CN102943456B - Setting method and structure of after-dam traffic of concrete dam - Google Patents

Setting method and structure of after-dam traffic of concrete dam Download PDF

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Publication number
CN102943456B
CN102943456B CN201210340128.3A CN201210340128A CN102943456B CN 102943456 B CN102943456 B CN 102943456B CN 201210340128 A CN201210340128 A CN 201210340128A CN 102943456 B CN102943456 B CN 102943456B
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China
Prior art keywords
dam
concrete
traffic
precast concrete
reinforcing bar
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CN201210340128.3A
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Chinese (zh)
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CN102943456A (en
Inventor
罗洪波
徐林
陈毅峰
颜加珍
刘杰
张艳霞
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中国水电顾问集团贵阳勘测设计研究院
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Priority to CN201210340128.3A priority Critical patent/CN102943456B/en
Publication of CN102943456A publication Critical patent/CN102943456A/en
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Publication of CN102943456B publication Critical patent/CN102943456B/en

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Abstract

The invention discloses a setting method of after-dam traffic of a concrete dam, wherein the method comprises the following steps: when raising a concrete dam (5) to the elevation needing to set the after-dam traffic, placing a prefabricated concrete beam (1) on a horizontal positioning steel rail (2) according to design needs to perform elevation positioning, using a transverse fixing reinforcing bar (3) to penetrate through a prepared hole (4) of the prefabricated concrete beam (1) to perform transverse positioning, and then pouring dam concrete so as to form the after-dam traffic. The invention also discloses a setting structure of the after-dam traffic of the concrete dam. The method and structure provided by the invention resolves problems of appearance pouring quality and overhanging supporting construction by the prefabricated concrete beam, combines the positioning steel rail with the transverse fixing reinforcing bar to perform positioning in an elevation direction and a horizontal direction to realize one-time formation of the after-dam traffic. The method and structure provided by the invention has the advantages of good appearance and quality, safety and reliability, and convenience in operation, and is worthy of promotion.

Description

Traffic method to set up and structure after concrete dam
Technical field
The present invention relates to the dam technical field in Hydraulic and Hydro-Power Engineering, particularly relate to traffic method to set up and structure after a kind of concrete dam.
Background technology
After concrete dam, traffic setting need possess the functional requirement of meeting, the features such as little, profile neat appearance are disturbed in construction, due to the casting of concrete in mass feature of concrete dam, precision control is difficult to reach perfect condition, if pressing the control accuracy of concrete in mass implements, behind the dam often forming, traffic presentation quality is poor, needs secondary finishing; Implement if press the control accuracy of traffic behind dam, will affect the rate of climb of building of concrete in mass.And in traditional work progress, generally there are two kinds of processing methods: the one, pre-doweling, the later stage constructs by setting up scaffold etc.; The 2nd, adopt steel work.All there is certain defect in these two kinds of processing methods, the former need to set up the high scaffold of quantity as construction supporting platform for the higher position of traffic platform, latter rocks larger when in running, particularly flood discharge shakes, and exists corrosion to repair the problems such as poor durability.Therefore, traffic method to set up and structure or undesirable after existing concrete dam.
Summary of the invention
The object of the invention is for overcoming the defect in the inharmonious and processing method of prior art control accuracy, provide that a kind of precision is high, construction is convenient, good stability, and there is traffic method to set up and structure after the concrete dam of good impression quality.
For realizing object of the present invention, traffic method to set up after a kind of concrete dam of the present invention, wherein, the method be when concrete dam rise to need to dam be set after on the elevation of traffic time, according to design needs, precast concrete beam is placed on horizontal location rail, carry out elevation location, utilize laterally fixing reinforcing bar to carry out located lateral through the preformed hole of precast concrete beam, form traffic behind dam thereby build again thereafter dam concrete.
Further, traffic method to set up after above-mentioned concrete dam, wherein, described precast concrete beam center of gravity, on dam body, does not need additional support outside dam.The part of encorbelmenting is outer thin interior thick, imbeds dam concrete part suitable with the partial-length of encorbelmenting, but thickness remains unchanged, thereby ensures that precast concrete beam center of gravity is in dam body, does not need additional support dam outside just can be certainly surely.Utilize precast concrete beam to make the higher feature of precision control, effective guarantee presentation quality.
Further, traffic method to set up after above-mentioned concrete dam, wherein, it is the i iron of I20a or the above intensity of I20a that described horizontal location rail adopts i iron model, like this can be in order to ensure that locating rail has enough intensity and stability to bear precast concrete beam weight.
Further, traffic method to set up after above-mentioned concrete dam, wherein, technique scheme adopts laterally fixing reinforcing bar, through the located lateral preformed hole of precast concrete beam, play the effect of polylith precast concrete beam horizontal alignment, for ensureing laterally to fix the reliability of reinforcing bar, laterally fixing reinforcing bar need have some strength, and be closely connected with the located lateral preformed hole of precast concrete beam, therefore requiring fixing bar diameter is 20mm~32mm, than the reserved little 20mm in aperture of precast concrete beam, so that not only can be smoothly through preformed hole but also can be closely connected with preformed hole, thereby reach the object of located lateral.
For realizing traffic structure after a kind of concrete dam of said method, comprise concrete dam, wherein, be provided with side by side at least two row of horizontal location rail in concrete dam inside, on horizontal location rail, be provided with the precast concrete beam of trapezium structure, heavier one end of precast concrete beam is positioned at concrete dam inside, and the other end is chosen in concrete dam outside with cantilevered fashion; Be positioned at the preformed hole that is provided with two parallel perforations on one end of concrete dam inside at precast concrete beam, in preformed hole, be provided with laterally fixing reinforcing bar.
Owing to having adopted technique scheme, compared with traffic treatment technology behind original dam, the present invention utilizes precast concrete beam to solve behind the dam of prior art the bad and problems such as Construction of Supporting inconvenience of encorbelmenting of traffic structure outward appearance pouring quality, in conjunction with locating rail and laterally fixing reinforcing bar, carry out elevation and horizontal direction location, realized the disposable shaping of traffic behind dam.The present invention has the advantages such as presentation quality is good, safe and reliable, easy construction, is worthy to be popularized.
brief description of the drawings
Fig. 1 is structural representation of the present invention.
Description of reference numerals: 1-precast concrete beam, 2-horizontal location rail, 3-laterally fixes reinforcing bar, 4-preformed hole, 5-concrete dam.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
See Fig. 1, traffic structure after a kind of concrete dam of the present invention, comprise concrete dam 5, be provided with side by side at least two row of horizontal location rail 2 in concrete dam 5 inside, on horizontal location rail 2, be provided with the precast concrete beam 1 of trapezium structure, heavier one end of precast concrete beam 1 is positioned at concrete dam 5 inside, and the other end is chosen in concrete dam 5 outsides with cantilevered fashion; Be positioned at the preformed hole 4 that is provided with two parallel perforations on one end of concrete dam 5 inside at precast concrete beam 1, in preformed hole 4, be provided with laterally fixing reinforcing bar 3.
The part of encorbelmenting of precast concrete beam 1 of the present invention is outer thin interior thick, imbeds dam concrete part suitable with the partial-length of encorbelmenting, but thickness remains unchanged, thereby ensures that precast concrete beam 1 center of gravity is in dam body, does not need additional support dam outside just can be certainly surely.Utilize precast concrete beam 1 to make the higher feature of precision control, effective guarantee presentation quality.It is the i iron of I20a or the above intensity of I20a that described horizontal location rail 2 adopts i iron model, like this can be in order to ensure that horizontal location rail 2 has enough intensity and stability to bear precast concrete beam 1 weight.Technique scheme adopts laterally fixing reinforcing bar 3, through the located lateral preformed hole 4 of precast concrete beam 1, play the effect of polylith precast concrete beam 1 horizontal alignment, for ensureing laterally to fix the reliability of reinforcing bar 3, laterally fixing reinforcing bar 3 need have some strength, and be closely connected with the located lateral preformed hole 4 of precast concrete beam 1, therefore requiring laterally fixing reinforcing bar 3 diameters is 20mm~32mm, than the little 20mm in aperture of precast concrete beam 1 preformed hole 4, so that not only can be smoothly through preformed hole 4 but also can be closely connected with preformed hole 4, thereby reach the object of located lateral.
Embodiments of the present invention as shown in Figure 1, are prepared precast concrete beam 1 by design size, and the part of encorbelmenting is outer thin interior thick, and the part of 5 inside, Transducers Embedded in Concrete dam is suitable with the partial-length of encorbelmenting, and the thickness of inlet part remains unchanged.In the time that concrete dam 5 is poured into design altitude, lay horizontal location rail 2 along designed lines, precast concrete beam 1 is placed on horizontal location rail 2, the located lateral reinforcing bar 3 that utilization is through in the preformed hole 4 on precast concrete beam 1 is adjusted precast concrete beam 1 planeness in the horizontal direction, builds thereafter traffic behind the disposable formation of dam concrete dam again.
Embodiments of the present invention as shown in Figure 1, are prepared precast concrete beam 1 by design size, and the part of encorbelmenting is outer thin interior thick, and the part of 5 inside, Transducers Embedded in Concrete dam is suitable with the partial-length of encorbelmenting, and the thickness of inlet part remains unchanged.In the time that concrete dam 5 is poured into design altitude, lay horizontal location rail 2 along designed lines, precast concrete beam 1 is placed on horizontal location rail 2, the located lateral reinforcing bar 3 that utilization is through in the preformed hole 4 on precast concrete beam 1 is adjusted precast concrete beam 1 planeness in the horizontal direction, builds thereafter traffic behind the disposable formation of dam concrete dam again.

Claims (5)

1. traffic method to set up after a concrete dam, it is characterized in that: the method be when concrete dam (5) rise to need to dam be set after on the elevation of traffic time, according to design needs, precast concrete beam (1) is placed on horizontal location rail (2), carry out elevation location, utilize laterally fixing reinforcing bar (3) to carry out located lateral through the preformed hole (4) of precast concrete beam (1), form traffic behind dam thereby build again thereafter dam concrete.
2. traffic method to set up after concrete dam according to claim 1, is characterized in that: described precast concrete beam (1) center of gravity, on dam body, does not need additional support outside dam.
3. traffic method to set up after concrete dam according to claim 1, is characterized in that: it is the i iron of I20a or the above intensity of I20a that described horizontal location rail (2) adopts i iron model.
4. traffic method to set up after concrete dam according to claim 1, is characterized in that: described laterally fixing reinforcing bar (3) diameter is 20mm~30mm, than the little 20mm in aperture of the preformed hole (4) on precast concrete beam (1).
5. traffic structure after a concrete dam, comprise concrete dam (5), it is characterized in that: be provided with side by side at least two row of horizontal location rail (2) in concrete dam (5) inside, on horizontal location rail (2), be provided with the precast concrete beam (1) of trapezium structure, heavier one end of precast concrete beam (1) is positioned at concrete dam (5) inside, and the other end is chosen in concrete dam (5) outside with cantilevered fashion; Be positioned at the preformed hole (4) that is provided with two parallel perforations on the inner one end of concrete dam (5) at precast concrete beam (1), in preformed hole (4), be provided with laterally fixing reinforcing bar (3).
CN201210340128.3A 2012-09-14 2012-09-14 Setting method and structure of after-dam traffic of concrete dam CN102943456B (en)

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CN102943456B true CN102943456B (en) 2014-11-26

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1093750A1 (en) * 1983-02-09 1984-05-23 Научно-Исследовательский Институт Строительного Производства Dam of locally available materials
JPH08128029A (en) * 1994-11-01 1996-05-21 Dam Suigenchi Kankyo Seibi Center Fishladder device for river crossing structure having middle and high head
CN101058974A (en) * 2005-12-21 2007-10-24 中国水利水电第一工程局 Once forming construction technique for concrete panel rock fill dam bedding material and slope fixing mortar
CN200978430Y (en) * 2006-12-07 2007-11-21 中国水电顾问集团华东勘测设计研究院 Concrete dam joint structure
CN102277852A (en) * 2011-05-04 2011-12-14 杨凌职业技术学院 Teaching model for construction of earth and rockfill dam
CN202787049U (en) * 2012-09-14 2013-03-13 中国水电顾问集团贵阳勘测设计研究院 Novel traffic bridge after dam

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1093750A1 (en) * 1983-02-09 1984-05-23 Научно-Исследовательский Институт Строительного Производства Dam of locally available materials
JPH08128029A (en) * 1994-11-01 1996-05-21 Dam Suigenchi Kankyo Seibi Center Fishladder device for river crossing structure having middle and high head
CN101058974A (en) * 2005-12-21 2007-10-24 中国水利水电第一工程局 Once forming construction technique for concrete panel rock fill dam bedding material and slope fixing mortar
CN200978430Y (en) * 2006-12-07 2007-11-21 中国水电顾问集团华东勘测设计研究院 Concrete dam joint structure
CN102277852A (en) * 2011-05-04 2011-12-14 杨凌职业技术学院 Teaching model for construction of earth and rockfill dam
CN202787049U (en) * 2012-09-14 2013-03-13 中国水电顾问集团贵阳勘测设计研究院 Novel traffic bridge after dam

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