CN218374050U - Ultra-deep underground diaphragm wall joint - Google Patents
Ultra-deep underground diaphragm wall joint Download PDFInfo
- Publication number
- CN218374050U CN218374050U CN202221929809.9U CN202221929809U CN218374050U CN 218374050 U CN218374050 U CN 218374050U CN 202221929809 U CN202221929809 U CN 202221929809U CN 218374050 U CN218374050 U CN 218374050U
- Authority
- CN
- China
- Prior art keywords
- joint
- plates
- end socket
- dog
- shaped end
- 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
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The utility model discloses an ultra-deep underground continuous wall connects, it includes groove section steel reinforcement cage, there are two connecting pieces on groove section steel reinforcement cage's the both ends side respectively, be provided with the first dog-ear shaped head reinforcing bar that is "protruding" font structure and the second dog-ear shaped head reinforcing bar that is "concave" font structure on two connecting pieces respectively, all be provided with first joint board and second joint board on two connecting pieces, first joint board and second joint inboard all are provided with removable mold, the underground continuous wall who pours the completion connects one end and is "protruding" font structure, the other end forms "concave" font structure, link to each other through the connecting piece between adjacent two sections underground continuous wall, and adjacent two sections underground continuous wall head and the tail cooperation forms socket joint formula seam structure, the infiltration route of groundwater has been increased, good water stopping performance, be applicable to the construction of the ultra-deep underground continuous wall that atress and stagnant water requirement are higher.
Description
Technical Field
The utility model relates to a dedicated sheet pile wall field of fixed building foundation engineering among ground, the structural engineering especially relates to an ultra-deep underground continuous wall connects.
Background
The underground continuous wall is a foundation engineering, and adopts a trenching machine on the ground, and under the condition of slurry wall protection, a long and narrow deep groove is excavated along the peripheral axis of the deep excavation engineering, after the groove is cleaned, a steel reinforcement cage is hung in the groove, then underwater concrete is poured by using a conduit method to construct a unit groove section, and the steps are carried out section by section, so that a continuous reinforced concrete wall is constructed underground to be used as a structure for intercepting water, preventing seepage, bearing and retaining water. It is characterized in that: the construction vibration is small, the wall rigidity is large, the integrity is good, the construction speed is high, the earth and stone space can be saved, the method can be used for constructing deep foundation pit support in dense building groups and carrying out reverse construction, and the method can be used for construction in various geological conditions including sandy soil layers and gravel layers with the particle size of less than 50 mm.
The underground continuous wall joint is a joint between unit wall sections, has the functions of water stopping, concrete blocking, stress transmission, shear resistance and the like, is divided into a rigid joint and a non-rigid joint (flexible joint) according to the stress performance in the current common joint type in engineering, and the non-rigid joint does not transmit the internal force of the wall body but can prevent seepage; the rigid joint can form an integral body by adjacent wall sections from bottom to top, and transmits internal force to each other and limits relative deformation between the adjacent wall sections. The hoisting risk of the steel reinforcement cage in the construction of the existing joint structure is large, the deformation resistance is poor, and the requirement of actual engineering can not be well met.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art, the utility model provides a pair of super dark underground continuous wall connects has solved that the resistance to deformation ability of steel reinforcement cage is relatively poor in the construction of current joint structure, can not satisfy the problem of actual engineering needs well.
In order to achieve the above object, the utility model adopts the following technical scheme:
the ultra-deep underground continuous wall joint comprises a groove section steel reinforcement cage, wherein two connecting pieces are respectively arranged on the side surfaces of two ends of the groove section steel reinforcement cage;
all be provided with first joint board and second joint board on two connecting pieces, first joint board and second joint inboard all are provided with detachable mould.
Further, as a specific selection of the two connecting pieces, the two connecting pieces are both I-shaped section steel, and the I-shaped section steel comprises a pair of wing plates arranged in parallel and a web plate arranged in the middle of the connecting wing plates; the lengths of the two I-shaped section steel are both larger than the depth of the groove section.
