CN203320810U - Steel tube concrete structure - Google Patents
Steel tube concrete structure Download PDFInfo
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- CN203320810U CN203320810U CN2013204042150U CN201320404215U CN203320810U CN 203320810 U CN203320810 U CN 203320810U CN 2013204042150 U CN2013204042150 U CN 2013204042150U CN 201320404215 U CN201320404215 U CN 201320404215U CN 203320810 U CN203320810 U CN 203320810U
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Abstract
The utility model discloses a steel tube concrete structure which comprises a steel tube column and concrete. The steel tube concrete structure is characterized in that a plurality of strengthening transverse partition plates are arranged in the steel tube column at scheduled intervals, a circular pouring hole is formed in each strengthening transverse partition plate, and a plurality of vent holes are formed below each strengthening transverse partition plate along the peripheral edge of the steel tube column. The concrete is evenly distributed in the steel tube column. According to the steel tube concrete structure, the strength is remarkably higher than that of an existing structure, the vent holes are beneficial to density of the concrete at the bottom of each transverse partition plate, the mortar overflow degree of small holes in the column wall can be checked in the pouring process, and the density degree of the concrete can be preliminarily judged.
Description
Technical field
The utility model relates to the concreting technology, is specifically related to a kind of encased structures.
Background technology
Encased structures be a kind ofly have that bearing capacity is high, the new composite structure form of the characteristics such as plasticity and good toughness, material saving, easy construction.With respect to general reinforced concrete structure, concrete filled steel tube has plurality of advantages.Therefore, there is in recent years increasing building to adopt steel pipe column (rectangle, circle) concrete combined structure.
Traditional pouring procedure of steel pipe column inner concrete has pumping, jacking casting method, a high position to leave three kinds of without vibration method, self-compacting concrete casting methods at present.Strengthen diaphragm because steel pipe column (rectangle, circle) concrete combined structure generally is provided with multiple tracks in steel pipe column, the conventional construction method concreting is difficult to successfully, more is difficult to guarantee post inner concrete density.
Summary of the invention
The present utility model people is through research, find to adopt tremie method to build the density that cooperation is manually vibrated simultaneously job practices can effectively guarantee the post inner concrete, significantly improve the pouring quality of steel pipe column inner concrete, and a kind of high-quality encased structures is provided thus.
A kind of scheme of the present utility model provides a kind of encased structures, comprises steel pipe column and concrete, it is characterized in that: be provided at predetermined intervals a plurality of reinforcement diaphragms in steel pipe column, each strengthens offering a circular pouring hole on diaphragm; Below each strengthens diaphragm, along the periphery of steel pipe column, offer a plurality of steam vents; Concrete is uniformly distributed in steel pipe column.
Owing to being provided with a plurality of reinforcement diaphragms in steel pipe column, therefore according to the intensity of encased structures of the present utility model apparently higher than existing structure, and steam vent is conducive to the concrete closely knit of diaphragm bottom, and can in casting process, check that post jamb aperture mortar overflows degree, tentatively judges concrete density.
Preferably, the length of steel pipe column is in the scope of 6m～15m, and predetermined space is in the scope of 1.5m～3m, and the diameter of pouring hole is in the scope of 200 mm～400mm, and the concrete slump is less than 120mm.Preferably, a plurality of steam vents are evenly laid along the periphery of steel pipe column, and a plurality of steam vents and the corresponding vertical distance of strengthening between diaphragm are less than 0.1m, and the diameter of a plurality of steam vents is 5mm.
According to a kind of scheme, steel pipe column has rectangular cross section, and the size of rectangular cross section is in the scope of 400mm * 400mm～1000mm * 1000mm.
According to another kind of scheme, steel pipe column has circular cross section, and the diameter of circular cross section is in the scope of 400mm～1000mm.
In simple terms, job practices of the present utility model can be summarized as at the steel pipe column top and set up operating platform, inserts upper end in steel pipe column the conduit tube component of concrete hopper is housed, while build and promote from bottom to top, the cooperation of manually vibrating, until complete building of steel pipe inner concrete.
