SU969900A1

SU969900A1 - Method of erecting prestressed tunnel lining

Info

Publication number: SU969900A1
Application number: SU813270744A
Authority: SU
Inventors: Александр Семенович Николаев; Анатолий Георгиевич Миньков; Николай Иванович Зиневич; Ильяс Пшатаев
Priority date: 1981-04-07
Filing date: 1981-04-07
Publication date: 1982-10-30

Description

Известен способ возведени преднапр жений обделки, включающий возведение наружного кольца из монолитного бетона и внутреннего кольца из сборных элементов с оставлением кольцевого зазора между ними, с последующим нагнетанием в зазор цементного раствора под давлением Cl.There is a known method of raising prestresses of the lining, which includes the erection of an outer ring of monolithic concrete and an inner ring of prefabricated elements, leaving an annular gap between them, followed by injection of cement mortar under the pressure Cl.

Недостатком указанного способа вл ютс большие трудозатраты в св зи с заделкой швов между сборными элементами дл предотвращени вытекани цементного раствора.The disadvantage of this method is the high labor costs in connection with the sealing of joints between the prefabricated elements to prevent the cement slurry from flowing out.

Известен также способ возведени преднапр женной обделки, включающий возведение наружного и внутреннего колец Сбделки с кольцевым зазором между ними и нагнетание в зазор цементного раствора под давлением t23.There is also known a method for the construction of a prestressed lining, including the construction of the outer and inner rings with an annular gap between them and the injection of cement mortar under pressure t23 into the gap.

Недостатками известного способа , вл ютс трудоемкость и недостаточна надежность креплени .The disadvantages of this method are the complexity and lack of reliability of fastening.

Цель изобретени - повышение уровн механизации работ и удешевление строительства.The purpose of the invention is to increase the level of mechanization of work and reduce the cost of construction.

Поставленна цель достигаетс тем, что согласие способу между наружным кольцом обделки из сборных блоков и внутренним монолитным кольцом обделки кольце ой зазор образуют посредством укладки по контуру внутренней поверхности наружного кольца рулонного проницаемого дл раствора материала, причем рулонный материал укладывают с промежутками, кото1 де заполн ют бетоном в процессе последующего бетонировани внутреннего кольца обделки.The goal is achieved by the fact that the agreement between the outer ring of the lining of the prefabricated blocks and the inner monolithic ring of the lining of the ring is formed by laying along the contour of the inner surface of the outer ring of the roll material permeable to the mortar, and the roll material is laid at intervals, which are filled with concrete during the subsequent concreting of the inner ring of the lining.

В качестве проницаемого дл раст10 вора материала используют сетку, обт нутую пленкой.A mesh covered with a film is used as a material permeable to a thief.

На фиг.1 изображен туннель, разрез по готовой обделке; на фиг.2 монтаж рулонного материала; на Figure 1 shows the tunnel, the cut on the finished lining; in Fig.2 mounting roll material; on

15 фиг.З и 4 - элементы обделки в более детальном исполнении.15 fig.Z and 4 - lining elements in more detailed execution.

Возведение преднапр женной обделки производ т следующим образом.The construction of the prestressed lining is performed as follows.

В качестве наружного илравниваюг As an outdoor illumination

20 щего кольца обделки используют временную крепь из сборных блоков 1, устанавливаемую в процессе проходки туннел в породном массиве 2 с помощью механизированного щита (не The 20 lining rings use temporary lining from prefabricated blocks 1, which is installed during the tunneling process in the rock mass 2 using a mechanized shield (not

25 показан).25 is shown).

Затем дл образовани кольцевого зазора монтируют рулонный материал 3 с помощью установки 4, включгиощей барабан 5с водилом 6 и роликом 7. Then, to form an annular gap, roll material 3 is mounted using installation 4, including drum 5c with carrier 6 and roller 7.

Claims

30 To keep the web material 3 in its design position, it is shot as needed with an dowel Mv 8. After that, the inner monolithic lining ring 9 is erected using a mechanized installation (not shown). After the concrete has gained the required strength through the holes 10 left in the body of the inner ring of the lining 9 into the gap formed by the coiled material under pressure, the cement mortar is pumped into the arrow of K. With the help of the pressure of the liquid cement mortar on the inner ring of the lining 9 relative to the outer ring from the prefabricated blocks supported in the rock mass 1, in the inner ring of the lining 9 there are compressive stresses necessary for the prestressing of the lining. The application of the proposed method allows to reduce the cost of work and reduce the time needed for the construction of the lining. Claim 1. A method of erecting a pre-stressed tunnel lining, including the erection of the outer and inner lining rings with an annular gap between them and the injection of cement mortar under pressure into the Sazor, characterized in that, in order to increase the level of mechanization of work and reduce the cost of construction, the annular gap between the outer and inner rings of the lining are formed by laying along the contour of the inner surface of the outer ring of the lining of the bulk roll permeable to the material, and ulonny material placed gap which .zapoln with concrete during subsequent concreting of the inner ring finishes. 2. Method POP.1, characterized in that a mesh covered with a film is used as a material permeable to a solution. Sources of information taken into account in the examination 1. Zurabov GG, Bugaeva O.E. Hydrotechnical tunnels of hydroelectric stations. M.-L., 1962, pp.203-209.

2. USSR author's certificate number 620616, cl. E 21 D 11/00, 1976.

J $ 5

FIG. /