Furthermore, a first fold-line-shaped end socket steel bar and a second fold-line-shaped end socket steel bar are respectively arranged on two sides of the groove section steel bar cage;
the first dog-ear shaped end socket steel bar is in a convex structure, and the end part of the first dog-ear shaped end socket steel bar is fixedly connected with the side wall of the inner side wing plate of the connecting piece;
the second dog-leg-shaped end socket reinforcing steel bars are of concave structures, the second dog-leg-shaped end socket reinforcing steel bars are matched with the first dog-leg-shaped end socket reinforcing steel bars, and the second dog-leg-shaped end socket reinforcing steel bars are fixedly connected with the outer side wing plate side wall of the connecting piece.
Furthermore, the first joint plate is arranged on one side close to the first fold-line-shaped end socket reinforcing steel bar in the direction, the first joint plate comprises two first joint sub-plates which are symmetrically arranged by taking the web as a center, and the two first joint sub-plates are fixedly connected with two side surfaces of the web or two side surfaces of the end part of the first fold-line-shaped end socket reinforcing steel bar;
the two first joint sub-plates are fixed and then are in a concave structure with an opening facing the direction of the first fold-line-shaped seal head reinforcing steel bar; the two first joint sub-plates are of a hollow structure with a closed circumferential direction, and the distance between the two outer side surfaces of the two first joint sub-plates is equal to the width of the groove section;
the two first joint sub-plates are internally provided with detachable dies with the shapes matched with the first joint sub-plates, and the length of each detachable die is larger than the depth of each groove section.
Furthermore, the second joint plate is arranged on one side close to the second fold-line-shaped end socket steel bar in the direction, and comprises two second joint sub-plates which are symmetrically arranged by taking the web as a center, and the two second joint sub-plates are fixedly connected with two side surfaces of the web or two side surfaces of the end part of the second fold-line-shaped end socket steel bar; the two second joint sub-plates are of a hollow structure with a closed circumferential direction, and the distance between the two outer side surfaces of the two second joint sub-plates is equal to the width of the inside of the second fold-line-shaped end socket reinforcing steel bar;
the two second joint sub-plates are internally provided with detachable dies with the shapes matched with the second joint sub-plates, and the length of each detachable die is larger than the depth of each groove section.
The utility model discloses a construction rationale does: before constructing the ultra-deep underground diaphragm wall joint in the scheme, firstly, excavating a long and narrow deep groove on the peripheral axis of a deep excavation project, then manufacturing a groove section reinforcement cage of a current groove section, arranging a first fold line-shaped seal head reinforcement bar in a convex structure and a second fold line-shaped seal head reinforcement bar in a concave structure at two ends of the groove section reinforcement cage of the current groove section respectively, and welding wing plate side walls of two connecting pieces with the end parts of the first fold line-shaped seal head reinforcement bar and the second fold line-shaped seal head reinforcement bar respectively; then welding and fixing two first connector sub-plates and two side surfaces of a web plate or two side surfaces of the end part of a first fold-line-shaped end socket steel bar, and welding and fixing two second connector sub-plates and two side surfaces of the web plate or two side surfaces of the end part of a second fold-line-shaped end socket steel bar; then hoisting the manufactured steel reinforcement cage of the groove section into the excavated groove section; before the groove section steel reinforcement cage is poured, detachable molds are arranged inside the first joint plate and the second joint plate, and the important function of stopping concrete from leaking is achieved; and finally, pouring concrete into the steel reinforcement cage at the groove section, dismantling the detachable mould after the concrete is solidified to form the underground continuous wall at the current section, and excavating the groove section close to the underground continuous wall at the next section after the pouring of the underground continuous wall at the current section is finished.
One end of the poured underground continuous wall is of a convex structure, the other end of the poured underground continuous wall is of a concave structure, two adjacent sections of underground continuous walls are connected through connecting pieces, and the two adjacent sections of underground continuous walls are matched end to form a socket joint type seam structure.
