CN102953346A - Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap - Google Patents
Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap Download PDFInfo
- Publication number
- CN102953346A CN102953346A CN201210499928XA CN201210499928A CN102953346A CN 102953346 A CN102953346 A CN 102953346A CN 201210499928X A CN201210499928X A CN 201210499928XA CN 201210499928 A CN201210499928 A CN 201210499928A CN 102953346 A CN102953346 A CN 102953346A
- Authority
- CN
- China
- Prior art keywords
- jack
- cantilever
- root
- cantilever pier
- pier
- 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.)
- Granted
Links
- 230000002787 reinforcement Effects 0.000 title claims abstract description 11
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 14
- 238000005336 cracking Methods 0.000 claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000005452 bending Methods 0.000 abstract description 9
- 230000000717 retained effect Effects 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
本发明公开一种桥梁悬臂墩的根部竖向开裂的加固装置，加固装置包括钢筋混凝土支撑体和千斤顶，千斤顶位于钢筋混凝土支撑体顶面与悬臂墩的支座正下方，所述千斤顶被埋设在混凝土内。采用这种加固装置，大大减少了悬臂墩根部的负弯矩和剪力；千斤顶本身的顶升力可控，通过调节千斤顶与悬臂墩的顶升力，有效的将悬臂墩的载荷传递给钢筋混凝土支撑体，从而有效的减少了悬臂墩根部的负弯矩及剪力，保障了车辆的安全通行；千斤顶不仅被相应持力状态下永久保留在混凝土中，还减少了外部环境的侵蚀，延长了千斤顶的使用寿命。
The invention discloses a reinforcement device for vertical cracking at the root of a bridge cantilever pier. The reinforcement device includes a reinforced concrete support body and a jack. The jack is located directly below the top surface of the reinforced concrete support body and the support of the cantilever pier. The jack is buried inside the concrete. The use of this reinforcement device greatly reduces the negative bending moment and shear force at the root of the cantilever pier; the jacking force of the jack itself is controllable, and the load of the cantilever pier is effectively transferred to the reinforced concrete support by adjusting the jacking force of the jack and the cantilever pier body, thereby effectively reducing the negative bending moment and shear force at the root of the cantilever pier, and ensuring the safe passage of vehicles; the jack is not only permanently retained in the concrete under the corresponding holding force, but also reduces the erosion of the external environment and extends the length of the jack service life.
Description
技术领域technical field
本发明涉及桥梁悬臂墩的加固装置，具体涉及一种桥梁悬臂墩帽的根部竖向开裂的加固装置。The invention relates to a reinforcing device for a bridge cantilever pier, in particular to a reinforcing device for vertical cracking at the root of a bridge cantilever pier cap.
背景技术Background technique
大跨径桥梁有时为了减少下部结构工程数量，减轻桥墩重量采用悬臂式桥墩，支座布置往往都靠近悬臂端部，悬臂部分按悬臂梁设计配置有相当数量的预应力钢束及普通钢筋，但如果配筋或结构尺寸不足，悬臂墩根部过大的负弯矩会引起根部附近产生由上而下的竖向裂缝，随着时间的延续，裂缝会不断往下延伸并扩展，严重影响大桥的安全。常用的加固手段是在悬臂墩纵向两侧的上半部分增设预应力的钢索，补加预压应力抵抗负弯矩产生的拉应力。但由于悬臂墩尺寸的限制，新增预应力索的布置位置有限，当桥跨不大时，所产生悬臂墩根部的负弯矩及剪力也不太大，依靠新增的有限的预应力索能克服。如果桥跨较大，所产生悬臂墩根部负弯矩及剪力也很大，仅靠新增的预应力索施加预应力难以承受过大的内力，因此就需要采用其他更加有效的手段来减少悬臂根部的内力。Long-span bridges sometimes use cantilever piers in order to reduce the number of substructure works and reduce the weight of the pier. The bearings are often arranged close to the end of the cantilever. If the reinforcement or structure size is insufficient, the excessive negative bending moment at the root of the cantilever pier will cause vertical cracks from top to bottom near the root. As time goes on, the cracks will continue to extend and expand downwards, seriously affecting the bridge. Safety. The commonly used reinforcement method is to add prestressed steel cables to the upper half of the longitudinal sides of the cantilever pier, and add prestressed stress to resist the tensile stress generated by negative bending moment. However, due to the limitation of the size of the cantilever pier, the location of the new prestressed cables is limited. When the bridge span is not large, the negative bending moment and shear force at the root of the cantilever pier are not too large. Can overcome. If the bridge span is large, the negative bending moment and shear force at the root of the cantilever pier will be very large, and it is difficult to bear the excessive internal force only by prestressing the newly added prestressed cable. Therefore, other more effective means are needed to reduce the cantilever. internal strength of the roots.
发明内容Contents of the invention
本发明的目的在于克服现有技术的缺点和不足，提供一种结构简单、承受内力大的桥梁悬臂墩帽的根部竖向开裂的加固装置，减少悬臂根部的负弯矩和剪力。The purpose of the present invention is to overcome the disadvantages and deficiencies of the prior art, to provide a reinforcement device for vertical cracking at the root of the bridge cantilever pier cap with simple structure and large internal force, and to reduce the negative bending moment and shear force at the cantilever root.
本发明通过下述技术方案实现：The present invention realizes through following technical scheme:
一种桥梁悬臂墩帽的根部竖向开裂的加固装置，所述加固装置包括钢筋混凝土支撑体和千斤顶，所述千斤顶置于钢筋混凝土支撑体顶面与悬臂墩帽的支座正下方。所述千斤顶埋设在支撑体顶面的混凝土中。A reinforcing device for vertical cracking at the root of a bridge cantilever pier cap, the reinforcing device includes a reinforced concrete support body and a jack, and the jack is placed directly under the top surface of the reinforced concrete support body and the support of the cantilever pier cap. The jack is buried in the concrete on the top surface of the supporting body.
本发明与现有的技术相比具有以下优点：为防止桥梁悬臂墩的悬臂根部竖向开裂继续扩大，本专利加固装置采用了钢筋混凝土支撑体和千斤顶，千斤顶置于钢筋混凝土支撑体顶面与悬臂墩的支座正下方，先使千斤顶顶升持荷至悬臂部分的竖向裂缝大体闭合，保持千斤顶的持力状态并锁定，最终用混凝土将千斤顶埋设于支撑体顶部。采用这种加固装置，大大减少了悬臂墩根部的负弯矩和剪力。千斤顶本身的顶升力可控，通过调节千斤顶与悬臂墩的顶升力，有效的将悬臂部分的载荷传递给钢筋混凝土支撑体，从而有效地减少了悬臂墩悬臂根部的负弯矩及剪力，保障了车辆的安全通行。Compared with the existing technology, the present invention has the following advantages: in order to prevent the vertical cracking of the cantilever root of the bridge cantilever pier from continuing to expand, the patented reinforcement device adopts a reinforced concrete support body and a jack, and the jack is placed on the top surface of the reinforced concrete support body. Just below the support of the cantilever pier, the vertical cracks in the cantilever part are lifted by the jack to roughly close the load, and the holding state of the jack is kept and locked. Finally, the jack is buried on the top of the support body with concrete. With this reinforcement device, the negative bending moment and shear force at the root of the cantilever pier are greatly reduced. The jacking force of the jack itself is controllable. By adjusting the jacking force of the jack and the cantilever pier, the load of the cantilever part can be effectively transferred to the reinforced concrete support body, thereby effectively reducing the negative bending moment and shear force at the cantilever root of the cantilever pier, ensuring safe passage of vehicles.
附图说明Description of drawings
图1是本发明桥梁悬臂墩帽的根部竖向开裂的加固装置结构示意图。Fig. 1 is a structural schematic diagram of a reinforcement device for vertical cracking at the root of a bridge cantilever pier cap according to the present invention.
具体实施方式Detailed ways
下面结合具体实施例对本发明作进一步具体详细描述。The present invention will be described in further detail below in conjunction with specific embodiments.
实施例Example
如图1所示，本发明桥梁悬臂墩帽的根部竖向开裂的加固装置，该加固装置包括钢筋混凝土支撑体5和千斤顶4，所述千斤顶4置于钢筋混凝土支撑体5顶面与悬臂墩帽3的支座2正下方。As shown in Figure 1, the reinforcing device of the vertical cracking of the root of bridge cantilever pier cap of the present invention, this reinforcing device comprises reinforced concrete support body 5 and jack 4, and described jack 4 places reinforced concrete support body 5 top surfaces and cantilever pier The holder 2 of the cap 3 is directly below.
钢筋混凝土支撑体5可根据墩身6的构造和现场情况，设置在墩身6横向两侧，为施工方便钢筋混凝土支撑体5可采用三角形的型钢骨架做预支承，以此为基础再绑扎钢筋、立模板、浇筑混凝土。The reinforced concrete support body 5 can be arranged on the lateral sides of the pier body 6 according to the structure of the pier body 6 and the site conditions. For the convenience of construction, the reinforced concrete support body 5 can be pre-supported by a triangular shaped steel skeleton, and then the steel bars are bound on this basis. , formwork, pouring concrete.
千斤顶4埋设在支撑体顶面的混凝土中。千斤顶4的顶升吨位要符合设计要求，调节千斤顶的顶升行程时，要结合施工现场中该桥梁悬臂墩的悬臂根部竖向开裂程度，以及裂缝1闭合程度进行顶升。千斤顶4的顶升行程（或者顶升力度）符合要求后，固定千斤顶的顶升行程；采用高强度微膨胀混凝土封填千斤顶4的四周，使千斤顶4在相应持力状态下永久保留在混凝土中。The jack 4 is embedded in the concrete on the top surface of the support body. The jacking tonnage of the jack 4 must meet the design requirements. When adjusting the jacking stroke of the jack, it should be lifted in combination with the vertical cracking degree of the cantilever root of the cantilever pier of the bridge on the construction site and the closing degree of the crack 1. After the jacking stroke (or jacking strength) of the jack 4 meets the requirements, fix the jacking stroke of the jack; use high-strength micro-expansion concrete to seal the surroundings of the jack 4, so that the jack 4 is permanently retained in the concrete under the corresponding holding force .
本发明的实施方式并不受上述实施例的限制，其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The implementation of the present invention is not limited by the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods, and are all included in within the protection scope of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499928.XA CN102953346B (en) | 2012-11-28 | 2012-11-28 | Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499928.XA CN102953346B (en) | 2012-11-28 | 2012-11-28 | Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102953346A true CN102953346A (en) | 2013-03-06 |
| CN102953346B CN102953346B (en) | 2015-07-01 |
Family
ID=47762689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210499928.XA Expired - Fee Related CN102953346B (en) | 2012-11-28 | 2012-11-28 | Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102953346B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468743A (en) * | 2019-07-31 | 2019-11-19 | 中铁大桥局集团有限公司 | A kind of traveling cradle and construction method for the transformation of old pier coping |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100840191B1 (en) * | 2007-12-24 | 2008-06-23 | 노윤근 | Bridge section extension method using steel composite concrete pipe with adjustable height |
-
2012
- 2012-11-28 CN CN201210499928.XA patent/CN102953346B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100840191B1 (en) * | 2007-12-24 | 2008-06-23 | 노윤근 | Bridge section extension method using steel composite concrete pipe with adjustable height |
Non-Patent Citations (2)
| Title |
|---|
| 单成林: "大跨悬臂空心桥墩病害成因分析及加固对策", 《中外公路》 * |
| 杨炜: "大悬臂空心墩悬臂端结构裂缝病害的加固处理", 《企业科技与发展》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468743A (en) * | 2019-07-31 | 2019-11-19 | 中铁大桥局集团有限公司 | A kind of traveling cradle and construction method for the transformation of old pier coping |
| CN110468743B (en) * | 2019-07-31 | 2020-12-01 | 中铁大桥局集团有限公司 | Movable hanging bracket for transformation of old bridge pier cap and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102953346B (en) | 2015-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206635791U (en) | A kind of packaged type bridges pillarwork | |
| CN106592419B (en) | A kind of connecting structure and its dock construction method of precast pier and prefabricated cushion cap | |
| CN104153284A (en) | Partial filling type steel box concrete continuous composite girder bridge and construction method thereof | |
| CN105887875A (en) | Flexible connection structure for pile and pile cap and construction method | |
| CN103711078A (en) | Temporary girder-type support for bridge construction and dismantling method thereof | |
| CN102031755B (en) | Multifunctional permanent template for girder bridge gravity type pier | |
| CN207143733U (en) | A kind of simple-supported thencontinuous bridge system converting system | |
| CN102979042B (en) | Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device | |
| CN203200656U (en) | Light corrugated steel-high strength reactive powder concrete combined bridge deck slab | |
| CN105088961B (en) | The construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment | |
| CN110172927A (en) | The span centre of prestressed concrete continuous beam and continuous rigid frame closes up section constructing method | |
| CN206706804U (en) | A kind of bridge pier column structure | |
| CN206956519U (en) | A kind of steel box girder bridge pave-load layer pre-stress system | |
| CN103552911B (en) | A kind of movable boom hoisting and the construction installation method of use thereof | |
| CN102392416A (en) | Pier-beam temporary consolidation post-installed fastening system construction method | |
| CN104452574A (en) | Novel ramp bridge structure and construction method thereof | |
| CN102953346B (en) | Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap | |
| CN204491412U (en) | A kind of hollow sheet hinge crack structure | |
| CN202945549U (en) | Reinforcing device with root portion being cracked vertically of bridge cantilever pier cap | |
| CN208219415U (en) | A kind of mixed composite beam bridge pre-bending structure of the steel-using preflex beam | |
| CN104612142A (en) | Integral abutment bridge structure based on composite flexible piles and construction method thereof | |
| CN201952733U (en) | Multifunctional permanent template for a beam bridge gravity type pier | |
| CN204325947U (en) | A kind of unloading consolidation device for simply supported girder bridge | |
| CN207143706U (en) | A kind of steel box girder bridge once falls frame system | |
| CN110055905B (en) | A new type of reinforcement method for assembled masonry arches |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220817 Address after: 510665 Room 504, No. 6, Fifth Lane, Suinan New Village, Tangxia, Tianhe District, Guangzhou City, Guangdong Province, China Patentee after: Guangdong Golden Shield Reinforcement Engineering Co., Ltd. Address before: 510640 No. five, 381 mountain road, Guangzhou, Guangdong, Tianhe District Patentee before: SOUTH CHINA University OF TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |