Control method for transverse joint binding strength of concrete dam

A technology for bonding strength and concrete dams, applied in water conservancy projects, marine engineering, construction, etc., can solve the problems of late opening of transverse joints, inability to effectively control the bonding strength, and difficulty in accurately grasping the closing and opening process of transverse joints, etc. Achieve the effect of ready conditions in place in time

Active Publication Date: 2012-07-04
TSINGHUA UNIV +1
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Problems solved by technology

Due to the lack of consideration of the bond strength of the transverse joint, the traditional method is not perfect in understanding the closure state of the transverse joint, and cannot effectively control the bond strength. It is difficult to accurately grasp the opening process of the transverse joint, which may lead to The problem of delaying the timing of grouting due to late opening

Method used

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  • Control method for transverse joint binding strength of concrete dam
  • Control method for transverse joint binding strength of concrete dam
  • Control method for transverse joint binding strength of concrete dam

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Embodiment approach

[0034] On the basis of the prior art, the present invention further considers the bond strength of the transverse joint, and realizes the control of the bond strength of the transverse joint by formulating relevant indexes, laying out monitoring instruments and controlling relevant construction measures. The specific method can be implemented as follows:

[0035] 1) In the design stage of concrete dams, including arch dams and gravity dams, control indicators should be formulated according to the design and construction progress and construction specifications, including the joint grouting time τ of each irrigation area g , the latest opening time τ specified in each irrigation district c and joint grouting minimum required opening W g , where τ c g , it is generally recommended that τ c Choose in the mid-term cooling stage, W g Depending on the grouting method, there are different specification requirements for cement grouting and chemical grouting. First of all, the relat...

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Abstract

The invention provides a control method for transverse joint binding strength of a concrete dam, and relates to a method for controlling opening degree of a transverse joint and preventing the phenomenon that the transverse joint is difficult to open in time during the concrete dam construction period. According to the invention, on the basis of the prior art, the transverse joint binding strength is further considered, and the control on the transverse joint binding strength is realized by a method of establishing correlated indexes, arranging a monitoring instrument and controlling specific construction measures. According to the control method, a dynamic monitoring arrangement scheme, a monitoring data utilization method, and specific controlling parameters and controlling means are provided for the correlated techniques in the construction process, thus the preparation conditions for joint grouting are guaranteed to be timely and targeted under the instruction of the method.

Description

technical field [0001] The invention relates to a method for controlling the joint structure in a hydraulic structure, in particular to the control of the bonding strength and opening degree of the transverse joint and the prevention method for the difficult opening of the transverse joint during the construction of a concrete dam. Background technique [0002] In the construction of concrete dams such as gravity dams and arch dams, it is necessary to set a number of transverse joints perpendicular to the dam axis to adapt to the pouring capacity of the construction and the uneven settlement of the foundation, and to reduce the temperature stress. Joint grouting is a key time node in the construction period of the concrete dam body. Before the joint grouting, it is necessary to ensure that the transverse joints are opened enough to facilitate the smooth development of the joint grouting work. It can be seen that the control technology of the transverse joint opening is very i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16
Inventor 胡昱李庆斌林鹏左正汪志林周绍武杨剑罗丹旎
Owner TSINGHUA UNIV
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