CN104234443B - A kind of corbel type reinforcement means of steel reinforced concrete member and newly-increased beam - Google Patents

A kind of corbel type reinforcement means of steel reinforced concrete member and newly-increased beam Download PDF

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Publication number
CN104234443B
CN104234443B CN201410523912.7A CN201410523912A CN104234443B CN 104234443 B CN104234443 B CN 104234443B CN 201410523912 A CN201410523912 A CN 201410523912A CN 104234443 B CN104234443 B CN 104234443B
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shaped steel
section
stirrup
reinforcing bar
concrete
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CN104234443A (en
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陈赟
严正旭
顾天熊
费继华
孙士伟
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SUZHOU ZHONGGU BUILDING SCIENCE AND TECHNOLOGY CO., LTD.
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SUZHOU ZHONGGU BUILDING TECHNOLOGY Co Ltd
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Abstract

The invention discloses a kind of corbel type reinforcement means and newly-increased beam of steel reinforced concrete member, by cutting the concrete layer of the position that needs reinforcement on former reinforcing bar concrete component, the stirrup that cut-out is exposed and reinforcing bar, at the shaped steel of former reinforcing bar concrete component, between stirrup and reinforcing bar, weld the shaped steel that corbel type is new, weld new reinforcing bar in the outside of new shaped steel, at the new stirrup of the outside of new reinforcing bar colligation, pour into a mould new concrete, obtain the newly-increased beam reinforcing the connection in steel reinforced concrete member, this corbel type reinforcement means, can save artificial and duration, only need cut steel reinforced concrete member and need fix the protective layer at bracket position, cut operation less, airborne dust, noise is less, bracket only needs welding, on steel reinforced concrete member without impact, the invention also discloses the newly-increased beam that adopts the corbel type reinforcement means of above-mentioned steel reinforced concrete member to obtain.

Description

A kind of corbel type reinforcement means of steel reinforced concrete member and newly-increased beam
Technical field
The present invention relates to a kind of reinforcement means of steel reinforced concrete member, be specifically related to a kind of corbel type reinforcement means and newly-increased beam of steel reinforced concrete member.
Background technology
At present in civil buildings and industrial building, because the reasons such as the Functional change of building, bearing capacity increase, and need in original building structure, increase beam newly to meet the demands, the current beam that newly increases in original building structure is a kind of simple and effective strengthening reconstruction way.
Original reinforced concrete structure generally increases beam newly by bar planting and reinforces, need on former reinforced concrete structure, hole, and reach certain degree of depth, boring should be with electric hammer or air drill pore-forming, in case of avoided reinforcing bar adjusting hole position, then reinforcing bar is connected by boring bar planting mode with original building structure, then carries out stirrup colligation and build.
Application number is that 201210470138.9 Chinese invention patent application discloses a kind of embedding re-bar technique technique. This processing step is as follows: one, on concrete component, finish bar planting position with chalk or slate pencil; Two, boring: boring is used supporting electric impact drill, and when boring, empty spacing and the hole degree of depth should meet rebar-planting anchorage technique parameter request; Three, clear hole:, first remove hole dust with hair-dryer when in clear the hole,, through repeatedly blowing and brush, in hole, will keep dry, can not be moist, more do not allow water to clean, in order to avoid remain in the effect of the moisture weakening adhesive in hole; Four, fill out reinforcing bar adhesive; Five, bar planting; Six, gel. The present invention can replace the method for processing foundation such as pile tube to realize the satisfied construction requirement to bearing capacity and stability thereof of structure base to the zonule of constructional difficulties, do not need considerable damage existing structure, technique is simple, pull strength is high, construction costs is low, makes partial structurtes consolidation effect can reach design strength requirement.
In the building of a new generation, China has tended to adopt steel reinforced concrete member, and the advantage that has other structures not possess, is widely used in all kinds of buildings. The bearing capacity of steel reinforced concrete member is far above the reinforced concrete member of equal profile, ductility ratio reinforced concrete structure obviously improves, anti-seismic performance well therefore increasing novel building use Steel Reinforced Concrete Members, existing steel reinforced concrete member generally comprises shaped steel, reinforcing bar, stirrup and concrete.
