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Drill hole prepacked aggregate concrete construction method

A construction method and concrete technology, applied in basic structure engineering, basic structure testing, construction, etc., can solve problems such as increasing construction difficulty, increasing construction cost, wasting manpower and material resources, and achieving shortened construction period, effective construction cost, and construction. easy effect

Active Publication Date: 2014-11-12
HANGZHOU HUANENG SAFETY ENG POLYTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing drilling and raising concrete construction requires crushed stones to mix the concrete, which not only wastes manpower and material resources to transport the crushed stones, but also increases the difficulty of construction and increases the construction cost

Method used

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  • Drill hole prepacked aggregate concrete construction method
  • Drill hole prepacked aggregate concrete construction method
  • Drill hole prepacked aggregate concrete construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110]The parameters of the mass parts of each component of the slurry are selected as follows: 35 mass parts of water, 75 mass parts of cement, 60 mass parts of admixtures, and 10 mass parts of admixtures; after the above-mentioned test items are tested, the following data are obtained:

[0111]

[0112] The various indexes of embodiment 1 are all within the required indexes, meet the requirements of this construction method, and can be put into use.

Embodiment 2

[0114] The mass parts parameters of each component of the slurry are selected as follows: water mass parts are 35, cement mass parts are 80, admixtures are 65 mass parts, admixtures are 15 mass parts; after the above test items are tested, the following data are obtained:

[0115]

[0116] Part of the indicators in Example 2 are all within the required indicators. Due to the large amount of cement, the mixing time exceeds the required indicators, and the fluidity of the raised slurry also exceeds the required indicators, which does not meet the requirements of this construction method. It is necessary to adjust the components before it can be put into use. .

Embodiment 3

[0118] The parameters of the mass parts of each component of the slurry are selected as follows: 35 parts by mass of water, 70 parts by mass of cement, 65 parts by mass of admixtures, and 15 parts by mass of admixtures; after the above-mentioned test items, the following data are obtained:

[0119]

[0120] Part of the indicators in Example 3 are all within the required indicators. Due to the large amount of water, the density of the slurry is lower than the required indicators, and the strength of the slurry is also lower than the required indicators. It does not meet the requirements of this construction method. It is necessary to adjust the components before putting in use.

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Abstract

The invention discloses a drill hole prepacked aggregate concrete construction method. The method comprises the steps of (a) construction preparation, (b) reconnaissance and hole forming, (c) prepacked aggregate concrete testing, (d) preparation conducted before hole drilling, (e) hole drilling, (f) hole drilling cleaning, (g) pressurized-water testing conducted before prepacked aggregate concrete construction, (h) mortar production station building, (i) mortar production, (j) prepacked aggregate concrete hole prepacked aggregate concrete construction and (k) hole sealing. A reserved prepacked aggregate concrete hole is preformed, a prepacked aggregate concrete pipe is inserted into the prepacked aggregate concrete hole and connected with a mortar injection pipe, the mortar injection pipe enables prepacked aggregate concrete liquid to be directly injected into the prepacked aggregate concrete hole, and then pressure grouting construction is carried out continuously and uninterruptedly. Stone blocks do not need to be crushed to stir concrete. The prepacked aggregate concrete liquid slowly rises from the prepacked aggregate concrete hole in a template, so that water in coarse aggregate gaps can be completely changed into the prepacked aggregate concrete liquid during underwater construction, and concrete with high quality can be easily made. No stirring machines are needed for aggregate stirring, and the construction progress can be easily accelerated. Only cement mortar needs to be pumped during pumping, and the pumping technology is improved compared with common concrete.

Description

technical field [0001] The invention relates to a construction method for drilling and raising concrete. Background technique [0002] Construction of cofferdams and foundation pits is an important part of dock construction. The cost of cofferdam construction generally accounts for 15% to 20% of the total investment. The technical difficulty is high, the risk is high, and the construction period is also long. It is related to the success, quality and construction period of the project. Its design and construction have always been a hot spot in the industry. [0003] In recent years, when building dock projects on water in rocky areas, it is generally preferred to use prefabricated reinforced concrete caissons as the main structure of the cofferdam. Water-stop construction technologies such as underwater grout raising technology and underwater high-pressure rotary spraying have greatly reduced the cost of temporary cofferdam engineering, and provided the possibility for the ...

Claims

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Application Information

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IPC IPC(8): E02D15/02E02D15/04E02D33/00
Inventor 华勤建彭伟刘学应
Owner HANGZHOU HUANENG SAFETY ENG POLYTRON TECH CO LTD
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