CN103737708B

CN103737708B - The maintenance process of solid square pile

Info

Publication number: CN103737708B
Application number: CN201410004142.5A
Authority: CN
Inventors: 林华锋
Original assignee: QUANZHOU JIANHUA CONCRETE PILE Co Ltd
Current assignee: Quanzhou Jianhua Building Material Co., Ltd.
Priority date: 2014-01-02
Filing date: 2014-01-02
Publication date: 2015-12-09
Anticipated expiration: 2034-01-02
Also published as: CN103737708A

Abstract

The invention provides a kind of maintenance process of solid square pile, comprise first stage steam curing process and second stage steam pressure technique, first stage steam curing process maintenance comprises intensification, constant temperature and cooling three phases; Second stage steam pressure technique comprises boosting, constant voltage, step-down and cooling four-stage.The maintenance process time of the present invention is short, efficiency is high, thus improves the turnover rate of mould, has saved the input of human resources, also can further improve concrete intensity.

Description

The maintenance process of solid square pile

Technical field

The present invention relates to a kind of maintenance process of solid square pile.

Background technology

According to the production code requirement of solid square pile, the intensity of general pile concrete is between C30-C50, because the production of current square pile mainly adopts normal temperature steam curing or natural curing, due to the time of maintenance partially long (natural curing needs more than 28 days) and the turnover rate of mould is on the low side, cause the production output of square pile on the low side, personnel drop into comparatively large, cause the economic benefit of manufacturer poor.Also there is part producer also carrying out HTHP maintenance test in current industry, but due to improper to the control of pressure and temperature, cause solid square pile to there is more contraction fissure and diaclase, do not reach the designing requirement of product.

Summary of the invention

The technical problem to be solved in the present invention, be the maintenance process providing a kind of solid square pile, the time is short, efficiency is high, thus improves the turnover rate of mould, has saved the input of human resources, also can further improve concrete intensity.

The present invention is achieved in that a kind of maintenance process of solid square pile, it is characterized in that: comprise

First stage steam curing process: after the vibrations of solid square pile cloth, square pile is hung in steam-cured pond and carry out preliminary maintenance, preliminary maintenance comprises intensification, constant temperature and cooling three phases; Wherein, the time of temperature rise period is 1.5 ~ 2.0 hours, and programming rate is 15 ~ 20 DEG C/h, and the programming rate of temperature rise period is front slow rear fast; The time in constant temperature stage is 3.0 ~ 3.5 hours, and it is 80 ~ 85 DEG C that temperature controls; The time of temperature-fall period is 0.5 ~ 1.0 hour;

Second stage steam pressure technique: square pile first stage steam curing being terminated the also demoulding proceeds to autoclave and carries out secondary maintenance, comprises boosting, constant voltage, step-down and cooling four-stage; Wherein, the time of boost phase is 1.0 ~ 2.0 hours, and the rate of rise is 0.05 ~ 0.10MPa/ hour, and the rate of rise is front slow rear fast; The time of constant-voltage phase is 2.5 ~ .5 hour, and Stress control is 0.15 ~ 0.20MPa, and temperature controls to be 100 ~ 110 DEG C; The time of buck stage is 1.0 ~ 2.0 hours, and pressure decay rate is 0.05 ~ 0.10MPa/ hour, and pressure decay rate is front slow rear fast; The time of temperature-fall period is 1.0 hours.

Further, in described second stage steam curing process, square pile being proceeded to autoclave is adopt entrucking to enter the mode of still, and sleeper on still car or parallels need keep straight line with the suspension ring position of square pile.

Further, described autoclave domestic demand enters a certain amount of water, and the height of water level is between 20 ~ 35cm.

Further, the inventive method also comprises phase III steam pressure technique: the square pile after second stage steam pressure terminates, and proceeds to stockyard and deposits, and between storage period square pile without the need to watering.。

Further, when described autoclave is multiple, the Yu Shui of arbitrary autoclave and remaining vapour are poured in the contiguous autoclave arranged and carry out secondary utilization.

Tool of the present invention has the following advantages: the present invention is on the steam-cured basis of existing normal temperature, carry out the temperature and time adjustment of normal temperature steam curing conservation, and proceed to autoclave when carrying out autoclave curing, the pressure, temperature, time etc. of steam are adjusted accordingly, make to obtain saving to a great extent the total time of maintenance, thus improve the turnover rate of mould, save the input of human resources, due to production efficiency and the shortening sending out the stake time, significantly reduce the demand to producing and stack place; And owing to have employed normal temperature steam curing and autoclave curing, further increase concrete intensity.

Detailed description of the invention

The maintenance process of solid square pile of the present invention, comprising:

First stage steam curing process: after the vibrations of solid square pile cloth, square pile is hung in steam-cured pond and carry out preliminary maintenance, preliminary maintenance comprises intensification, constant temperature and cooling three phases; Wherein, the time of temperature rise period is 1.5 ~ 2.0 hours, and programming rate is 15 ~ 20 DEG C/h, and the programming rate of temperature rise period is front slow rear fast, in order to avoid too fast owing to heating up, causes concrete to occur a large amount of crack; The time in constant temperature stage is 3.0 ~ 3.5 hours, and it is 80 ~ 85 DEG C that temperature controls; The time of temperature-fall period is 0.5 ~ 1.0 hour;

Second stage steam pressure technique: square pile first stage steam curing being terminated the also demoulding proceeds to autoclave and carries out secondary maintenance, comprises boosting, constant voltage, step-down and cooling four-stage; Wherein, the time of boost phase is 1.0 ~ 2.0 hours, and the rate of rise is 0.05 ~ 0.10MPa/ hour, and the rate of rise is front slow rear fast; The time of constant-voltage phase is 2.5 ~ .5 hour, and Stress control is 0.15 ~ 0.20MPa, and temperature controls to be 100 ~ 110 DEG C; The time of buck stage is 1.0 ~ 2.0 hours, and pressure decay rate is 0.05 ~ 0.10MPa/ hour, and pressure decay rate is front slow rear fast; The time of temperature-fall period is 1.0 hours, and cooling can adopt opens the cooling of still door, just can anchor after cooling.

In described second stage steam curing process, square pile being proceeded to autoclave is adopt entrucking to enter the mode of still, and sleeper on still car or parallels need keep straight line with the suspension ring position of square pile, avoid span excessive, cause bottom square pile to be split by pressure ring.

Described autoclave domestic demand enters a certain amount of water, and the height of water level is between 20 ~ 35cm, to improve the water saturation degree of steam, avoids because the water deficient in steam causes solid square pile in maintenance processes to occur contraction fissure or diaclase.

The inventive method also can comprise phase III steam pressure technique: the square pile after second stage steam pressure terminates, and need place sleeper on request, meanwhile, after solid square pile pile body temperature is down to normal temperature, can sends out stake and carry out injection to building site.For the square pile depositing in stockyard, without the need to watering.

When described autoclave is multiple, the Yu Shui of arbitrary autoclave and remaining vapour are poured in the contiguous autoclave arranged and carry out secondary utilization.Not only be conducive to the maintenance of square pile pile concrete, more can save a large amount of steam resources.

Be below various embodiments of the present invention, wherein concrete steps process is omitted, and the technological parameter of its each step is as follows:

Embodiment 1

Embodiment 2

Embodiment 3

The beneficial effect contrast of each embodiment

Although the foregoing describe the specific embodiment of the present invention; but be familiar with those skilled in the art to be to be understood that; specific embodiment described by us is illustrative; instead of for the restriction to scope of the present invention; those of ordinary skill in the art, in the modification of the equivalence done according to spirit of the present invention and change, should be encompassed in scope that claim of the present invention protects.

Claims

1. a maintenance process for solid square pile, is characterized in that: comprise

First stage steam curing process:

After the vibrations of solid square pile cloth, square pile is hung in steam-cured pond and carry out preliminary maintenance, preliminary maintenance comprises intensification, constant temperature and cooling three phases; Wherein, the time of temperature rise period is 1.5 ~ 2.0 hours, and programming rate is 15 ~ 20 DEG C/h, and the programming rate of temperature rise period is front slow rear fast; The time in constant temperature stage is 3.0 ~ 3.5 hours, and it is 80 ~ 85 DEG C that temperature controls; The time of temperature-fall period is 0.5 ~ 1.0 hour;

Second stage steam pressure technique:

Square pile first stage steam curing being terminated the also demoulding proceeds to autoclave and carries out secondary maintenance, comprises boosting, constant voltage, step-down and cooling four-stage; Wherein, the time of boost phase is 1.0 ~ 2.0 hours, and the rate of rise is 0.05 ~ 0.10MPa/ hour, and the rate of rise is front slow rear fast; The time of constant-voltage phase is 2.5 ~ 3.5 hours, and Stress control is 0.15 ~ 0.20MPa, and temperature controls to be 100 ~ 110 DEG C; The time of buck stage is 1.0 ~ 2.0 hours, and pressure decay rate is 0.05 ~ 0.10MPa/ hour, and pressure decay rate is front slow rear fast; The time of temperature-fall period is 1.0 hours.

2. the maintenance process of solid square pile according to claim 1, it is characterized in that: in described second stage steam curing process, square pile being proceeded to autoclave is adopt entrucking to enter the mode of still, and sleeper on still car or parallels need keep straight line with the suspension ring position of square pile.

3. the maintenance process of solid square pile according to claim 1 and 2, is characterized in that: described autoclave domestic demand enters a certain amount of water, and the height of water level is between 20 ~ 35cm.

4. the maintenance process of solid square pile according to claim 1, is characterized in that: also comprise

Phase III proceed to stockyard stack: the square pile after second stage steam pressure terminates, proceeds to stockyard and deposits, and between storage period square pile without the need to watering.

5. the maintenance process of solid square pile according to claim 1, is characterized in that: when described autoclave is multiple, and the Yu Shui of arbitrary autoclave and remaining vapour are poured in the contiguous autoclave arranged and carry out secondary utilization.