Construction method for rock-fill concrete dam

A technology of rockfill concrete and construction method, applied in water conservancy engineering, marine engineering, infrastructure engineering and other directions, can solve the problems of reducing the hydration heat of concrete, speeding up the construction speed, low construction speed, etc. Small volume and low cost

Inactive Publication Date: 2006-01-25
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the deficiencies and defects of the prior art, the purpose of the present invention is to provide a construction method of rock-fill concrete dams, which can effectively reduce the amount of cement and overcome the many procedures caused by traditional dam concrete construction, high cost and difficult construction. The defect of low speed can effectively reduce the heat of hydration of concrete. It has the characteristics of simple process, small heat insulation temperature rise, reduced construction links, and accelerated construction speed.

Method used

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  • Construction method for rock-fill concrete dam
  • Construction method for rock-fill concrete dam
  • Construction method for rock-fill concrete dam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Construction method of rockfill dam with concrete core wall

[0029] Such asfigure 2 As shown, a rockfill concrete core wall 8 is used as an anti-seepage body in a traditional rockfill dam to construct a rockfill concrete core wall rockfill dam.

[0030] First, fill the upstream dam body 6 and downstream dam body 7 uniformly in accordance with the requirements of the rockfill dam. However, during the filling process, grouting pipe 2 is buried in the core wall. When the dam body is filled to a certain construction layer thickness 5, use These grouting pipes 2 perform rockfill concrete construction to form a rockfill concrete core wall. In this construction method, the template 4 can be used for construction at all. After the flow of the self-compacting concrete 1 in the rockfill body stops, the rockfill concrete core wall is automatically formed. The joints can be constructed in the Mackinac way.

Embodiment 2

[0031] Example 2: Construction method of rockfill concrete mixed dam

[0032] The formwork 4 is erected on the upstream side of the dam, and the rockfill body 3 is filled first, and then the rockfill concrete construction is carried out on the upstream side to form a concrete retaining wall 9 on the upstream side, which is also used as an impermeable body, see image 3 . If the dam is taller, the upstream concrete retaining wall 9 has a larger thickness. Not only must the self-compacting concrete be poured from the grouting port reserved on the side 4 of the upstream formwork, but also the grouting pipe 2 needs to be pre-embedded from the top for pouring.

[0033] Due to the construction of rockfill concrete, the aggregates of the upstream gravity retaining wall 9 and the downstream rockfill body 7 bite each other, which facilitates the combined action of the two under the action of upstream water pressure.

[0034] This type of dam is compared with the rockfill concrete core wall...

Embodiment 3

[0035] Example 3: Construction method of rockfill concrete gravity dam or arch dam

[0036] In order to further reduce the volume of the dam, it is also possible to pour a rockfill concrete gravity dam or arch dam by injecting a full-face self-compacting concrete 1 to form a full-face rockfill concrete, see Figure 4 . This construction requires formwork 4 to be installed on the upstream and downstream sides. Since there is less cement in the rockfill concrete of the dam and the adiabatic temperature rise is low, it is possible to control the temperature control measures such as the injection temperature of the self-compacting concrete 1 of the dam, without burying the cooling water pipes, and carry out the pouring through the warehouse. On the basis, to achieve the purpose of rapid construction. In addition, combined with the rockfill concrete mixed dam, in a water conservancy hub, the rockfill concrete mixed dam is used as the retaining dam section, and the rockfill concrete grav...

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Abstract

The construction method of rockfill-concrete dam is one dam constructing method as the combination of concrete construction technology and rockfill dam construction technology and adopting one kind of concrete material with good flowability and high material separating resistance. The construction method of the present invention includes using un-sieved or initially sieved rockfill, introducing coarse aggregate in rockfill dam constructing process, pre-embedding grouting pipes to parts to form concrete, grouting concrete via the grouting pipes to void in rockfill to from the rockfill-concrete dam. With rockfill as aggregate can reduce cement consumption, lower cost, speed construction, lower the hydration heat of concrete, simplify process and reduce construction links.

Description

Technical field [0001] The invention relates to a dam construction method, in particular to a process method that uses concrete materials with good fluidity and strong material separation resistance, a grouting concrete construction technology and a rockfill dam construction technology to be used in dam construction. Background technique [0002] Due to the large volume of dam concrete, the hydration heat and cost of concrete should be minimized, that is, the amount of cement should be minimized. Generally speaking, the use of large-size aggregates can play such a role. Therefore, at present, dam concrete often adopts four grades, and the maximum aggregate size can reach 15cm. If conventional concrete uses larger aggregates, it is difficult to be restricted by mixing capacity and vibrating capacity during construction. [0003] Rockfill dam is a common type of dam. At present, the common construction process of rolling rockfill dams is: picking materials from the stockyard, using...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B7/02E02D15/04
Inventor 金峰安雪晖
Owner TSINGHUA UNIV
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