CN-122013754-A - Rigid-flexible combined template type joint device for underground diaphragm wall and construction method

CN122013754ACN 122013754 ACN122013754 ACN 122013754ACN-122013754-A

Abstract

The invention discloses a rigid-flexible combined template type joint device of an underground diaphragm wall and a construction method, wherein the rigid-flexible combined template type joint device of the underground diaphragm wall comprises a rigid joint body and a high-strength flexible capsule body which is connected to the side edge of the rigid joint body and can be inflated and retracted; the method is characterized in that the method is used for controlling the water flushing pressure in the capsule in the casting process, controlling the shrinkage high-strength capsule to cling to the joint pipe after the initial setting of the top concrete is finished, and then sequentially pulling out the joint pipe sections, so that the casting speed of the underground diaphragm wall is not limited, the casting quality can be ensured, the process is simple and easy to control, and the process guarantee degree is high.

Inventors

JIANG ZHIAN
LV MEILING
SU HANG
XU FANGCAI
WU JINWEI
WANG BAOHUI
QIAO ZHENGHAO
WU WENBO
LIU XINGYU
CHEN CHANGMIN

Assignees

中国水电基础局有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (9)

1. The rigid-flexible combined template type joint device for the underground diaphragm wall is characterized by comprising a rigid joint body and a high-strength flexible capsule body which is connected to the side edge of the rigid joint body and can be inflated and retracted.
2. The rigid-flexible combined formwork joint device for the underground diaphragm wall according to claim 1, wherein the number of the high-strength flexible capsule bodies is two, and the two high-strength flexible capsule bodies are symmetrically adhered to the side edges of the rigid joint body.
3. The rigid-flexible combined template joint device for the underground diaphragm wall according to claim 2, wherein the rigid joint body is of a hollow structure and comprises an arc-shaped plate and two connecting plates which are connected with the arc-shaped plate and are symmetrically arranged, and the two connecting plates are correspondingly connected with the two high-strength flexible capsule bodies respectively.
4. The diaphragm wall rigid-flexible combined template joint device according to claim 1, wherein the high-strength flexible capsule body comprises a flexible capsule part and a rigid flower pipe penetrating through the flexible capsule part and communicated with the interior of the flexible capsule part.
5. The rigid-flexible combined formwork type joint device for the underground diaphragm wall according to claim 3, further comprising a support body fixedly connected to the inside of the rigid joint body, wherein both ends of the longitudinal support piece of the support body partially protrude out of the side surface of the rigid joint body to form a pulling stress opening.
6. The rigid-flexible combined formwork type joint device for the underground diaphragm wall according to claim 5, wherein the two ends of the longitudinal supporting piece are fixedly connected with rubber baffles.
7. The rigid-flexible combined formwork type joint device for the underground diaphragm wall according to claim 5, wherein a plurality of hydraulic pulling openings are formed in the end faces of the two sides of the longitudinal support piece at intervals.
8. The underground diaphragm wall rigid-flexible combined formwork type joint device according to claim 5, wherein the outer surface of the arc-shaped plate and the two side end surfaces of the longitudinal support piece are both sprayed with a hydrophobic nano coating.
9. The construction method of the rigid-flexible combined template type joint device of the underground diaphragm wall is characterized by comprising the following steps of: S1, after cleaning holes and changing slurry of an underground diaphragm wall, completing connection of rigid-flexible combined template type joint devices of the underground diaphragm wall of an upper section and a lower section, rapidly detecting air tightness of flexible capsule parts, bonding rubber diaphragms between the flexible capsule parts of the upper section and the lower section, and arranging the rigid-flexible combined template type joint devices of the underground diaphragm wall under the sections; S2, after the rigid-flexible combined template type joint device of the underground diaphragm wall is arranged below the hole bottom, gradually filling water from the hole opening through the rigid flower pipe to fill the flexible capsule; S3, arranging a concrete pouring conduit downwards, and adjusting the pressure in the flexible capsule part in the concrete pouring process to balance the lateral pressure of slurry and flowing concrete at the outer side; S4, pouring the concrete to the top, and after initial setting, starting to set a water pumping pipe under the rigid flower pipe, and pumping water in the flexible capsule through the water pumping pipe to retract the flexible capsule; S5, the rigid-flexible combined template type joint device of the underground diaphragm wall is segmented and pulled through the joint pipe pulling device, so that demoulding of the rigid-flexible combined template type joint device of the underground diaphragm wall and concrete of the diaphragm wall is achieved, and after excavation and emptying pouring of groove sections of adjacent underground diaphragm walls are completed, a semicircular joint of an underground diaphragm wall unit is constructed.

Description

Rigid-flexible combined template type joint device for underground diaphragm wall and construction method Technical Field The invention relates to the technical field of engineering for water conservancy and hydropower, traffic ports, municipal administration and the like, in particular to a rigid-flexible combined template type joint device of an underground diaphragm wall and a construction method. Background The underground diaphragm wall is an important technology of water and electricity engineering underground seepage prevention and urban deep foundation pit, the underground diaphragm wall is constructed by dividing units, joints of the underground diaphragm wall units have various joint forms, wherein a circular joint tube drawing method adopts a sliding mode principle to construct a semicircular joint, and the seepage diameter of the joint is increased and concrete is saved, so that the underground diaphragm wall is widely used. Along with the increase of the design depth of the domestic underground diaphragm wall, particularly the large river water electrical engineering diaphragm wall, the defects of the current round joint tube drawing method are also highlighted, mainly, the casting square quantity is larger and larger, in order to meet the design requirement of concrete, additives such as fly ash and the like are added, the initial setting time of the concrete exceeds 9 hours, the tube drawing has certain limit on the burial depth, the pulling speed of the joint tube and the casting speed under concrete slurry are matched, and the limited casting speed ensures that the casting time of each unit is longer and longer, and accordingly the risk of sticking the tube between the joint tube and the concrete is increased. Disclosure of Invention In view of the above, the present invention provides a rigid-flexible combined formwork type joint device for an underground diaphragm wall and a construction method thereof, which aims to solve the above technical problems. In order to achieve the above purpose, the present invention adopts the following technical scheme: A rigid-flexible combined template type joint device for an underground diaphragm wall comprises a rigid joint body and a high-strength flexible capsule body which is connected to the side edge of the rigid joint body and can be inflated and retracted. Preferably, the number of the high-strength flexible capsule bodies is two, and the two high-strength flexible capsule bodies are symmetrically adhered to the side edges of the rigid joint body. Preferably, the rigid connector body is of a hollow structure, and comprises an arc-shaped plate and two connecting plates which are connected with the arc-shaped plate and are arranged symmetrically, and the two connecting plates are respectively and correspondingly connected with the two high-strength flexible capsule bodies. Preferably, the high-strength flexible capsule body comprises a flexible capsule part and a rigid flower pipe penetrating through the flexible capsule part and communicated with the inside of the flexible capsule part. Preferably, the connector further comprises a support body fixedly connected to the inside of the rigid connector body, and two ends of the longitudinal support piece of the support body partially protrude out of the side face of the rigid connector body to form a pulling stress opening. Preferably, both ends of the longitudinal support piece are fixedly connected with rubber baffles. Preferably, a plurality of hydraulic pulling openings are arranged on the end surfaces of the two sides of the longitudinal support piece at intervals. Preferably, hydrophobic nano-coatings are sprayed on the outer surface of the arc-shaped plate and the end surfaces of the two sides of the longitudinal support piece. The invention provides a construction method of a rigid-flexible combined template type joint device of an underground diaphragm wall, which comprises the following steps: S1, after cleaning holes and changing slurry of an underground diaphragm wall, completing connection of rigid-flexible combined template type joint devices of the underground diaphragm wall of an upper section and a lower section, rapidly detecting air tightness of flexible capsule parts, bonding rubber diaphragms between the flexible capsule parts of the upper section and the lower section, and arranging the rigid-flexible combined template type joint devices of the underground diaphragm wall under the sections; S2, after the rigid-flexible combined template type joint device of the underground diaphragm wall is arranged below the hole bottom, gradually filling water from the hole opening through the rigid flower pipe to fill the flexible capsule; S3, arranging a concrete pouring conduit downwards, and adjusting the pressure in the flexible capsule part in the concrete pouring process to balance the lateral pressure of slurry and flowing concrete at the outer side; S4, pouring the concrete to the top,