Wall protection method in construction of bored piles of bridges in highway engineering

A technology of bored piles and construction, which is applied in the direction of drilling equipment and methods, infrastructure engineering, drilling equipment, etc. It can solve the problems of delaying the construction progress and not allowing the drilling speed to be too fast, so as to save the amount of consumption and reduce the number of boreholes. Bottom sediment thickness, effect of reducing resistance

Active Publication Date: 2019-05-24
包头市公路工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rapid drilling of rotary drilling, the selection of mud and its performance indicators are particularly important in the hole forming process; and the requirements for the operator of the rotary drilling rig are relatively high, the drilling speed should not be too fast, the drilling speed should be uniform, and the hole collapse Phenomena occur from time to time, greatly delaying the construction progress

Method used

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  • Wall protection method in construction of bored piles of bridges in highway engineering
  • Wall protection method in construction of bored piles of bridges in highway engineering
  • Wall protection method in construction of bored piles of bridges in highway engineering

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The wall protection method in the construction of bored piles for highway engineering bridges includes the following steps:

[0036] (1) Set up a mud pool near the borehole, inject clean water into the mud pool, and add wall protection mud powder into the mud pool together with the clean water, and install a mud circulation pump next to the mud pool.

[0037] The wall retaining mud powder is composed of drilling cuttings adsorbent, sand fixing agent, wall protecting agent, penetrating agent and plugging agent. The mass ratio of leakage agent is 1:0.6:0.4:0.2:0.5. The drill cuttings adsorbent is fatty alcohol polyoxyethylene ether sodium sulfate RO-(CH2 CH 2 O) 2 -SO 3 Na, R is dodecyl. The preparation method of the sand-fixing agent is as follows: disperse hydroxypropyl methylcellulose and starch in water, then add sodium dodecylbenzenesulfonate, heat and stir at 65°C; then add N,N-methylenebispropylene Amide and ammonium persulfate, heat and stir at 65°C; finally ...

Embodiment 2

[0047] The wall protection method in the construction of bored piles for highway engineering bridges includes the following steps:

[0048] (1) Set up a mud pool near the borehole, inject clean water into the mud pool, and add wall protection mud powder into the mud pool together with the clean water, and install a mud circulation pump next to the mud pool.

[0049] Composed of drilling cuttings adsorbent, sand fixing agent, wall protecting agent, penetrating agent and lost circulation agent, the mass of the drilling cuttings adsorbent, sand fixing agent, wall protecting agent, penetrating agent and the lost circulation agent The ratio is 1:0.8:0.3:0.3:0.6. The drill cuttings adsorbent is fatty alcohol polyoxyethylene ether sodium sulfate RO-(CH 2 CH 2 O) 3 -SO 3 Na, R is pentadecyl. The preparation method of the sand-fixing agent is as follows: disperse hydroxypropyl methylcellulose and starch in water, then add sodium dodecylbenzenesulfonate, heat and stir at 70°C; then...

Embodiment 3

[0059] The wall protection method in the construction of bored piles for highway engineering bridges includes the following steps:

[0060] (1) Set up a mud pool near the borehole, inject clean water into the mud pool, and add wall protection mud powder into the mud pool together with the clean water, and install a mud circulation pump next to the mud pool.

[0061] Composed of drilling cuttings adsorbent, sand fixing agent, wall protecting agent, penetrating agent and lost circulation agent, the mass of the drilling cuttings adsorbent, sand fixing agent, wall protecting agent, penetrating agent and the lost circulation agent The ratio is 1:0.5:0.5:0.15:0.8. The drill cuttings adsorbent is fatty alcohol polyoxyethylene ether sodium sulfate RO-(CH 2 CH 2 O) 2 -SO 3 Na, R is n-tetradecyl. The preparation method of the sand-fixing agent is as follows: disperse hydroxypropyl methylcellulose and starch in water, then add sodium dodecylbenzenesulfonate, heat and stir at 60°C; t...

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Abstract

The invention discloses a wall protection method in construction of bored piles of bridges in highway engineering. The method includes the steps of (1) placing a mud pool near a borehole, injecting clean water into the mud pool, adding wall protection mud powder into the mud pool along with the clean water, and installing a mud circulation pump beside the mud pool; (2) burying a protection barrelwith an inner diameter of 20-40 cm larger than that of a bored pile and a height of 30-50 cm higher than that of the ground, and the buried depth of protection barrel is 150-200 cm; (3) applying a rotary drilling rig for hole drilling construction, applying the mud circulating pump for mud circulation, meanwhile filtering the mud; (4) injecting clean water to replace mud for cleaning the hole. A secondary hole clearing after hole formation is unnecessary in the wall protection method, and concrete is directly poured, thereby greatly improving the speed of pile formation and improving the working efficiency by 30%. The mud can be reused to save cost, the cost can be saved by 50% or more than 50% per meter comparing with the traditional wall protection method of traditional red clay or bentonite.

Description

technical field [0001] The invention relates to the technical field of road construction. Specifically, it is the retaining method in the construction of bored piles for highway engineering bridges. Background technique [0002] The Yangshuba-Mingdeng section of Provincial Highway 311 is a first-class highway in Baotou City. The pile foundations of large, medium and small bridges along the line are designed as bored cast-in-situ piles, and the pile foundation type is friction piles. The diameters of the pile foundations along the whole line are 1.2m and 1.5m, and the geological conditions are mostly weathered argillaceous sandstone with sand layers, which are not easy to fix, which brings great difficulties to the wall protection construction of bored piles. [0003] As a new type of basic engineering machinery, rotary drilling rigs have been widely used in pile foundation projects such as roads, railways, bridges, water conservancy projects, and urban construction projects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/08E21B7/00E21B21/00E21B21/06
Inventor 杜成龙庞宏韩宇英陈海萍赵俊利王旭刘建军任明亮
Owner 包头市公路工程股份有限公司
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