CN110835888A - Construction method for leveling top surface of secondary beam falling support after jacking - Google Patents

Construction method for leveling top surface of secondary beam falling support after jacking Download PDF

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Publication number
CN110835888A
CN110835888A CN201911186940.3A CN201911186940A CN110835888A CN 110835888 A CN110835888 A CN 110835888A CN 201911186940 A CN201911186940 A CN 201911186940A CN 110835888 A CN110835888 A CN 110835888A
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CN
China
Prior art keywords
support
mortar
jacking
falling
template
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Pending
Application number
CN201911186940.3A
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Chinese (zh)
Inventor
孙辉
黄顺旺
唐彬
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Sichuan Chengtong Reinforcement Engineering Co Ltd
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Sichuan Chengtong Reinforcement Engineering Co Ltd
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Priority to CN201911186940.3A priority Critical patent/CN110835888A/en
Publication of CN110835888A publication Critical patent/CN110835888A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges

Abstract

The invention discloses a construction method for leveling the top surface of a post-jacking secondary beam-falling support. The mortar is used for leveling the support, the mortar can be automatically leveled according to the shape of the bottom of the beam body, the defects that steel plates easily slide down due to the fact that steel plate pads are used for leveling and the support cannot be in full contact with the beam body to cause support bias are overcome, the upper top surface of the support can be guaranteed to be in full contact with the bottom of the beam, and the support is enabled to be stressed uniformly.

