Speaking of concrete precast block slope protection? At this stage, how do construction company personnel carry out concrete precast block slope protection construction? What is the technical status of concrete precast block slope protection? The following is the content related to the professional construction terminology of concrete precast block slope protection edited by Zhongda Consulting. The basic situation is as follows:

The editor made inquiries through the construction industry encyclopedia website - the construction knowledge column of the Construction Network and sorted out the concrete precast block Technical situation related to slope protection technology. In order to facilitate construction company personnel to further understand the relevant content of concrete precast block slope protection, Zhongda Consulting lists the basic situation of concrete precast block slope protection, the content is as follows:

Concrete precast block slope protection construction method

(1) Measurement and setting out

Before backfilling is completed and the dam slope is trimmed, a comprehensive control measurement of the dam slope is first carried out according to the design requirements, and a grid layout with theodolite and level is used for control measurement. , measure the elevation of various structural layers and the control elevation of concrete precast block face protection. During the construction process, check and measure with control points and adjacent level points at any time to ensure the smoothness of the dam slope.

(2) Dam slope surface leveling

During construction, the dam surface shall be leveled according to the controlled elevation, the slope surface shall be smoothed and compacted to achieve the designed slope. . The slope leveling construction is divided into two processes: the first process is slope cutting, which removes humus soil, turf roots and other debris on the dam slope surface, and then manually cuts the slope in sections from top to bottom to make the slope smooth. . The second process is slope compaction, using a tamping machine for slope compaction.

(3) Construction method

1. C15 concrete precast block slope protection

(1) C15 concrete precast block production

Concrete precast The field is arranged in the original designed spillway of the main dam and on the top of the dam after remediation. The precast concrete design number is C15. The concrete blocks are 30cm×30cm regular hexagons and 8cm thick.

①Ground leveling and formwork installation

In order to ensure a smooth bottom surface of the prefabricated blocks, the original spillway prefabricated site must remove surface weeds and soil to expose the original concrete floor before pouring.

The formwork is made of 5mm thick steel plates. The size and strength meet the design requirements. It will not deform during the concrete pouring and tamping process, and the surface of the formwork is smooth and smooth.

②Concrete mixing, transportation, vibration and cleaning

Concrete is mixed manually, carried into the mold manually, leveled manually, and compacted using a 2.2kw flat plate vibrator. The concrete should be initially cleaned before the initial setting, and should be cleaned again after the final setting to ensure that the surface is smooth and flat.

③Concrete precast block curing and form removal

Concrete precast blocks should be covered and cured with wet straw bags 12-18 hours after the completion of pouring. When the concrete strength reaches above 2.5Mpa, the formwork must be removed. The formwork can be dismantled without damaging the surface and corners of the prefabricated blocks. After dismantling the formwork, they should be stacked together and maintained for no less than 14 days.

(2) Installation of C15 concrete prefabricated blocks

①Sand cushion: The sand cushion uses a 3.5t dump truck to transport qualified sand from the sand and gravel yard to the two dams The shoulders and dam top are then manually transported to the working warehouse surface, and the cables are manually laid according to the design drawings and control elevation to ensure that the cushion slope meets the design requirements. It is compacted using a tamping machine.

② Installation of concrete precast blocks: The concrete precast blocks are prefabricated in the precast yard. After their strength reaches the design strength, they are transported to the top of the dam by manual rubber-tyred vehicles, and then manually transported to the working warehouse for manual installation. Install the bricks. The installation sequence is carried out block by block from bottom to top to ensure that the slope after installation meets the design requirements and the joint width meets the specifications.

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