According to one side of the present utility model, provide a kind of in steel pipe column the method for concreting, one or more reinforcement diaphragms have been provided at predetermined intervals in wherein said steel pipe column, offer a pouring hole on each described reinforcement diaphragm, described method comprises: at described steel pipe column top, set up operating platform; By the more piece steel conduit formation conduit tube component that is stitched together in turn, and with tower crane by the vertical handling of described conduit tube component in described steel pipe column, make described conduit tube component through the lower ending opening of described pouring hole and described conduit tube component from the distance of described steel pipe column bottom in the scope of 300～400mm; Concrete hopper is assembled to described conduit tube component upper end; Insert in described steel pipe column by the vibrating head of vibrator and, through described pouring hole, be banded with steel cable outside the flexible axle rubber tube of wherein said vibrator; From described concrete hopper, will be identical with the slurry composition in concrete to be built via described conduit tube component cement mortar be filled in described steel pipe column bottom with the thickness of 50～100mm; Start described vibrator, and execution following steps: a is from described concrete hopper, pour into concrete in described steel pipe column via described conduit tube component, wherein control the concrete volume poured into, make the concrete height at every turn poured into be less than or equal to 1.5m, and the degree of depth that described conduit tube component submerges in concrete is not less than 1m; B is to insert soon the method for pulling out slowly, utilize described vibrating head to be vibrated to poured into concrete, wherein described vibrating head is vertically inserted in concrete and pointwise is moved, vibrated in order, the time of at every turn vibrating is no less than 30 seconds, to guarantee that in concrete, bubble overflows, and wherein insertion point is uniformly distributed along described steel pipe column circumference, the spacing between described insertion point is not more than 1.5 times of operating radius of described vibrating head; C is after completing described vibrating, upwards promote described conduit tube component and described vibrating head, wherein in the process that upwards promotes described conduit tube component, the lower ending opening of described conduit tube component is embedded in the inside concrete of having built all the time, and wherein when at described reinforcement diaphragm place, concreting continuously, overflow on described reinforcement diaphragm while being not less than 100mm until concrete, promotes described conduit tube component to building proceeding on this reinforcement diaphragm; Repeating step a-c, until from the upper end open 1m place of described steel pipe column.
The present utility model people's discovery, artificial vibrated concrete can make post inner concrete quality even, and it is easier to make especially the quality control of the concrete density in steel pipe column; Because steel pipe itself is good reinforcing bar load-bearing skeleton, remove the series of process processes such as formed reinforcing steel bars from simultaneously, therefore can simplify construction technology; Steel pipe itself is exactly good anti-side pressure template in addition, thus during placing of concrete, can save a large amount of formworks, form removal is artificial and material.
With respect to existing three kinds of job practicess, provided by the utility model in steel pipe column the method for concreting there is plurality of advantages, or overcome their existing shortcoming:
1. with respect to the pumping, jacking casting method, the utility model need to not opened charging aperture and the release hole is set on steel pipe column, avoids weakening the globality of the steel plate of steel pipe column, and conveying equipment requires lower; The utility model is shorter than the pumping-up method preparation of construction time, simpler than the control program of pumping-up method, simpler than the construction equipment of pumping-up method, than pumping-up method to concrete raw material require low, cost-saving;
2. throw the without vibration concrete construction method with respect to height, the utility model can adopt general commercial concrete, low to the quality requirement of concrete raw material, easily controls concrete quality during cast, and be applicable to the steel core concrete column of any height, cost-saving; High throwing without vibration concrete construction method is applicable to caliber and is greater than 350mm, highly be not less than 4m steel pipe column concrete column, the high without vibration concrete of throwing needs high fluidity, stability, education resistance simultaneously, throw the kinetic energy produced when utilization is built and realize the closely knit concrete that flows from eminence, therefore the high without vibration concrete of throwing requires highly to raw-material, is not easy to control well quality in the practice of construction process;
3. self-compacting concrete is the large concrete of mobility of making by means of powders such as high efficiency water reducing agent, fluidizing reagent, plasticizing agent and adding coal ash, slags, so it is high to the concrete raw material quality requirement, and cost price is large; Test and show simultaneously, self-compacting concrete does not affect the dry amount of contraction of concrete, but, for method described in the utility model, it affects concrete modulus of elasticity.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below will the accompanying drawing of required use in the description of embodiment or prior art be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, without paying creative work, can obtain according to these accompanying drawings other embodiment.
Fig. 1 is illustrated in the schematic cross-section according to the encased structures in the implementation process of concreting method of the present utility model;
Fig. 2 illustrates the indicative flowchart of the method for concreting in steel pipe column according to embodiment of the present utility model; And
Fig. 3 illustrate according to embodiment of the present utility model in steel pipe column concreting method and carry out preparation before the method and the term of execution the indicative flowchart of detection.
