CN211006691U - Removable supporting structure that trades of deep basal pit - Google Patents
Removable supporting structure that trades of deep basal pit Download PDFInfo
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- CN211006691U CN211006691U CN201921760258.6U CN201921760258U CN211006691U CN 211006691 U CN211006691 U CN 211006691U CN 201921760258 U CN201921760258 U CN 201921760258U CN 211006691 U CN211006691 U CN 211006691U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 241000761557 Lamina Species 0.000 claims 1
- 238000010276 construction Methods 0.000 description 34
- 230000000149 penetrating effect Effects 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a removable supporting structure that props that trades of deep basal pit relates to building engineering supporting structure's technical field, it includes the basement outer wall and follows a plurality of fender piles that the basement outer wall set up, a plurality of fender pile up end are provided with the hat roof beam of direction of arranging along a plurality of fender piles jointly, the interval is provided with a plurality of strutting arrangement that trade between basement outer wall and the fender pile, it includes can dismantle "L" style of calligraphy support of rigid coupling on the basement outer wall to trade the strutting arrangement, the I-steel that is fixed with the level and sets up can be dismantled to the up end of support horizontal segment, the one end that the I-steel is close to a fender pile is provided with the supporting mechanism who is used for and closes on the fender pile butt, the utility model discloses a can dismantle the support that sets up and the I-steel and be used for carrying out the supporting mechanism that the butt supported to a fender pile, realize trading and prop up reuse and convenient the dismantlement.
Description
Technical Field
The utility model belongs to the technical field of the technique of building engineering supporting construction and specifically relates to a removable supporting construction that trades of deep basal pit is related to.
Background
The construction of deep foundation is an extremely important link in the construction of large-scale and high-rise buildings, and the supporting technology of deep foundation pit and the dismantling technology of support are undoubtedly the key to ensure the safety of deep foundation pit and the smooth construction of main buildings. The support replacement in the deep foundation pit engineering refers to that a certain technical measure is adopted to gradually replace an internal support structure system which plays a role of temporary support under specific conditions, so that the engineering can be safely and continuously carried out with quality guarantee after the temporary support is dismantled, and the essence is safe and orderly adjustment, transfer and redistribution of stress. The support replacement principle is that partial stress generated by the support pile in the process of removing the inner support is transmitted to a third party with enough bearing capacity through a force transmission component, namely, the structure of a basement outer wall and the like which is constructed and reaches certain strength is achieved, so that new stress balance is achieved.
Traditional trade props mostly and fills the backfill with lime-soil earlier between the braced wall and with the basement outer wall, again with the many design 300 thick plain concrete slabs of structural slab parallel and level department. The support replacing structure is complicated in process and difficult in actual operation, the safety of a foundation pit enclosure system structure is poor, the construction period is seriously influenced, the maintenance period of concrete is long, and the construction period is prolonged.
Patent publication No. is CN 204080820U's chinese patent, has proposed a concrete structure foundation ditch and has traded propping device, including a ejector pin and wailing, wailing installs the basement outer wall lateral wall at corresponding basement floor, and wailing is installed equally to the fender pile lateral wall that corresponds wailing, and the basement outer wall is with two wails of wailing side wall installation evenly spaced setting up an ejector pin between. The utility model discloses a simple structure, design scientific and reasonable, change the fagging area with traditional concrete and compare, the construction is convenient, and the time limit for a project reduces greatly.
The above prior art solutions have the following problems: after the construction of the support replacing device is completed, along with the continuous construction of the basement, the backfill and the tamping are needed between the outer wall of the basement and the support piles, the tamping construction of the backfill is inconvenient due to the influence of the support jacking rod, and the construction efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a removable support supporting construction that trades of deep basal pit convenient to backfill soil tamp.
The utility model aims at realizing through the following technical scheme:
the utility model provides a removable supporting construction that props that trades of deep basal pit, includes basement outer wall and follows a plurality of fender piles that basement outer wall set up, it is a plurality of the fender pile up end is provided with jointly along a plurality of the crown beam of the direction is arranged to the fender pile, basement outer wall with the interval is provided with a plurality of strutting arrangement that trade between the fender pile, it is in including dismantling the rigid coupling to trade strutting arrangement "L" style of calligraphy support on the basement outer wall, the I-steel that is fixed with the level and sets up can be dismantled to the up end of support horizontal segment, the I-steel is close to the one end of fender pile is provided with and is used for and closes on the supporting mechanism of fender pile butt.
By adopting the technical scheme, when the support replacement device is required to be arranged between the basement outer wall and the support piles, the plurality of supports are arranged on the basement outer wall at equal intervals, the I-shaped steel is horizontally arranged on the supports, and the I-shaped steel supports the basement outer wall and the support piles through the support mechanism; after the engineering construction of basement outer wall inboard is accomplished, can remove bearing structure and fender pile's butt earlier, demolish I-steel and support in proper order again, realize trading strutting arrangement's reuse, it is more convenient when carrying out backfill soil tamping operation again between basement outer wall and fender pile this moment, reduced the construction degree of difficulty, also saved construction cost simultaneously.
Further setting the following steps: the supporting mechanism comprises a jack horizontally and fixedly connected to a web plate of the I-shaped steel, and a butt plate is detachably fixed to the end portion of a piston rod of the jack.
By adopting the technical scheme, after the I-shaped steel is arranged on the support, the abutting connection of the abutting connection plate and the supporting pile can be realized by adjusting the piston rod of the jack, so that the supporting mechanism can effectively abut and support the supporting pile; and the arrangement of the jack enables the actual supporting length of the support changing device to be adjustable, and the practicability of the support changing device is further improved.
Further setting the following steps: the jack is characterized in that a threaded hole is formed in the end portion of a piston rod of the jack, a counter sink hole penetrates through the abutting plate, and a mounting bolt in threaded connection with the threaded hole penetrates through the counter sink hole.
By adopting the technical scheme, the abutting plate is bolted and fixed on the piston rod of the jack through the mounting bolt, so that the abutting plate which is fit and matched with the outer wall of the supporting pile can be replaced according to the supporting piles with different diameters, and the stability of abutting of the supporting mechanism and the supporting pile is ensured; and set up the heavy platform hole and can effectively avoid construction bolt and fender pile direct contact, avoided the uneven possibility of butt board atress.
Further setting the following steps: the I-steel is vertically and fixedly connected with a supporting plate between two wing plates of the I-steel, the lower portion of the supporting plate is fixedly connected with a web plate of the I-steel, the jack is fixedly connected to the supporting plate, a plurality of rib plates are fixedly connected to one side, far away from the jack, of the supporting plate in a vertical mode, and the rib plates are fixedly connected with the web plate of the I-steel.
Through adopting above-mentioned technical scheme, when the jack was installed in the backup pad, a plurality of floors supported the backup pad, and then ensured the high strength connection of jack and I-steel to realize trading the effective support of propping the device to basement outer wall and fender pile.
Further setting the following steps: and one side of the abutting plate, which is far away from the I-shaped steel, is provided with a dynamometer.
Through adopting above-mentioned technical scheme, the dynamometer can calculate and trade the axial stress that props the device and be born when supporting the basement outer wall, compares a plurality of dynamometer measurement's numerical value, can judge in real time trading the overall structure stability who props supporting construction to in time make the adjustment.
Further setting the following steps: one side that the butt joint board is kept away from the I-steel with the I-steel is close to one side of basement outer wall all is provided with the blotter.
Through adopting above-mentioned technical scheme, the blotter can multiplicable I-steel and the area of contact between the low room outer wall, still can provide the protection for the butt support of I-steel and butt joint board simultaneously to reduce the wearing and tearing of I-steel and butt joint board.
Further setting the following steps: the support is provided with at least two I-beams, and a plurality of fastening assemblies are arranged between every two adjacent I-beams.
Through adopting above-mentioned technical scheme, a plurality of I-steel have further increased the structural strength who trades and prop the device for trade and prop supporting construction and can support for deep basal pit large stress support and provide effectively trading and prop, further expanded the application scope who trades and prop supporting construction.
Further setting the following steps: the fastening assembly comprises a fastener shaped like a Chinese character 'ji', the length of the middle horizontal section of the fastener is twice of the thickness of a wing plate of the I-shaped steel, through holes are arranged on the horizontal sections on two sides of the fastener in a penetrating mode, a plurality of through holes are arranged on a web plate of the I-shaped steel in a penetrating mode, and the fastener is connected and fixed on two adjacent I-shaped steels through bolts penetrating through the through holes and bolts of nuts.
Through adopting above-mentioned technical scheme, two adjacent I-beams install the back on the support, through the fastener with two adjacent I-beams adjacent the inserted connection of pterygoid lamina carry out preliminary fixed to two adjacent I-beams, the bolted connection of rethread bolt and nut is consolidated connection to two adjacent I-beams for two adjacent I-beams form a whole, so trade and prop the internal stress that the device can be received bigger.
To sum up, the utility model discloses a beneficial technological effect does:
1. the abutting connection of the abutting connection plate and the supporting pile is achieved by adjusting a piston rod of the jack, so that the supporting mechanism can effectively abut and support the supporting pile, when the support replacing device needs to be detached, only the jack needs to be adjusted to remove the abutting connection of the piston rod of the jack and the supporting pile, and then the I-shaped steel and the support are sequentially detached, so that the backfilling and tamping operation between the outer wall of the basement and the supporting pile is more convenient, the construction difficulty is reduced, and the construction cost is saved;
2. the arrangement of the jack enables the actual supportable length of the support changing device to be adjustable, and the practicability of the support changing device is further improved;
3. a plurality of I-steel pass through fastening components and consolidate the connection, have increased the structural strength who trades and prop the device for trade and prop supporting construction and can support for deep basal pit large stress support and provide effectively trading and prop the support, further expanded the application scope who trades and prop supporting construction.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged partial schematic view of portion B of FIG. 1;
fig. 4 is a schematic structural view of the support changing device of the present invention.
Reference numerals: 1. a basement exterior wall; 2. supporting piles; 3. a crown beam; 4. a support; 5. i-shaped steel; 6. a jack; 7. a butt joint plate; 8. a threaded hole; 9. sinking a platform hole; 10. installing a bolt; 11. a support plate; 12. a rib plate; 13. a force gauge; 14. a cushion pad; 15. a fastener; 18. a guard plate; 20. a waist circular groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 3, for the utility model discloses a removable supporting structure that props that trades of deep basal pit, including basement outer wall 1 and along a plurality of fender pile 2 that basement outer wall 1 set up, a plurality of fender pile 2 up end are provided with the crown beam 3 of arranging the direction along a plurality of fender pile 2 jointly, basement outer wall 1 and fender pile 2 are provided with a plurality of devices that trade at the interval between, the interval that adjacent trades between the device is the integral multiple of fender pile 2 stake interval, trade the device and include can dismantle "L" style of calligraphy support 4 of rigid coupling on basement outer wall 1 (as shown in fig. 2), support 4 is bolted and is fixed on basement outer wall 1 through expansion bolts, the I-steel 5 that is fixed with the level and sets up can be dismantled to the up on the up end of support 4 horizontal segment, I-steel 5 sets up one at least, I-steel 5 selects for two in this embodiment, I-steel 5 is close to the one end of fender pile 2 and is provided with the supporting mechanism that is used for the fender pile 2 that closes on with the fender pile 2 that can dismantle, supporting mechanism includes jack 6 on the web of horizontal rigid coupling, jack 6 chooses for use the stronger axial performance and the peripheral wall that can dismantle the jack 6 butt of this embodiment, there.
When a replacement support device needs to be arranged between the basement outer wall 1 and the support pile 2, a plurality of supports 4 are arranged on the basement outer wall at equal intervals, I-shaped steel 5 is horizontally arranged on the supports 4, and the abutting plate 7 is abutted to the support pile 2 by adjusting a piston rod of a jack 6, so that the support pile 2 is effectively abutted and supported by a support mechanism; the I-shaped steel 5 and the jack 6 have extremely strong axial pressure resistance, so that the support replacing device can effectively support the basement outer wall 1 and the support pile 2; after the engineering construction of basement outer wall 1 inboard is accomplished, can adjust jack 6 earlier in order to remove butt board 7 and fender pile 2's butt, demolish I-steel 5 and support 4 in proper order again, realized trading and prop up reuse of device, it is more convenient when carrying out backfill tamping operation again between basement outer wall 1 and fender pile 2 this moment, has reduced the construction degree of difficulty, has also saved construction cost simultaneously.
Set up jack 6 and make the reality that trades the device that props to support adjustable length, further increased the practicality of trading the device that props, and set up a plurality of I-steel 5 and further increased the structural strength who trades the device that props for trade and prop supporting construction and can support for deep basal pit large stress is strutted and provide effectively trading and prop, further expanded the application scope who trades and prop supporting construction.
Referring to fig. 2, two L-shaped guard plates 18 are slidably disposed on the upper end surface of the horizontal section of the bracket 4, a plurality of waist-shaped slots 20 are horizontally disposed on the vertical section of the guard plates 18, bolts penetrating through the waist-shaped slots 20 are initially disposed on the wing plates of the i-beams 5 close to the guard plates 18, the i-beams 5 are in bolted connection with the guard plates 18 through bolted connection of the bolts and nuts, a sliding slot (not shown) perpendicular to the length direction of the i-beams 5 is disposed on the horizontal section of the bracket 4, bolts penetrating through the sliding slot are disposed on the horizontal section of the guard plates 18, and the guard plates 18 smoothly slide on the bracket 4 through sliding of the bolts in the sliding slot and are bolted and fixed on the bracket 4 through bolted connection of the bolts and the nuts.
After the I-shaped steel 5 is erected on the horizontal section of the support 4, the two guard plates 18 are slid on the support 4, so that the guard plates 18 are attached to wing plates of the two I-shaped steels 5 which are far away from each other, and then nuts on the horizontal section of the guard plates 18 are rotated to fix the guard plates 18 on the support 4, so that the guard plates 18 can realize effective limiting on the I-shaped steel 5; the guard plate 18 and the adjacent wing plates are bolted and fixed through bolts penetrating through the waist circular grooves 20, the waist circular grooves 20 are arranged, so that the I-shaped steel 5 can support the basement outer wall 1 and the support piles 2 conveniently, stress is not transmitted to the guard plate 18 and the support 4 after the I-shaped steel 5 bears excessive internal stress, mechanical damage is avoided, and the I-shaped steel 5 and the support 4 are convenient to disassemble.
Referring to fig. 3 and 4, a support plate 11 is vertically welded and fixed between two wing plates of the i-beam 5, the lower part of the support plate 11 is welded and fixed with a web of the i-beam 5, a jack 6 is fixedly connected on the support plate 11, a plurality of rib plates 12 are vertically welded and fixed on one side of the support plate 11 far away from the jack 6, and the rib plates 12 are welded and fixed with the web of the i-beam 5; the piston rod end of the jack 6 is provided with a threaded hole 8, a counter sink hole 9 penetrates through the butt plate 7, and a mounting bolt 10 in threaded connection with the threaded hole 8 penetrates through the counter sink hole 9.
When the jack 6 is arranged on the support plate 11, the plurality of rib plates 12 support the support plate 11, so that high-strength connection between the jack 6 and the I-shaped steel 5 is ensured, and the support replacing device can effectively support the basement outer wall 1 and the support piles 2; the abutting plate 7 is bolted and fixed on a piston rod of the jack 6 through a mounting bolt 10, so that the abutting plate 7 which is in fit with the outer wall can be replaced according to the support piles 2 with different diameters, and the stability of abutting of the support mechanism and the support piles 2 is ensured; and the arrangement of the counter sink hole 9 can effectively avoid the direct contact of the mounting bolt 10 and the support pile 2, and reduce the possibility of uneven stress of the butt plate 7.
Referring to fig. 4, a dynamometer 13 is attached to one side, away from the i-steel 5, of the abutting plate 7, the dynamometer 13 is a pressure dynamometer 13 commonly used in the field, a cushion pad 14 is attached to one side, away from the i-steel 5, of the abutting plate 7 and one side, close to the basement exterior wall 1, of the i-steel 5, and a notch is reserved in the dynamometer 13 of the cushion pad 14. The cushion pad 14 can increase the contact area between the I-steel 5 and the outer wall of the low room, and simultaneously can provide protection for the abutting support of the I-steel 5 and the abutting plate 7 so as to reduce the abrasion of the I-steel 5 and the abutting plate 7; the dynamometer 13 can calculate the axial stress that the device that trades props and is born when supporting basement outer wall 1, compares the numerical value that a plurality of dynamometers 13 calculate, can judge in real time the overall structure stability who trades and prop supporting construction to in time make the adjustment.
Referring to fig. 2, a plurality of fastening assemblies are arranged between two adjacent i-beams 5, each fastening assembly comprises a fastener 15 shaped like a Chinese character 'ji', the length of the middle horizontal section of each fastener 15 is twice of the thickness of a wing plate of each i-beam 5, through holes (not shown in the figure) are formed in the horizontal sections at two sides of each fastener 15, a plurality of through holes (not shown in the figure) are formed in a web plate of each i-beam 5, and each fastener 15 is fixed on the two adjacent i-beams 5 through bolt connection of bolts and nuts penetrating through the through holes and the through holes.
After two adjacent I-beams 5 are installed on support 4, the adjacent two I-beams 5 are preliminarily fixed through the splicing connection of fastener 15 and two adjacent wing plates of two adjacent I-beams 5, and the adjacent two I-beams 5 are connected in a reinforcing manner through the bolting connection of bolts and nuts, so that the two adjacent I-beams 5 form a whole, and the internal stress of the support device can be greater.
The implementation principle and the beneficial effects of the embodiment are as follows:
when a support replacing device needs to be arranged between the basement outer wall 1 and the support piles 2, a plurality of supports 4 are arranged on the basement outer wall at equal intervals, I-shaped steel 5 is horizontally arranged on the supports 4, the I-shaped steel 5 supports the basement outer wall 1 and the support piles 2 through jacks 6, the I-shaped steel 5 and the jacks 6 have strong axial pressure resistance, and therefore the support replacing device can effectively support the basement outer wall 1 and the support piles 2; after the engineering construction of basement outer wall 1 inboard is accomplished, can adjust jack 6 earlier in order to remove butt board 7 and fender pile 2's butt, demolish I-steel 5 and support 4 in proper order again, realize trading and prop up reuse of device, it is more convenient when carrying out backfill tamping operation again between basement outer wall 1 and fender pile 2 this moment, has reduced the construction degree of difficulty, has also saved construction cost simultaneously.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The detachable support-changing supporting structure for the deep foundation pit comprises a basement outer wall (1) and a plurality of supporting piles (2) arranged along the basement outer wall (1), wherein the upper end faces of the supporting piles (2) are jointly provided with crown beams (3) arranged along the plurality of supporting piles (2), and the detachable support-changing supporting structure is characterized in that a plurality of support-changing devices are arranged between the basement outer wall (1) and the supporting piles (2) at intervals, each support-changing device comprises an L-shaped support (4) detachably and fixedly connected to the basement outer wall (1), the upper end face of the horizontal section of each support (4) is detachably fixed with an I-shaped steel (5) arranged horizontally, and one end, close to the supporting pile (2), of each I-shaped steel (5) is provided with a supporting mechanism used for being abutted against the adjacent supporting pile (2).
2. The detachable support supporting structure that trades of deep basal pit of claim 1 characterized in that: the supporting mechanism comprises a jack (6) horizontally and fixedly connected to a web plate of the I-shaped steel (5), and a butt plate (7) is detachably fixed to the end portion of a piston rod of the jack (6).
3. The detachable support supporting structure that trades of deep basal pit of claim 2 characterized in that: the jack is characterized in that a threaded hole (8) is formed in the end portion of a piston rod of the jack (6), a counter sink hole (9) penetrates through the abutting plate (7), and a mounting bolt (10) in threaded connection with the threaded hole (8) penetrates through the counter sink hole (9).
4. The detachable support supporting structure that trades of deep basal pit of claim 3 characterized in that: i-steel (5) have backup pad (11) in the vertical rigid coupling between its two pterygoid laminas, backup pad (11) lower part with the web rigid coupling of I-steel (5), jack (6) rigid coupling is in on backup pad (11), backup pad (11) are kept away from the vertical rigid coupling in one side of jack (6) has a plurality of floor (12), floor (12) with the web rigid coupling of I-steel (5).
5. The detachable support supporting structure that trades of deep basal pit of claim 4 characterized in that: one side of the abutting plate (7) far away from the I-shaped steel (5) is provided with a dynamometer (13).
6. The detachable support supporting structure that trades of deep basal pit of claim 4 characterized in that: one side of the abutting plate (7) far away from the I-shaped steel (5) and one side of the I-shaped steel (5) close to the basement outer wall (1) are both provided with cushion pads (14).
7. The detachable support-replacing support structure for the deep foundation pit according to any one of claims 1 to 6, wherein: the support (4) is provided with at least two I-beams (5), and a plurality of fastening assemblies are arranged between every two adjacent I-beams (5).
8. The detachable support supporting structure that trades of deep basal pit of claim 7 characterized in that: fastening components includes fastener (15) of "nearly" style of calligraphy, the length of fastener (15) middle horizontal segment does the pterygoid lamina thickness twice of I-steel (5), all wear to be equipped with the perforation on fastener (15) both sides horizontal segment, wear to be equipped with a plurality of through-holes on the web of I-steel (5), fastener (15) are through running through the perforation with the bolt of through-hole is connected with the bolt of nut and is fixed adjacent two on I-steel (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760258.6U CN211006691U (en) | 2019-10-17 | 2019-10-17 | Removable supporting structure that trades of deep basal pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760258.6U CN211006691U (en) | 2019-10-17 | 2019-10-17 | Removable supporting structure that trades of deep basal pit |
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| Publication Number | Publication Date |
|---|---|
| CN211006691U true CN211006691U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921760258.6U Expired - Fee Related CN211006691U (en) | 2019-10-17 | 2019-10-17 | Removable supporting structure that trades of deep basal pit |
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| CN (1) | CN211006691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482065A (en) * | 2021-12-09 | 2022-05-13 | 中建八局第二建设有限公司 | Deep foundation pit construction device for newly-built building, close to subway and connected with subway |
-
2019
- 2019-10-17 CN CN201921760258.6U patent/CN211006691U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482065A (en) * | 2021-12-09 | 2022-05-13 | 中建八局第二建设有限公司 | Deep foundation pit construction device for newly-built building, close to subway and connected with subway |
| CN114482065B (en) * | 2021-12-09 | 2023-09-12 | 中建八局第二建设有限公司 | Deep foundation pit construction device for newly-built building adjacent to subway and connected with subway |
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Granted publication date: 20200714 |