CN206800370U - It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground without fertile groove - Google Patents

It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground without fertile groove Download PDF

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Publication number
CN206800370U
CN206800370U CN201720401575.3U CN201720401575U CN206800370U CN 206800370 U CN206800370 U CN 206800370U CN 201720401575 U CN201720401575 U CN 201720401575U CN 206800370 U CN206800370 U CN 206800370U
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China
Prior art keywords
steel
layer
embedded
underground
side wall
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Expired - Fee Related
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CN201720401575.3U
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Chinese (zh)
Inventor
谭新平
刘科
徐张建
燕建龙
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NORTHWEST RESEARCH INSTITUTE OF ENGINEERING INVESTIGATIONS AND DESIGN
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NORTHWEST RESEARCH INSTITUTE OF ENGINEERING INVESTIGATIONS AND DESIGN
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Abstract

The utility model discloses one kind the continuous side wall supporting and retaining system protective construction in underground is excavated without fertile groove,The soil body including foundation pit side-wall,Support pile is arranged at intervals with the soil body,Anchor cable is provided with the soil body,Shotcrete with steel bar nets layer is provided with soil body surface,Banding steel plate is provided with shotcrete with steel bar nets layer,Anchor head is provided with banding steel plate,Mortar levelling layer is provided with shotcrete with steel bar nets layer surface,Waterproof roll layer is provided with mortar levelling layer and bottom of foundation ditch,In waterproof roll layer surface, reinforced concrete floor is set,Interval is embedded with steel plate on reinforced concrete floor,Template is provided with reinforced concrete floor surface location,Supporting member is arranged at intervals with secondary joist surface,Provided with bearing diagonal I-steel,Guan Liang is provided with the top of support pile,Interval is embedded with embedded steel tube in Guan Liang,Skeleton frame is provided with the reinforced concrete floor of secondary joist side and bottom of foundation ditch,It is provided with embedded steel tube and will be close to the steel tube fastener that the skeleton frame of secondary joist side tenses.

Description

It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground without fertile groove
Technical field
It the utility model is related to the realm of building construction, specific design is a kind of without fertile groove to be excavated the continuous side wall supporting and retaining system in underground and prevent Shield construction.
Background technology
The continuous side wall construction in conventional building underground, typically from wall basis to extending out 1.5-2.0m as fertile groove of constructing Excavated, in order to the formwork outside foundation ditch and build scaffold, cheated and more than bottom excavate when taking slope or soil-nail wall support Scope will also increase, due to amplifying outside excavation construction, excavation amount increase, while constructed and backfilled again, engineering cost is same When also increase;It is big that digging scope backfill soil thickness is often decontroled outside this fertile groove, is limited by operation, it is also difficult to ensure backfill quality, Differential settlement texturing quality accident is commonly formed in foundation ditch periphery;Some places are limited foundation ditch by environment and are also difficult to outwards spread Dig;It is waist rail that conventional pile-anchor retaining construction anchor head, which takes I-steel, also occupies foundation ditch space.
Utility model content
In order to solve deficiency of the prior art, there is provided one kind can meet that civil Engineering Design, deep foundation pit support and side wall are applied Work safety, waterproof requirement, and can is not related to fertile groove earth excavation and backfill, to save construction costs, and accelerates underground engineering and applies The engineering construction of work progress, technical scheme is used by the utility model:
It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground without fertile groove, include the soil body of foundation pit side-wall, in described soil Armored concrete support pile is arranged at intervals with close to foundation ditch side on body, interval is embedded with anchor cable in the described soil body, in soil Body surface face is provided with shotcrete with steel bar nets layer, and banding steel plate is provided with shotcrete with steel bar nets layer, is provided with described banding steel plate and anchor cable The anchor head of connection, mortar levelling layer is provided with described shotcrete with steel bar nets layer surface, is set in the mortar levelling layer and bottom of foundation ditch There is waterproof roll layer, reinforced concrete floor is set in described waterproof roll layer surface, in the reinforced concrete floor of bottom of foundation ditch Upper interval is embedded with steel plate, is provided with template in vertical plane reinforced concrete floor surface location, is provided with the described template surface Secondary joist, the supporting member being fixedly connected with template is arranged at intervals with the secondary joist surface, in described supporting member and Bearing diagonal I-steel is provided between steel plate, Guan Liang is provided with the top of described support pile, is spaced and is embedded with described Guan Liang Embedded steel tube, skeleton frame is provided with the reinforced concrete floor of secondary joist side and bottom of foundation ditch, in described embedded steel tube It is provided with and will be close to the steel tube fastener that the skeleton frame of secondary joist side tenses.
Described bearing diagonal I-steel is welded on supporting member and steel plate.
Described skeleton frame is acted against on supporting member.
Described supporting member is fastened on secondary joist by bolt and template.
Described anchor cable is arranged at intervals one or multi-channel, and vertical direction spacing is 2m-5m during multiple tracks;Described anchor cable and water Plane included angle is 10 ° -15 °.
Described bearing diagonal I-steel is in 45 ° of bearing diagonals, and a pair of reinforcing branch are additionally provided with described bearing diagonal I-steel Strut, described reinforcement support bars are respectively in 30 ° and 60 ° settings.
The beneficial effects of the utility model are:The utility model utilizes excavates the continuous side wall supporting and retaining system protection in underground without fertile groove Construction avoids the outer fertile groove earth excavation put of conventional side wall construction and corresponding stemming operation amount, excavates range shorter, overcomes The limitation of place excavation condition, improves construction environment, not only realizes deep pit digging safety support and waterproof civil Engineering Design With construction safety requirement, it also a saving construction costs, accelerate construction speed;Supporting construction banding steel plate, anchor head are by screed Covering, be advantageous to anti-corrosion protection, extend supporting construction service life;Support pile is close to the continuous side wall in underground, reduces soil pressure Influence of the power to side wall, while support pile can be carried as the drawing of structural anti-buoyancy anchor or top, it is favourable to building body monolithic stability;Side Collateral gear protective construction material can be recycled within the walls, save cost.
Brief description of the drawings
Fig. 1 is construction vertical cross-section schematic diagram of the present utility model;
It is tectonic level perspective view of the present utility model that Fig. 2, which is,;
Embodiment
Refer to a kind of without the continuous side wall supporting and retaining system protection structure in fertile groove excavation underground, including foundation ditch side shown in Fig. 1 to Fig. 2 The soil body 3 of wall, it is adjacent to foundation ditch location interval in the soil body 3 and concrete support stake 21 is set, shotcrete with steel bar nets layer is set on the surface of the soil body 3 1 is affixed on the outside of armored concrete support pile 21, has anchor cable 41 in the punching slip casting of the medium position of the soil body 3, anchor cable 41 passes through anchor head 42 It is locked on the banding steel plate 5 of the side of shotcrete with steel bar nets layer 1 and tenses, mortar levelling layer 6 is taken turns doing outside shotcrete with steel bar nets layer 1, is prevented Water coiled material layer 7, wherein waterproof roll layer 7 is also done together with bottom of foundation ditch when doing waterproof roll layer 7, the shape on waterproof roll layer 7 Into reinforced concrete floor 8, reinforced concrete floor 8 includes:The reinforced concrete floor 8 of bottom of foundation ditch and the vertical plane reinforcing bar of foundation pit side-wall Concrete layer 8, during construction since the reinforced concrete floor 8 of the bottom of foundation ditch poured, the good vertical plane reinforced concrete of upward colligation The bar-mat reinforcement of soil layer 8, template 15 is set in the outside of vertical plane reinforced concrete floor 8 afterwards, in the reinforced concrete floor 8 of bottom of foundation ditch Upper interval is pre-buried to be provided with steel plate 11, is adjacent to template 15 and sets secondary joist 14, supporting member 13 is arranged at intervals on secondary joist 14, Supporting member 13 is fixed in template 15 through secondary joist 14 by bolt and is strained and fixed, between steel plate 11 and supporting member 13 Set bearing diagonal I-steel 12 to support secondary joist 14, set on the reinforced concrete floor 8 of the side of secondary joist 14 and bottom of foundation ditch Skeleton frame 10 is put, main joist one end is acted against on supporting member 13;Guan Liang 22 is provided with the top of concrete support stake 21, is being preced with Interval is embedded with embedded steel tube 162 on beam 22, is provided with embedded steel tube 162 and the top of main joist 10 by the side of secondary joist 14 Steel tube fastener 161, main joist 10 is tensed to embedded steel tube 162 by steel tube fastener 161.
In order that bearing diagonal I-steel 12 is firm, a pair of reinforcement support bars 9 are provided with bearing diagonal I-steel 12, reinforce branch The one end of strut 9 acts against the bottom end of secondary joist 14, and bearing diagonal I-steel 12 is in 45 ° of settings, and a pair of reinforcement support bars 9 are distinguished In 30 ° and 60 ° settings, reinforcement support bars 9 are set to play a part of reinforcing support to bearing diagonal I-steel 12, and lean The bottom of secondary joist 14 also can stress when firmly the bottom of secondary joist 14 can be such that the main joist 10 is acted on by the tightening force of steel tube fastener 161 To compression template 15.
Above structure stream line 41 is one or multi-channel in same plane interval setting, and horizontal direction spacing is the same as between support pile 21 Vertical spacing is 2m-5m during away from, multiple tracks, and each anchor cable 41 and horizontal plane angle are 10 ° -15 °.
By main joist 10, the bearing diagonal I-steel 12 being welded on pre-embedded steel slab 11, supporting member 13, secondary joist 14 come Support and anchor draw fixed form 15, then will be perpendicular at the embedded steel tube 162 in stake top Guan Liang 22 and template 15 with steel tube fastener 161 To main joist 10 to drawing, make inside and outside supporting and retaining system safeguard structure stable connection, form stabilization pours underground continuous reinforced concrete layer 8 Supporting and retaining system safeguard structure.
Armored concrete support pile 21, it is circular bore bored concrete pile, stake footpath is 600mm-1000mm, and stake spacing is 1.5m- 2.0m, stake position tolerance are 50mm, and the perpendicularity tolerance of stake is 1%, and pile bottom sediment thickness tolerance is 200mm; Steel reinforcement cage cage bar spacing tolerance is ± 10mm, and stirrup spacing tolerance is ± 50mm, and thickness of protection tier is not small 50mm;Its concrete grade is not less than C25.
Guan Liang 22, position are less than nature ground, and width is not less than the diameter of armored concrete support pile 21, is highly not less than 400mm, the not small 25mm of thickness of protection tier, its concrete grade are not less than C25.
Shotcrete with steel bar nets layer 1, it is close to the described outer wall vertical of armored concrete support pile 21 construction, linked network material is bar-mat reinforcement Or expanded metal lath, the bar diameter 6.5mm of bar-mat reinforcement, two-way spacing 200mm, expanded metal lath model 50mm × 100mm diamond wires Net, highly reinforcement is consolidated in the reinforcement of institute's linked network piece external pressure together a diameter of 14mm, then with expansion bolt by 1.5m-2.0m Due on the described pile body of armored concrete support pile 21, gunite layer strength grade of concrete C20, thickness 50mm-80mm.
Anchor cable 41, it is placed between armored concrete support pile 21, is typically not less than 4m away from the apical side height of Guan Liang 22, can basis The vertically arranged multiple tracks anchor cable 41 of ground load size on the outside of excavation of foundation pit depth, foundation ditch, vertical spacing 2m-5m during multiple tracks;Anchor cable 41 drilling diameter 120-150mm, 10-15 ° of angle of inclination is 2-4 beam steel strand wires, and freedom length is not preferably less than 5m and overcoat Plastic tube, injecting cement paste material are cement mortar or cement mortar, and its strength grade is not less than M15.
Banding steel plate 5 is affixed on the surface of shotcrete with steel bar nets layer 1, and steel plate thickness is not less than 20mm, and steel plate is cut into wide 25-50mm Banding, lap-joint take butt welding to add and tie up weldering connection, and anchor pulling eye, aperture 50-60mm are beaten by the corresponding spaced position of anchor cable 41.
Anchor head 42 is made up of pressure-bearing steel plate and lockset, and pressure-bearing steel plate is that 200mm × 200mm is square, thickness 20mm, interstitial hole Diameter 50-60mm.
Mortar levelling layer 6, material are M10 cement mortar, and average thickness is not less than 20mm.
Waterproof roll layer 7, the surface of mortar levelling layer 6 is affixed on, thickness 4mm, is twice SBS waterproof rolls.
Template 15 is 18mm thickness bamboo slab rubbers.
Secondary joist 14 is 100mm × 100mm lumps of wood.
Bearing diagonal I-steel No. 10 I-steel of 12 model.
Main joist 10, embedded steel tube 162 are for diameter 48mm, thickness 3.5mm steel pipes.
Supporting member 13, by 2 diameter 48mm, thickness 3.5mm steel pipes and 1 No. 10 channel-section steels are formed, and channel-section steel is buckled in steel pipe On, and fixed the template 15 and supporting member 13 to drawing with M14 bolts.
Bearing diagonal I-steel 12 and 45 ° of 8 angle of reinforced concrete floor of bottom of foundation ditch, step pitch and spacing are set for 60mm, It is respectively welded and is supported on supporting member 13 and pre-embedded steel slab 11, between each road bearing diagonal I-steel 12, by 30 °, 60 ° of orientation Weld twice reinforcement support bars 9 again respectively in angle.
Main joist 10 is divided to be vertical and horizontal two kinds, and it is 60mm to set step pitch and spacing, is vertically placed in the steel of bottom of foundation ditch On reinforced concrete layer 8, vertically connected with lateral cross with fastener, horizontal one end is supported on the supporting member 13, another Symmetric support is held in the opposite side of foundation ditch.
Pre-embedded steel slab 11, the reinforcing bar for being embedded in bottom of foundation ditch in advance by the lower support point position of bearing diagonal I-steel 12 mix In solidifying soil layer 8, pre-embedded steel slab 11 is 400mm × 300mm rectangles, thickness 10mm, and 4 diameter 20mm " L " shape reinforcing bars of welding are inserted Enter 50mm in the reinforced concrete floor 8 of the bottom of foundation ditch.
Embedded steel tube 162 is pre-buried and size of the exposure in stake top Guan Liang 22 is 300mm, spacing 600mm.
For to recited above a kind of without the fertile groove excavation continuous side wall supporting and retaining system protection construction method in underground, including following step Suddenly:
Step (1), measuring foundation ditch ground lower side wall, the position of armored concrete support pile;
Step (2), the stake of construction reinforced bar concrete support, Guan Liang, and embedded embedded steel tube is spaced in Guan Liang;
Step (3), along the downward stage excavation pit earthwork in support pile edge, equating pit foundation side wall, hung in pit foundation side wall Net gunite layer;
Step (4), anchor cable hole, lower good anchor cable grouting behind shaft or drift lining to design strength grade are beaten in pit foundation sidewall design anchor cable position;
Step (5), in shotcrete with steel bar nets layer side wall banding steel plate is set, and accomplishes fluently anchor on banding steel plate by anchor cable hole site Hole, anchor head is fixed when reaching design pulling force by the injecting cement paste of anchor head stretch-draw anchor to anchor cable;
Step (6), along support pile edge Foundation Pit bottom is excavated to downwards, continue to do shotcrete with steel bar nets layer in pit foundation side wall, Shotcrete with steel bar nets layer surface making cement mortar levelling layer, does bottom cushion, in floor cushion coat and cement mortar screeding at Foundation Pit bottom Layer surface does waterproof roll layer.
Step (7), assembling reinforcement net and pre-buried good steel plate on bottom of foundation ditch waterproof layer, the construction casting bottom on bar-mat reinforcement Plate reinforced concrete floor;
Step (8), in the good bar-mat reinforcement of foundation pit side-wall colligation, template is set on the outside of bar-mat reinforcement, set on the outside of template time Keel, supporting member is arranged at intervals on secondary joist, skewed horizontal load I-steel is welded between supporting member and steel plate, and secondary The main joist construction of baseplate reinforcing bar concrete layer is placed in outside keel;
Step (9), with fastener and steel pipe by embedded steel tube in Guan Liang and the vertical main joist pair close to foundation pit side-wall side Draw and fix, construction casting pit foundation side vertical plane concrete layer.
In above-mentioned steps:Discharged in step (6) firstly the need of by foundation ditch internal water accumulation.
Quality check process all should be included in above steps.
After reinforced concrete floor is fully completed, then carry out subsequent handling operation.
Above-described is only embodiment of the present utility model, it should be noted here that the ordinary skill for this area For personnel, on the premise of not departing from the utility model and creating design, improvement can also be made, but these belong to this practicality New protection domain.

Claims (6)

1. a kind of excavate the continuous side wall supporting and retaining system protective construction in underground without fertile groove, include the soil body (3) of foundation pit side-wall, its feature exists In:Armored concrete support pile (21) is arranged at intervals with close to foundation ditch side on the described soil body (3), in the described soil body (3) interval is embedded with anchor cable (41) in, is provided with shotcrete with steel bar nets layer (1) on the soil body (3) surface, is provided with shotcrete with steel bar nets layer (1) Banding steel plate (5), the anchor head (42) being connected with anchor cable (41) is provided with described banding steel plate (5), is sprayed in described linked network Pulp layer (1) surface is provided with mortar levelling layer (6), and waterproof roll layer (7) is provided with the mortar levelling layer (6) and bottom of foundation ditch, On described waterproof roll layer (7) surface, reinforced concrete floor (8) is set, on the reinforced concrete floor (8) of bottom of foundation ditch between Every being embedded with steel plate (11), template (15) is provided with vertical plane reinforced concrete floor (8) surface location, in the described template (15) surface is provided with secondary joist (14), and the support being fixedly connected with template (15) is arranged at intervals with the secondary joist (14) surface Component (13), bearing diagonal I-steel (12) is provided between described supporting member (13) and steel plate (11), in described supporting Guan Liang (22) is provided with the top of stake (21), interval is embedded with embedded steel tube (162) in described Guan Liang (22), in secondary joist (14) The reinforced concrete floor of side and bottom of foundation ditch (8) is provided with skeleton frame (10), is provided with described embedded steel tube (162) It will be close to the steel tube fastener (161) that the skeleton frame (10) of secondary joist (14) side tenses.
It is 2. according to claim 1 a kind of without the fertile groove excavation continuous side wall supporting and retaining system protective construction in underground, it is characterised in that:Institute The bearing diagonal I-steel (12) stated is welded on supporting member (13) and steel plate (11).
It is 3. according to claim 1 a kind of without the fertile groove excavation continuous side wall supporting and retaining system protective construction in underground, it is characterised in that:Institute The skeleton frame (10) stated is acted against on supporting member (13).
It is 4. according to claim 1 a kind of without the fertile groove excavation continuous side wall supporting and retaining system protective construction in underground, it is characterised in that:Institute The supporting member (13) stated is fastened on secondary joist (14) by bolt and template (15).
It is 5. according to claim 1 a kind of without the fertile groove excavation continuous side wall supporting and retaining system protective construction in underground, it is characterised in that:Institute The anchor cable (41) stated is arranged at intervals one or multi-channel, and horizontal direction spacing is with the spacing of support pile 21, and vertical spacing is 2m- during multiple tracks 5m;Described anchor cable (41) is 10 ° -15 ° with horizontal plane angle.
It is 6. according to claim 1 a kind of without the fertile groove excavation continuous side wall supporting and retaining system protective construction in underground, it is characterised in that:Institute The bearing diagonal I-steel (12) stated is in 45 ° of bearing diagonals, and a pair of reinforcings support is additionally provided with described bearing diagonal I-steel (12) Bar (9), described reinforcement support bars are respectively in 30 ° and 60 ° settings.
CN201720401575.3U 2017-04-17 2017-04-17 It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground without fertile groove Expired - Fee Related CN206800370U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106930271A (en) * 2017-04-17 2017-07-07 西北综合勘察设计研究院 It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground and its construction method without fertile groove
CN111270679A (en) * 2020-03-18 2020-06-12 长江勘测规划设计研究有限责任公司 Construction method and structure of foundation pit fender pile opening excavation processing structure
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106930271A (en) * 2017-04-17 2017-07-07 西北综合勘察设计研究院 It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground and its construction method without fertile groove
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
CN111270679A (en) * 2020-03-18 2020-06-12 长江勘测规划设计研究有限责任公司 Construction method and structure of foundation pit fender pile opening excavation processing structure

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Granted publication date: 20171226