CN102704492B - Connecting structure of section steel support and concrete support, and construction method - Google Patents
Connecting structure of section steel support and concrete support, and construction method Download PDFInfo
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- CN102704492B CN102704492B CN201210191207.2A CN201210191207A CN102704492B CN 102704492 B CN102704492 B CN 102704492B CN 201210191207 A CN201210191207 A CN 201210191207A CN 102704492 B CN102704492 B CN 102704492B
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Abstract
The invention provides a connecting structure of a section steel support and a concrete support. The connecting structure comprises an H section steel support, an H steel structure connecting piece and a reinforced concrete support, and is characterized in that the steel structure connecting piece and the reinforced concrete support are stacked together horizontally; a pre-buried connecting bolt is arranged on the reinforced concrete support; one side of the steel structure connecting piece is connected with the reinforced concrete support through the pre-buried connecting bolt in a detachable manner; and the other side of the steel structure connecting piece is connected with the section steel support through a detachable high-strength bolt. The section steel support and the reinforced concrete support are combined in a foundation pit supporting plane, reinforced concrete structures are adopted in longer diagonal braces or angle braces and irregular rim positions, and section steel structures are adopted in regular rims and the positions of shorter diagonal braces or angle braces. Connection contacts have the advantages of high shear strength, recycling and reusing of section steel and the like, are convenient and fast to connect, and can achieve the purposes of construction period reduction, construction cost reduction and low carbon and environmental protection of the foundation pit supporting engineering.
Description
Technical field
The present invention relates to technical field of civil engineering, relate in particular to inner supporting structure and the construction method of pattern foundation pit supporting structure, and the recycling of section steel material.
Background technology
In the development process of urban underground space, along with the increase of mining inetesity and area, the flat shape of its underground space changes the environmental change with periphery, is irregular polygon or arc, the situations such as planar dimension is larger, this has brought many difficult problems to foundation pit supporting project.With respect to a rectangle foundation pit that planar dimension is less, irregular polygon large scale foundation ditch, it is very difficult that the stressed and cloth of its supporting and protection structure supports, and often can cause stressed and distortion inequality, and be out of shape unmanageable difficulty.For the rectangle plane pattern foundation pit supporting structure of reduced size, the normal inner supporting structure adopting mainly contains reinforced concrete truss formula structure and steel truss formula structure.And to irregular, large scale plane pattern foundation pit supporting structure, the general reinforced concrete truss formula inner supporting structure that adopts, it is high that he has support rigidity, cloth support can be with advantages such as border change of shape, but there is the construction period longer, excavation of foundation pit difficulty, backing material is reusable not, support cost is higher, and the building waste that supporting removal produces is processed the problems such as difficult; Have easy construction although formed steel construction supports, do not need maintenance, the construction period is short, support cost is low, material can be multiplexing etc. advantage, but also there is support rigidity not high, when boundary shape is irregular, be difficult to the deficiencies such as cloth support, be not suitable for the pattern foundation pit supporting structure of large scale plane foundation ditch or concave plane.
Summary of the invention
For in out-of-shape, large-area Deep Foundation Pit Supporting Project, the braced structures material that overcomes existing pattern foundation pit supporting structure is single, support material can not reuse and the construction period long, support rigidity deficiency, the problems such as cloth support difficulty, the invention provides syndeton and the construction method thereof of a kind of type steel support and concrete support, its key is how to realize being connected of type steel support and reinforced concrete support.
For addressing the above problem, the present invention by the following technical solutions:
The syndeton of a kind of type steel support and concrete support, include H type steel support, H steel structure connecting member and reinforced concrete support, it is characterized in that, H steel structure connecting member and reinforced concrete support level are stacked together, reinforced concrete support is provided with pre-buried connecting bolt, H steel structure connecting member one side is by pre-buried connecting bolt with removably connecting reinforcement concrete support, and H steel structure connecting member opposite side is connected by detachable high-strength bolt with H type steel support.This structure is combined in H type steel support and reinforced concrete support in a pattern foundation pit supporting structure plane, long, support or angle brace and irregular boundary position are adopted to reinforced concrete structure, on regular border and shorter support or angle brace position are adopted to H formed steel construction, there is the advantages such as shear strength is large, easy to connect fast, H shaped steel reusing, reached the reduction of erection time, reduced the target of construction costs, foundation pit supporting project low-carbon environment-friendly.
H steel structure connecting member is positioned at the middle part in reinforced concrete support cross section, on two side wing edges of H steel structure connecting member, multiple bolts hole that distribute at a certain distance, the bolt hole of a side is used for connecting pre-buried connecting bolt, and the bolt hole of opposite side is used for connecting H type steel support.
Pre-buried connecting bolt passes the bolt hole on H steel structure connecting member one side wing edge, and by detachable fastening nuts.The moment of torsion that increases pre-buried connecting bolt top nut between H steel structure connecting member and reinforced concrete support, can increase the frictional resistance between H steel structure connecting member and reinforced concrete support contact.
H type steel support is provided with prepared screw-bolt hole, and high-strength bolt passes through detachable fastening nuts through the bolt hole on prepared screw-bolt hole and the H steel structure connecting member opposite side edge of a wing.The moment of torsion that increases high-strength bolt top nut between H steel structure connecting member and H type steel support, can increase the frictional resistance between H steel structure connecting member and H type steel support contact.
Pre-buried connecting bolt is in-line, L shaped or U-shaped, and pre-buried connecting bolt is connected with the reinforcing bar in reinforced concrete support.Pre-buried connecting bolt and concrete have enough adhesive surfaces, can convenience weld mutually with the reinforcing bar in reinforced concrete support.
The construction method of the syndeton of above-mentioned type steel support and concrete support, comprises the following steps:
The first step, assembling reinforcement on the position of reinforced concrete support;
Second step, in the link position levelling of H type steel support and reinforced concrete support, installs a locating rack, and H steel structure connecting member is fixed;
The 3rd step, is connected pre-buried connecting bolt one end with the bolt hole of H steel structure connecting member, the other end is connected with the reinforcing bar in reinforced concrete support;
The 4th step, at the medial and lateral of reinforced concrete support shuttering, concreting, and maintenance is to certain length of time, while reaching designing requirement intensity, with the pre-buried connecting bolt of nut screwing clamping, H steel structure connecting member is connected together with reinforced concrete support;
The 5th step, is connected H type steel support with H steel structure connecting member.
Before second step, along the grooving of reinforced concrete support position, be Construction of Supporting slot milling.
In second step, locating rack is to be fixed on the steelframe in soil layer below reinforced concrete support, and reinforced concrete support has been built rear dismountable this temporary fixed steelframe, and H steel structure connecting member is installed on locating rack.
In the 3rd step, the reinforcing bar in reinforced concrete support and pre-buried connecting bolt interconnect, and connected mode is colligation or is welded to connect.
In the 4th step, inner side template part is utilized H steel structure connecting member, and bolt hole is sealed with clay.
The edge of a wing at H steel structure connecting member respectively connects a long steel plate up and down, makes template together with the edge of a wing.
After engineering finishes, turn on the attaching nut between H steel structure connecting member and reinforced concrete support, utilize jacking device that H steel structure connecting member and reinforced concrete support are thrown off, H type steel support is hung out to recycling.Jacking device level is arranged in H steel structure connecting member, jacking device one end withstands on pre-buried connecting bolt, and the other end withstands on the edge of a wing of H steel structure connecting member, starts jacking device, using pre-buried connecting bolt as activity supporting point not, H steel structure connecting member is backed down from reinforced concrete support.
The invention has the advantages that, this connection connecting structure has the advantages such as shear strength is large, easy to connect fast, H shaped steel reusing, has reached the reduction of erection time, has reduced the object of construction costs.In the supporting of erose large scale plane foundation ditch, the advantage separately supporting in order to give full play to reinforced concrete support and formed steel construction, type steel support and concrete support are combined to application by the direction that is pattern foundation pit supporting structure development, so both can reduce the consumption of steel concrete, can, by the recycling of H shaped steel, reach the object of energy-saving and emission-reduction again.
Brief description of the drawings
Fig. 1 is the sectional drawing of the syndeton of the H type steel support that proposes of the present invention and reinforced concrete support;
Fig. 2 is the plan view of this syndeton.
Detailed description of the invention
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with diagram and specific embodiment, further set forth the present invention.
Referring to Fig. 1 and Fig. 2, many pre-buried connecting bolts 4 are set in reinforced concrete support 2, bolt hole in a row at a certain distance distributes on two side wing edges of H steel structure connecting member 3, one end of pre-buried connecting bolt 4 is connected with the reinforcing bar 5 in reinforced concrete support 2, the other end is connected with H steel structure connecting member 3, then build the concrete in reinforced concrete support 2, after maintenance certain hour, H type steel support 1 is connected by bolt 6 with H steel structure connecting member 3.
This structure is combined in H type steel support 1 and reinforced concrete support 2 in a pattern foundation pit supporting structure plane, long, support or angle brace and irregular boundary position are adopted to reinforced concrete structure, on regular border and shorter support or angle brace position are adopted to formed steel construction.This syndeton has the advantages such as shear strength is large, easy to connect fast, H shaped steel reusing, has reached the reduction of erection time, has reduced the target of construction costs, foundation pit supporting project low-carbon environment-friendly.
H steel structure connecting member 3 is positioned at the middle part in reinforced concrete support cross section, on two side wing edges of H steel structure connecting member 3, multiple bolts hole that distribute at a certain distance, the bolt hole of a side is used for connecting pre-buried connecting bolt 4, and the bolt hole of opposite side is used for connecting H type steel support 1.
Pre-buried connecting bolt 4 passes through detachable fastening nuts through the bolt hole on H steel structure connecting member 3 one side wing edges.The moment of torsion that increases connecting bolt top nut between H steel structure connecting member 3 and reinforced concrete support 2, can increase the frictional resistance between H steel structure connecting member 3 and reinforced concrete support 2 contacts.
H type steel support 1 is provided with prepared screw-bolt hole, and high-strength bolt passes through detachable fastening nuts through the bolt hole on prepared screw-bolt hole and the H steel structure connecting member opposite side edge of a wing.The moment of torsion that increases high-strength bolt top nut between H steel structure connecting member 3 and H type steel support 1, can increase the frictional resistance between H steel structure connecting member and H type steel support contact;
Described pre-buried connecting bolt 4 is in-line, L shaped or U-shaped.Pre-buried connecting bolt and concrete have enough adhesive surfaces, can convenience weld mutually with the arrangement of reinforcement on reinforced concrete support.Make H steel structure connecting member 3 there is enough bearing capacities.Pre-buried connecting bolt 4 is connected with the reinforcing bar 5 in reinforced concrete support 2.
Concrete construction method is as follows:
The first step: assembling reinforcement 5 on the position of reinforced concrete support 2, by designing requirement at the enough shear reinforcements of Reinforced Concrete Corbels position configuration.
Second step: the link position levelling at H type steel support 1 with reinforced concrete support 2, a locating rack is installed, by fixing H steel structure connecting member 3, on two side wing edges of H steel structure connecting member 3, bore multiple bolts hole.Locating rack is to be fixed on the steelframe supporting in soil layer below, and reinforced concrete support can be removed this temporary fixed steelframe after having built, and H steel structure connecting member is to be installed on locating rack.
The 3rd step: pre-buried connecting bolt 4 one end are connected with the bolt hole of H steel structure connecting member 3, and the other end is connected with the reinforcing bar 5 in reinforced concrete support, adopts welding or binding method to connect.Before second step, along reinforced concrete support 2 position groovings, be Construction of Supporting slot milling.
The 4th step: at the medial and lateral of reinforced concrete support 2 shuttering, inner side template part is utilized H steel structure connecting member 3, and the bolt hole on H formed steel construction connector is sealed with clay.Because H steel structure connecting member 3 is positioned at the middle part in reinforced concrete support 2 cross sections, convenient for formwork erection, need respectively connect up and down a long steel plate on the edge of a wing of H steel structure connecting member 3, make template together with the edge of a wing; Concreting, and maintenance is to certain length of time, while reaching designing requirement intensity, the nut screwing clamping on pre-buried connecting bolt 4 is arrived to the moment of torsion of designing requirement.
