Airflow-enhanced embankment ventilation structure, composite embankment structure, and construction method thereof

An airflow-enhanced embankment ventilation structure, comprising:

• a ventilation slab, arranged in an embankment and comprising more than one airflow-enhanced ventilation hole, wherein the airflow-enhanced ventilation hole comprises a ventilation hole body arranged in a first direction, a diameter of the ventilation hole body decreases in a designated direction, and the designated direction is a direction from a prevailing wind direction side to a weak wind side of the embankment;
• and
• a negative pressure air suction device, arranged on the weak wind side of the embankment and communicating with the ventilation hole body;
• wherein the ventilation hole body comprises a horn end, a first acceleration section, a first smooth section and a second acceleration section arranged in sequence in the designated direction;
• the first acceleration section and the second acceleration section are of unequal wall thicknesses, the first smooth section is of an equal wall thickness, and a minimum caliber of the first acceleration section is same as a caliber of the first smooth section;
• and
• the horn end of the ventilation hole body and the negative pressure air suction device are exposed from the prevailing wind direction side and the weak wind side of the embankment, respectively.