CN215253965U - Steel pipe concrete combined column - Google Patents
Steel pipe concrete combined column Download PDFInfo
- Publication number
- CN215253965U CN215253965U CN202022549906.2U CN202022549906U CN215253965U CN 215253965 U CN215253965 U CN 215253965U CN 202022549906 U CN202022549906 U CN 202022549906U CN 215253965 U CN215253965 U CN 215253965U
- Authority
- CN
- China
- Prior art keywords
- steel
- concrete
- pipe
- stainless steel
- tube
- 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.)
- Active
Links
Images
Landscapes
- Rod-Shaped Construction Members (AREA)
Abstract
The utility model relates to a steel pipe concrete combination column, its characterized in that: the steel tube comprises a stainless steel outer steel tube and a carbon steel inner steel tube concentrically arranged in the stainless steel outer steel tube, wherein the pipe diameter of the carbon steel inner steel tube is smaller than that of the stainless steel outer steel tube, steel first concrete is poured in an inner cavity formed in the carbon steel inner steel tube, and steel slag light aggregate concrete is poured in an annular partition cavity formed between the carbon steel inner steel tube and the stainless steel outer steel; the lower parts of the stainless steel outer steel pipe and the carbon steel inner steel pipe extend into the inner cavity from the outside of the stainless steel outer steel pipe and are provided with concrete filling pipes, and the concrete filling pipes are provided with at least one discharge hole. The utility model discloses stainless steel tube concrete combination column ductility is good, and the power consumption ability is strong, is fit for being used in the higher area of requirement of earthquake fortification.
Description
The technical field is as follows:
the utility model relates to a novel steel pipe concrete combination column filled with steel slag and waste glass concrete.
Background art:
"Green concrete" is being vigorously researched and developed in China to promote transformation and upgrade of the construction industry, and the so-called "green concrete" is a novel energy-saving concrete mainly considering the combination of concrete with environmental protection, ecological protection and sustainable development; in a series of approaches for developing green concrete, artificial aggregates are vigorously developed, and particularly, waste materials such as industrial solid waste materials, light weight aggregates produced and manufactured by the production of municipal solid waste, waste concrete of old buildings and structures, bricks, tiles and the like are utilized to replace natural aggregates and even cement required in concrete preparation, so that the consumption of natural sand stones and cement is reduced, and the energy consumption is reduced, and the environment is protected.
The steel slag is one of the main waste residues in the steel industry, the discharge of the steel slag is increased year by year along with the gradual increase of the steel yield, and although researches find that the steel slag used as a coarse and fine aggregate of concrete can achieve or even be superior to the mechanical property of natural aggregate concrete, the instability problem of volume expansion of the concrete product can be caused if the free calcium oxide/magnesium in the steel slag is improperly controlled; although such problems can be reduced by methods such as warm water curing, steel slag aging, hot slag treatment, and ground aggregates, the potential risk of instability has hindered the spread of steel slag concrete in practical projects.
The glass is widely applied to engineering construction and daily life of people, but nearly 50 percent of glass cannot be recycled to generate a large amount of glass waste; because the waste glass is not biodegradable, if the waste glass can be reasonably and effectively used as building resources, the cost can be reduced, and the environment can be protected; researches find that the waste glass can replace natural coarse and fine aggregates in common concrete, and the related mechanical properties of the waste glass can be equivalent to those of the common concrete on the premise of controlling the replacement amount of the waste glass; however, Alkali Silicate Reaction (ASR) of the waste glass aggregate is easy to generate in concrete, so that the concrete has the problem of volume expansion, and the waste glass aggregate is also popularized and buried in engineering application.
As one of the main forms threatening the public safety of buildings, the fire disaster brings about great loss to the life and property safety of people every year, and the high-temperature environment under the fire disaster can cause the materials of the building structure to be damaged in different degrees, thereby affecting the structural stress of the building structure and finally affecting the safety of the building structure; the mechanical property of the concrete material at high temperature depends on the materials and the mixture ratio of the aggregate, the admixture and the cementing material, while the natural macadam and river sand aggregate used in the common concrete are easy to damage at high temperature to influence the fire resistance of the concrete; the steel slag mentioned above is one of the products of steel making, and the performance of the steel slag is stable and not easy to be damaged at high temperature, while the waste glass is easy to soften at high temperature and fill micro cracks in concrete under the action of external force if being used as the aggregate of the concrete, thereby improving the stability of the concrete at high temperature and enhancing the strength of the concrete.
Stainless steel is increasingly used in engineering structures with excellent corrosion resistance and excellent mechanical properties combined with an aesthetically pleasing surface with great visual impact, at present, the stainless steel used in the engineering structure is mainly austenite type, ferrite type and austenite-ferrite dual-phase stainless steel, the austenite stainless steel has excellent corrosion resistance, oxidation resistance and welding performance, although the stainless steel which is the most widely used at present has low strength, the ferritic stainless steel has high strength, but the ductility, cold formability, weldability, corrosion resistance and other properties are not as good as those of austenitic stainless steel, and the austenitic-ferritic dual-phase stainless steel has better corrosion resistance and strength than austenitic stainless steel, has good ductility and weldability, is the stainless steel which is most widely applied to the current engineering structure, but the relatively high price also limits the wide application; a novel QN series high-nitrogen nickel-saving austenitic stainless steel is provided in the market in 2018, the corrosion resistance of the novel QN series high-nitrogen nickel-saving austenitic stainless steel is equivalent to that of common austenitic stainless steel, but the novel QN series high-nitrogen nickel-saving austenitic stainless steel has higher strength and lower manufacturing cost, and can be widely popularized and applied to engineering structures.
The steel pipe concrete structure is a structural form which has the widest development prospect at present, meets the technical requirements of modern construction and can meet the requirements of large span, high rise, heavy load and severe conditions, the steel pipe concrete can utilize the interaction of two materials of an outer steel pipe and core concrete in the stress process to play the unique combined action, namely the steel pipe restrains the core concrete to improve the strength and the plasticity and the toughness of the core concrete, and meanwhile, the concrete can delay the premature local buckling of the steel pipe; in addition, the steel pipe can also be used as a template for pouring core concrete in the construction process so as to save the manufacturing cost and improve the construction speed, but because the steel pipe is exposed, the necessary anticorrosion and fireproof protection needs to be carried out on the outer steel pipe in the prior practical engineering application so as to meet the related design requirements.
The invention content is as follows:
in view of the not enough of prior art, the utility model aims to provide a novel steel core concrete composite column of packing slag glass concrete, novel steel core concrete composite column of packing slag glass concrete is not only simple structure, practicality strong and construction cost reduce, still can use slag and waste glass aggregate concrete safely effectively, effectively improves limit bearing capacity, ductility and the fire resistance of composite column, and then realizes the stainless steel core concrete column that need not the anticorrosive protection of fire prevention.
The utility model discloses pack steel pipe concrete combination column of slag glass reinforced plastic, its characterized in that: the steel tube comprises a stainless steel outer steel tube and a carbon steel inner steel tube concentrically arranged in the stainless steel outer steel tube, wherein the pipe diameter of the carbon steel inner steel tube is smaller than that of the stainless steel outer steel tube, steel slag and waste glass aggregate concrete are poured in an inner cavity formed in the carbon steel inner steel tube, and steel slag lightweight aggregate concrete is poured in an annular partition cavity formed between the carbon steel inner steel tube and the stainless steel outer steel; the lower parts of the stainless steel outer steel pipe and the carbon steel inner steel pipe extend into the inner cavity from the outside of the stainless steel outer steel pipe and are provided with concrete filling pipes, and the concrete filling pipes are provided with at least one discharge hole.
Further, the sections of the stainless steel outer tube and the carbon steel inner tube are circular.
Furthermore, the sections of the stainless steel outer steel pipe and the carbon steel inner steel pipe are square.
Furthermore, the stainless steel outer steel pipe is austenitic stainless steel QN1803, and the carbon steel inner steel pipe is Q345 carbon steel.
Further, the ratio of the area A enclosed by the carbon steel inner steel tube to the area B enclosed by the stainless steel outer steel tube is λ, λ = 0.6-0.8.
Furthermore, the rotatable pouring gun head is sleeved in the concrete pouring pipe body, the pouring gun head is a pipe barrel body matched with the concrete pouring pipe, and a feeding hole matched with the discharging hole is formed in the pipe barrel body.
The utility model discloses a preparation method of steel pipe concrete combination column of packing slag glass reinforced plastic concrete, its characterized in that: the novel steel tube concrete combined column filled with steel slag and waste glass concrete comprises a stainless steel outer steel tube and a carbon steel inner steel tube concentrically arranged in the stainless steel outer steel tube, wherein the pipe diameter of the carbon steel inner steel tube is smaller than that of the stainless steel outer steel tube, steel slag and waste glass aggregate concrete are poured in an inner cavity formed in the carbon steel inner steel tube, and steel slag light aggregate concrete is poured in a separation cavity formed between the carbon steel inner steel tube and the stainless steel outer steel; the lower parts of the stainless steel outer steel pipe and the carbon steel inner steel pipe extend into the inner cavity from the outside of the stainless steel outer steel pipe and are provided with concrete pouring pipes, and the concrete pouring pipes are provided with at least one discharge hole; during preparation, 1) according to construction requirements, the ratio of the area A enclosed by the carbon steel inner steel pipe to the area B enclosed by the stainless steel outer steel pipe is lambda; the lambda is 0.6-0.8, and the diameters and the thicknesses of the stainless steel outer steel pipe and the carbon steel inner steel pipe are determined according to the bearing capacity design;
2) hoisting the carbon steel inner steel pipe to an installation position and carrying out verticality verification to ensure that the carbon steel inner steel pipe is vertically placed, avoiding inclination, and positioning the central point of the carbon steel inner steel pipe by using a total station through an engineering control network;
3) hoisting the stainless steel outer steel pipe according to the measured center point of the carbon steel inner steel pipe by a conventional method, and ensuring that the stainless steel outer steel pipe and the carbon steel inner steel pipe are concentrically arranged;
4) pumping mortar to lubricate the conveying pipeline before the pouring gun head of the concrete conveying pipe is connected with the concrete pouring pipe, and performing concrete pouring on the combined column after cleaning the mortar;
5) after the preparation is ready, adjusting a feed inlet of the pouring gun head to coincide with a discharge outlet of the concrete pouring pipe, and pouring steel slag and waste glass aggregate concrete into the carbon steel inner steel pipe; stopping the pump in time after the concrete is jacked to the top of the column, and pumping back for a plurality of times until the concrete surface at the top of the column does not drop back obviously;
6) after the concrete pouring in the carbon steel inner steel tube is finished, repeating the step 4, adjusting a feeding hole of the pouring gun head to be superposed with a discharging hole of the concrete pouring tube, and pouring steel slag lightweight aggregate concrete in an annular cavity between the stainless steel outer steel tube and the carbon steel inner steel tube; after the concrete is jacked to the top of the column, the pump is stopped in time and pumped back for a plurality of times until the concrete surface at the top of the column does not drop back obviously, and the concrete conveying pipe can be closed and dismantled;
7) thirty minutes after pouring, observing whether the concrete at the top of the column falls back or sinks, and if so, manually pouring the corresponding concrete at the top of the column;
8) after the steel slag and waste glass aggregate concrete and the steel slag lightweight aggregate concrete are integrally poured, respectively curing the water-quenched steel slag lightweight aggregate concrete between the stainless steel outer steel tube and the carbon steel inner steel tube and the steel slag and waste glass aggregate concrete in the carbon steel inner steel tube; in order to prevent the loss of water in the combined column in the maintenance process, a layer of epoxy resin is coated on the surface of the end part of the poured combined column, and the combined column is maintained until the steel slag and the waste glass concrete are completely condensed and hardened;
9) the steel slag lightweight aggregate concrete is cured by adopting a curing film wrapping curing method, namely, the curing film is wrapped and adhered on the surface of the steel slag lightweight aggregate concrete, so that the steel slag lightweight aggregate concrete keeps moist and the surface of the steel slag lightweight aggregate concrete is prevented from forming accumulated water, and the curing period is three days;
10) and cutting off the exposed part of the concrete filling pipe at the bottom of the column after three days of maintenance, respectively welding the upper carbon steel inner steel pipe and the upper stainless steel outer steel pipe, and repeating the steps to obtain the novel fire-resistant corrosion-resistant stainless steel pipe concrete composite column.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the steel slag and waste glass concrete are safely used, and potential expansion risks are converted into contribution of constraint force; 2) the performance is improved, and the ultimate bearing capacity, the ductility and the fire resistance of the novel concrete-filled steel tube combined column are effectively improved compared with those of a common concrete-filled steel tube column; 3) better economic durability, and the reasonable configuration of the stainless steel outer steel pipe and the carbon steel inner steel pipe improves the corrosion resistance of the combined column and effectively reduces the manufacturing cost; 4) the building is attractive, the fire resistance limit of the combined column is improved and meets the fire resistance limit requirement specified by the corresponding design specification, so that a necessary fire-proof coating is omitted, and the attractive structure facade effect of the stainless steel is further highlighted; 5) the steel slag and waste glass aggregate are used for replacing natural aggregate in concrete safely and effectively, so that the problem of disposal of waste materials such as the steel slag, the waste glass and the like is solved effectively, and the environmental pollution is reduced; the steel slag and the waste glass are safely used as natural aggregates for replacement, the cost is reduced, the exploitation of natural sand and stone is reduced, natural resources are saved, and the method conforms to the policy of ecological civilization construction.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Description of the drawings:
FIG. 1 is a perspective view of the concrete-filled stainless steel tube composite column of the present invention;
FIG. 2 is a cross-sectional view of an embodiment A-A of the concrete filled stainless steel tube composite column of the present invention;
FIG. 3 is a cross-sectional view of another embodiment A-A of the concrete filled stainless steel tube composite column of the present invention;
FIG. 4 is a cross-sectional view of the lower part of the concrete-filled stainless steel tube composite column of the present invention;
FIG. 5 is a cross-sectional view of a casting gun head intended to be fitted into a concrete casting tube;
fig. 6 is a sectional view of the concrete-filled stainless steel tube composite column of the present invention.
The specific implementation mode is as follows:
in order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The utility model discloses pack steel core concrete combination column of slag waste glass concrete includes outer steel pipe 1 of stainless steel and establishes steel pipe 3 in the inside carbon steel of outer steel pipe of stainless steel with one heart, the pipe diameter of steel pipe 3 is less than the pipe diameter of outer steel pipe 1 of stainless steel in the carbon steel, steel slag and waste glass aggregate concrete 4 (definition steel slag and waste glass aggregate concrete are first concrete) have been pour to the internal inner chamber 6 that forms of steel pipe 3 in the carbon steel, steel slag lightweight aggregate concrete 2 has been pour to the ring partition chamber 7 that forms between steel pipe 3 and the outer steel 1 of stainless steel in the carbon steel.
The lower parts of the stainless steel outer steel tube 1 and the carbon steel inner steel tube 3 extend into an inner cavity from the outside of the stainless steel outer steel tube to form a concrete pouring tube 5, at least one discharge port 9 is formed in the concrete pouring tube 5, a rotatable pouring gun head 8 is sleeved in the concrete pouring tube 5, the pouring gun head 8 is a tube body matched with the concrete pouring tube, a feed port 10 matched with the discharge port 9 is formed in the tube body, the inner end of the concrete pouring tube 5 is closed, the outer end of the concrete pouring tube 5 is opened (the outer end of the concrete pouring tube is opened so as to be sleeved with the pouring gun head 8, the inner end of the pouring gun head 8 is also closed, the outer end of the concrete pouring tube is opened so as to be convenient for inputting slurry), two discharge ports 9 arranged at intervals are formed in the concrete pouring tube 5, the two discharge ports 9 respectively fall in the ranges of the inner cavity 6 and the ring separation cavity 7, and the two discharge ports 9 are staggered by 90 degrees in the circumferential direction of the concrete pouring tube 5; the two feeding holes 10 of the casting gun head 8 are arranged at intervals in the axial direction and both fall in the ranges of the inner cavity 6 and the annular partition cavity 7, the two feeding holes 10 of the casting gun head 8 are not staggered in the circumferential direction of the tube body, when the steel slag and waste glass aggregate concrete 4 of the inner cavity 6 need to be cast in use, the feeding holes 10 of the casting gun head 8 falling in the range of the inner cavity 6 are rotated and correspond to the discharge holes 9 on the concrete pouring tube 5, so that the steel slag and the waste glass aggregate concrete 4 can be fed into the inner cavity 6, and at the moment, the feeding holes of the casting gun head 8 falling in the range of the annular partition cavity 7 and the discharge holes 9 on the concrete pouring tube 5 are staggered by 90 degrees (45-180 degrees), so that the feeding into the annular partition cavity 7 cannot be carried out; when the steel slag light aggregate concrete 2 in the ring separation cavity 7 needs to be poured, the feeding hole 10 of the pouring gun head 8 falling within the range of the ring separation cavity 7 is rotated and corresponds to the upper discharging hole 9 of the concrete pouring pipe 5, so that the steel slag light aggregate concrete 2 can be fed into the ring separation cavity 7, and at the moment, the feeding hole of the pouring gun head 8 falling within the range of the inner cavity 6 and the discharging hole 9 of the concrete pouring pipe 5 are staggered by 90 degrees (staggered by 45-180 degrees), so that the feeding into the inner cavity 6 cannot be realized.
For the convenience of manufacture, the sections of the stainless steel outer steel pipe and the carbon steel inner steel pipe are round or square.
In order to design reasonably, the stainless steel outer steel pipe is austenitic stainless steel QN1803, and the carbon steel inner steel pipe is Q345 carbon steel.
Further, the ratio of the area A enclosed by the carbon steel inner steel tube to the area B enclosed by the stainless steel outer steel tube is λ, λ = 0.6-0.8.
The utility model discloses a novel steel tube concrete combination column of packing slag waste glass concrete, novel steel tube concrete combination column of packing slag waste glass concrete include stainless steel outer steel pipe and establish the carbon steel inner steel pipe in stainless steel outer steel pipe with one heart, the pipe diameter of carbon steel inner steel pipe is less than the pipe diameter of stainless steel outer steel pipe, steel slag and waste glass aggregate concrete are poured to the inner chamber that forms in the carbon steel inner steel pipe, the steel slag lightweight aggregate concrete is poured to the separate chamber that forms between carbon steel inner steel pipe and the stainless steel outer steel; the lower parts of the stainless steel outer steel pipe and the carbon steel inner steel pipe extend into the inner cavity from the outside of the stainless steel outer steel pipe and are provided with concrete pouring pipes, and the concrete pouring pipes are provided with at least one discharge hole; during preparation, 1) according to construction requirements, the ratio of the area A enclosed by the carbon steel inner steel pipe to the area B enclosed by the stainless steel outer steel pipe is lambda; the lambda is 0.6-0.8, and the diameters and the thicknesses of the stainless steel outer steel pipe and the carbon steel inner steel pipe are determined according to the bearing capacity design;
2) hoisting the carbon steel inner steel pipe to an installation position and carrying out verticality verification to ensure that the carbon steel inner steel pipe is vertically placed, avoiding inclination, and positioning the central point of the carbon steel inner steel pipe by using a total station through an engineering control network;
3) hoisting the stainless steel outer steel pipe according to the measured center point of the carbon steel inner steel pipe by a conventional method, and ensuring that the stainless steel outer steel pipe and the carbon steel inner steel pipe are concentrically arranged;
4) pumping mortar to lubricate the conveying pipeline before the pouring gun head of the concrete conveying pipe is connected with the concrete pouring pipe, and performing concrete pouring on the combined column after cleaning the mortar;
5) after the preparation is ready, adjusting a feed inlet of the pouring gun head to coincide with a discharge outlet of the concrete pouring pipe, and pouring steel slag and waste glass aggregate concrete into the carbon steel inner steel pipe; stopping the pump in time after the concrete is jacked to the top of the column, and pumping back for a plurality of times until the concrete surface at the top of the column does not drop back obviously;
6) after the concrete pouring in the carbon steel inner steel tube is finished, repeating the step 4, adjusting a feeding hole of the pouring gun head to be superposed with a discharging hole of the concrete pouring tube, and pouring steel slag lightweight aggregate concrete in an annular cavity between the stainless steel outer steel tube and the carbon steel inner steel tube; after the concrete is jacked to the top of the column, the pump is stopped in time and pumped back for a plurality of times until the concrete surface at the top of the column does not drop back obviously, and the concrete conveying pipe can be closed and dismantled;
7) thirty minutes after pouring, observing whether the concrete at the top of the column falls back or sinks, and if so, manually pouring the corresponding concrete at the top of the column;
8) after the steel slag and waste glass aggregate concrete and the steel slag lightweight aggregate concrete are integrally poured, respectively curing the water-quenched steel slag lightweight aggregate concrete between the stainless steel outer steel tube and the carbon steel inner steel tube and the steel slag and waste glass aggregate concrete in the carbon steel inner steel tube; in order to prevent the loss of water in the combined column in the maintenance process, a layer of epoxy resin is coated on the surface of the end part of the poured combined column, and the combined column is maintained until the steel slag and the waste glass concrete are completely condensed and hardened;
9) the steel slag lightweight aggregate concrete is cured by adopting a curing film wrapping curing method, namely, the curing film is wrapped and adhered on the surface of the steel slag lightweight aggregate concrete, so that the steel slag lightweight aggregate concrete keeps moist and the surface of the steel slag lightweight aggregate concrete is prevented from forming accumulated water, and the curing period is three days;
10) and cutting off the exposed part of the concrete filling pipe at the bottom of the column after three days of maintenance, respectively welding the upper carbon steel inner steel pipe and the upper stainless steel outer steel pipe, and repeating the steps to obtain the novel fire-resistant corrosion-resistant stainless steel pipe concrete composite column.
