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Curtain grouting construction method

A construction method and curtain grouting technology, applied in the field of dam body repair, can solve problems such as low efficiency and achieve the effect of increasing the grouting speed

Active Publication Date: 2022-07-22
浙江久豪建设科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, in order to fully spread the slurry, the thinner (lower consistency) slurry will be poured in first, and then the thicker (higher consistency) slurry will be poured in, but this method of step-by-step grouting is less efficient

Method used

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  • Curtain grouting construction method

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Embodiment Construction

[0027] This specific embodiment is only an explanation of the present invention, and it does not limit the present invention. Those skilled in the art can make modifications without creative contribution to the present embodiment as needed after reading this specification, but as long as the rights of the present invention are used All claims are protected by patent law.

[0028] 1) Drilling positioning: The drilling position is based on the design layout principle, and the total station combined with the steel ruler can be used for setting out. Drilling hole row spacing: According to the production test situation, detect the slurry diffusion range, and determine the optimal hole row spacing for curtain grouting drilling. Generally, 2-3m should be selected, and it should not be greater than 5m. The hole diameter of the hole is φ110~130mm.

[0029] Since the hole spacing of the curtain grouting hole is small, the vertical axis angle of the drilling rig should be strictly corre...

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Abstract

The invention discloses a curtain grouting construction method. For a grouting hole with a depth of 10-15m, 1) determine the position of the grouting hole, and drill holes along the axis of the dam body to form the grouting hole; 2) put a casing in the grouting hole, and cover the The pipe is placed vertically into the grouting hole and penetrates up and down. The axis of the casing coincides with the axis of the grouting hole. The outer wall of the casing and the inner wall of the grouting hole form a grouting channel 1, and the inner cavity of the casing forms a grouting channel 2; 3) When grouting, the consistency is first The lower slurry is poured in from the first grouting channel and continuously poured in, and then the higher consistency slurry is poured in from the second grouting channel and continues to pour in. At the same time, the casing is continuously raised, and in the process, the grouting channel The grout height of the second is higher than that of the grout channel one. In this scheme, the slurry with lower consistency is poured from the first grouting channel and continuously poured, and then the slurry with higher consistency is poured into the second grouting channel and continuously poured; Fill in, keep in sync, so the grouting speed is greatly improved.

Description

technical field [0001] The invention relates to the field of dam body repair, in particular to a curtain grouting construction method. Background technique [0002] Curtain grouting is a grouting project in which the grout is poured into the cracks and pores of the rock mass or soil layer to form a continuous water-blocking curtain to reduce seepage flow and seepage pressure. [0003] Curtain grouting is a project in which grouting is used to construct an anti-seepage curtain in the rock or sand gravel foundation of a gate dam. The top of the curtain is connected with the concrete gate floor or dam body, and the bottom is deep into the relatively impermeable rock layer to a certain depth to prevent or reduce the infiltration of groundwater in the foundation; together with the drainage system located downstream, it can also reduce the uplift of the seepage water to the gate and dam. pressure. Since the 20th century, curtain grouting has always been the main means of anti-se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/18E02D15/00
CPCE02D19/18E02D15/00
Inventor 李根华
Owner 浙江久豪建设科技有限公司
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