The method of construction of the underground station deep under the surface

 

(57) Abstract:

The invention relates to underground construction, mainly for the construction of metro stations deep foundations. The method of construction housings of underground deep under the surface includes a preliminary excavation of the side and middle of the tunnels with the implementation supports them, then the driving of the lateral and middle tunnels otselic to trim supports, installation of lining tunnels with resting them on support and development of the soil in the tray part and its construction. Efficiency is achieved by drilling tunnels, which carry the support of the respectively monolithic beams and columns with the runs, and then perform cyclically driving the middle of the tunnel with the installation of the lining of having an internal cavity blocks that connect and concreted their cavity, and part of the flume station are made of monolithic slabs with the location of the tray portion of the side tunnels below the tray part of the middle of the tunnel. 2 Il.

The invention relates to underground construction, mainly for the construction of metro stations deep foundations.

A known method of construction of the column stations deep-laid design is Dziennik tunnels, mounting them lining, installation of the side tunnels columns and girders, the sinking of the middle station of the tunnel with the subsequent installation of its lining, disassembly tubing temporary filling [1]

The disadvantages of this method of construction of the stations is large, the intensity, and the need for manufacturing of shaped tubing that is used in the lining.

Closest to the present invention is a method of construction of the underground station, deep foundations, including pre-drilling of the tunnels with the execution of them supports for the arches of the side and middle of the tunnels, the driving side and the middle of the tunnel at the beginning of Selig to trim installed footings, installation of lining tunnels with resting on their supports, and then the subsequent development of soil to the bottom of the supports with the construction of the tray part of the station [2]

The disadvantages of this method of construction of the station is increased complexity and intensity when performing technological operations with the installation of the shaped tubing canted jumper, tubing temporary filling holes when drilling the lateral and middle tunnels, in the exercise of penetration openings with advanced dismantlement of temporary fill and p the mi tides and medium supports in the form of a bonded lower adjacent segment.

An object of the invention is to reduce labor costs and material consumption during the construction of the station.

The technical result is achieved by the fact that the average gallery develop with increased reduced cross-section relative to extreme and have their height above the latter, and bearing in extreme galleries are in the form of a monolithic beams, while in the medium in the form of columns with the runs and the support elements and set the pillars in the middle tunnels vraspor vertically with releasing their inventory spacers on the side of the tunnel, facing to the side tunnel, followed by a cyclical, the driving of the first medium, and then the side tunnels with their installation of the lining of having an internal cavity blocks that connect with each other, pump cement mortar for their external surface and then concreted internal cavity blocks benches, equal step columns, as part of the flume station made of a flat monolithic slabs with the location of the tray portion of the side tunnels below the tray part of the middle of the tunnel.

Work on this method of construction station allows you to provide mechanized tunneling and tunnels and to reduce the draught of s temporary filling and installation of the lining openings, that reduces consumption, and reduce labor costs in the construction of arches and reduce the total cost of the station is 10-15%

In Fig. 1 shows the penetration extreme and medium-sized tunnels, installation of supports (cross section) of Fig. 2 tunneling, installation of the lining and the construction of the tray portion (cross section).

Underground station includes two extreme 1 and two medium 2 galleries with supports for the arches, side 3 and secondary 4 tunnels with lining tray 5 and part 6, the supporting elements 7. At 1 tunnels mounted monolithic beams 8, and in the middle 2 columns 9 to 10 runs.

The method of construction of the station is as follows.

Spend the sinking of two extreme 1 adits, for example, mechanized tunnel boring machine (not shown) that provides a reasonably accurate processing (smoothness) of the walls of the tunnels, and the middle 2 tunnel slip up relatively far 1 of the tunnels and develop them with greater pass-section. At 1 tunnels carry out support in the form of monolithic beams 8, and in medium 2 galleries post supporting elements 7 and the bearings are in the form of columns 9 to 10 runs, then column 9 raskrepljajut removable spacers 11. ZAT what you cavity. The lining 5 of the blocks begin to mount, connecting them together in series, using special platforms (not shown). Then for their external surface of the pump rapid hardening mortar (cement) to ensure a snug fit lining 5 to the wall of the tunnel. Then concreted internal cavity blocks. When this control is provided for the complete filling of the gaps between the outer surface of the lining 5 and the wall, as well as the completeness of the filling when pouring the internal cavity of the blocks in the connection.

Then carried out cyclically (column spacing), the driving of the lateral 3 tunnels and installation of the lining 5 of the blocks with monolithic support beam 8 and column 9 with 10 runs, and the sequence of operations involved in the likeness of the installation of the lining 5 medium 4 of the tunnel. After installation of the lining 5 of the side tunnels removable spacers 11 is removed. The development of the soil in the tray part 6 start from the middle 4 of the tunnel and erect part of the flume station in the form of a monolithic plate 12, and then carry out the excavation and execution of monolithic slabs tray portion side 3 tunnels.

The method of construction of the underground station deep salaula, the driving side and the middle of the tunnel at the beginning of Selig to trim installed footings, installation of lining tunnels with resting on their supports, and then the subsequent development of soil to the bottom of the supports with the construction of the tray part of the station, characterized in that the average of the drifts will be developed with increased reduced cross-section relative to extreme and have their height above the latter, and bearing in extreme galleries are in the form of a monolithic beams, while in the medium in the form of columns with the runs and the support elements and set the pillars in the middle tunnels vraspor vertically with releasing their inventory spacers on the side of the tunnel, facing to the side tunnel, followed by a cyclical, the driving of the first medium, and then the side tunnels with their installation of the lining of having an internal cavity blocks that connect with each other, pump cement mortar for their external surface and then concreted internal cavity blocks benches, equal step columns, as part of the flume station made of a flat monolithic slabs with the location of the tray portion of the side tunnels below the tray part of the middle of the tunnel.

 

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FIELD: hydraulic structures, particularly for laying underwater pipelines.

SUBSTANCE: method involves transporting pipeline tunnel sections by water to pipeline laying site; submerging thereof; placing pipeline tunnel sections on underwater piers with the use of flexible ties; sealing pipeline tunnel sections. Tunnel sections have nearly zero floatability. Pipeline tunnel sections are submerged and put on piers by flexible ties. Then pipeline tunnel sections are pushed in docking unit of previous submerged section with the use of submarine and sealed from inside and outside along with connection of inner service lines. After finishing pipeline tunnel sections assemblage entry and exit tunnels are secured to pipeline tunnel. System for underwater pipeline tunnel sections assembling includes underwater pipeline tunnel mounted on underwater piers and formed of separate sections having design lengths. Pipeline tunnel sections are divided into two chambers by horizontal partition. Transport path is arranged in upper chamber. Lower section is divided into several cavities by air-tight partitions for laying inner pipelines. Underwater pipeline tunnel sections are formed of two thick-walled shells of steel plates or titanium alloy. Longitudinal partitions are mounted between shells and secured along perimeter thereof. Longitudinal partitions serve as pipelines and stiffening ribs. Pipeline tunnel sections are laid on underwater permanent and temporary piers. Upper pier parts have bases of semicircular or parabolic shape. Pier part dimensions exceed that of pipeline tunnel sections.

EFFECT: increased efficiency of pipeline laying and maintenance during multi-purpose usage thereof.

5 cl, 6 dwg

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