Three key stages of earthwork cost control

Before the tender, a review meeting of earthwork construction scheme attended by all departments shall be held to carefully review the feasibility and economy of the construction scheme, optimize the cost of the construction scheme as much as possible and control the earthwork cost in advance. At this stage, the cost engineer intervened in time to estimate the cost by calculating the earthwork balance of various construction schemes. Analyze the influence of different schemes on the cost, and provide reference for the selection of the final construction scheme.

The evaluation of earthwork construction scheme focuses on the selection of excavation mode (manpower, machinery and man-machine cooperation ratio), the selection of transportation mode, the determination of transportation distance, the transshipment of earthwork in the site, the reserved earthwork quantity and stacking position in the site, the amount of waste soil and the avoidance of secondary transshipment.

The construction plan at this stage shall include the following contents:

First, the geological exploration report is provided to the bidder. According to the geological survey report issued by Party A, the bidder determines the earthwork category and the quotation. When inviting tenders, it is required to indicate that the bidder fully considers the quotation according to the geological survey report, and the unit price will not be adjusted at the time of settlement no matter what soil quality it encounters. Bidders are also required to fully consider the weather factors, and the expenses involved in slope protection and slope collapse are fully considered in the quotation, and no adjustment will be made during settlement.

Second, do a good job in the elevation measurement of the original site in advance, which requires the engineers and supervisors of Party A, and keep the image data of the original terrain, and determine the actual vertical height, working face and slope coefficient of excavation according to the soil quality, the foundation elevation of the design drawings and the actual situation. Bidders are required to implement this plan.

Third, make clear the unit of measurement and calculation method of settlement. Calculated by the natural dense earthwork volume on site, it is strictly prohibited to measure by the imaginary volume of on-site transport vehicles or by the number of mechanical shifts. Earthwork quantity calculation should be based on theoretical quantity, and it is strictly prohibited to settle according to actual excavation size and slope coefficient.

Fourthly, if site storage is needed, the plan should fully consider the location of site earthwork storage to prevent secondary transshipment and earthwork loss caused by lax supervision.

Fifthly, the tender documents need to make it clear that Party B will carry out the construction in strict accordance with the construction plan confirmed by both parties, and it is strictly forbidden to exceed the excavation, and the cost of exceeding the excavation will not be paid, and the increased cost due to Party B's exceeding the excavation will be borne by Party B. ..

Sixth, the tender documents also clearly stipulate that the bidder shall be responsible for the cleaning costs of transport vehicles and the communication costs in road transportation, and the bidder shall be responsible for the fines and other expenses in transportation, so the construction period cannot be affected. Determine the warranty period and warranty money.

Seventh, when signing the contract, it is necessary to sign the final implementation plan (site engineer, supervisor and construction unit) for confirmation and filing. If there is any deviation between the final plan and the bidding plan, it is necessary to communicate with the cost personnel in time, work directly without the consent of the cost, and it will not be confirmed during settlement.

Second, the construction stage

Before construction, Party A's on-site engineers, cost engineers, on-site cost engineers of consulting companies, supervisors and construction units are required to confirm the original elevation of the site, and the elevation grid diagram (10× 10) with photos shall be signed by the four parties and filed in quintuplicate.

During the construction, the supervisor and the engineer of Party A at the site shall follow up and check the elevation and slope of the excavated earthwork to prevent over-excavation. After the excavation line is released, the supervision engineer and the site engineer of Party A will carry out the retest of the excavation line. Track the excavation slope at any time during the excavation. After the excavation work is completed, the foundation perimeter of this part will be released in the pit immediately, the deviation will be adjusted in time, and the cost personnel will be informed in time. After the excavation (filling) operation is completed or before concealment, the field engineer, consulting company, supervisor and construction unit need to measure and confirm the actual working face on site, and finally form the elevation map of the finished face (the design basement elevation or the elevation agreed by both parties) signed by the four parties. Before measurement, it is necessary to inform the cost engineer to participate in it, and the information directly concealed or without cost will not be confirmed when it is settled with the consulting company participating in the confirmation.

In case of special geological conditions during construction, it is necessary to inform the cost personnel (consultants) in time to participate in the cost estimation of the on-site change plan audit. The data before and after the change (with photos) need to record the earthwork elevation and boundary size before and after the change in detail.

Third, the earthwork completion settlement stage

For earthwork settlement submitted by the construction unit, the elevation map of the delivery site (with photos) and the elevation map of the finished surface (with photos) confirmed by the site engineer, cost engineer, site cost engineer, supervisor and construction unit of Party A must be provided, and the elevation map must have clear boundary lines, slopes, working faces and other actual conditions (except the slopes and working faces agreed in the contract); Detailed grid calculation diagram (10× 10) and related calculation books shall be divided; A complete record of concealed works; Completion acceptance data; List and explanation of relevant deduction or reward and punishment expenses.

Settlement data submission: construction unit-submission supervision-site engineer-cost consultation-cost engineer-cost department.

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