The utility model discloses mainly there is following usage:
1) the novel stainless steel tube concrete combined column has good ductility and strong energy consumption capability, and is suitable for being used in areas with higher requirements on earthquake fortification. 2) Buildings with higher requirements on corrosion resistance and durability of the structure. The utility model discloses make full use of novel QN series stainless steel advantage that the ability of anticorrosion is strong, applicable like water conservancy harbour and coastal building. 3) High-rise buildings and super high-rise buildings. 4) The combined column has high bearing capacity, and the section size of the combined column can be reasonably reduced.
Taking a square section with the height of the concrete combined column of 8m as an example:
the novel fire-resistant corrosion-resistant stainless steel pipe concrete combination column comprises a stainless steel outer steel pipe and a carbon steel inner steel pipe, wherein the stainless steel outer steel pipe is made of novel QN series austenitic stainless steel QN1803, and the carbon steel inner steel pipe is made of Q345 carbon steel; the stainless steel outer steel pipe and the carbon steel inner steel pipe are concentrically arranged, steel slag lightweight aggregate concrete is poured between the inner steel pipe and the outer steel pipe, and steel slag and waste glass aggregate concrete are poured in the carbon steel inner steel pipe; and the inner wall of the stainless steel outer steel pipe is provided with threads.
The preparation method of the novel fire-resistant corrosion-resistant stainless steel tube concrete composite column comprises the following steps:
(1) preparing concrete:
the raw materials used in the examples are:
preparing steel slag lightweight aggregate concrete:
1) fully mixing cement, steel slag lightweight aggregate, natural sand and water in a concrete mixer according to the proportion;
2) adding the water in parts by weight, and fully stirring for 10-15 min;
3) adding the water reducing agent in parts by weight, and fully stirring until the mixture is uniformly mixed;
4) and taking out the concrete to obtain the steel slag lightweight aggregate concrete.
Preparation of steel slag and waste glass aggregate concrete:
1) fully mixing cement, coarse steel slag, fine steel slag, glass and natural sand in a concrete mixer according to the proportion;
2) adding the water in parts by weight, and fully stirring for 10-15 min;
3) adding the water reducing agent in parts by weight, and fully stirring until the mixture is uniformly mixed;
4) and taking out of the tank to obtain the steel slag and waste glass aggregate concrete.
(2) Preparation of novel fire-resistant corrosion-resistant stainless steel tube concrete combined column
1) According to construction requirements, according to the ratio lambda (lambda is recommended to be 0.6-0.8) of the area A enclosed by the carbon steel inner steel pipe and the area B enclosed by the stainless steel outer steel pipe 1, and simultaneously, the diameters and the thicknesses of the stainless steel outer steel pipe and the carbon steel inner steel pipe are designed according to bearing capacity;
2) hoisting the carbon steel inner steel pipe to an installation position and carrying out verticality verification to ensure that the carbon steel inner steel pipe is vertically placed, avoiding inclination, and positioning the central point of the carbon steel inner steel pipe by using a total station through an engineering control network;
3) hoisting the stainless steel outer steel pipe according to the measured center point of the carbon steel inner steel pipe by a conventional method, and ensuring that the stainless steel outer steel pipe and the carbon steel inner steel pipe are concentrically arranged;
4) pumping mortar to lubricate the conveying pipeline before the pouring gun head of the concrete conveying pipe is connected with a concrete pouring port, and performing concrete pouring on the combined column after cleaning the mortar;
5) after the concrete is lifted to the top of the column, stopping a pump in time, and performing pumping back for a plurality of times until the concrete surface at the top of the column does not drop obviously;
6) after the concrete in the carbon steel inner steel tube is poured, repeating the step 4, then adjusting to ensure that a second feeding hole and a second discharging hole (both are the discharging holes far away from the inner end, and the inner end refers to the side of the tube body close to the inner cavity) are superposed, and pouring steel slag lightweight aggregate concrete into the annular space between the stainless steel outer steel tube and the carbon steel inner steel tube; after the concrete is jacked to the top of the column, the pump is stopped in time and pumped back for a plurality of times until the concrete surface at the top of the column does not drop back obviously, and the concrete conveying pipe can be closed and dismantled;
7) thirty minutes after pouring, observing whether the concrete at the top of the column falls back or sinks, and if so, manually pouring the corresponding concrete at the top of the column;
8) after the steel slag and waste glass aggregate concrete and the steel slag lightweight aggregate concrete are integrally poured, respectively curing the water-quenched steel slag lightweight aggregate concrete between the stainless steel outer steel tube and the carbon steel inner steel tube and the steel slag and waste glass aggregate concrete in the carbon steel inner steel tube; in order to prevent the loss of water in the combined column in the maintenance process, a layer of epoxy resin is coated on the surface of the end part of the poured combined column, and the combined column is maintained until the steel slag and the waste glass concrete are completely condensed and hardened;
9) the steel slag light aggregate concrete is maintained by adopting a maintenance film wrapping maintenance method, namely, the maintenance film is wrapped and adhered on the surface of the steel slag light aggregate concrete, so that the steel slag light aggregate concrete keeps moist and the surface of the steel slag light aggregate concrete is prevented from forming accumulated water, and the maintenance period is three days.
