软岩隧洞约束混凝土箱型钢拱架支护承载特性

doi:10.11988/ckyyb.20241166

raybet体育在线院报 ›› 2025, Vol. 42 ›› Issue (2): 1-8.DOI: 10.11988/ckyyb.20241166

软岩隧洞约束混凝土箱型钢拱架支护承载特性

黄书岭(), 王祥祥

¹ raybet体育在线水利部岩土力学与工程重点实验室,武汉430010

收稿日期:2024-11-15 修回日期:2024-12-12 出版日期:2025-02-01 发布日期:2025-02-01
作者简介:
黄书岭(1978-),男,河南方城人,正高级工程师,博士,主要从事水工岩体灾变预测和防控技术及工程应用方面的研究工作。E-mail:huangsl@mail.crsri.cn
基金资助:
国家自然科学基金重点项目(U2340229); 国家自然科学基金青年项目(52409124); 中央级公益性科研院所基本科研业务费项目(CKSF2024329/YT)

Bearing Characteristics of Confined Concrete Box Steel Arch in Soft Rock Tunnel

HUANG Shu-ling(), WANG Xiang-xiang

¹ Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Changjiang River Scientific Research Institute, Wuhan430010, China

Received:2024-11-15 Revised:2024-12-12 Published:2025-02-01 Online:2025-02-01

摘要/Abstract

摘要：

约束混凝土箱型钢拱架是箱型钢和核心混凝土形成的组合拱架结构,也是有效控制软岩隧洞变形的一种新型支护形式,目前尚缺少关于这类拱架承载特性的研究工作。为此,推导了约束混凝土箱型截面压弯屈服判据,分析了该类型拱架的强度极限承载力和结构稳定极限承载力,同时对比了约束混凝土箱型钢拱架、H型钢拱架、箱型钢拱架3种类型拱架的承载特性。研究结果表明:约束混凝土箱型钢拱架截面屈服判据值在同型号中最高,其轴压屈服强度极限平均为箱型截面的1.4倍、H型钢截面的2.2倍,纯弯屈服强度极限平均为箱型截面的1.1倍、H型钢截面的1.5倍;约束混凝土箱型钢拱架强度和结构稳定极限承载力均高于同型号箱型和H型钢拱架,强度极限承载力是箱型钢拱架的1.3~1.4倍、H型钢拱架的2.2~2.3倍;结构稳定极限承载力是箱型钢拱架的1.03~1.04倍、H型钢拱架的1.10~1.27倍。约束混凝土箱型钢拱架承载特性优势显著,能够为软岩隧洞提供更为可靠和高效的支护。

关键词: 软岩隧洞, 约束混凝土箱型钢拱架, 压弯屈服判据, 强度极限承载力, 结构稳定极限承载力

Abstract:

Confined concrete box steel arch is a composite arch structure comprising box steel and core concrete. It is a novel support form designed to effectively control deformation in soft rock tunnels. Currently, there is limited research on the bearing characteristics of this arch type. In view of this, a compression-bending yield criterion for confined concrete box section is deduced, and the ultimate bearing capacities for strength and structural stability are analyzed respectively. Furthermore, the bearing characteristics of three arch types: confined concrete box steel arch, H-type steel arch, and box steel arch, are compared. Results indicate that the yield criterion value for the confined concrete box steel arch section is the highest among the types considered. Specifically, its axial compression yield limit is 1.4 times that of the box type and 2.2 times that of the H-type. Moreover, the pure bending yield limit is 1.1 times that of the box type and 1.5 times that of the H-type. The strength and ultimate bearing capacity of confined concrete box steel arch surpass those of the box type and H-type steel arches. The ultimate bearing capacity for strength is 1.3-1.4 times that of the box steel arch and 2.2-2.3 times that of the H-type steel arch. The ultimate bearing capacity for structural stability is 1.03-1.04 times that of the box steel arch and 1.10-1.27 times that of the H-type steel arch. Consequently, the confined concrete box steel arch exhibits significant advantages in load-bearing characteristics and can provide reliable and efficient support in soft rock tunnels.

Key words: soft rock tunnel, confined concrete box steel arch, compression-bending yield criterion, strength resistant capability, ultimate bearing capacity of structure stability

黄书岭, 王祥祥. 软岩隧洞约束混凝土箱型钢拱架支护承载特性[J]. raybet体育在线院报, 2025, 42(2): 1-8.

HUANG Shu-ling, WANG Xiang-xiang. Bearing Characteristics of Confined Concrete Box Steel Arch in Soft Rock Tunnel[J]. Journal of Changjiang River Scientific Research Institute, 2025, 42(2): 1-8.

图/表 7

图1 软岩隧洞约束混凝土箱型钢拱架示意图

Fig.1Sche matic diagram of confined concrete box steel arch in soft rock tunnel

图2 拱架力学分析模型

Fig.2Mech anical analysis model of arch

图3 约束混凝土箱型截面

Fig.3Sect ion drawing of confined concrete box

表1 不同截面压弯屈服判据统计(钢材取Q235,混凝土取C40)

Table 1 Statistics of compression-bending yield criterion of different sections (Q235 for steel and C40 for concrete)

截面类型	型号	截面压弯屈服判据	N_u/kN	M_u/(kN·m)
约束混凝土箱型截面	150	$1.5290 n 2 - 0.3921 n + m = 1, n < 0.6574 0.3632 n 2 + 1.1405 n + m - 0.5037 = 1, n ≥ 0.6574$	2 058	83
	175	$1.5986 n 2 - 0.4513 n + m = 1, n < 0.6571 0.3458 n 2 + 1.1951 n + m - 0.5409 = 1, n ≥ 0.6571$	2 638	122
	200	$1.6622 n 2 - 0.5055 n + m = 1, n < 0.6566 0.3331 n 2 + 1.2400 n + m - 0.5731 = 1, n ≥ 0.6566$	3 285	172
箱型截面	150	$1.2109 n 2 + m = 1, n < 0.5392 0.2180 n 2 + 1.0707 n + m - 0.2886 = 1, n ≥ 0.5392$	1 530	76
	175	$1.2383 n 2 + m = 1, n < 0.5222 0.1946 n 2 + 1.0900 n + m - 0.2846 = 1, n ≥ 0.5222$	1 893	112
	200	$1.2648 n 2 + m = 1, n < 0.5066 0.1771 n 2 + 1.1021 n + m - 0.2791 = 1, n ≥ 0.5066$	2 286	157
型钢截面	H150型钢	$2.2791 n 2 + m = 1, n ≤ 0.2327 0.1064 n 2 + 1.0113 n + m - 0.1177 = 1, n > 0.2327$	919	56
	H175型钢	$2.3151 n 2 + m = 1, n ≤ 0.2296 0.0992 n 2 + 1.0176 n + m - 0.1168 = 1, n > 0.2296$	1 174	85
	H200型钢	$2.3470 n 2 + m = 1, n ≤ 0.2268 0.0939 n 2 + 1.0220 n + m - 0.1159 = 1, n > 0.2268$	1 459	121

表1 不同截面压弯屈服判据统计(钢材取Q235,混凝土取C40)

Table 1 Statistics of compression-bending yield criterion of different sections (Q235 for steel and C40 for concrete)

截面类型	型号	截面压弯屈服判据	N_u/kN	M_u/(kN·m)
约束混凝土箱型截面	150	$1.5290 n 2 - 0.3921 n + m = 1, n < 0.6574 0.3632 n 2 + 1.1405 n + m - 0.5037 = 1, n ≥ 0.6574$	2 058	83
	175	$1.5986 n 2 - 0.4513 n + m = 1, n < 0.6571 0.3458 n 2 + 1.1951 n + m - 0.5409 = 1, n ≥ 0.6571$	2 638	122
	200	$1.6622 n 2 - 0.5055 n + m = 1, n < 0.6566 0.3331 n 2 + 1.2400 n + m - 0.5731 = 1, n ≥ 0.6566$	3 285	172
箱型截面	150	$1.2109 n 2 + m = 1, n < 0.5392 0.2180 n 2 + 1.0707 n + m - 0.2886 = 1, n ≥ 0.5392$	1 530	76
	175	$1.2383 n 2 + m = 1, n < 0.5222 0.1946 n 2 + 1.0900 n + m - 0.2846 = 1, n ≥ 0.5222$	1 893	112
	200	$1.2648 n 2 + m = 1, n < 0.5066 0.1771 n 2 + 1.1021 n + m - 0.2791 = 1, n ≥ 0.5066$	2 286	157
型钢截面	H150型钢	$2.2791 n 2 + m = 1, n ≤ 0.2327 0.1064 n 2 + 1.0113 n + m - 0.1177 = 1, n > 0.2327$	919	56
	H175型钢	$2.3151 n 2 + m = 1, n ≤ 0.2296 0.0992 n 2 + 1.0176 n + m - 0.1168 = 1, n > 0.2296$	1 174	85
	H200型钢	$2.3470 n 2 + m = 1, n ≤ 0.2268 0.0939 n 2 + 1.0220 n + m - 0.1159 = 1, n > 0.2268$	1 459	121

图4 不同截面m-n曲线

Fig.4The m-n curves of different sections

图5 不同类型钢拱架强度极限承载力

Fig.5Stre ngth resistant capacity of different types of steel arch

图6 不同类型钢拱架结构稳定极限承载力

Fig.6Ulti mate bearing capacity of structure stability of different types of steel arch

软岩隧洞约束混凝土箱型钢拱架支护承载特性

Bearing Characteristics of Confined Concrete Box Steel Arch in Soft Rock Tunnel

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