In the construction, the H-shaped section steel is inserted into the bottom plane of the groove section, and the total height of the H-shaped section steel is greater than the depth of the groove section. And the bending angles and the length sizes of the first fold-line-shaped end socket reinforcing steel bars and the second fold-line-shaped end socket reinforcing steel bars are determined according to field lofting. Once the construction of the combined joint of the I-shaped section steel and the detachable mould is finished, the mould is detached after the concrete is poured, and the I-shaped section steel is permanently buried in the soil as a part of the underground continuous wall without being pulled out like a fore shaft pipe or a joint box.
The utility model has the advantages that:
1. the utility model provides a pair of ultra-deep underground continuous wall connects because the joint part uses socket joint formula seam form as the basis, has increased the infiltration route of groundwater, and the stagnant water performance is good, is applicable to the construction that atress and stagnant water required higher ultra-deep underground continuous wall. The I-shaped section steel is required to be inserted into the bottom plane of the groove section for a certain distance, and the purpose is to prevent concrete of the groove section in a first period from flowing around from the bottom of the groove section and entering the groove section of the next section of underground continuous wall, so that the groove forming construction of the groove section of the next section of underground continuous wall is influenced. Because groove section steel reinforcement cage top is equipped with first dog-ear shape head reinforcing bar and second dog-ear shape head reinforcing bar to the angle of buckling size is confirmed according to the field lofting, and can make the detachable mould of different forms according to different needs, can guarantee to form between each wall section and sharply connect or the non-linear connection. Therefore, the joint has wider application range and is suitable for the construction of diaphragm walls under various conditions.
2. The utility model provides a pair of ultra-deep underground continuous wall connects, in the work progress, the process of fore shaft pipe or joint case is pulled out in the construction stage has been avoided, the construction degree of difficulty has been reduced, and simultaneously, adopt removable mold can play the important role that blocks concrete and leak thick liquid, pour I shaped steel weak point together, removable mold can guarantee the seam better and do not take place to warp, full play I shape cross-section shaped steel's performance, in order to keep spigot and socket joint formula seam shape, make construction quality obtain guaranteeing, this joint belongs to rigid joint simultaneously, the structural integrity and the prevention of seepage reliability that the groove section of underground continuous wall is connected have been increased, the anti deformability of groove section steel reinforcement cage in this joint has been improved.
Drawings
Fig. 1 is a schematic structural view of an ultra-deep underground diaphragm wall joint.
Fig. 2 is a continuous sectional view of the ultra-deep underground diaphragm wall joint before form removal.
Fig. 3 is a continuous sectional view of the ultra-deep underground diaphragm wall joint after the form removal.
Fig. 4 is a continuous sectional view of the ultra-deep underground diaphragm wall joint after reinforcement.
Wherein, 1, a groove section reinforcement cage; 2. a connecting member; 3. a first joint plate; 301. a first joint sub-plate; 4. a second joint plate; 401. a second joint sub-plate; 5. the mould can be disassembled; 6. first fold-line-shaped end socket steel bars; 7. and (5) second fold line shaped end socket reinforcing steel bars.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.
As shown in fig. 1-4, the utility model provides an ultra-deep underground continuous wall connects, including groove section steel reinforcement cage 1, there are two connecting pieces 2 on the both sides face of groove section steel reinforcement cage 1 respectively.
Specifically, the two connecting pieces 2 are both I-shaped section steel, and the I-shaped section steel comprises a pair of wing plates arranged in parallel and a web plate arranged in the middle of the connecting wing plates; the lengths of the two I-shaped section steel sections are both larger than the depth of the groove section.
A first fold-line-shaped end socket steel bar 6 and a second fold-line-shaped end socket steel bar 7 are respectively arranged on two sides of the groove section steel bar cage 1; the first dog-ear shaped end socket reinforcing steel bars 6 are in a convex structure, and the end parts of the first dog-ear shaped end socket reinforcing steel bars 6 are fixedly connected with the side wall of the inner side wing plate of the connecting piece 2; the second fold-line-shaped end socket reinforcing steel bars 7 are of a concave structure, the second fold-line-shaped end socket reinforcing steel bars 7 are matched with the first fold-line-shaped end socket reinforcing steel bars 6, and the second fold-line-shaped end socket reinforcing steel bars 7 are fixedly connected with the outer side wing plate side wall of the connecting piece 2.
