CN-121976568-A - Prepressing waterproof assembled dry-wet composite joint structure

CN121976568ACN 121976568 ACN121976568 ACN 121976568ACN-121976568-A

Abstract

The invention relates to a prepressing waterproof assembled dry-wet composite joint structure, which at least comprises 2 self-waterproof prefabricated components, a pressing piece, waterproof materials, A1 reinforcing ribs, A2 reinforcing ribs, B1 reinforcing ribs, post-loading reinforcing ribs and post-pouring materials, wherein the self-waterproof prefabricated components contain variable cross-section areas, and the reinforcing ribs are arranged in the self-waterproof prefabricated components and are compounded with the post-pouring materials, so that the joint structure has strong bearing performance. Meanwhile, the compression piece contained in the structure can compress waterproof materials in joints, so that the self-waterproof prefabricated part has excellent waterproof performance, overhanging reinforcing steel bars are selected as tensioning points during prepressing operation, the compression piece can also be used as a connecting piece of reinforcing steel bars after the operation is finished, a connecting joint of the reinforcing steel bars is not required to be additionally arranged, assembling and connecting steps are reduced, meanwhile, the rear-mounted reinforcing steel bars adopt staggered rear assembling design, and sufficient operation space is reserved for prepressing the compression piece.

Inventors

YANG XIUREN
JIANG ZHIWEI
HUANG MEIQUN
WU CHENGGANG
LIN FANG
FAN QI
PENG ZHIYONG

Assignees

北京城建设计发展集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260311

Claims (9)

1. The utility model provides a dry wet composite joint structure of waterproof assembled of pre-compaction, contains two from waterproof prefabricated components, reinforcing bar connection stretching device and post-cast material, and two are respectively from waterproof prefabricated components and second from waterproof prefabricated components for first from waterproof prefabricated components, two are from waterproof prefabricated components for the cement-based prefabricated components of processing in prefabricated mill, its characterized in that: the ends of the first self-waterproof prefabricated part and the second self-waterproof prefabricated part contain variable cross-section areas, the problem of water leakage possibly generated by the joint structure cast in situ is solved by utilizing the good self-waterproof characteristic of the prefabricated parts, and the variable cross-section areas are also used as templates for casting post-cast materials in situ; The gap formed after the first self-waterproof prefabricated part and the second self-waterproof prefabricated part are butted is a key water stop area, a butted part of the first self-waterproof prefabricated part is provided with a first waterproof material, and a butted part of the second self-waterproof prefabricated part is correspondingly provided with a second waterproof material; The steel bar connection tensioning device comprises a compressing piece which is arranged on the inner side of a variable cross-section area of a first self-waterproof prefabricated part and a second self-waterproof prefabricated part so as to better compress, and the compressing piece is connected with an A1 reinforcing rib which is connected to the inner side of the first self-waterproof prefabricated part and an A2 reinforcing rib which is connected to the inner side of the second self-waterproof prefabricated part at the same time, so that the compressing piece is driven to compress the self-waterproof prefabricated part and the self-waterproof prefabricated part at a splicing joint.
2. The pre-pressed waterproof assembled dry-wet composite joint structure of claim 1, wherein the first waterproof material and the second waterproof material are made of waterproof sealing gaskets or water-swelling rubber.
3. The pre-pressing waterproof assembled dry-wet composite joint structure of claim 1, wherein the pressing piece adopts a basket bolt and an electric tightener to realize the pressing function.
4. The dry-wet composite joint structure of pre-compaction waterproof assembly formula of claim 1, wherein through setting up the flexible subassembly at the first prefabricated component of preventing water certainly and the second prefabricated component of preventing water certainly for the one end of butt joint portion, the flexible subassembly contains at least two first embedded nuts that set up on the first prefabricated component of preventing water certainly, at least two second embedded nuts and telescopic link that set up on the second prefabricated component of preventing water certainly, the both ends of telescopic link are fixed in first embedded nut and second embedded nut respectively through the bolt, the middle part of telescopic link is equipped with compression spring in order to offset this part additional bending moment's effect.
5. The dry-wet composite joint structure of pre-pressed waterproof assembly type of claim 1, wherein after the first waterproof material and the second waterproof material are pressed, grouting materials and isolation rubber for plugging the grouting materials are arranged on the inner sides of the first waterproof material and the second waterproof material.
6. The dry-wet composite joint structure of claim 1, wherein a second compression assembly is provided in addition to the compression member, the A1 reinforcing rib and the A2 reinforcing rib, the second compression assembly comprising a B1 reinforcing rib and a post-load reinforcing rib in a variable cross-section area, the B1 reinforcing rib being connected to the inside of the second self-waterproof prefabricated member.
7. The dry-wet composite joint structure of pre-compression waterproof assembly type of claim 6, wherein the A1 reinforcing rib, the A2 reinforcing rib and the B1 reinforcing rib are connected with the prefabricated parts in a prefabricated part factory, the post-installed reinforcing ribs are developed after the pre-compression operation is completed by adopting the compression part, and the post-installed reinforcing ribs are connected with the first self-waterproof prefabricated parts by adopting the reinforcing steel bar connector during installation.
8. The dry-wet composite joint structure of pre-pressing waterproof assembly type of claim 7, wherein the other end of the post-installed reinforcing rib is connected with the B1 reinforcing rib by adopting a welding, mechanical connection, grouting sleeve or lap joint mode, and the post-installed reinforcing rib is connected after the pre-pressing is finished.
9. The dry-wet composite joint structure of pre-pressed waterproof assembly type according to claim 8, wherein the position of the reinforcing bar joint formed by the post-installed reinforcing bar and the B1 reinforcing bar is staggered with the pressing piece in the thickness direction of the prefabricated part.

Description

Prepressing waterproof assembled dry-wet composite joint structure Technical Field The invention relates to the technical field of connection of underground structures, semi-underground structures and geotechnical structures, in particular to a pre-pressing waterproof assembled dry-wet composite joint structure. Background In recent years, under policy guidance, construction of an assembled underground structure represented by an assembled subway station structure continues to accelerate, and existing structural forms mainly include a fully assembled structure, an assembled integral structure, and the like. The former is connected without rigidity in the joint area, mainly adopting tenon-mortise or bolt mode, etc. the latter contains rigidity in the joint, such as grouting sleeve connection or welding, etc. the different joint connection modes can result in larger difference of the characteristics of the two structures. The fully assembled underground structure has a plurality of advantages, wherein the good waterproof performance is one of the most outstanding advantages. The fully prefabricated part can be processed in a factory and can be made of waterproof concrete, and after the measure of pressing the waterproof sealing gasket is adopted at the joint seam, the waterproof performance of the structure is far higher than that of the traditional cast-in-situ structure. From the existing engineering experience, the fully assembled subway station structure built in recent years has no water leakage phenomenon, and well solves the 'ten-station nine-leakage' chronic diseases existing in the traditional cast-in-situ underground structure. However, because the fully assembled underground structure adopts a flexible connection mode, the joint has no strong connection and small bending rigidity, the prefabricated components after connection are difficult to independently bear, and a plurality of components are usually required to be spliced into a whole-ring structure and are stable depending on the enclosing effect of a rock-soil body. Therefore, fully assembled designs and construction techniques are not suitable for semi-underground structures, geotechnical structures, and underground structures that require strong rigidity. Because of the rigid joint, the integral rigidity of the assembled integral underground structure is high, and the structure stability can be kept independent of surrounding rock-soil bodies. However, because the steel bars are required to be connected on the construction site and the node areas are integrally poured, the waterproof sealing materials are difficult to compress by adopting a conventional method, if additional measures with higher cost are not adopted, the water leakage risk of the node areas of the structure is higher than that of the fully assembled underground structure, and once the water leakage problem occurs to the structure, the maintenance cost of the structure is greatly increased. In addition, because a large number of reinforcing steel bars are required to be connected on a construction site, the problem of lower construction efficiency exists in the assembled integral underground structure. Therefore, for the semi-underground structure and the geotechnical structure which are not looped, such as a rail traffic U-shaped groove structure and the like, and the underground structure which needs to improve the overall rigidity, a novel joint structure with strong rigidity, good waterproof performance, low comprehensive cost, high construction efficiency and strong practicability is needed. Therefore, the designer of the invention has the defects that the pre-pressing waterproof assembled dry-wet composite joint structure is researched and designed by combining the experiences and achievements of related industries through intensive research and design so as to overcome the defects. Disclosure of Invention The invention aims to provide a prepressing waterproof assembled dry-wet composite joint structure which has the advantages of strong bearing performance and good waterproof performance, has the remarkable characteristics of convenience in assembly and construction, lower comprehensive cost and the like, and has a wide application prospect. In order to achieve the above purpose, the invention discloses a prepressing waterproof assembled dry-wet composite joint structure, which comprises two self-waterproof prefabricated parts, a steel bar connection tensioning device and post-pouring materials, wherein the two self-waterproof prefabricated parts are respectively a first self-waterproof prefabricated part and a second self-waterproof prefabricated part, and the two self-waterproof prefabricated parts are cement-based prefabricated parts processed in a prefabricated factory, and the prepressing waterproof assembled dry-wet composite joint structure is characterized in that: the ends of the first self-waterproof prefabricated part and the second self-waterproof prefabri