CN-117364743-B - Underground diaphragm wall structure and construction method thereof

CN117364743BCN 117364743 BCN117364743 BCN 117364743BCN-117364743-B

Abstract

The application discloses an underground diaphragm wall structure and a construction method thereof, relating to the technical field of foundation engineering, comprising a reinforcement cage and joints, wherein the joints are arranged on two opposite sides of the reinforcement cage; the connector comprises a first partition plate, a second partition plate, a plugging plate, a driving assembly and a sealing assembly, wherein the first partition plate is abutted against a reinforcement cage, the width of the first partition plate is larger than that of the reinforcement cage, the first partition plate is symmetrically arranged and respectively arranged at two opposite ends of the second partition plate, a connecting cavity extending along the vertical direction is formed on one side of the first partition plate, away from the second partition plate, of the plugging plate, the plugging plate is hinged to the first partition plate and located in the connecting cavity, the driving assembly is arranged on the first partition plate, the driving assembly drives the plugging plate to overturn to abut against the groove wall of the groove section, the sealing assembly is arranged on the first partition plate, and when the plugging plate overturns towards the outside of the connecting cavity, the sealing assembly seals a gap between the plugging plate and the cavity wall of the connecting cavity. The application can reduce the possibility of the concrete penetrating back to the I-steel.

Inventors

WU LONGSHAN
LIANG HAILIN
DAI RUIPING
TU MINJIE
ZHANG HENGCHUN
CHEN CONGMING

Assignees

中建海峡建设发展有限公司

Dates

Publication Date: 20260505
Application Date: 20231124

Claims (5)

1. An underground diaphragm wall structure is characterized by comprising The steel reinforcement cage (1) and the connectors are arranged on two opposite sides of the steel reinforcement cage (1); The connector comprises a first partition plate (2), a second partition plate (3), a plugging plate (4), a driving assembly and a sealing assembly (5); The second partition plate (3) is abutted against the reinforcement cage (1), and the width of the second partition plate (3) is larger than that of the reinforcement cage (1); The first partition plates (2) are symmetrically arranged and are respectively positioned at two opposite ends of the second partition plate (3), a connecting cavity (21) extending along the vertical direction is formed on one side, away from the second partition plate (3), of the first partition plate (2), and the plugging plate (4) is hinged to the first partition plate (2) and is positioned in the connecting cavity (21); The driving assembly is arranged on the first partition board (2), and drives the plugging plate (4) to overturn to be abutted against the groove wall of the groove section; the sealing component (5) is arranged on the first partition board (2), and when the plugging board (4) turns outwards of the connecting cavity (21), the sealing component (5) seals a cavity wall gap between the plugging board (4) and the connecting cavity (21); the driving assembly comprises a driving column (62), a rotating shaft (61), a driving belt (6), a power column (63), a driving gear (64), a transmission gear (65), a transmission column (66), a driving rack (67) and a power gear (68); The first partition plate (2) is provided with a driving groove (22) communicated with the connecting cavity (21), and the driving column (62) is arranged in the driving groove (22) in a sliding manner; The rotating shaft (61) is rotatably connected to the first partition plate (2) and is coaxially arranged with the driving column (62), the driving column (62) is in threaded connection with the rotating shaft (61), and the driving gear (64) is arranged on the outer periphery side of the rotating shaft (61); The first partition plate (2) is provided with a limiting block (23), and a limiting groove (621) extending along the axial direction of the limiting block (23) is formed on the outer peripheral side of the driving column (62); the first partition plate (2) is provided with a power groove (24) positioned at one side far away from the hinge point of the plugging plate (4), and the power column (63) slides up and down on the power groove (24); The transmission column (66) is rotationally connected to the first partition board (2) and is parallel to the rotating shaft (61), the power gear (68) is rotationally connected to the first partition board (2), and the power gear (68) is arranged on the outer peripheral side of the transmission column (66) and protrudes into the power groove (24); The driving rack (67) is arranged on the outer peripheral side of the power column (63) along the vertical direction, and the driving rack (67) is meshed with the power gear (68); The transmission gear (65) is rotatably connected to the first partition plate (2) and arranged on the outer peripheral side of the transmission column (66), and the driving belt (6) is connected end to end and sleeved on the driving gear (64) and the outer peripheral side of the transmission gear (65); When the power column (63) slides into the power groove (24), the driving column (62) protrudes into the connecting cavity (21) and pushes the plugging plate (4) to turn over outwards of the connecting cavity (21); the driving gear (64) is rotationally connected with the rotating shaft (61); a mounting groove (611) is formed on the outer peripheral side of the rotating shaft (61) along the circumferential direction, supporting teeth (613) are uniformly arranged in the mounting groove (611) along the circumferential direction, and sliding teeth (641) are arranged on the inner peripheral side wall of the driving gear (64); When the power column (63) slides into the power groove (24) and the plugging plate (4) turns over towards the outside of the connecting cavity (21), the sliding teeth (641) are abutted against the supporting teeth (613) and drive the rotating shaft (61) to rotate; when the power column (63) slides into the power groove (24) and the plugging plate (4) stops turning, the sliding teeth (641) slide on the supporting teeth (613); the first separator (2) is formed with The power groove (24) is symmetrically provided with fixing grooves (25), and the connecting cavity (21) is positioned between the power groove (24) and the fixing grooves (25); The first partition plate (2) is provided with a fixing column (26) which slides up and down in the fixing groove (25), a fixing rope (7) is arranged between the fixing column (26) and the power column (63), and the first partition plate (2) is provided with a sliding hole (29) for the fixing rope (7) to slide up and down.
2. An underground diaphragm wall structure according to claim 1, wherein the first partition plate (2) is rotatably connected with a connecting shaft (27) positioned in the connecting cavity (21), and the plugging plate (4) is arranged on the connecting shaft (27); the connecting shaft (27) is sleeved with a torsion spring (28) at the periphery, and the torsion spring (28) drives the plugging plate (4) to turn into the connecting cavity (21).
3. An underground diaphragm wall structure according to claim 2, wherein an abutting plate (41) of an arc structure is arranged at one end of the plugging plate (4) far away from the connecting shaft (27), the arc concave side of the abutting plate (41) faces the cavity opening of the connecting cavity (21), and the abutting plate (41) is inserted into the groove wall of the groove section.
4. A diaphragm wall structure according to claim 3, wherein said seal assembly (5) comprises a seal plate (51), a seal block (52), a slider (53) and a push spring (54); the sealing plate (51) is arranged on one side of the plugging plate (4) away from the abutting plate (41); The sliding block (53) slides in the connecting cavity (21) far away from the cavity opening side cavity wall, the sealing block (52) is arranged on the sliding block (53), the pushing spring (54) is arranged on the first partition plate (2), and the pushing spring (54) pushes the sliding block (53) towards the side far away from the plugging plate (4); When the plugging plate (4) turns outwards of the connecting cavity (21), the sealing plate (51) abuts against the sealing block (52) and pushes the sliding block (53) to squeeze the pushing spring (54).
5. A construction method of an underground diaphragm wall structure employing an underground diaphragm wall structure according to any one of claims 1 to 4, comprising the steps of: S1, pouring guide walls; s2, excavating a groove section; S3, placing two connectors at two ends of the groove section, symmetrically arranging the two connectors, then placing a reinforcement cage (1) between the two connectors, driving a plugging plate (4) to be turned outwards to be abutted against the groove section, realizing sealing through a sealing assembly (5), and pouring concrete; And S4, after the previous underground wall is solidified and formed, continuing to construct the underground wall of each subsequent section, wherein the joints of the underground wall of the next adjacent section and the joints of the underground wall of the previous adjacent section are arranged in an array.

Description

Underground diaphragm wall structure and construction method thereof Technical Field The application relates to the technical field of foundation engineering, in particular to an underground diaphragm wall structure and a construction method thereof. Background Underground diaphragm wall, also called underground wall, is a retaining structure for foundation engineering and underground structural engineering, which can bear large lateral earth pressure and act as a retaining wall. In order to reduce the possibility of collapse during excavation of a foundation pit, a retaining structure is usually constructed before excavation, and an underground diaphragm wall is a common foundation pit retaining structure. When the underground diaphragm wall is constructed, a guide wall is usually cast on the ground, then the groove sections are cut in sections, and the underground diaphragm wall is formed by section casting. Because the underground wall is cast in sections, joint structures are arranged between adjacent underground walls and used for connecting two sections of underground walls, so that the possibility of wall seepage is reduced. When the I-steel structure is adopted, the I-steel is usually hung into the groove after the groove section is formed into the groove, the I-steel is matched with each other, and the reinforcement cage is arranged between two adjacent I-steels. However, the width of the I-steel is smaller than that of the groove section, concrete flows to the other side through a gap between the I-steel and the groove wall, so that concrete exists on the back surface of the I-steel, after a period of time, the concrete floats and solidifies on the back surface of the I-steel to form a layer of film, and when the adjacent groove sections are used for pouring concrete, the contact surface between the post-pouring concrete and the I-steel is possibly not firmly bonded, so that a water seepage channel is formed, and water leakage occurs at a joint of the underground diaphragm wall. Disclosure of Invention In order to reduce the possibility of back penetration of concrete to I-steel, the application provides an underground diaphragm wall structure and a construction method thereof. In a first aspect, the present application provides an underground diaphragm wall structure, which adopts the following technical scheme: An underground diaphragm wall structure comprising The steel reinforcement cage and the connector are arranged on two opposite sides of the steel reinforcement cage; The joint comprises a first partition plate, a second partition plate, a plugging plate, a driving assembly and a sealing assembly; the second partition board is abutted against the reinforcement cage, and the width of the second partition board is larger than that of the reinforcement cage; the first partition plates are symmetrically arranged and are respectively positioned at two opposite ends of the second partition plate, a connecting cavity extending along the vertical direction is formed on one side, away from the second partition plate, of the first partition plate, and the plugging plate is hinged to the first partition plate and is positioned in the connecting cavity; the driving assembly is arranged on the first partition board and drives the plugging plate to turn over to the wall of the abutting groove section; the sealing assembly is arranged on the first partition board, and when the plugging plate turns over outwards of the connecting cavity, the sealing assembly seals the gap between the plugging plate and the wall of the connecting cavity. Through adopting above-mentioned technical scheme, during the underground wall construction, put into the groove section with the joint, then place the steel reinforcement cage between two adjacent joints, then through drive assembly drive shutoff board for the shutoff board is towards connecting the outer upset of chamber, until the cell wall of butt joint board butt groove section. And then pouring concrete and waiting for the concrete to solidify, thus completing the construction of a section of underground wall. And carrying out the construction of the rest underground walls according to the same operation until the construction of the underground continuous wall is completed. The whole process is simple, forms seal structure between the cell wall of first baffle and slot section, reduces the possibility that appears concrete to connect the back seepage when the slot section is conveniently put into to the joint. Optionally, the driving assembly comprises a driving column, a rotating shaft, a driving belt, a power column, a driving gear, a transmission gear, a driving column, a driving rack and a power gear; The first partition plate is provided with a driving groove communicated with the connecting cavity, and the driving column slides in the driving groove; the rotating shaft is rotatably connected with the first partition plate and is coaxially arranged with the dri