Nothing Special   »   [go: up one dir, main page]

CN107503758B - Originating hole water stop device of miniature pipe curtain push bench - Google Patents

Originating hole water stop device of miniature pipe curtain push bench Download PDF

Info

Publication number
CN107503758B
CN107503758B CN201710966985.7A CN201710966985A CN107503758B CN 107503758 B CN107503758 B CN 107503758B CN 201710966985 A CN201710966985 A CN 201710966985A CN 107503758 B CN107503758 B CN 107503758B
Authority
CN
China
Prior art keywords
curtain
rubber plate
plate
pipe
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710966985.7A
Other languages
Chinese (zh)
Other versions
CN107503758A (en
Inventor
黄永春
王欢
刘宇宏
葛金科
郑杰
徐伟忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Urban Construction Municipal Engineering Group Co Ltd
Original Assignee
Shanghai Urban Construction Municipal Engineering Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Urban Construction Municipal Engineering Group Co Ltd filed Critical Shanghai Urban Construction Municipal Engineering Group Co Ltd
Priority to CN201710966985.7A priority Critical patent/CN107503758B/en
Publication of CN107503758A publication Critical patent/CN107503758A/en
Application granted granted Critical
Publication of CN107503758B publication Critical patent/CN107503758B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10Making by using boring or cutting machines
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • E21D11/381Setting apparatus or devices
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/14Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

The invention discloses an originating hole water stop device of a miniature pipe curtain push bench, wherein a pipe curtain comprises at least two push pipes connected through a locking hole, the water stop device comprises a curtain rubber plate, a hole pressing plate and a fixing unit, the curtain rubber plate is arranged at an originating hole and is pressed and fixed through the hole pressing plate and the fixing unit, and the inner outline shape of the curtain rubber plate is matched with the outer outline shape of the pipe curtain; the curtain cloth rubber plate is formed by overlapping and combining two semicircular rubber plates, and is symmetrically arranged by taking each locking connection line in the pipe curtain as an axis. The invention has the advantages that the curtain cloth rubber plate adopts the sectional lap joint type, and can be suitable for jacking pipes with different diameters; and the fishtail-shaped rubber plate is adopted at the locking port position, so that the shearing force of the locking port position during pipeline pushing can be avoided at the cord fabric rubber plate, the pipe jacking pipeline is fully wrapped to prevent the cord fabric rubber plate from being torn and everted, and the water-stopping performance is good, the adaptability is strong, the durability is good and the like.

Description

Originating hole water stop device of miniature pipe curtain push bench
Technical Field
The invention belongs to the technical field of pipe curtain box culvert construction, and particularly relates to an originating hole water stop device of a miniature pipe curtain push bench.
Background
In recent years, with the development of urban construction, pipe jacking construction technology and pipe curtain-box culvert construction technology are widely applied to underground engineering construction, and the pipe jacking construction technology and the pipe curtain-box culvert construction technology are used as novel underground engineering underground excavation technology applicable to soft soil stratum, and have the advantages of no need of reducing underground water and large-scale excavation, small influence on surrounding environments such as ground traffic, pipelines, houses and the like, strict sedimentation deformation control of a crossing area and the like. They are suitable for various strata such as filling soil, silt soil, clay, sand, rock stratum, etc., and especially have obvious superiority in soft soil strata. For the construction of large-section or ultra-large-section underground passages which are not open-cut in shallow burial, such as the construction of large-span large-section underground passages which pass through railways, highways, airport runways, intensive buildings or strict environmental protection requirements, or the underground engineering construction under corresponding special conditions, the pipe curtain-box culvert construction method has great advantages compared with other construction methods.
In the existing pipe curtain-box culvert method construction process, the steel pipes and concrete pipes of most pipe curtains are provided with external locking openings or internal locking openings, and the water stopping measures of the initial openings of the pipe curtains are not easy to construct due to the existence of the locking openings, so that the problems that the integrity of a slurry sleeve is poor, the ground subsidence is caused by the increase of peripheral soil disturbance, the posture of a jacking pipe is not easy to control, the precision of the jacking pipe is poor, the integrity of the steel pipe curtain is greatly reduced and the like are caused.
Specifically, the existing starting hole water stop device of the miniature pipe pushing jack has the following defects:
(1) The rubber plate of the opening is easy to tear
The original opening water stopping device of the existing miniature pipe curtain push bench is easy to be torn by a locking notch, especially an outer locking notch, in the pipe curtain construction process, so that the water stopping device is invalid.
(2) The water stop device is difficult to process
The water stopping device of the starting hole of the existing miniature pipe-curtain push bench needs to be concentric with the pipeline on the guide rail, and the error is smaller than 5mm. During actual installation, the precision is difficult to ensure, and deviation is easy to cause, so that the water stop device is not uniformly pressed, and partial point leakage is caused.
Disclosure of Invention
The invention aims to provide an originating hole water stop device of a miniature pipe curtain push bench according to the defects of the prior art, wherein the water stop device is formed by laminating and superposing a curtain cloth rubber plate and a hole pressing plate, and the curtain cloth rubber plate adopts sectional lap joint type so as to be suitable for push pipes with different diameters; and the fishtail-shaped rubber plate is adopted at the locking port position, so that the shearing force of the locking port position during pipeline pushing can be avoided at the cord fabric rubber plate.
The invention is realized by the following technical scheme:
The utility model provides a miniature pipe curtain push bench's opening water stop device that originates from, the pipe curtain includes at least two push pipes that are connected through the fore shaft, its characterized in that water stop device includes curtain cloth rubber slab, opening clamp plate and fixed unit, the curtain cloth rubber slab set up in the opening that originates from and through opening clamp plate, fixed unit realize pressfitting, fixed, the interior contour shape of curtain cloth rubber slab with pipe curtain outline shape looks adaptation; the curtain cloth rubber plate is formed by overlapping and combining two semicircular rubber plates, and is symmetrically arranged by taking connecting lines among locking ports in the pipe curtain as axes.
The semi-circular rubber plate is connected with a fishtail rubber plate at the corner corresponding to each locking notch, and the fishtail rubber plate and the steel plate wall surface on the locking notch form fitting seal.
The side of the semicircular rubber plate is connected with a lap joint rubber plate, and the lap joint rubber plate is used for lap-jointing the adjacent semicircular rubber plates to form a whole.
The shape of the hole pressing plate is matched with the shape of the curtain cloth rubber plate, and the curtain cloth rubber plate is formed by combining a plurality of annular pressing plates which are arranged in an annular way.
The curtain cloth rubber plate is provided with a plurality of round bolt holes, the hole pressing plate is provided with strip bolt holes at positions corresponding to the round bolt holes, and the fixing unit penetrates through the round bolt holes and the strip bolt holes to fix the hole pressing plate and the curtain cloth rubber plate on the wall surface of the initial hole.
The fixing unit can be one or a combination of a plurality of common bolts, expansion screws and planted bars.
The bar bolt hole size is greater than the circular bolt hole size.
The water stop device has the advantages that (1) the water stop device is formed by laminating and superposing the curtain cloth rubber plate and the hole pressing plate, the curtain cloth rubber plate adopts sectional lap joint, and the lap joint part is divided into an upper ring and a lower ring, so that the water stop device can be suitable for jacking pipes with different diameters; in addition, the installation position of each annular pressing plate can be adjusted up and down and left and right, the shearing force of the locking port part during pipeline pushing can be avoided at the curtain cloth rubber plate, and the pipe jacking pipeline is fully wrapped to prevent the curtain cloth rubber plate from being torn and turned outwards; (2) The water stopping device at the position of the starting hole has the advantages of good water stopping performance, strong adaptability, good durability and the like.
Drawings
FIG. 1 is a schematic diagram of an originating opening water stop device of a miniature pipe-curtain push bench according to the present invention;
FIG. 2 is a schematic view of a semicircular rubber plate structure in the present invention;
FIG. 3 is a schematic diagram of a cord fabric rubber plate formed by overlapping semicircular rubber plates in the invention;
FIG. 4 is a schematic view of the structure of the hole pressing plate in the invention;
Fig. 5 is a schematic diagram of a push pipe connected via a locking notch according to the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings, to facilitate understanding by those skilled in the art:
As shown in fig. 1-5, reference numerals 1-7 are respectively: a cord fabric rubber plate 1, a semicircular rubber plate 1a, a fishtail rubber plate 1b, a lap joint rubber plate 1c and a circular bolt hole 1d; an opening pressing plate 2, a circumferential pressing plate 2a, a circumferential pressing plate 2b and a strip-shaped bolt hole 2c; the device comprises a fixing unit 3, an originating hole 4, a bar planting 5, a jacking pipe 6 and a locking notch 7.
Examples:
as shown in fig. 1, the embodiment specifically relates to an originating hole water stop device of a mini pipe curtain push bench, which is arranged on an originating hole 4 and is mainly formed by combining a curtain rubber plate 1, a hole pressing plate 2 and a fixing unit 3.
As shown in fig. 5, the mini-type pipe-roof push bench according to the present embodiment is used for pushing the pipe-roof 6 to form a pipe-roof by combination, and the adjacent pipe-roof 6 is connected by the locking notch 7.
As shown in fig. 1,2 and 3, the curtain cloth rubber plate 1 is attached and fixed on the wall surface of the starting hole 4, and is designed in a sectional mode, namely, the curtain cloth rubber plate is formed by splicing two semicircular rubber plates 1a, the two semicircular rubber plates 1a are symmetrically arranged by taking the connecting line of each locking opening in the pipe curtain as an axis, as shown in fig. 5, when the pipe curtain is a horizontal pipe curtain, the two semicircular rubber plates 1a are symmetrically arranged up and down, or when the pipe curtain is a vertical pipe curtain, the two semicircular rubber plates 1a are symmetrically arranged left and right; the two-piece design makes the water stop device install more swiftly, and sealing performance is more effective, and the suitability is also better.
As shown in fig. 2 and 5, the inner contour of the semicircular rubber plate 1a is matched with the outer wall surface of the jacking pipe 6, and can be tightly attached to the outer wall surface of the jacking pipe 6; the angle part of the semicircular rubber plate 1a corresponding to the position of the locking notch 7 is connected with a fishtail rubber plate 1b, and the fishtail rubber plate 1b can be tightly attached to the wall surface of the steel plate on the locking notch 7 to play a role in sealing; the two sides of the semicircular rubber plates 1a are respectively provided with a lap joint rubber plate 1c, and the two adjacent semicircular rubber plates 1a can be lapped to form a whole through the lap joint rubber plates 1 c; as shown in fig. 3, when the curtain is specifically used, the side parts of two adjacent semicircular rubber plates 1a are lapped through the lapped rubber plates 1c to form a whole, and the two fishtail rubber plates 1b at the corners form a plane which can be attached to the wall surface of the locking notch 7 after being lapped, so that the curtain can be used in a curtain with a plurality of jacking pipes 6 as shown in fig. 5, the curtain rubber plates 1 can be firmly installed horizontally through the arrangement of the lapped rubber plates 1c and can extend horizontally, and the curtain is suitable for construction conditions of jacking of a plurality of jacking pipes at the opening of a horizontal curtain or a vertical curtain. Further, a plurality of circular bolt holes 1d are uniformly distributed on the semicircular rubber plate 1a so that the fixing unit 3 can pass therethrough and fix it to the wall surface of the originating opening 4.
As shown in fig. 1, 4 and 5, the shape of the hole pressing plate 2 is matched with the cord fabric rubber plate 1 and is used for pressing and positioning the cord fabric rubber plate 1; the hole pressing plate 2 is in a block design and consists of a plurality of annular pressing plates 2a and 2b with special shapes and is distributed in an annular direction, wherein each annular pressing plate 2a far away from the locking hole 7 is in a regular sector block structure; the two annular pressing plates 2b close to the locking notch 7 are similar to an O shape, and the end parts close to the locking notch 7 are contracted into a long and narrow shape so as to reduce. In addition, a plurality of strip-shaped bolt holes 2c are formed in each annular pressing plate 2a, 2b, the forming positions of the strip-shaped bolt holes correspond to the round bolt holes 1d in the curtain cloth rubber plate 1, and the size of the strip-shaped bolt holes 2c is larger than that of the round bolt holes 1d, so that each annular pressing plate 2a, 2b can be freely adjusted in the installation positions in the up, down, left and right directions.
As shown in fig. 1, the fixing unit 3 may be one or more of a common bolt, an expansion screw, and a bar-planting 5; in the embodiment, the fixing unit 3 specifically adopts a combination form of a common bolt and a planting bar 5 pre-buried in the starting hole 4; the common bolt is connected with the embedded bar 5 by penetrating the strip bolt hole 2c on the hole pressing plate 2 and the round bolt hole 1d on the cord fabric rubber plate 1, so that the hole pressing plate 2 and the cord fabric rubber plate 1 are pressed and fixed on the starting hole 4.
The beneficial effects of this embodiment lie in:
(1) The thickness of each part of the cord fabric rubber plate is consistent, and the rubber plate attached to the locking port part is in a fish tail shape, so that the steel plate attached to the locking port part can be effectively attached to play a role in sealing; the installation position of each annular pressing plate can be adjusted up and down and left and right, the shearing force of the locking port part during pushing of the jacking pipe can be avoided at the cord fabric rubber plate, and the outer wall surface of the jacking pipe is fully wrapped to prevent the cord fabric rubber plate from being torn and turned outwards.
(2) The water stopping device adopts a mode that a curtain cloth rubber plate is matched with a hole pressing plate, the breaking effect of a pipe jacking hole door is considered to be convenient in design, and the joint part is divided into an upper part and a lower part by adopting a sectional lap joint mode, so that the water stopping device is applicable to pipe jacking of various diameters.

Claims (4)

1. The utility model provides a miniature pipe curtain push bench's opening water stop device that originates from, the pipe curtain includes at least two push pipes that are connected through the fore shaft, its characterized in that water stop device includes curtain cloth rubber slab, opening clamp plate and fixed unit, the curtain cloth rubber slab set up in the opening that originates from and through opening clamp plate, fixed unit realize pressfitting, fixed, the interior contour shape of curtain cloth rubber slab with pipe curtain outline shape looks adaptation; the curtain cloth rubber plate is formed by overlapping and combining two semicircular rubber plates, and is symmetrically arranged by taking connecting lines among locking ports in the pipe curtain as axes;
the angle part of the semicircular rubber plate corresponding to each locking port is connected with a fishtail rubber plate, and the fishtail rubber plate and the steel plate wall surface on the locking port form joint seal;
the side surface of the semicircular rubber plate is connected with a lap joint rubber plate, and the lap joint rubber plate is used for lap joint of the adjacent semicircular rubber plates to form a whole;
The shape of the hole pressing plate is matched with the shape of the curtain cloth rubber plate, and the curtain cloth rubber plate is formed by combining a plurality of annular pressing plates which are arranged in an annular way.
2. The starting hole water stop device of the miniature pipe curtain push bench according to claim 1, wherein a plurality of circular bolt holes are arranged on the curtain rubber plate, strip bolt holes are arranged on the hole pressing plate at positions corresponding to the circular bolt holes, and the fixing units penetrate through the circular bolt holes and the strip bolt holes to fix the hole pressing plate and the curtain rubber plate on the starting hole wall surface.
3. The starting hole water stop device of the miniature pipe-curtain push bench according to claim 2, wherein the fixing unit is one or a combination of a plurality of common bolts, expansion screws and planted bars.
4. The starting hole water stop device of the miniature pipe-curtain push bench according to claim 3, wherein the size of the strip-shaped bolt hole is larger than that of the round bolt hole.
CN201710966985.7A 2017-10-17 2017-10-17 Originating hole water stop device of miniature pipe curtain push bench Active CN107503758B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710966985.7A CN107503758B (en) 2017-10-17 2017-10-17 Originating hole water stop device of miniature pipe curtain push bench

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710966985.7A CN107503758B (en) 2017-10-17 2017-10-17 Originating hole water stop device of miniature pipe curtain push bench

Publications (2)

Publication Number Publication Date
CN107503758A CN107503758A (en) 2017-12-22
CN107503758B true CN107503758B (en) 2024-05-14

Family

ID=60701909

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710966985.7A Active CN107503758B (en) 2017-10-17 2017-10-17 Originating hole water stop device of miniature pipe curtain push bench

Country Status (1)

Country Link
CN (1) CN107503758B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108180028A (en) * 2018-01-09 2018-06-19 上海隧道工程有限公司 Suitable for the hole circle water sealing structure and its water-stopping method of the construction of belt lock catch pipe curtain
CN109209430A (en) * 2018-10-19 2019-01-15 上海宝冶建筑工程有限公司 A kind of push pipe water stop device for opening
CN110284513A (en) * 2019-07-09 2019-09-27 中亿丰建设集团股份有限公司 It is a kind of can slip casting built-in pipe curtain sealing lock catch device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07102878A (en) * 1993-09-30 1995-04-18 Iseki Tory Tech Inc How to build an underground structure
CN101793325A (en) * 2009-01-29 2010-08-04 贺尔碧格压缩机技术控股有限公司 The seal ring of segmented
KR20130109538A (en) * 2012-03-27 2013-10-08 김청균 Multi-layer composite seals with multiple contacts
CN103410523A (en) * 2013-08-26 2013-11-27 中铁隧道集团二处有限公司 Double-layer water-stopping steel ring for shield starting tunnel portal and mounting method of double-layer water-stopping steel ring
CN203939061U (en) * 2014-07-02 2014-11-12 中铁四局集团第一工程有限公司 A kind of pipe jacking tool pipe turnover hole antipriming
CN205056076U (en) * 2015-10-16 2016-03-02 王永利 Chemistry experiment frame
CN205153210U (en) * 2015-11-25 2016-04-13 沈阳建筑大学 Easy sliding pressure type steel plate concrete restraint steel sheet shear force wall
CN105927230A (en) * 2015-11-30 2016-09-07 迟新宋 Construction method for forming pipe-roofing by single tube interlocking
CN205638461U (en) * 2016-05-26 2016-10-12 中铁四局集团第四工程有限公司 Shield constructs seal structure of portal curtain cloth rubber slab and section of jurisdiction
CN207453976U (en) * 2017-10-17 2018-06-05 上海城建市政工程(集团)有限公司 A kind of miniature tube curtain push-bench originates water stop device for opening

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07102878A (en) * 1993-09-30 1995-04-18 Iseki Tory Tech Inc How to build an underground structure
CN101793325A (en) * 2009-01-29 2010-08-04 贺尔碧格压缩机技术控股有限公司 The seal ring of segmented
KR20130109538A (en) * 2012-03-27 2013-10-08 김청균 Multi-layer composite seals with multiple contacts
CN103410523A (en) * 2013-08-26 2013-11-27 中铁隧道集团二处有限公司 Double-layer water-stopping steel ring for shield starting tunnel portal and mounting method of double-layer water-stopping steel ring
CN203939061U (en) * 2014-07-02 2014-11-12 中铁四局集团第一工程有限公司 A kind of pipe jacking tool pipe turnover hole antipriming
CN205056076U (en) * 2015-10-16 2016-03-02 王永利 Chemistry experiment frame
CN205153210U (en) * 2015-11-25 2016-04-13 沈阳建筑大学 Easy sliding pressure type steel plate concrete restraint steel sheet shear force wall
CN105927230A (en) * 2015-11-30 2016-09-07 迟新宋 Construction method for forming pipe-roofing by single tube interlocking
CN205638461U (en) * 2016-05-26 2016-10-12 中铁四局集团第四工程有限公司 Shield constructs seal structure of portal curtain cloth rubber slab and section of jurisdiction
CN207453976U (en) * 2017-10-17 2018-06-05 上海城建市政工程(集团)有限公司 A kind of miniature tube curtain push-bench originates water stop device for opening

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
矩形顶管机出始发井帘布橡胶板设计;佘清雅;杨子松;毕伟麟;吴小建;;建筑施工;20100225(02);全文 *

Also Published As

Publication number Publication date
CN107503758A (en) 2017-12-22

Similar Documents

Publication Publication Date Title
CN204266220U (en) A kind of plugging device of precipitation well in foundation pit
CN107503758B (en) Originating hole water stop device of miniature pipe curtain push bench
CN204477513U (en) A kind of push pipe starts portal water sealing structure
CN103485790A (en) Shallow tunneling method for pipe-proof-supporting structure combined system
CN210564534U (en) Rectangular pipe jacking oblique crossing construction structure
CN206916753U (en) A kind of water sealing structure of diaphram wall and its seam crossing
CN203924137U (en) Serious seepage block structure of underground continuous wall
CN102561405A (en) Opening treatment method for pipe-roofing continuous perforation
CN110700280B (en) A diversion device and construction method for foundation pit support construction in narrow areas
CN204040062U (en) Prefabricated wedge shape flexible interface assembling piping lane
CN104099946B (en) Inspection-pit between a kind of Novel top pipeline section
CN103437789B (en) Build waterproof structure, adopt the method for water proof mode constructing underground building
CN103362517A (en) Assembled jacking pipe
CN205206847U (en) Shield constructs business turn over hole portal annular and freezes sealed sealing device
CN207453976U (en) A kind of miniature tube curtain push-bench originates water stop device for opening
CN201554042U (en) Installer for diaphragm wall connector flexible water stops
CN103205986A (en) Concrete raft foundation construction-joint grouting device and construction method
CN110820803B (en) Open excavation construction method for transverse connection channel of shield tunnel
CN204456228U (en) A kind of diaphragm wall fast plugging device
CN203584437U (en) First lining structure used for constructing underground engineering and having water-resisting function
CN206941655U (en) Sand structure is gushed suitable for the diaphragm wall seam waterproof of weak rich water arenaceous stratum
CN204098067U (en) Side's culvert formula underground pipe gallery
CN207619951U (en) Structure for improving external pressure resistance stability of pressure steel pipe
CN206467651U (en) Rectangular concrete pile for building piping lane side wall
WO2022242153A1 (en) Waterproof structure for side wall and tunnel in subway main body structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant