- Center for Survey Group overall work of the highway
               The draft scheme of arrangement (b)
First, an overview of
The medium-term management of the construction survey, the main measure to implement the central group functions of the main post. Is a measure of focus of the work group, but also the establishment of measuring the value of meaning of the group. Specifically, in addition to the normal supervision pumping pick, reviews, next to the station, inspection work, the other main tasks for the project reflects the amount of determination and determination. Combination of past experience, for measuring the medium term, job content, my thoughts are as follows:
       First of all, to strengthen management of the construction supervision unit. Specifically, is the strengthening and the functions of communication between the contractor carefully reviewed the contractor's construction layout information, according to technical specifications, inspection and timely review of sub-projects and important process of construction layout. Approval of construction reported measurement data, in particular, to strengthen the bridge, tunnel plane and elevation control checks, as well as sub-items measuring completion and acceptance.
     Second, the organization and implementation of engineering quantity surveying measurement and change the tripartite joint measurement. Within the industry, the timely completion of the calculation, and reporting measurement confirmation and related materials. For the project to change procedures for measuring and improving the construction provide the basis for measurement data. The following specify the content of the work arrangement.
2, measurement Supervision
1, construction inspection orders lofting approval. For the subgrade in the pile lofting, lofting the general constructs the basement, according to the Ministry of Communications promulgated by the frequency of inspection and assessment of supervision required standard pump pick up, picking up frequency of smoking 20%; for lofting high slope of the excavation, to do a 100% review of inspection; For the bridge pile-bit lofting, pumping picking up the frequency of not less than 50%.
2, the construction inspection process hidden measurement. Embankment filling Inspection and Evaluation by the Ministry of Communications issued by the frequency of supervision required standard pump pick up, picking up frequency of smoking 20%; into a pile-bit to do a re-test 100% of income; column center frequency of acceptance of picking up smoking less than 50%; pad stone elevation pumping frequency of inspection should pick up 100%; flat-slab top surface elevation of acceptance to the relevant requirements of the owners picking up smoking; overall acceptance extraction layer also picking up the relevant requirements of the owners. The beginning of the tunnel cross-section acceptance in order to assemble the relevant requirements of the owners pick up smoking. The final section of the tunnel puzzle Inspection and Evaluation by the Ministry of Communications issued by the frequency of supervision required standard pump pick up, picking up frequency of smoking 20%; centerline, elevation drawn picking up the frequency of not less than 50%.
3, supervision archive data compilation. Survey collected information on smoking group supervision on their own safekeeping archives.
3, engineering, measurement and the tripartite joint test:
1, the tripartite concept of joint measurement, significance, procedures
1) Concept: The so-called tripartite joint test refers to changes in the engineering of measurement and measurement, there are owners departments, supervision departments, as well as the three main contractors to participate in a group of on-site supervision measure measurement, the three parties signed a common scene confirmed a working行为.
2) Meaning: to make the project measurement and engineering change the sensitive issue of measurement has become an objective, fair and transparent, so complicated and difficult to change the operation of the measurement of simple, clear, and fast; so that the powers and responsibilities of all parties participating in the construction has been an organic unity; strengthened the three principal mutual cooperation, mutual trust.
3) Procedure: Determination of the intention to establish measures to change - hold on-site meetings - minutes of meeting issued to change - implementation of the tripartite Joint Measurement - Measurement confirmation of submission of the Tripartite Alliance - has entered the construction measures
2, this project involves the specific work of the Tripartite Alliance measured the content of
1) The original review of the ground changes.
2) soft foundation treatment: a, dredging for fill; b, clear the table filling cushion; c, constructs for filling the basement. d, Lu tank for filling.
3) measured monthly review of earth and stone embankment.
4) The earth-rock ratio of change.
5) refuse, discarded earth removal and transportation.
6) site formation, Watian slope change.
7) The local change groove, changing road earthwork
8) Fill plastic, green area
3, the tripartite joint test some of the specific work practices
1) The original review of the ground changes: When the construction unit to report about the changes to the original ground measurement data (for example, cross-sectional changes in elevation of the culvert entrances and exits on the ground change, etc.), the Center Survey Group will promptly organize staff work with the major review by the principal. Review pre-construction units required based on specific measurement of pile setting out a good bit, measuring instruments Shi own test group. Record mode cross-section method or the detail-point method.
2) soft foundation treatment measurements: a, for dredging the arrangements for filling the entire process is usually measured three times together: that for filling the region of the original surface elevation measurements, after excavation pit area and the basal elevation measurements for filling the top elevation and size of the finished measurements. b, clear the table for the whole process of filling cushion arrangement is usually measured two together: that clear the table after the filling of regional ground-elevation measurements, cushion filling after filling area and the top surface elevation measurements. c, constructs base for filling the whole process is usually to arrange a joint test: the underside of the basement excavation is complete clean-up elevation and size measurements. d, Lu tank for filling the entire process is usually associated to arrange a test: that road is completed excavation of the base tank bottom elevation measurements. Can also be demanding a further elevation of measuring the top after filling. All the measurement methods and calculation methods related to each other, sometimes in order to cope with the actual situation of the construction site, together measuring the number of methods and calculation methods adapted accordingly. For example, excavation or filling large areas, it is necessary to conduct a joint test on many occasions and even block measurement, until a complete and unified the job done. Soft foundation treatment survey record mode commonly used uniform detail-point method, alignment can be used to fill slots for cross-sectional method.
3) The monthly measure of earth and stone embankment for review: subgrade construction phase regular monthly measurement of the joint measurement of earth work, in general, as measured according to the requirements of owners control patterns. Measured at test facilities arranged with staff to track participation, require their own stake out a good roadbed construction unit in the piles, pile side, on-site facilities measurement data, we confirm the signature site. Construction units of measurement data reported based on a joint review of test data to sign and acknowledge.
4) The change of earth-rock ratio measurements: estimates for the entire process of earth-rock ratio, the overall concept is to arrange a joint test is usually divided into two kinds of situations: a, that is, when the construction tenders construction of earth and rock excavation to the boundaries of time, on-site parties Shi measurements can be identified when working with cross-section measurements carried out at the same time the work on-site sampling, camera pictures. b, namely, the construction tenders in the construction roadbed excavation End Rock, the crowd based on the residual traces of Shi slope measurements using vertical section measurements carried out at the same time the work on-site sampling, camera pictures. Two kinds of methods can be relatively accurate ratio of the project to establish the number of excavated rock. Only in the calculation method and data patterns vary.
5) The garbage disposal soil removal and transportation: construction site, the inevitable existence of the work of garbage waste removal and transportation of soil. The contents of the parties considered to have the case of Shi arrangements are normally measured once a joint measurement, recording mode using detailed point method.
6) site preparation, excavation and filling of slope change: According to past experience, generally there is the question changes to site preparation earthwork calculation. On the one hand because it was designed to provide slope Watian without considering the workload on the other hand, designed for grid computing space of the original ground elevation data derived from the diagram, the error is relatively large; Therefore, for site preparation is usually the whole process arrangements for joint measurement twice: the formation of pre-determined field area of the original surface elevation measurements, formation work is completed for the field inspection of existing ground elevation measurements. Slope Watian the formation work is completed in parallel joint measurements. Measurement of pre-construction units do require pile-bit lofting work, measurement mode using cross-sectional method, field area can also be used grid method.
7) The local change ditch earthwork diversion: the need to ditch the local reform, changing parts of the road, together require the construction unit of the former test measured prior to lofting, the whole process usually organized twice a joint test: that the pre-construction works of the original surface area cross-sectional measurements, the construction is complete cross-section measurements. Cross-sectional survey record mode models. Of course, visual engineering characteristics once associated only measured (for example, where very thin fill Road).
8) Fill plastic, the amount of green space projects: the advanced stage of plastic green projects, this aspect of the work is not easy to drawings clearly in need of a tripartite joint measurements. Plastic is usually arranged for filling the two joint test: that the status quo on the ground pre-measured plastic, plastic on the ground after the completion status of measurement. Measurement method using detailed topographic map-point measurement, recording mode for the detail-point mode, the scene twice with the situation can be a relative coordinate system used. For the measurement of green area, only to arrange a joint test: the completion of the external area of afforestation and greening of regional topography. Measurement method using detailed topographic map-point measurement, recording mode for detailed point pattern.
IV Summary
              After the completion of the work content, the second phase of the measurement tasks basically completed. In this work process in measurement by a working group should bear in mind the quasi-measurement is: must be construction of the light, heavy, slow, anxious to carry out reasonable adjustment and personnel allocation, work, serious, serious, objective, fair, reasonable, re-measured to ensure that the quality and timeliness, and actively carry out inspection work with the contractor, must not affect the construction schedule.
Of course, the measurement group may participate in the content of the work among other departments, such as additional land identified for review, the Housing construction starts building inspection lines, etc., because these elements smaller group belonging to measure the scope of service functions, this program will no longer be detail.