A pile hole construction method for underground engineering

A construction method and underground engineering technology, which is applied to earth drilling, mining equipment, tunnels, etc., can solve the problems of violating the scientific development concept, poor adaptability, unreasonableness, etc., and achieve clear structural force path, fast construction, and high quality reliable effect

Active Publication Date: 2016-04-06
JINAN RAILWAY TRANSPORT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If regional differences are not taken into consideration and the almost solidified construction method is blindly adopted, problems such as poor adaptability, uneconomical, and unreasonableness will inevitably exist, and it will also violate the guiding ideology of the scientific outlook on development

Method used

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  • A pile hole construction method for underground engineering
  • A pile hole construction method for underground engineering
  • A pile hole construction method for underground engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] combine Figure 2 to Figure 10 , the construction steps are introduced as follows:

[0055] Step 1: Drill holes on the road surface, mechanically drive or press prefabricated piles to the design elevation, to ensure the compaction effect of the piles, reserve a long hole in the middle of the prefabricated piles, the hole diameter is 10cm, and place positioning rods with grouting function, prefabricated During the process of driving or pressing the pile, the positioning rod controls the accuracy of the pile. See the cross-sectional schematic diagram and corresponding section Figure 2-Figure 4 As shown; the prefabricated piles are provided with two-way corbels at the level of the arch and the floor;

[0056] Step 2: Carry out grouting at the bottom of the pile, fill the borehole with plain concrete, and repair the road surface. See the cross-sectional schematic diagram Figure 5 shown;

[0057] Step 3: Construct the shaft on the side of the road, construct the cross p...

Embodiment 2

[0064] Among them, the excavation height of the soil body of the upper step is 2m, and the prefabricated dome is pushed up, and the other schemes are the same as in Embodiment 1.

Embodiment 3

[0066] Among them, the diameter of the anchor rod and the micro-pile is 15cm, and the angle between the anchor rod and the horizontal line is 5 degrees and it is obliquely downward. The cross-sectional schematic diagram is shown in Figure 8 Shown; Other schemes are with embodiment 1.

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Abstract

The invention belongs to the technical field of underground construction engineering, and specifically relates to a construction method for applying an industrialization model to underground engineering, which is suitable for urban arterial road areas above the groundwater level, and has the advantages of no impact on traffic, reliable quality, fast construction, safety and economy, It has the advantages of energy saving and environmental protection, and can realize industrialized production. The construction steps are: drilling holes on the road surface, mechanically driving or pressing prefabricated piles to the design elevation to ensure the pile compaction effect; grouting at the bottom of the piles, filling the drilled holes with plain concrete, and repairing the road surface; constructing shafts on the side of the road, excavating From the cross passage to the interval tunnel, assemble or push the dome, and carry out the pipe shed support; excavate the soil body of the upper step of the pile hole under the pipe shed or the dome, and construct the side wall anchor shotcrete support; excavate the lower step soil of the pile hole Body, construction of side wall anchor spray support, micro-pile at the bottom; construction of side wall and bottom plate waterproof, to ensure effective lap joint of waterproof, assemble bottom plate and side wall.

Description

technical field [0001] The invention belongs to the technical field of underground construction engineering, and in particular relates to a construction method for applying an industrialization model to underground engineering, which is suitable for long-distance, small-span, shallow-buried and deep urban interval tunnel projects above the groundwater level. Background technique [0002] The current construction methods for underground structures include open-cut method, reverse method, shallow-buried underground excavation method, and shield method. The shield method or shallow-buried underground excavation method is generally used for interval tunnels. Among them, the shield tunneling method is suitable for medium-soft soil layers and interval tunnels with large buried depths. Shield segments are used for support, which has the disadvantages of high cost, long preparation time, shield wells affecting road traffic, and low section utilization. and other defects. The shallo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00
CPCE21D9/00
Inventor 王国富
Owner JINAN RAILWAY TRANSPORT GRP CO LTD
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