CN105544554A - Assembly type foundation pit bracing structure and construction method thereof - Google Patents
Assembly type foundation pit bracing structure and construction method thereof Download PDFInfo
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- CN105544554A CN105544554A CN201510844986.5A CN201510844986A CN105544554A CN 105544554 A CN105544554 A CN 105544554A CN 201510844986 A CN201510844986 A CN 201510844986A CN 105544554 A CN105544554 A CN 105544554A
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- purlin
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
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Abstract
The invention relates to an assembly type foundation pit bracing structure in the foundation pit engineering field, and a construction method thereof. The assembly type foundation pit bracing structure comprises an earth-retaining and waterproof structure (1), piles in a row (2), a top plate (3) for the piles in a row, an overload box (4) and an overload earth body (5), wherein anti-dumping and anti-sliding carrying capacity of a bracing structure with piles in multiple rows is increased by utilizing gravity of the overload earth body (5). The invention further discloses an assembly type bracing purlin and a mounting and dismounting construction method thereof. The assembly type bracing purlin comprises an assembly sleeve (7), wherein the earth-retaining structure or one part of the earth-retaining structure is firmly connected to the bracing purlin by virtue of the assembly sleeve (7) and a filling material (15) filled in the assembly sleeve (7); after foundation pit backfilling, the connection between the assembly sleeve (7) and the earth-retaining structure is relieved by means of cutting, hot-melting and the like, so that the recycling purpose is achieved. The assembly type foundation pit bracing structure greatly reduces the foundation pit bracing cost and the construction period, can be recycled after foundation pit backfilling, and is good in environmental protection effect.
Description
Technical field
The present invention relates to the Foundation Pit Support Engineering field in geotechnical engineering field.
Background technology
Cement-soil gravity dam foundation pit enclosure structure is that a kind of one being suitable for not too deep foundation ditch comparatively conventional in current Foundation Pit Support Engineering field goes along with sb. to guard him pattern, and the advantage of gravity bracing of foundation pit pattern is without inner supporting structure, and cut the earth convenient, the construction period is shorter.But existing gravity foundation pit enclosure structure cost is higher, be suitable for the excavation of foundation pit degree of depth and be generally no more than 5 ~ 6m, after pit backfill, space enclosing structure is not recyclable, and in the soil body, form permanent solid residue, affect the exploitation of geotechnical engineering environment and the later stage underground space.Prior art, for darker foundation ditch, general fender post or the diaphragm wall of adopting, as space enclosing structure, adopts reinforced concrete fortifield village purlin.Above-mentioned space enclosing structure is expendable structure, is that very large resource and cost are wasted for the base pit engineering namely no longer needed after backfill.
Summary of the invention
First object of the present invention is to provide a kind of assembling foundation pit enclosure structure, this foundation pit enclosure structure speed of application is fast, cost is low, degree of safety is high, be suitable for foundation depth large, and can be used as dregs temporary storage, significantly reduce volume of earthwork and cost, the full space enclosing structure reclaimed can be adopted, reduce engineering cost further.
This kind of assembling foundation pit enclosure structure comprises soil-baffling structure, campshed, campshed top board, overload case and the overload soil body five part, during soil-baffling structure is wherein stop excavation of foundation pit, the outer water and soil in hole enters the structure of foundation ditch, campshed is the stake with certain rigidity and intensity of inserting the soil body, campshed top board is soil-baffling structure is connected the structure for common beaer with campshed, overload case is be positioned at campshed top board top can stack the structure storing the soil body, and the overload soil body is fill in the soil body in overload case.
In above-mentioned assembling foundation pit enclosure structure, above-mentioned soil-baffling structure is that above-mentioned campshed is steel pipe pile by the steel pipe pile diaphragm wall connected to form between steel pipe pile and steel pipe pile.
In above-mentioned assembling foundation pit enclosure structure, above-mentioned campshed top board is that the assembling of recyclable recycling encloses purlin.
Second object of the present invention is to provide a kind of assembling and encloses purlin, this assembling encloses the recycling that purlin can realize enclosing purlin structure, can be used for the above-mentioned assembling foundation pit enclosure structure of the present invention as campshed top board, also can be used for the foundation pit enclosure structure that fender post (wall) adds inner support or anchor pole, speed of application is fast, cost is low, low-carbon environment-friendly.
