CN208346827U - Foundation pit comprehensive support structure - Google Patents

Foundation pit comprehensive support structure Download PDF

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Publication number
CN208346827U
CN208346827U CN201820881733.4U CN201820881733U CN208346827U CN 208346827 U CN208346827 U CN 208346827U CN 201820881733 U CN201820881733 U CN 201820881733U CN 208346827 U CN208346827 U CN 208346827U
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CN
China
Prior art keywords
foundation pit
sheet pile
steel sheet
anchor
steel
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Expired - Fee Related
Application number
CN201820881733.4U
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Chinese (zh)
Inventor
吴福顺
王清波
庄明裕
许美娟
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Spring Hair Construction Ltd By Share Ltd
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Spring Hair Construction Ltd By Share Ltd
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Priority to CN201820881733.4U priority Critical patent/CN208346827U/en
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Publication of CN208346827U publication Critical patent/CN208346827U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a kind of comprehensive foundation pit supporting constructions, including soil nail wall sloping timbering structure and Larsen steel sheet pile supporting construction, the soil nail wall sloping timbering structure setting is on the upper ramps side wall of foundation pit, the soil nail wall sloping timbering structure includes the soil cement anchoring pile that point multilayer is uniformly arranged on excavation slope and injection concrete face slab, and the free end of the soil cement anchoring pile is connected with injection concrete face slab;The Larsen steel sheet pile supporting construction is the steel sheet pile enclosure structure that the mutual snapping of steel sheet pile of lower part to projected depth that foundation pit is embedded in by several forms closing foundation pit, the top of the steel sheet pile enclosure structure is also evenly arranged with several reaming anchor cable structures, the top of the steel sheet pile is equipped with crown beam along the peripheral direction of foundation pit, and the free end of the reaming anchor cable structure is anchored at the top of steel sheet pile enclosure structure behind the top of steel sheet pile and crown beam.The utility model provides one kind both convenient for construction operation, and stable structure is reliable, cost and low foundation pit comprehensive support structure.

Description

Foundation pit comprehensive support structure
Technical field
The utility model relates to technical field of civil engineering, more specifically, it relates to a kind of comprehensive pattern foundation pit supporting structure Structure.
Background technique
Due to the southeastern coastal areas, belongs to strand and rush marine plain, although surface relief is little, place is relatively flat, It is the medium complexity of earth formation in place, surface layer is artificial earth fill;Middle part is the 4th system sea product genetic stratigraphy and rushes proluvial deposit; Lower part is geochemistry of Yanshanian granitoids and its weathered layer.To the more demanding of pattern foundation pit supporting structure when therefore constructing, prior art Central Plains is more It is the case where being easy to happen foundation pit deformation, especially eastern using soil nailing wall structure supporting, but since the geological condition of southeastern coast is special The coastal weather in south is larger by typhoon influence, if chance day after day harass by heavy rain or Heavy Rain of Typhoon, foundation pit collapse accident happens occasionally, therefore It is badly in need of proposing the new foundation pit comprehensive support structure of one kind to solve this problem.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of both convenient for construction operation, and stable structure is reliable, Cost and low foundation pit comprehensive support structure.
A kind of foundation pit comprehensive support structure, including soil nail wall sloping timbering structure and Larsen steel sheet pile supporting construction, it is described For soil nail wall sloping timbering structure setting on the upper ramps side wall of foundation pit, the soil nail wall sloping timbering structure includes dividing multilayer The soil cement anchoring pile and injection concrete face slab being uniformly arranged on excavation slope, the free end and jetting cement face of the soil cement anchoring pile Plate is connected;The Larsen steel sheet pile supporting construction is that the lower part of foundation pit is embedded in by several to the steel sheet pile phase of projected depth Mutual snapping forms the steel sheet pile enclosure structure of closing foundation pit, and the top of the steel sheet pile enclosure structure is also evenly arranged with several expansions The top of hole anchor cable structure, the steel sheet pile is equipped with crown beam, the free end of the reaming anchor cable structure along the peripheral direction of foundation pit The top of steel sheet pile enclosure structure is anchored at behind the top of steel sheet pile and crown beam.
