CN202227350U - Soil nailing wall made of fully-threaded fiber resin rods - Google Patents

Soil nailing wall made of fully-threaded fiber resin rods Download PDF

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Publication number
CN202227350U
CN202227350U CN2011203234900U CN201120323490U CN202227350U CN 202227350 U CN202227350 U CN 202227350U CN 2011203234900 U CN2011203234900 U CN 2011203234900U CN 201120323490 U CN201120323490 U CN 201120323490U CN 202227350 U CN202227350 U CN 202227350U
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CN
China
Prior art keywords
rod
soil nailing
soil
full thread
resin body
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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CN2011203234900U
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Chinese (zh)
Inventor
李哲琳
倪晓荣
米厚天
朱继永
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XINXING BUILDING DEVELOPMENT GENERAL Co CHINA
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XINXING BUILDING DEVELOPMENT GENERAL Co CHINA
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Priority to CN2011203234900U priority Critical patent/CN202227350U/en
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Publication of CN202227350U publication Critical patent/CN202227350U/en
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Abstract

The utility model relates to a soil nailing wall made of fully-threaded fiber resin rods. Soil nailing rods of the soil nailing wall are fully-threaded fiber resin rods, an auxiliary reinforcing rib is arranged on the upper portion of a section of each fully-threaded fiber resin rod positioned in a concrete pavement, an elongated transverse pressure rib is arranged on the lower portion of the section of the same fully-threaded fiber resin rod, screwing nuts are resin nuts, underboardings are resin underboardings infused by resin materials and closely attached to the outer surface of the concrete pavement, and annular positioners are sleeved on the section of each fully-threaded fiber resin rod extending into a side slope soil body at intervals. Compared with an existing soil nailing wall, the soil nailing wall is simple and convenient in construction, energy-saving and consumption-reducing, the resin rods are wider in application range, and the nuts and the underboardings at the ends of the rods are positioned outside the concrete pavement so that stress is more reasonable. Besides, each rod can be provided with an expansion head according to practical needs, so that a reinforced expansion head soil nail is formed, and plasticity is high. The soil nailing wall is widely applicable to construction of side slope soil nailing wall technology.

Description

Full thread fibre resin body of rod soil nailing wall
Technical field
The utility model relates to a kind of soil nailing wall, and is particularly a kind of with the soil nailing wall of full thread resin body of rod replacement reinforcing bar as soil nailing master muscle.
Background technology
In foundation pit supporting project, soil-nail wall support is a support pattern comparatively commonly used, and soil nailing generally selects for use screw-thread steel as soil nailing master muscle, and the horizontal beading of soil nailing master muscle and surface layer, steel mesh reinforcement are taked to be welded to connect, then the sprayed mortar surface layer.There is following shortcoming in this support system: (one) was lost efficacy owing to the soil nailing reinforcing bar corrodes easily; (2) the processing body of rod, concrete surface layer need adopt welding procedure; (3) the soil nailing anchor head places in the thick concrete pavement of 8 ~ 10cm, can not give full play to the common stressed effect of concrete pavement and anchor head; (4) the reinforcing bar soil nailing that is embedded in the soil layer has formed obstacle in later stage tunnel engineering slot grooving, also be unfavorable for economizing on resources simultaneously, has increased difficulty of construction and disposal cost.
The utility model content
The purpose of the utility model provides a kind of full thread fibre resin body of rod soil nailing wall, solve existing soil nailing wall easy-to-rust, and life cycle is short, and follow-up tunnel slot grooving difficulty is stressed greatly, irrational technical problem.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of full thread fibre resin body of rod soil nailing wall comprises slope soil, is sprayed by concrete grout to form concrete pavement and soil nailing; Said soil nailing comprises the body of rod, backing plate and the nut of screwing, and the said body of rod inserts in the slope soil, is marked with bar periphery slurry in the slit between itself and the slope soil; Said body of rod outer end is through the nut screwing clamping of screwing, and said backing plate pad is being screwed between nut and the concrete pavement, and said slope soil external surface is laid with steel mesh reinforcement; Said concrete pavement parcel steel mesh reinforcement; The said body of rod is the full thread fibre resin body of rod, and it is positioned at concrete pavement inner section top and is provided with auxiliary reinforcing rib, and the bottom is provided with elongated horizontal beading; The said nut of screwing is the resin nut; Said backing plate is the ribbing type resin backing plate that resin material forms, and it is close to the external surface of concrete pavement, and the said full thread fibre resin body of rod is positioned at the slope soil bore portion and is jacketed with the circular orientation device.
What the said full thread fibre resin body of rod was positioned at slope soil hole part is equipped with enlarged footing near end portion, and said enlarged footing is formed by folder steel annulus between a pair of binding nut.
The said full thread fibre resin body of rod exposes slope soil and is no less than 20cm.
Diameter >=the 18mm of the said full thread fibre resin body of rod.
The length of said auxiliary reinforcing rib is no less than 25cm.
Said auxiliary reinforcing rib and horizontal beading are symmetrical set about the soil nailing body of rod, and are that one is connected with the steel mesh reinforcement colligation all.
Said ribbing type resin backing plate is that outer shroud and the inner axle heart overlap that staggered floor is nestable to form, and links the rib drawknot through what be provided with at interval between said outer shroud and the interior ring, said in the internal diameter of ring equate with the external diameter of the full thread fibre resin body of rod.　?　
Compared with prior art the utlity model has following characteristics and beneficial effect:
The soil nailing body of rod, nut and the backing plate of the utility model are resin material; Compare with the reinforcing bar soil nailing; It has cutting, anticorrosive, the characteristics such as tensile strength is high, in light weight, anti-electromagnetism, cost are low of being prone to; Can need not under the normal condition to carry out secondary operations according to designing requirement directly in producer's machine-shaping, saved spent thus electric energy, five metals, machinery expense and labour cost etc.Simultaneously full thread fibre resin body of rod soil nailing is easy to cutting, and does not produce spark at cutting process, has avoided disaster hidden-trouble, also is applicable to the excavation and the ram machine construction in later stage tunnel, has avoided armful, the phenomenon of card mechanical drilling rod, greatly reduces disposal cost.Full thread fibre resin body of rod soil nailing has the height rotproofness, can keep stable performance for a long time, does not corrode, and more can satisfy the long-term requirement of using under wet environment.
The said full thread fibre resin of the utility model body of rod soil nailing wall technology soil nailing head pad crab bolt is positioned at the surface layer outside; Stressed more reasonable, through applying screwing force, backing plate is contacted closely with concrete pavement; Thereby soil nailing and concrete pavement are played one's part to the full, effectively control slope displacement.
