CN105525572A - Method for replacing hogging moment prestressed tendons of T-shaped beams by artfully using jack - Google Patents
Method for replacing hogging moment prestressed tendons of T-shaped beams by artfully using jack Download PDFInfo
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- CN105525572A CN105525572A CN201410573815.9A CN201410573815A CN105525572A CN 105525572 A CN105525572 A CN 105525572A CN 201410573815 A CN201410573815 A CN 201410573815A CN 105525572 A CN105525572 A CN 105525572A
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- jack
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- negative moment
- replacing
- prestressing tendon
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Abstract
The invention provides a method for replacing hogging moment prestressed tendons of T-shaped beams by artfully using a jack. Constructors use pneumatic picks to chisel off concrete on the surfaces of continuous sections at the tops of piers until corrugated pipes are exposed, and then the constructors use blades to cut the corrugated pipes so as to check the damaged conditions of prestressed steel strands and make marks. By using the jack for replacing the hogging moment prestressed tendons of the T-shaped beams, the construction is convenient and fast, the manpower and material resources are saved, the construction period is shortened, and the damage to beam bodies is greatly reduced. Therefore, the method has wide popularization significance in the aspects of maintenance and removal of old bridges. The method provided by the invention also has the advantages of simple and compact structure, low manufacturing cost and simplicity and convenience in use.
Description
Technical field
The present invention relates to a kind of T negative moment of girder prestressing tendon, specifically T negative moment of girder prestressing tendon changed by a kind of skilful use jack.
Background technology
In bridge periodic detection process, be detected T negative moment of girder prestressing force and be badly damaged, owner arranges my unit to launch maintenance work immediately, must possess train-passing through conditions before requiring October 1.Because the duration is tight, task weight, group company issues an order, and sends experienced personnel and forms group of helping build temporarily, keep in repair old bridge from project management department belonging to the company of Sichuan-chongqing Region.Traditional T negative moment of girder prestressing tendon changes construction, adopts the construction of longitudinal grooved method, larger to the steel concrete damage of beam body.Jack is used to remove T negative moment of girder prestressed strand, convenient and swift, save a large amount of human and material resources, and shorten the construction period greatly, task of making group company give my unit is advanced by 8 days and completes, and obtains the accreditation of group company and associate organization, and promotes the use immediately.
Summary of the invention
The object of this invention is to provide a kind of skilful use jack and change T negative moment of girder prestressing tendon, can solve the problem.
The present invention for achieving the above object, be achieved through the following technical solutions: T negative moment of girder prestressing tendon changed by a kind of skilful use jack, construction operation personnel adopt pneumatic pick to cut pier top continuous segment surface concrete, until expose bellows, with blade, bellows is cut open, check prestress wire damage situations, and carry out mark.
In order to realize object of the present invention further, can also by the following technical solutions: construction operation personnel, under the precondition carrying out security protection, set foot on working platform and formerly before perform tooth block end at the bottom of the beam changing mark, remove intermediate plate and ground tackle.After intermediate plate and ground tackle are removed, at continuous segment top, pier top, steel strand are cut off, carry out putting and open, put a process and carry out safety precautions.Because of prestressed pore passage mud jacking, tear open to tighten and cannot extract steel strand by manpower, traditional measure is the method adopting longitudinal grooved, through interim group personnel research of helping build temporarily, finally maked decision by group leader Chen Dengyu, adopt jack method to carry out tearing bundle open, and install baffle plate within the scope of 10 meters, front and back, carry out safety prevention measure.
The invention has the advantages that: adopt jack method to change bundle, convenient and quick construction to T negative moment of girder prestressing force, saved human and material resources, shortened the construction period, and substantially reduced the damage to beam body.Therefore, in old bridge maintaining and dismounting, there is dissemination widely.The present invention also has advantage compact, cheap for manufacturing cost and easy to use simple for structure.
Accompanying drawing explanation
Fig. 1 is construction sequence first step schematic diagram of the present invention; Fig. 2 is construction sequence second step schematic diagram of the present invention; Fig. 3 is construction sequence of the present invention 3rd step schematic diagram; Fig. 4 is construction sequence of the present invention 4th step schematic diagram.
Detailed description of the invention
T negative moment of girder prestressing tendon changed by skilful use jack, and as shown in Figure 1, Figure 2, Figure 3 and Figure 4, construction operation personnel adopt pneumatic pick to cut pier top continuous segment surface concrete, until expose bellows, with blade, bellows is cut open, check prestress wire damage situations, and carry out mark.
In order to realize object of the present invention further, can also by the following technical solutions: construction operation personnel, under the precondition carrying out security protection, set foot on working platform and formerly before perform tooth block end at the bottom of the beam changing mark, remove intermediate plate and ground tackle.After intermediate plate and ground tackle are removed, at continuous segment top, pier top, steel strand are cut off, carry out putting and open, put a process and carry out safety precautions.Because of prestressed pore passage mud jacking, tear open to tighten and cannot extract steel strand by manpower, traditional measure is the method adopting longitudinal grooved, through interim group personnel research of helping build temporarily, finally maked decision by group leader Chen Dengyu, adopt jack method to carry out tearing bundle open, and install baffle plate within the scope of 10 meters, front and back, carry out safety prevention measure.
The invention has the advantages that: adopt jack method to change bundle, convenient and quick construction to T negative moment of girder prestressing force, saved human and material resources, shortened the construction period, and substantially reduced the damage to beam body.Therefore, in old bridge maintaining and dismounting, there is dissemination widely.The present invention also has advantage compact, cheap for manufacturing cost and easy to use simple for structure.
Technical scheme of the present invention is not restricted in the scope of embodiment of the present invention.The technology contents of the not detailed description of the present invention is known technology.
Claims (4)
1. skilfully use jack and change T negative moment of girder prestressing tendon, it is characterized in that: construction operation personnel adopt pneumatic pick to cut pier top continuous segment surface concrete, until expose bellows, are cut open by bellows with blade, check prestress wire damage situations, and carry out mark.
2. T negative moment of girder prestressing tendon changed by skilful use jack according to claim 1, it is characterized in that: construction operation personnel are under the precondition carrying out security protection, set foot on working platform and formerly before perform tooth block end at the bottom of the beam changing mark, remove intermediate plate and ground tackle.
3. T negative moment of girder prestressing tendon changed by skilful use jack according to claim 1, it is characterized in that: after intermediate plate and ground tackle are removed, cut off by steel strand at continuous segment top, pier top, carries out putting and opens, put a process and carry out safety precautions.
4. T negative moment of girder prestressing tendon changed by skilful use jack according to claim 1, it is characterized in that: because of prestressed pore passage mud jacking, tear open to tighten and cannot extract steel strand by manpower, traditional measure is the method adopting longitudinal grooved, through interim group personnel research of helping build temporarily, finally maked decision by group leader Chen Dengyu, adopt jack method to carry out tearing bundle open, and baffle plate is installed within the scope of 10 meters, front and back, carry out safety prevention measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573815.9A CN105525572A (en) | 2014-10-24 | 2014-10-24 | Method for replacing hogging moment prestressed tendons of T-shaped beams by artfully using jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573815.9A CN105525572A (en) | 2014-10-24 | 2014-10-24 | Method for replacing hogging moment prestressed tendons of T-shaped beams by artfully using jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105525572A true CN105525572A (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410573815.9A Pending CN105525572A (en) | 2014-10-24 | 2014-10-24 | Method for replacing hogging moment prestressed tendons of T-shaped beams by artfully using jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105525572A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862601A (en) * | 2016-05-13 | 2016-08-17 | 铁道第三勘察设计院集团有限公司 | Method for reducing negative bending moment of T-type rigid bridge |
| CN112982188A (en) * | 2021-02-10 | 2021-06-18 | 同济大学 | Method for rebuilding or adding vertical prestress to active concrete bridge |
| CN112982187A (en) * | 2021-02-10 | 2021-06-18 | 同济大学 | Method for replacing curve prestressed steel beam in damaged bridge body and reinforcing bridge structure |
-
2014
- 2014-10-24 CN CN201410573815.9A patent/CN105525572A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862601A (en) * | 2016-05-13 | 2016-08-17 | 铁道第三勘察设计院集团有限公司 | Method for reducing negative bending moment of T-type rigid bridge |
| CN112982188A (en) * | 2021-02-10 | 2021-06-18 | 同济大学 | Method for rebuilding or adding vertical prestress to active concrete bridge |
| CN112982187A (en) * | 2021-02-10 | 2021-06-18 | 同济大学 | Method for replacing curve prestressed steel beam in damaged bridge body and reinforcing bridge structure |
| CN112982188B (en) * | 2021-02-10 | 2022-06-14 | 同济大学 | Method for rebuilding or adding vertical prestress to active concrete bridge |
| CN112982187B (en) * | 2021-02-10 | 2022-06-21 | 同济大学 | Method for replacing curve prestressed steel beam in damaged bridge body and reinforcing bridge structure |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160427 |