10) And cutting off the exposed part of the one-way valve at the bottom of the column after three days of maintenance, welding new carbon steel inner steel tubes and stainless steel outer steel tubes at the upper part in a distributed manner, and repeating the steps to obtain the novel fire-resistant corrosion-resistant stainless steel tube concrete composite column.
Compared with the prior art, the utility model discloses following beneficial effect has:
the steel slag and waste glass concrete are safely used, and potential expansion risks are converted into contribution of constraint force; 2) the performance is improved, and the ultimate bearing capacity, the ductility and the fire resistance of the novel concrete-filled steel tube combined column are effectively improved compared with those of a common concrete-filled steel tube column; 3) better economic durability, and the reasonable configuration of the stainless steel outer steel pipe and the carbon steel inner steel pipe improves the corrosion resistance of the combined column and effectively reduces the manufacturing cost; 4) the building is attractive, the fire resistance limit of the combined column is improved and meets the fire resistance limit requirement specified by the corresponding design specification, so that a necessary fire-proof coating is omitted, and the attractive structure facade effect of the stainless steel is further highlighted; 5) the steel slag and waste glass aggregate are used for replacing natural aggregate in concrete safely and effectively, so that the problem of disposal of waste materials such as the steel slag, the waste glass and the like is solved effectively, and the environmental pollution is reduced; the steel slag and the waste glass are safely used as natural aggregates for replacement, the cost is reduced, the exploitation of natural sand and stone is reduced, natural resources are saved, and the method conforms to the policy of ecological civilization construction.
The utility model discloses with slag and useless glass aggregate concrete application to in steel pipe concrete structure, the volume expansion problem of corresponding concrete not only can be lived by outer steel pipe restraint, the restraint effect of steel pipe concrete can also be improved to a certain extent, reasonably avoid the engineering application risk of slag and useless glass aggregate concrete effectively, use the outer steel pipe that the stainless steel is steel pipe concrete, its pleasing to the eye and advantage such as corrosion-resistant effectively improve structure aesthetic property and durability, reduce its maintenance cost, still can utilize the strain hardening characteristic of stainless steel to improve steel pipe concrete structure's plasticity and toughness performance simultaneously, and the better high temperature mechanical properties of stainless steel makes its fire resistance performance be superior to steel pipe concrete, can show to reduce fire prevention protection expense.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (7)
1. The concrete-filled steel tube combination column is characterized in that: the concrete-filled stainless steel tube comprises a stainless steel outer steel tube and a carbon steel inner steel tube concentrically arranged in the stainless steel outer steel tube, wherein the pipe diameter of the carbon steel inner steel tube is smaller than that of the stainless steel outer steel tube, first concrete is poured in an inner cavity formed in the carbon steel inner steel tube, and steel slag light aggregate concrete is poured in an annular partition cavity formed between the carbon steel inner steel tube and the stainless steel outer steel; the lower parts of the stainless steel outer steel pipe and the carbon steel inner steel pipe extend into the inner cavity from the outside of the stainless steel outer steel pipe and are provided with concrete filling pipes, and the concrete filling pipes are provided with at least one discharge hole.
2. The concrete filled steel tube composite column according to claim 1, wherein: the sections of the stainless steel outer steel pipe and the carbon steel inner steel pipe are circular.
3. The concrete filled steel tube composite column according to claim 1, wherein: the sections of the stainless steel outer steel pipe and the carbon steel inner steel pipe are square.
4. The concrete filled steel tube composite column according to claim 1, wherein: the stainless steel outer steel pipe is austenitic stainless steel QN1803, and the carbon steel inner steel pipe is Q345 carbon steel.
5. The concrete filled steel tube composite column according to claim 1, wherein: the ratio of the area A surrounded by the carbon steel inner steel pipe to the area B surrounded by the stainless steel outer steel pipe is lambda, and lambda = 0.6-0.8.
6. The concrete filled steel tube composite column according to claim 1, wherein: the concrete pouring pipe is characterized in that a rotatable pouring gun head is sleeved in the concrete pouring pipe, the pouring gun head is a pipe barrel body matched with the concrete pouring pipe, and a feeding hole matched with a discharging hole is formed in the pipe barrel body.
7. The concrete filled steel tube composite column according to claim 6, wherein: the inner end of the concrete pouring pipe is closed, the outer end of the concrete pouring pipe is opened so as to be convenient for sleeving a pouring gun head, the inner end of the pouring gun head is also closed, the outer end of the concrete pouring pipe is opened so as to be convenient for inputting slurry, the concrete pouring pipe is provided with two discharge ports which are arranged at intervals, the two discharge ports respectively fall in the range of the inner cavity and the annular separation cavity, and the two discharge ports are staggered by 90 degrees in the circumferential direction of the concrete pouring pipe; the two feeding holes of the pouring gun head are arranged at intervals in the axial direction and all fall in the range of the inner cavity and the ring separation cavity, and the two feeding holes of the pouring gun head are not staggered in the circumferential direction of the pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022549906.2U CN215253965U (en) | 2020-11-06 | 2020-11-06 | Steel pipe concrete combined column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022549906.2U CN215253965U (en) | 2020-11-06 | 2020-11-06 | Steel pipe concrete combined column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215253965U true CN215253965U (en) | 2021-12-21 |
Family
ID=79451686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022549906.2U Active CN215253965U (en) | 2020-11-06 | 2020-11-06 | Steel pipe concrete combined column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215253965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227603A (en) * | 2020-11-06 | 2021-01-15 | 福州大学 | Novel steel tube concrete combined column filled with steel slag and waste glass concrete and preparation method thereof |
-
2020
- 2020-11-06 CN CN202022549906.2U patent/CN215253965U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227603A (en) * | 2020-11-06 | 2021-01-15 | 福州大学 | Novel steel tube concrete combined column filled with steel slag and waste glass concrete and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101343871B (en) | Composite pile with high permanent stability protection layer and its production and construction method | |
| CN103224356B (en) | Green environmentally-friendly powder reinforced concrete water delivery pipe | |
| CN104294728B (en) | Prefabricated road deck of assembled RPC unreinforced and preparation method thereof | |
| CN101793055B (en) | Sea-sand concrete member and manufacturing method thereof | |
| CN108894432B (en) | Constraint regeneration block concrete column with ultra-high performance steel fiber concrete pipe | |
| CN107447646B (en) | Preparation method of steel-continuous fiber composite bar ECC-concrete composite column/pier | |
| CN102817375A (en) | Assembly type precast reinforced concrete inspection well system | |
| WO2011082605A1 (en) | Hollow steel pipe concrete column filled with sea sand concrete and method for preparing the same | |
| CN108409243B (en) | Constraint pipe cast-in-place pile for underground sulfate erosion environment and preparation method thereof | |
| CN110922118A (en) | All-light high-strength concrete for assembled components and preparation method thereof | |
| CN215253965U (en) | Steel pipe concrete combined column | |
| CN113293930A (en) | UHPC pipe restraint recycled concrete post externally pasted with FRP cloth | |
| CA2547694C (en) | Metal fiber concrete | |
| CN112227603A (en) | Novel steel tube concrete combined column filled with steel slag and waste glass concrete and preparation method thereof | |
| CN204139015U (en) | The prefabricated road slab of a kind of assembling RPC unreinforced | |
| CN109555267A (en) | A kind of complex coagulation earth pillar and preparation method thereof | |
| CN113565264A (en) | FRP-UHPFRC-concrete composite column | |
| CN107460994A (en) | Assembled steel tube high-strength concrete column and its construction method | |
| CN207211522U (en) | Assembled steel tube high-strength concrete column | |
| CN110922129A (en) | Self-fireproof ultrahigh-performance concrete for reinforcing underground structure and application thereof | |
| CN115124302A (en) | Low-temperature-rise anti-cracking corrosion-resistant large-volume concrete preparation technology and cooling-pipe-free construction method | |
| CN209722949U (en) | A kind of strong PSHC pile for prestressed pipe of superelevation | |
| CN107379363B (en) | Forming process of polymer concrete pipeline | |
| CN206467895U (en) | A kind of module-assembled component beam | |
| CN220014209U (en) | UHPC pipe-waste fiber recycled concrete-Mi-shaped steel combined pier column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |