CN204919546U - But recovery type soil nail - Google Patents

But recovery type soil nail Download PDF

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Publication number
CN204919546U
CN204919546U CN201520662256.9U CN201520662256U CN204919546U CN 204919546 U CN204919546 U CN 204919546U CN 201520662256 U CN201520662256 U CN 201520662256U CN 204919546 U CN204919546 U CN 204919546U
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CN
China
Prior art keywords
soil nailing
soil
soil nail
nail
main body
Prior art date
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.)
Withdrawn - After Issue
Application number
CN201520662256.9U
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Chinese (zh)
Inventor
刘丽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Investigation Design and Research Institute Co Ltd SIDRI
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Shanghai Investigation Design and Research Institute Co Ltd SIDRI
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Priority to CN201520662256.9U priority Critical patent/CN204919546U/en
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Publication of CN204919546U publication Critical patent/CN204919546U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model provides a but recovery type soil nail, it includes but recovery type soil nail: soil nail follows closely the end, includes welded nail point, end plate and connecting pipe in proper order, be equipped with in the connecting pipe and seal the baffle, have the via hole on the baffle, have the external screw thread on the connecting pipe outer wall, pipy soil nail main part, soil nail main part save in proper order the screw by at least two soil nail and link to each other and constitute, and adjacent soil nail internode passes through the stop pin location, wherein one end the soil nail festival with the connecting pipe screw thread links to each other, has the external screw thread on the outer wall of all soil nail festivals, the slip casting pipe, the one end of slip casting pipe wears to establish seal the downthehole excessively of baffle, the other end of slip casting pipe is from whole wear out in the soil nail main part, outer tube, outer tube inner wall are equipped with the internal thread, and the outer tube passes through the thread bush and establishes in connecting pipe and the soil nail main part. The utility model discloses a sectional type structural style has realized that the soil nail in the narrow and small space retrieves.

Description

Recoverable soil nailing
Technical field
The utility model relates to Soil-Nailing Wall Structure field, particularly relates to a kind of recoverable soil nailing.
Background technology
Plate brad supporting is a kind of gear soil technology newly for building foundation pit and stability of slope, due to this process economics, reliable and construct quick, easy, is widely used at present.Plate brad supporting takes full advantage of the intensity of foundation soil itself, and the method arranging soil nailing by excavation soil body limit, limit reaches the object of supporting.In-situ test proterties is different from anchor pole, and anchor pole is generally provided with free segment and anchoring section, and the anchoring section stablized in the soil body by far-end provides larger uplift resistance.And soil nailing is general less relative to pulling force usually long and not suffered anchor pole, Normal practice adopts total length grouting in hole, and centre arranges a reinforcing bar, and injecting cement paste and reinforcing bar are bonded to a cylindric entirety to bear tension load, now, injecting cement paste and the equal tension of reinforcing bar.When side slope is excavated downwards, the soil body deforms, and makes soil nailing bear uplift resistance, thus the reinforcing side slope soil body.Soil nailing, at present as a kind of both economical pattern foundation pit supporting structure form, is usually used in shallow foundation hole, has been widely used, achieves good Social and economic benef@in the soft clay area such as coastal.But because soil nailing needs to penetrate the peripheral soil layer of pattern foundation pit supporting structure, usually run off red line, thus affect the construction of the outer adjacent building foundation of red line, underground construction, go out the biggest obstacle that red line has become the use of restriction soil nailing, and as have employed more expensive support form, then run counter to current advocated construction material-saving.Therefore, one is needed to avoid out red line and callable Soil-Nailing Wall Structure.
China Patent Publication No. CN202108052U discloses a kind of soil nailing that can complete recovery in building foundation pit supporting engineering after use.It is in rock, the soil body after pore-forming, in the cement injection body in hole, utilizes anchorage node that steel strand (or reinforcing bar) anchor is tight, thus completes the function of carrying.Be provided with safeties in anchorage node, between steel strand (or reinforcing bar) and injecting cement paste, be provided with separation sleeve, after a protective function completes, safeties can be opened, steel strand (or reinforcing bar) and ground tackle are separated, steel strand (or reinforcing bar) is pulled out the soil body, completes recovery.A soil nailing can arrange multiple anchorage node, and the anchorage node being positioned at diverse location can adjust distortion and the stressing conditions of steel strand (or reinforcing bar) by the brute spring of its inside, by endpoint node, play anchorage effect successively to intermediate node.This technical pattern is more complicated, makes in-situ test owing to mutually being limited by multiple anchorage node, and power transmission is not very clear and definite, cannot to soil nailing cement slurry Shi Hanzhang, and the body of rod needs when reclaiming the intermediate plate breaking through multiple node, reclaims and has larger difficulty.
Therefore, the soil nailing that a kind of structure is simple, be easy to reclaim use is needed.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of recoverable soil nailing, for solving the problem that nail Construction in prior art is limited and not easily reclaim.
For achieving the above object and other relevant objects, the utility model provides a kind of recoverable soil nailing, and it comprises:
Soil nailing nail end, comprise the nail tip, end plate and the tube connector that weld successively, packing plate is provided with in described tube connector, packing plate has via hole, tube connector outer wall has external screw thread, described end plate is provided with the first injected hole for being in the milk to nail tip place, and be connected with the described end plate sidewall of one end of described tube connector is provided with the second injected hole;
The soil nailing main body of tubulose, soil nailing main body saves screw thread successively by least two soil nailings and is connected and forms, and adjacent soil nailing internode is located by stop pin, and wherein the soil nailing joint of one end is connected with described tube connector screw thread, and the outer wall of all soil nailing joints has external screw thread; Grouting Pipe, one end of Grouting Pipe is located in the via hole of described packing plate, and the other end of Grouting Pipe passes in whole described soil nailing main body;
Outer tube, outer sleeve inner wall is provided with internal thread, and outer tube is located in described tube connector and soil nailing main body by thread bush.
Preferably, the end of the soil nailing joint of the described soil nailing main body other end is provided with the bolt for being connected with soil nail wall surface layer.
Preferably, the external diameter of described end plate is greater than the external diameter of described soil nailing main body.
Preferably, described nail tip is the taper nail tip of screw-type blade composition.
Preferably, described nail tip is cross nail tip.
As mentioned above, recoverable soil nailing of the present utility model, has following beneficial effect: adopt segmentation structure form, and the soil nailing achieved in small space reclaims; Adopt outer tube to be enclosed within the soil nailing main body of tubulose, and both screw threads are connected ensure that both are jointly stressed; After recovery, only there are outer tube, soil nailing nail end and cement-soil to stay in soil mass of foundation pit, achieve the recoverable of resource, the saving material of maximum possible, also eliminate the problem adopting soil nailing to affect follow-up adjacent area underground engineering construction simultaneously.
Accompanying drawing explanation
Fig. 1 is shown as the overall schematic of recoverable soil nailing of the present utility model.
Fig. 2 is shown as soil nailing of the present utility model nail end first embodiment schematic diagram.
Fig. 3 is shown as the structural representation of end plate of the present utility model.
Fig. 4 is shown as soil nailing of the present utility model nail end second embodiment schematic diagram.
Fig. 5 is shown as the structural representation of soil nailing of the present utility model joint.
Element numbers explanation
1 soil nailing nail end
11 nail tips
12 end plates
121 first injected holes
13 tube connectors
14 second injected holes
15 packing plates
151 via holes
2 soil nailing joints
21 connecting bolts
22 pin-and-holes
3 outer tubes
Detailed description of the invention
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar the content disclosed by this manual can understand other advantages of the present utility model and effect easily.
Refer to Fig. 1 to Fig. 5.Notice, structure, ratio, size etc. that this manual institute accompanying drawings illustrates, content all only in order to coordinate manual to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this manual as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
As shown in Figure 1, the utility model provides a kind of recoverable soil nailing, and it comprises:
Soil nailing nail end 1, comprise the nail tip 11, end plate 12 and the tube connector 13 that weld successively, packing plate 15 is provided with in described tube connector 13, as shown in Figure 2, packing plate 15 has via hole 151, the outer wall of tube connector 13 has external screw thread, and described end plate 12 is provided with the first injected hole 121 for being in the milk to nail tip place, and be connected with described end plate 12 sidewall of one end of described tube connector 13 is provided with the second injected hole 14;
The soil nailing main body of tubulose, soil nailing main body is connected by least two soil nailings joints 2 successively screw thread and forms, and is located by stop pin 4 between adjacent soil nailing joint 2, and wherein the soil nailing joint 2 of one end is connected with described tube connector 13 screw thread, and the outer wall of all soil nailing joints 2 has external screw thread;
Grouting Pipe (not giving diagram), one end of Grouting Pipe is located in the via hole 151 of described packing plate 15, and the other end of Grouting Pipe passes in whole described soil nailing main body;
Outer tube 3, the inwall of outer tube 3 has internal thread, and outer tube 3 is located in the tube connector 13 after being connected and soil nailing main body by thread bush.
The utility model adopts segmentation structure, the soil nailing achieved in small space reclaims, utilize many soil nailings to save screw thread to be successively connected and adjacent soil nailing internode is located by stop pin, solve the problem that forward construction, oppositely segmentation are reclaimed, the situation generation preventing from middle soil nailing from save being first separated; By arranging external screw thread at soil nailing joint outer wall, and research and develop the outer tube matched with it, recycling slip casting, achieve soil nailing total length beyond sliding area stressed, give full play to the effect of soil nailing, improved the stability of soil nail wall, also achieved counter-rotating simultaneously and reclaim.
Different according to soil nailing environment used, be divided into preformation cellular type soil nailing, self-drilling soil-nail and impacting soil nailing, the soil nailing nail end that different types of soil nailing correspondence uses is different, but soil nailing main body is identical.
Be: as shown in Figures 2 and 3 that it is top 11 for taper nail tip for its soil nailing of self-drilling soil-nail nail end concrete structure, generally adopt spiral helicine two blades welding to form.
That holds with nail for soil nailing main body when guaranteeing oppositely to reclaim is separated, and prevents transfer above-mentioned end plate 12 in soil nailing end to be provided with the first injected hole 121 for being in the milk to nail tip place, as shown in Figure 3; For realizing the slip casting of outside outside of sleeve wall, be connected with end plate 12 sidewall of one end of above-mentioned tube connector 13 is provided with the second injected hole 14, as shown in Figure 2.
For one-tenth cellular type soil nailing and impacting soil nailing, as shown in Figure 4, it is similar that its soil nailing nail end and the soil nailing of self-drilling soil-nail follow closely end structure, and difference is that its nail tip 11 is cross nail tip, generally becomes cross by the Plate Welding that 3mm is thick, and welds with end plate 12.The external diameter of the end plate 12 of the soil nailing nail end of impacting soil nailing is greater than the external diameter of soil nailing joint 2.
Above-mentioned tube connector 13 is steel pipe, and above-mentioned packing plate 15 adopts the steel plate of 3mm, and packing plate 15 is welded in tube connector 13.The size of above-mentioned end plate 12 is determined by the drilling diameter of soil nailing.By the slip casting of end plate 12, ensure that the cross nail tip that soil nailing nail is held or taper nail tip and the periphery soil body form an efficient integral, thus solve the problem reversely rotating soil nailing end transfer when reclaiming.
Be illustrated in figure 5 the concrete structure of above-mentioned soil nailing joint.Above-mentioned soil nailing joint is the silking steel pipe with forward, and its length generally elects 1m as, to adapt to construction space.Be welded to connect a hollow connecting bolt 21 in one end of every root soil nailing joint 2, the other end inwall of every root soil nailing joint 2 has internal thread, adopt connecting bolt 21 that two adjacent soil nailing joint screw threads are connected.And except that root soil nailing be connected with above-mentioned tube connector saves, the two ends of every root soil nailing joint 2 are equipped with the pin-and-hole 22 wearing stop pin, and that root soil nailing be connected with above-mentioned tube connector 13 saves only need one end band pin-and-hole.Can produce respectively when producing like this.
Be made into the silking with forward at the outer wall of steel pipe forming soil nailing main body, to be connected with outer tube 3, and outer tube is the threaded plastic bushing of inner wall belt.Adopt the plastic bushing with silking form soil nailing with the outside steel pipe with silking, and external outside of sleeve wall carries out slip casting, soil layer can be achieved to plastic bushing, plastic bushing to the effect of soil nailing main body transmitting force.For making whole soil nailing be connected with the steel mesh reinforcement of soil nail wall surface layer, rotate at the top (the soil nailing joint top of namely exposing) of whole soil nailing main body and be provided with bolt 5, this bolt is cross screw bolt.
Make introductions all round the work progress of various soil nailing and removal process below.
For preformation cellular type soil nailing, it is applicable to soil layer argillic horizon relatively preferably, and installation process is:
(1) Grouting Pipe is installed.Grouting Pipe is installed in the via hole 151 of the packing plate 15 of soil nailing nail end 1, and carry out sealing and fixing, rubber end socket is adopted to block (during slip casting the first injected hole 121 on end plate 12 and the second injected hole 14 on tube connector 13 again, when grouting pressure reaches 0.2MPa, end socket and injected hole are thrown off), prevent muddy water from entering in Grouting Pipe, the desirable whole soil nailing design length+1000mm of length of Grouting Pipe determines, adopt one section as far as possible, as Grouting Pipe connect time, hot-melt adhesive paste should be adopted, not spillage when guaranteeing slip casting.
(2) soil nailing main body is installed.Grouting Pipe is successively by central duct that all soil nailings save, the soil nailing joint 2 of one end with pin-and-hole is rotatably connected with above-mentioned tube connector 13, and then it is saved 2 with the soil nailing of two ends all with pin-and-hole be rotatably connected, connect the soil nailing joint of many two end band pin-and-holes successively, and fix adjacent soil nailing joint with stop pin 4.Save at all soil nailings the junction that 2 junctions and tube connector 13 and soil nailing save 2, adopt waterproof bandage to be wound around, screw thread butter is smeared, and prevents underground water from entering.
(3) surface of soil nailing main body coating lubricating oil in advance, outer tube 3 is gone to soil nailing nail end 1 along the external thread rotary of whole soil nailing, the joint area application fluid sealant shutoff of outer tube about 3 two ends and soil nailing main body, anti-sealing enters; According to many outer tubes, need the shutoff of application fluid sealant between outer tube, anti-sealing enters.So far this whole soil nailing has been assembled.
(4) then whole soil nailing is inserted in pore-forming.
(5) Grouting Pipe is utilized to carry out slip casting to soil nailing end and sidewall, the slurry until overflow in the aperture, top of whole soil nailing.
(6) at soil nail wall topping laying steel mesh reinforcement.
(7) the soil nailing joint top of exposing, swivel bolt 5 is connected with steel mesh reinforcement, and this bolt 5 is cross screw bolt, to cross screw bolt and expose soil nailing and save and carry out plastic wraps covering protection, and to whitewash.
After construction terminates, as follows to the removal process of preformation cellular type soil nailing: cleaning exposes the plastic sheeting of soil nailing joint, remove the connection of cross screw bolt 5 and soil nailing steel mesh reinforcement, reversely rotate soil nailing main body, rotate first soil nailing joint 2, stop pin 4 is removed, rotate next root section again, reclaim until reclaim complete described soil nailing main body successively, owing to being fixed by stop pin between each soil nailing joint 2, and the top internal water mud of cross of soil nailing nail end 1 is to the fixation of soil nailing nail end, the soil nailing joint 2 that can realize lowermost end follows closely the disengaging of end 1 with soil nailing, thus realize the recovery of soil nailing joint.According to existing constructing operation requirement, soil nail wall and outer wall of basement generally have the space of 1.0m at least, and the recovery of all soil nailings joint is convenient in this space.After soil nailing joint has reclaimed, insert Grouting Pipe and carry out slip casting, reduce the impact on surrounding enviroment as far as possible.
This recovery type soil nailing can be combined into stiffness soil nailing with oblique cement mixing pile, promotes the anti-pulling capacity of soil nailing, promotes the stability of pattern foundation pit supporting structure further.
And impacting soil nailing is applicable to the soil nailed wall retaining structure based on silt soil strata, at soil nailing erection stage, each soil nailing joint needs segmentation to be driven into, owing to being greater than the diameter of soil nailing joint 2 due to the diameter of soil nailing nail end end plate 12, therefore, in the process be driven into, the screw thread of outer tube can not be damaged.As run into soil layer relatively better more difficult be driven into time, Grouting Pipe can be utilized to inject water under high pressure, utilize that hydraulic fracture principle is auxiliary carries out, other construction technologies are with preformation cellular type soil nailing.
Self-drilling soil-nail is applicable to sandy soil layer, and soil nailing nail end 1 adopts the screw thread nail tip of taper, the taper nail tip utilizing screw blade to form, the screw blade of end is utilized to rotate into,, for more closely knit soil layer, the Grouting Pipe in hole can be utilized to inject water under high pressure auxiliary construction.Other construction technologies are identical with preformation cellular type soil nailing.
In sum, recoverable soil nailing of the present utility model, adopts segmentation structure form, and the soil nailing achieved in small space reclaims; Adopt outer tube to be enclosed within the soil nailing main body of tubulose, and both screw threads are connected ensure that both are jointly stressed; After recovery, only there are outer tube, soil nailing nail end and cement-soil to stay in soil mass of foundation pit, achieve the recoverable of resource, the saving material of maximum possible, also eliminate the problem adopting soil nailing to affect follow-up adjacent area underground engineering construction simultaneously.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.

Claims (5)

1. a recoverable soil nailing, is characterized in that, described recoverable soil nailing comprises:
Soil nailing nail end (1), comprise the nail tip (11), end plate (12) and the tube connector (13) that weld successively, packing plate (15) is provided with in described tube connector (13), packing plate (15) has via hole (151), tube connector outer wall has external screw thread, described end plate (12) is provided with the first injected hole (121) for being in the milk to nail tip place, and be connected with described end plate (12) sidewall of one end of described tube connector (13) is provided with the second injected hole (14);
The soil nailing main body of tubulose, soil nailing main body by least two soil nailings save (2) successively screw thread be connected form, and by stop pin (4) location between adjacent soil nailing joint (2), wherein soil nailing joint (2) of one end is connected with described tube connector (13) screw thread, and the outer wall of all soil nailings joint (2) has external screw thread;
Grouting Pipe, one end of Grouting Pipe is located in the via hole (151) of described packing plate (15), and the other end of Grouting Pipe passes in whole described soil nailing main body;
Outer tube (3), outer sleeve inner wall is provided with internal thread, and outer tube (3) is located in described tube connector (13) and soil nailing main body by thread bush.
2. recoverable soil nailing according to claim 1, is characterized in that: the end of soil nailing joint (2) of the described soil nailing main body other end is provided with the bolt (5) for being connected with soil nail wall surface layer.
3. recoverable soil nailing according to claim 1, is characterized in that: the external diameter of described end plate (12) is greater than the external diameter of described soil nailing main body.
4. recoverable soil nailing according to claim 1, is characterized in that: the taper nail tip that described nail tip (11) forms for screw-type blade.
5. recoverable soil nailing according to claim 1, is characterized in that: described nail tip (11) is cross nail tip.
CN201520662256.9U 2015-08-28 2015-08-28 But recovery type soil nail Withdrawn - After Issue CN204919546U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106480880A (en) * 2015-08-28 2017-03-08 上海勘测设计研究院有限公司 Recoverable soil nailing and the construction method using recoverable soil nail
CN107304565A (en) * 2016-04-19 2017-10-31 郑州大学 A kind of recoverable soil nail bar construction
CN111058459A (en) * 2019-12-25 2020-04-24 中铁五局集团第一工程有限责任公司 Recyclable small advanced catheter and use method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106480880A (en) * 2015-08-28 2017-03-08 上海勘测设计研究院有限公司 Recoverable soil nailing and the construction method using recoverable soil nail
CN107304565A (en) * 2016-04-19 2017-10-31 郑州大学 A kind of recoverable soil nail bar construction
CN111058459A (en) * 2019-12-25 2020-04-24 中铁五局集团第一工程有限责任公司 Recyclable small advanced catheter and use method thereof

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GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20151230

Effective date of abandoning: 20181127

AV01 Patent right actively abandoned