Underground water treatment method for underground excavation construction in compound stratum below existing building
A technology of existing buildings and composite strata, applied in the field of groundwater treatment, can solve problems such as poor feasibility, difficult coordination, and high demolition costs
Active Publication Date: 2020-10-20
徐州地铁集团有限公司 +1
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Problems solved by technology
Problems such as the huge cost of demolition of existing underground structures, difficulty in coordination, poor feasibility, etc.
Method used
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Embodiment 1
[0025] Pengcheng Square Station of Xuzhou Line 1 is an open-concealed excavation and separation island station, and part of the platform layer is an excavation and separation island type station. It is located directly below the existing fashion avenue, and is constructed using the CRD underground excavation method. Fashion Avenue is a business with one basement and some two floors, with a total construction area of more than 13,000 square meters, and most of the shops are owned by individuals; the underground commercial street of Fashion Avenue takes into account the crossing functions of the four quadrants at the intersection of Huaihai Road and Zhongshan Road. Located in the commercial center of Xuzhou City, the passenger flow is very large, and the coordination of demolition and relocation is extremely difficult. According to the conventional design, it is impossible to construct a dewatering well in the existing structure, and it is also impossible to set a dewatering we...
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The invention discloses an underground water treatment method for underground excavation construction in a compound stratum below an existing building. The underground water treatment method comprisesthe steps that (a) open cutting of a hall body structure is completed; (b) four sectional drainage pipes are uniformly driven into four quadrants of a CRD in an underground diaphragm wall, and one auxiliary sectional drainage pipe is arranged at the center; (c) the underground diaphragm wall is sequentially chiseled away part by part; (d) a primary support, a temporary vertical support and a temporary horizontal support of the underground diaphragm wall within the thickness range are constructed, and C25 early strength concrete is ejected in the erection process; (e) right and left lines aredrawn to conduct underground excavation of a large pipe shed of an arched part of a main tunnel, and water sacs on a soil-sock combination surface of the arch part are actively released; (f) groutingis conducted on the advanced large pipe shed, and grout is uniformly diffused into soil by means of small holes in the large pipe shed; and during construction in small holes of the CRD one by one, advanced small guide pipes are driven between pipe sheds for grouting. By the adoption of the underground water treatment method for the underground excavation construction in the combined stratum belowthe existing building, the construction cost is reduced, the construction process is accelerated, the construction period is shortened, and the difficult of arranging a precipitation well is overcome.
Description
technical field [0001] The invention relates to a groundwater treatment method for underground excavation construction in a compound stratum under an existing building, and belongs to the technical field of underground engineering. Background technique [0002] With the development of cities and the continuous accumulation of population to big cities, the building space in the city center is denser, and the traffic on the main road is more busy, which puts forward higher requirements for the construction of underground projects in the future. Problems such as the huge cost of demolition and relocation of existing underground structures, difficulty in coordination, and poor feasibility. Contents of the invention [0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a groundwater treatment method for underground excavation in complex strata under existing buildings. [0004] In order to achieve the above object, a kind of undergrou...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21D9/00E21D11/10E21F16/02E21D11/14E02D5/18
CPCE21D9/00E21D11/10E21F16/02E21D11/14E02D5/18
Inventor 姚西平张存胡清茂倪吉栋张国良王敦显翟可李龙王怀东梅展军杨晓猛李舸鹏孙浩徐小涛赵国智
Owner 徐州地铁集团有限公司