Construction method of foundation grouting for continuous steel structure aqueduct pier in rich water area
A construction method and aqueduct technology, applied in infrastructure engineering, construction, etc., can solve problems such as excessive water inflow and inability to construct, and achieve the effect of ensuring construction quality
Active Publication Date: 2019-09-13
2ND ENG CO LTD OF CHINA RAILWAY 12TH BUREAU GRP +1
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Problems solved by technology
[0003] In order to solve the problem that the pile gene that is close to the rich water source such as the reservoir is too large to cause construction, the invention further provides a continuous steel structure aqueduct pier foundation grouting construction method in the water-rich area
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[0032] like figure 1 As shown, the 1#, 5#, and 9# excavated piles are near-water piles, and the grouting holes are arranged in a single row; the hole spacing is 3.0m, and there are a total of 9 holes with a hole diameter of 91mm. The opening elevation of each grouting hole in the GG2# pier foundation is the existing ground, and the hole depth is 24m, of which the effective hole depth of a single hole is 15m, and the ineffective hole depth is 9m; the total hole depth is 216m, of which the effective hole is 135m, and the ineffective hole depth is 81m. The grouting is divided into two phases of construction, the first phase is 1#~3# holes, 7#~9# holes; the second phase is 4#~6# holes. Each phase of grouting is divided into three sequences of construction, the specific sequence see figure 1 .
[0033] Based on the principles of easy control of construction quality, proximity, convenience, and economy, and on the premise of ensuring construction needs and project completion on sc...
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The invention belongs to the technical field of construction for continuous steel-structure aqueducts, and aims at solving the problem that a pile foundation close to a reservoir and other water-rich sources cannot be constructed due to over-large water inflow. The invention provides a pier foundation grouting construction method for a continuous steel-structure aqueduct in a water-rich area. According to the pier foundation grouting construction method, the influence of the reservoir and other water-rich sources on excavated piles can be effectively solved by virtue of grouting holes, and the grouting holes are arranged around the excavated piles and along a water flow side of the aqueduct through a nine-hole single-row method, thus the construction progress of pile foundation holes of the aqueduct is ensured; and moreover, staging and sequencing construction is carried out on the grouting holes, and a grouting method capable of increasing a grout concentration and changing stage by stage is adopted during grouting, thus the construction quality of the grouting holes can be effectively ensured.
Description
technical field [0001] The invention belongs to the technical field of construction of continuous steel structure aqueducts, and in particular relates to a foundation grouting construction method for continuous steel structure aqueduct piers in water-rich areas. Background technique [0002] Because the depth of the pile foundation is generally large, it is necessary to use protective tubes and other devices to do a good job of waterproofing and anti-sand surge pretreatment during the excavation process. However, for some pile foundations that are close to rich water sources, during the construction of excavated piles, conventional steel casing devices cannot prevent and solve large water inrush accidents, which may cause the pile foundation to fail to continue construction, affect the construction progress, and even cause safety accidents. For example, the main pier of Xujiawan Aqueduct GG2# is 92m high, and the foundation is a pile cap structure. The pier has a total of 12...
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IPC IPC(8): E02D15/02
Inventor 张玉民杜强范廉明武明静赵香萍黄亮李晓徐海龙沙金贵
Owner 2ND ENG CO LTD OF CHINA RAILWAY 12TH BUREAU GRP