Further, the soil nail wall sloping timbering structure includes dividing three layers to be uniformly arranged on soil cement anchor on excavation slope Stake, the length of the third layer soil cement anchoring pile is longer than first and second layer of soil cement anchoring pile, and the soil cement anchoring pile includes anchor The side wall of tube end locking mechanism, anchor tube and shoe, one end on the anchor tube close to shoe is laid with hangnail with quincunx, It is additionally provided with slurry leakage hole below thorn, the Grouting Pipe for leading to stake holes bottom is additionally provided in anchor tube, the anchor tube is logical while construction It crosses Grouting Pipe and carries out slip casting into anchor tube.
Further, the shoe of the soil cement anchoring pile is the pointed drill header structure that cross is welded by the steel plate of 6mm thickness.
Further, anchor tube end lock mechanism includes locking muscle and reinforcing rib, and the anchor tube passes through jetting cement face It is successively mutually integrally welded by anchor tube side wall and locking muscle, reinforcing rib and slab reinforcement layer after the slab reinforcement layer of plate.
Further, the steel sheet pile be using two sides the mutual snapping in end after by oscillatory type steel sheet pile machine by root Successively inserting piling surrounds closed steel sheet pile enclosure structure.
Further, the reaming anchor cable structure is made of disposable drill bit, high-pressure rotary-spray cement soil pile and anchor cable, anchor Suo Caiyong prestressed concrete steel strand wires are fixedly mounted in drilling, and the head of anchor cable connects disposable drill bit, and tail portion passes through anchor Tool locking;Pass through high-pressure rotary-spray cement of the Grouting Pipe in drilling to formation calabash shaped after the hole wall high pressure jet grouting of drilling again Native pile body.
Further, the anchor cable of the reaming anchor cable structure include anchorage, billet, anchor tiltedly hold in the palm, prestressed concrete steel Twisted wire and fixed frame, prestressed concrete steel strand wires include free segment steel strand wires and anchoring section steel strand wires, and the free segment steel twists The surface applied with two passes antirust paint and grease of line are simultaneously arranged PE pipe, the anchoring section steel on surface using after three plastic wraps Twisted wire is without package steel strand wires;The head of the anchoring section steel strand wires connects the tail portion of disposable drill bit, and the free segment steel twists The tail portion of line passes sequentially through that anchor is tiltedly held in the palm, billet, anchorage fixing lock are in the top of steel sheet pile enclosure structure, the prestressed concrete Native steel strand is fixedly mounted in drilling by fixed frame.
Further, the disposable drill bit includes three leaf steel bits, steel pipe and anchor plate, the three leaves steel bit It is fixedly mounted on the head of steel pipe, the tail portion of steel pipe and drilling rod assemble, and the middle part of steel pipe passes through anchor plate and prestressed concrete Steel strand wires are connected, and the head of steel pipe is additionally provided with extravasating hole.
Further, the section of the crown beam is the symmetrical structure of inverted U, and the top of the steel sheet pile is embedded in crown beam Between groove part, and be also reserved with inside crown beam the anchor cable pipeline of reaming anchor cable structure, the reaming anchor cable structure Anchor cable is tiltedly held in the palm by anchorage, billet, anchor after tensioning and anchors the side wall for being locked at crown beam.
Further, the foundation pit comprehensive support structure is all distinguished on foundation pit top surface and foundation pit cushion cap bed course bottom plane Equipped with gutter, the gutter inner side edge of foundation pit top surface is additionally provided with guard rail.
Further, the soil nail wall sloping timbering structure is additionally provided with several tapping pipes, the sluicing on excavation slope Pipe is made of two layers of geotextiles of pvc pipe outsourcing, and pipe shaft offers the aperture of quincunx laying, and one end of the tapping pipe enters side In the soil layer on slope, the other end is through the outer surface for going out injection concrete face slab.
