and the steel purlin 7 at diagonal brace answers pre-buried antiskid part 24；
Step 8: 5 entirety splicing lifting of bracing members is installed using 10t gantry crane, after bracing members 5 are installed in place, every Pin support
The classification of steel pipe support movable end pre-add is withstood on 2 100t platform hydraulic jacks and applies axle power, and is locked, and wedge block 25 is added
Afterwards, the installation that jack completes bracing members 5 is removed；Two bors d's oeuveres I56c shape steel diagonal supporting is used in foundation pit corner, remaining uses Two bors d's oeuveres
Bracing members are to support and Two bors d's oeuveres bracing members diagonal brace.
Step 9: continuing first support after excavating and dig afterwards, set up third road bracing members 5 in time, measurement and positioning anchors triangle
Bracket 23 installs purlin 7, bracing members 5, applies prestressing force, after adding wedge block, removes the installation that jack completes bracing members.
Claims (6)
1. a kind of interlocking pile combines foundation pit supporting construction with ground-connecting-wall, it is characterised in that main structure includes ground-connecting-wall, interlocking pile
Plain stake, crown beam, reinforced concrete support, bracing members, external wall structure, purlin and Yao He Zhuan Quan；According to different engineering geology
Condition, technical requirements select ground-connecting-wall or interlocking pile as main body supporting construction, and the stake of interlocking pile element is engaged shape with conjunction stake Quan is stung
At occlusion pile body；In ground-connecting-wall and interlocking pile seam crossing, the interlocking pile adjacent with ground-connecting-wall is the stake of interlocking pile element, and the two is engaged phase
Even；Interlocking pile is connected with external wall structure, forms smooth metope；Crown beam is poured respectively in ground-connecting-wall and interlocking pile top；First
Support is reinforced concrete support, is connected with the reserved steel bar in crown beam, mixed using reinforcing bar according to foundation pit shape and loading characteristic
Solidifying soil angle brace, armored concrete are to support, armored concrete diagonal brace；It is enclosed on ground-connecting-wall and external wall structure by designed elevation installation
Purlin；The support of second and third road is the bracing members of Two bors d's oeuveres structure, and bracing members are connected with purlin, are made according to foundation pit shape and loading characteristic
To support, bracing members diagonal brace and reinforcement measure is taken with bracing members angle brace, bracing members.
2. interlocking pile combines foundation pit supporting construction with ground-connecting-wall according to claim 1, it is characterised in that the underground is continuous
The specific size of wall according to the size of concrete engineering and interlocking pile determine, diaphram wall breadth be not more than 6m, buried depth be 10m extremely
50m is less than adjacent interlocking pile element stake diameter at least 200mm with a thickness of 0.5m to 1.2m, close convenient for the two occlusion；Interlocking pile
The diameter and buried depth of plain stake should determine that diameter is not less than 1000mm according to concrete engineering, at least be poured with C25 ultra-retardation concrete
It builds, is engaged between adjacent studs stake not less than 300mm；The diameter and buried depth of Yao He Zhuan Quan determines that diameter is not according to concrete engineering
Less than 1000mm, at least with the underwater coagulation concreting of C45, it is engaged between adjacent studs stake not less than 300mm；The size of crown beam
For 1200 × 1000mm, 1500 × 1000mm, C45 concreting is at least used；The type of reinforced concrete support, length, cross
Sectional area is determined as 800 × 1000mm according to foundation pit size and specific load, at least uses C45 concreting.
3. interlocking pile combines foundation pit supporting construction with ground-connecting-wall according to claim 1, it is characterised in that the external wall structure
Including in-network processing layer, mortar levelling layer, construction waterproof layer, side wall, linked network injection is mixed on anchor bar on the inside of the interlocking pile
Solidifying soil forms in-network processing layer, and thickness is not less than 80mm, and the outside of in-network processing layer is the mortar that thickness is not less than 20mm
Screed-coat, construction waterproof layer on the outside of mortar levelling layer pour side wall on the outside of waterproof layer, and thickness is not less than 20mm.
4. interlocking pile combines foundation pit supporting construction with ground-connecting-wall according to claim 1, it is characterised in that the purlin uses
Two bors d's oeuveres I-steel is combined, Q235B steel is generally used, purlin is erected in triangular supports, and triangular supports use diameter 20mm
YG2 type tube expansion bolt be connected with ground-connecting-wall, connection length is not less than 280mm, pre- in the purlin inside wall body of setting diagonal brace
Non-slip material is buried, for enhancing the resistant slide ability of purlin, Non-slip material is formed by steel plate and reinforcement welding, and the thickness of steel plate is not less than
20mm, reinforcing bar are Ribbed Bar, and diameter is not less than 20mm.