This assembling encloses purlin and comprises side plate, panel, mounting bush and fill concrete four part, side plate is wherein the steel plate being positioned at mounting bush both sides, panel is be positioned to enclose purlin up and down and the steel plate punched at mounting bush place, mounting bush is the tubular cavity of vertical runs between biside plate, the concrete structure in space of fill concrete for being filled in panel, side plate and mounting bush and surrounding.
Enclose in purlin at above-mentioned assembling, can the shear key passing through side plate and fill concrete be installed on above-mentioned side plate.
Enclose in purlin at above-mentioned assembling, bolt connecting hole can be set on above-mentioned side plate.
Enclose in purlin at above-mentioned assembling, connection stiffener can be set on above-mentioned side plate.
Enclose in purlin at above-mentioned assembling, sectional joint arranges and connects crab-bolt and shear key, and in the cast-in-situ concrete of sectionalizing joint place.
Enclose in purlin at above-mentioned assembling, above-mentioned mounting bush is steel pipe.
3rd object of the present invention is to provide the construction method that a kind of bracing of foundation pit assembling used encloses purlin, and this construction method can realize installation that assembling encloses purlin smoothly with removing to reclaim and construct, and soon, cost is low for speed of application.
The construction method that this assembling encloses purlin comprises the following steps:
A) manufacture assembling enclose purlin and be transported to installation site;
B) mounting bush assembling being enclosed purlin is enclosed within a part for Retaining Structures in Excavation Engineering or soil-baffling structure;
C) with casting resin, the part of mounting bush with soil-baffling structure or soil-baffling structure is firmly connected;
D) operating period that assembling encloses purlin is entered;
E) enclose after purlin uses and terminate at assembling, remove casting resin and firm between mounting bush with soil-baffling structure is connected;
F) reclaim assembling and enclose purlin.
Enclose in purlin construction method at above-mentioned assembling, the step c above-mentioned) in casting resin can be one or more combination in concrete, mortar, cement paste.
Enclose in purlin construction method at above-mentioned assembling, the step c above-mentioned) in casting resin can be heat-fusible materials.
Enclose in purlin construction method at above-mentioned assembling, the step e above-mentioned) in, can adopt the method for convolution cutting that casting resin is connected releasing to firm between mounting bush with soil-baffling structure.
Enclose in purlin construction method at above-mentioned assembling, the step e above-mentioned) in, can adopt the method for heating that casting resin is softened, then just casting resin is connected releasing to firm between mounting bush with soil-baffling structure.
Enclose in purlin construction method at above-mentioned assembling, step e above-mentioned) in, in casting resin internal drilling or can utilize in step c) time the preformed hole buried underground, then place expansion agent in hole, casting resin distending be connected firm between mounting bush with soil-baffling structure to remove casting resin.
Assembling foundation pit enclosure structure of the present invention and construction method thereof, be applicable to all kinds of soil layer such as weak soil, pan soil, and be applicable to the foundation ditch of the multiple degree of depth, the enclosing purlin, keep off native water-stopping structure of pattern foundation pit supporting structure, the full recovery of campshed can be realized, significantly reduce shoveling difficulty, improve speed of application, and part dregs required when can store pit backfill when foundation ditch is cut the earth, reduce engineering cost, can also combine with inner support system and use.
Accompanying drawing explanation
Fig. 1 is first embodiment of the present invention a kind of assembling foundation pit enclosure structure generalized section used.
Fig. 2 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin schematic cross section;
Fig. 3 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin Concrete Filled position schematic cross-sectional view;
Fig. 4 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin mounting bush position schematic cross-sectional view;
Fig. 5 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin sectionalizing joint position schematic cross-sectional view;
Fig. 6 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin single hop schematic cross section;
Fig. 7 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin single hop panel-shaped and organigram;
Fig. 8 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses the nearly excavation face of purlin single hop the first side plate shape and organigram;
Fig. 9 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin single hop nearly excavation face the second side plate shape and organigram;
Figure 10 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin single hop and meets native face side plate shape and organigram;
Figure 11 is that second embodiment of the present invention a kind of assembling foundation pit enclosure structure used assembling used encloses purlin using state structure organigram;
Figure 12 is that the used assembling that multiline pile goes along with sb. to guard him that is applicable to of second embodiment of the present invention a kind of assembling foundation pit enclosure structure used encloses purlin organigram;
Figure 13 is that the assembling of second embodiment of the present invention a kind of assembling foundation pit enclosure structure used separable dismounting used encloses purlin structure organigram.
Detailed description of the invention
As first embodiment as shown in Figure 1 of the present invention, main purpose is to introduce the structure of a kind of hypergravity dam of the present invention foundation pit enclosure structure, operating principle and construction method.This hypergravity dam foundation pit enclosure structure comprises the native water-stopping structure of gear (1), campshed (2), campshed top board (3), overload case (4) and the overload soil body (5) five part.As shown in Figure 1, during gear soil water-stopping structure (1) is wherein stop excavation of foundation pit, the outer water and soil in hole enters the structure of foundation ditch, campshed (2) is the stake with certain rigidity and intensity of inserting the soil body, campshed top board (3) is to be connected the structure for common beaer with campshed (2) and can to carry campshed top board top to overload keeping off native water-stopping structure (1) structure of the soil body (5) weight, overload case (4) can stack for being positioned at campshed top board (3) top the structure storing the soil body, the overload soil body (5) is for filling in the soil body in overload case (4).When implementing, can by campshed top board (3) and campshed (2), keep off native water-stopping structure (1) and be firmly connected for fixed end bearing, to improve campshed (2) and to keep off the level of native water-stopping structure (1) to supporting capacity.The top of campshed (2) can be set to as shown in Figure 1 exceed campshed top board (3) certain altitude, also can be concordant with campshed top board (3) top so that vehicle to run.Campshed (2) can be concrete stake or steel pipe pile, as adopt steel pipe pile, then can build at pit backfill or sole plate and with gear native water-stopping structure (1) complete support replacement after extract.The method for pulling out of campshed (2) can be such, first adopts similar concrete core drilling rig the connection of the concrete of campshed (2) periphery to be excised, is then extracted by grouting steel tube pile (2).The soil plug that the method for pulling out of grouting steel tube pile (2) can adopt the present inventor to propose compensates steel pipe pile pile extracting method or hole pressure counter-force steel pipe pile pile extracting method enforcement, substantially to eliminate the harmful effect that pile pulling band soil produces.Keeping off native water-stopping structure can be bored pile, also can be that steel pipe pile adds water seal curtain, can also be the steel pipe pile diaphragm wall connected to form between steel pipe pile and steel pipe pile.As adopted steel pipe pile or steel pipe pile diaphragm wall as the native water-stopping structure of gear (1), then the method similar with campshed (2) can be adopted its recycling.Campshed top board (3) can adopt reinforced concrete structure, campshed top board (3) should with campshed (2), keep off native water-stopping structure (1) and be firmly connected, the load on its top can be born.Overload case (4) can be the channel-shaped structure of upper opening, it can be campshed top board (3) bottom it, its sidewall can be campshed (2) and the upwards extension keeping off native water-stopping structure (1), also can be the platy structure of other patterns, can the splendid attire soil body.The dregs need transported outward when the overload soil body (5) can be excavation of foundation pit, the soil body needed when also can be and be used as foundation ditch or place backfill.Can certainly be other ponderable materials.When adopt foundation ditch dig out the soil body double as foundation ditch and place backfill the soil body as overload the soil body (5) time, better economy can be reached.In an embodiment, if do not add the overload soil body (5) and overload case (4), be then multiline pile foundation pit enclosure structure.The overload case (4) of hypergravity dam of the present invention foundation pit enclosure structure and the interior overload soil body (5) thereof can be used for depositing the soil body on the one hand temporarily, and the weight of the overload soil body (5) can be utilized on the other hand to improve overturning or slip resistance analysis and the resistant slide ability of gravity dam body.
As second embodiment as shown in Fig. 2 ~ Figure 13 of the present invention, main purpose is that introducing a kind of bracing of foundation pit of the present invention assembling used encloses structure structure, the operating principle of purlin and install and reclaim construction method.First composition graphs 2 ~ Figure 13 introduces the structure structure that this assembling encloses purlin.This assembling encloses purlin and comprises side plate (6), panel (9), mounting bush (7) and fill coagulation (8) native four parts, side plate (6) is wherein for being positioned at the steel plate of mounting bush (7) both sides, desirable 3 ~ the 30mm of design thickness, panel (9) encloses purlin up and down and the steel plate punched at mounting bush (7) place for being positioned at, and the steel plate that desirable 5 ~ 30mm is thick makes.One piece of panel (9) also can be only set, as laid the reinforcing bar of q.s in fill concrete (8), then side plate (6) and panel (9) can be thinning, when intensity is enough, side plate (6) and panel (9) can be then upper and lower surface and the side of coagulation fortifield village purlin structure, steel plate can not be laid, now assembling encloses purlin and is reinforced concrete fortifield village purlin, the upper and lower surface of enclosing purlin is panel (9), and the two sides of enclosing purlin are equivalent to side plate (6).Mounting bush (7), for being positioned at the tubular cavity of vertical runs between biside plate (6), can adopt steel pipe manufacturing, can be the tubular of cylindrical shape, square tube shape or other cross sectional shapes.Also can directly by the tubular formed after concrete setting.Under normal circumstances, in order to improve the bearing capacity that encloses purlin and control to enclose purlin weight so that install, dismounting and transport, steel making side plate (6) of suitable depth, panel (9) and mounting bush (7) should be selected.Fill concrete (8) for being filled in panel (9), the concrete structure in space that side plate (6) and mounting bush (7) surround, can in fill concrete (8) configuration reinforcement to meet requirement for bearing capacity.Enclose in purlin at the assembling of the present embodiment, can pass through the shear key (12) of side plate (6) and fill concrete (8) in the upper installation of above-mentioned side plate (6), shear key (12) can be dowel or bolt.Under normal conditions, in bracing of foundation pit to enclose purlin longer, for the ease of installing, dismounting, transport, generally need that assembling is enclosed purlin and be divided into multistage, section length can be 12 ~ 25m, depends primarily on transport and mounting condition.When mounted assembling prefabricated for multistage is enclosed purlin and carry out assembled connection.When making assembling and enclosing purlin, at the two ends of every section of side plate (6), link bolt hole is set, link bolt hole can be parallel to encloses the setting of purlin length direction, also can arrange on side plate (6) and connect stiffener (11) and end plate (10), bolt hole laid by end plate (10).When assembled, connecting bolt (14) is utilized to be connected by the adjacent purlin that encloses, as shown in Figure 2.Bolt hole and stiffener (11) can be established multiple, enclose the bending resistance requirement of purlin in joint, as shown in Figure 5 to meet.Enclose in purlin at the assembling that the present embodiment is used, can connecting bolt (14) be set at sectionalizing joint place, and shear key (12) is set, in the outside of shear key (12), cover plate (13) is installed, as shown in Figure 2.After connecting elements installation, in the cast-in-situ concrete of sectionalizing joint place, connecting elements can be connected for common beaer.Enclose purlin in irregular shape, reinforced concrete cast-in-situ can be set at irregular section and enclose purlin replacement.For enclosing the Foundation Pit Support Engineering needing to arrange inner support inside purlin, bolt connecting hole (16) can be set on the side plate (6) of contiguous excavation face, when support is installed, by threaded for end bar connecting on bolt connecting hole (16).Adjacent sectional section diverse location by enclosing purlin at assembling arranges bolt connecting hole (16), lays requirement, as shown in Fig. 8 and Fig. 9 to meet support interval.Shear key (12) adopts the bolt passing through side plate (6), and the distribution of its installation position can be arranged by Fig. 8 ~ Figure 10.Also can reserve bolt connecting hole (16) or connecting bolt (14) at the nut place at shear key (12) place so that with the connection of other components.As, adopt longer nut as the nut of shear key (12), during installation, make nut be longer than bolt end, also can be reserved a part of so that connect outward at nut by the thread segment of shear key (12).In the present embodiment, can arrange and arrange mounting bush (7) more, as shown in figure 12, what can be used as that multiline pile goes along with sb. to guard him encloses purlin or campshed top board (3).Separable assembling as shown in fig. 13 that can also be adopted to enclose purlin, and such assembling encloses purlin and is divided into two parts, when mounted, is connected by two parts, uses after terminating, and is separated by two parts and removes.The present embodiment with lower part, mainly introduce assembling of the present invention enclose purlin installation, dismounting construction method.The construction method that this assembling encloses purlin comprises following 6 steps.In the first step, manufacture assembling and enclose purlin and be transported to installation site, the foregoing teachings that can refer to the present embodiment completes the manufacture that assembling encloses purlin.Complete the first step, enter second step.In this step, the mounting bush (7) assembling being enclosed purlin is enclosed within a part for Retaining Structures in Excavation Engineering or soil-baffling structure, soil-baffling structure described in this step, can be the space enclosing structures such as steel pipe pile diaphragm wall, steel pipe pile, steel sheet pile, the stake of SMW engineering method, castinplace pile, diaphragm wall, if reinforced concrete fender, be positioned over after then the reinforcing bar in steel concrete can being exhumed in mounting bush (7), to ensure to be connected firmly, also can be positioned over after the side surface process of reinforced concrete member in mounting bush (7).Thus complete second step, enter the 3rd step.In this step, with the space between casting resin (15) filling mounting bush (7) and a part for soil-baffling structure or soil-baffling structure, formed and firmly connect.Casting resin (15) in this step can be the one or more combination in concrete, mortar, cement paste, and casting resin (15) also can be the heat-fusible materials that epoxy resin etc. has sufficient intensity and rigidity.Thus complete the 3rd step, enter the 4th step.This step is the operating period that assembling encloses purlin, can carry out excavation of foundation pit after the intensity of material to be filled (15) reaches design load.Complete the 4th step, enter the 5th step.Enclose after purlin uses and terminate at assembling, remove casting resin (15) and mounting bush (7) is connected with firm between soil-baffling structure or its part.Multiple method can be adopted to remove the connection of casting resin (15), as convolution rig can be adopted, casting resin (15) is cut; What adopt as casting resin (15) is heat-fusible materials, then can adopt the method for heating that casting resin (15) is softened, casting resin (15) is removed with firm connection the between soil-baffling structure or its part mounting bush (7).If what assembling enclosed that purlin adopts is separate type as shown in fig. 13 that, the preformed hole can buried underground in casting resin (15) internal drilling or when utilizing in step 3, in hole, place expansion agent, at point gap (17) place, casting resin (15) distending is removed firm connection the between mounting bush (7) with soil-baffling structure (1) to remove casting resin (15).Complete the 5th step, enter the 6th step.Assembling is mainly enclosed purlin and reclaims by this step, and assembling is enclosed purlin and is separated with soil-baffling structure (1) or its part by the equipment such as available loop wheel machine, jack, completes recycling.Thus complete assembling of the present invention enclose purlin install with reclaim construction method.
This patent includes but not limited to other construction methods of the alternative use of professional person in this area.
Claims (7)
1. a hypergravity dam foundation pit enclosure structure, comprise the native water-stopping structure of gear (1), campshed (2), campshed top board (3), overload case (4) and the overload soil body (5) five part, during gear soil water-stopping structure (1) is wherein stop excavation of foundation pit, the outer water and soil in hole enters the structure of foundation ditch, campshed (2) is the stake with certain rigidity and intensity of inserting the soil body, campshed top board (3) is will keep off native water-stopping structure (1) to be connected structure for common beaer with campshed (2), overload case (4) can stack for being positioned at campshed top board (3) top the structure storing the soil body, the overload soil body (5) is for filling in the soil body in overload case (4).
2. an assembling encloses purlin, it is characterized in that comprising side plate (6), panel (9), mounting bush (7) and fill concrete (8) four part, side plate (6) is wherein for being positioned at the steel plate of mounting bush (7) both sides, panel (9) encloses purlin up and down and the steel plate punched at mounting bush (7) place for being positioned at, mounting bush (7) is for being positioned at the tubular cavity of vertical runs between biside plate (6), fill concrete (8) is for being filled in panel (9), the concrete structure in the space that side plate (6) and mounting bush (7) surround, and the shear key (12) of side plate (6) and fill concrete (8) is passed through in the upper installation of side plate (6).
3. assembling as claimed in claim 2 encloses a purlin construction method, comprises the following steps:
A) manufacture assembling enclose purlin and be transported to installation site;
B) mounting bush (7) assembling being enclosed purlin is enclosed within a part for Retaining Structures in Excavation Engineering or soil-baffling structure;
C) with casting resin (15), the part of mounting bush with soil-baffling structure or soil-baffling structure is firmly connected;
D) operating period that assembling encloses purlin is entered;
E) enclose after purlin uses and terminate at assembling, remove casting resin (15) and mounting bush (7) is connected with firm between soil-baffling structure;
F) reclaim assembling and enclose purlin.
4. assembling according to claim 3 encloses purlin construction method, it is characterized in that at above-mentioned step c) in casting resin (15) be heat-fusible materials.
5. assembling according to claim 3 encloses purlin construction method, it is characterized in that at above-mentioned step e) in, adopt the method for convolution cutting that casting resin is connected releasing to firm between mounting bush with soil-baffling structure.
6. assembling according to claim 3 encloses purlin construction method, it is characterized in that at above-mentioned step e) in, adopt the method for heating that casting resin (15) is softened, then just casting resin (15) is removed with firm connection the between soil-baffling structure mounting bush (7).
7. assembling according to claim 3 encloses purlin construction method, it is characterized in that in casting resin (15) internal drilling or utilize in step c) time the preformed hole buried underground, in hole, place expansion agent again, casting resin (15) distending is connected with firm between soil-baffling structure mounting bush (7) to remove casting resin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510844986.5A CN105544554A (en) | 2015-10-26 | 2015-11-20 | Assembly type foundation pit bracing structure and construction method thereof |
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| CN201520833122 | 2015-10-26 | ||
| CN2015208331229 | 2015-10-26 | ||
| CN201510844986.5A CN105544554A (en) | 2015-10-26 | 2015-11-20 | Assembly type foundation pit bracing structure and construction method thereof |
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| CN105544554A true CN105544554A (en) | 2016-05-04 |
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| CN201510844986.5A Pending CN105544554A (en) | 2015-10-26 | 2015-11-20 | Assembly type foundation pit bracing structure and construction method thereof |
| CN201811143905.9A Pending CN109487795A (en) | 2015-10-26 | 2016-04-05 | A kind of assembled purlin and its construction method |
| CN201811143967.XA Pending CN109505298A (en) | 2015-10-26 | 2016-04-05 | A kind of self-balancing foundation pit enclosure method |
| CN201610223691.0A Pending CN106609509A (en) | 2015-10-26 | 2016-04-05 | Self-balancing foundation pit enclosure structure and construction method thereof |
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| CN201811143905.9A Pending CN109487795A (en) | 2015-10-26 | 2016-04-05 | A kind of assembled purlin and its construction method |
| CN201811143967.XA Pending CN109505298A (en) | 2015-10-26 | 2016-04-05 | A kind of self-balancing foundation pit enclosure method |
| CN201610223691.0A Pending CN106609509A (en) | 2015-10-26 | 2016-04-05 | Self-balancing foundation pit enclosure structure and construction method thereof |
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| CN106609509A (en) * | 2015-10-26 | 2017-05-03 | 张继红 | Self-balancing foundation pit enclosure structure and construction method thereof |
| CN108755705A (en) * | 2018-07-12 | 2018-11-06 | 中国建筑第八工程局有限公司 | Exempt from branch die combination purlin and its construction method |
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| CN112196335B (en) * | 2020-09-29 | 2021-08-13 | 南京理工大学紫金学院 | Annular underground garage and construction method thereof |
| CN114606930B (en) * | 2022-03-29 | 2024-04-26 | 中天建设集团有限公司 | Assembled recyclable underground diaphragm wall and construction method thereof |
| CN115506363A (en) * | 2022-09-09 | 2022-12-23 | 中国铁建港航局集团有限公司 | Near-water deep foundation pit support and construction method |
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| CN109487795A (en) * | 2015-10-26 | 2019-03-19 | 张继红 | A kind of assembled purlin and its construction method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109505298A (en) | 2019-03-22 |
| CN106609509A (en) | 2017-05-03 |
| CN109487795A (en) | 2019-03-19 |
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Application publication date: 20160504 |