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Displacement sensor mounting method suitable for high rockfill embankment slope

A displacement sensor and installation method technology, applied in the direction of instruments, measuring devices, etc., can solve problems such as difficult construction, offset of displacement sensor installation position, slumping, etc., so as to reduce the difficulty of drilling construction, reduce the risk of damage, and improve Effect of Buried Hole Accuracy

Inactive Publication Date: 2021-07-02
THE SECOND ENG COMPANY OF CCCC FOURTH HARBOR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The slope monitoring system mainly includes the monitoring of the horizontal displacement and vertical displacement of the slope. At present, there are two main methods for installing the displacement sensor. One is to directly use a drilling machine to drill holes in the slope position after the overall construction of the embankment is completed, and then Installing displacement sensors, due to the large filler particles on the side slope of the rock-filled embankment, direct drilling is likely to cause landslides and affect the overall stability of the embankment slope, and the construction of direct drilling is difficult; Embedded, and then carry out embankment construction, and protect the pre-embedded displacement sensors during the construction process. This method is likely to cause the installation position of the displacement sensors to shift or even be destroyed during the embankment compaction construction process, affecting data collection.

Method used

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  • Displacement sensor mounting method suitable for high rockfill embankment slope

Examples

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Effect test

Embodiment 1

[0028] This embodiment provides a displacement sensor installation method suitable for high rock-filled embankment slopes, and the applicable high rock-filled embankment slope 4 is a secondary slope structure. The slope ratio of the first level slope is 1:1.75, and the slope ratio of the second level slope is 1:1.5. And implement the following steps:

[0029] Step 1: Excavating a bottom horizontal groove 7 at the junction of the road shoulder 3 and the side slope 4, the depth of the groove 7 is 80-120cm, the width along the driving direction is 100-150cm, and the length along the embankment 8 is 100-150cm. And drill vertical buried hole 5 at the bottom surface of groove 7, its diameter is 10-12cm, and its depth is 600-900cm.

[0030] Step 2: Use the PVC rubber tube as the inner hose 1, insert the displacement sensor 6 into the inner hose 1 and insert it into the buried hole 5 as a whole. And make the top of the displacement sensor 6 and the inner hose 1 higher than the burie...

Embodiment 2

[0035] In this embodiment, on the basis of Embodiment 1, the construction method is further optimized in combination with the construction environment of the high rock-filled embankment.

[0036] The backfilled stone 2 is crushed stone particles. When the particle size of crushed stone is too large, it cannot be compacted effectively after backfilling, and it is prone to collapse during subsequent use. If the particle size of the crushed stone is too small, the stone material 2 will leak from the gap and be easily lost after being washed by rainwater, resulting in the instability of the embankment slope 4 .

[0037] In order to prevent the particle size or proportion of the stone 2 from affecting the overall structural strength of the embankment 8, in one embodiment, the maximum particle size of the stone 2 should be less than or equal to 400mm, the minimum particle size should be greater than or equal to 150mm, and the particle size should be within the range of 200-400mm Th...

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Abstract

The invention discloses a displacement sensor mounting method suitable for a high rockfill embankment slope. An inner hose sleeved outside a displacement sensor is included. The method further comprises the steps of digging a groove with a horizontal bottom surface at the joint of a road shoulder and the slope, and drilling a vertical buried hole in the bottom surface of the groove; plugging the displacement sensor into the inner hose and inserting the inner hose into the buried hole, so that the top ends of the displacement sensor and the inner hose are higher than the buried hole; filling fine sand along a gap between the inner hose and the inner wall of the buried hole to form a fine sand layer; and backfilling stone is in the groove, and wrapping and tamping the top end of the inner hose. According to the method, the horizontal construction plane is established by digging the groove, and then the buried hole is drilled, so that collapse of the embankment filler is avoided, the drilling construction difficulty is reduced, and the hole burying precision is improved. The displacement sensor is arranged in the inner hose and is inserted into the buried hole, so that the displacement sensor can be kept in a vertical state during initial installation, and the initial error is reduced. The inner hose protects the displacement sensor, and the damage risk of the displacement sensor is reduced.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a method for installing a displacement sensor suitable for the side slope of a high stone-filled embankment. Background technique [0002] High rock-filled embankment is a common structural form in the construction of mountainous expressways. Due to the complex geological conditions of the mountain within the engineering scope, geological survey data cannot fully reveal the engineering geological conditions of the site. In order to ensure the safety of the high rock-filled embankment slope, During the construction period, a slope monitoring system is often established to achieve the purpose of information-based construction and dynamic design. [0003] The slope monitoring system mainly includes the monitoring of the horizontal displacement and vertical displacement of the slope. At present, there are two main methods for installing the displacement sensor. One is to d...

Claims

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Application Information

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IPC IPC(8): G01B21/02
CPCG01B21/02
Inventor 钟少杰李盛郜梦棵麦研刘玉龙梁满坤李洪斌梁建赞
Owner THE SECOND ENG COMPANY OF CCCC FOURTH HARBOR ENG