Find a complete pouring scheme of large volume concrete

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Hello <> large-volume concrete pouring method is as follows: 1. Concrete pouring under mud, and pouring concrete in a slot filled with cement slurry with a conduit. 2. Underwater concrete pouring, pouring at the designated position underwater. 3. Concrete pouring of shear wall, and pouring columns and walls with the same concrete strength at the same time.

4. Concrete layered pouring, with comprehensive layering, broken layering, and oblique layering. 5. Cast-in-place concrete, on-site mixing and pouring. Pro-<>

There are two types of pouring schemes for bulk concrete.

The construction of large-volume concrete concrete annihilation engineering should be layered continuous pouring construction or pushing continuous pouring construction. It should be evenly segmented and layered according to the design size.

When the cross-sectional area is less than 200m, the segment should not be greater than 2 sections; When the cross-sectional area is less than 300m, the segment should not be greater than 3 sections, and the area of each section shall not be less than 50m. The thickness of each section of concrete should be . The vertical construction joints between the sections should be parallel to the direction of the smaller section size of the structure.

The large-volume concrete pouring scheme is divided into comprehensive layering, segmented layering, and inclined plane layering.

1. Comprehensive layering, when pouring, it needs to start from the short side and advance to the long side.

2. Segmented layering, the construction plane is divided into several sections, the thickness is divided into several layers, and then pouring from the bottom.

3. Inclined plane layering, this method is used in the case of the overall structure ratio length is more than three times, and the construction is carried out from bottom to top.

Before carrying out concrete construction, Wu Kuan should not be too anxious, and need to have a certain understanding of the drawings of concrete construction, and clarify the number of concrete used, as well as the amount that needs to be used, and then start construction after everything is ready.

There are many types of concrete, and the corresponding construction conditions are subject to a certain difference, so it is necessary to confirm it in advance. In addition, it is also necessary to check the steel bars, formwork, and support equipment needed for the leakage of the construction cavity to see if they are qualified and can meet the needs of later use.

Constituent materials and structures

Ordinary concrete is a kind of artificial stone made by hardening cement, coarse aggregate (crushed stone or pebbles), fine aggregate (sand), admixtures and water. Sand and stone play a skeleton role in concrete.

Inhibits the shrinkage of cement; Cement and water form a cement slurry that wraps around the surface of the coarse and fine aggregates and fills the voids between the aggregates. The cement slurry plays a lubricating role before hardening, so that the concrete mixture has good working properties, and after hardening, the aggregate is cemented together to form a strong whole.

Answer]: a, b, c

2021 New Textbook P57

When pouring large-volume concrete, in order to ensure the integrity of the structure and the continuity of construction, when layered pouring is adopted, it should. Ensure that the upper layer of concrete is poured before the initial setting of the lower layer of concrete. According to the overall requirements, the structure is large, the structure is small, the steel bar is dense and the concrete is **, etc., you can choose one of the methods of comprehensive layering, segmented layering, and inclined plane layering.

Answer]: a, b, c

According to the overall requirements, the size of the structure, the sparse reinforcement and the concrete **, etc., the large-volume concrete pouring Changzheng scheme can be selected in three ways: comprehensive layering, segmented layering, and inclined plane layering.

Answer]: a, b, c

Analysis] For candidates with similar engineering practices, this question is simple, mainly assessing the knowledge points of large-volume concrete pouring methods.

When pouring large-volume concrete, in order to ensure the integrity of the structure and the continuity of construction, when using layered pouring to guess the branches, it should be ensured that the upper ear loss layer of concrete is poured before the initial setting of the lower concrete. According to the overall requirements, the size of the structure, the density of the reinforcement and the partner concrete, the pouring scheme can choose one of the methods of comprehensive layering, segmented layering, and inclined plane layering.

Therefore, the correct option for this question should be "ABC".

Answer]: a, b, c

A, B, C analysis: For candidates with similar engineering practices of key wheels, this question is simple, mainly to assess the knowledge points of large-volume concrete pouring methods.

When pouring large-volume concrete, in order to ensure the integrity of the structure and the continuity of construction, when layered pouring is adopted, it should be ensured that the upper concrete is poured before the initial setting of the lower concrete. According to the overall requirements, the size of the structure, the density of the reinforcement and the concrete, etc., the pouring scheme can choose one of the methods of comprehensive layering, segmented layering, and inclined plane layering.

Therefore, the correct option for this question should be "ABC".