The 5th step: H type steel support 1 is connected with H steel structure connecting member 3, by the prepared screw-bolt hole on H type steel support, connects with high-strength bolt 6, the moment of torsion by nut screwing clamping to designing requirement, can realize being connected of H type steel support 1 and H steel structure connecting member 3.
By above-mentioned steps and construction method, can realize the applied in any combination of H type steel support and reinforced concrete support, this combination can not only meet the requirement of irregular large-area deep foundation pit supporting, and can give full play to the supporting advantage that this bi-material supports.
After foundation pit supporting project completes, can follow these steps to remove and recycling.
The first step: turn on the attaching nut on H steel structure connecting member 3 and reinforced concrete support 2;
Second step: level is installed a special jacking device on H steel structure connecting member 3, one end withstands on pre-buried bolt 4, and the other end withstands on the edge of a wing of H steel structure connecting member 3;
The 3rd step: start jacking device, using pre-buried connecting bolt 4 as activity supporting point not, jacking device ejects H steel structure connecting member 3 at leisure from reinforced concrete support;
The 4th step: in the time that pre-buried connecting bolt 4 is complete and H steel structure connecting member 3 is thrown off, H type steel support 1 can be hung out, can realize the recycling of section steel material.
Advantage of the present invention is as follows:
1.H shaped steel is closely connected by stone bolt with reinforced concrete beam, by harmonious ground co-operation, can stop the cripling of shaped steel, and can significantly improve the out-of-plane torsional buckling performance of shaped steel, and the steel strength of shaped steel is given full play to.
2. steel supports by being connected with shaped steel, and effectively dispersed steel supports the local compressive stress of termination, has avoided local crushing of concrete that traditional support part pressure-bearing causes not and the excessive deformation of the support causing.
3. in foundation pit supporting construction, the axle power, moment of flexure, the shearing that enclose purlin are often all very large, by the harmonious ground co-operation of shaped steel and concrete beam, can make to enclose purlin member pressurized, cut, be subject to curved bearing capacity to increase substantially, steel have been saved, reduce again the section area of member, meanwhile, also helped the distortion that reduces pit maintenance soil structure.
4. simultaneously, H shaped steel, in the side of concrete beam, in the time of placing of concrete, can double as template action, reduces the consumption of template.
5. type steel support and concrete are constituted combined support by the present invention, and the support that meets irregularly shaped foundation ditch requires (irregular be difficult to use steel support), must use reinforced concrete support.
6. dissimilar support combinations, can meet the different deformation requirements of foundation ditch periphery.
More than show and described general principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and manual, describes just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (13)
1. the syndeton of a type steel support and concrete support, include H type steel support, H steel structure connecting member and reinforced concrete support, it is characterized in that, H steel structure connecting member and reinforced concrete support level are stacked together, reinforced concrete support is provided with pre-buried connecting bolt, H steel structure connecting member one side is by pre-buried connecting bolt with removably connecting reinforcement concrete support, and H steel structure connecting member opposite side is connected by detachable high-strength bolt with H type steel support.
2. the syndeton of a kind of type steel support according to claim 1 and concrete support, it is characterized in that, H steel structure connecting member is positioned at the middle part in reinforced concrete support cross section, on two side wing edges of H steel structure connecting member, multiple bolts hole at a certain distance distribute, the bolt hole of one side is used for connecting pre-buried connecting bolt, and the bolt hole of opposite side is used for connecting H type steel support.
3. the syndeton of a kind of type steel support according to claim 2 and concrete support, is characterized in that, pre-buried connecting bolt passes the bolt hole on H steel structure connecting member one side wing edge, and by detachable fastening nuts.
4. the syndeton of a kind of type steel support according to claim 3 and concrete support, it is characterized in that, H type steel support is provided with prepared screw-bolt hole, and high-strength bolt passes through detachable fastening nuts through the bolt hole on prepared screw-bolt hole and the H steel structure connecting member opposite side edge of a wing.
5. the syndeton of a kind of type steel support according to claim 1 and concrete support, is characterized in that, pre-buried connecting bolt is in-line, L shaped or U-shaped.
6. the syndeton of a kind of type steel support according to claim 1 and concrete support, is characterized in that, pre-buried connecting bolt is connected with the reinforcing bar in reinforced concrete support.
7. a construction method for the syndeton of type steel support as claimed in claim 1 and concrete support, is characterized in that, comprises the following steps:
The first step, assembling reinforcement on the position of reinforced concrete support;
Second step, in the link position levelling of H type steel support and reinforced concrete support, installs a locating rack, and H steel structure connecting member is fixed; Locating rack is to be fixed on the steelframe in soil layer below reinforced concrete support, and reinforced concrete support has been built rear dismountable this temporary fixed steelframe, and H steel structure connecting member is installed on locating rack;
The 3rd step, is connected pre-buried connecting bolt one end with the bolt hole of H steel structure connecting member, the other end is connected with the reinforcing bar in reinforced concrete support;
The 4th step, at the medial and lateral of reinforced concrete support shuttering, concreting, and maintenance is to certain length of time, while reaching designing requirement intensity, with the pre-buried connecting bolt of nut screwing clamping, H steel structure connecting member is connected together with reinforced concrete support;
The 5th step, is connected H type steel support with H steel structure connecting member.
8. the construction method of the syndeton of a kind of type steel support according to claim 7 and concrete support, is characterized in that, before second step, along the grooving of reinforced concrete support position, is Construction of Supporting slot milling.
9. the construction method of the syndeton of a kind of type steel support according to claim 7 and concrete support, is characterized in that, in the 3rd step, the reinforcing bar in reinforced concrete support and pre-buried connecting bolt interconnect, and connected mode is colligation or is welded to connect.
10. the construction method of the syndeton of a kind of type steel support according to claim 7 and concrete support, is characterized in that, in the 4th step, inner side template part is utilized H steel structure connecting member, and bolt hole is sealed with clay.
The construction method of the syndeton of 11. a kind of type steel supports according to claim 10 and concrete support, is characterized in that, respectively connects up and down a long steel plate on the edge of a wing of H steel structure connecting member, makes template together with the edge of a wing.
The construction method of the syndeton of 12. a kind of type steel supports according to claim 7 and concrete support, it is characterized in that, after engineering finishes, turn on the attaching nut between H steel structure connecting member and reinforced concrete support, utilize jacking device that H steel structure connecting member and reinforced concrete support are thrown off, H type steel support is hung out to recycling.
The construction method of the syndeton of 13. a kind of type steel supports according to claim 12 and concrete support, it is characterized in that, jacking device level is arranged in H steel structure connecting member, jacking device one end withstands on pre-buried connecting bolt, the other end withstands on the edge of a wing of H steel structure connecting member, start jacking device, using pre-buried connecting bolt as activity supporting point not, H steel structure connecting member is backed down from reinforced concrete support.
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| CN201210191207.2A CN102704492B (en) | 2012-06-11 | 2012-06-11 | Connecting structure of section steel support and concrete support, and construction method |
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| CN201210191207.2A CN102704492B (en) | 2012-06-11 | 2012-06-11 | Connecting structure of section steel support and concrete support, and construction method |
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| CN102704492B true CN102704492B (en) | 2014-06-25 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943481A (en) * | 2012-12-12 | 2013-02-27 | 上海强劲地基工程股份有限公司 | Reinforced concrete beam and steel beam combined connecting structure for foundation pit supporting and construction method thereof |
| CN103088829B (en) * | 2013-01-30 | 2015-08-26 | 上海城建市政工程（集团）有限公司 | The construction method that in a kind of foundation ditch, concrete supports |
| CN103382720B (en) * | 2013-07-15 | 2015-06-03 | 浙江博雷重型机床制造有限公司 | Support rod |
| CN103388335B (en) * | 2013-07-26 | 2015-04-15 | 浙江博雷重型机床制造有限公司 | Bracing part |
| CN103382721B (en) * | 2013-07-26 | 2015-06-03 | 浙江博雷重型机床制造有限公司 | Connecting piece |
| CN103374919A (en) * | 2013-07-29 | 2013-10-30 | 浙江博雷重型机床制造有限公司 | Filler block for supporting system |
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Inventor after: Liu Quanlin Inventor after: Song Weimin Inventor after: Ding Qingpeng Inventor after: Fan Junyu Inventor before: Liu Quanlin Inventor before: Song Weimin Inventor before: Fan Junyu Inventor before: Zhang Han |
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