CN103741724A - Precast pre-stressed underground diaphragm wall joint - Google Patents
Precast pre-stressed underground diaphragm wall joint Download PDFInfo
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- CN103741724A CN103741724A CN201410019765.XA CN201410019765A CN103741724A CN 103741724 A CN103741724 A CN 103741724A CN 201410019765 A CN201410019765 A CN 201410019765A CN 103741724 A CN103741724 A CN 103741724A
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Abstract
The invention discloses a precast pre-stressed underground diaphragm wall joint which comprises a plurality of joint sections in sequential connection from top to bottom. Each joint section comprises two parallel frange plates and a web connected with the two parallel frange plates, a circular ring is arranged at the center of the cross section of each web, part of circular ring sides forming each circular ring annularly protrude towards two sides connected with an underground diaphragm wall, the bottom face of the bottom joint section is provided with a blade foot, and the bottom faces of other joint sections are provided with connection plugs. The connection plug of one joint section is inserted into the inner circle of the circular ring of the adjacent joint section, a pre-buried steel plate is arranged at the joint of the two joint sections and connected with a connection steel plate which is connected with the two joint sections, and pre-stressing rib holes are longitudinally reserved in each frange plate. The precast pre-stressed underground diaphragm wall joint is reasonable in structure, reliable in connection, excellent in structural performance and high in industrial degree.
Description
Technical field
The diaphragm wall design and construction field that the present invention relates to a kind of architecture Foundation Pit Engineering, is specifically related to a kind of prefabricated prestressed underground continuous wall joint.
Background technology
Underground continuous wall construction technique originates from Europe, the construction method of building diaphragm wall in 1938 in Italy's exploitation mud supporting deep trouth.First 1950 use mud deep trouth to build diaphragm wall engineering in Italy.50～sixties of 20th century, this technology was promoted in western developed country, the former Soviet Union and Japan.Within 1958, China uses this technology to build dam impervious wall, and the mid-1970s technique promotes the use of the industries such as building, colliery and municipal administration.Diaphragm wall is because its rigidity is large, and having advantages of affects littlely on foundation ditch surrounding soil and works, and can work as retaining wall and use, perfect along with grooving machinery, the raising of construction precision, the underground external wall that also can be used as agent structure is used.
Construction of diaphragm wall is mainly divided into: construction of guide wall, fabrication of reinforcing cage, mud making, grooving setting-out, trenching construction, install reinforcing cage, underwater concreting, the processing of groove section joint etc.Wherein the construction quality of joint directly affects the integral construction quality of diaphragm wall, if joint goes wrong, will cause underground wall body structure to occur the problems such as seepage, affects the use of underground structure.Underground continuous wall connector mainly comprises I-shaped steel joint, snap close pipe etc.Wherein, on I-shaped steel joint, bottom flange and reinforcing cage weld together, and the diaphragm wall holistic resistant behavior of formation is good.But this joint exists concrete to stream in filling concrete process presss from both sides the mass defects such as mud with joint area.Concrete streams and can cause follow-up underground continuous wall groove segment to dig motionless phenomenon, and i iron web folder mud causes joint percolation phenomenon.The subject matter that locking notch pipe joint exists comprises: operation quality control difficulty is large under water, easily causes locking notch pipe to tilt; Locking notch pipe level is little to rigidity, and during concreting, lateral pressure is large, and its verticality is difficult to control, and causes diaphragm wall vertical abutment joint not straight, and percolation phenomenon, very easily appears in imprecision; Locking notch pipe is extracted more difficult control of time, is prone to quality accident early than the concrete initial set time, is later than initial setting time grip of concrete large, causes locking notch pipe difficulty to pull out and even pulls off phenomenon.
Be badly in need of in sum a kind of underground continuous wall connector reliable, structural performance is good, industrialization degree is high of constructing rationally, connect.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of prefabricated prestressed underground continuous wall joint, realized a kind of underground continuous wall connector reliable, structural performance is good, industrialization degree is high of constructing rationally, connect.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of prefabricated prestressed underground continuous wall joint, comprise the some joint junctions that connect successively from top to bottom, described junction comprises two frange plates that be arranged in parallel and the web that is connected two frange plates, the center of the cross section of described web is an annulus, form the part annulus limit of annulus towards the both sides annular protrusion being connected with diaphragm wall, on the bottom surface of the junction bottom being arranged on, be provided with sword pin, on the bottom surface of all the other junctions, be provided with attachment plug, the attachment plug of a linkage section embeds in the annulus inner circle of coupled linkage section, the junction of two junctions is provided with pre-embedded steel slab, described pre-embedded steel slab connects with the junction steel plate in order to be connected two junctions, in described frange plate, be vertically arranged with reserved presstressed reinforcing steel hole.
Described attachment plug is hollow cylinder structure, and the outer perimeter of described attachment plug equates with the interior girth of annulus.
The wide cut of described frange plate is not less than 0.5m.
Beneficial effect of the present invention: 1, the cross-section center place of web of the present invention is an annulus, form the part annulus limit of annulus towards the both sides annular protrusion being connected with diaphragm wall, increased around oozing path, effectively improved and the shear strength of diaphragm wall junction, efficiently solved diaphragm wall Seepage problems; 2, the present invention can realize the requirement of rapid construction, and described underground continuous wall connector adopts suitable length merogenesis to make, and can realize prefabrication, adopts member structure on an empty stomach, solves transportation and lifting problem; 3, the present invention is provided with attachment plug, the attachment plug of a linkage section embeds in the annulus inner circle of coupled linkage section, the junction of two junctions is provided with pre-embedded steel slab, pre-embedded steel slab connects with the junction steel plate in order to be connected two junctions, guarantee that junction can bear the load of vertical and horizontal direction, effective stress performance that improved; 4, the present invention replaces underground continuous wall connector equipment and replaces a part of cast-in-place continuous underground wall structure, removes the operation that junction device pulls up from, saves the duration, reduces cost; 5, two frange plate fabric width designs of the present invention are not less than 0.5m, assurance junction level is streamed path to rigidity and concrete, and the present invention is without the headroom of reserving main tendon protective layer as I shape joint, the generation of having streamed while having prevented groove section concreting; 6, be arranged on the bottom surface of junction of the present invention bottom and be provided with sword pin, in reliable gravity incision soil, can be effectively fixing; 7, in frange plate of the present invention, be vertically arranged with reserved presstressed reinforcing steel hole, described underground continuous wall connector has applied prestressing force, bending rigidity and the cracking resistance of joint have been improved, thereby reach the flexural deformation, the raising joint durability texts that reduce joint, guaranteed the verticality of joint simultaneously, guarantee that the fabric width of construction width is in design width, also guaranteed the fabric width of next construction width simultaneously, effectively improve the quality of the cast-in-place width of diaphragm wall, guaranteed the integral rigidity of underground continuous wall groove segment syndeton.
Accompanying drawing explanation
Fig. 1 is the structural representation of a junction of the present invention.
Fig. 2 is the structural representation of two junctions being connected of the present invention.
Fig. 3 is the side structure schematic diagram of two junctions being connected of the present invention.
Fig. 4 is the cross section of a junction of the present invention.
Fig. 5 is the floor map of the present invention and the cast-in-place groove section of diaphragm wall.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As Fig. 1, 2, 3, shown in 4 and 5, a kind of prefabricated prestressed underground continuous wall joint, comprise the some joint junctions 5 that connect successively from top to bottom, described junction 5 comprises two frange plates that be arranged in parallel 1 and the web that is connected two frange plates 1, the center of the cross section of described web is an annulus 3, form the part annulus limit of annulus 3 towards the both sides annular protrusion being connected with diaphragm wall, on the bottom surface of the junction 5 bottom being arranged on, be provided with sword pin 8, on the bottom surface of all the other junctions, be provided with attachment plug 4, described attachment plug 4 is hollow cylinder structure, the outer perimeter of described attachment plug 4 equates with the interior girth of annulus, the attachment plug 4 of a linkage section 5 embeds in annulus 3 inner circles of coupled linkage section, the junction of two junctions 5 is provided with pre-embedded steel slab 6, described pre-embedded steel slab 6 connects with the junction steel plate 7 in order to be connected two junctions 5, in described frange plate 1, be vertically arranged with reserved presstressed reinforcing steel hole 2, the wide cut of described frange plate 1 is not less than 0.5m.
Above-described underground continuous wall connector is divided into some joint junctions 5, each junction 5 is in the light of actual conditions prefabricated in the factory, the center of the cross section of the web of each junction 5 is an annulus 3, form the part annulus limit of annulus 3 towards the both sides annular protrusion being connected with diaphragm wall, this structure is not only because quality has gently solved transportation and lifting problem, increased around oozing path simultaneously, effectively improved and the shear strength of diaphragm wall junction, efficiently solved diaphragm wall Seepage problems; Two frange plate 1 fabric width designs of each junction 5 are not less than 0.5m, assurance junction level is streamed path to rigidity and concrete, and the prefabricated joint forming is without the headroom of reserving main tendon protective layer as I shape joint, the generation of having streamed while having prevented groove section concreting; On the bottom surface of the junction 5 bottom being arranged on, be provided with sword pin 8, in reliable gravity incision soil, can be effectively fixing; Except the junction 5 of bottom, on the bottom surface of all the other junctions 5, be provided with attachment plug 4, the attachment plug 4 of a linkage section 5 embeds in annulus 3 inner circles of coupled linkage section 5, the junction of two junctions 5 is provided with pre-embedded steel slab 6, pre-embedded steel slab 6 connects with the junction steel plate 7 in order to be connected two junctions 5, guarantee that junction 5 can bear the load of vertical and horizontal direction, effective stress performance that improved; In frange plate 1, be vertically arranged with reserved presstressed reinforcing steel hole 2, described underground continuous wall connector has applied prestressing force, bending rigidity and the cracking resistance of joint have been improved, thereby reach the flexural deformation, the raising joint durability texts that reduce joint, guaranteed the verticality of joint simultaneously, guarantee that the fabric width of construction width is in design width, also guaranteed the fabric width of next construction width simultaneously, effectively improve the quality of the cast-in-place width of diaphragm wall, guaranteed the integral rigidity of underground continuous wall groove segment syndeton.
Described underground continuous wall connector replaces underground continuous wall connector equipment and replaces a part of cast-in-place continuous underground wall structure, and the Specific construction process of this joint comprises the steps:
(1) prefabricated underground continuous wall connector.At the scene or prefabrication underground continuous wall connector, according to actual transport capacity and the restriction of lifting, divide some joint junctions 5 prefabricated underground continuous wall connector.
(2) prefabricated underground continuous wall connector excavation position is positioned.By measuring, determine underground continuous wall groove segment framing position, using joint center as grooving and the excavation centre of location, according to the steel concrete measuring, lead wall top and determine cutting depth for elevation.
(3) underground continuous wall groove segment of having good positioning is carried out to trenching construction.The underground continuous wall groove segment of having good positioning is excavated to projected depth and removes bottom sediment, and box cut section is used swell soil to carry out mud off; Stable in order to guarantee cell wall, in grooving process, every 2 hours, detect a quality of mud fluid, and change in time underproof mud.
(4) hoisting prefabricated underground continuous wall connector.Concrete lifting step: the junction 5 that first hangs the bottom of prefabricated underground continuous wall connector, presstressed reinforcing steel anchored end is set, then lift another joint junction 5, in the annulus inner circle of attachment plug 4 embeddings of junction 5 and the junction 5 of bottom, by pre-embedded steel slab 6, connect with the junction steel plate 7 in order to be connected two junctions 5 again, in like manner other junctions 5 are spliced, form a complete underground continuous wall connector, by the center-aligned of the center of complete underground continuous wall connector and groove section, by the verticality of monitoring ultrasonic cell wall and joint, reach after criterion of acceptability, by gravity, underground continuous wall connector bottom sword pin 8 is cut to the soil body degree of depth and be not less than 0.5m, then at the junction 5 at top, apply prestressing force, finally the top of underground continuous wall connector is fixed on and is led on wall.
(5) the clear hole of joint and concreting.First carry out hole clearly, after clear hole is qualified, from the bottom pouring concrete of underground continuous wall connector, water also standing to joint top.
(6) timeliness is static.After construction of underground continuous wall jointing, must carry out 48 hours above timeliness static, heavy real to guarantee the abundant return of underground continuous wall connector grooving section surrounding soil.Return is close to cast-in-place diaphragm wall width after sinking in fact.
(7) underground continuous wall connector and groove section are separated to construction.In the underground continuous wall connector grooving section soil body timeliness quiescent period, the contiguous underground continuous wall connector of construction continuously, adopt this construction method, underground continuous wall connector and underground continuous wall groove segment can continuous productive processes, make underground continuous wall groove segment all according to closed width construction, guarantee construction quality and duration.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a prefabricated prestressed underground continuous wall joint, it is characterized in that: comprise the some joint junctions (5) that connect successively from top to bottom, described junction (5) comprises two frange plates that be arranged in parallel (1) and the web that is connected two frange plates (1), the center of the cross section of described web is an annulus (3), form the part annulus limit of annulus (3) towards the both sides annular protrusion being connected with diaphragm wall, on the bottom surface of the junction (5) bottom being arranged on, be provided with sword pin (8), on the bottom surface of all the other junctions, be provided with attachment plug (4), the attachment plug (4) of a linkage section (5) embeds in annulus (3) inner circle of coupled linkage section, the junction of two junctions (5) is provided with pre-embedded steel slab (6), described pre-embedded steel slab (6) connects with the junction steel plate (7) in order to be connected two junctions (5), in described frange plate (1), be vertically arranged with reserved presstressed reinforcing steel hole (2).
2. a kind of prefabricated prestressed underground continuous wall joint according to claim 1, is characterized in that: described attachment plug (4) is hollow cylinder structure, and the outer perimeter of described attachment plug (4) equates with the interior girth of annulus (3).
3. a kind of prefabricated prestressed underground continuous wall joint according to claim 1, is characterized in that: the wide cut of described frange plate (1) is not less than 0.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410019765.XA CN103741724B (en) | 2014-01-16 | 2014-01-16 | A kind of prefabricated prestressed underground continuous wall joint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410019765.XA CN103741724B (en) | 2014-01-16 | 2014-01-16 | A kind of prefabricated prestressed underground continuous wall joint |
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| CN103741724A true CN103741724A (en) | 2014-04-23 |
| CN103741724B CN103741724B (en) | 2015-12-02 |
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| CN201410019765.XA Expired - Fee Related CN103741724B (en) | 2014-01-16 | 2014-01-16 | A kind of prefabricated prestressed underground continuous wall joint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168023A (en) * | 2016-08-19 | 2016-11-30 | 中铁隧道勘测设计院有限公司 | Diaphram wall steel reinforcement cage segmental hoisting method of attachment under low clearance operating condition |
| CN115387323A (en) * | 2022-08-12 | 2022-11-25 | 上海建工二建集团有限公司 | Assembled underground continuous wall connecting joint and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3416297A1 (en) * | 1984-05-03 | 1985-11-07 | Gunter 2000 Hamburg Thümmler | Method of producing underground structures of concrete parts, arrangement and material for carrying out this method |
| JPH047410A (en) * | 1990-04-24 | 1992-01-10 | Nippon Steel Corp | Method for constructing concrete walllike structure |
| CN201756706U (en) * | 2010-08-19 | 2011-03-09 | 中交第三航务工程勘察设计院有限公司 | Underground continuous wall rigid joint |
| CN202787328U (en) * | 2012-08-14 | 2013-03-13 | 武汉地质勘察基础工程有限公司 | Underground continuous wall connecting device |
| CN203096769U (en) * | 2013-01-10 | 2013-07-31 | 广东省基础工程公司 | Seepage-proofing connector of underground diaphragm wall |
| CN203334322U (en) * | 2013-07-15 | 2013-12-11 | 中国建筑第二工程局有限公司 | Underground continuous wall seepage-proofing and grout-stopping device |
-
2014
- 2014-01-16 CN CN201410019765.XA patent/CN103741724B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3416297A1 (en) * | 1984-05-03 | 1985-11-07 | Gunter 2000 Hamburg Thümmler | Method of producing underground structures of concrete parts, arrangement and material for carrying out this method |
| JPH047410A (en) * | 1990-04-24 | 1992-01-10 | Nippon Steel Corp | Method for constructing concrete walllike structure |
| CN201756706U (en) * | 2010-08-19 | 2011-03-09 | 中交第三航务工程勘察设计院有限公司 | Underground continuous wall rigid joint |
| CN202787328U (en) * | 2012-08-14 | 2013-03-13 | 武汉地质勘察基础工程有限公司 | Underground continuous wall connecting device |
| CN203096769U (en) * | 2013-01-10 | 2013-07-31 | 广东省基础工程公司 | Seepage-proofing connector of underground diaphragm wall |
| CN203334322U (en) * | 2013-07-15 | 2013-12-11 | 中国建筑第二工程局有限公司 | Underground continuous wall seepage-proofing and grout-stopping device |
Non-Patent Citations (1)
| Title |
|---|
| 王卫东: "《地下连续墙预制接头技术的研究与应用》", 《地下空间与工程学报》, vol. 3, no. 3, 30 June 2007 (2007-06-30), pages 499 - 508 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168023A (en) * | 2016-08-19 | 2016-11-30 | 中铁隧道勘测设计院有限公司 | Diaphram wall steel reinforcement cage segmental hoisting method of attachment under low clearance operating condition |
| CN115387323A (en) * | 2022-08-12 | 2022-11-25 | 上海建工二建集团有限公司 | Assembled underground continuous wall connecting joint and construction method thereof |
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| CN103741724B (en) | 2015-12-02 |
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