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A kind of grouting device and grouting method for floating pebble gravel stratum

A technology of gravel and floating eggs, applied in the field of curtain grouting, which can solve the problems of difficult formation of curtains, waste of materials, and reduced efficiency of construction equipment, and achieve the effects of meeting anti-seepage requirements, improving grouting efficiency, and saving grouting volume

Active Publication Date: 2018-07-06
CHINA WATER RESOURCES PEARL RIVER PLANNING SURVERYING & DESIGNING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to form the curtain in the vertical seepage direction required by the design, and at the same time, the use efficiency of construction equipment is reduced and materials are wasted

Method used

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  • A kind of grouting device and grouting method for floating pebble gravel stratum
  • A kind of grouting device and grouting method for floating pebble gravel stratum
  • A kind of grouting device and grouting method for floating pebble gravel stratum

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a grouting device for floating gravel formations in this embodiment includes an outer tube 2, an outer tube sealing device 1, an inner tube 5 placed inside the outer tube 2, and an inner tube sealing device 6. The inner pipe 5 is provided with two groups of inner pipe sealing devices 6, and the pipe section between the two groups of inner pipe sealing devices 6 is the inner pipe slurry outlet section, and the inner pipe slurry outlet 7 is distributed on the inner pipe slurry outlet section. The outer tube 2 is provided with a plurality of directional opening groups along its axial direction, and the distance between two adjacent directional opening groups along the axial direction of the outer tube 2 is 30-40 cm,

[0042] Such as figure 2 As shown, each directional opening group includes 3 pairs of directional openings 3 distributed around the same outer tube 2, a total of 6 directional openings 3, and each pair of directional openings 3 is ...

Embodiment 2

[0054] This embodiment is a kind of grouting method that is used for floating pebble gravel stratum, adopts the grouting device described in embodiment 1 to carry out grouting, as Figure 6-7 As shown, it is a schematic diagram of the application of the grouting method in this embodiment to the curtain lapping anti-seepage of the embankment 17. The embankment 17 is perpendicular to the river, and the seepage direction 14 of the flowing water 16 in the floating pebble gravel formation of the embankment 17 is perpendicular to the embankment 17 at the same time. Lap direction 15 with curtain.

[0055] The grouting method includes a tube lowering step and a curtain overlapping step. In the tube lowering step, when the outer tube is put into the drilled hole, the basic radial direction 12 is parallel to the curtain pre-lapping direction 15 .

[0056] The curtain lapping is divided into two steps:

[0057] Step 1: Drill a sequence of holes at intervals along the curtain lap direct...

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Abstract

The invention relates to the technical field of curtain grouting, in particular to a grouting device for gravel-cobble strata. The grouting device comprises outer pipes, outer pipe sealing devices, inner pipes and inner pipe sealing devices, wherein the inner pipes and the inner pipe sealing devices are arranged inside the outer pipes, and each inner pipe is provided with two inner pipe sealing devices; the pipe section located between every two inner pipe sealing devices is an inner pipe grout outlet section, and each inner pipe grout outlet section is provided with inner pipe grout outlets. The grouting device is characterized in that a plurality of orientated opening sets are formed in the wall of each outer pipe in the axial direction of each outer pipe and respectively comprise at least one pair of orientated openings formed in the periphery of one outer pipe, the radial direction of the periphery of any one outer pipe is adopted as the basis radial direction, and all the orientated openings are formed within the range of 0-45 degrees of the basis radial direction. According to the grouting device, the diffusion direction of grout is controllable, the grouting amount is reduced, the grouting efficiency is improved, and the reliability of curtain lap joint is improved. The invention further relates to a grouting method adopting the grouting device. Curtains perpendicular to the seepage direction can be easily formed through the grouting method.

Description

technical field [0001] The invention relates to the technical field of curtain grouting, in particular to a grouting device and a grouting method for floating pebble gravel formations. Background technique [0002] Regardless of whether it is used as the foundation of the dam or the foundation of the construction cofferdam, the sand and pebble stratum must be treated with anti-seepage treatment to meet the requirements of seepage stability of the building. The result usually required by the project is that after the anti-seepage treatment is effectively overlapped in the axial direction of the building Seepage-proof walls or curtains. [0003] The floating pebble formation is a special kind of sandy pebble formation, which is formed by mountain rivers. It not only has the characteristics of strong water permeability of general sandy pebble formations, but also has a wide range of particle diameters: the large particles are floating pebble gravel (diameter 20cm ~ 100cm) , Sm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/04
CPCE02D15/04
Inventor 韩羽王盟李宁新凌耀忠王自新李光勤李兴印
Owner CHINA WATER RESOURCES PEARL RIVER PLANNING SURVERYING & DESIGNING
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