Gravel roadbed backfilling construction method
A construction method and subgrade technology, which can be used in foundation structure engineering, roads, excavation, etc., can solve problems such as subgrade settlement easily, and achieve better anti-settling effect, better stability and anti-settling ability.
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[0052] The following is attached Figure 1-2 The application is described in further detail.
[0053] The embodiment of the present application discloses a construction method for backfilling a gravel subgrade.
[0054] refer to figure 1 and figure 2 , a construction method for backfilling a gravel subgrade, comprising the following steps:
[0055] S1. Remove rubbish around the roadbed, and dig a foundation pit 1 on the ground. The side walls on both sides of the length direction of the foundation pit 1 are relatively inclined. The cross-sectional area of the foundation pit 1 gradually increases from top to bottom to ensure that the foundation pit Under the premise that the excavation of foundation pit 1 is smooth, the stability of the bottom of foundation pit 1 is improved;
[0056] S2. Compacting the bottom wall of the foundation pit 1 to a depth of not less than 10 cm, so that the soil at the bottom of the foundation pit 1 is more compact, and preliminary subgrade se...
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