CN112095632A - Pile-arch combined retaining structure and construction method thereof - Google Patents
Pile-arch combined retaining structure and construction method thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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- E02D17/00—Excavations; Bordering of excavations; Making embankments
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Abstract
The invention relates to the technical field of slope and landslide support, in particular to a pile-arch combined retaining structure and a construction method thereof. The invention has the beneficial effects that: the advantage of make full use of domes converts horizontal soil pressure into domes's radial pressure, and final domes pressure transmits for the friction pile, sets up the off-load platform between domes, increases the bulk rigidity and the anti-overturning moment of barricade, but friction pile interval greatly increased, and the very big friction pile quantity that reduces has improved the reliability of supporting construction system.
Description
Technical Field
The invention relates to the technical field of side slope and landslide support, in particular to a pile-arch combined retaining structure and a construction method thereof.
Background
The conventional pile-plate retaining wall generally comprises a plurality of anti-slide piles, an inter-pile baffle is arranged between two adjacent anti-slide piles, and a side slope soil layer is blocked by the inter-pile baffle. The traditional retaining wall between piles needs the baffle between piles to support the side slope, so that the requirement on the strength of the baffle between piles is high, and the length of the baffle between piles is small. And the traditional pile plate retaining wall inter-pile baffle only prevents the collapse of soil between piles, does not fully play the role of the inter-pile baffle, has smaller distance between the anti-slide piles, usually 3-5 meters, and ensures that the traditional pile plate retaining wall has long construction period and high construction cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pile-arch combined retaining structure and a construction method thereof, which fully utilize the advantages of an arch structure, convert horizontal soil pressure into radial pressure of an arch, fully utilize the compressive strength of concrete, finally transfer the load of an arch support to a generalized anti-slide pile, reduce the load of a baffle between piles, greatly increase the distance between piles and improve the reliability of a retaining structure system.
The technical scheme for solving the technical problems is as follows: the utility model provides a stake encircles joint retaining structure, includes a plurality of friction piles that just vertical setting side by side, the lower extreme of friction pile inlays fixedly in side slope base stabilization basement rock, adjacent two all be equipped with between the friction pile and be arched arch-shaped structure, arch-shaped structure's extrados is towards the side slope, two arch-shaped structure's two encircle enough respectively with adjacent two friction pile fixed connection, adjacent two all fixedly be equipped with between the arch-shaped structure's extrados and encircle off-load platform.
The invention has the beneficial effects that: the anti-slide piles are connected with the anti-slide piles through the arch structures, the advantages of the arch structures are fully utilized, horizontal soil pressure is converted into radial pressure of the arch structures, the compressive strength of the arch structures is fully utilized, finally, the load of the arch structures is transmitted to the anti-slide piles, the distance between the anti-slide piles can be greatly increased, the number of the anti-slide piles is greatly reduced, the supporting cost and the construction difficulty of the filling side slope are reduced, and the reliability of a supporting structure system is improved; the anti-overturning moment is provided for the filling side slope through the unloading platform, the section and the reinforcing bars of the anti-slide pile are greatly reduced, the anti-slide pile and the arch structure are connected into a whole through the unloading platform plate, and the integral stability and the rigidity of the structure are improved.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the axes and the outer diameters of the upper part and the lower part of the arch structure are the same.
The beneficial effect of adopting the further scheme is that: the upper and lower overall external diameters of the arch structure are the same, which is convenient for manufacturing the arch structure.
Further, the outer diameter of the lower portion of the arch is smaller than the outer diameter of the upper portion thereof.
The beneficial effect of adopting the further scheme is that: the arch structure adopts the structure that the upper portion external diameter is big, the lower part external diameter is little, and the arch structure that sets up through the slope conducts the pressure of the side slope soil that receives to side slope bottom of a slope stable basement rock, reduces the pressure that the arch structure received, improves the reliability of retaining structure.
Further, the slide-resistant pile comprises a slide-resistant pile body, and the arch foot of the arch structure is fixedly connected with the slide-resistant pile body.
The beneficial effect of adopting the further scheme is that: the anti-slide pile adopts a structure of a single anti-slide pile body, and has the advantages of simple structure, low cost and convenient manufacture.
Further, the slide-resistant pile includes back campshed and preceding campshed, arch foot of domes with back campshed is towards the one side fixed connection of side slope, preceding campshed is established back campshed is kept away from one side of side slope, preceding campshed with back campshed interval sets up, the top of back campshed with the fixed supporting beam that is equipped with between the top of preceding campshed.
The beneficial effect of adopting the further scheme is that: the anti-slide pile adopts a structure that the top of the anti-slide pile is connected with the front row of piles through the supporting beam, so that the stability of the anti-slide pile support is improved, the stability of the whole blocking structure is ensured, and larger downward sliding force can be borne.
Further, the slide-resistant pile comprises rear row straight piles, front row straight piles and front row inclined piles, arch feet of the arch structures are fixedly connected with one surfaces, facing a side slope, of the rear row straight piles, the front row straight piles and the front row inclined piles are arranged on one sides, far away from the side slope, of the rear row straight piles, the top heights of the front row straight piles are lower than the heights of the rear row straight piles, the top ends of the front row straight piles are fixedly connected with the lower ends of the front row inclined piles in an integrated mode, the top ends of the front row inclined piles are obliquely arranged towards the top ends of the rear row straight piles, and the top ends of the front row inclined piles are fixedly connected with the top ends of the rear row straight piles.
The beneficial effect of adopting the further scheme is that: the anti-slide pile adopts the straight stake of back row and the straight stake of front row through the connection of the oblique stake of front row, supports the straight stake of back row through the straight stake of front row, improves the intensity that the anti-slide pile supported to improve whole barrier structure's stability.
Further, the slide-resistant pile includes row stake behind the truss and row stake before the truss, arch foot of domes with row stake orientation behind the truss one side fixed connection of side slope, the row stake is established behind the truss the row stake is kept away from one side of side slope, behind the truss the row stake with be equipped with between the row stake before the truss and be used for connecting behind the truss row stake with the support truss of row stake before the truss.
The beneficial effect of adopting the further scheme is that: the anti-slide pile adopts the truss back row pile and the truss front row pile which are connected through the support truss, so that the support strength of the whole anti-slide pile is improved, and the reliability of the whole blocking structure is ensured.
Further, the inter-arch unloading platform is of a reinforced concrete structure, and the inter-arch unloading platform and the upper surface of the slope bottom stable bedrock of the side slope are arranged at intervals.
The beneficial effect of adopting the further scheme is that: the inter-arch unloading platform is of a reinforced concrete structure, is convenient to manufacture and high in strength, and can ensure the stability and rigidity of the inter-arch unloading platform.
A construction method of the pile-arch combined retaining structure comprises the following steps:
step one, constructing an anti-slide pile: determining the position of the slide-resistant pile, and constructing the slide-resistant pile at the designated position in a static pressure or drilling hole insertion or drilling hole concrete pouring mode; the construction process of underground continuous walls or the forming of high-pressure jet grouting piles is adopted for landslide arch structures, and the construction process of cast-in-place reinforced concrete is adopted for filling side slopes.
Step two, setting an arch structure: arranging an arch structure between two adjacent anti-slide piles, and fixedly connecting arch feet of the arch structure with the two adjacent anti-slide piles respectively;
step three, arranging an inter-arch platform: pouring an inter-arch unloading platform between two adjacent arch structures, so that the inter-arch unloading platform is fixedly connected with the outer arc surfaces of the two adjacent arch structures, and the overturning moment is increased;
step four, repeating the step one to the step three until all the anti-slide piles, the arch structures and the inter-arch platforms are installed;
and fifthly, filling soil behind the wall, filling soil between the side slope and the arch structure, and finishing construction.
Further, in the second step, the method for arranging the arch structure between two adjacent slide-resistant piles comprises the following steps: an arch structure is arranged between two adjacent slide-resistant piles in a pouring mode; or hoisting the poured arch structure between two adjacent anti-slide piles, and then fixing the arch feet of the arch structure on the two anti-slide piles respectively through rigid connecting pieces.
The beneficial effect who adopts above-mentioned scheme is: soil pressure (landslide thrust) is converted into arch radial pressure through the arch structure, the advantage that the compressive strength of a concrete material is high is fully utilized, one part of component of the axial force of the arch structure at a support position (the joint of the arch structure and the anti-slide pile) is balanced, the other part of component is left and right matched with the anti-slide pile, the overall stability and the rigidity of the structure are improved, and the reliability of the retaining structure is improved.
Drawings
FIG. 1 is a top view of a pile-arch ganged retaining structure of the present invention;
FIG. 2 is a cross-sectional view of a first embodiment of the invention taken along plane A-A of FIG. 1;
FIG. 3 is a cross-sectional view of a second embodiment of the invention taken along plane A-A of FIG. 1;
FIG. 4 is a cross-sectional view of a third embodiment of the invention taken along plane A-A of FIG. 1;
FIG. 5 is a cross-sectional view of a fourth embodiment of the invention taken along plane A-A of FIG. 1;
FIG. 6 is a cross-sectional view of a fifth embodiment of the invention taken along plane A-A of FIG. 1;
in the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises anti-slide piles, 2, arch structures, 3, an inter-arch unloading platform, 4, anti-slide pile bodies, 5, rear piles, 6, front piles, 7, supporting beams, 8, rear straight piles, 9, front straight piles, 10, front inclined piles, 11, truss rear piles, 12, truss front piles, 13 and supporting trusses.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example one
As shown in fig. 1, the present embodiment includes a plurality of anti-slide piles 1 arranged side by side and vertically, in the present embodiment, the anti-slide piles 1 may adopt steel piles, concrete piles, reinforced concrete piles, profile steel concrete piles, the anti-slide piles 1 may be rectangular piles, circular piles, etc., the lower ends of the anti-slide piles 1 are embedded and fixed in the slope bottom stable bedrock of a slope, an arched structure 2 is disposed between two adjacent anti-slide piles 1, the outer arc surface of the arched structure 2 faces the slope, two arched feet of the arched structure 2 (the arched feet refer to two vertical end surfaces of the arched structure 2 in the present embodiment) are respectively and fixedly connected with two adjacent anti-slide piles 1, a specific connection manner may be that the two arched feet are fixed by pouring concrete steel bars or by fixing members, such as rivets, etc., an inter-arch unloading platform 3 is fixedly disposed between the outer arc surfaces of two adjacent arched structures 2, the inter-arch unloading platform 3 is horizontally arranged, and preferably, the axis of the arch structure 2 is on the central line of the connecting line of the two anti-slide piles 1. The anti-slide piles 1 are connected with the anti-slide piles 1 through the arch structures 2, the advantages of the arch structures are fully utilized, horizontal soil pressure is converted into radial pressure of the arch structures 2, the compressive strength of the arch structures 2 is fully utilized, finally, loads of the arch structures 2 are transmitted to the anti-slide piles 1, the distance between the anti-slide piles 1 can be greatly increased, the number of the anti-slide piles 1 is greatly reduced, the cost and the construction difficulty of supporting of filling side slopes are reduced, and the reliability of a supporting structure system is improved; the unloading platform provides an anti-overturning moment, so that the cross section and the reinforcing bars of the slide-resistant pile 1 are greatly reduced, the slide-resistant pile 1 and the arch structure 2 are connected into a whole through the unloading platform plate, and the integral stability and rigidity of the structure are improved.
The embodiment also discloses a construction method of the pile-arch combined retaining structure, which comprises the following steps:
step one, constructing an anti-slide pile 1: determining the position of the slide-resistant pile 1, and constructing the slide-resistant pile 1 at the designated position in a static pressure or drilling hole insertion or drilling hole concrete pouring mode;
step two, arranging an arch structure 2: arranging an arch structure 2 between two adjacent slide-resistant piles 1, and fixedly connecting the arch feet of the arch structure 2 with the two adjacent slide-resistant piles 1 respectively;
step three, arranging an inter-arch platform: pouring an inter-arch unloading platform 3 between two adjacent arch structures 2, so that the inter-arch unloading platform 3 is fixedly connected with the outer arc surfaces of the two adjacent arch structures 2;
step four, repeating the step one to the step three until all the anti-slide piles 1, the arch structures 2 and the inter-arch platforms are installed;
and fifthly, filling soil behind the wall, filling soil between the side slope and the arch structure 2, and finishing construction.
Further, in the second step, the method for arranging the arch structure 2 between two adjacent slide-resistant piles 1 comprises the following steps: arranging an arch structure 2 between two adjacent slide-resistant piles 1 in a pouring mode; or hoisting the poured arch structure 2 between two adjacent anti-slide piles 1, and then fixing the arch feet of the arch structure 2 on the two anti-slide piles 1 through rigid connecting pieces respectively.
Soil pressure (landslide thrust) is converted into arch radial pressure through the arch structure, the advantage that the compressive strength of concrete materials is high is fully utilized, one part of components of the axial force of the arch structure 2 at a support position (the joint of the arch structure 2 and the anti-slide pile 1) is balanced, the other part of components is left and right and is matched with the anti-slide pile 1, the overall stability and the rigidity of the structure are improved, and the reliability of the retaining structure is improved.
Example two
As shown in fig. 2, the present embodiment further includes the following technical solutions on the basis of the first embodiment: the axes and the outer diameters of the upper part and the lower part of the arch structure 2 are the same, and the upper whole outer diameter and the lower whole outer diameter of the arch structure 2 are the same, so that the arch structure 2 is convenient to manufacture.
Specifically, the slide-resistant pile 1 comprises a slide-resistant pile body 4, and the arch foot of the arch structure 2 is fixedly connected with the slide-resistant pile body 4. The slide-resistant pile 1 adopts the structure of a single slide-resistant pile body 4, and has the advantages of simple structure, low cost and convenient manufacture.
EXAMPLE III
As shown in fig. 3, this embodiment further includes the following technical solutions on the basis of the first embodiment: the axes and the outer diameters of the upper part and the lower part of the arch structure 2 are the same, and the upper whole outer diameter and the lower whole outer diameter of the arch structure 2 are the same, so that the arch structure 2 is convenient to manufacture. Slide-resistant pile 1 includes back row pile 5 and front row pile 6, arch foot of domes 2 with back row pile 5 is towards the one side fixed connection of side slope, front row pile 6 is established back row pile 5 is kept away from one side of side slope, front row pile 6 with back row pile 5 interval sets up, the top of back row pile 5 with fixed supporting beam 7 that is equipped with between the top of front row pile 6. The anti-slide pile 1 adopts a structure that the top of the anti-slide pile 1 is connected with the rear row pile 5 and the front row pile 6 through the supporting cross beam 7, so that the supporting stability of the anti-slide pile 1 is improved, and the stability of the whole blocking structure is ensured.
Example four
As shown in fig. 4, this embodiment further includes the following technical solutions on the basis of the first embodiment: the axes and the outer diameters of the upper part and the lower part of the arch structure 2 are the same, and the upper whole outer diameter and the lower whole outer diameter of the arch structure 2 are the same, so that the arch structure 2 is convenient to manufacture. The slide-resistant pile 1 comprises rear row straight piles 8, front row straight piles 9 and front row inclined piles 10, arch feet of the arch structure 2 are fixedly connected with the rear row straight piles 8 towards one side of a side slope, the front row straight piles 9 and the front row inclined piles 10 are arranged on one side, far away from the side slope, of the rear row straight piles 8, the top height of the front row straight piles 9 is lower than the height of the rear row straight piles 8, the top ends of the front row straight piles 9 are fixedly connected with the lower ends of the front row inclined piles 10 in an integrated mode, the top ends of the front row inclined piles 10 are obliquely arranged towards the top ends of the rear row straight piles 8, and the top ends of the front row inclined piles 10 are fixedly connected with the top ends of the rear row straight piles 8. The anti-slide pile 1 adopts the rear row of straight piles 8 and the front row of straight piles 9 which are connected through the front row of inclined piles 10, the rear row of straight piles 8 are supported through the front row of straight piles 9, the supporting strength of the anti-slide pile 1 is improved, and therefore the stability of the whole blocking structure is improved.
EXAMPLE five
As shown in fig. 5, this embodiment further includes the following technical solutions on the basis of the first embodiment: the axes and the outer diameters of the upper part and the lower part of the arch structure 2 are the same, and the upper whole outer diameter and the lower whole outer diameter of the arch structure 2 are the same, so that the arch structure 2 is convenient to manufacture. Stake 1 includes row's stake 11 behind the truss and row's stake 12 before the truss, arch structure 2 the hunch foot with row's stake 11 orientation behind the truss one side fixed connection of side slope, row's stake 12 is established behind the truss row stake 11 is kept away from behind the truss one side of side slope, row's stake 11 behind the truss with be equipped with between row's stake 12 behind the truss and be used for connecting row's stake 11 behind the truss with the support truss 13 of row's stake 12 before the truss. The anti-slide pile 1 adopts the truss back row pile 11 and the truss front row pile 12 which are connected through the supporting truss 13, so that the supporting strength of the whole anti-slide pile 1 is improved, and the reliability of the whole blocking structure is ensured. In this embodiment, the bracing truss 13 includes the crossbeam of level setting and the down tube that the slope set up, and is a plurality of the crossbeam interval sets up, and both ends respectively with truss back row pile 11 and truss front row pile 12 fixed connection, the down tube sets up between two adjacent crossbeams for fixed connection truss back row pile 11 and truss front row pile 12 and/or two adjacent crossbeams.
EXAMPLE six
As shown in fig. 6, the present embodiment is different from the second to fifth embodiments in that: the external diameter of the lower part of arch structure 2 is less than the external diameter on its upper portion, and is concrete, arch structure 2's external diameter is by supreme increase in proper order down, and arch structure 2 adopts the big, little structure of lower part external diameter of upper portion external diameter, and the slope soil's that will receive pressure conduction through the arch structure 2 that the slope set up stabilizes the basement rock at the bottom of the slope, reduces the pressure that arch structure 2 received, improves the reliability of retaining structure. Preferably, the bottom and the top of the arch structure 2 form an included angle of 70 degrees, and through tests, when the bottom and the top of the arch structure 2 form an included angle of 70 degrees, the soil pressure acting on the arch structure 2 is reduced by about 30%.
According to the invention, the soil pressure (landslide thrust) is converted into the radial pressure of the arch through the arch structure, the advantage of high compressive strength of a concrete material is fully utilized, one part of axial force of the arch at the position of the support (the joint of the arch structure 2 and the pile) is balanced, and the other part of axial force is left and right matched with the support. Which reduces the load of the support generalized slide pile 1. An inter-arch unloading platform 3 is arranged between two adjacent arch structures 2 behind the anti-slide pile 1, wherein the inter-arch unloading platform 3 is a reinforced concrete structure plate, the width and the height of the inter-arch unloading platform 3 are determined according to specific calculation, and the anti-overturning moment is provided by the inter-arch unloading platform 3, so that the section and the reinforcing bars of the pile are greatly reduced. The piles and the arch structures 2 are connected into a whole through the inter-arch unloading platform 3, so that the overall stability and rigidity of the structure are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a stake encircles joint retaining structure, its characterized in that includes a plurality of just anti-slide pile (1) of vertical setting side by side, the lower extreme of anti-slide pile (1) is embedded and is fixed in side slope bottom of slope stable basement rock, adjacent two all be equipped with between anti-slide pile (1) and be arched domes (2), the extrados of domes (2) faces the sky side of facing of side slope, two hunch feet of domes (2) respectively with adjacent two anti-slide pile (1) fixed connection, adjacent two all fixedly be equipped with between hunch off-load platform (3) between the extrados of domes (2).
2. A pile-arch joint retaining structure according to claim 1, wherein the axis and the outer diameter of the upper and lower parts of the arch structure (2) are the same.
3. A pile-arch joint retaining structure according to claim 1, wherein the arch structure (2) has a lower portion with a smaller outer diameter than an upper portion.
4. A pile-arch joint retaining structure according to any one of claims 1 to 3, characterized in that the slide-resistant pile (1) comprises a slide-resistant pile body (4), and the arch foot of the arch structure (2) is fixedly connected with the slide-resistant pile body (4).
5. A pile-arch joint retaining structure according to any one of claims 1 to 3, wherein the slide-resistant piles (1) comprise rear piles (5) and front piles (6), the arch feet of the arch structure (2) are fixedly connected with one side of the rear piles (5) facing a side slope, the front piles (6) are arranged on one side of the rear piles (5) far away from the side slope, the front piles (6) are arranged at intervals with the rear piles (5), and supporting beams (7) are fixedly arranged between the tops of the rear piles (5) and the tops of the front piles (6).
6. A pile-arch joint retaining structure according to any one of claims 1 to 3, the anti-slide piles (1) comprise rear-row straight piles (8), front-row straight piles (9) and front-row inclined piles (10), the arch foot of the arch structure (2) is fixedly connected with one side of the rear row of straight piles (8) facing the side slope, the front row of straight piles (9) and the front row of inclined piles (10) are arranged on one side of the rear row of straight piles (8) far away from the side slope, the top height of the front row of straight piles (9) is lower than the height of the rear row of straight piles (8), the top end of the front row of straight piles (9) is fixedly connected with the lower end of the front row of inclined piles (10) in an integrated manner, the top end of the front row of inclined piles (10) is obliquely arranged towards the top end of the rear row of straight piles (8), and the top end of the front row of inclined piles (10) is fixedly connected with the top end of the rear row of straight piles (8).
7. A pile-arch joint retaining structure according to any one of claims 1 to 3, wherein the slide-resistant piles (1) comprise truss back piles (11) and truss front piles (12), the arch foot of the arch structure (2) is fixedly connected with one surface of the truss back piles (11) facing the side slope, the truss front piles (12) are arranged on one side of the truss back piles (11) far away from the side slope, and a supporting truss (13) for connecting the truss back piles (11) with the truss front piles (12) is arranged between the truss back piles (11) and the truss front piles (12).
8. A pile-arch combination retaining structure according to any one of claims 1 to 3, wherein the inter-arch unloading platform (3) is of a reinforced concrete structure, and the inter-arch unloading platform (3) is arranged at a distance from the upper surface of the slope bottom stable bedrock.
9. A construction method of a pile-arch combination retaining structure according to any one of claims 1 to 8, comprising the steps of:
step one, constructing an anti-slide pile (1): determining the position of the anti-slide pile (1), and constructing the anti-slide pile (1) at the designated position in a static pressure or drilling hole insertion or drilling hole concrete pouring mode;
step two, arranging an arch structure (2): an arch structure (2) is arranged between two adjacent anti-slide piles (1), and arch feet of the arch structure (2) are fixedly connected with the two adjacent anti-slide piles (1) respectively;
step three, arranging an inter-arch platform: pouring an inter-arch unloading platform (3) between two adjacent arch structures (2) to ensure that the inter-arch unloading platform (3) is fixedly connected with the outer arc surfaces of the two adjacent arch structures (2);
step four, repeating the step one to the step three until all the anti-slide piles (1), the arch structures (2) and the inter-arch platforms are installed;
and fifthly, filling soil behind the wall, and filling soil between the side slope and the arch structure (2) to finish construction.
10. The construction method of a pile-arch combination retaining structure according to claim 9, wherein in the second step, the method of arranging the arch structure (2) between two adjacent slide-resistant piles (1) comprises: arranging an arch structure (2) between two adjacent slide-resistant piles (1) in a pouring mode; or hoisting the poured arch structure (2) between two adjacent anti-slide piles (1), and then respectively fixing the arch feet of the arch structure (2) on the two anti-slide piles (1) through rigid connecting pieces.
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| CN112627204A (en) * | 2020-12-28 | 2021-04-09 | 中水北方勘测设计研究有限责任公司 | Reinforcing structure of unstable side slope and construction method thereof |
| CN114411472A (en) * | 2022-02-07 | 2022-04-29 | 中国建筑第八工程局有限公司 | Assembly type square ground structure on basement top plate and construction method thereof |
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| CN109914439A (en) * | 2019-03-13 | 2019-06-21 | 深圳市工勘岩土集团有限公司 | Combined side slope construction method for supporting |
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| CN112627204A (en) * | 2020-12-28 | 2021-04-09 | 中水北方勘测设计研究有限责任公司 | Reinforcing structure of unstable side slope and construction method thereof |
| CN114411472A (en) * | 2022-02-07 | 2022-04-29 | 中国建筑第八工程局有限公司 | Assembly type square ground structure on basement top plate and construction method thereof |
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Application publication date: 20201218 |