CN212673968U - Earth rock foundation pit blasting excavation system - Google Patents
Earth rock foundation pit blasting excavation system Download PDFInfo
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- CN212673968U CN212673968U CN202021551397.0U CN202021551397U CN212673968U CN 212673968 U CN212673968 U CN 212673968U CN 202021551397 U CN202021551397 U CN 202021551397U CN 212673968 U CN212673968 U CN 212673968U
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Abstract
The utility model provides an earth rock foundation pit blasting excavation system, the diaphragm wall sets up on the stratum of foundation ditch periphery, the anchor bar upper end links as an organic wholely with the arrangement of reinforcement of diaphragm wall, the lower extreme inlays perpendicularly in the stratum, the engineering stake sets up in the stake hole in the foundation ditch, the stake hole sets up in foundation ditch central zone stratum, the crashproof rubber layer sets up the parcel at the exposed part of engineering stake, pre-buried drag hook sets up in diaphragm wall and engineering stake upper end, the protection network is fixed on pre-buried drag hook, set up at the foundation ditch mouth, construction platform sets up at engineering stake top, construction trestle one end sets up on construction platform, the other end sets up on diaphragm wall top, vertical big gun hole sets up in foundation ditch stratum central zone, the slant big gun hole sets up in the foundation ditch near the limit stratum zone; and finally, excavating the reserved after-excavation rock slope by adopting a cutting machine in combination with static blasting to form a natural rock supporting and retaining structure and ensure the nondestructive connection with the reinforced concrete diaphragm wall on the upper part.
Description
Technical Field
The utility model relates to a foundation ditch excavation field, in particular to soil rock foundation pit blasting excavation system.
Background
The urban space development is gradually shifted to the mode of mainly expanding all around and building a large number of high-rise buildings from the past to the mode of mainly developing and utilizing the tracks of the underground space, because the traditional mode of expanding the urban surrounding area is limited by limited land resources and the current system, and the mode of developing the urban surrounding area to high altitude, building high-rise layers, building high-rise viaducts and overpasses increases the urban space density, so that the urban space development gradually moves to vicious circle, and the outstanding contradictions and problems of the urban space development can be relieved only by developing and utilizing the urban underground space.
The construction of developing underground space often involves the foundation ditch excavation of different degree of depth, and the excavation often needs to combine the blasting excavation when supposing to meet soil rock geology deep foundation ditch excavation. In order to facilitate mechanical access and residue soil and stone transportation and prevent uneven settlement of displacement of surrounding buildings during excavation, slope excavation or vertical excavation is needed after supporting by a supporting structure. Although the slope excavation is more economical, the method is easy to overetch, occupies large space and is not suitable for the excavation of deep foundation pits, particularly urban deep foundation pits; and the traditional supporting structure is vertically excavated after being blocked, the supporting structure is complex and the engineering quantity is large, and the mechanical access and the residue soil stone transportation are not facilitated. In addition, more or less flying stones are generated during blasting excavation of the rock stratums, and risks are brought to engineering personnel and the surrounding environment.
Therefore, at present, an earth rock foundation pit blasting excavation system which is good in protection effect, convenient to construct and simple in supporting structure is needed to be sought.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a protecting effect is good, and the convenient and simple soil rock foundation ditch blasting excavation system of supporting structure of construction.
For the utility model purpose above realizing, this technical scheme provides an earth rock foundation hole blasting excavation system for blasting excavation foundation ditch, wherein the foundation ditch comprises the stratum) and the soil layer of arranging on the stratum in, include:
the construction method comprises the following steps of (1) connecting walls to the ground, engineering piles, construction trestles, construction platforms, pre-buried drag hooks, protective nets, vertical blast holes and oblique blast holes;
the underground diaphragm wall is arranged on a rock stratum around the foundation pit, a pile pit is formed by excavating the area where the foundation pit is located, the engineering pile is arranged in the pile pit in the foundation pit, the embedded drag hooks are arranged at the upper ends of the underground diaphragm wall and the engineering pile, and the protective net is fixed on the embedded drag hooks and is arranged at the top opening of the foundation pit;
the construction platform is arranged at the top end of the engineering pile, one end of the construction trestle is arranged on the construction platform, the other end of the construction trestle is arranged at the top end of the underground diaphragm wall, the vertical blast holes are arranged in the central area of the rock stratum of the foundation pit, the oblique blast holes are arranged in the area of the rock stratum close to the side of the foundation pit, and after blasting, rock slope is excavated in the reserved area of the rock stratum around the foundation pit.
Compared with the prior art, the technical scheme has the following characteristics and beneficial effects:
1. the engineering pile wrapped by the anti-collision rubber layer can be used as a structural support of a protective net at the top of a foundation pit and a support of an excavation operation construction platform.
2. The construction platform and the construction trestle which are arranged can be provided with hoisting equipment on the platform, construction equipment can enter and exit on the platform, and broken stones in the foundation pit can be conveniently hoisted out of the pit through a tower on the construction platform.
3. The totally-enclosed protective net is adopted, so that the construction site can be beautified, flying stones are prevented from flying out of the foundation pit, the building is convenient, the price is proper, the foundation pit can be protected from falling off due to the fact that constructors above the foundation pit are accidentally missed to a certain extent, and the construction safety is improved.
Drawings
FIG. 1 is a schematic diagram of an earth rock foundation pit blasting excavation system;
FIG. 2 is a schematic view of the layout of a diaphragm wall;
FIG. 3 is a schematic layout of a construction pile;
FIG. 4 is a schematic layout of a construction platform, a construction trestle and a protective net;
figure 5 is a schematic illustration of pile pit excavation.
Wherein: 1-soil layer; 2-diaphragm wall; 3-a rock formation; 4-anchor bar; 5-digging rock mass; 6-engineering pile; 7-construction trestle; 8-construction platform; 9-embedding a drag hook; 10-protective net; 11-a rubber bumper layer; 12-pile pit; 13-vertical blast hole; 14-oblique blast hole; 15-foundation pit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
A soil rock foundation pit blasting excavation system is used for blasting excavation of a foundation pit 15, wherein the foundation pit 15 consists of a rock stratum 3 and a soil layer 1 arranged on the rock stratum 3, and comprises a ground connecting wall 2, anchor bars 4, a rear excavation rock body 5, an engineering pile 6, a construction trestle 7, a construction platform 8, a pre-buried draw hook 9, a protective net 10, an anti-collision rubber layer 11, a pile pit 12, a vertical blast hole 13 and an oblique blast hole 14.
The diaphragm wall 2 is arranged on a rock stratum 3 at the periphery of the foundation pit 15, specifically, the lower end of the anchor bar 4 is vertically embedded into the rock stratum 3, the upper end of the anchor bar 4 is connected with the reinforcement of the diaphragm wall 2 into a whole, and then the diaphragm wall 2 is firmly fixed on the rock stratum (3) to surround the area where the foundation pit 15 is located.
Wherein correspond in the work progress, confirm the position of ground wall 2 in advance in the construction ground of foundation ditch 15 periphery, adopt hydraulic grab grooving machine to dig the grooving fast in soil layer 1 in this position, the groove depth reachs stratum 3, beat perpendicularly in stratum 3 and establish anchor bar 4, then toward the inslot hoisting the steel reinforcement cage, connect into an organic whole with stirrup with steel reinforcement cage and 4 upper portions of anchor bar, set up a plurality of pre-buried drag hooks 9 according to certain horizontal interval in the upper end of steel reinforcement cage, and pour concrete into the steel reinforcement cage and become holistic ground wall 2, wherein pre-buried drag hook 9 sets up the upper end at ground wall 2.
A pile pit 12 is formed by excavating the area of the foundation pit 15, the pile pit 12 is arranged in the central area of the rock stratum 3 of the foundation pit area, and the engineering pile 6 is arranged in the pile pit 12 in the foundation pit 15. Specifically, the engineering pile 6 is driven into the bottom of the pile pit 12 to the designed depth, and the elevation of the top of the engineering pile 6 is the excavation elevation of the foundation pit 15.
The rubber layer 11 is arranged to wrap the exposed part of the construction pile 6.
The pre-buried drag hook 9 is arranged at the upper end of the underground diaphragm wall 2 and the engineering pile 6, and the protective net 10 is fixed on the pre-buried drag hook 9 and arranged at the top opening of the foundation pit 15.
The vertical blast hole 13 is arranged in the central area of the rock stratum 3 of the foundation pit, the oblique blast hole 14 is arranged in the area of the rock stratum 3 near the edge of the foundation pit, and after blasting, a slope of the back-excavated rock 5 is reserved in the area of the rock stratum 3 around the foundation pit. Specifically, the vertical blast holes 13 and the oblique blast holes 14 are filled with powder to blast and excavate the 3 main bodies of the rock stratum in the foundation pit 15, hoisting tools such as a tower crane are installed on the construction platform 8, part of the protective nets 10 on the periphery of the construction platform 8 are lifted, slag stone hoisting and outward transportation are carried out, finally, the reserved rear excavated rock mass 5 slope of the blasting is excavated by combining a cutting machine with static blasting, a natural rock supporting structure is formed, lossless connection with the reinforced concrete underground diaphragm wall 2 on the upper portion is guaranteed, and construction of a soil rock foundation pit blasting excavation system is completed.
The engineering pile 6 is a prefabricated reinforced concrete square pile.
The protection net 10 is a dense mesh type safety net woven by a special knitting method of a straight chain multi-door structure by adopting a brand-new high-density polyethylene monofilament material.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides an earth rock foundation hole blasting excavation system for blasting excavation foundation ditch (15), wherein foundation ditch (15) comprise rock stratum (3) and soil layer (1) of arranging on rock stratum (3) in, its characterized in that includes:
the construction method comprises the following steps of (1) forming a ground connection wall (2), an engineering pile (6), a construction trestle (7), a construction platform (8), pre-buried drag hooks (9), a protective net (10), vertical blast holes (13) and oblique blast holes (14);
the underground diaphragm wall (2) is arranged on a rock stratum (3) at the periphery of a foundation pit (15), a pile pit (12) is formed by excavating the area where the foundation pit (15) is located, an engineering pile (6) is arranged in the pile pit (12) in the foundation pit (15), pre-buried draw hooks (9) are arranged at the upper ends of the underground diaphragm wall (2) and the engineering pile (6), and a protective net (10) is fixed on the pre-buried draw hooks (9) and arranged at an opening at the top of the foundation pit (15);
construction platform (8) set up on engineering pile (6) top, construction trestle (7) one end sets up on construction platform (8), and the other end sets up on ground even wall (2) top, and vertical big gun hole (13) set up the central zone in rock stratum (3) of foundation ditch, and slant big gun hole (14) set up in the region of foundation ditch near limit rock stratum (3), dig rock mass (5) slope after the regional reservation of foundation ditch peripheral rock stratum (3) after the blasting.
2. The earth rock foundation pit blasting excavation system according to claim 1, wherein the lower end of the anchor bar (4) is vertically embedded in the rock stratum (3), and the upper end of the anchor bar (4) is connected with the reinforcement of the diaphragm wall (2) into a whole.
3. The earth-rock foundation pit blasting excavation system according to claim 1, characterized in that the pile pit (12) is arranged in the central area of the rock stratum (3) in the foundation pit area, the engineering pile (6) is excavated into the bottom of the pile pit (12), and the elevation of the top of the engineering pile (6) is the excavation elevation of the foundation pit (15).
4. The earth rock foundation pit blasting excavation system according to claim 1, characterized in that the bottom of the construction platform (8) and the top of the engineering pile (6) are connected by high-strength bolts, and two ends of the construction trestle (7) are fixedly connected to the construction platform (8) and the diaphragm wall (2) by high-strength bolts respectively.
5. The earth-rock foundation pit blasting excavation system according to claim 1, characterized in that the engineering pile (6) is a prefabricated reinforced concrete square pile.
6. The earth rock foundation pit blasting excavation system according to claim 1, wherein the protective net (10) is a dense mesh type safety net woven by a special weaving method of a straight-chain multi-door structure and adopting a fully-new high-density polyethylene monofilament material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021551397.0U CN212673968U (en) | 2020-07-30 | 2020-07-30 | Earth rock foundation pit blasting excavation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021551397.0U CN212673968U (en) | 2020-07-30 | 2020-07-30 | Earth rock foundation pit blasting excavation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212673968U true CN212673968U (en) | 2021-03-09 |
Family
ID=74816006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021551397.0U Expired - Fee Related CN212673968U (en) | 2020-07-30 | 2020-07-30 | Earth rock foundation pit blasting excavation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212673968U (en) |
-
2020
- 2020-07-30 CN CN202021551397.0U patent/CN212673968U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210309 |