used for the same purpose as defined in Tables 1 and 2 in 22 TCN The materials must comply with specified grading and plasticity. 22 TCN CONSTRUCTION METHODS. Prior to laying the sub-base or base, the Contractor shall correct any deformations, ruts, soft spots or other. 22 Tháng Mười Hai 22 TCN *) Quy trnh th nghim xc nh CBR ca t, dm trong phng th nghim. 22tcn cac lop ao duong cap phoi thien nhien – thi.
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The poor pavement condition is not uniform and there are significant lengths with only slight or moderate deterioration and other areas where no deterioration is evident.
Aggregate largest dimension 2tcn to 70mm.
This table also shows that: Trong ma ma phi c bin php hn ch t ri vi trn mt ng ang khai thc v hn ch thi gian xe phi chy trc tip trn nn t mi thi cng nn c gng lm mt ng sm. The principal conclusions of this report are: Was the 22tch suitable for the actual traffic?
The implication is that some of the variability within the Table has probably been caused by inaccurate classification within the vehicle classes.
It is also necessary to add the traffic that travels during the hours between 6. Pavement run-off is impeded by pavement shape at m at the edge of left shoulder, and by shoulder shape Drainage still functioning well Gravel shoulder is slightly eroded.
Cch thc kim tra cht lng thi cng cc loi rnh v sai s cho php phi tun theo cc qui nh ti Bng 1. Cch kim tra v tiu chun cht lng tng phng h xy Ni dung kim tra Sai s cho php so vi thit k Cch kim tra Cng va Khng nh hn thit k C mt ca thi cng ly hai t mu th Cao Mt trn 20 mm My thy bnh o trc v sau khi xy. The markedly different performance of sections of the same design but built by different contractors, further indicates that the quality of materials and the quality of construction probably significant factors.
LHS — grass but still functioning. However, under special arrangements agreed by the MoT for the RRST trials, the following additional supervision procedures were also in place: Option CH3 In good condition, with slight lost of seal surface, no cracking and slight rutting, average depth 20 mm DBM — good condition, slight loss of fine aggregate Surface run-off impeded slightly by pavement shape LHS — none at last 50m — remaining grass-filled but functioning No right side drainage Not definable Sealed DBM in good condition.
22 TCN 06 Ao duong mem | Phạm Văn Luân –
Trong tiu chun ny nn p c cp phn bit 03 trng hp: Significant potholes and pavement settlement. V tr v s im th nghim kim tra do T vn ch nh nhng khng nn nhiu hn mt v tr trn mt on thi cng di 50 m. Tuy nhin vn phi chn tr s khi lng th tch kh ln nht tuyt i trong ton b tp kt qu thu c lm cht tiu chun hin trng max. Table 11 Estimates of heavy traffic on the trial road ADT July July Jan Elapsed time Vehicle type Heavy trucks Dec 0 months 12 months 18 months 30 months 10 79 41 There are a number of likely errors in this calculation.
This question is dealt with further in the following Chapter but essentially; within months the traffic carried by the road is double the 10year design figure and hence the volume of traffic and its axle loading have far exceeded the design objectives of the road. Recommendations as to the prevention of similar failures occurring in the future programmes are also presented. Son tho quy trnh 22hcn ngh m nn t ln ng dng chnh thc cho thi cng i tr. Vic kim tra cht lng m nn cng phi thc hin tng lp theo cch qui nh 22gcn 7.
BUON HO ROAD – Research for Development
Rut depth up to mm. Mp ta luy con trch phi cch nh ta luy o ti thiu l 5 m. Trong tiu chun ny vic kim tra cht lng m nn lp t ln trc ht vn 3004-03 vo khi lng th tch kh cht ln nht max c th t c tng ng vi t hp my v cng ngh m nn thch hp nht thc c, thc lm trn on thi cng th nghim hin trng, tc l ly tr s max xc nh hin trng ni trn lm cht tiu chun thay cho cht tiu chun xut pht t th nghim m nn trong phng th nghim.
Ri th nghim v b tr on thi cng th nghim.
TCVN 9436 – 2012 Nen Duong Oto Thi Cong Va Nghiem Thu
In order to examine these possibilities it is necessary to estimate the likely traffic capacity assuming that the road was built properly and the 304–03 were satisfactory. In good condition, with slight lost of seal surface, no cracking and slight rutting, average depth 20 mm.
The original design and hence the as-built road were totally inadequate for the traffic it actually carried. Pavement in bad condition, extensive crocodile cracking and potholes with rutting up to mm 5.
Vt liu p loi ny c th xc nh c cht tiu chun trong phng th nghim theo 22 TCN The specifications for the materials are designed to prevent this. Khng c p bng cc loi phong ha v khng p ln ln cc loi vt liu khc nhau.