Concrete precast beam winter heat preservation construction method
A construction method and concrete technology, which is applied in the direction of manufacturing tools, pretreatment control, clay preparation equipment, etc., can solve problems that have not been found, and achieve the effects of ensuring construction progress, avoiding manual long-term operation, and steam balance
Inactive Publication Date: 2021-06-22
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
View PDF10 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In the beam body prefabrication process construction of the existing small-scale project, the technology of using the hot gas boiler to heat the mixing water in the mixing station and using the steam boiler to heat the beam body has not been found
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The present invention is described in further detail below by embodiment, and embodiment is only used for illustrating the present invention, does not limit the scope of the present invention.
[0025] Project Overview:
[0026] Sichuan Shuangjiangkou Hydropower Station is located in Malkang County and Jinchuan County, Sichuan Province, with an altitude of more than 2300m. It is winter from late October to early March of the following year. During this period, the lowest temperature during concrete pouring reaches above -15°C, and the temperature difference between day and night is large.
[0027] Shuangjiangkou 2# Diversion Tunnel Keryingou 2# Bridge has a total length of about 117m and is designed to consist of 8 pieces of 35m long T-shaped prestressed beams and 16 pieces of 16m hollow slab beams. Among them, the T-shaped beam is 2.5m high, the bottom of the beam body is 0.5m wide, the top of the wing plate is prefabricated with a wide width of 2m, 25m of wet joints a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| Diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the field of roads and bridges, and particularly relates to a concrete precast beam winter heat preservation construction method. The method comprises the steps of installing a hot water boiler in a mixing station and installing a steam boiler in a precast yard, and achieves the following technical effects that (1), the hot water boiler and the steam boiler both adopt an automatic control system, so that long-term manual operation is avoided; (2) the water temperature for mixing the concrete is always between 10 DEG C and 20 DEG C, and the temperature of the mixed concrete is between 10 DEG C and 15 DEG C, so that the mixing requirement of concrete production is met; (3) holes which are densely distributed at intervals are formed in a steam pipeline for a precast beam body of a beam yard, steam in the beam body is balanced, the temperature is appropriate, the temperature of thermometers arranged at different parts of the poured beam body is detected, the heat preservation temperature of the beam body is between 18 DEG C and 25 DEG C, the concrete construction requirement is met, the humidity index is the same as that of a standard curing room, and the concrete sampling test block 7 d and 28 d strength meets the standard requirement; and (4), heat preservation and moisture preservation maintenance is conducted through waterproof two-cloth and one-membrane geotextile and a canvas tent, and certain turnover performance is achieved.
Description
technical field [0001] The invention belongs to the field of roads and bridges, and in particular relates to a winter heat preservation construction method for concrete prefabricated beams. Background technique [0002] Bridges are very common in many projects. Conventional prefabrication is carried out at a time when the temperature is more suitable. Large-scale projects are equipped with systematic temperature control facilities. [0003] In the beam body prefabrication process construction of the existing small-scale project, the technology of using the hot gas boiler to heat the mixing water in the mixing station and using the steam boiler to heat the beam body has not been found. [0004] The invention has certain reference significance for the prefabrication of concrete beams in winter under the condition that the total amount of beams is small and no systematic thermal insulation facilities are arranged on site. Contents of the invention [0005] In order to solve ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): B28C7/00B28C7/12B28B11/24F22B33/18
CPCB28C7/003B28C7/12B28B11/245F22B33/18
Inventor 陈雪湘曹小杰朱晓峰
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD