CN103967289B - A kind ofly be applicable to the bar planting method and the bar planting structure that improve anchoring bearing capacity after plain concrete - Google Patents
A kind ofly be applicable to the bar planting method and the bar planting structure that improve anchoring bearing capacity after plain concrete Download PDFInfo
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- CN103967289B CN103967289B CN201410164610.5A CN201410164610A CN103967289B CN 103967289 B CN103967289 B CN 103967289B CN 201410164610 A CN201410164610 A CN 201410164610A CN 103967289 B CN103967289 B CN 103967289B
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Abstract
The invention discloses a kind of the bar planting method and the bar planting structure that improve anchoring bearing capacity after plain concrete.After the present invention forms many muscle by the stirrup that described minor diameter reinforcing bar and minor diameter reinforcing steel bars exposed part are arranged, anchor system and described young concrete and described primary load bearing reinforcing bar form main muscle actuating system, solve in strengthening and rebuilding engineering project and cause rear anchoring bearing capacity cannot meet the problem of code requirement because plain concrete substrate intensity is not enough or size is less.Meanwhile, the rebar fastening system that minor diameter reinforcing bar is formed can retrain the actuating system of cast-in-situ concrete embedded bar, and the generation bocca avoiding it too early extracts destruction, improves the supporting capacity of bar planting system.
Description
Technical field
The present invention relates to building field, particularly a kind of bar planting method that anchoring bearing capacity after plain concrete is provided.
Background technology
Chemically-planted steel bar is widely used in because of the advantage of its uniqueness and stable transmission force property in the strengthening and reformings such as industry and civilian construction, road and bridge, hydroelectric project and ocean engineering.In recent years, more and more build renovation owing to running in construction work, the needs of the change of building occupancy or the reorganization and expansion of existing building and a large amount of new construction construction, the application of chemically-planted steel bar is also more and more extensive.
The common practice of chemically-planted steel bar is concrete substrate boring (aperture is for implanting bar diameter+4 ~ 8mm), injects anchoring adhesive, then by reinforcing bar implant holes, can realize power transmission after anchoring adhesive solidification behind clear hole.Concrete substrate intensity is to chemically-planted steel bar performance important, domestic and international relevant specification is made stipulations to concrete strength: in China " concrete structure reinforcement design specifications " (GB50367-2006), regulation adopts embedding re-bar technique, when original structure is cantilevered structure, its strength grade of concrete must not lower than C25, for concrete strength during other structural element must not lower than C20; In U.S. ACI355.2, regulation adopts chemical anchor bolts technology, and the minimum compressive strength of concrete substrate is 17MPa.But, large volume low-intensity (concrete strength is lower than C20) concrete foundation can be run into carry out that equipment replacement, equipment are newly-increased, concrete foundation reinforcement in Practical Project, according to chemically-planted steel bar technology then concrete strength cannot meet the requirement of current specifications.In addition, when " concrete structure post-anchoring technology code " (JGJ145-2004) defines chemically-planted steel bar for antidetonation anchor connection, the minimum anchorage depth of primary structural member on C20 concrete substrate must not lower than 26d, and this often cannot meet when practical operation for the less component of some base material thickness.Meanwhile, due to the insufficient strength of plain concrete, bar planting generation bocca can be caused to extract destruction.Therefore, lack in chemically-planted steel bar construction a kind of plain concrete is provided after the bar planting method of anchoring bearing capacity.
Summary of the invention
The object of the invention is to solve in strengthening and rebuilding engineering project causes rear anchoring bearing capacity cannot meet the problem of code requirement because plain concrete substrate intensity is not enough or size is less, there is provided one to get the multiple technologies such as core, rear-anchorage inserted bar and reinforcing bar be pre-buried in conjunction with concrete, be applicable to improve the bar planting method of anchoring bearing capacity after plain concrete.
Technical scheme of the present invention is as follows:
Improve a bar planting method for anchoring bearing capacity after plain concrete, comprise the following steps:
(1) according to size and the intensity of design load requirement, plain concrete base material, determine to get core size, minor diameter bar diameter and the minor diameter reinforcing steel implant duct degree of depth, stirrup specification, primary load bearing bar gauge, young concrete intensity;
(2) on plain concrete base material, get core, the shape of core bore is cylindrical;
(3) vertical drilling hole bottom described core bore, form minor diameter reinforcing steel implant duct, described minor diameter reinforcing steel implant duct is multiple;
(4) in described minor diameter reinforcing steel implant duct, minor diameter reinforcing bar chemically-planted steel bar is carried out;
(5) after the anchoring adhesive solidification of described minor diameter reinforcing bar, stirrup is carried out to described minor diameter reinforcing steel bars exposed part;
(6) primary load bearing reinforcing bar is fixed in described core bore, with young concrete described core bore is built and described core bore is filled up, maintenance is carried out to young concrete until bar planting structure meets requirement for bearing capacity.
Preferably, described in step (3), minor diameter reinforcing steel implant duct is evenly distributed on bottom described core bore around the center of circle, and described minor diameter reinforcing steel implant duct is equal apart from the distance in the center of circle bottom described core bore.
Preferably, described in step (3), the quantity in minor diameter reinforcing steel implant duct is 3 ~ 12.
Preferably, described in step (6), primary load bearing reinforcing bar is fixed on the axis of described cylindrical core bore.
Improve a bar planting structure for anchoring bearing capacity after plain concrete, comprise core bore, minor diameter reinforcing bar, stirrup and the primary load bearing reinforcing bar offered on described plain concrete in claim 1; Multiple vertical minor diameter reinforcing steel implant duct is provided with in the bottom of described core bore; The lower end of described minor diameter reinforcing bar is arranged in described minor diameter reinforcing steel implant duct, and upper end is positioned at described core bore; Described minor diameter reinforcing steel implant duct is evenly distributed on circumferentially same; The lower end of described primary load bearing reinforcing bar is vertically arranged on the center of described circumference; The upper end of described minor diameter reinforcing bar is fixed by described stirrup; Young concrete has been filled in described core bore.
Preferably, the quantity in described minor diameter reinforcing steel implant duct is 3 ~ 12.
Preferably, described primary load bearing reinforcement installation is on the axis of described cylindrical core bore.
Improve a bar planting structure for anchoring bearing capacity after plain concrete, comprise core bore, minor diameter reinforcing bar, stirrup and the primary load bearing reinforcing bar offered on described plain concrete in claim 1; Multiple vertical minor diameter reinforcing steel implant duct is provided with in the bottom of described core bore; The lower end of described minor diameter reinforcing bar is arranged in described minor diameter reinforcing bar duct, and upper end is positioned at described core bore; Described minor diameter reinforcing bar has many, is evenly distributed on circumferentially same; The upper end of described minor diameter reinforcing bar is fixed by described stirrup; The lower end of described primary load bearing reinforcing bar is vertically arranged on the center of described circumference; Young concrete has been filled in described core bore.
Preferably, the quantity in described minor diameter reinforcing steel implant duct is 3 ~ 12.
Preferably, described primary load bearing reinforcement installation is on the axis of described cylindrical core bore.
The force-mechanism of bar planting structure provided by the present invention is:
The stirrup that the described minor diameter reinforcing bar of plant anchor on plain concrete base material and minor diameter reinforcing steel bars exposed part are arranged forms anchor system after many muscle; Described young concrete and described primary load bearing reinforcing bar form main muscle actuating system.Structural load is passed to bar planting structure place provided by the present invention by primary load bearing reinforcing bar, jointly bears structural load by anchor system after many muscle that minor diameter reinforcing bar is formed with by the pre-buried main muscle actuating system formed of primary load bearing reinforcing bar.Meanwhile, can be retrained by the pre-buried main muscle actuating system formed of primary load bearing reinforcing bar by anchor system after many muscle that minor diameter reinforcing bar is formed, the generation bocca avoiding it too early extracts destruction, thus improves the integrated carrying ability of bar planting system.
Technique effect of the present invention is by anchor system after many muscle and main muscle actuating system, and after improving plain concrete, the bearing capacity of structural load is born in anchoring, meets the Seismic Bearing Capacity of specification, avoids bar planting generation bocca to extract destruction.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of bar planting structure of the present invention.
Fig. 2 is the sectional view of bar planting structure of the present invention.
Wherein, 1 is plain concrete base material, and 2 for getting core region, and 3 is young concrete, and 4 is stirrup, and 5 is minor diameter reinforcing bar, and 6 is minor diameter reinforcing steel implant duct, and 7 is primary load bearing reinforcing bar.
Detailed description of the invention
Below in conjunction with Fig. 1, Fig. 2 and embodiment, the present invention is described in more detail:
Embodiment 1
Composition graphs 1, Fig. 2, be a kind ofly applicable to improve the bar planting structure of anchoring bearing capacity and the step of implementation method after plain concrete and be:
(1) according to size and the intensity of design load requirement, plain concrete base material, determine to get core size, minor diameter bar diameter and the minor diameter reinforcing steel implant duct degree of depth, stirrup specification, primary load bearing bar gauge, young concrete intensity;
(2) require according to design load, the size of plain concrete base material and intensity are determined gets core size, core got by plain concrete base material, and get core and complete with getting core bucket, leave core bore after getting core on plain concrete, the shape of described core bore is cylindrical;
((3) are vertical drilling hole bottom described core bore, and form minor diameter reinforcing steel implant duct, described minor diameter reinforcing steel implant duct is multiple; The quantity in preferred described minor diameter reinforcing steel implant duct is 3 ~ 12; Described minor diameter reinforcing steel implant duct is preferably evenly distributed on bottom described core bore around the center of circle, and described minor diameter reinforcing steel implant duct is equal apart from the distance in the center of circle bottom described core bore;
(4) in described minor diameter reinforcing steel implant duct, carry out minor diameter reinforcing steel implant, bar planting can take chemically-planted steel bar, is fixed in described minor diameter reinforcing steel implant duct with anchoring adhesive by described minor diameter reinforcing bar;
(5) after the anchoring adhesive solidification of described minor diameter reinforcing bar, stirrup is carried out to described minor diameter reinforcing steel bars exposed part;
(6) primary load bearing reinforcing bar is fixed in described core bore, described primary load bearing reinforcing bar is preferably fixed on the axis of described cylindrical core bore, with young concrete described core bore built and described core bore is filled up, maintenance being carried out to young concrete until bar planting structure meets requirement for bearing capacity.
Embodiment 2
Composition graphs 1, Fig. 2, a kind of bar planting structure improving anchoring bearing capacity after plain concrete, comprises core bore, minor diameter reinforcing bar, stirrup and the primary load bearing reinforcing bar offered on described plain concrete in claim 1; Carry out vertical drilling hole in the bottom of described core bore, construct multiple vertical minor diameter reinforcing steel implant duct, described minor diameter reinforcing steel implant duct is slightly larger than minor diameter reinforcing bar, and the quantity in preferred described minor diameter reinforcing steel implant duct is 3 ~ 12; The lower end of described minor diameter reinforcing bar is arranged in described minor diameter reinforcing bar duct by bar planting, and upper end is positioned at described core bore; Described minor diameter reinforcing steel implant duct is evenly distributed on circumferentially same; The lower end of described primary load bearing reinforcing bar is vertically arranged on the center of described circumference, and preferred described primary load bearing reinforcement installation is on the axis of described cylindrical core bore; The upper end of described minor diameter reinforcing bar is fixed by described stirrup; In described core bore, fill young concrete, minor diameter reinforcing bar and primary load bearing bar pouring have been built up one.
Claims (7)
1. improve a bar planting method for anchoring bearing capacity after plain concrete, it is characterized in that, comprise the following steps:
(1) according to size and the intensity of design load requirement, plain concrete base material, determine to get core size, minor diameter bar diameter and the minor diameter reinforcing steel implant duct degree of depth, stirrup specification, primary load bearing bar gauge, young concrete intensity;
(2) on plain concrete base material, get core, the shape of core bore is cylindrical;
(3) vertical drilling hole bottom described core bore, form minor diameter reinforcing steel implant duct, described minor diameter reinforcing steel implant duct is multiple;
(4) in described minor diameter reinforcing steel implant duct, minor diameter reinforcing bar chemically-planted steel bar is carried out;
(5) after the anchoring adhesive solidification of described minor diameter reinforcing bar, stirrup operation is carried out to described minor diameter reinforcing steel bars exposed part;
(6) primary load bearing reinforcing bar is fixed in described core bore, with young concrete described core bore is built and described core bore is filled up, maintenance is carried out to young concrete until bar planting structure meets requirement for bearing capacity.
2. the bar planting method of anchoring bearing capacity after raising plain concrete according to claim 1, it is characterized in that, described in step (3), minor diameter reinforcing steel implant duct is evenly distributed on bottom described core bore around the center of circle, and described minor diameter reinforcing steel implant duct is equal apart from the distance in the center of circle bottom described core bore.
3. the bar planting method of anchoring bearing capacity after raising plain concrete according to claim 2, it is characterized in that, described in step (3), the quantity in minor diameter reinforcing steel implant duct is 3 ~ 12.
4. the bar planting method of anchoring bearing capacity after raising plain concrete according to claim 1, it is characterized in that, described in step (6), primary load bearing reinforcing bar is fixed on the axis of described cylindrical core bore.
5. after a raising plain concrete according to claim 1, the bar planting method of anchoring bearing capacity improves the bar planting structure of anchoring bearing capacity after plain concrete, it is characterized in that, be included in core bore, minor diameter reinforcing bar, stirrup and primary load bearing reinforcing bar that described plain concrete is offered; Multiple vertical minor diameter reinforcing steel implant duct is provided with in the bottom of described core bore; The lower end of described minor diameter reinforcing bar is arranged in described minor diameter reinforcing steel implant duct, and upper end is positioned at described core bore; Described minor diameter reinforcing steel implant duct is evenly distributed on circumferentially same; The upper end of described minor diameter reinforcing bar is fixed by described stirrup; The lower end of described primary load bearing reinforcing bar is vertically arranged on the center of described circumference; Young concrete has been filled in described core bore.
6. the bar planting structure of anchoring bearing capacity after raising plain concrete according to claim 5, it is characterized in that, the quantity in described minor diameter reinforcing steel implant duct is 3 ~ 12.
7. the bar planting structure of anchoring bearing capacity after raising plain concrete according to claim 5, it is characterized in that, described primary load bearing reinforcement installation is on the axis of described cylindrical core bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410164610.5A CN103967289B (en) | 2014-04-23 | 2014-04-23 | A kind ofly be applicable to the bar planting method and the bar planting structure that improve anchoring bearing capacity after plain concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410164610.5A CN103967289B (en) | 2014-04-23 | 2014-04-23 | A kind ofly be applicable to the bar planting method and the bar planting structure that improve anchoring bearing capacity after plain concrete |
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| Publication Number | Publication Date |
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| CN103967289A CN103967289A (en) | 2014-08-06 |
| CN103967289B true CN103967289B (en) | 2016-01-13 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507498B (en) * | 2015-12-01 | 2017-11-28 | 中国航空规划设计研究总院有限公司 | A kind of rear anchoring process of tension steel construction |
| CN106759440B (en) * | 2016-12-27 | 2019-07-09 | 中国铁塔股份有限公司盐城市分公司 | Foundation of iron tower screw bolt reinforcing method |
| CN108170978B (en) * | 2018-01-12 | 2021-09-14 | 上海城乡建筑设计院有限公司 | Method for analyzing tensile bearing capacity of embedded hoisting anchor bolt of precast concrete member |
| CN109184221A (en) * | 2018-08-27 | 2019-01-11 | 中国水利水电第十四工程局有限公司 | Anchor rib construction method is planted after a kind of concrete |
| CN109610646B (en) * | 2018-12-19 | 2020-10-23 | 广东工业大学 | New and old concrete connection structure |
| CN110306830A (en) * | 2019-07-22 | 2019-10-08 | 江苏苏南建筑安装工程有限公司 | A kind of implantation bar construction and pore reinforced construction method |
| CN111794292A (en) * | 2019-10-28 | 2020-10-20 | 呼和浩特市四方工程质量检测试验中心 | Plain concrete pile static test anchor pile counter-force technology based on post-planting bars |
| CN112523536A (en) * | 2020-11-19 | 2021-03-19 | 浙江二十冶建设有限公司 | Method for rebuilding and planting reinforcement for existing building |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999057390A2 (en) * | 1998-05-07 | 1999-11-11 | Man Yop Han | Anchoring method and apparatus in a prestress reinforcement |
| CN102767142A (en) * | 2012-08-09 | 2012-11-07 | 四川川交路桥有限责任公司 | Bar planting construction method for widening and reinforcing reinforced concrete |
| CN103306219A (en) * | 2013-06-25 | 2013-09-18 | 福州大学 | Method for quickly repairing and reinforcing post-earthquake damaged pier |
| CN103448142A (en) * | 2013-08-29 | 2013-12-18 | 俞晓东 | Supporting pile tensioning device |
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2014
- 2014-04-23 CN CN201410164610.5A patent/CN103967289B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999057390A2 (en) * | 1998-05-07 | 1999-11-11 | Man Yop Han | Anchoring method and apparatus in a prestress reinforcement |
| CN102767142A (en) * | 2012-08-09 | 2012-11-07 | 四川川交路桥有限责任公司 | Bar planting construction method for widening and reinforcing reinforced concrete |
| CN103306219A (en) * | 2013-06-25 | 2013-09-18 | 福州大学 | Method for quickly repairing and reinforcing post-earthquake damaged pier |
| CN103448142A (en) * | 2013-08-29 | 2013-12-18 | 俞晓东 | Supporting pile tensioning device |
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