What are the regulations for dredging and grading?

Geological Survey Report

1 How much should the quota depth of artificial silt and quicksand be considered? Should the digging wet soil coefficient be performed?

Answer: The quota depth of artificial silt and quicksand has been comprehensively considered, and ultra-deep labor shall not be calculated. The digging wet soil coefficient is not performed.

2 How to deal with manual digging piles in case of quicksand and silt?

Answer: In case of quicksand and silt, the manual excavation pile excavation earthwork should be multiplied by the coefficient according to the actual number of visas of both parties, according to the corresponding depth earthwork quota.

3 What is the vertical arrangement of excavation and filling?

Answer: more than 300mm excavation, fill earth, with grid or section method control, to determine the natural elevation and design elevation and the height that should be excavated or filled, in order to dig and fill to the design elevation, called vertical layout excavation, fill.

4 When calculating the foundation earthwork grading, how should the amount of repetitive work at the junction be calculated?

Answer: When calculating the foundation earthwork grading, the amount of repetitive work at the junction is not deducted. If the repetition at the slope is too large, the total amount calculated is equal to or greater than the amount of large excavation, the amount of earthwork should be calculated according to the provisions of large excavation.

5. Dig the earthwork between the prefabricated piles, and multiply the coefficient according to the solid volume. How is solid volume calculated?

Answer: Take the outer edge of the pile as the boundary, and the excavation within the outer edge line (deducting the volume occupied by the pile) is manually multiplied by the coefficient according to the corresponding quota.

We do the road, just the roadbed is also from the pond, we are an excavator digging in the pond, I give the slope ratio is, Party A acquiesced.

Or you give it too.

Earthwork excavation in the construction organization design, there should be a single earthwork construction plan, the construction preparation, excavation method, grading, drainage, slope support should be designed according to the requirements of the relevant specifications, slope support to have a design calculation.

Foundation pit excavation should be in strict accordance with the requirements of the slope, the operation should be with the stability of the slope, and the problem should be reinforced in time. In order to prevent the collapse of the earth wall and ensure the safety of construction, when the excavation exceeds a certain depth or the fill exceeds a certain height, its edge should release enough slope with Xianxun, and the earthwork slope is generally expressed by the slope slope and slope coefficient.

Legal analysis: In the construction of silver land, the slope is not all started with the cushion under the flat, and it should be determined according to the slippery grasp of the cushion material; When the excavation depth of the first and second types of soil exceeds the meter, the slope coefficient is when the manual excavation is carried out, the mechanical pit is divided into the pit and the pit, the slope coefficient in the pit is, the slope coefficient on the pit is, the slope coefficient of the three types of soil exceeds the meter when the slope, the slope coefficient is artificially sharp, the mechanical pit is, and the pit is. Legal basis:

Article 58 of the Construction Law of the People's Republic of China Construction enterprises are responsible for the construction quality of the project. Construction enterprises must be in accordance with the engineering design drawings and construction technology standards, and must not cut corners. The modification of the engineering design shall be responsible for the original design unit, and the construction enterprise shall not modify the engineering design without authorization.

Putu: starting point of grading: , grading coefficient, manual digging: mechanical digging: in the pit, rough mound operation on the pit.

Solid soil: starting point of grading: , grading coefficient, manual digging: mechanical digging: operation in the pit, pit operation grading system stool number for the height and width ratio.

Mixed soil: starting point of grading:, k=(k1h1+k2h2) hk--comprehensive grading coefficient.

K1K2--Grading coefficient of different soil types.

h1h2 – thickness of different soil types.

h -- the total depth of grading.

Foundation excavation: according to the shouting group code excavation bottom area multiplied by the depth of excavation to calculate by volume, when the excavation depth exceeds the starting point of the slope, the increase of the slope earthwork is calculated, and the local deepening part is incorporated into the earthwork quantity.

Point 1: Calculate by volume by multiplying the bottom area of the excavation by the excavation depth;

Point 2: When the excavation depth exceeds the starting point of the slope, calculate or sing the slope earthwork increment;

Point 3: The local deepening part is incorporated into the earthwork quantity.

The calculation of the grading coefficient of the trenched earthwork is specified as follows:1) The excavation depth is within lm, and the slope is not considered;

2) excavation depth in, according to the slope;

3) excavation depth in, according to the slope;

4) digging Zheng which soil depth is in, according to 1:1 slope;

5) If the excavation depth is greater than 5m, the slope shall be graded according to the calculation of soil stability theory.

1. When the site conditions permit, and the ruler can ensure the stability of the slope, the slope excavation can be used to simplify the state. In the case of multi-level grading, the overall stability of the slope at all levels and the slope at the multi-level slope should be checked at the same time. When there is a local pit near the foot of the slope, the stability of the slope should be checked according to the depth of the pit;

2. The slope slope and the width of the grading platform should be determined by calculation according to the nature of the soil layer, excavation depth, load, etc. For the foundation pit of multi-level slope excavation, the width of the slope platform between slopes should not be less than;

3. If precipitation measures are taken for excavation foundation pit without waterproof curtain, the precipitation system should be set at the top of the slope of the single-stage grading foundation pit, or the slope platform and slope top of the multi-level grading foundation pit;

4, the surface of the slope can be based on the excavation depth of the foundation pit, the exposure time of the foundation pit, the soil conditions and other conditions to take slope protection measures, slope protection can take cement mortar, hanging net mortar, concrete, reinforced concrete, etc., can also use the slope pressing method;

5. The slope is located in the Bang fill area, and the slope excavation can only be carried out after soil reinforcement and other measures should be adopted; 6. The construction load of the slope crest of the slope excavation foundation pit and the slope platform should meet the design requirements.

Summary. Dear, hello, has been for you to inquire about the excavation of the foundation pit how to deal with the silt construction is the general foundation pit needs to be backfilled, can deal with a part, the rest of the only way to ask the earthwork team to deal with it, they will transport away before the excavation of the foundation pit, set up the tube well point precipitation, in order to facilitate the excavation of personnel and mechanical operations and soil loading and unloading transportation. The top layer is excavated with a long-arm excavator, and a small loader is used in the pit during the excavation process to push the earthwork away from the excavator to the working range of the excavator.

The following earthwork is excavated with manpower with excavators, and dump trucks are lifted by cranes. The excavated earthwork is stored in the temporary dump during the day, and the excavated earthwork is transported directly to the dump site at night. The position of the small excavator (in and out of the working face, turning around, etc.) is lifted by crane.

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Dear, hello, has been a group of virtual tours for you to inquire about the excavation of the foundation pit how to deal with the construction of the construction is the general foundation pit needs to be backfilled, can deal with a part, the rest of the only one to ask the earthwork team to deal with, they will transport away Before the excavation of the foundation pit, set up the tube well point precipitation, in order to facilitate the excavation personnel and the reputation of the machine machine operation and soil loading and unloading transportation. The top layer is excavated with a long-arm excavator, and a small loader is used in the pit during the excavation process to push the earthwork away from the excavator to the working range of the excavator. The following earthwork is excavated with manpower with excavators, and dump trucks are lifted by cranes.

The excavated earthwork is stored in the temporary dump during the day, and the excavated earthwork is transported directly to the dump site at night. The position of the small collapse pin excavator (in and out of the working face, turning around, etc.) is lifted by crane.