5. interlocking pile combines foundation pit supporting construction with ground-connecting-wall according to claim 1, it is characterised in that the bracing members
Length, diameter, wall thickness should be determined according to foundation pit size and specific load, use bracing members angle brace, bracing members according to foundation pit shape
To support, bracing members diagonal brace, the fastening members of bracing members be by the first round steel suspension hook of diameter 20mm, the second round steel suspension hook respectively with
It is welded between bracing members, YG2 tube expansion bolt, the first round steel suspension hook, the second round steel suspension hook are bent to U-shaped, length by plain bar
Not less than 50mm, YG2 tube expansion bolt is embedded in above purlin at 800mm, uses diameter between round steel suspension hook and YG2 tube expansion bolt
The round steel S type connector of 20mm is connected with fastening screw, and when bracing members are diagonal brace, shearing is welded between bracing members and purlin
Block, shears the size of block and material meets concrete engineering requirement.
6. interlocking pile combines foundation pit supporting construction with ground-connecting-wall according to claim 1, it is characterised in that real using the structure
The detailed process of existing interlocking pile and ground-connecting-wall combined supporting are as follows:
Step 1: carry out the construction of interlocking pile, pay attention to the interlocking pile adjacent with ground-connecting-wall for plain stake, in order to ground-connecting-wall with it is adjacent
Interlocking pile element stake occlusion, after unwrapping wire positioning, drilling machine is in place, and for soil taking hole forming until design bottom hole absolute altitude, meat or fish stake should be in pore-forming inspection
Steel reinforcement cage, after-pouring concrete tube drawing pile are hung after qualification.
Step 2: carrying out the construction of ground-connecting-wall, the unwrapping wire of ground-connecting-wall positions construction of guide wall, prepares mud, after grooving, hang reinforcing bar
Cage casting concrete forms ground-connecting-wall；
Step 3: the construction of ground-connecting-wall and interlocking pile seam crossing is carried out, when ground-connecting-wall grooving, close to the use of interlocking pile element stake side
Churning driven expands grooving width of wall body at least 200mm, it is ensured that when casting concrete, concrete can be around flowing through the channel steel back side；Using
Churning driven is bored except interlocking pile element stake at Partial seams, is engaged ground-connecting-wall with adjacent interlocking pile element stake at least 300mm, to occlusion
After the plain stake brush wall of stake, steel reinforcement cage, casting concrete are hung；
Step 4: carrying out crown beam construction, first line setting, then assembling reinforcement in interlocking pile element stake top and ground-connecting-wall wall top, then
Support template, casting concrete form armored concrete crown beam, and the reserved reinforcing bar with armored concrete support connection, ground-connecting-wall with
The crown beam of interlocking pile element stake connecting place should pour integrally；
Step 5: in crown beam construction, first of reinforced concrete support of constructing applies bed course, reinforcement welding, binding, installation,
Template installation and reinforcing, casting concrete, curing concrete after demoulding when intensity to be supported reaches 75%, continue to cut the earth downwards；
Step 6: carrying out piling wall and combine construction, construction part uses anchor bar m esh-hanging sprayed concrete to form net in interlocking pile
Pneumatically placed concrete layer, thickness is not less than 100mm, then mortar levelling layer is done on in-network processing layer, and thickness is not less than 20mm, then
Waterproof layer is done on screed-coat, last shotcrete layer forms side wall；
Step 7: purlin being installed by designed elevation, triangular supports are installed in purlin, with the YG2 type tube expansion of two diameter 20mm
Bolt fastening triangular supports, the gap between purlin and side wall are filled with C30 pea gravel concreten；It lifts steel purlin and is close to wall
Body, then YG2 tube expansion bolt is installed, the steel purlin at diagonal brace answers pre-buried antiskid part；
Step 8: bracing members integrally splice lifting to be installed using 10t gantry crane, and after bracing members installation is in place, every Pin support is with two
100t platform hydraulic jack withstands on the classification of steel pipe support movable end pre-add and applies axle power, and is locked, and after adding wedge block, removes
The installation of jack completion bracing members；
Step 9: continuing first support after excavating and dig afterwards, set up third road bracing members in time；Measurement and positioning anchors triangular supports,
Purlin, bracing members are installed, prestressing force is applied, after adding wedge block, removes the installation that jack completes bracing members.
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| CN201910669491.1A CN110485431A (en) | 2019-07-24 | 2019-07-24 | A kind of interlocking pile combines foundation pit supporting construction with ground-connecting-wall |
| PCT/CN2020/103603 WO2021013200A1 (en) | 2019-07-24 | 2020-07-22 | Secant pile and retaining wall combined foundation pit supporting structure and method |
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| CN201910669491.1A CN110485431A (en) | 2019-07-24 | 2019-07-24 | A kind of interlocking pile combines foundation pit supporting construction with ground-connecting-wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021013200A1 (en) * | 2019-07-24 | 2021-01-28 | 青岛理工大学 | Secant pile and retaining wall combined foundation pit supporting structure and method |
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