| The domestic make use of shallow cover up dark dig a method to build to greatly across one degree subway station, generally adopt currently of the method have: Medium hole method, the side hole method and hole pillar method, its structure form's much three arches is two pillars. Experience successively the test detection of fulfillment now, this kind of traditionally builds a method, is hand over by three arch form structure to match composing because of the its first time structure pattern, discover in the movement that it remit waterproof problem of hand over the part more and more become influence normal luck camp of key problem. "Soft land layer railroad station the bottom of the field be greatly shallow to cover up to across an underground comprehensive technique of the passage construction" directly to tunnel crosses the compressibility Gao, the strength low soft land layer and ground a current railroad station a field, for promise that the tunnel is dark to dig under construction railroad train of normal luck camp and railroad station of normal usage but successfully carry on of series of engineering fulfillment and obtain result, promised a current ground building not Sun, don't split with normally carry on of the railroad passenger transportation, freight transportation business, promised a railroad aorta of unimpeded, kept a good environment condition. Avoid because the railroad train stops luck and underground pipeline to move but augmentative engineering cost, brought engineering construction to show the economic performance of Zhao. Also pushed the technical progress of the tunnel construction in the meantime, for should grow underground engineering construction under the bad environment condition provided successful experience.Along with the development of city municipal services tunnel, subway and underground engineering construction, the tunnel construction inevitably meets bad geologic strata and crosses railroad and important and current building in the ground, so the item's result have extensive of applied foreground.This text is totally divided into four the parts carry on a research:Chapter 1 is an introduction part, mainly point out a domestic and international research a development present condition, this text draws up research contents.Chapter 2 total construction project and work method are excellent to turn. Excellent turn result first in affirmation big tube the Peng assist to run before to prepay to protect by small pipe under the condition adopt side hole method construction of the foundation select choose and adopted a wreath form to open to dig to reserve the core native method, 0.5 ms short circulation into the Chinese foot, space grid arch, note syrup to lock feet anchor man a tube, reinforcing bar net. Spray concrete consociation to protect system and temporary Yang arch, the Zhang son noodles sprays concrete to close, pay to protect back to fill to note syrup's etc. at the time comprehensive construction measure. built up a railroad station a field environment to descend a construction earth's surface to sink to decline a control standard. This research with《building foundation design norm》and《the railroad circuit maintain rule》and relevant underground pipeline usage, maintain etc. technique index sign and research result for foundation, pass to the orbit, ground and the underground construct(structure) a thing to allow geologic strata to change a statistics of analysis, and combine characteristics and construction earth's surface of this engineering to sink to decline regulation, made sure a railroad station a field the earth's surface which descend the construction stage of the tunnel dissimilarity sink decline control value, became to cross a railroad station a field shallow cover up dark dig greatly across a tunnel construction an earth's surface to sink to decline control standard really settle a method.Chapter 3 the Construction Monitering Technique Shu well and Ma3 Tou2 Men2 start construction. Under construction, the south Shu well adoption drills a hole to infuse to note a stake to round to protect structure, the north Shu well adoption sprays an anchor man protect a form of round and protect structure. Under construction and south Shu well normal regulations method of Ma3 Tou2 Men2 after the Shu tidy body carry on two molds to build reinforced concrete Chen to carve to strengthen, is again carry on Ma3 Tou2 Men2 openings, in consideration of the Shu well is structural of temporary and two Chen molds build concrete work a period longer, at under construction adopt big tube Peng and stake body reinforcing bar conjunction the formation strengthen a wreath frame after open mouth again of the method obtain success; North Shu well the normal regulations top Shu tidy body carries on two molds to build the concrete Chen is after carve strengthen carry on the openings of Ma3 Tou2 Men2, in consideration of the Shu well protects a mural structure form and reserve the technique measure that Ma3 Tou2 Men2 open mouth in the under construction adoption and obtain success. powder quality glues soil and glue a soil layer empty water and the crack Xi water construction to decline water technique. Because of special with water layer, press in the interference wells the calculation small permeate not- complete wells of the diving interference of coefficient, small influence radius to consider. Press another calculation theories of the normal regulations interference wells, the well orders system to flow out amount of water to consider according to etc., and each well flow out amount of water not to wait. Aim at the above-mentioned characteristics, the principle sets out from the groundwater dynamics and put forward powder quality to glue soil and glue the soil empty water, crack Xi water decline water etc. the small influence radius of the price dive the interference not- complete wells stability flow a construction method. runs before to prepay to protect a technique. Take care of the Peng presses to in advance lay a good direction a tube position to carry on a construction. tunnel opens to dig and pays to protect a construction technique. Under construction follow the principle of "the tube run before, strict note syrup, short open to dig, the strong protect, quick close, frequently measurement", valid control the sink of earth's surface decline and insure engineering structure and ground building of safety, stability. The choice of construction method and assistance work method, according to different actual circumstance assurance of the district, ground building...etc., all need to be satisfy to sink the control request for decline to the earth's surface. circuit buttons up a track to reinforce, divide to expect whole and outside moderate a safe technique inside hole. Sink to decline monitor in the tight earth's surface, the circuit button up a track to reinforce and separately expect the whole technique measure to promise under, in order to raise a railroad train luck the safety degree of the camp, according to underground passage construction progress, adjust a station field positive line and arrive hair line, make station field line always don't open to dig construction block in the tunnel, namely positive line adjust at open to dig noodles before or the tunnel paid cover to shut after block, the real meaning carry out absolute safety, guarantee complete success. synthesizes a waterproof technique. The waterproof engineering pierces through at the whole processes of construction, is the key which controls engineering quality. The success or failure of the waterproof work is an evaluation to the structure quality, so have to the enlargement strength make a good water tightness work. The waterproof grade of tunnel settle for second class, the structure disallows to have a leak, the structure surface can have a little amount of wet Zi, total the wet Zi area is no bigger than 6‰s of always waterproof area, arbitrarily 100 ms the wet Zi of 2 waterproof areas not more than 4, single the biggest area of the wet Zi not over 0.2 ms 2.Design for dual all close water tightness, first floor's ising the waterproof book material that the continuous body close is a structure outside layer water tightness, second floor is the structure is from the water tightness.Chapter 4 conclusion and prospect. The above-mentioned research work of open an exhibition, all make breakthrough progress, and acquired a homologous item research a result, not only give the engineering construction with powerful technique support, can make the engineering successfully succeed, and became "soft land layer railroad station the bottom of the field be shallow to cover up greatly across an underground passage construction comprehensive technique" a research a result, can is similar to engineering to provide experience and draw lessons from for aftertime. |
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