广西大学学报（自然科学版）
廣西大學學報（自然科學版）
엄서대학학보（자연과학판）
JOURNAL OF GUANGXI UNIVERSITY （NATURAL SCIENCE EDITION）
2014年
2期
237-244
,共8页
不均匀侧压%井壁结构%厚径比%受力机理%叠加原理
不均勻側壓%井壁結構%厚徑比%受力機理%疊加原理
불균균측압%정벽결구%후경비%수력궤리%첩가원리
non-uniform lateral pressure%shaft lining%thickness to diameter ratio%mechanical be-havior%superposition principle
为探明深部围岩压力作用下混凝土井壁的受力特征，将井筒周围不均匀侧压力分为均布荷载和非均布荷载两部分，利用叠加原理将两者对井筒受力的影响相加，获得井壁受力公式，并通过分析不同厚径比和不均匀侧压系数条件下井壁不同位置和极值点的受力变化，揭示了厚径比和不均匀侧压系数对井壁受力的影响规律，提出了相应的不均匀侧压条件下井壁结构设计计算的主要原则和程序，其可靠性得到了实际工程的检验。研究结果表明：不均匀侧压条件下井壁结构受力差异悬殊，且存在受力极值点；厚径比和不均匀侧压系数对井壁结构受力性质与大小影响很大，厚径比过小或不均匀侧压系数较大，均会导致极值点处出现拉应力；厚径比大于0.2时平衡井壁受力的效果才明显。实践表明，依据不出现拉应力和满足强度需求的原则确定井壁结构和材料的方法是合理可靠的。
為探明深部圍巖壓力作用下混凝土井壁的受力特徵，將井筒週圍不均勻側壓力分為均佈荷載和非均佈荷載兩部分，利用疊加原理將兩者對井筒受力的影響相加，穫得井壁受力公式，併通過分析不同厚徑比和不均勻側壓繫數條件下井壁不同位置和極值點的受力變化，揭示瞭厚徑比和不均勻側壓繫數對井壁受力的影響規律，提齣瞭相應的不均勻側壓條件下井壁結構設計計算的主要原則和程序，其可靠性得到瞭實際工程的檢驗。研究結果錶明：不均勻側壓條件下井壁結構受力差異懸殊，且存在受力極值點；厚徑比和不均勻側壓繫數對井壁結構受力性質與大小影響很大，厚徑比過小或不均勻側壓繫數較大，均會導緻極值點處齣現拉應力；厚徑比大于0.2時平衡井壁受力的效果纔明顯。實踐錶明，依據不齣現拉應力和滿足彊度需求的原則確定井壁結構和材料的方法是閤理可靠的。
위탐명심부위암압력작용하혼응토정벽적수력특정，장정통주위불균균측압력분위균포하재화비균포하재량부분，이용첩가원리장량자대정통수력적영향상가，획득정벽수력공식，병통과분석불동후경비화불균균측압계수조건하정벽불동위치화겁치점적수력변화，게시료후경비화불균균측압계수대정벽수력적영향규률，제출료상응적불균균측압조건하정벽결구설계계산적주요원칙화정서，기가고성득도료실제공정적검험。연구결과표명：불균균측압조건하정벽결구수력차이현수，차존재수력겁치점；후경비화불균균측압계수대정벽결구수력성질여대소영향흔대，후경비과소혹불균균측압계수교대，균회도치겁치점처출현랍응력；후경비대우0.2시평형정벽수력적효과재명현。실천표명，의거불출현랍응력화만족강도수구적원칙학정정벽결구화재료적방법시합리가고적。
In order to find out the mechanical characteristics of concrete shaft lining under the action of deep surrounding rock, the lateral pressure around the shaft is divided into uniformly and non-uni-formly distributed loads, and the influences of the loads are superposed. The influences of thickness to diameter ratio and coefficient of non-uniform lateral pressure on the sidewall stress is revealed by the change of stress at different location and extreme point under different thickness to diameter ratio and coefficient of non-uniform lateral pressure. The main principles and procedures for the design and calculation of shaft lining under non-uniform lateral pressure was derived, and the reliability was verified by a practical engineering project. The results showed that the difference between stresses at different location of shaft-lining under non-uniform lateral pressure was great, and some extreme points could be found. The ratio of thickness to diameter and coefficient of non-homogeneous lateral pressure have a great influence on the mechanical properties of the structure and its size. A too small ratio of thickness to diameter or a large coefficient of lateral pressure can lead to tensile stress at the extreme points, and good balance between stresses of different parts can be observed when the thick-ness to diameter ratio is larger than 0.2 . The practice has proved that the method to determine the structure and material of shaft lining according to the principle of no tensile stress and enough inten-sity is reasonable and reliable.