All be provided with first joint board 3 and second joint board 4 on two connecting pieces 2, all be provided with removable mold 5 in first joint board 3 and the second joint board 4.
As a specific arrangement mode of the first joint plate 3 and the second joint plate 4, the first joint plate 3 is arranged on one side close to the first fold-line-shaped end socket reinforcing steel bar 6 in the direction, the first joint plate 3 comprises two first joint sub-plates 301 which are symmetrically arranged by taking a web as a center, and the two first joint sub-plates 301 are fixedly connected with two side surfaces of the web or two side surfaces of the end part of the first fold-line-shaped end socket reinforcing steel bar 6;
the two first joint sub-plates 301 are fixed and then are in a concave structure with the opening facing the direction of the first fold-line-shaped end socket reinforcing steel bar 6; the two first joint sub-plates 301 are of a hollow structure with a closed circumferential direction, and the distance between the two outer side surfaces of the two first joint sub-plates 301 is equal to the width of the groove section;
the two first joint sub-plates 301 are internally provided with detachable dies 5 with shapes matched with the first joint sub-plates, and the length of each detachable die 5 is larger than the depth of each groove section.
The second joint plate 4 is arranged on one side close to the second fold-line-shaped end socket reinforcing steel bar 7 in the direction, the second joint plate 4 comprises two second joint sub-plates 401 symmetrically arranged by taking the web as a center, and the two second joint sub-plates 401 are fixedly connected with two side faces of the web or two side faces of the end part of the second fold-line-shaped end socket reinforcing steel bar 7; the two second joint sub-plates 401 are of a hollow structure with a closed circumferential direction, and the distance between the two outer side surfaces of the two second joint sub-plates 401 is equal to the width of the interior of the second fold-line-shaped end socket reinforcing steel bar 7;
the two second joint sub-plates 401 are internally provided with detachable dies 5 with shapes matched with the shapes of the two second joint sub-plates, and the length of each detachable die 5 is larger than the depth of each groove section.
Before constructing the ultra-deep underground diaphragm wall joint in the scheme, firstly, excavating a long and narrow deep groove on the peripheral axis of a deep excavation project, then manufacturing a groove section reinforcement cage 1 of a current groove section, arranging a first fold line-shaped end enclosure reinforcement 6 in a convex structure and a second fold line-shaped end enclosure reinforcement 7 in a concave structure at two ends of the groove section reinforcement cage 1 of the current groove section respectively, and determining the bending angle size of the first fold line-shaped end enclosure reinforcement 6 and the second fold line-shaped end enclosure reinforcement 7 according to field lofting;
then, welding the side walls of the wing plates of the two connecting pieces 2 with the end parts of the first fold-line-shaped end socket reinforcing steel bars 6 and the second fold-line-shaped end socket reinforcing steel bars 7 respectively;
then, welding and fixing the two first joint sub-plates 301 and the two side surfaces of the web plate or the two side surfaces of the end part of the first fold-line-shaped end socket steel bar 6, and welding and fixing the two second joint sub-plates 401 and the two side surfaces of the web plate or the two side surfaces of the end part of the second fold-line-shaped end socket steel bar 7; then hoisting the manufactured steel reinforcement cage 1 of the groove section into the excavated groove section; when the groove section steel reinforcement cage 1 is hoisted, the I-shaped section steel is required to be inserted into the bottom plane of the groove section for a certain distance, and the total height of the I-shaped section steel is larger than the depth of the groove section, so that the concrete of the groove section of the current section can be prevented from flowing around from the bottom of the groove section and entering the groove section of the next section of underground continuous wall, and the groove forming construction of the groove section of the next section of underground continuous wall can be influenced.
Before the groove section reinforcement cage 1 is poured, detachable molds 5 are arranged inside the first joint plate 3 and the second joint plate 4, so that the important function of stopping concrete from leaking is achieved, and the shape of a spigot-and-socket joint is kept; and finally, pouring concrete into the groove section reinforcement cage 1, dismantling the detachable mould 5 after the concrete is solidified to form the underground continuous wall of the current section, and excavating the groove section close to the underground continuous wall of the next section after the pouring of the underground continuous wall of the current section is finished.
The mould is dismantled after the concrete is poured, the I-shaped section steel does not need to be pulled out like a fore shaft pipe or a joint box, and the I-shaped section steel is permanently buried in the soil as part of the underground continuous wall, so that the process of pulling out the fore shaft pipe or the joint box in the construction stage is avoided, and the construction difficulty is reduced.
One end of the poured underground continuous wall is of a convex structure, the other end of the poured underground continuous wall is of a concave structure, two adjacent sections of underground continuous walls are connected through a connecting piece 2 (namely H-shaped section steel), and the two adjacent sections of underground continuous walls are matched end to form a socket joint type joint structure, so that the permeation path of underground water can be increased, the water-stopping performance is good, and the detachable mould 5 can play an important role in stopping concrete slurry leakage to keep the socket joint type joint shape, so that the construction quality is guaranteed.
If the socket joint type joint structure between two adjacent sections of underground continuous walls needs to be reinforced, the high-pressure jet grouting piles can be constructed at the socket joint type joint structure for reinforcement, and water seepage at the socket joint type joint structure is prevented.
According to the ultra-deep underground diaphragm wall joint, the form that the detachable mould 5 is combined with the I-shaped section steel is adopted, the defects that the joint only utilizes the soil body around the diaphragm wall to serve as a template in the past, concrete leaks in the pouring process, and the I-shaped steel is poured together are overcome in the construction process, the detachable mould 5 can better ensure that the joint does not deform, and the performance of the I-shaped section steel is fully exerted.
Claims (5)
1. The ultra-deep underground diaphragm wall joint is characterized by comprising a groove section steel reinforcement cage, wherein two connecting pieces are respectively arranged on the side surfaces of two ends of the groove section steel reinforcement cage;
and the first joint plate and the second joint plate are arranged on the connecting piece, and detachable dies are arranged in the first joint plate and the second joint plate.
2. The ultra-deep underground diaphragm wall joint as claimed in claim 1, wherein both of the connecting members are i-section steel, the i-section steel including a pair of wing plates arranged in parallel and a web plate arranged in the middle of the connecting wing plates; the lengths of the two I-shaped section steel sections are both larger than the depth of the groove section.
3. The ultra-deep underground diaphragm wall joint of claim 2, wherein a first dog-ear shaped head reinforcing steel bar and a second dog-ear shaped head reinforcing steel bar are respectively arranged on two sides of the groove section reinforcing cage;
the first dog-ear shaped end socket steel bar is of a convex structure, and the end part of the first dog-ear shaped end socket steel bar is fixedly connected with the side wall of the inner side wing plate of the connecting piece;
the second dog-leg-shaped end socket reinforcing steel bars are of concave structures, the second dog-leg-shaped end socket reinforcing steel bars are matched with the first dog-leg-shaped end socket reinforcing steel bars, and the second dog-leg-shaped end socket reinforcing steel bars are fixedly connected with the outer side wing plate side wall of the connecting piece.
4. The ultra-deep underground continuous wall joint according to claim 3, wherein the first joint plate is arranged at one side close to the first dog-leg shaped end socket reinforcing steel bar, the first joint plate comprises two first joint sub-plates which are symmetrically arranged by taking the web as a center, and the two first joint sub-plates are fixedly connected with two side surfaces of the web or two side surfaces of the end part of the first dog-leg shaped end socket reinforcing steel bar;
the two first joint sub-plates are fixed and then are in a concave structure with an opening facing the direction of the first fold-line-shaped seal head reinforcing steel bar; the two first joint sub-plates are of a hollow structure with a closed circumferential direction, and the distance between the two outer side surfaces of the two first joint sub-plates is equal to the width of the groove section;
the two first joint sub-plates are internally provided with detachable dies with shapes matched with the first joint sub-plates, and the length of each detachable die is larger than the depth of each groove section.
5. The ultra-deep underground continuous wall joint according to claim 4, wherein the second joint plate is arranged at one side close to the second fold-line-shaped end socket reinforcing steel bars, the second joint plate comprises two second joint sub-plates which are symmetrically arranged by taking the web as a center, and the two second joint sub-plates are fixedly connected with two side surfaces of the web or two side surfaces of the end part of the second fold-line-shaped end socket reinforcing steel bars; the two second joint sub-plates are of a hollow structure with a closed circumferential direction, and the distance between the two outer side surfaces of the two second joint sub-plates is equal to the width of the interior of the second fold-line-shaped end socket reinforcing steel bar;
the two second joint sub-plates are internally provided with the detachable dies with the shapes matched with the shapes of the two second joint sub-plates, and the length of each detachable die is larger than the depth of each groove section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221929809.9U CN218374050U (en) | 2022-07-25 | 2022-07-25 | Ultra-deep underground diaphragm wall joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221929809.9U CN218374050U (en) | 2022-07-25 | 2022-07-25 | Ultra-deep underground diaphragm wall joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218374050U true CN218374050U (en) | 2023-01-24 |
Family
ID=84964265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221929809.9U Active CN218374050U (en) | 2022-07-25 | 2022-07-25 | Ultra-deep underground diaphragm wall joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218374050U (en) |
-
2022
- 2022-07-25 CN CN202221929809.9U patent/CN218374050U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103343538B (en) | Supporting and construction method of steel sheet pile under soft foundation of high flow plastic deep layer | |
| CN215052898U (en) | Novel underground continuous wall | |
| CN103321246B (en) | Underground diaphragm wall based foundation pit construction method | |
| CN106677205A (en) | Fabricated special-shaped steel pipe pile combined retaining wall | |
| CN107217676A (en) | A kind of steel cylinder with seal groove and occlusion structure or steel sheet pile and steel construction diaphragm wall | |
| CN110331727A (en) | The supporting construction and construction method that bored concrete pile and diaphram wall combine | |
| CN112144509A (en) | Construction method of underground continuous wall, joint and connection structure thereof | |
| CN218374050U (en) | Ultra-deep underground diaphragm wall joint | |
| CN104499489B (en) | Foundation pit construction method | |
| CN110359471B (en) | Anti-seepage damage structure of strong water-permeable sandy soil layer of underwater tunnel and construction method | |
| CN104480945B (en) | A kind of foundation ditch reversed construction method | |
| CN210263015U (en) | Prefabricated wall unit for underground continuous wall | |
| CN211873023U (en) | Foundation pit supporting device | |
| CN104790430B (en) | Construction method of underground continuous wall | |
| CN207904990U (en) | A kind of groutable underground continuous wall connector | |
| CN111980046A (en) | Underground continuous wall and construction method thereof | |
| CN218204320U (en) | Novel jointless integrally-poured underground continuous wall | |
| CN208917843U (en) | The diaphragm wall foundation pit that the steel cylinder or steel sheet pile of a kind of seal groove and occlusion structure are constituted is with going along with sb. to guard him | |
| CN214271999U (en) | Different cross-sectional dimension ground is wall joint even | |
| CN111119200A (en) | Foundation pit supporting device | |
| CN114855766B (en) | Construction method of revetment lattice type underground continuous wall structure | |
| CN217601407U (en) | Novel embedded underground continuous wall | |
| CN211036963U (en) | Cast-in-place and prefabricated underground continuous wall that combines together lead wall | |
| CN205399436U (en) | Excavation supporting system | |
| CN213625548U (en) | Multi-combination mode ground is wall joint construction equipment even |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |