CN110485430A - A kind of interlocking pile combines foundation pit supporting method with ground-connecting-wall - Google Patents

A kind of interlocking pile combines foundation pit supporting method with ground-connecting-wall Download PDF

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Publication number
CN110485430A
CN110485430A CN201910669401.9A CN201910669401A CN110485430A CN 110485430 A CN110485430 A CN 110485430A CN 201910669401 A CN201910669401 A CN 201910669401A CN 110485430 A CN110485430 A CN 110485430A
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CN
China
Prior art keywords
wall
ground
interlocking pile
bracing members
stake
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CN201910669401.9A
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Chinese (zh)
Inventor
白晓宇
张明义
王永洪
马加骁
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Qingdao University of Technology
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Qingdao University of Technology
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Application filed by Qingdao University of Technology filed Critical Qingdao University of Technology
Priority to CN201910669401.9A priority Critical patent/CN110485430A/en
Publication of CN110485430A publication Critical patent/CN110485430A/en
Priority claimed from PCT/CN2020/103603 external-priority patent/WO2021013200A1/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18Bulkheads or similar walls made solely of concrete in situ
    • E02D5/187Bulkheads 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
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/36Concrete 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 method 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

A kind of interlocking pile combines foundation pit supporting method with ground-connecting-wall
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 side with ground-connecting-wall Method.
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 method.
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 method enhances the stability and safety of supporting construction.
To achieve the goals above, the present invention is realized by interlocking pile and ground-connecting-wall combined retaining structure, detailed process 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.
The main structure of interlocking pile of the present invention and ground-connecting-wall combined retaining structure include ground-connecting-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 different engineering geological conditions, Technical requirements select ground-connecting-wall or interlocking pile as main body supporting construction, and the stake of interlocking pile element is stung with stinging to close stake Quan and be engaged to be formed Close 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 occlusion is connected; 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 of support For reinforced concrete support, it is connected with the reserved steel bar in crown beam, armored concrete is used according to foundation pit shape and loading characteristic Angle brace, armored concrete are to support, armored concrete diagonal brace;Purlin is installed by designed elevation on ground-connecting-wall and external wall structure;The Two, three supports are the bracing members of Two bors d's oeuveres structure, and bracing members are connected with purlin, use steel branch according to foundation pit shape and loading characteristic Support angle support, bracing members to support, bracing members diagonal brace and take reinforcement measure.
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.
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 method with ground-connecting-wall, it is characterised in that pass through interlocking pile and ground-connecting-wall combined supporting Structure realization, detailed process 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.
2. interlocking pile combines foundation pit supporting method with ground-connecting-wall according to claim 1, it is characterised in that the interlocking pile and ground are even Wall joint foundation pit supporting construction main structure include ground-connecting-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 different engineering geological conditions, technical requirements, ground-connecting-wall or interlocking pile are selected As main body supporting construction, the stake of interlocking pile element is engaged formation occlusion pile body with conjunction stake Quan is stung;In ground-connecting-wall and interlocking pile seam Place, the interlocking pile adjacent with ground-connecting-wall are the stake of interlocking pile element, and the two occlusion is connected;Interlocking pile is connected with external wall structure, is formed flat Whole metope;Crown beam is poured respectively in ground-connecting-wall and interlocking pile top;First of support is on reinforced concrete support, with crown beam Reserved steel bar is connected, according to foundation pit shape and loading characteristic using armored concrete angle brace, armored concrete to support, reinforced concrete Native 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 steel branch of Two bors d's oeuveres structure Support, bracing members are connected with purlin, oblique to support, bracing members using bracing members angle brace, bracing members according to foundation pit shape and loading characteristic It supports and takes reinforcement measure.
3. interlocking pile combines foundation pit supporting method with ground-connecting-wall according to claim 2, 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.
4. interlocking pile combines foundation pit supporting method with ground-connecting-wall according to claim 2, 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.
5. interlocking pile combines foundation pit supporting method with ground-connecting-wall according to claim 2, 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.
6. interlocking pile combines foundation pit supporting method with ground-connecting-wall according to claim 2, 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.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110952985A (en) * 2019-11-28 2020-04-03 苏州中车建设工程有限公司 Sliding type vertical shaft annular steel support assembly and construction method
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
CN112962667A (en) * 2021-02-08 2021-06-15 中国建筑第八工程局有限公司 Outer wall structure of sinking yard and construction method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106120828A (en) * 2016-06-23 2016-11-16 程华清 A kind of Sandwich biscuit type curtain water stop construction method of diaphragm wall
CN208023589U (en) * 2017-12-08 2018-10-30 中冶天工集团天津有限公司 A kind of supporting type water-stop curtain
KR20180124795A (en) * 2018-08-22 2018-11-21 박강호 An Earth Retaining Wall with Underground Buttresses and A Method of Constructing the same
CN109208637A (en) * 2018-08-08 2019-01-15 北京建工土木工程有限公司 Increase the construction method of open-cut station newly on the basis of existing tunnel
CN208717918U (en) * 2018-09-04 2019-04-09 龙喜安 The enclosure structure of foundation pit of subway station of high-voltage line or overpass is worn under a kind of
CN109630127A (en) * 2018-11-22 2019-04-16 中铁隧道集团二处有限公司 A kind of construction method of rich water soft stratum ultra-deep shield vertical shaft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106120828A (en) * 2016-06-23 2016-11-16 程华清 A kind of Sandwich biscuit type curtain water stop construction method of diaphragm wall
CN208023589U (en) * 2017-12-08 2018-10-30 中冶天工集团天津有限公司 A kind of supporting type water-stop curtain
CN109208637A (en) * 2018-08-08 2019-01-15 北京建工土木工程有限公司 Increase the construction method of open-cut station newly on the basis of existing tunnel
KR20180124795A (en) * 2018-08-22 2018-11-21 박강호 An Earth Retaining Wall with Underground Buttresses and A Method of Constructing the same
CN208717918U (en) * 2018-09-04 2019-04-09 龙喜安 The enclosure structure of foundation pit of subway station of high-voltage line or overpass is worn under a kind of
CN109630127A (en) * 2018-11-22 2019-04-16 中铁隧道集团二处有限公司 A kind of construction method of rich water soft stratum ultra-deep shield vertical shaft

Cited By (4)

* Cited by examiner, † Cited by third party
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
CN110952985A (en) * 2019-11-28 2020-04-03 苏州中车建设工程有限公司 Sliding type vertical shaft annular steel support assembly and construction method
CN110952985B (en) * 2019-11-28 2021-10-26 苏州中车建设工程有限公司 Sliding type vertical shaft annular steel support assembly and construction method
CN112962667A (en) * 2021-02-08 2021-06-15 中国建筑第八工程局有限公司 Outer wall structure of sinking yard and construction method thereof

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