In conclusion the invention has the following advantages: the present invention passes through soil nail wall sloping timbering structure and Larsen steel The comprehensive support system of sheet pile supporting construction composition, can be effectively prevented side slope and collapse, while by dewatering ditch and let out The effect of water pipe may be implemented the infiltration and draining of all the period of time, further prevent the special geology in the southeastern coastal areas gentle Time condition, the case where preventing foundation pit deformation, the weather of especially southeastern coast is larger by typhoon influence, if meet heavy rain day after day or Heavy Rain of Typhoon is harassed, and can also be prevented the deformation of foundation pit caused by mud and side slope in time, be prevented Important Project accident.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of the utility model foundation pit comprehensive support structure.
Fig. 2 is the structural schematic diagram of the reaming anchor cable structure of the utility model.
Fig. 3 is the structural schematic diagram of the anchor cable of reaming anchor cable structure in Fig. 2.
Fig. 4 is the enlarged structure schematic diagram of the Section A-A in Fig. 3.
Fig. 5 is the enlarged structure schematic diagram in the section B '-B ' in Fig. 3.
Fig. 6 is the enlarged structure schematic diagram of the section B-B in Fig. 3.
Fig. 7 is the structural schematic diagram of the disposable drill bit of reaming anchor cable structure in Fig. 2.
Fig. 8 is the structural schematic diagram of the soil cement anchoring pile of the soil nail wall sloping timbering structure of the utility model.
Fig. 9 is the A node enlarged structure schematic diagram of soil cement anchoring pile in Fig. 8.
Figure 10 is the B node enlarged structure schematic diagram of soil cement anchoring pile in Fig. 8.
Figure 11 is the C node enlarged structure schematic diagram of soil cement anchoring pile in Fig. 8.
Figure 12 is the enlarged structure schematic diagram in the section D-D of soil cement anchoring pile in Fig. 8.
Figure 13 is the structural schematic diagram of the tapping pipe of the utility model.
Figure 14 is the structural schematic diagram of the crown beam of the utility model.
Figure 15 is multiple splicing construction schematic diagrames of the steel sheet pile of the utility model.
Specific embodiment
In order to be preferably illustrated to the utility model, elaborate below in conjunction with attached drawing.
As shown in Figure 1, being a kind of diagrammatic cross-section of foundation pit comprehensive support structure described in the utility model, including soil nailing The top of foundation pit 3 is arranged in wall sloping timbering structure 1 and Larsen steel sheet pile supporting construction 2, the soil nail wall sloping timbering structure 1 On sloped sidewall, the soil nail wall sloping timbering structure 1 includes that point multilayer is uniformly arranged on the soil cement anchoring pile on excavation slope 11 use the reinforcing bar of 8 150*150 of C20 gunite concrete and φ of 80mm thickness with injection concrete face slab 12, the injection concrete face slab 12 The free end of net composition, the soil cement anchoring pile 11 is connected with injection concrete face slab 12;
Such as Fig. 1, the Larsen steel sheet pile supporting construction 2 is that the lower part of foundation pit 3 is embedded in by several to projected depth The mutual snapping of steel sheet pile 21 forms the steel sheet pile enclosure structure of closing foundation pit 3, and the top of the steel sheet pile enclosure structure 2 is also uniform Several reaming anchor cable structures 23 are provided with, the top of the steel sheet pile 21 is equipped with crown beam 22, the expansion along the peripheral direction of foundation pit The free end of hole anchor cable structure 23 is anchored at the top of steel sheet pile enclosure structure behind the top of steel sheet pile 21 and crown beam 22. Such as Figure 14, the steel sheet pile 21 be after the mutual snapping in end 211 using two sides by oscillatory type steel sheet pile machine by root successively Inserting piling surrounds closed steel sheet pile enclosure structure.Such as Figure 14, the section of the crown beam 22 is the symmetrical structure of inverted U, the steel The groove part of the centre of the top insertion crown beam 22 of sheet pile 21, and reaming anchor cable structure 23 is also reserved with inside crown beam 22 Anchor cable pipeline 221, the anchor cable of the reaming anchor cable structure 23 after tensioning pass through anchorage 236, billet 238, the oblique support 239 of anchor It is locked at the side wall of crown beam 22.
Such as Fig. 2, the reaming anchor cable structure 23 is by disposable drill bit 231, high-pressure rotary-spray cement soil pile 232 and anchor cable 233 compositions, anchor cable 233 are fixedly mounted in drilling 235 using prestressed concrete steel strand wires 234, and the head of anchor cable 233 connects Disposable drill bit 231, tail portion are locked by anchorage 236;Pass through expansion of the Grouting Pipe 2351 in drilling 235 to drilling 235 again The end 6.5m length of the hole wall high-pressure rotary-spray cement injection 237 of head section, drilling is not whitewashed, and the high pressure rotation of calabash shaped is ultimately formed Water spray soil pile body 232.
Such as Fig. 3-6, the anchor cable 233 of the reaming anchor cable structure 23 includes anchorage 236, billet 238, the oblique support 239 of anchor, pre- Prestressed concrete steel strand wires 230 and fixed frame 240, prestressed concrete steel strand wires 230 include free segment steel strand wires 2301 and anchor Gu section steel strand wires 2302, the surface applied with two passes antirust paint and grease of the free segment steel strand wires 2301 and using three plastics It is arranged PE pipe on surface after package, the anchoring section steel strand wires 2302 are without package steel strand wires;The anchoring section steel strand wires 2302 Head connect the tail portion of disposable drill bit 231, the tail portion of the free segment steel strand wires 2301 passes sequentially through the oblique support 239 of anchor, steel At the top of steel sheet pile enclosure structure, the prestressed concrete steel twists 230 and passes through fixed frame for backing plate 238,236 fixing lock of anchorage 240 are fixedly mounted in drilling 235.
Such as Fig. 7, the disposable drill bit 231 includes three leaf steel bits 2311, steel pipe 2312 and anchor plate 2313, described Three leaf steel bits 2311 are fixedly mounted on the head of steel pipe 2312, and the tail portion of steel pipe 2312 and drilling rod assemble, steel pipe 2312 Middle part is connected by anchor plate 2313 with prestressed concrete steel strand wires 230, and the head of steel pipe 2312 is additionally provided with extravasating hole 2314。
Such as Fig. 1 and Fig. 8-12, the soil nail wall sloping timbering structure 1 includes dividing three layers to be uniformly arranged on excavation slope Soil cement anchoring pile 11 in drilling 10, the length of the third layer soil cement anchoring pile are 15m, first and second layer of soil cement anchoring pile It is set as 12m, the soil cement anchoring pile 11 includes anchor tube end lock mechanism 111, anchor tube 112 and shoe 113, the anchor tube The side wall of one end on 112 close to shoe 113 is laid with hangnail 1121 with quincunx, and the lower section of hangnail 1121 is additionally provided with slurry leakage hole 1122, the Grouting Pipe 1123 for leading to stake holes bottom is additionally provided in anchor tube 112, the anchor tube 112 passes through slip casting while construction Pipe 1123 carries out slip casting into anchor tube 112, and cement slurry can be made to flow outwardly by Grouting Pipe 1123 and slurry leakage hole 1122 Inside 112 outer wall of anchor tube to drilling 10, wrap up the outside of anchor tube 112 by mortar completely.Soil cement anchoring pile 11 as described in Figure 11 Shoe 113 be the pointed drill header structure that cross is welded by the steel plate of 6mm thickness.Such as Fig. 9, anchor tube end lock mechanism 111 Including locking muscle 1111 and reinforcing rib 1112, the anchor tube 112 passes through anchor tube after passing through the slab reinforcement layer for spraying concrete face slab 12 112 side walls and locking muscle 1111, reinforcing rib 1112 and slab reinforcement layer are successively mutually integrally welded.
Such as Fig. 1, the foundation pit comprehensive support structure is all divided in 32 plane of foundation pit top surface 31 and foundation pit cushion cap bed course bottom Not She You gutter 311,311 inner side edge of gutter of foundation pit top surface is additionally provided with protective fence 312.The soil nail wall sloping timbering knot Structure is additionally provided with several tapping pipes 13 on excavation slope, and such as Figure 13, the tapping pipe uses two layers of geotextiles 131 of pvc pipe outsourcing It is made, pipe shaft offers the aperture 132 of quincunx laying, and one end of the tapping pipe 13 enters in the soil layer of side slope, and the other end passes through It is pierced by the outer surface of injection concrete face slab 12.
Above-mentioned specific embodiment is not construed as further limiting the utility model, those skilled in the art according to The unsubstantiality change that the content of the present invention is made should all be fallen into scope of protection of the utility model.

Claims (10)

1. a kind of foundation pit comprehensive support structure, it is characterised in that: including soil nail wall sloping timbering structure and Larsen steel sheet pile supporting Structure, the soil nail wall sloping timbering structure setting is on the upper ramps side wall of foundation pit, the soil nail wall sloping timbering structure Soil cement anchoring pile and injection concrete face slab, the free end of the soil cement anchoring pile and spray on excavation slope are set including point multilayer Concrete face slab is penetrated to be connected;The Larsen steel sheet pile supporting construction is that the lower part of foundation pit is embedded in by several to the steel of projected depth The mutual snapping of sheet pile forms the steel sheet pile enclosure structure of closing foundation pit, and the top of the steel sheet pile enclosure structure is also evenly arranged with The top of several reaming anchor cable structures, the steel sheet pile is equipped with crown beam along the peripheral direction of foundation pit, the reaming anchor cable structure Free end is anchored at the top of steel sheet pile enclosure structure behind the top of steel sheet pile and crown beam.
2. foundation pit comprehensive support structure according to claim 1, it is characterised in that: the soil nail wall sloping timbering structure packet It includes points three layers and is uniformly arranged on soil cement anchoring pile on excavation slope, the length of soil cement anchoring pile is than first and second layer described in third layer Soil cement anchoring pile it is longer, the soil cement anchoring pile includes anchor tube end lock mechanism, anchor tube and shoe, close on the anchor tube The side wall of one end of shoe is laid with hangnail with quincunx, and slurry leakage hole is additionally provided with below hangnail, is additionally provided in anchor tube and leads to stake The Grouting Pipe of hole bottom, the anchor tube carry out slip casting into anchor tube by Grouting Pipe while construction.
3. foundation pit comprehensive support structure according to claim 2, it is characterised in that: the shoe of the soil cement anchoring pile be by The steel plate of 6mm thickness is welded into the pointed drill header structure of cross.
4. foundation pit comprehensive support structure according to claim 1, it is characterised in that: anchor tube end lock mechanism includes Muscle and reinforcing rib are locked, the anchor tube passes through anchor tube side wall and locking muscle after passing through the slab reinforcement layer for spraying concrete face slab, reinforces Muscle and slab reinforcement layer are successively mutually integrally welded.
5. foundation pit comprehensive support structure according to claim 1, it is characterised in that: the steel sheet pile is using two sides By oscillatory type steel sheet pile machine, by root, successively inserting piling surrounds closed steel sheet pile enclosure structure after the mutual snapping in end.
6. foundation pit comprehensive support structure according to claim 1, it is characterised in that: the reaming anchor cable structure is by disposable Drill bit, high-pressure rotary-spray cement soil pile and anchor cable composition, anchor cable are pacified using prestressed concrete steel strand wires by the way that isolating frame is fixed In drilling, the head of anchor cable connects disposable drill bit, and tail portion is locked by anchorage;Pass through the Grouting Pipe in drilling again to brill The high-pressure rotary-spray cement soil pile of calabash shaped is formed after the hole wall high pressure jet grouting in hole.
7. foundation pit comprehensive support structure according to claim 6, it is characterised in that: the anchor cable packet of the reaming anchor cable structure Include anchorage, billet, anchor tiltedly hold in the palm, prestressed concrete steel strand wires and fixed frame, prestressed concrete steel strand wires include free segment Steel strand wires and anchoring section steel strand wires, the surface applied with two passes antirust paint and grease of the free segment steel strand wires are simultaneously moulded using three It is arranged PE pipe on surface after material package, the anchoring section steel strand wires are without package steel strand wires;The head of the anchoring section steel strand wires Connect the tail portion of disposable drill bit, the tail portion of the free segment steel strand wires passes sequentially through that anchor is tiltedly held in the palm, billet, anchorage fixing lock exist The top of steel sheet pile enclosure structure, the prestressed concrete steel strand are fixedly mounted in drilling by fixed frame.
8. foundation pit comprehensive support structure according to claim 6, it is characterised in that: the disposable drill bit includes three leaf steel Drill bit, steel pipe and anchor plate processed, the three leaves steel bit are fixedly mounted on the head of steel pipe, and the tail portion of steel pipe and drilling rod fill Match, the middle part of steel pipe is connected by anchor plate with prestressed concrete steel strand wires, and the head of steel pipe is additionally provided with extravasating hole.
9. foundation pit comprehensive support structure according to claim 1, it is characterised in that: the section of the crown beam is inverted U Symmetrical structure, the groove part of the centre of the top insertion crown beam of the steel sheet pile, and reaming is also reserved with inside crown beam The anchor cable pipeline of anchor cable structure, the anchor cable of the reaming anchor cable structure tiltedly ask anchoring to lock after tensioning by anchorage, billet, anchor Tightly in the side wall of crown beam.
10. foundation pit comprehensive support structure according to claim 1, it is characterised in that: the soil nail wall sloping timbering structure Several tapping pipes are additionally provided on excavation slope, the tapping pipe is made of two layers of geotextiles of pvc pipe outsourcing, and pipe shaft offers One end of the aperture of quincunx laying, the tapping pipe enters in the soil layer of side slope, and the other end is through the appearance for going out injection concrete face slab Face.
CN201820881733.4U 2018-06-07 2018-06-07 Foundation pit comprehensive support structure Expired - Fee Related CN208346827U (en)

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CN201820881733.4U CN208346827U (en) 2018-06-07 2018-06-07 Foundation pit comprehensive support structure

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Application Number Priority Date Filing Date Title
CN201820881733.4U CN208346827U (en) 2018-06-07 2018-06-07 Foundation pit comprehensive support structure

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112695775A (en) * 2020-12-25 2021-04-23 中铁建工集团有限公司 Auxiliary assembly is used in highway's cutting construction
CN113174958A (en) * 2021-03-24 2021-07-27 上海宝冶集团有限公司 Construction method for foundation pit of adjacent road under poor ground condition
CN113202110A (en) * 2021-04-11 2021-08-03 中铁六局集团有限公司 Construction method for supporting and protecting finite space railway bridge and culvert prefabricated foundation pit
CN115198762A (en) * 2022-07-22 2022-10-18 中建一局集团第二建筑有限公司 Supporting structure next to existing building foundation pit and construction method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112695775A (en) * 2020-12-25 2021-04-23 中铁建工集团有限公司 Auxiliary assembly is used in highway's cutting construction
CN112695775B (en) * 2020-12-25 2022-03-04 中铁建工集团有限公司 Auxiliary assembly is used in highway's cutting construction
CN113174958A (en) * 2021-03-24 2021-07-27 上海宝冶集团有限公司 Construction method for foundation pit of adjacent road under poor ground condition
CN113202110A (en) * 2021-04-11 2021-08-03 中铁六局集团有限公司 Construction method for supporting and protecting finite space railway bridge and culvert prefabricated foundation pit
CN115198762A (en) * 2022-07-22 2022-10-18 中建一局集团第二建筑有限公司 Supporting structure next to existing building foundation pit and construction method thereof

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Granted publication date: 20190108