The enhancement mode soil nailing end of the said soil nailing wall of the utility model is provided with the annulus enlarged footing, and two locks with nut, thereby guarantees the bond stress between the body of rod and the cement paste, improves the soil nailing bearing capacity, realizes the better application of soil nailing wall in the relatively poor soil body of soil property.The utility model can be widely used in the upper side slope supporting.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
Fig. 1 is the utility model structural representation.
Fig. 2 is the detail drawing figure of A place of Fig. 1.
Fig. 3 is an enhancement mode soil nailing structure chart.
Fig. 4 is a soil nailing wall elevation.
Fig. 5 is horizontal beading and auxiliary reinforcing rib relative position relation figure.
Fig. 6 is a ribbing type resin backing plate detail drawing.
Fig. 7 is the utility model construction process figure.
Reference numeral: ring, 7.3-link rib, 8-bar periphery slurry, 9-concrete pavement, 10-slope soil in 1-soil nailing, the 1.1-full thread fibre resin body of rod, 1.2-resin nut, 2-enlarged footing, 2.1-binding nut, 2.2-steel annulus, 3-circular orientation device, 4-steel mesh reinforcement, the auxiliary reinforcing rib of 5-, the horizontal beading of 6-, 7-ribbing type resin backing plate, 7.1-outer shroud, the 7.2-.
The specific embodiment
Embodiment is referring to Fig. 1, Fig. 2 and shown in Figure 4, and a kind of full thread fibre resin body of rod soil nailing wall comprises slope soil 10; Form concrete pavement 9 and soil nailing 1 by the concrete grout injection, said soil nailing 1 comprises the body of rod, backing plate and the nut of screwing, and the said body of rod inserts in the slope soil 10; Be marked with bar periphery slurry 8 in the hole between itself and the slope soil 10; With fixing backing plate, said backing plate pad is being screwed between nut and the concrete pavement 9 through the nut screwing clamping of screwing in said body of rod outer end, and said slope soil 10 external surfaces are laid with steel mesh reinforcement 4; Said concrete pavement 10 parcel steel mesh reinforcements 4; It is characterized in that: the said body of rod is the full thread fibre resin body of rod 1.1, and it is positioned at concrete pavement 9 inner section tops and is provided with auxiliary reinforcing rib 5, and the bottom is provided with elongated horizontal beading 6; The said nut of screwing is a resin nut 1.2; Said backing plate is the ribbing type resin backing plate 7 that resin material forms, and it is close to the external surface of concrete pavement 9, and the said full thread fibre resin body of rod 1.1 is positioned at slope soil hole part and is jacketed with circular orientation device 3.The said full thread fibre resin body of rod 1.1 exposes slope soil 10 and is no less than 20cm.Diameter >=the 18mm of the said full thread fibre resin body of rod 1.1.
Wherein, the soil nailing of band enlarged footing is referring to Fig. 3, and what the said full thread fibre resin body of rod 1.1 stretched into slope soil 10 sections installs enlarged footing 2 near end portion, and said enlarged footing 2 is formed by folder steel annulus 2.2 between a pair of binding nut 2.1.
Wherein, reinforcement placement is referring to Fig. 5, and said auxiliary reinforcing rib 5 is symmetrical set about the soil nailing body of rod with horizontal beading 6, and is that one is connected with steel mesh reinforcement 4 colligations all.The length of said auxiliary reinforcing rib 5 is no less than 25cm.
Wherein, The concrete shape of ribbing type resin backing plate 7 is referring to Fig. 6; The axis coinciding staggered floor is nestable forms for outer shroud 7.1 and interior ring 7.2 for said ribbing type resin backing plate 7; Link rib 7.3 drawknots through what be provided with at interval between said outer shroud 7.1 and the interior ring 7.2, said in the internal diameter of ring 7.2 equate with the external diameter of the full thread fibre resin body of rod 1.1.
The job practices of above-mentioned full thread fibre resin body of rod soil nailing wall, referring to Fig. 7, concrete steps are following:
Step 1, excavated surface on slope soil 10, and repair domatic; Plate brad supporting should progressively excavate by the gradient of design code, prevents to backbreak or owes and dig, and in time repair side slope.Before the supporting of not accomplishing the step scope of operation, must not carry out next layer depth excavation.When the foundation ditch area is big, allows the foundation ditch middle part of side slope 8～10m around distance freely to excavate, but should note coordinating mutually with the excavation in stratified operation district.Domatic should be smooth, before domatic concrete spraying support, should remove domatic loosened soil, and control the gradient well;
Step 2 is confirmed the position, hole of soil nailing 1 through measuring unwrapping wire;
Step 3, manual work or mechanical hole building; The facility that the soil nailing pore-forming adopts should be fit to the characteristics of soil layer, should adopt the rig pore-forming when in the soil body in the hole of collapsing easily, holing;
Step 4 after inspection hole depth, aperture, body of rod length are qualified, in time insert extremely 250mm～500mm place at the bottom of the hole of the body of rod and Grouting Pipe, and plug-hole is annotated bar periphery slurry 8 in the hole.The every along its length interval 2.0m of the soil nailing body of rod is provided with a locator, and interior ring diameter is decided according to body of rod diameter, makes soil nailing occupy the anchor hole center, and the locator material can adopt resin material.Reserve 20cm length at the place, aperture behind the body of rod hand-hole and carry section as pallet; Should note following problem during slip casting in the hole: (a) should assorted soil residual or loosening in the hole be removed totally before the slip casting, low-pressure grouting mode, the about 0.4～0.6Mpa of pressure are adopted in slip casting.Slip casting begins or Halfway Stopping when surpassing 30min, answers lubricated grouting pump of water or cement water grout and pipeline thereof; (b) for horizontal drilling, adopt slip casing by pressure, the about 1～2Mpa of pressure, Grouting Pipe generally to be inserted at the bottom of the hole, before slip casting, send in the hole simultaneously with the soil nailing body of rod; (c) injecting paste material should be selected cement paste or cement mortar for use; The water/binder ratio of cement paste is preferably 0.5, and cement mortar mix ratio is preferably 1.1～1.2 (weight ratios), and water/binder ratio is preferably 0.38～0.45; When remaking industry before beginning slip casting or after resting, palpus water flushing line; (d) during slip casting, the position, aperture should be provided with stop grouting plug and stack; It is each that actual grouting amount must be above the volume in hole during slip casting in the hole; Relatively poor like soil layer property, conventional soil nailing way can not guarantee soil nailing tension bearing capacity, can take the bearing capacity enhancement measures, simultaneously install near end portion enlarged footing 2 again with hand-hole under the body of rod in and slip casting;
Step 5 is at slope soil 10 external surface colligations, fixedly steel mesh reinforcement 4, horizontal beading 6 and auxiliary reinforcing rib 5;
Step 6, sprayed mortar forms concrete pavement 9, surface layer is located in the aperture scraped floating whole; This operation is noted following problem in implementation process: (A) spray preceding at the domatic sprayed mortar thickness mark of doing; (B) reinforcing bar of φ 6.5 is weaved into the net sheet, fix with the reinforcing bar that inserts in the soil.Reinforced mesh all should overlap with top, gives step toothing down, and the steel mesh reinforcement lap length should be not less than a grid length of side; (C) the soil nailing front end is provided with an elongated horizontal beading below the body of rod, and the top is provided with an auxiliary reinforcing rib that about 25cm is long, and keeps the body of rod placed in the middle; See Fig. 5 .1.2; Beading is selected the screw-thread steel of diameter of phi more than 14 for use, and firm with the reinforced mesh colligation, with the steel concrete surface layer that guarantees the soil nailing front end enough intensity is arranged; Can bear the screwing force that fastening nut applies, and stress distribution is uniformly diffused to whole steel concrete surface layer; (D) penetrating apart from should be in 0.6～1.0m scope of sprayed mortar, and spray from top to bottom, jet direction should vertically point to jet face, should spray earlier at the reinforcing bar position and fill out the reinforcing bar rear, and the place ahead is filled out in spray then, prevents the space to occur at the reinforcing bar back side; (E) when sprayed mortar thickness surpasses 120mm, should divide secondary injection, each jet thickness is preferably 50～70mm.Instantly before going on foot sprayed mortar, should carefully remove the laitance layer of reserving on the constuction joint mating face, and water spray makes it moist; (F) concrete pavement of soil nailing front end should be scraped floating wholely, before the facing concrete initial set, backing plate is pressed into surface layer contact closely, in case of necessity should be between backing plate and concrete pavement the backfilling cement mortar, fully contact with concrete pavement with the assurance backing plate;
Step 7 is pressed into ribbing type resin backing plate with concrete pavement before the initial set of sprayed mortar surface layer and contacts closely, and full thread fibre resin body of rod outer end guarantees that through the resin nut screwing clamping of screwing ribbing type resin backing plate presses firmly; For preventing that the backing plate and the body of rod from conditioning each other, when pressing, should guarantee by backing plate that the backing plate and the body of rod are orthogonal, nut should be tightened more than 8 buttons, guarantees that full thread fiber-reinforced resin body of rod soil nailing has the effect that initiatively retrains sloping body deformability.Behind the nut screwing clamping, should the unnecessary body of rod that exceed nut end be amputated, stretch out the length of surface layer with the body of rod and be advisable with interior at 8cm～10cm;
Step 8, curing concrete surface layer 9 is prepared the excavation of bottom work plane, for preventing that anchor head from damaging soil nailing and losing efficacy, under when going on foot soil excavation, should notice that anchor head that protecting constructs finishes can make the concrete cap closure in case of necessity and expose anchor head.

Claims (7)

1. a full thread fibre resin body of rod soil nailing wall comprises slope soil (10), is sprayed by concrete grout to form concrete pavement (9) and soil nailing (1); Said soil nailing (1) comprises the body of rod, backing plate and the nut of screwing; The said body of rod inserts in the slope soil (10), is marked with bar periphery slurry (8) in the slit between itself and the slope soil (10), and said body of rod outer end is through the nut screwing clamping of screwing; Said backing plate pad is being screwed between nut and the concrete pavement (9); Said slope soil (10) external surface is laid with steel mesh reinforcement (4), said concrete pavement (10) parcel steel mesh reinforcement (4), and it is characterized in that: the said body of rod is the full thread fibre resin body of rod (1.1); It is positioned at concrete pavement (9) inner section top and is provided with auxiliary reinforcing rib (5); The bottom is provided with elongated horizontal beading (6), and the said nut of screwing is resin nut (1.2), and said backing plate is the ribbing type resin backing plate (7) that resin material forms; It is close to the external surface of concrete pavement (9), and the said full thread fibre resin body of rod (1.1) is positioned at the slope soil bore portion and is jacketed with circular orientation device (3).
2. full thread fibre resin body of rod soil nailing wall according to claim 1; It is characterized in that: what the said full thread fibre resin body of rod (1.1) was positioned at slope soil (10) hole part is equipped with enlarged footing (2) near end portion, and said enlarged footing (2) is formed by folder steel annulus (2.2) between a pair of binding nut (2.1).
3. full thread fibre resin body of rod soil nailing wall according to claim 1, it is characterized in that: the said full thread fibre resin body of rod (1.1) exposes slope soil (10) and is no less than 20cm.
4. full thread fibre resin body of rod soil nailing wall according to claim 1 is characterized in that: the diameter >=18mm of the said full thread fibre resin body of rod (1.1).
5. full thread fibre resin body of rod soil nailing wall according to claim 1, it is characterized in that: the length of said auxiliary reinforcing rib (5) is no less than 25cm.
6. full thread fibre resin body of rod soil nailing wall according to claim 1, it is characterized in that: said auxiliary reinforcing rib (5) and horizontal beading (6) are symmetrical set about the soil nailing body of rod, and are that one is connected with steel mesh reinforcement (4) colligation all.
7. full thread fibre resin body of rod soil nailing wall according to claim 1; It is characterized in that: said ribbing type resin backing plate (7) is outer shroud (7.1) and nestable the forming of interior ring (7.2) axis coinciding staggered floor; Link rib (7.3) drawknot through what be provided with at interval between said outer shroud (7.1) and the interior ring (7.2), said in the internal diameter of ring (7.2) equate with the external diameter of the full thread fibre resin body of rod (1.1).
CN2011203234900U 2011-08-31 2011-08-31 Soil nailing wall made of fully-threaded fiber resin rods Expired - Fee Related CN202227350U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN2011203234900U CN202227350U (en) 2011-08-31 2011-08-31 Soil nailing wall made of fully-threaded fiber resin rods

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352630A (en) * 2011-08-31 2012-02-15 中国新兴建设开发总公司 Full-thread fiber resin rod body soil nailing wall and construction method thereof
CN106836245A (en) * 2017-02-27 2017-06-13 淮北宇鑫新型材料有限公司 A kind of soil nailed wall retaining structure and construction method
CN109958137A (en) * 2019-04-09 2019-07-02 山西省工业设备安装集团有限公司 A kind of reinforcement soil nailing facing wall and forming method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352630A (en) * 2011-08-31 2012-02-15 中国新兴建设开发总公司 Full-thread fiber resin rod body soil nailing wall and construction method thereof
CN106836245A (en) * 2017-02-27 2017-06-13 淮北宇鑫新型材料有限公司 A kind of soil nailed wall retaining structure and construction method
CN109958137A (en) * 2019-04-09 2019-07-02 山西省工业设备安装集团有限公司 A kind of reinforcement soil nailing facing wall and forming method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120523

Termination date: 20170831

CF01 Termination of patent right due to non-payment of annual fee