CN202881934U - Small-diameter steel pipe pile connection structure - Google Patents
Small-diameter steel pipe pile connection structure Download PDFInfo
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- CN202881934U CN202881934U CN2012206163901U CN201220616390U CN202881934U CN 202881934 U CN202881934 U CN 202881934U CN 2012206163901 U CN2012206163901 U CN 2012206163901U CN 201220616390 U CN201220616390 U CN 201220616390U CN 202881934 U CN202881934 U CN 202881934U
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- steel pipe
- lined
- joint
- welding
- small diameter
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Abstract
The utility model discloses a small-diameter steel pipe pile connection structure. By utilizing the small-diameter steel pipe pile connection structure, the connection strength of a small-diameter steel pipe pile is improved. The small-diameter steel pipe pile connection structure comprises a first steel pipe and a second steel pipe butted with each other together, wherein a lining steel pipe is sleeved on a butted position between the first steel pipe and the second steel pipe; both ends of the lining steel pipe respectively extend into the first steel pipe and the second steel pipe; the lining steel pipe, the first steel pipe and the second steel pipe are welded to form a whole by welding lines on the butted position between the first steel pipe and the second steel pipe; preformed holes are formed in the first steel pipe and the second steel pipe respectively; the preformed holes are over against the lining steel pipe; and both ends of the lining steel pipe, the first steel pipe and the second steel pipe are respectively fixed and welded to form a whole by welding spots on the preformed holes. The small-diameter steel pipe pile connection structure is high in strength, simple in structure and convenient to operate.
Description
Technical field
The utility model relates to steel pipe connection structure, especially the small diameter steel pipe piles syndeton.
Background technology
Small diameter steel pipe piles is a kind of novel side slope Anti-sliding stopping structure, the minor diameter hollow steel pipe is inserted in the sloping preexisting hole in limit (cunning), then high pressure pouring cement mortar at the bottom of steel pipe, stake top adopt a transverse and longitudinal contact beam to connect the campshed framework of formation-pile peripheral earth composite space structural bearing body.The steel pipe piling structure anti-sliding mechanism that small diameter steel pipe piles can bear larger horizontal loading mainly comprises: steel pipe pile is kept the aspects such as composite bearing under the stable and reinforced platoon's shelf structure supporting capacity of inter-pile soil, the pile-soil interaction, Effect of Grouting to invigoration effect, the soil arching effect of inter-pile soil.With respect to traditional heavy retaining structure, the minor-diameter steel-tube campshed has quick construction, safe and simple, economic benefit is high, applicable elements is wide, the outstanding advantages little to ambient influnence, have good engineering using value, have wide popularizing application prospect at aspects such as emergency repair, landslide control, side slope protection, pattern foundation pit supporting structures.Connect with steel tube the stake of structure joint steel pipe, construction technology is advanced, safe and reliable, intensity and anti-corrosive properties are good, high efficiency.It is 127～140mm that steel pipe pile is selected diameter, wall thickness is the minor diameter electric welding steel pipes with straight of 4.5～6mm, every long 6m dispatches from the factory, and general construction requirement length is often greater than 6m, because the maximum length of the production of steel is subject to the aspects such as equipment that the steel tube factory produces and transportation, produce the equipment of oversize steel pipe needs and the mode of transportation and will cause very large difficulty, need joint steel pipe.Existing link technique is normal, and to adopt two steel duct suit length that connect at needs be lined steel pipe about 25cm and only welded together two steel pipes and lined steel pipe at joint substantially, junction single cross section welding, this mode steel pipe bonding strength is low, the anti-sliding support function of structure can not get performance, cause structure under thrust, to lose efficacy, cause engineering accident.
The utility model content
Technical problem to be solved in the utility model provides the high small diameter steel pipe piles syndeton of a kind of bonding strength.
The technical scheme that its technical problem that solves the utility model adopts is: the small diameter steel pipe piles syndeton, comprise the first steel pipe and the second steel pipe that are docking together, joint at the first steel pipe and the second steel pipe is set with lined steel pipe, the two ends of described lined steel pipe are stretched into respectively in the first steel pipe and the second steel pipe, lined steel pipe, the first steel pipe and the second steel-pipe welding are integrated by weld seam at the joint of the first steel pipe and the second steel pipe; Be provided with preformed hole on the first steel pipe and the second steel pipe, described preformed hole fixedly is welded as a whole two ends and the first steel pipe, second steel pipe of lined steel pipe respectively by solder joint at the preformed hole place over against lined steel pipe.
Be provided with four preformed holes at the first steel pipe and the second steel pipe, described four preformed holes are distributed on the same cross section.
Described lined steel pipe length is 80～120cm.
Weld seam adopts the welding of groove penetration, and groove angle is 45 °, and the joint gap of the first steel pipe and the second steel pipe is 20mm.
Be provided with anticorrosive coat on weld seam and the solder joint external surface.
Anticorrosive coat comprises internal layer with outer, and internal layer is that thickness is the zinc layer of 160 μ m, and skin is that thickness is the epoxy sealing coating of 50 μ m.
The beneficial effects of the utility model are: lined steel pipe and the first steel pipe and the second steel pipe adopt the multi-section welding, and bonding strength is high, and reason pile body adapter place strength deficiency is not subjected to curved sheared destruction, cause retaining structure to lose efficacy, and cause engineering accident; Respectively two ends and the first steel pipe, second steel pipe of lined steel pipe fixedly are welded as a whole by solder joint at the preformed hole place, easy to connect, simple to operate, economical with materials; Be provided with four preformed holes at the first steel pipe and the second steel pipe, four preformed holes are distributed on the same cross section, form the welding of three cross sections, in the situation that guarantee bonding strength, and convenient and simple for operation; Adopting length is the lined steel pipe of 80～120cm, and the bonding strength effect is best; The welding of groove penetration is adopted in the commissure, makes electric arc reach root, guarantee that the root through welding avoids not welding and the defective such as incomplete fusion, and groove section is long-pending minimum, thereby the deposited metal loading is minimum, the highest and post-weld stress of welding efficiency and be out of shape little; On weld seam and the solder joint external surface anticorrosive coat is arranged, the protection weld avoids the steel pipe junction to be subjected to corrosion to cause Joint failure.
Description of drawings
Fig. 1 is small diameter steel pipe piles syndeton sectional view;
Fig. 2 is along A-A sectional drawing among Fig. 1;
Fig. 3 is the partial enlarged drawing at I place among Fig. 1;
Fig. 4 is along B-B sectional drawing among Fig. 1;
Fig. 5 is the partial enlarged drawing at K place among Fig. 4;
Fig. 6 is along C-C sectional drawing among Fig. 1;
Mark among the figure: 1-the first steel pipe, 2-the second steel pipe, the 3-lined steel pipe, the 4-weld seam, the 5-solder joint, the 6-anticorrosive coat, the 61-internal layer, 62-is outer, α-groove angle.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Such as Fig. 1,2,3,4,5, shown in 6, the small diameter steel pipe piles syndeton, comprise the first steel pipe 1 and the second steel pipe 2 that are docking together, joint at the first steel pipe 1 and the second steel pipe 2 is set with lined steel pipe 3, the two ends of described lined steel pipe 3 are stretched into respectively in the first steel pipe 1 and the second steel pipe 2, joint at the first steel pipe 1 and the second steel pipe 2 passes through weld seam 4 with lined steel pipe 3, the first steel pipe 1 and the second steel pipe 2 are welded as a whole, be provided with preformed hole on the first steel pipe 1 and the second steel pipe 2, described preformed hole is over against lined steel pipe 3, at the preformed hole place by solder joint 5 respectively with two ends and first steel pipe 1 of lined steel pipe 3, the second steel pipe 2 fixedly is welded as a whole.Traditional connected mode only just welds together lined steel pipe 3 and the first steel pipe 1 and the second steel pipe 2 at joint.The welding of single cross section easily because pile body adapter place strength deficiency is subjected to curved sheared destruction, causes retaining structure to lose efficacy, and causes engineering accident.In order to strengthen the bonding strength of steel pipe, preferably adopt the multi-section welding, when avoiding the junction to come off, whole connection will be suffered to destroy and cause security incident, so the first steel pipe 1 outside lined steel pipe 3 two ends and the second steel pipe 2 adopt spot-welded on, by solder joint 5 the first steel pipe 1, the second steel pipe 2 and lined steel pipe 3 are welded together, increased the welded section of lined steel pipe 3, the first steel pipe 1 and the second steel pipe 2, form the multi-section welding.The spot-welded on time is short, efficient is high, cost is low, face of weld is smooth.Traditional spot welding is directly at weld, utilizes resistance heat to melt base metals, forms solder joint 5, and weld interval is longer, location difficulty.So reserve the location of the convenient solder joint 5 that portals at weld, simplified welding process, improve the efficient of welding, also improved the Welding Safety sanitary condition.
A hole, two holes, three holes, four holes can be set on the first steel pipe 1 and the second steel pipe 2 or increase bonding strength greater than four holes, if solder joint 5 is welded to connect by a hole and two holes, stressed bonding strength is less, because small diameter steel pipe piles is in outdoor environment for a long time, it is high that bonding strength requires, so preferably select three holes, four holes or greater than four holes.Because little diameter of steel tube is less, if too many hole is set, solder joint 5 is too many, complicated operation, and efficient is low, and the too little stress that easily causes of distance is concentrated between the solder joint 5, causes Joint failure.After steel pipe pile was lowered to, may there be deviation the position in three holes, and not over against the Thrust of Landslide direction, unbalance stress can be alleviated this situation after four holes are arranged symmetrically with, and bonding strength is higher.If the hole is not on same cross section, unbalance stress between the solder joint 5 also can cause Joint failure, therefore as preferred embodiment, as shown in Figure 4, be provided with four preformed holes at the first steel pipe 1 and the second steel pipe 2, described four preformed holes are distributed on the same cross section.In the situation that guarantee bonding strength, simplify step, the situation of avoiding stress to concentrate, easily operation.
Common lined steel pipe 3 length are about 25cm substantially, only welded together with lined steel pipe 3 the first steel pipe 1, the second steel pipe 2 at joint, these mode lined steel pipe 3 length are shorter, the length that stretches into the first steel pipe 1 and the second steel pipe 2 inside is shorter, after weld lost efficacy, lined steel pipe 3 easily comes off from the first steel pipe 1 and the second steel pipe 2 inside, and the welding of single cross section, so the steel pipe bonding strength is low.If adopt the lined steel pipe 3 about 25cm, the multi-section welding, lined steel pipe 3 is too short, and weld is too concentrated on the lined steel pipe 3, and larger power is born in lined steel pipe 3 parts, and weld is stressed excessive, easily comes off.Weld is more concentrated, inconvenient workman's operation.The anti-sliding support function of structure can not get performance, causes structure to lose efficacy under thrust, causes engineering accident.And the utility model is by a large amount of practices, when the lined steel pipe 3 length 80cm that selects～120cm, lined steel pipe 3 and the first steel pipe 1, the second steel pipe 2 adopt the welding of three cross sections, the part that lined steel pipe 3 stretches into the first steel pipe 1 and the second steel pipe 2 is longer, if one of them weld comes off, lined steel pipe 3 can not come off from the first steel pipe 1 and the second steel pipe 3 inside yet, and bonding strength is high, so as preferred embodiment, described lined steel pipe 3 length are 80～120cm.
The welding of weld seam 4 can be adopted pressure welding, soldering, melting welding, and pressure welding is to make workpiece in the interatomic combination of solid-state lower realization under pressurized conditions.Soldering is to use to make solder than the low-melting metal material of workpiece, fill interface gaps and realize interatomic phase counterdiffusion with workpiece, thereby realize the method for welding, soldered fitting intensity is low, more employing joint form has increased the consumption of mother metal and the weight of structure.Because small-sized steel pipe pile is used for outdoor environment mostly, requires welding manner simple, welding equipment is few, so as optimum embodiment, as shown in Figure 3, weld seam 4 adopts the welding of groove penetration, groove angle α is 45 °, and the joint gap is 20mm.Do not need pressurization during the melting welding welding, melting welding makes electric arc reach the root of joint, and weld strength is high, guarantee that the root through welding avoids not welding and the defective such as incomplete fusion, and groove section is long-pending minimum, thereby the deposited metal loading is minimum, the highest and post-weld stress of welding efficiency and be out of shape little.Because it is thinner such as 4.5mm, 5.75mm that minor-diameter steel-tube connects pile pipe wall general thickness, according to working experience, select 45 ° when groove angle, when joint 6 gaps were 20mm, weld strength was the highest.
Shown in Fig. 2,3,4, be provided with anticorrosive coat 6 on weld seam 4 and solder joint 5 external surfaces.Because small diameter steel pipe piles is multiplex in the landslide; side slope of embankment; the outdoor environments such as foundation ditch; corroded by rainwater; especially weld easily is subjected to the corrosion failure syndeton; so require the weld external surface is carried out anti-corrosion protection; cover anticorrosive coat 6 at weld seam 4 and solder joint 5 external surfaces; make metal product and corrosive medium isolation on every side; such as painting on weld seam 4 and solder joint 5 external surfaces; the corrosion resistant nonmetals such as plastic covering; or on weld seam 4 and solder joint 5 external surfaces matel coated; form oxide after the burning; metal-oxide film is as anticorrosive coat 6, thus the corrosion steel pipes such as prevention water and air.
Little steel pipe is longer application life, belong to permanent shelves engineering, and corroded by rainwater, if adopt painting as anticorrosive coat 6, paint is lower with the adhesion strength of steel pipe, resistance to erosion and abrasion of particles ability are low, easily cause the Local map pull-up to fall, damage and cause Joint failure, paint anticorrosion generally the use only 10 years or 15 years, if adopt plastic covering as anticorrosive coat 6, plastic covering is inconvenient to operate, and the plastic pollution environment.Therefore as preferred embodiment, as shown in Figure 5, anticorrosive coat 6 comprises internal layer 61 and skin 62, and internal layer 61 is that thickness is the zinc layer of 160 μ m, and outer 62 is that thickness is the epoxy sealing coating of 50 μ m.Internal layer 61 is on solder joint 5, and outer 62 on internal layer 61.The anticorrosive coat 6 of weld seam 4 is identical with the anticorrosive coat of solder joint 5.Because steel pipe is used for outdoor environment for a long time, so the anticorrosion time limit of steel-pipe welding place external surface requires longer, adopt the spray zinc time limit can reach service free more than 30 years, if behind spray zinc, spray again seal coat, its corrosion resistance will exceed 50%～130% than independent spray zinc corrosion fatigue life value sum, so coat the epoxy sealing coating that the characteristics for zinc coating develop in the zinc outside.
Embodiment
Shown in Fig. 1,2,3,4,5,6, the small diameter steel pipe piles syndeton comprises the first steel pipe 1 and the second steel pipe 2 that is docking together, joint at the first steel pipe 1 and the second steel pipe 2 is set with the lined steel pipe 3 that length is 80～120cm, the two ends of described lined steel pipe 3 are stretched into respectively in the first steel pipe 1 and the second steel pipe 2, joint at the first steel pipe 1 and the second steel pipe 2 is welded as a whole lined steel pipe 3, the first steel pipe 1 and the second steel pipe 2 by weld seam 4, weld seam 4 adopts the welding of groove penetration, groove angle α is 45 °, and the joint gap is 20mm; Be provided with four preformed holes that are distributed on the same cross section on the first steel pipe 1 and the second steel pipe 2, described preformed hole is over against lined steel pipe 3, respectively two ends and the first steel pipe 1, second steel pipe 2 of lined steel pipe 3 fixedly are welded as a whole by solder joint 5 at the preformed hole place, then coated anti-corrosion layer 6 on weld seam 4 and solder joint 5 external surfaces, anticorrosive coat comprises internal layer 61 and outer 62, internal layer 61 is that thickness is the zinc layer of 160 μ m, and outer 62 is that thickness is the epoxy sealing coating of 50 μ m.
The present embodiment the first steel pipe 1 and the second steel pipe 2 are set with lined steel pipe 3, and the two ends of described lined steel pipe 3 are stretched into respectively in the first steel pipe 1 and the second steel pipe 2, have increased the pipe thickness of junction, and the tube wall anti-pressure ability is strong; Joint at the first steel pipe 1 and the second steel pipe 2 is welded as a whole lined steel pipe 3, the first steel pipe 1 and the second steel pipe 2 by weld seam 4, and three cross sections that respectively two ends and the first steel pipe 1, second steel pipe 2 of lined steel pipe 3 fixedly are welded as a whole by solder joint 5 at preformed hole place welding, increased bonding strength, reason pile body adapter place strength deficiency is not subjected to curved sheared destruction, cause retaining structure to lose efficacy, cause engineering accident; Solder joint 5 welds together lined steel pipe 3 and the first steel pipe 1 and the second steel pipe 2 by four equally distributed holes, has avoided stress to concentrate, and convenient welding is simple to operate; Spraying corrosion resistant coating 6 on weld seam 4 and solder joint 5 external surfaces, internal layer 61 is that thickness is the zinc layer of 160 μ m, outer 62 is that thickness is the epoxy sealing coating of 50 μ m, has avoided weld to be subjected to corrosion to cause Joint failure.
Claims (6)
1. small diameter steel pipe piles syndeton, comprise the first steel pipe (1) and the second steel pipe (2) that are docking together, joint at the first steel pipe (1) and the second steel pipe (2) is set with lined steel pipe (3), the two ends of described lined steel pipe (3) are stretched into respectively in the first steel pipe (1) and the second steel pipe (2), joint at the first steel pipe (1) and the second steel pipe (2) passes through weld seam (4) with lined steel pipe (3), the first steel pipe (1) is welded as a whole with the second steel pipe (2), it is characterized in that: be provided with preformed hole on the first steel pipe (1) and the second steel pipe (2), described preformed hole is over against lined steel pipe (3), at the preformed hole place by solder joint (5) respectively with two ends and first steel pipe (1) of lined steel pipe (3), the second steel pipe (2) fixedly is welded as a whole.
2. small diameter steel pipe piles syndeton as claimed in claim 1 is characterized in that: be provided with four preformed holes at the first steel pipe (1) and the second steel pipe (2), described four preformed holes are distributed on the same cross section.
3. small diameter steel pipe piles syndeton as claimed in claim 1, it is characterized in that: described lined steel pipe (3) length is 80～120cm.
4. small diameter steel pipe piles syndeton as claimed in claim 1 is characterized in that: weld seam (4) adopts the welding of groove penetration, and groove angle (α) is 45 °, and the first steel pipe (1) is 20mm with the joint gap of the second steel pipe (2).
5. such as claim 1 or 4 described small diameter steel pipe piles syndetons, it is characterized in that: be provided with anticorrosive coat (6) on weld seam (4) and solder joint (5) external surface.
6. small diameter steel pipe piles syndeton as claimed in claim 5, it is characterized in that: anticorrosive coat (6) comprises internal layer (61) and outer (62), internal layer (61) is that thickness is the zinc layer of 160 μ m, and outer (62) are that thickness is the epoxy sealing coating of 50 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206163901U CN202881934U (en) | 2012-11-20 | 2012-11-20 | Small-diameter steel pipe pile connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206163901U CN202881934U (en) | 2012-11-20 | 2012-11-20 | Small-diameter steel pipe pile connection structure |
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| Publication Number | Publication Date |
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| CN202881934U true CN202881934U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012206163901U Expired - Lifetime CN202881934U (en) | 2012-11-20 | 2012-11-20 | Small-diameter steel pipe pile connection structure |
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| CN (1) | CN202881934U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145815A (en) * | 2020-09-25 | 2020-12-29 | 广东韶钢松山股份有限公司 | Corrosion-resistant steel pipe and preparation method thereof |
| CN114378412A (en) * | 2021-12-31 | 2022-04-22 | 珠海华发人居生活研究院有限公司 | Middle sleeve connection construction method for micro steel pipe pile sleeve in limited space |
-
2012
- 2012-11-20 CN CN2012206163901U patent/CN202881934U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145815A (en) * | 2020-09-25 | 2020-12-29 | 广东韶钢松山股份有限公司 | Corrosion-resistant steel pipe and preparation method thereof |
| CN114378412A (en) * | 2021-12-31 | 2022-04-22 | 珠海华发人居生活研究院有限公司 | Middle sleeve connection construction method for micro steel pipe pile sleeve in limited space |
| CN114378412B (en) * | 2021-12-31 | 2023-10-20 | 珠海华发人居生活研究院有限公司 | Construction method for sleeve-in-sleeve connection of limited-space miniature steel pipe pile sleeve |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |