DISTRIBUTED PRESSURE-GROUTING DEVICE AND METHOD FOR BRIDGE APPROACH PILE FOUNDATION

WIPO Patent Application WO/2023/237133

A1

A distributed pressure-grouting device and method for a bridge approach pile foundation. The device comprises a pressure-grouting pipe, grout outlet valves, and a grout stop valve. The grout stop valve comprises a grouting pipe and a pressure-charging pipe, wherein one end of the grouting pipe is connected to a grouting pump by means of a grout supply pipe, and the other end thereof is a closed end; the middle of the grouting pipe is provided with a grout outlet; and the two ends of the grouting pipe are respectively sleeved with balloons, the balloons positioned at the two ends of the grouting pipe are connected in series by means of the pressure-charging pipe, and the two balloons respectively seal two sides of one grout outlet valve, so that the grouting pipe, the grout outlet, and the corresponding grout outlet valve form a grouting channel. Independent grouting can be carried out for different grout outlet valves by means of providing the grout stop valve, thereby ensuring the grouting effect and improving the anti-settlement performance of a pile body after grouting.

ZHANG GUANGYU (CN)
ZHENG LVJUN (CN)
GONG ZHUO (CN)
MU LIN (CN)
WEI LU (CN)
HU ZHUKUI (CN)
WEI ZHIYUAN (CN)
DU YU (CN)

PCT/CN2023/110673

December 14, 2023

August 02, 2023

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CHINA RAILWAY FOURTH BUREAU GROUP CO LTD (CN)
CHINA RAILWAY FOURTH BUREAU GROUP FIRST ENG CO LTD (CN)

E02D15/04; E02D5/34; E02D5/62

CN112459072A	2021-03-09
CN103866762A	2014-06-18
CN111535302A	2020-08-14
CN115928737A	2023-04-07
CN106013134A	2016-10-12
JP2014095252A	2014-05-22
CN212582651U	2021-02-23

BEIJING HECHUANG ZHIXIN PATENT AGENCY CO., LTD (CN)

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