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Construction method of large-volume concrete bearing platform with one-time pouring in winter

A large-volume concrete and construction method technology, which is applied in the direction of construction, building structure, and building material processing, can solve the problems of large concrete temperature gradient, reduce the service life of the structure, and affect the safety of the structure, and achieve good temperature difference control effect. The effect of good quality and low investment cost

Active Publication Date: 2010-07-21
CHINA RAILWAY 20 BUREAU GRP +3
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Problems solved by technology

Because the external temperature of mass concrete is very low during winter construction, while the internal temperature of the concrete is very high, the temperature gradient between the inside and outside of the concrete leads to a large temperature gradient in the concrete, which can easily cause temperature cracks, affect the safety of the structure, and reduce the service life of the structure

Method used

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  • Construction method of large-volume concrete bearing platform with one-time pouring in winter
  • Construction method of large-volume concrete bearing platform with one-time pouring in winter
  • Construction method of large-volume concrete bearing platform with one-time pouring in winter

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Embodiment Construction

[0044] Such as figure 1 A one-time pouring construction method for large-volume concrete caps in winter includes the following steps:

[0045] Step 1. Binding of reinforcement cages: according to the designed structure and size of the large-volume concrete cap 4 to be formed, the reinforcement cage for forming the large-volume concrete cap 4 is bound on the construction platform.

[0046] Step 2. Arrangement of cooling water pipes and temperature measuring elements: After the reinforcement cage is bound or during the binding process, a multi-layer circulating cooling water pipe 1 is horizontally laid out in layers inside the steel cage, and the inlet of the circulating cooling water pipe 1 The water inlet and the water outlet are led out from the top of the steel cage through the water inlet pipe 2 and the water discharge pipe 3 respectively, and then lead into the sump respectively. The deployed temperature measuring elements include a temperature measuring element 5-1 for r...

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Abstract

The invention discloses a construction method of a large-volume concrete bearing platform with one-time pouring in winter, comprising the following steps of: step 1, binding steel reinforcement cages; step 2, laying cooling water pipelines and temperature measuring elements; step 3, constructing formed templates, wherein the construction process comprises delimiting template lines and constructing formed brick dies; step 4, pouring concrete; and step 5, conserving and finishing surface: finishing surface in time when completing the pouring of the concrete, carrying out the surface finishing twice, carrying out the first surface finishing when pouring the concrete to the top, carrying out the second surface finishing when the concrete is initially congealed, and adopting a mode that external stores water for conserving when the concrete is initially congealed. The invention has the advantages of reasonable design, simple construction method step, convenient operation, short construction period, one-time pouring molding and strong maneuverability, the large-volume concrete bearing platform constructed for molding in winter has good quality, the poured concrete is not frozen, and the surface of the bearing platform can not have temperature cracks.

Description

technical field [0001] The invention belongs to the technical field of large-volume concrete pouring construction in winter, and in particular relates to a one-time pouring construction method for large-volume concrete caps in winter. Background technique [0002] Daijiawan Weihe Bridge in Baoji City is 1146 meters long, and the span combination: 10×20 meters (hollow slab girder) + 127 meters (cable-stayed bridge) + 16×32 meters (large hole slab beam) + 127 meters ( Cable-stayed bridge) + 9×20 meters (hollow slab girder), the main bridge is a cable-stayed structure with a single tower and no back cables. There are two bridges in total, crossing the Xibao Expressway and the planned Binhe Road respectively. The total length of the cable-stayed bridge is 127 meters, the specific span layout is 32+75+20 meters, the main tower is 63 meters long above the bridge deck, and 10.425 meters below the bridge deck. The beam is 28 meters wide, and 9 fan-shaped stay cables are installed t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/02
Inventor 武群虎韩建红陈磊赵来义郑峰
Owner CHINA RAILWAY 20 BUREAU GRP
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