Description

Construction method for leveling top surface of secondary beam falling support after jacking
Technical Field
The invention relates to the technical field of road and bridge construction, in particular to a construction method for leveling the top surface of a secondary beam falling support after jacking.
Background
As the highway built in the first batch in China is communicated for more than 10 years, the highway bridge enters the maintenance peak. The bridge support is an important component for connecting the upper part and the lower part of a bridge, and the normal design and the service life of the bridge support are about 10 to 15 years according to different types. When the bridge support reaches the design life or the condition of diseases is found in bridge detection, a new bridge support needs to be replaced.
The existing process for replacing the bridge support comprises the steps of using a full-automatic jacking system to jack the whole beam body away from the surface of the support, taking out an old support, replacing a new support, synchronously and integrally dropping the beam, and completing the replacement. In the process, the contact position of the top surface of the newly replaced support and the beam bottom can cause various defects of bias pressure, local compression, uneven compression, void and the like of the new support due to various shapes of the beam bottom.
In order to solve various diseases after the replacement of a new support, one of the common treatment methods is to pad and plug a gap between the bottom of a beam and the top surface of the support layer by using thin steel plates.
The other method is to use a wedge-shaped steel plate pad plug between the beam bottom and the top surface of the support, and the method has the defects that the shape of each gap is not completely the same, the gap needs to be processed independently, time and labor are wasted, the shape of the beam bottom and the top surface of the support can be measured only when the beam is completely jacked away from the support and is in a void state, and the beam is in the void state for a long time, so that the bridge is extremely unsafe.
Disclosure of Invention
In order to overcome the defects, the inventor of the invention finds out 'secondary beam falling after beam body jacking and construction method for leveling top surface of the support seat by adopting quick-hardening mortar' through long-term exploration and trial and a plurality of experiments and endeavors, continuously reforms and innovates in order to better solve the problem of diseases during support seat replacement, and forms a high-strength and compact filling body between the bottom of the beam and the top surface of the support seat, so that the newly replaced support seat is integrally and uniformly pressed, and the service life of the support seat and the bridge is prolonged.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a construction method for leveling the top surface of a secondary beam falling support after jacking comprises the following steps:
s1, jacking the whole beam body to a proper height, and taking out the old support;
s2, polishing the top surface and the bottom of the support base cushion stone, and removing loose concrete;
s3, coating epoxy mortar on the top of the cushion stone to enable the top surface of the cushion stone to be flat;
s4, winding the periphery of the support with a tape and protruding 10mm above the upper top surface of the support, wherein the jacking height of the beam is generally not more than 10mm, so that the height of the beam is preferably about 10mm in order to ensure the safety of the beam, forming a template with the height of 10mm on the upper top surface of the support, and cutting openings at the upper parts of four corners of the template, wherein the openings are vertical cutting lines, so that mortar cannot flow out when being tiled, and excessive mortar can only flow out under pressure extrusion;
s5, preparing high-strength quick-hardening mortar dry materials according to the mixing proportion requirement, firstly, adding no water, and preparing quantitative water for later use, wherein mature products are purchased, and the different mixing proportions are used according to the use instructions of the products installed and purchased by different products;
s6, jacking the beam body by 5-10 mm according to the requirement of replacing or adjusting the support;
s7, pouring water into the prepared mortar, quickly stirring, and quickly pouring into a template on the upper top surface of the support;
s8, accurately positioning the support, wherein the support is accurately positioned according to the design requirement;
s9, immediately falling the beam for the first time, allowing redundant mortar to flow out from four corners of the template, and allowing the beam body to fall to an original elevation position, wherein the original elevation refers to a position before jacking, and when the support is empty or biased, and the like, namely the height before jacking, only part of the support is pressed, and part of the support is provided with a gap; then, a jack is used for holding and pressing until the strength of the mortar reaches more than 30MPA, and the concrete strength is based on experimental data due to different regions and seasons; the experimental data is that the high-strength rapid-hardening mortar is sensitive to temperature, and an experiment is carried out before engineering construction to ensure that the time required by adding water into the mortar and stirring the mortar to reach 30MPA is used for determining the second beam falling interval time;
s10, carrying out secondary beam falling according to the experimental data, and unloading the jack; the second beam falling means that the jack is not stressed any more, and the gravity of the beam body is borne by the support;
and S11, removing the adhesive tape, cleaning mortar on the periphery of the support and finishing jacking.
The beneficial effect of prior art is compared in this application:
1. the mortar leveling support is adopted, the mortar can be automatically leveled according to the shape of the bottom of the beam body, the defects that steel plates easily slide down due to steel plate cushions and the support cannot be in full contact with the beam body to cause support bias voltage are overcome, the upper top surface of the support can be ensured to be in full contact with the bottom of the beam, and the support is enabled to be stressed uniformly.
2. The process of the invention adopts high-strength rapid hardening mortar, better contacts the support with the beam bottom, and overcomes the defect of insufficient strength caused by a glue injection method.
3. The process of the invention adopts high-strength quick-hardening mortar, greatly improves the efficiency of replacing or leveling the support, and greatly reduces bridge risks, traffic risks and construction risks.
4. The invention adopts secondary beam falling, namely, the mortar can be filled in the gap between the support and the beam bottom, the integral stress of the support is ensured, and the service lives of the support and the bridge are prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a block diagram of the operational flow of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.
Example 1
Figure 1 shows a block flow diagram of the present invention,
in the embodiment, the road and bridge support of the urban road and the: the construction in the month of 6 is specifically operated as a construction method for leveling the top surface of a secondary beam-falling support after jacking, and the construction method comprises the following steps:
and S1, jacking the whole beam body to 10mm by adopting a full-automatic jacking system, and taking out the old support. The jacking height is determined by constructors according to the actual situation of the site to be finely adjusted, the old support can be taken out without jacking to 10mm, the old support can be taken out only when the jacking is required to exceed 10mm, the jacking height is not reduced under the condition that the old support can be taken out, and the bridge is safer.
S2, polishing the top surface and the bottom of the support base pad stone by a constructor by using an angle grinder, and removing loose concrete;
s3, coating epoxy mortar on the top of the cushion stone to enable the top surface of the cushion stone to be flat;
s4, winding the periphery of the support with adhesive tapes and protruding 10mm above the upper top surface of the support, forming a template with the height of 10mm on the upper top surface of the support, and cutting openings at the upper parts of four corners of the template; the concrete operation is that a line is vertically cut at four corners of the template, so that mortar cannot flow out when being tiled, and excessive mortar can overflow under pressure extrusion;
s5, selecting corresponding products according to the instructions of purchased products and the field conditions, preparing high-strength quick-hardening mortar dry materials according to the mixing proportion requirements, firstly adding no water, and preparing quantitative water for later use;
s6, jacking the beam body by 10mm according to the requirement of replacing the support;
s7, pouring water into the prepared mortar, quickly stirring, and quickly pouring into a template on the upper top surface of the support;
s8, accurately positioning the support according to the design requirement;
s9, immediately carrying out first beam falling, allowing redundant mortar to flow out from four corners of the template, allowing the beam body to fall to the original elevation position, and keeping the pressure by using a jack until the mortar strength reaches 31MPA for 25 +/-1 minutes;
s10, carrying out secondary beam falling and unloading the jack;
and S11, removing the adhesive tape, cleaning mortar on the periphery of the support and finishing jacking.
Example 2
In the embodiment, the road and bridge support of the urban road and the: the construction in 10 months is specifically operated as a construction method for leveling the top surface of a secondary beam-falling support after jacking, and comprises the following steps:
s1, jacking the whole beam body to a proper height by adopting automatic jacking equipment, and taking out the old support;
s2, polishing the top surface and the bottom of the support base pad stone by using an angle grinder, and removing loose concrete;
s3, coating epoxy mortar on the top of the cushion stone to enable the top surface of the cushion stone to be flat;
s4, winding the periphery of the support with adhesive tapes and protruding 10mm above the upper top surface of the support, forming a template with the height of 10mm on the upper top surface of the support, and cutting openings at the upper parts of four corners of the template;
s5, preparing high-strength quick-hardening mortar dry materials according to the mixing proportion requirement, firstly, not adding water, and preparing quantitative water for later use;
s6, jacking the beam body by 7mm according to the requirement of replacing the support;
s7, pouring water into the prepared mortar, quickly stirring, and quickly pouring into a template on the upper top surface of the support;
s8, accurately installing the support in place;
and S9, falling the beam for the first time, allowing the redundant mortar to flow out from four corners of the template, allowing the beam body to fall to the original elevation position, and keeping the beam body pressed by a jack until the mortar strength reaches about 35MPA and keeping the mortar strength for 29 +/-1 minutes.
S10, then, carrying out secondary beam falling and unloading the jack;
and S11, removing the adhesive tape, cleaning mortar on the periphery of the support and finishing jacking.
In the implementation process, the mortar leveling support is adopted, the mortar can be automatically leveled according to the shape of the bottom of the beam body, the defects that steel plates easily slide down due to the fact that steel plate pads are flat and the support cannot be in full contact with the beam body to cause support bias are overcome, the upper top surface of the support can be guaranteed to be in full contact with the bottom of the beam, and the support is enabled to be stressed uniformly.
Meanwhile, high-strength quick-hardening mortar is adopted, so that the support is better contacted with the beam bottom, and the defect of insufficient strength caused by a glue injection method is overcome. The efficiency of support change or leveling has been improved greatly, and bridge risk, traffic risk and construction risk have been reduced to a great extent. The secondary beam falling is adopted, namely, the mortar can be filled in the gap between the support and the beam bottom, the integral stress of the support is ensured, and the service lives of the support and the bridge are prolonged.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims (4)

1. A construction method for leveling the top surface of a secondary beam falling support after jacking is characterized by comprising the following steps:
s1, jacking the whole beam body to a proper height, and taking out the old support;
s2, polishing the top surface and the bottom of the support base cushion stone, and removing loose concrete;
s3, coating epoxy mortar on the top of the cushion stone to enable the top surface of the cushion stone to be flat;
s4, winding the periphery of the support with adhesive tapes and protruding 10mm above the upper top surface of the support, forming a template with the height of 10mm on the upper top surface of the support, and cutting openings at the upper parts of four corners of the template;
s5, preparing high-strength quick-hardening mortar dry materials according to the mixing proportion requirement, adding no water, and preparing quantitative water for later use;
s6, jacking the beam body by 5-10 mm according to the requirement of replacing or adjusting the support;
s7, pouring water into the prepared mortar, quickly stirring, and quickly pouring into a template on the upper top surface of the support;
s8, accurately positioning the support;
s9, immediately carrying out first beam falling, allowing redundant mortar to flow out from four corners of the template, allowing the beam body to fall to the original elevation position, and keeping the beam body pressed by a jack until the strength of the mortar reaches more than 30MPA, wherein the concrete strength is based on experimental data due to different regions and seasons;
s10, carrying out secondary beam falling and unloading the jack;
and S11, removing the adhesive tape, cleaning mortar on the periphery of the support and finishing jacking.
2. The construction method for leveling the top surface of the secondary beam falling support after jacking according to claim 1, characterized in that: the step of cutting openings at the upper parts of the four corners of the template in the step S4 is to vertically cut a line at the four corners of the template, so that mortar cannot flow out when being tiled, and excessive mortar can overflow under pressure extrusion.
3. The construction method for leveling the top surface of the secondary beam falling support after jacking according to claim 1, characterized in that: the original elevation in S9 is the height of the position before jacking.
4. The construction method for leveling the top surface of the secondary beam falling support after jacking according to claim 1, characterized in that: the experimental data in the S9 mean that the high-strength rapid-hardening mortar is sensitive to temperature, and an experiment is carried out before engineering construction to ensure that the time required for stirring the mortar by adding water to reach 30MPA is used for determining the second beam falling interval time.
CN201911186940.3A 2019-11-28 2019-11-28 Construction method for leveling top surface of secondary beam falling support after jacking Pending CN110835888A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111395206A (en) * 2020-03-20 2020-07-10 中铁大桥(南京)桥隧诊治有限公司 On-site deviation rectifying method for spherical support seat emptying

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100566665B1 (en) * 2005-12-08 2006-04-03 극동엔지니어링(주) A temporary bearing for jacking up upper structure of bridge
KR100961547B1 (en) * 2009-10-22 2010-06-07 신주영 Hydraulic lifting device, the bracket and the method for changing bridge bearings using them
CN104562924A (en) * 2014-12-31 2015-04-29 郑州航空工业管理学院 Self-elevating base plate change method for bridge support
CN104594203A (en) * 2014-12-31 2015-05-06 北京市市政专业设计院股份公司 Construction technology of upper pinner below beam body
CN104652291A (en) * 2014-12-31 2015-05-27 郑州航空工业管理学院 Pressure grouting replacement method of bridge support
CN104988845A (en) * 2015-07-17 2015-10-21 重庆桥都桥梁技术有限公司 Bridge bearer exchanging and newly-installation leveling method
CN105239502A (en) * 2015-11-07 2016-01-13 西安公路研究院 Uniform force transmission device used for bridge support and installation method of uniform force transmission device
CN106065576A (en) * 2015-04-23 2016-11-02 北京特希达新技术有限公司 Highway bridge increases bearing pre-applied force construction technology newly

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100566665B1 (en) * 2005-12-08 2006-04-03 극동엔지니어링(주) A temporary bearing for jacking up upper structure of bridge
KR100961547B1 (en) * 2009-10-22 2010-06-07 신주영 Hydraulic lifting device, the bracket and the method for changing bridge bearings using them
CN104562924A (en) * 2014-12-31 2015-04-29 郑州航空工业管理学院 Self-elevating base plate change method for bridge support
CN104594203A (en) * 2014-12-31 2015-05-06 北京市市政专业设计院股份公司 Construction technology of upper pinner below beam body
CN104652291A (en) * 2014-12-31 2015-05-27 郑州航空工业管理学院 Pressure grouting replacement method of bridge support
CN106065576A (en) * 2015-04-23 2016-11-02 北京特希达新技术有限公司 Highway bridge increases bearing pre-applied force construction technology newly
CN104988845A (en) * 2015-07-17 2015-10-21 重庆桥都桥梁技术有限公司 Bridge bearer exchanging and newly-installation leveling method
CN105239502A (en) * 2015-11-07 2016-01-13 西安公路研究院 Uniform force transmission device used for bridge support and installation method of uniform force transmission device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111395206A (en) * 2020-03-20 2020-07-10 中铁大桥(南京)桥隧诊治有限公司 On-site deviation rectifying method for spherical support seat emptying
CN111395206B (en) * 2020-03-20 2021-05-25 中铁桥隧技术有限公司 On-site deviation rectifying method for spherical support seat emptying

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Application publication date: 20200225