The specific embodiment
Below in conjunction with accompanying drawing, the technical scheme of the utility model embodiment is carried out to clear, complete description, obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
Before implementing construction technology of the present utility model, need carry out following preparation of construction:
1. train before work and confide a technological secret.Steel pipe column inner concrete tremie placing method continuity is stronger, requires many teams and groups, multiplex (MUX) to plant coordinative operation.Must make the administrative staff, the operating personnel that participate in construction understand this characteristics.And require to carry out detailed confiding a technological secret according to construction drawing and pertinent regulations, carry out conscientious pre-job training according to different teams and groups, different post, the task that clear and definite this post of personnel of participating in operation should be completed, the quality specifications that must reach and with the requirement that coordinates of other work posts, guarantee that each work post is harmonious, high-quality construction at a high speed.
2. the labour prepares.The labour should determine the people by post, takes appointment with certificate, and certain surplus capacity is arranged.Formulate every manpower management measure, tighten management, everyone has responsibility, guarantees construction quality and safety.
3. operating condition is prepared.Steel pipe column is installation fixation, and completes the examination that inspection lot is installed.
Fig. 1 is illustrated in the schematic cross-section according to the encased structures in the implementation process of concreting method of the present utility model, from this figure, can know the basic structure of finding out steel pipe column.Operating platform 101 is set up at steel pipe column 103 tops, and preferably, it is set up on corresponding operating platform girder steel 102.Be provided at predetermined intervals a plurality of reinforcement diaphragms 104 in steel pipe column 103, each strengthens offering a for example circular pouring hole (for example, at middle position) on diaphragm 104.According to embodiment, steel pipe column 103 has rectangle or circular cross section, and sectional dimension is for example 400mm * 400mm～1000mm * 1000mm or Φ 400mm～1000mm; The length of steel pipe column 103 is for example in the scope of 6-15m; Described predetermined space is 1.5-3m, is preferably 2m; The size of pouring hole is for example Φ 200 mm～400mm.According to an embodiment, offering a plurality of diameters along the periphery of steel pipe column below each strengthens diaphragm 104 is for example the steam vent 105 of 5mm, be beneficial to diaphragm 104 bottoms concrete closely knit, and can in casting process, check that post jamb aperture mortar overflows degree, tentatively judges concrete density.
Fig. 2 illustrates the indicative flowchart of the method for concreting in steel pipe column according to embodiment of the present utility model.Below in conjunction with Fig. 1, the construction technology of Fig. 2 is specifically described.
In step 201, set up operating platform 101(optimizely select at steel pipe column 103 tops and be located on operating platform girder steel 102).The capital operating platform is answered safety and firmness, can give the enough spaces of operator, and the type selecting of main stressed member should be through calculating.Can adopt the shaped steel typing to make, convenient mounting or dismounting.
In step 202, more piece steel conduit is stitched together in turn and forms conduit tube component 106, and with tower crane by the vertical handling of described conduit tube component 106 in steel pipe column 103, make conduit tube component 106 through the lower ending opening of described pouring hole and conduit tube component 106 from the distance of steel pipe column 103 bottoms in the scope of 300～400mm.The diameter of conduit should be according to the pouring hole size Selection on the diaphragm 104 in steel pipe column 103, and the sideshake on catheter wall and pouring hole limit preferably should not be less than 100mm, generally can select the conduit of Φ 100～200mm.Conduit is preferably 2m mono-joint, to facilitate mounting or dismounting and to promote.Pipe joint evagination size should be less, can adopt screw-type joint, the snap joint of key pin formula, soft cable-styled snap joint etc.
In step 203, the concrete hopper (not shown) is assembled to conduit tube component 106 upper ends.Relevant operation about concrete hopper is known in the art, does not repeat them here.
In step 204, insert in steel pipe column 103 by the vibrating head of vibrator 107 and pass described pouring hole, because the flexible axle length of poker vibrator is very long, (hose length of vibrating head need be greater than the length of steel pipe column, can customize to producer in case of necessity), so at flexible axle rubber tube 108 outside colligation steel cables of vibrator, to strengthen the extraction-resistant behavior of vibrating head.The concrete structure of relevant vibrator and basic operation are also well known in the art, therefore will save the specific descriptions to it.
In step 205, from described concrete hopper, will be identical with the slurry composition in concrete to be built via conduit tube component 106 cement mortar be filled in steel pipe column 103 bottoms with the thickness of for example 50～100mm.
In step 206, start described vibrator, and carry out following operation:
A is from described concrete hopper, pour into concrete in steel pipe column 103 via conduit tube component 106, wherein control the concrete volume poured into, make the concrete height at every turn poured into be less than or equal to 1.5m, and the degree of depth h that conduit tube component 106 submerges in concrete is not less than 1m;
B is to insert soon the method for pulling out slowly, utilize 107 pairs of concrete that pour into of vibrating head to be vibrated, wherein insert in concrete and pointwise is moved, vibrated in order (as slightly tilted by vibrating head 107 is vertical, incline direction should be consistent, in order to avoid leak, shake), the time of at every turn vibrating is no less than 30 seconds, to guarantee that in concrete, bubble overflows smoothly, and wherein insertion point is uniformly distributed along steel pipe column 103 circumferences, the spacing between described insertion point is not more than 1.5 times (being preferably 300 ~ 400mm) of the operating radius of vibrating head 107; According to embodiment, vibrator in use first starts its bobbing machine, then penetration concrete, during the hopper haul, vibrating head is extracted to layer of concrete, allows it keep sky state that shakes; Preferably, time of vibration can not be long, to prevent concrete segregation, layering;
C is after completing described vibrating, upwards promote conduit tube component 106 and vibrating head 107, wherein in the process that upwards promotes conduit tube component 106, the lower ending opening of conduit tube component 106 is embedded in the inside concrete of having built all the time, and wherein when when strengthening diaphragm 104 place, continuously and preferred concreting at a slow speed, until concrete, overflow while strengthening on diaphragm 104 being not less than 100mm, promote conduit tube component 106 to building proceeding on this reinforcement diaphragm, continue to build a top layer concrete;
Repeating step a-c, until stop (staying constuction joint) (step 207) behind the upper end open 1m place of steel pipe column 103, the high temperature produced when avoiding upper strata pillar welding has adverse effect to concrete quality.Then, preferably can move to next root steel pipe column (step 208), to proceed construction.
In above-mentioned casting process, preferably segregation phenomenon must not occur in concrete, and preferably, when concrete is transported to pouring location, should meet the slump of building regulation, when having segregation phenomenon to occur, need before building, carry out secondary agitation.Strengthen diaphragm 104 owing to being provided with at a certain distance in steel pipe column, therefore the concrete slump should not be too little, for example the slump can be controlled to 120mm.In addition, the initial setting time should consider according to concrete transportation range, cast in situs time.
According to an embodiment, preferably, the described steel conduit of removal section by section after described conduit tube component is upwards promoted.According to an embodiment, the time of preferably at every turn vibrating is not more than 60 seconds, to prevent concrete disintegration, layering.Preferably, when starting the concrete on a reinforcement diaphragm 104 is vibrated, vibrating head 107 is inserted to 50mm in the concrete of strengthening under diaphragm 104, to eliminate the seam of strengthening between the upper and lower concrete of diaphragm 104.Preferably, concreting should carry out continuously; As must be intermittently, its intermittent time should shorten as far as possible, and should be before the anterior layer concrete initial set, and sublevel concreting is complete.Maximum duration intermittently should be definite by cement type used and concrete initial set condition, and generally surpassing 3 hours should be by treatment of construction joints.Preferably, after the final set of steel pipe column inner concrete, absorb bleeding with dry sponge, and add a cover hush panel on capital, avoid rainwater, rubbish to fall in steel pipe column.
The pouring quality of steel pipe column inner concrete, the method that can knock steel plate with iron hammer is made trial inspection.Position for important component and position or hammering method inspection discovery cacophonia, also need to adopt supercritical ultrasonics technology to be detected.For compaction rate and the uniformity that detects concrete filled steel tube, answer the Reasonable Arrangement test point, detect concrete filled steel tube and whether have defect and defective locations, carry out detailed record and mark, to uncompacted position, should adopt localized borehole and mud jacking to carry out reinforcement, the repair welding of then holing sealing firmly.More than concise and to the point description has all been carried out in the operation of other except casting method in the flow chart of Fig. 3.
Adopt casting method of the present utility model can obtain a kind of encased structures (referring to Fig. 1), comprise steel pipe column 103 and concrete, be provided at predetermined intervals a plurality of reinforcement diaphragms 104 in steel pipe column 103, each strengthens offering a circular pouring hole on diaphragm 104; Below each strengthens diaphragm 104, along the periphery of steel pipe column 103, offer a plurality of steam vents 105; Concrete is uniformly distributed in steel pipe column 104.Preferably, the length of steel pipe column 104 is in the scope of 6m～15m, and predetermined space is in the scope of 1.5m～3m, and the diameter of pouring hole is in the scope of 200 mm～400mm, and the concrete slump is less than 120mm.Preferably, a plurality of steam vents 105 are evenly laid along the periphery of described steel pipe column 103, and a plurality of steam vents 105 and the corresponding vertical distance of strengthening between diaphragm 104 are less than 0.1m, and the diameter of a plurality of steam vent 105 is 5mm.
According to a kind of scheme, steel pipe column 103 has rectangular cross section, and the size of rectangular cross section is in the scope of 400mm * 400mm～1000mm * 1000mm.
According to another kind of scheme, steel pipe column 103 has circular cross section, and the diameter of circular cross section is in the scope of 400mm～1000mm.
Adopt concrete pouring construction technique of the present utility model at least can bring following benefit:
1. in steel pipe column, operated by rotary motion has diaphragm in multiple tracks, and the conventional construction method concreting is difficult to successfully, adopts the utility model, can guarantee the pouring quality of post inner concrete.
2. method described in the utility model is low to the quality requirement of concrete raw material, easily controls concrete quality during cast, and is applicable to the steel core concrete column of any height, cost-saving.
3. the utility model need to not offered the hole (pump line connecting hole and overflow pressure relief vent) of same Diameter of pump tube on steel pipe walls, thereby avoids weakening the globality of steel pipe column steel plate.
4. construction technology of the present utility model is simple, builds with the equipment requirement that vibrates lowly, and the construction period is short, material economy, and conveying equipment requires lower, and can save the concrete pumping expense.
5. steel pipe itself is good reinforcing bar load-bearing skeleton, has removed the series of process processes such as formed reinforcing steel bars from, has simplified construction technology.And steel pipe itself is exactly good anti-side pressure template.Therefore during placing of concrete, can save a large amount of formworks, form removal is artificial and material.
Below material and equipment that the utility model is used briefly introduced.
The concrete raw material that concreting method of the present utility model adopts comprise: cement, coarse aggregate, fines, active admixture and chemical admixture, specific as follows:
Cement: preferred high-grade Portland cement more than 42.5 grades; Water-cement ratio is controlled at below 0.4;
Coarse aggregate: preferred second-time breakage stone, continuous grading, maximum particle diameter, below 40mm, and is not more than 1/3 of catheter diameter;
Fines: preferred class circular granular, thick river sand in fineness modulus >=2.5 natural, sand coarse aggregate ratio 35%～40%;
Active admixture: can mix people's flyash or ground blast furnace slag, can effectively improve the service behaviour of concrete mix;
Chemical admixture: generally should mix high efficiency water reducing agent and micro-expanding agent, the purpose of mixing micro-expanding agent is to make the concrete microdilatancy, and compensate for shrinkage avoids concrete and steel pipe walls to throw off.
In addition, the steel tube concrete local product adopts compensate for shrinkage or without shrinking contour performance concrete.Match ratio can be according to concrete design strength rating calculation, and determines by test.Can in concrete mix, mix active blending material, water reducing agent, expansion agent, to reach, reduce shrinkage factor, reduce bleeding rate, improve the purpose such as workability.The construction of steel pipe column inner concrete tremie placing method should adopt commercial concrete, concrete filled steel tube intensity higher (generally more than C40), and scene is difficult to meet the demands from mixing usually.And single-unit pillar primary concreting amount is less, should not adopt pumping, should adopt the transportation of tower crane hopper.
Main plant is as shown in the table:
| Title | Specifications and models | Power (kW) | Quantity |
| Tower crane | QTZ80 | 55 | 1 |
| Poker vibrator | ZN-1 | 1.5 | 2 |
| Concrete delivery truck | SY5256GJB | ? | 3 |
| Conduit and joint | Φ150mm | ? | Some |
| The concrete supersonic reflectoscope | U-Sonic | ? | 1 |
Other plant also comprises hopper, slump cylinder, concrete test die, wire rope, iron hammer etc.
Below the quality controling mode of construction technology of the present utility model is briefly introduced.
Detection of construction quality is according to being: " concrete structure engineering construction quality standards of acceptance " GB50204; " concrete-filled rectangular steel tube structure technology rules " CECS159; " code for acceptance of construction quality of steel structures " GB50205; " Standard for inspection and assessment of strength of concrete " GB50107; " concrete filled steel tube engineering construction quality standards of acceptance " GB50628.
Concrete filled steel tube cement used, stone, sand, water, admixture, etc. raw material need meet corresponding country and industry standard.Should often detect gravel size, mud content, moisture content etc. in the concrete mixing process, and adjust in time match ratio according to testing result.In concreting process, should there is the special messenger to be responsible for the slump and detect, and the making of test block, keeping, maintenance, censorship work, and should make in accordance with regulations maintaining test block with same condition.
The pouring quality of steel pipe column inner concrete, the method that can knock steel plate with iron hammer is made trial inspection.For important component and position, also need to adopt supercritical ultrasonics technology to be detected.Find the position of cacophonia for the hammering method inspection, can further detect by ultrasonic method.If find that concrete has uncompacted position, can adopt the localized borehole mud jacking to carry out reinforcement, the repair welding sealing of then holing.
Below the safety measure of construction technology of the present utility model is briefly introduced.
The code requirement of construction safety: the regulation that should follow " construction safety check criteria " JGJ59, " building operations high-rise working technical specification of security " JGJ80, " job site temporary electricity technical specification of security " JGJ46 and local relevant job site production safety management.
Other safety measures:
The capital operating platform is answered safety and firmness, and girder steel has reliable connection, and the safe protective railing of the above height of 1.2m is set.
Operating personnel on the capital operating platform construction of should fastening the safety belt.When wind speed reaches more than six grades, should stop work high above the ground.
Before concreting, the reply vibrating head carries out test running, and operating personnel should wear insulating glove, wear insulating boot.
In the utility model, for specific embodiment, principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and thought thereof; For one of ordinary skill in the art, according to thought of the present utility model, can expect many changes or modification, and these changes or modification all fall into protection domain of the present utility model.
Claims (8)
1. an encased structures, comprise steel pipe column and concrete, it is characterized in that,
Be provided at predetermined intervals a plurality of reinforcement diaphragms in described steel pipe column, on each described reinforcement diaphragm, offered a circular pouring hole;
Below each described reinforcement diaphragm, along the periphery of described steel pipe column, offer a plurality of steam vents;
Described concrete is uniformly distributed in described steel pipe column.
2. encased structures according to claim 1, is characterized in that, the length of described steel pipe column is in the scope of 6m～15m.
3. encased structures according to claim 1, is characterized in that, described predetermined space is in the scope of 1.5m～3m.
4. encased structures according to claim 1, is characterized in that, the diameter of described pouring hole is in the scope of 200 mm～400mm.
5. encased structures according to claim 1, is characterized in that, described steel pipe column has rectangular cross section, and the size of described rectangular cross section is in the scope of 400mm * 400mm～1000mm * 1000mm.
6. encased structures according to claim 1, is characterized in that, described steel pipe column has circular cross section, and the diameter of described circular cross section is in the scope of 400mm～1000mm.
7. encased structures according to claim 1, it is characterized in that, described a plurality of steam vent is evenly laid along the periphery of described steel pipe column, and the vertical distance between described a plurality of steam vents and corresponding described reinforcement diaphragm is less than 0.1m, and the diameter of described a plurality of steam vents is 5mm.
8. encased structures according to claim 1, is characterized in that, the described concrete slump is less than 120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013204042150U CN203320810U (en) | 2013-07-09 | 2013-07-09 | Steel tube concrete structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013204042150U CN203320810U (en) | 2013-07-09 | 2013-07-09 | Steel tube concrete structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612330A (en) * | 2015-01-06 | 2015-05-13 | 北京工业大学 | Embedded cap type prestressed steel pipe concrete member and secondary position control loading pressure forming method thereof |
| CN110700487A (en) * | 2019-09-26 | 2020-01-17 | 中国农业大学 | Steel pipe rockfill rubber concrete structure and construction method thereof |
-
2013
- 2013-07-09 CN CN2013204042150U patent/CN203320810U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612330A (en) * | 2015-01-06 | 2015-05-13 | 北京工业大学 | Embedded cap type prestressed steel pipe concrete member and secondary position control loading pressure forming method thereof |
| CN110700487A (en) * | 2019-09-26 | 2020-01-17 | 中国农业大学 | Steel pipe rockfill rubber concrete structure and construction method thereof |
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