Pre-splitting blasting construction method for shield tunneling in upper soft and lower hard strata

The invention discloses a pre-splitting blasting construction method for shield tunneling in upper soft and lower hard strata. The pre-splitting blasting construction method for shield tunneling in the upper soft and lower hard strata comprises the following steps that according to a determined blasting area, pre-splitting blasting hole arrangement is carried out, specifically, hole arrangement forms of blasting holes, auxiliary holes and shock absorption holes are included, and drilling construction is carried out after the hole arrangement is qualified through acceptance; after the drillingis completed, the explosive quantity calculation and charge processing are carried out, then a charge structure is determined and the initiation network is designed; anti-floating counterweight of explosive, charge emplacement and protection are carried out, then initiation is carried out, and the blasting effect is tested after completion of blasting; after the blasting construction is completed,the remaining holes are s