Determination of Plastics Pipeline Span for Overhead Installation

doi:10.19491/j.issn.1001-9278.2020.06.010

Abstract

Abstract:

This paper provided a methodology for the determination of plastics pipeline span for overhead installation on the basis of the theory of material mechanics and creep test data. This method was applied to calculate the spans of PVC?U pipe for power installations and PE pipe for water supply. The results indicated that the plastics pipeline could meet the requirement for the use of urban integrated pipe gallery. This paper also gives a reference for further study on the long?term performance and applications of plastics pipeline.

Key words: urban integrated pipe gallery, plastics pipeline, overhead installation, span, creep performance

CLC Number:

TQ320.79

Yanjun LI, Jiayu ZHAN, Miao JIN, Tong LI, Wenbo ZHANG. Determination of Plastics Pipeline Span for Overhead Installation[J]. China Plastics, 2020, 34(6): 60-65.

材质	密度（ρ）/g·cm^-3	设计应力（σ_s）/MPa	E/MPa
PVC?U	1.46^[3]	10^[3]	2 600
PE?HD	0.93^[4]	8^[4]	1 000

材质	密度（ρ）/g·cm^-3	设计应力（σ_s）/MPa	E/MPa
PVC?U	1.46^[3]	10^[3]	2 600
PE?HD	0.93^[4]	8^[4]	1 000

公称内径（d）/mm	公称壁厚（e_n）/mm
公称内径（d）/mm	SN16	SN24	SN32
100	4.5	5.0	6.0
125	5.0	6.5	8.0
150	6.5	8.0	9.5
175	8.0	9.5	11.0
200	9.0	11.0	13.0
225	10.0	12.0	14.0
250	11.0	13.0	15.0

公称内径（d）/mm	公称壁厚（e_n）/mm
公称内径（d）/mm	SN16	SN24	SN32
100	4.5	5.0	6.0
125	5.0	6.5	8.0
150	6.5	8.0	9.5
175	8.0	9.5	11.0
200	9.0	11.0	13.0
225	10.0	12.0	14.0
250	11.0	13.0	15.0

公称外径（D）/mm	公称壁厚（e_n）/mm
公称外径（D）/mm	PN1.25	PN1.6	PN2.0
110	8.1	10.0	12.3
125	9.2	11.4	14.0
140	10.3	12.7	15.7
160	11.8	14.6	17.9
180	20.1	16.4	13.3
200	14.7	18.2	22.4
225	16.6	20.5	25.2
250	18.4	22.7	27.9
280	20.6	25.4	31.3
315	23.2	28.6	35.2
355	26.1	32.2	39.7
400	29.4	36.3	44.7

Determination of Plastics Pipeline Span for Overhead Installation

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序号	t/h	Y_t/mm	计算点范围	A	B/mm	R	Y₅₀/mm
1	0.1	6.52	1~13	0.881	6.930	0.877	11.90
2	1	6.75	2~13	1.009	6.599	0.863	12.29
3	4	7.51	3~13	1.068	6.441	0.798	12.47
4	24	7.92	4~13	1.417	5.469	0.784	13.46
5	168	8.10	5~13	2.453	2.507	0.914	16.34
6	336	8.73	6~13	2.742	1.657	0.869	17.12
7	504	8.83	7~13	3.104	0.575	0.839	18.09
8	619	8.96	8~13	2.744	1.669	0.743	17.15
9	674	9.71	9~13	1.513	5.437	0.996	13.97
10	840	9.88	—	—	—	—	—
11	1080	10.02	—	—	—	—	—
12	1200	10.09	—	—	—	—	—
13	1392	10.2	—	—	—	—	—

序号	t/h	Y_t/mm	计算点范围	A	B/mm	R	Y₅₀/mm
1	0.1	12.62	1~13	1.001	12.86	0.769	18.51
2	1	12.88	2~13	1.208	12.32	0.762	19.13
3	4	13.16	3~13	1.422	11.75	0.728	19.77
4	24	13.87	4~13	1.877	10.48	0.691	21.07
5	168	14.04	5~13	3.541	5.726	0.862	25.70
6	336	14.15	6~13	4.479	2.970	0.872	28.24
7	504	14.82	7~13	4.132	4.006	0.763	27.32
8	619	15.20	8~13	3.193	6.852	0.624	24.87
9	674	16.33	9~13	1.303	12.63	0.997	19.98
10	840	16.44	—	—	—	—	—
11	1080	16.60	—	—	—	—	—
12	1200	16.70	—	—	—	—	—
13	1392	16.73	—	—	—	—	—

d_i/mm	D/mm	e_n/mm	q/N·m^?1	l_g/ m	l_q1/m
100.00	67.00	4.50	171.56	2.68	4.64
100.00	67.00	5.00	174.07	2.75	4.87
100.00	67.00	6.00	179.16	2.88	5.29
125.00	83.75	5.00	264.17	2.91	4.92
125.00	83.75	6.50	273.56	3.10	5.55
125.00	83.75	8.00	283.15	3.27	6.09
150.00	100.50	6.50	384.13	3.25	5.59
150.00	100.50	8.50	399.26	3.47	6.32
150.00	100.50	9.50	406.97	3.57	6.64
175.00	117.25	8.00	526.49	3.56	6.19
175.00	117.25	9.50	539.73	3.71	6.69
175.00	117.25	11.00	553.17	3.85	7.15
200.00	134.00	9.00	686.23	3.79	6.57
200.00	134.00	11.00	706.40	3.98	7.20
200.00	134.00	13.00	726.94	4.15	7.76
225.00	150.75	10.00	867.11	4.00	6.93
225.00	150.75	12.00	889.76	4.19	7.53
225.00	150.75	14.00	912.77	4.36	8.07
250.00	167.50	11.00	1069.12	4.21	7.27
250.00	167.50	13.00	1094.24	4.39	7.84
250.00	167.50	15.00	1119.73	4.55	8.37

D/mm	e_n/mm	q/N·m^?1	l_g/m	l_q2/m
110.00	8.10	93.17	2.79	5.14
110.00	10.00	92.79	2.91	5.57
110.00	12.30	92.34	3.02	6.00
125.00	9.20	120.31	2.98	5.48
125.00	11.40	119.81	3.10	5.95
125.00	14.00	119.24	3.22	6.40
140.00	10.30	150.92	3.15	5.80
140.00	12.70	150.30	3.28	6.28
140.00	15.70	149.57	3.41	6.78
160.00	11.80	197.11	3.37	6.20
160.00	14.60	196.29	3.51	6.73
160.00	17.90	195.36	3.64	7.24
180.00	20.10	247.27	3.86	7.67
180.00	16.40	248.44	3.72	7.14
180.00	13.30	249.46	3.58	6.58
200.00	14.70	308.01	3.77	6.93
200.00	18.20	306.72	3.93	7.52
200.00	22.40	305.25	4.07	8.10
225.00	16.60	389.80	4.00	7.36
225.00	20.50	388.18	4.16	7.98
225.00	25.20	386.33	4.32	8.59
250.00	18.40	481.25	4.21	7.75
250.00	22.70	479.27	4.39	8.40
250.00	27.90	476.99	4.55	9.04
280.00	20.60	603.68	4.46	8.20
280.00	25.40	601.21	4.64	8.89
280.00	31.30	598.31	4.82	9.57
315.00	23.20	764.02	4.73	8.70
315.00	28.60	760.90	4.92	9.43
315.00	35.20	757.25	5.11	10.15
355.00	26.10	970.41	5.02	9.23
355.00	32.20	966.43	5.23	10.01
355.00	39.70	961.76	5.43	10.78
400.00	29.40	1232.03	5.33	9.80
400.00	36.30	1226.95	5.55	10.62
400.00	44.70	1221.06	5.76	11.44

e_n/mm	q₁/N·m^-1	I/mm⁴	l_g/m	l_q2/m
8.50	61.7	1.33×10⁷	1.60×10⁵	3.47
9.80	71.8	1.57×10⁷	1.86×10⁵	3.60

1	孙训方，方孝淑，关来泰．材料力学（I）第四版 [M]．北京：高等教育出版社，2002：157⁃164．
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