For the newly-increased beam that reinforces the connection in steel reinforced concrete member, adopt traditional boring embedding re-bar technique in steel reinforced concrete member, to hole, boring cannot be avoided part flange plate and the web of inner shaped steel, requires to penetrate this two-layered steel plates for meeting hole depth. Difficulty of construction is large and original structure is impacted.
Summary of the invention
For solving the problems of the technologies described above, goal of the invention of the present invention is to provide a kind of corbel type reinforcement means of steel reinforced concrete member, high, easy to operate, the easy to control the quality system of this corbel type reinforcement means security performance, reduction of erection time.
For achieving the above object, the invention provides following technical scheme: a kind of corbel type reinforcement means of steel reinforced concrete member, described steel reinforced concrete member comprises the first shaped steel, the first reinforcing bar, the first stirrup and the first concrete, described the first shaped steel is positioned at centre, described the first reinforcing bar be arranged at the outside of described the first shaped steel and with the equidirectional extension of described the first shaped steel, described the first stirrup around colligation in the outside of described the first reinforcing bar, described the first concreting is in described the first shaped steel, on the first reinforcing bar and the first stirrup, described corbel type reinforcement means comprises the steps:
First step, determines the reinforcing position of described steel reinforced concrete member;
Second step, cut the first concrete concrete layer in the outside of described reinforcing position, expose the first stirrup section, the first lengths of rebar of the first reinforcing bar and the first shaped steel section flange plate lateral surface of the first shaped steel of the first stirrup of the inner side of described reinforcing position;
Third step, cuts off described the first stirrup section and the first lengths of rebar exposed, makes the open gap of the first stirrup section and the open gap of the first lengths of rebar form the weld pass of leading to described the first shaped steel section flange plate lateral surface;
The 4th step, choose corbel type the second shaped steel that cross section and described weld pass match, described the second shaped steel is inserted to described weld pass, end face and the described first shaped steel section flange plate lateral surface of the first end of described the second shaped steel are welded to connect, the lateral surface of the first end of described the second shaped steel is welded to connect with the section of described the first lengths of rebar and the section of the first stirrup section respectively;
The 5th step, on the flange plate lateral surface of described the second shaped steel and/or medial surface, the second reinforcing bar of welding and the equidirectional extension of described the second shaped steel, makes the free end of described the second reinforcing bar stretch out the second end of described the second shaped steel;
The 6th step, at the outer ring of described the second reinforcing bar around colligation the second stirrup;
The 7th step, at the newly-increased beam forms of arranged outside of described the second stirrup, chamber is built in described newly-increased beam forms besieged city;
The 8th step, builds the second concrete to described building in chamber;
The 9th step, after the second concrete setting, removes described newly-increased beam forms, obtains the newly-increased beam reinforcing the connection in steel reinforced concrete member.
Further technical scheme, between the 4th step and the 5th step, be also provided with seam inspection test procedure, after the weld seam between described the second shaped steel and the first shaped steel section flange plate lateral surface, the section of the first lengths of rebar and the section of the first stirrup section is cooling, check the quality of described weld seam, weldquality is qualified can enter next step.
Further technical scheme, in the 4th step, described the second shaped steel respectively and between described the first shaped steel section flange plate lateral surface, the section of the first lengths of rebar and the section of the first stirrup section, adopt the welding of groove penetration.
Further technical scheme, in the 8th step, first concretely cut brushing cement mortar layer on face described first, then on described the second shaped steel, the second reinforcing bar and the second stirrup, build the second concrete, make described the second concrete and the abundant combination of described cement mortar layer.
Further technical scheme, in the 8th step, in casting process, builds the second concrete on one side, the second concrete of tamping on one side.
Further technical scheme, in the 7th step, is reserved with first hole of vibrating in the junction of described the first shaped steel section flange plate lateral surface and the second shaped steel, be reserved with second hole of vibrating at the downside of the lower wings listrium of described the second shaped steel.
The present invention also provides another one technical scheme: a kind of newly-increased beam of steel reinforced concrete member, described steel reinforced concrete member comprises the first shaped steel, the first reinforcing bar, the first stirrup and the first concrete, described the first shaped steel is positioned at centre, described the first reinforcing bar be arranged at the outside of described the first shaped steel and with the equidirectional extension of described the first shaped steel, described the first stirrup around colligation in the outside of described the first reinforcing bar, described the first concreting is on described the first shaped steel, the first reinforcing bar and the first stirrup
Described steel reinforced concrete member is provided with reinforces position, described reinforcing position arranges the first concrete chisel removal section, the first shaped steel section flange plate lateral surface of the first stirrup section of described the first stirrup, the first lengths of rebar of the first reinforcing bar and the first shaped steel is exposed to described the first concrete chisel removal section, described the first lengths of rebar is provided with Cutting clearance A, described the first stirrup section is provided with Cutting clearance B, and described Cutting clearance A and Cutting clearance B form the weld pass of leading to described the first shaped steel section flange plate lateral surface;
Described newly-increased beam comprises corbel type the second shaped steel, the second reinforcing bar, the second stirrup and the second concrete, the cross section of described the second shaped steel and described weld pass matches, the first end of described the second shaped steel is placed in described weld pass, the end face of the first end of described the second shaped steel and described the first shaped steel section flange plate lateral surface are welded to connect, the lateral surface of the first end of described the second shaped steel is welded to connect with the section of described the first lengths of rebar and the section of the first stirrup section respectively, described the second steel bar welding is connected on the flange plate lateral surface of described the second shaped steel and/or medial surface and welds, described the second reinforcing bar and the equidirectional extension of described the second shaped steel and its free end stretch out the second end of described the second shaped steel, described the second stirrup around colligation in the outside of described the second reinforcing bar, described the second concreting is in described the second shaped steel, on the second reinforcing bar and the second stirrup.
Further technical scheme, the height of described the second shaped steel be greater than described newly-increased beam height 70%.
Further technical scheme, described the second shaped steel respectively and between described the first shaped steel section, the first lengths of rebar and the first stirrup section, adopt the welding of groove penetration.
Further technical scheme, is coated with and is brushed with cement mortar layer on described the first concrete chisel removal section, and described the second concrete is combined connection with described cement mortar layer.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1, security performance improves, Second-Type steel corbel is welded on the first shaped steel section flange plate lateral surface of the first shaped steel, be different from traditional bar planting method, this engineering method does not need original building structural deterioration without boring, the upper and lower side of the second shaped steel is welded and combines with concreting with tension compressive reinforcement respectively, form an entirety, the simple and clear moment of flexure of being transmitted by newly-increased beam of reliably both can having born of the second shaped steel power transmission, the stirrup that the second shaped steel can be regarded again as to continuous setting bears Partial Shear;
2, easy to operate, traditional bar planting need to be holed to certain depth, owing to having flange plate and web in former reinforcing bar concrete component, when bar planting, cannot avoid. Drilling operation difficulty is large, and makes to cause due to boring in web the cross section loss of part, and the direct welding of the second shaped steel does not need to destroy original structure, only need cut part the first concrete layer and just can weld when construction;
3, system easy to control the quality, traditional bar planting need be to the quality of anchoring adhesive, requirement is done in the degree of depth and the aperture etc. of bar planting boring, these hidden securities that unmanageable project relationship arrives structure in inside, this law only need to be controlled weldquality well in when construction, carry out crank detection test, qualified next step operation of just can doing of weldquality;
4, the reduction of erection time, traditional bar planting glue needs 72 hours after above curing conservation, to carry out pull-out test, determine that the qualified rear of rebar-planting quality can carry out next process, the second shaped steel welding procedure completes weld seam just can carry out crank detection test after cooling, carries out next process after up-to-standard.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of existing steel reinforced concrete member;
Fig. 2 is that steel reinforced concrete installed position disclosed by the invention cuts after concrete and the connection diagram of newly-increased beam.
Wherein, 1, the first i shaped steel; 11, the flange plate lateral surface of the first shaped steel section; 2, the first reinforcing bar; 21, the first lengths of rebar; 3, the first stirrup; 31, the first stirrup section; 4, the first concrete; 5, the second i shaped steel; 6, the second reinforcing bar; 7, the second stirrup.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described. Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-
Referring to Fig. 1 and Fig. 2, as shown in legend wherein, a kind of corbel type reinforcement means of steel reinforced concrete member, above-mentioned steel reinforced concrete member comprises the first i shaped steel 1, the first reinforcing bar 2, the first stirrup 3 and the first concrete 4, the first i shaped steel 1 is positioned at centre, the first reinforcing bar 2 be arranged at the outside of the first i shaped steel 1 and with the equidirectional extension of the first i shaped steel 1, the first stirrup 3 around colligation in the outside of the first reinforcing bar 2, the first concrete 4 is built in the first i shaped steel 1, on the first reinforcing bar 2 and the first stirrup 3, above-mentioned corbel type reinforcement means comprises the steps:
First step, determines the reinforcing position of above-mentioned steel reinforced concrete member;
Before construction, should conscientiously read design working drawing, by design drawing, cut control line in the newly-increased beam position measuring of steel reinforced concrete member, after having cut, at the surperficial measuring Plate Welding of the first i shaped steel 1 Position Control line.
Second step, cut the concrete layer of first concrete 4 in the outside of above-mentioned reinforcing position, expose the first stirrup section 31, the first lengths of rebar 21 of the first reinforcing bar 2 and the first shaped steel section flange plate lateral surface 11 of the first i shaped steel 1 of the first stirrup 3 of the inner side of above-mentioned reinforcing position;
Cut the outside concrete cover of above-mentioned steel reinforced concrete member, reject the loosening concrete of surrounding.
Third step, cuts off the first stirrup section 31 and the first lengths of rebar 21 exposed, makes the open gap of the first stirrup section 31 and the open gap of the first lengths of rebar 21 form the weld pass of leading to the first shaped steel section flange plate lateral surface 11;
The excision first stirrup section 31 at web position place and first lengths of rebar 21 at flange plate place
The 4th step, choose corbel type the second i shaped steel 5 that cross section and above-mentioned weld pass match, the second i shaped steel 5 is inserted to above-mentioned weld pass, end face and the first shaped steel section flange plate lateral surface 11 of the first end of the second i shaped steel 5 are welded to connect, the flange plate lateral surface of first end and the end face of the first lengths of rebar 21 of the second i shaped steel 5 are welded to connect, the web of first end of the second i shaped steel 5 and the section of the first stirrup section 31 are welded to connect;
The welding job of the second shaped steel 5 should be born by the welder who obtains corresponding qualification and have effective welder qualification; When welding, weld seam should be straight, and weld ripples should be even, without rosin joint, solder skip;
Weld complete, welder answers the slag on trimming surface and the splash of both sides, check weld appearance quality, the flange plate of welding, the web of the second i shaped steel 5 and the welding of the first stirrup section 31 and the second i shaped steel 5 and the welding of the first firm muscle section 21 of the second i shaped steel 5 and the first shaped steel section flange plate lateral surface 11 all adopt the molten weld seam of groove, and flaw detection must meet existing national standard;
Corbel type the second i shaped steel 5 is installed the axis direction and the location, position that specify in strict accordance with drawing, and the vertical missing of web is controlled in minimum zone;
The 5th step, on the flange plate lateral surface of the second i shaped steel 5 and/or medial surface, the second reinforcing bar 6 of welding and the second i shaped steel 5 equidirectional extensions, makes the free end of the second reinforcing bar 6 stretch out the second end of the second i shaped steel 5;
The second reinforcing bar 6 of pressurized, advancing side is welded on respectively on the flange plate up and down of the second i shaped steel 5, according to the requirement of the lap of splice, with electric arc welding;
The 6th step, at the outer ring of the second reinforcing bar 6 around colligation the second stirrup 7;
The 7th step, at the newly-increased beam forms of arranged outside of the second stirrup 7, chamber is built in above-mentioned newly-increased beam forms besieged city;
The 8th step, builds the second concrete (in figure depending on not going out) to above-mentioned building in chamber;
The 9th step, after above-mentioned the second concrete setting, removes above-mentioned newly-increased beam forms, obtains the newly-increased beam reinforcing the connection in steel reinforced concrete member.
The bracket stress performance that above-mentioned the second i shaped steel 5 is made is good, and Path of Force Transfer is clear and definite, obtains reliable delivery by welding the vertical force that this reliable fashion produces the second i shaped steel 5 local compressions.
Reliable in order to ensure the welding of welding in the 4th step, between the 4th step and the 5th step, be also provided with seam inspection test procedure, after the weld seam between the second i shaped steel 5 and the first shaped steel section flange plate lateral surface 11, the first lengths of rebar 21 and the first stirrup section 31 is cooling, check the quality of above-mentioned weld seam, weldquality is qualified can enter next step, and the second i shaped steel 5 respectively and between the first shaped steel section flange plate lateral surface 11, the section of the first lengths of rebar 21 and the section of the first stirrup section 31, adopt groove penetration welding.
In order to ensure the first concrete layer 4 and the second concrete layer slitless connection, first at the brushing cement mortar layer on face that cuts of the first concrete 4, then on the second i shaped steel 5, the second reinforcing bar 6 and the second stirrup 7, build the second concrete, make the second concrete and the abundant combination of above-mentioned cement mortar layer.
In order to ensure the degree of packing of newly-increased beam, in the 8th step, in casting process, build the second concrete on one side, the second concrete of tamping on one side, will ensure its packing and prevent cracking while building.
For easy construction, being difficult for vibrating, place's vibration staying is smash mouth, in the 7th step, be reserved with first hole (in figure depending on not going out) of vibrating in the junction of the first shaped steel section flange plate lateral surface 11 and the second i shaped steel 5, be reserved with second hole (in figure depending on not going out) of vibrating at the downside of the lower wings listrium of the second i shaped steel 5.
Introduce a kind of newly-increased beam of steel reinforced concrete member below, above-mentioned steel reinforced concrete member comprises the first i shaped steel 1, the first reinforcing bar 2, the first stirrup 3 and the first concrete 4, the first i shaped steel 1 is positioned at centre, the first reinforcing bar 2 be arranged at the outside of the first i shaped steel 1 and with the equidirectional extension of the first i shaped steel 1, the first stirrup 3 around colligation in the outside of the first reinforcing bar 2, the first concrete 4 is built on the first i shaped steel 1, the first reinforcing bar 2 and the first stirrup 3
Above-mentioned steel reinforced concrete member is provided with reinforces position, this reinforcing position arranges the first concrete chisel removal section, the first shaped steel section flange plate lateral surface 11 of the first stirrup section 31 of the first stirrup 3, the first lengths of rebar 21 of the first reinforcing bar 2 and the first i shaped steel 1 is exposed to above-mentioned the first concrete chisel removal section, the first lengths of rebar 21 is provided with Cutting clearance A, the first stirrup section 31 is provided with Cutting clearance B, and above-mentioned Cutting clearance A and Cutting clearance B form the weld pass of leading to the first shaped steel section flange plate lateral surface 11;
Above-mentioned newly-increased beam comprises corbel type the second i shaped steel 5, the second reinforcing bar 6, the second stirrup 7 and the second concrete, the second i shaped steel 5 matches with the cross section of above-mentioned weld pass, the first end of the second i shaped steel 5 is placed in above-mentioned weld pass, the end face of the first end of the second i shaped steel 5 and the first shaped steel section flange plate lateral surface 11 are welded to connect, the flange plate lateral surface of the first end of the second i shaped steel 5 and the section of the first lengths of rebar 21 are welded to connect, the section of the web of the first end of the second i shaped steel 5 and the first stirrup section 31 is welded to connect, the second reinforcing bar 6 is welded on the flange plate lateral surface and/or medial surface of the second i shaped steel 5, the second reinforcing bar 6 and the equidirectional extension of the second i shaped steel 5 and its free end stretch out the second end of the second i shaped steel 5, the second stirrup 7 around colligation in the outside of the second reinforcing bar 6, the second concreting is in the second i shaped steel 5, on the second reinforcing bar 6 and the second stirrup 7.
The height of the second i shaped steel 5 be greater than above-mentioned newly-increased beam height 70%.
Be below traditional embedding re-bar technique and the contrast of newly-increased beam reinforcement means of the present invention and structure
Contrast project Steel reinforced concrete member increases beam bar planting reinforcement technique newly Steel reinforced concrete member increases beam bracket reinforcement technique newly
Economic benefit The bar planting of holing on steel column, need penetrate steel plate, expends more artificial This method construction, saves artificial and duration
Environmental protection, energy-saving benefit Embedding re-bar technique need to be on original structure bore operation, airborne dust, noise are larger. Only need cut bracket position protective layer. Cut operation less, airborne dust, noise are less
Social benefit Boring need cause cross section loss to steel column web Bracket only need weld former steel column without impact
Embodiment bis-
All the other are identical with described embodiment mono-, and difference is, above-mentioned the first i shaped steel replaces with a H shaped steel, and above-mentioned the second i shaped steel replaces with the 2nd H shaped steel.
Be more than the description to the embodiment of the present invention, by the above-mentioned explanation to the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention. To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments. Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. the corbel type reinforcement means of a steel reinforced concrete member, described steel reinforced concrete member comprises the first shaped steel, the first reinforcing bar, the first stirrup and the first concrete, described the first shaped steel is positioned at centre, described the first reinforcing bar be arranged at the outside of described the first shaped steel and with the equidirectional extension of described the first shaped steel, described the first stirrup around colligation in the outside of described the first reinforcing bar, described the first concreting is on described the first shaped steel, the first reinforcing bar and the first stirrup, it is characterized in that, described corbel type reinforcement means comprises the steps:
First step, determines the reinforcing position of described steel reinforced concrete member;
Second step, cut the first concrete concrete layer in the outside of described reinforcing position, expose the first stirrup section, the first lengths of rebar of the first reinforcing bar and the first shaped steel section flange plate lateral surface of the first shaped steel of the first stirrup of the inner side of described reinforcing position;
Third step, cuts off described the first stirrup section and the first lengths of rebar exposed, makes the open gap of the first stirrup section and the open gap of the first lengths of rebar form the weld pass of leading to described the first shaped steel section flange plate lateral surface;
The 4th step, choose corbel type the second shaped steel that cross section and described weld pass match, described the second shaped steel is inserted to described weld pass, end face and the described first shaped steel section flange plate lateral surface of the first end of described the second shaped steel are welded to connect, the lateral surface of the first end of described the second shaped steel is welded to connect with the section of described the first lengths of rebar and the section of the first stirrup section respectively;
The 5th step, on the flange plate lateral surface of described the second shaped steel and/or medial surface, the second reinforcing bar of welding and the equidirectional extension of described the second shaped steel, makes the free end of described the second reinforcing bar stretch out the second end of described the second shaped steel;
The 6th step, at the outer ring of described the second reinforcing bar around colligation the second stirrup;
The 7th step, at the newly-increased beam forms of arranged outside of described the second stirrup, chamber is built in described newly-increased beam forms besieged city;
The 8th step, builds the second concrete to described building in chamber;
The 9th step, after the second concrete setting, removes described newly-increased beam forms, obtains the newly-increased beam reinforcing the connection in steel reinforced concrete member.
2. corbel type reinforcement means according to claim 1, it is characterized in that, between the 4th step and the 5th step, be also provided with seam inspection test procedure, after the weld seam between described the second shaped steel and the first shaped steel section flange plate lateral surface, the section of the first lengths of rebar and the section of the first stirrup section is cooling, check the quality of described weld seam, weldquality is qualified can enter next step.
3. corbel type reinforcement means according to claim 1, it is characterized in that, in the 4th step, described the second shaped steel respectively and between described the first shaped steel section flange plate lateral surface, the section of the first lengths of rebar and the section of the first stirrup section, adopt groove penetration welding.
4. corbel type reinforcement means according to claim 1, it is characterized in that, in the 8th step, first concretely cut brushing cement mortar layer on face described first, then on described the second shaped steel, the second reinforcing bar and the second stirrup, build the second concrete, make described the second concrete and the abundant combination of described cement mortar layer.
5. corbel type reinforcement means according to claim 1, is characterized in that, in the 8th step, in casting process, builds the second concrete on one side, the second concrete of tamping on one side.
6. corbel type reinforcement means according to claim 5, it is characterized in that, in the 7th step, be reserved with first hole of vibrating in the junction of described the first shaped steel section flange plate lateral surface and the second shaped steel, be reserved with second hole of vibrating at the downside of the lower wings listrium of described the second shaped steel.
7. the newly-increased beam of a steel reinforced concrete member, described steel reinforced concrete member comprises the first shaped steel, the first reinforcing bar, the first stirrup and the first concrete, described the first shaped steel is positioned at centre, described the first reinforcing bar be arranged at the outside of described the first shaped steel and with the equidirectional extension of described the first shaped steel, described the first stirrup around colligation in the outside of described the first reinforcing bar, described the first concreting, on described the first shaped steel, the first reinforcing bar and the first stirrup, is characterized in that:
Described steel reinforced concrete member is provided with reinforces position, described reinforcing position arranges the first concrete chisel removal section, the first shaped steel section flange plate lateral surface of the first stirrup section of described the first stirrup, the first lengths of rebar of the first reinforcing bar and the first shaped steel is exposed to described the first concrete chisel removal section, described the first lengths of rebar is provided with Cutting clearance A, described the first stirrup section is provided with Cutting clearance B, and described Cutting clearance A and Cutting clearance B form the weld pass of leading to described the first shaped steel section flange plate lateral surface;
Described newly-increased beam comprises corbel type the second shaped steel, the second reinforcing bar, the second stirrup and the second concrete, the cross section of described the second shaped steel and described weld pass matches, the first end of described the second shaped steel is placed in described weld pass, the end face of the first end of described the second shaped steel and described the first shaped steel section flange plate lateral surface are welded to connect, the lateral surface of the first end of described the second shaped steel is welded to connect with the section of described the first lengths of rebar and the section of the first stirrup section respectively, described the second steel bar welding is connected on the flange plate lateral surface of described the second shaped steel and/or medial surface and welds, described the second reinforcing bar and the equidirectional extension of described the second shaped steel and its free end stretch out the second end of described the second shaped steel, described the second stirrup around colligation in the outside of described the second reinforcing bar, described the second concreting is in described the second shaped steel, on the second reinforcing bar and the second stirrup.
8. newly-increased beam according to claim 7, is characterized in that, the height of described the second shaped steel be greater than described newly-increased beam height 70%.
9. newly-increased beam according to claim 7, is characterized in that, described the second shaped steel respectively and between described the first shaped steel section, the first lengths of rebar and the first stirrup section, adopt groove penetration welding.
10. newly-increased beam according to claim 7, is characterized in that, on described the first concrete chisel removal section, is coated with and is brushed with cement mortar layer, and described the second concrete is combined connection with described cement mortar layer.
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