Check the relevant survey data of the center line position, triangular datum point and horizontal datum point of the bridge and culvert provided by the pile bridge and the construction unit. If the number of piles is insufficient, the position is improper, the position moves or the accuracy does not meet the requirements, it must be supplemented and strengthened. And notify the construction unit of the inspection results.

Auxiliary bridges and culverts and midline piles required for construction. Determine the position of wharf, centerline and foundation pile.

Determine the position of bridge and culvert, the slope of wing wall, diversion wall and diversion building. Supplementary horizontal points required for construction.

During construction, measure and check the position and elevation of the construction site. Other construction survey and lofting positioning.

Extended data

Foundation pit excavation:

According to the construction period, equipment conditions, site environment and geological conditions, mechanical excavation or manual excavation can be used for foundation pit excavation, but no matter which method is adopted, the foundation should avoid overbreak, and the overbreak part should be dug or loosened. Clear it.

No pit shall be exposed, disturbed or soaked for a long time after being dug to a certain height, thus damaging its bearing capacity. In general, when digging a foundation pit at the foundation elevation, before the foundation construction, the foundation construction should be carried out by manually impacting 10~20cm (commonly known as the last bauxite). Come out at once

Abandoned slag piles shall be piled up at designated locations, and shall not interfere with foundation pit excavation or other operations. Soil shall not be piled up near the pit on the foundation pit, so as not to affect the stability of the slope.

Precast cover plate: the concrete of each cover plate must be poured at one time without interruption, and the concrete is generally vibrated mechanically.

Mud masonry:

A stone should be laid in layers. Generally, 2 ~ 3 layers form a working layer, and each working layer should be approximately horizontal. Vertical joints shall be staggered with vertical joints of adjacent layers.

When using cement mortar, the width of flat joints and vertical joints is generally not more than 40mm, and it is not more than 30~70mm when paving with stone concrete. Wide vertical joints can be filled with stones not thicker than the width of the notch, and the stones should be wrapped with mortar.

Before the mortar solidifies, the joint should be exposed, and the depth of the joint should be not less than 20 mm. If this condition does not allow, before the mortar solidifies, the mortar joint should be not less than 20 mm to prepare for the joint.

After the joint construction is completed, the cement and climate conditions should be strengthened within 7 ~ 14 days. All mortar joints shall be filled with mortar.

Masonry:

Coarse stone masonry should be leveled and laid to a certain level. Before paving the road, stone materials matching the thickness, appearance and type of the layer should be selected.

Any decorative stone should be built as a whole. Joints shall be vertical and smooth, the width of coarse stones shall not exceed 20mm, and the width of precast concrete blocks shall not be greater than 10mm.

Any decorative stone should overlap with adjacent stone layers, and the overlapping length should not be less than 100mm, which is not applicable to the vertical joints of the upper and lower layers of stellite.

References:

Baidu encyclopedia-Gaihan