Medium-term construction measurement management work, mainly to implement the center of the measurement group's job functions. Is the focus of the work of the measurement group, but also the value of the establishment of the measurement group. Specifically, in addition to the normal supervision of sampling, review, side station, acceptance of the work, the other main content of the work is reflected in the measurement and determination of the amount of work. Combined with the previous work experience, for the mid-term work of the measurement group, I think as follows:
First, strengthen the supervision and management of the construction unit. Specifically, to strengthen the functional communication between the contractor, carefully review the contractor's construction sampling information, according to the technical specifications required to check and review the construction sampling of sub-projects and important processes in a timely manner. Approval of the construction of the reported measurement data, especially to strengthen the bridge, tunnel plane and elevation control checks, as well as sub-completion measurement acceptance.
Secondly, the organization and implementation of quantitative measurement and change of measurement work of the tripartite joint measurement. Timely completion of internal calculations and reporting of measurement confirmations and related information. For the project measurement and improve the construction of change procedures to provide basic measurement information. The following is a specific description of the work content of the arrangement.
Two, measurement supervision
1, construction sampling report approval. For the roadbed in the pile sampling, general structure base sampling, according to the ministry of transportation issued by the inspection and evaluation requirements of the standard frequency of supervision sampling, sampling frequency of 20%; for the construction of high slopes excavation sampling, it is appropriate to do a 100% review and inspection; for the bridge pile sampling, sampling frequency of not less than 50%.
2, construction process hidden acceptance measurement. Roadbed filling according to the ministry of transportation issued by the standard frequency of inspection and evaluation requirements for supervision of sampling, sampling frequency of 20%; into the pile pile should be done 100% review acceptance; column center acceptance sampling frequency of not less than 50%; bedding stone elevation acceptance sampling frequency of 100%; beam plate top surface elevation acceptance of the owner's relevant requirements of sampling; the whole of the acceptance of the layer of sampling also to the owner's relevant requirements. The acceptance of the initial masonry section of the tunnel shall be collected according to the relevant requirements of the owner. Tunnel final masonry section according to the Ministry of Transportation issued by the inspection and evaluation requirements of the standard frequency of supervision and sampling, sampling frequency of 20%; center line, elevation sampling frequency of not less than 50%.
3. Supervision information is organized and archived. Surveying group of supervision picking up information to keep their own archives.
Three, engineering measurement and tripartite measurement:
1, the concept of tripartite measurement, significance, procedures
1) Concept: the so-called tripartite measurement refers to the measurement of the project and changes in the measurement of the owner's department, the supervision department, as well as contractors of the three major subjects*** with the participation of the supervisory surveying group on-site measurement, the three *** with the on-site signatures to confirm the confirmation of a kind of work. Behavior.
2) Significance: to make the project measurement and engineering changes in the measurement of this sensitive issue becomes objective, fair and transparent, so that the complexity of the difficult to operate the change in the measurement of the problem has become simple, clear, and fast; so that the rights and responsibilities of the parties involved in the construction of the organic unity; to strengthen the three major subjects of the mutual cooperation, mutual trust.
3) Procedures: to establish the intention to change the measurement of measurement - the convening of an on-site meeting - the minutes of the meeting issued by the change - the implementation of the tripartite joint test -Submit the confirmation of tripartite joint measurement-enter the project measurement
2, the project involves the specific content of the work of the tripartite joint measurement
1) the original ground change review.
2) Soft foundation treatment: a, dredging and filling; b, clearing the table fill bedding; c, structure base filling. d, roadway trench filling.
3) Review of monthly measurement of roadbed earth and stone.
4) Change of soil and rock ratio.
5) Removal of garbage and waste soil.
6) Changes in site grading, cut-and-fill slopes.
7) local ditching, road construction
8) filling and shaping, greening area
3, three-party joint measurement of some specific work practices
1) the original ground change review: when the construction unit reported to the original ground changes in the measurement information (such as changes in the cross-section, changes in the ground level of the entrance and exit of the culvert, etc.), the center of the measurement group will promptly organize the staff to cooperate with the main body to review work Personnel with the main body of the review work. Before the review, the construction unit is required to lay down the pile position according to the specific measurement method, and the measurement group brings its own instruments to carry out the measurement. The recording mode is section method or detail point method.
2) Measurement of soft foundation treatment: a. For the whole process of dredging and refilling, three joint measurements are usually arranged: i.e., measurement of the original ground elevation of the refilling area, measurement of the pit area and base elevation after excavation, and measurement of the top elevation and area after the refilling is completed. b. For the whole process of clearing and filling of bedding, two joint measurements are usually arranged: i.e., measurement of the ground elevation of the refilling area after clearing and filling, and measurement of the filling area and top surface elevation after the completion of bedding. Top surface elevation measurement. c. The whole process of structure base filling is usually arranged for one joint measurement: i.e. bottom surface elevation and area measurement after completion of base excavation and cleaning. d. The whole process of road trench filling is usually arranged for one joint measurement: i.e. base elevation measurement after completion of road trench excavation. e. The whole process of road trench filling is usually arranged for one joint measurement: i.e. base elevation measurement after completion of road trench excavation. Can also be strictly required to carry out another backfill after the top elevation measurement. All the measurement methods and calculation methods are interrelated, sometimes in order to match the actual situation of the construction site, the number of joint measurement methods and calculation methods are also corresponding to the variation. For example, for a large pit or filling area, it is necessary to carry out several joint measurements or even block measurements until the work is completed in a complete and uniform manner. Soft foundation treatment measurement and recording mode generally adopts uniformity fine point method, roadway trench filling can be used cross-section method.
3) roadbed earth and stone monthly measurement review: roadbed construction phase of regular earth and stone monthly measurement of joint measurement work, generally according to the owner's requirements depending on the measurement control mode. Measuring group to arrange personnel to follow up and participate in the construction unit is required to put a good roadbed center pile, side pile, on-site measurement data, we sign on-site to confirm. The construction unit reported the basis of measurement data to the joint measurement information for review and sign.
4) soil and stone proportion change measurement: for the soil and stone proportion of the whole process of measurement, the general concept is usually arranged for a joint measurement, divided into two cases: a, that is, when the construction of the construction of the construction section dug to the soil and stone demarcation of the time, the site parties determined that you can carry out the measurement of the work, with the method of measurement of the cross-section, and at the same time the work of the site sampling, video camera, etc. b, that is, in the construction of the construction section construction After digging out the roadbed stone, the site according to the residual traces of the slope for measurement, with longitudinal section measurement method, at the same time the work of the site sampling, video camera, etc.. Both ways can be relatively accurate to establish the proportion of soil and stone engineering quantities. Only in the calculation method and information mode differences.
5) garbage waste soil removal: the construction site inevitably exists in the garbage waste soil removal work. This content in the parties believe that the implementation of the survey is usually arranged for a joint survey, the record mode using the detail point method.
6) site leveling, slope filling and excavation changes: according to past work experience, there are generally changes in site leveling earth calculation. On the one hand, the reason is that the design does not take into account the workload of slope filling and excavation, on the other hand, the original ground elevation of the site used in the design of the square calculation comes from the graphic data, the error is large; therefore, for the whole process of site leveling usually arrange two joint measurements: that is, the original ground elevation of the site before the leveling of the determination of the measurement of the ground elevation of the site area after the completion of the leveling of the ground elevation of the site area after the acceptance of the measurement of the existing ground elevation. Slope cut and fill is synchronized with joint measurement after the completion of leveling work. Before the measurement, the construction unit is required to do a good job of stake placement, measurement mode using cross-section method, the field can also be used in the square grid method.
7) Local ditching and road construction: for local ditching and road construction, the construction unit is required to carry out the survey before the joint measurement, and the whole process is usually arranged for two joint measurements: i.e., cross-section measurement of the original ground in the construction area before the construction, and cross-section measurement after the completion of the construction. The measurement record mode is cross-section mode. Of course, depending on the characteristics of the project can also be carried out only once joint measurement (such as fill soil is very thin local road).
8) fill soil shaping, greening area volume: the project into the late shaping greening, this aspect of the volume of work is not easy to draw clear, need to carry out tripartite joint measurement. For filling soil shaping usually arrange two joint measurement: that is, before shaping the ground status measurement, shaping the ground status measurement after completion. Measurement method adopts topographic map detail point measurement method, the record mode is detail point mode, according to the site conditions can be used twice with a relative coordinate system. For the measurement of greening area, only one joint measurement is arranged: that is, the peripheral area and topographic measurement of greening area after completion of greening. Measurement method adopts topographic map detail point measurement method, and the recording mode is detail point mode.
Four, Summary
After the completion of the above work, the second phase of the survey work is basically completed. In this work process, the survey team should keep in mind that a quasi-measurement is: must be in accordance with the project construction of light, heavy, slow, urgent, reasonable adjustments and personnel deployment, serious, serious, objective, fair and reasonable work, to ensure that the quality of re-measurement and timeliness, and actively cooperate with the contractor to do a good job of checking the work, and must not affect the progress of the construction.
Of course, the surveying team may also be involved in other departments of the content of the work, such as supplemental land acquisition review confirmation, building construction start checking the line, etc., because of the content of these less, belonging to the surveying team's service functions, this plan will not be described in detail.