CN110670600B - Thermal power plant confined space deep foundation pit pond construction safety enclosure device and method - Google Patents
Thermal power plant confined space deep foundation pit pond construction safety enclosure device and method Download PDFInfo
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- CN110670600B CN110670600B CN201910882792.2A CN201910882792A CN110670600B CN 110670600 B CN110670600 B CN 110670600B CN 201910882792 A CN201910882792 A CN 201910882792A CN 110670600 B CN110670600 B CN 110670600B
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 116
- 239000010959 steel Substances 0.000 claims description 116
- 239000002689 soil Substances 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 abstract description 5
- 238000011900 installation process Methods 0.000 abstract description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 19
- 238000003466 welding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
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Abstract
The invention discloses a thermal power plant confined space deep foundation pit pool construction safety enclosure device and a thermal power plant confined space deep foundation pit pool construction safety enclosure method, wherein the thermal power plant confined space deep foundation pit pool construction safety enclosure device comprises a first support pile for supporting a first foundation pit, a second support pile for supporting a second foundation pit, a fence and a guard plate, a plurality of first support piles and a plurality of second support piles are respectively positioned at corners of the first foundation pit and the second foundation pit, the bottoms of the second support piles are vertically connected with a first rod piece, the tops of the second support piles and the tail ends of the first rod pieces are both connected with diagonal rods, a triangular structure is formed among the second support piles, the first rod pieces and the diagonal rods, and the top ends of the first support piles are connected with the first rod pieces and the diagonal rods; the guard board is connected with the first support pile and/or the second support pile, and is clung to the inner wall of the first foundation pit and/or the second foundation pit; the fence is a round fence which is externally connected with a square or rectangular opening at the top of the second foundation pit. The method can simplify the installation process, reduce the influence of deep excavation of the foundation pit, and is suitable for a limited space.
Description
Technical Field
The invention relates to the field of foundation pit protection, in particular to a thermal power plant confined space deep foundation pit pool construction safety enclosure device and method.
Background
Deep foundation pit means a project where the depth of excavation is more than 5 meters (including 5 meters) or three or more layers of basement (including three layers), or where the depth is not more than 5 meters, but the geological conditions and surrounding environment and underground pipeline are particularly complicated. The foundation pit engineering is to excavate an underground space downwards from the ground, the periphery of a deep foundation pit is generally provided with a vertical soil retaining and enclosing structure, and the enclosing structure is generally a plate (pile) wall structure with a certain insertion depth below the substrate of the excavated surface; the plate (pile) wall has cantilever type, single-supporting type and multi-supporting type. The support structure is used for reducing deformation of the enclosure structure and controlling bending moment of the wall body; the two types of internal support and external anchor are divided.
The inventor believes that the existing foundation pit safety enclosure device mainly has the following disadvantages: (1) the foundation pit safety enclosure device is complex to install and long in construction time; (2) after the foundation pit safety enclosure device is installed, the existing foundation pit is blocked, and the deep excavation of the foundation pit is affected; (3) the foundation pit safety enclosure device occupies a larger space and is not suitable for a limited space.
Disclosure of Invention
Aiming at the defects of the existing thermal power plant, the invention aims to provide a thermal power plant limited space deep foundation pit pond construction safety enclosure device and a thermal power plant limited space deep foundation pit pond construction safety enclosure method, which can simplify the installation process, reduce the influence of deep excavation of the foundation pit and are suitable for limited space.
The invention provides a thermal power plant limited space deep foundation pit pool construction safety enclosure device.
The second object of the invention is to provide a foundation pit safety containment method for construction of a deep foundation pit pool in a limited space of a thermal power plant.
In order to achieve the above purpose, the present invention discloses the following technical solutions:
the invention discloses a thermal power plant confined space deep foundation pit pond construction safety enclosure device, which comprises a first support pile, a second support pile, a fence and a guard plate, wherein the first support pile is used for supporting a first foundation pit, the second support pile is used for supporting a second foundation pit, a plurality of first support piles and a plurality of second support piles are respectively positioned at corners of the first foundation pit and the second foundation pit, the bottom of each second support pile is vertically connected with a first rod piece, the top of each second support pile and the tail end of each first rod piece are connected with an inclined rod, a triangular structure is formed among each second support pile, each first rod piece and each inclined rod piece, and the top of each first support pile is connected with each first rod piece and each inclined rod; the guard board is connected with the first support pile and/or the second support pile, and is clung to the inner wall of the first foundation pit and/or the second foundation pit;
the fence is a round fence which is externally connected with a square or rectangular opening at the top of the second foundation pit.
Further, the device also comprises a Chinese character 'Hui' shaped protective net which covers the Chinese character 'Hui' shaped step surface at the joint of the first foundation pit and the second foundation pit.
Further, the protection net in the shape of a Chinese character 'hui' is connected with a plurality of second rod pieces, and the plurality of second rod pieces support the plate in the shape of a Chinese character 'hui'.
Further, the first support piles and the second support piles comprise four first steel columns and four second steel columns which are respectively used for supporting corners of the first foundation pit and the second foundation pit.
Further, the first rod piece is located on the inverted-U-shaped step surface at the joint of the first foundation pit and the second foundation pit.
Further, the backplate is the rectangle, first support stake or second support stake are connected to the both sides of backplate.
Further, the rail includes many stands and a plurality of curved containment sheet, and a plurality of stands set up around the opening of first foundation ditch, and a plurality of curved containment sheet connect between a plurality of stands.
Further, among the plurality of upright posts, four upright posts are clung to the corners of the opening of the first foundation pit.
Further, the guard plate comprises a double-layer steel wire mesh and filter cloth arranged in the double-layer steel wire mesh.
The invention further discloses a foundation pit safety enclosure method for construction of the deep foundation pit pool in the limited space of the thermal power plant, which comprises the following steps:
firstly, respectively fixing four second steel piles at four corners of a second foundation pit, respectively clinging to a plate on the inner walls of the four sides of the second foundation pit, and fixedly connecting the plate to the side edges of the second steel piles; the plate is formed by clamping filter cloth by double-layer steel wire meshes, so that soil blocks around the second foundation pit can be blocked and protected;
four first steel piles are respectively fixed at four corners of the first foundation pit, then a plate is respectively clung to the periphery of the inner wall of the first foundation pit, and the plate is fixedly connected to the side edges of the first steel piles; the plate also carries out certain enclosure on the soil blocks on the four inner walls of the first foundation pit;
paving a protective net on a stepped surface formed between a second foundation pit and a first foundation pit, connecting and fixing by using a second rod piece and a plate, fixing a first rod piece between the bottom of a second steel pile and the top of a first steel pile respectively, and installing an inclined rod between the top of the second steel pile and the top of the first steel pile so that a triangular structure is formed between the inclined support rod and the bottom support rod as well as between the inclined support rod and the second steel pile; the triangular structure can improve the support stability of the whole enclosure device;
eight upright posts are uniformly fixed at equal intervals at the tangential position of the periphery of the outer surface of the second foundation pit and the second foundation pit, and a containment plate is arranged between every two upright posts, so that a circular enclosing mechanism is formed between the containment plate and the upright posts, and the whole foundation pit is enclosed.
Compared with the prior art, the invention has the following beneficial effects:
1. in the invention, the shape of the circular fence is selected because a certain buffer area is needed for the opening of the first foundation pit, so that the side inner wall guard plate is prevented from being invalid due to overlarge vertical load, and in the corner area of the first foundation pit, the beam column structure of the first steel pile is more stable for the guard plate due to the existence of the first steel pile, so that the distance between the corner area of the first foundation pit and the fence can be closer. The fence of the circular structure, which is externally connected with the first foundation pit with the square opening surface, is effective for protecting the opening surface of the first foundation pit, and can protect the foundation pit in the narrowest area.
2. In the invention, the second steel pile, the inclined rod and the first rod piece form a right triangle structure with the inclined rod as an inclined edge and the second steel pile and the first rod piece as right-angle edges, the stress source of the second steel pile mainly comes from the side inner wall of the second foundation pit, and the side inner wall of the second foundation pit always has the force inclined inwards, so that the main stress direction of the second steel pile is inwards of the second foundation pit, and the inclined rod can provide the supporting force of the second steel pile in the direction of the reverse inner side of the second foundation pit (namely the direction of the outer side of the second foundation pit), thereby stabilizing the stability of the second steel pile in the vertical direction.
3. The second steel piles and the first steel piles are four and are arranged at four corners of the foundation pit, so that the main body of the foundation pit is not blocked.
4. The plate is tightly attached to the four inner walls of the foundation pit and is also fixed with the protective net, so that a first foundation pit and a second foundation pit synchronous support structure are formed.
5. In the invention, the top end of the first steel pile is connected with the first rod piece and the inclined rod through the fastener or the welding, so that the first rod piece can provide the tension force of the first steel pile to the outer side of the first foundation pit, and the inclined rod can provide the top end pressure of the first steel pile, thereby increasing the stability of the first steel pile.
6. According to the invention, the plate comprises the double-layer steel wire mesh and the filter cloth arranged in the double-layer steel wire mesh, so that the plate can form a closed baffle plate to shield soil in the foundation pit, the soil blocks are prevented from rolling down when the first foundation pit is excavated, and personnel injury is prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Figure 1 is a front view of the enclosure shown in example 1,
figure 2 is a top view of the enclosure of example 1,
fig. 3 is a schematic view of a guard plate structure in embodiment 1.
In the figure, 1, a first foundation pit; 2. a first steel pile; 3. the second foundation pit; 4. the second steel pile; 5. a column; 6. a containment plate; 7. a diagonal rod; 8. a first rod piece, 9, a protection plate; 10. a second rod member; 11. protective net 901, double-layer steel wire net; 902. and (5) filtering cloth.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As described in the background art, aiming at the defects of the existing thermal power plant, the invention aims to provide a thermal power plant limited space deep foundation pit pool construction safety enclosure device which can simplify the installation process, reduce the influence of deep excavation of a foundation pit, is suitable for limited space, and is further described with reference to the accompanying drawings and the specific embodiments.
Example 1
Firstly, it should be noted that, the embodiment discloses a thermal power plant confined space deep foundation pit pond construction safety enclosure device, its specific implementation environment is thermal power plant confined space deep foundation pit pond construction and uses the foundation ditch, specifically includes first foundation ditch 1 and second foundation ditch 3, and second foundation ditch 3 communicates first foundation ditch 1 in its bottom surface, and first foundation ditch 1 and second foundation ditch 3 are the cuboid form, and the cross sectional area of second foundation ditch 3 is greater than the cross sectional area of first foundation ditch 1, and the department of communicating of first foundation ditch 1 and second foundation ditch 3 has the step face.
Specifically, the safety enclosure device for the construction of the deep foundation pit pool in the confined space of the thermal power plant comprises a first steel pile 2 for supporting a first foundation pit 1, a second steel pile 4 for supporting a second foundation pit 3, a fence and a guard plate, wherein a plurality of first steel piles 2 and a plurality of second steel piles 4 are respectively positioned at corners of the first foundation pit 1 and the second foundation pit 3, the bottoms of the second steel piles 4 are vertically connected with a first rod piece 8, the tops of the second steel piles 4 and the tail ends of the first rod pieces 8 are both connected with an inclined rod 7, a triangular structure is formed among the second steel piles 4, the first rod pieces 8 and the inclined rod 7, and the first rod pieces 8 are actually arranged on a step surface, namely, the triangular structure transmits pressure borne by the triangular structure to the step surface and the inner wall of the foundation pit; the guard plate is connected with the first steel pile 2 and/or the second steel pile 4;
the inner walls of the first foundation pit 1 and the second foundation pit 3 are also provided with side inner wall guard plates;
the first steel pile 2, the second steel pile 4, the first rod piece 8, the inclined rod 7, the fence, the guard plate and the side inner wall guard plate are all connected to form a whole.
The guard plate is connected to the connection part of the first steel pile 2 and the second steel pile 4, and further, the bottom end of the first steel pile 2 is propped against the step surface, and the second steel pile 4 is propped against the bottom surface of the second foundation pit 3, so that the guard plate is actually located on the step surface.
The guard plate comprises a plate and a second rod piece 10, wherein the plate covers the second rod piece 10. The plate covers the stepped surface between the first foundation pit 1 and the second foundation pit 3.
Referring to fig. 2, the plate is in a shape of a Chinese character 'hui', and the second rod 10 includes a plurality of second rods 10 serving as a skeleton to support the Chinese character 'hui'.
The cross sections of the first foundation pit 1 and the second foundation pit 3 are square, the fence is round, and the circle formed by the fence is the circumcircle of the square opening of the first foundation pit 1.
The first steel piles 2 and the second steel piles 4 comprise four first steel columns and four second steel columns which are respectively used for supporting corners of the first foundation pit 1 and the second foundation pit 3.
In more detail, the plate comprises a double-layer steel wire gauze 901 and a filter cloth 902 arranged in the double-layer steel wire gauze 901, the plate can form a closed baffle plate to shelter from soil in the foundation pit, and soil blocks are prevented from rolling down when the first foundation pit 1 is excavated, so that personnel are injured.
Specifically, please refer to fig. 1, a second steel pile 4 is selected for analysis, the second steel pile 4 is located at a corner of the second foundation pit 3, the second steel pile 4 is tightly attached to the corner of the second foundation pit 3, so that the second steel pile 4 is perpendicular to the step surface, one end of the first rod member 8 is connected with the second steel pile 2 through a fastener or welding, the first rod member 8 is tiled on the step surface, and since the second steel pile 4 is perpendicular to the step surface, the second steel pile 4 is perpendicular to the first rod member 8, and the diagonal rod 7 is connected with the other end of the first rod member 8 and the top end of the second steel pile 4 through bolts or welding.
Therefore, as shown in fig. 1, the second steel pile 4, the diagonal rod 7 and the first rod 8 form a right triangle structure with the diagonal rod 7 as a hypotenuse and the second steel pile 4 and the first rod 8 as right-angle sides, the stress source of the second steel pile 4 is mainly from the side inner wall of the second foundation pit 3, and the side inner wall of the second foundation pit 3 always has a force inclined inwards, so that the main stress direction of the second steel pile 4 is inwards of the second foundation pit 3, and the diagonal rod 7 can provide the supporting force of the second steel pile 4 in the direction of the inner side of the reverse second foundation pit 3 (i.e. the direction of the outer side of the second foundation pit 3), thereby stabilizing the stability of the second steel pile 4 in the vertical direction.
It will be appreciated that the first rod member 8 is connected to the first steel pile 2 in addition to being able to serve as a connection between the diagonal rod 7 and the second steel pile 4, providing a certain pulling force to the diagonal rod 7.
Because the first steel pile 2 is located in the first foundation pit 1, and the stress condition of the first foundation pit 1 is different from the stress condition of the second foundation pit 3, because the distance between the first foundation pit 1 and the ground is far, and the cross-sectional area of the first foundation pit 1 relative to the second foundation pit 3 is small, the inward pressure of the first foundation pit 1 is small relative to the second foundation pit 3, and meanwhile, the first foundation pit 1 can continue to excavate downwards, and therefore, the first foundation pit 1 is only provided with four first steel piles 2 for supporting.
Simultaneously, the top of first steel pile 2 passes through fastener or welded connection with first member 8 and slant pole 7, therefore, first member 8 can provide the pulling force of first steel pile 2 to the outside of first foundation ditch 1, and slant pole 7 can provide the top pressure of first steel pile 2 to increase the stability degree of first steel pile 2.
The fence comprises a plurality of upright posts 5 and a plurality of arc-shaped containment plates 6, the plurality of upright posts 5 are arranged around the square opening of the second foundation pit 3, and the plurality of arc-shaped containment plates 6 are connected between the plurality of upright posts 5.
The plurality of posts 5 and the plurality of arcuate containment sheets 6 form a circular structure.
It will be appreciated that the circular structure of the fence circumscribing the second pit 3 having a square open face is effective protection for the open face of the second pit 3, enabling protection of the pit in the narrowest region. The shape of other more fitting fences is not selected because the opening of the second foundation pit 3 needs a certain buffer area to prevent the side inner wall guard plate from being invalid due to overlarge vertical load, and the beam column structure of the second steel pile 4 is more stable to the guard plate 9 in the corner area of the second foundation pit 3 due to the existence of the second steel pile 4, so that the distance between the side inner wall guard plate and the fences in the corner area of the first foundation pit is relatively short.
Example 2
The embodiment 2 discloses a foundation pit safety containment method for construction of a limited space deep foundation pit pool of a thermal power plant, which specifically comprises the following steps:
firstly, four second steel piles 4 are respectively fixed at four corners of a second foundation pit 3, then a plate is respectively clung to the inner walls of the four sides of the second foundation pit 3, and the plate is fixedly connected to the side edges of the second steel piles 4; the plate is formed by clamping filter cloth 902 by double-layer steel wire meshes 901, so that soil blocks around the second foundation pit 3 can be blocked and protected;
four first steel piles 2 are respectively fixed at four corners of the first foundation pit 1, then a plate is respectively clung to the periphery of the inner wall of the first foundation pit 1, and the plate is fixedly connected to the side edges of the first steel piles 2; the plate also carries out certain enclosure on soil blocks on the four inner walls of the first foundation pit 1;
the protection net 11 is paved on a stepped surface formed between the second foundation pit 3 and the first foundation pit 1, a second rod piece 10 and a plate are used for connection and fixation, then a first rod piece 8 is respectively fixed between the bottom of the second steel pile 4 and the top of the first steel pile 2, and an inclined rod 7 is arranged between the top of the second steel pile 4 and the top of the first steel pile 2, so that a triangular structure is formed between the inclined support rod and the bottom support rod as well as between the second steel pile 4; the triangular structure can improve the support stability of the whole enclosure device;
eight upright posts 5 are uniformly fixed at equal intervals at the tangential position of the periphery of the outer surface of the second foundation pit 3 and the second foundation pit 3, and a containment plate 6 is arranged between every two upright posts 5, so that a circular enclosing mechanism is formed between the containment plate 6 and the upright posts 5, and the whole foundation pit is enclosed.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A thermal power plant confined space deep foundation pit pond construction safety enclosure device is characterized in that a specific implementation environment is that a second foundation pit is communicated with a first foundation pit at the bottom surface of the second foundation pit, the cross-sectional area of the first foundation pit and the second foundation pit are cuboid, the cross-sectional area of the second foundation pit is larger than that of the first foundation pit, a stepped surface is arranged at the communication part of the first foundation pit and the second foundation pit, the thermal power plant confined space deep foundation pit pond construction safety enclosure device comprises a first steel pile for supporting the first foundation pit, a second steel pile for supporting the second foundation pit, a fence and a guard plate, a plurality of first steel piles and a plurality of second steel piles are respectively positioned at corners of the first foundation pit and the second foundation pit, the bottom of each second steel pile is vertically connected with a first rod, the top of each second steel pile and the tail end of each first rod are connected with an oblique rod, a triangular structure is formed among the second steel piles, the first rod and the oblique rods, and the top of each first steel pile is connected with the first rod and the oblique rods; the guard board is connected with the first steel pile and/or the second steel pile, and is clung to the inner wall of the first foundation pit and/or the second foundation pit;
the fence is a circular fence externally connected with a square or rectangular opening at the top of the second foundation pit;
the second foundation pit is provided with a second foundation pit, and the second foundation pit is provided with a second foundation pit; the first rod piece is positioned on the inverted-U-shaped step surface at the joint of the first foundation pit and the second foundation pit; the fence comprises a plurality of upright posts and a plurality of arc-shaped containment plates, the plurality of upright posts are arranged around the opening of the second foundation pit, and the plurality of arc-shaped containment plates are connected among the plurality of upright posts; four upright posts are tightly attached to corners of the opening of the second foundation pit; the guard plate comprises a double-layer steel wire mesh and filter cloth arranged in the double-layer steel wire mesh.
2. The thermal power plant confined space deep foundation pit pond construction safety enclosure device according to claim 1, wherein the back-shaped protection net is connected to a plurality of second rods, and the plurality of second rods support back-shaped plates.
3. The thermal power plant confined space deep foundation pit pond construction safety enclosure device according to claim 1, wherein four first steel piles and four second steel piles are respectively arranged on the first steel piles and the second steel piles and are respectively used for supporting corners of the first foundation pit and corners of the second foundation pit.
4. The thermal power plant confined space deep foundation pit pond construction safety enclosure device according to claim 1, wherein the guard plate is rectangular, and two sides of the guard plate are connected with the first steel pile or the second steel pile.
5. A thermal power plant confined space deep foundation pit pool construction safety containment method comprises the following steps:
firstly, respectively fixing four second steel piles at four corners of a second foundation pit, respectively clinging to a plate on the inner walls of the four sides of the second foundation pit, and fixedly connecting the plate to the side edges of the second steel piles; the plate is formed by clamping filter cloth by double-layer steel wire meshes, so that soil blocks around the second foundation pit can be blocked and protected;
four first steel piles are respectively fixed at four corners of the first foundation pit, then a plate is respectively clung to the periphery of the inner wall of the first foundation pit, and the plate is fixedly connected to the side edges of the first steel piles; the plate also carries out certain enclosure on the soil blocks on the four inner walls of the first foundation pit;
paving a protective net on a stepped surface formed between a second foundation pit and a first foundation pit, connecting and fixing by using a second rod piece and a plate, fixing a first rod piece between the bottom of a second steel pile and the top of a first steel pile respectively, and installing an inclined rod between the top of the second steel pile and the top of the first steel pile so that a triangular structure is formed between the inclined support rod and the bottom support rod as well as between the inclined support rod and the second steel pile; the triangular structure can improve the support stability of the whole enclosure device;
eight upright posts are uniformly fixed at equal intervals at the tangential position of the periphery of the outer surface of the second foundation pit and the second foundation pit, and a containment plate is arranged between every two upright posts, so that a circular enclosing mechanism is formed between the containment plate and the upright posts, and the whole foundation pit is enclosed.
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| CN107419731A (en) * | 2017-08-04 | 2017-12-01 | 广州市市政工程设计研究总院 | A kind of board-like double-row pile foundation pit support structure of counterfort and its construction method |
| CN207362854U (en) * | 2017-09-30 | 2018-05-15 | 中铁十局集团城市轨道交通工程有限公司 | A kind of deep basal pit one side formwork supporting structure |
| CN108951647A (en) * | 2018-07-18 | 2018-12-07 | 中铁十二局集团第二工程有限公司 | Construction method for supporting is excavated in hole in the hole of open trench tunnel |
| CN211523222U (en) * | 2019-09-18 | 2020-09-18 | 中国电建集团山东电力建设第一工程有限公司 | Thermal power plant confined space deep basal pit pond construction safety enclosure device |
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