CN115288153A - Underground passage deep foundation pit excavation supporting structure and construction process thereof - Google Patents
Underground passage deep foundation pit excavation supporting structure and construction process thereof Download PDFInfo
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- CN115288153A CN115288153A CN202210988044.4A CN202210988044A CN115288153A CN 115288153 A CN115288153 A CN 115288153A CN 202210988044 A CN202210988044 A CN 202210988044A CN 115288153 A CN115288153 A CN 115288153A
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 238000009412 basement excavation Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 4
- 210000002421 cell wall Anatomy 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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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
- 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
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Abstract
The utility model relates to an underground passage deep foundation pit excavation supporting structure and a construction process thereof, belonging to the technical field of municipal road construction, comprising a plurality of upright columns and surrounding plates, wherein all upright columns are arranged in parallel along the same direction, the adjacent upright columns are arranged at intervals on the inner wall of the surrounding plate along the space formed by the surrounding plates, the surrounding plates are connected with the outer walls of the upright columns in a sliding way, the sliding direction slides along the length direction of the upright columns, one end of each upright column is fixed with a lug, the other end of each upright column is provided with a groove, a plurality of upright columns and one surrounding plate form an assembling unit, the assembling units are provided with a plurality of assembling units, and the adjacent assembling units are fixed in an inserting way from head to tail; be provided with first screw on the stand, the lug is inserted and is inlayed in the recess, and first screw runs through lug and recess and stand threaded connection, and this application has quick installation, promotes the efficiency of construction, saves the effect of construction man-hour.
Description
Technical Field
The application relates to the technical field of municipal road construction, in particular to an underground passage deep foundation pit excavation supporting structure and a construction process thereof.
Background
In the municipal road construction, the excavation of an underground passage needs to be carried out firstly, and the deep foundation pit refers to the excavation depth of more than 5m and contains 5m. The deep foundation pit support is particularly important in deep foundation pit construction.
The method comprises the steps of surveying the surrounding environment and the geology before excavation and supporting of the deep foundation pit, preparing before construction, constructing a cement-soil mixing pile water-stop curtain, excavating stage by stage, sequentially carrying out earthwork excavation, plain concrete spraying construction, crown beam construction, inner support construction, continuing earthwork excavation, continuing plain concrete spraying, then inner support construction, and carrying out waist beam construction according to the engineering in the middle.
Support before the construction can with the steel structure post vertical insert earlier and inlay the underground, along with the excavation of foundation ditch, the steel structure post is just dug out gradually, and the steel structure post adopts the welding to form in the building site, and also adopts field weld bracket and loading board on the steel structure post when supporting in with the steel structure column connection to vertical support's effect is played to the internal support, avoids the interior support process, resists the trend of sinking at interior support middle part.
In the field construction, the inventor thinks that the steel structure column welds according to the foundation ditch pre-excavation degree of depth scene, has the defect that the efficiency of construction is low, and the construction period is long.
Disclosure of Invention
In order to accelerate the construction of the inner support, improve the construction efficiency and save the construction period, the application provides an underground passage deep foundation pit excavation supporting structure and a construction process thereof.
The utility model provides an underground passage deep basal pit excavation supporting construction, adopts following technical scheme:
the underground passage deep foundation pit excavation supporting structure comprises a plurality of stand columns and surrounding plates, wherein the stand columns are arranged in parallel along the same direction, adjacent stand columns are arranged on the inner wall of the surrounding plate at intervals along the space formed by the surrounding plates, the surrounding plates are connected with the outer wall of the stand columns in a sliding mode, the sliding direction slides along the length direction of the stand columns, a convex block is fixed to one end of each stand column, a groove is formed in the other end of each stand column, the stand columns and the surrounding plates form an assembling unit, the assembling units are arranged in a plurality, and the adjacent assembling units are fixed in an end-to-end inserting and embedding mode; be provided with first screw on the stand, the lug is inserted and is inlayed in the recess, and first screw runs through lug and recess and stand threaded connection.
Through adopting above-mentioned technical scheme, need squeeze into the ground with a plurality of steel structure posts of assembling the unit constitution before the foundation ditch excavation, and a plurality of units of assembling adopt the connected mode of head and the tail plug-in embedding to fix through first screw, realized the effect of swiftly assembling on the scene, compare in field weld, reached and saved man-hour, promote the effect of efficiency of construction.
Optionally, the surrounding plate slides along a position close to or far away from the joint of the adjacent assembling units, a clamping groove is formed in the surrounding plate, the clamping groove is formed along the length direction of the upright column, one end, close to the lug, of the clamping groove penetrates through the end face of the surrounding plate, a nut exposed by the first screw is clamped and embedded in the clamping groove, and the surrounding plate stretches across the joint of the adjacent assembling units; be provided with locating component on the bounding wall, locating component is used for the bounding wall to span and locks the position of bounding wall on the stand behind the adjacent unit handing-over position of assembling.
Through adopting above-mentioned technical scheme, the existence of bounding wall is not only one of the skeleton as the steel structure post, and the mode that slides and set up can also conceal first screw, and the setting of draw-in groove has played limiting displacement to first screw, avoids not hard up of first screw, and locating component's setting has played the effect of fixed bounding wall, guarantees that the steel structure post inserts the in-process of inlaying to ground inside, and the bounding wall plays concealed effect to first screw all the time.
Optionally, a hidden groove and an accommodating groove are formed in the outer wall of the enclosing plate, the hidden groove and the accommodating groove are both formed along the direction perpendicular to the moving direction of the enclosing plate, the central lines of the hidden groove and the accommodating groove are collinear, and the accommodating groove is located at the bottom of the hidden groove and has a diameter smaller than the diameter of the hidden groove; the stand is provided with a positioning hole, a thread area is arranged in the positioning hole, the thread area is located at the position close to the bottom of the positioning hole, the positioning assembly comprises a second screw and a spring, the spring ring is sleeved on the outer wall of the second screw, one end of the spring is fixedly connected with the wall of the accommodating groove, the other end of the spring is fixedly connected with the second screw, and the second screw penetrates through the accommodating groove and then is in threaded connection with the positioning hole.
Through adopting above-mentioned technical scheme, span adjacent unit handing-over department of assembling when the bounding wall after, first screw inlay card is in the draw-in groove, and the second screw receives the drawing inlay card of spring and inlays in the locating hole this moment, then the manual work rotates the second screw, and the second screw forms threaded connection with the stand, and the offering of hidden groove and holding tank provides hidden space for locating component, has guaranteed that the steel constructs the smooth and easy of post to ground interpolation inlay.
Optionally, a support assembly is arranged on the assembling unit, the support assembly includes a carrier plate, a fixed slat, an installation slat and a U-shaped bolt, one end of the fixed slat is fixedly connected with the carrier plate, the other end of the fixed slat is hinged with the installation slat, and a hinged shaft is horizontally arranged; when single supporting component with assemble the unit fixed, fixed slat and bounding wall top surface butt, installation slat and bounding wall outer wall butt, U type bolt run through installation slat and bounding wall and can dismantle with the bounding wall and be connected.
By adopting the technical scheme, the support component is used for supporting the horizontal inner support in the foundation pit and resisting the sinking trend of the middle part of the inner support. When the supporting component is installed, the fixing strip plate is overlapped at the top of the enclosing plate with the corresponding height, then the installing strip plate and the enclosing plate can be fixed through the U-shaped bolt, the horizontal inner support is overlapped at the top of the support plate, the operation is simple and convenient, the quick installation and disassembly are realized, and the effect of saving the working hours is achieved.
Optionally, the carrier plate is provided with a fixing hole, the fixing hole and the fixing slat are located on the same side wall of the carrier plate, and the fixing hole is located right below the fixing slat; when a plurality of supporting components are fixed with the assembly unit, the adjacent supporting components are symmetrically arranged on two sides of the assembly unit, the end parts of the installation strip plates penetrate through the coamings and then are inserted into the right fixing holes, the U-shaped bolts vertically penetrate through the support plate and the installation strip plates in the fixing holes, and the U-shaped bolts are detachably connected with the support plate.
Through adopting above-mentioned technical scheme, seting up of fixed orifices makes supporting component can be located same vertical height and be located and assemble the unit both sides, and supporting component openly places and the cooperation is used to the reverse side of placing, reaches the effect that same component used of mutually supporting, makes the supporting component utilization ratio maximize.
Optionally, a yielding hole is formed in the carrier plate, and the yielding hole is formed in the direction away from the enclosing plate.
Through adopting above-mentioned technical scheme, support in the level in the deep basal pit in the building site and often adopt the steel pipe, connect through the ring flange between the steel pipe, and the steel pipe steel is when the support plate top, and the hole of stepping down provides the space of stepping down for the faraday disk of adjacent steel pipe tip, guarantees that the steel pipe outer wall can the butt at the support plate top.
Optionally, spacing hole has been seted up on the bounding wall, and spacing hole has been seted up a plurality ofly, and all spacing holes are rectangular array and arrange on the bounding wall, and fixed slat runs through corresponding spacing hole, and behind installation slat and bounding wall outer wall butt, U type bolt runs through its spacing hole and the installation slat that corresponds.
Through adopting above-mentioned technical scheme, no matter whether supporting component is single fixed with the bounding wall, still a plurality of supporting component are fixed with the bounding wall simultaneously, all insert and inlay in the spacing downthehole that corresponds, have increased the linkage effect of supporting component and bounding wall, have promoted the stability after the supporting component installation.
Optionally, a positioning rope is arranged on the carrier plate, one end of the positioning rope is fixedly connected with the carrier plate, and the other end of the positioning rope is detachably connected with the surrounding plate.
Through adopting above-mentioned technical scheme, the setting of location rope can not only play the effect that hangs the support to the support plate, support then fixed with the bounding wall hook once inside when location rope ring cover, can also play spacing effect to interior support.
Optionally, the end face of the enclosing plate close to the bump is an inclined end face, and the inclined direction is arranged obliquely downwards along the direction close to the upright post.
Through adopting above-mentioned technical scheme, the setting of bounding wall slope terminal surface, the pointed end has the ability of breaking ground, when being convenient for the steel structure post inlays to ground interpolation, inserts more smoothly that inlay.
In a second aspect, the application provides a construction process for an underground passage deep foundation pit excavation supporting structure, which adopts the following technical scheme:
a construction process of an underground passage deep foundation pit excavation supporting structure comprises the following steps:
s1, assembling units are installed on site, and the assembled units are inserted underground after being assembled;
s2, excavating the foundation pit in a layered mode, excavating to a specified elevation, cleaning the exposed assembly units, and cleaning soil in the enclosing plate;
s3, fixing the support assembly on the assembling unit;
s4, placing the inner support on the supporting assembly, and fixedly connecting two ends of the inner support with the corresponding crown beam or waist beam;
s5, when the steel structure column is dismantled, the U-shaped bolt, the positioning rope and the first screw are directly dismantled.
By adopting the technical scheme, the mode of on-site mechanical assembly is adopted, so that time can be saved compared with on-site welding, the mode of on-site mechanical assembly is also adopted for the support assembly and the assembly unit, the support in the vertical direction of the middle part of the support in the foundation pit is convenient, and the mode of mechanical assembly is integrally adopted, so that subsequent disassembly is also convenient.
In summary, the present application includes at least one of the following beneficial technical effects:
1. due to the adoption of the assembling units, the installation time of the steel structure column is saved, and meanwhile, the first screws are limited and protected due to the sliding arrangement of the coamings;
2. the arrangement of the supporting component is matched with the surrounding plate, so that the front surface and the back surface of the supporting component can be used and matched with each other, and the utilization rate of the supporting component is maximized;
3. the effect of location rope not only plays the effect of suspension support to the support plate but also plays spacing effect to the horizontal support in the foundation ditch.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is a schematic view of a single construction of a building block;
FIG. 3 is a cross-sectional view of adjacent splice units after splicing;
FIG. 4 is a partial schematic view showing the individual support assemblies secured to the construction elements;
FIG. 5 is a partial schematic view of two symmetrically disposed support assemblies secured to a construction element;
FIG. 6 is a view showing the two support members in a forward and reverse orientation.
Description of reference numerals: 1. assembling units; 11. a column; 111. a bump; 112. a groove; 12. enclosing plates; 121. a slider; 122. a slideway; 123. a card slot; 124. a limiting hole; 2. a first screw; 3. a positioning assembly; 31. a second screw; 32. a spring; 4. a hidden slot; 41. accommodating grooves; 42. positioning holes; 5. a support assembly; 51. a carrier plate; 52. fixing the ribbon board; 53. installing a batten; 54. a U-shaped bolt; 6. a fixing hole; 7. a hole of abdication; 8. and (6) positioning the rope.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses underground passage deep basal pit excavation supporting construction.
Referring to fig. 1, an underground passage deep basal pit excavation supporting construction is including assembling unit 1 and supporting component 5, it is provided with a plurality ofly to assemble unit 1, the connection can be dismantled from beginning to end to adjacent unit 1 of assembling, thereby assemble into complete steel structure post, supporting component 5 can be dismantled with assembling unit 1 and be connected, supporting component 5 is used for bearing the interior level of foundation ditch and supports, support the trend that the middle part descends in resisting the interior level of foundation ditch, wholly adopt the pin-connected panel, easy operation is convenient, reach the effect of saving construction period.
Referring to fig. 1 and 2, the assembling unit 1 includes a plurality of upright columns 11 and surrounding plates 12, the upright columns 11 are provided with a plurality of pieces and are all arranged along the same direction, in this embodiment, the number of the upright columns 11 in the single assembling unit 1 is four, and the surrounding plates 12 are rectangular frame-shaped surrounding plates 12. The upright post 11 is located on the inner wall of the enclosing plate 12, and is located at the four corners of the rectangular frame enclosed by the enclosing plate 12, the upright post 11 is provided with a slide rail 122, the inner wall of the enclosing plate 12 is fixed with a slide block 121 at a corresponding position, the slide block 121 slides in the slide rail 122, namely, the enclosing plate 12 slides along the length direction of the upright post 11.
Referring to fig. 2 and 3, a groove 112 is formed in one end of each upright post 11, a bump 111 is fixed to the other end of each upright post 11, when adjacent assembling units 1 are connected end to end, the bumps 111 of the adjacent upright posts 11 are inserted into the grooves 112 of the corresponding upright posts 11, first screws 2 are arranged on the upright posts 11, the first screws 2 penetrate through the grooves 112 and the bumps 111 located in the grooves 112, and the first screws 2 are in threaded connection with the upright posts 11.
Referring to fig. 2 and 3, the upright post 11 is vertically downward, and the end surface of the bottom end of the coaming 12 is an inclined end surface, and the inclined direction is obliquely downward along the direction close to the upright post 11. The draw-in groove 123 has been seted up on the bounding wall 12 inner wall, and the draw-in groove 123 is seted up along 11 length direction of stand, and the tip that the draw-in groove 123 is close to 12 inclined end faces of bounding wall opens thoroughly 12 terminal surfaces, slides bounding wall 12 along 11 length direction of stand, and the nut inlay card of first screw 2 is in draw-in groove 123, and bounding wall 12 spanes adjacent unit 1 handing-over department of assembling.
Referring to fig. 2 and 3, the enclosing plate 12 is provided with a positioning assembly 3, the positioning assembly 3 comprises a second screw 31 and a spring 32, and the positioning assembly 3 locks the position of the enclosing plate 12 and the upright 11. Hidden groove 4 and holding tank 41 have been seted up on bounding wall 12, hidden groove 4 and holding tank 41 are all seted up along perpendicular stand 11 direction, holding tank 41 is located hidden groove 4 tank bottom, holding tank 41 diameter is less than hidden groove 4 diameter, spring 32 ring cover is on second screw 31 outer wall, spring 32 one end and 41 tank wall fixed connection of holding tank, the other end and second screw 31 fixed connection, locating hole 42 has been seted up on the stand 11, locating hole 42 is seted up along perpendicular stand 11 direction, locating hole 42, holding tank 41 and 4 three's of hidden groove central line collineation, the nut of second screw 31 self is accomodate at hidden groove 4, second screw 31 pointed end is run through behind holding tank 41 tank bottom and is inserted and inlay in locating hole 42, the threaded area has been seted up to locating hole 42 hole bottom department, second screw 31 and locating hole 42 threaded connection.
Referring to fig. 4, the surrounding plate 12 is provided with a plurality of limiting holes 124, the limiting holes 124 are provided in a plurality, adjacent limiting holes 124 on a single side wall of the surrounding plate 12 are distributed in a rectangular array, and four limiting holes 124 are distributed on a single side wall of the surrounding plate 12 in the embodiment of the present application. The supporting component 5 comprises a support plate 51, fixed slats 52, mounting slats 53 and U-shaped bolts 54, one end of each fixed slat 52 is fixedly connected with the support plate 51, the other end of each fixed slat is hinged to the mounting slat 53, the hinge shaft is horizontally arranged, the fixed slats 52 and the mounting slats 53 in the single supporting component 5 are respectively arranged in two, the adjacent fixed slats 52 are located on the same vertical side wall of the support plate 51 and are arranged at intervals, and the distance between the adjacent fixed slats 52 is the same as the distance between the adjacent limiting holes 124 on the single side wall of the enclosure 12. When a single supporting component 5 is fixed with the assembling unit 1, two fixing modes are available, namely: the fixed strip plate 52 is lapped on the top of the enclosing plate 12, the installation strip plate 53 is abutted against the vertical outer wall of the enclosing plate 12, the U-shaped bolt 54 penetrates through the installation strip plate 53 and the corresponding limiting hole 124 on the enclosing plate 12, the installation strip plate 53 is fixed with the enclosing plate 12 by the U-shaped bolt, and the top of the carrier plate 51 is abutted against the horizontal inner support in the foundation pit; and the second method comprises the following steps: because the limiting holes 124 on the coaming 12 are two rows, the fixed slat 52 is opposite to the limiting holes 124 on the upper row and penetrates through the limiting holes 124, then the installation slat 53 is abutted against the outer wall of the coaming 12, and the U-shaped bolt 54 penetrates through the installation slat 53 and the corresponding lower row of limiting holes 124 on the coaming 12.
Referring to fig. 5 and 6, a carrier plate 51 is provided with fixing holes 6 and relief holes 7, the fixing holes 6 and the fixing slats 52 are located on the same vertical side wall of the carrier plate 51, the fixing holes 6 are formed along the length direction of the fixing slats 52, the fixing holes 6 are located right below the fixing slats 52, and the number of the fixing holes 6 corresponding to the fixing slats 52 is formed; when a plurality of supporting components 5 are installed on the assembling unit 1, the adjacent supporting components 5 are located on two opposite sides of the assembling unit 1 and located at the same vertical height, the supporting components 5 on one side are normally placed, the supporting components 5 on the other side are turned over for 180 degrees and then used, the end portions of the mounting strips 53 in the two supporting components 5 are inserted into the fixing holes 6 of the other side, the fixing strips 52 penetrate through the limiting holes 124, the U-shaped bolts 54 vertically penetrate through the supporting plate 51 and the mounting strips 53 located in the fixing holes 6, and the end portions of the supporting plate 51 and the mounting strips 53 located in the supporting plate 51 are fixed by the U-shaped bolts 54. The hole of stepping down 7 is seted up along fixed slat 52 length direction, and the vertical terminal surface of support plate 51 is opened to the tip that the hole of stepping down 7 kept away from stand 11, and support plate 51 top surface accepts the interior level of foundation ditch and supports, and interior support building site adopts pipe welding and flange to connect and forms, and the setup of hole of stepping down 7 provides the space of placing for placing of ring flange.
Referring to fig. 5, a positioning rope 8 is disposed on the carrier plate 51, one end of the positioning rope 8 is fixedly connected to the carrier plate 51, and the other end of the positioning rope 8 is hooked and fixed to the enclosing plate 12 above the carrier plate 51 after surrounding the horizontal inner support. The positioning rope 8 can be a steel wire rope.
The embodiment of the application also discloses a construction process of the excavation supporting structure of the deep foundation pit of the underground passage.
The method comprises the following steps:
s1, installing an assembling unit 1 on site, inserting and embedding a bump 111 into a groove 112, then installing a first screw 2, hiding the first screw 2 by sliding a coaming 12, inserting and embedding a second screw 31 into a positioning hole 42 at the moment, screwing the second screw 31 immediately, and suspending and inserting the steel-structure column into the ground after assembling is finished;
s2, carrying out layered excavation on the foundation pit to reach a specified elevation, cleaning the assembly units 1 exposed in the foundation pit, cleaning soil in the enclosing plate 12, and carrying out next construction after the cleaning is finished;
s3, fixing the support component 5 on the assembling unit 1: the mounting strip plates 53 and the fixing strip plates 52 penetrate through the surrounding plate 12, and then the mounting strip plates 53 and the surrounding plate 12 are fixed through U-shaped bolts 54 according to the number of the mounted support assemblies 5, or the support plate 51 and the end parts of the mounting strip plates 53 positioned in the support plate 51 are fixed through the U-shaped bolts 54, and finally the support assemblies 5 are fixed;
s4, placing the inner support on the support component 5, fixedly connecting two ends of the inner support with corresponding crown beams or waist beams, and hooking and fixing the positioning rope 8 around the inner support and then with the coaming 12 above the support plate 51;
s5, when the steel structure column is dismantled, the U-shaped bolt 54, the positioning rope 8 and the first screw 2 are directly dismantled
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides an underground passage deep basal pit excavation supporting construction which characterized in that: the novel assembling device comprises upright columns (11) and enclosing plates (12), wherein the upright columns (11) are arranged in a plurality, all the upright columns (11) are arranged in parallel along the same direction, adjacent upright columns (11) are arranged on the inner walls of the enclosing plates (12) at intervals along the space formed by the enclosing plates (12), the enclosing plates (12) are connected with the outer walls of the upright columns (11) in a sliding manner, the sliding direction slides along the length direction of the upright columns (11), one ends of the upright columns (11) are fixedly provided with convex blocks (111), the other ends of the upright columns are provided with grooves (112), a plurality of upright columns (11) and one enclosing plate (12) form an assembling unit (1), the assembling unit (1) is provided with a plurality of assembling units, and the adjacent assembling units (1) are inserted and embedded and fixed end to end; the upright post (11) is provided with a first screw (2), the convex block (111) is inserted and embedded in the groove (112), and the first screw (2) penetrates through the convex block (111) and the groove (112) to be in threaded connection with the upright post (11).
2. The underground passage deep foundation pit excavation supporting structure of claim 1, characterized in that: the coaming (12) slides along the joint close to or far away from the adjacent assembling unit (1), a clamping groove (123) is formed in the coaming (12), the clamping groove (123) is formed in the length direction of the upright post (11), one end, close to the bump (111), of the clamping groove (123) penetrates through the end face of the coaming (12), an exposed nut of the first screw (2) is clamped and embedded in the clamping groove (123), and at the moment, the coaming (12) stretches across the joint of the adjacent assembling unit (1); the coaming (12) is provided with a positioning component (3), and the positioning component (3) is used for locking the position of the coaming (12) on the upright post (11) after the coaming (12) crosses the joint position of the adjacent assembling units (1).
3. The underground passage deep foundation pit excavation supporting structure of claim 2, characterized in that: the outer wall of the enclosing plate (12) is provided with a hidden groove (4) and an accommodating groove (41), the hidden groove (4) and the accommodating groove (41) are both formed along the direction perpendicular to the moving direction of the enclosing plate (12), the central lines of the hidden groove (4) and the accommodating groove (41) are collinear, and the accommodating groove (41) is located at the bottom of the hidden groove (4) and is formed with a diameter smaller than the diameter of the hidden groove (4); locating hole (42) have been seted up on stand (11), be provided with the screw thread region in locating hole (42), the screw thread region is located and is close to locating hole (42) hole bottom department, locating component (3) include second screw (31) and spring (32), spring (32) ring cover is on second screw (31) outer wall, spring (32) one end and holding tank (41) cell wall fixed connection, the other end and second screw (31) fixed connection, second screw (31) run through behind holding tank (41) with locating hole (42) threaded connection.
4. The underground passage deep foundation pit excavation supporting structure of claim 1, characterized in that: the assembling unit (1) is provided with a supporting component (5), the supporting component (5) comprises a carrier plate (51), a fixed slat (52), an installation slat (53) and a U-shaped bolt (54), one end of the fixed slat (52) is fixedly connected with the carrier plate (51), the other end of the fixed slat is hinged with the installation slat (53), and a hinged shaft is horizontally arranged; when a single supporting component (5) is fixed with the assembling unit (1), the fixed strip (52) is abutted to the top surface of the surrounding plate (12), the mounting strip (53) is abutted to the outer wall of the surrounding plate (12), and the U-shaped bolt (54) penetrates through the mounting strip (53) and the surrounding plate (12) and is detachably connected with the surrounding plate (12).
5. The underground passage deep foundation pit excavation supporting structure of claim 4, characterized in that: the carrier plate (51) is provided with a fixing hole (6), the fixing hole (6) and the fixing strip plate (52) are positioned on the same side wall of the carrier plate (51), and the fixing hole (6) is positioned right below the fixing strip plate (52); when the supporting components (5) are fixed with the assembling unit (1), the adjacent supporting components (5) are symmetrically positioned at two sides of the assembling unit (1), the end part of the mounting batten (53) penetrates through the coaming (12) and then is inserted into the right fixing hole (6), the U-shaped bolt (54) vertically penetrates through the support plate (51) and the mounting batten (53) positioned in the fixing hole (6), and the U-shaped bolt (54) is detachably connected with the support plate (51).
6. The underground passage deep foundation pit excavation supporting structure of claim 5, characterized in that: the support plate (51) is provided with a yielding hole (7), and the yielding hole (7) is formed along the direction away from the coaming (12).
7. The underground passage deep foundation pit excavation supporting structure of claim 5, characterized in that: spacing hole (124) have been seted up on bounding wall (12), and spacing hole (124) have been seted up a plurality ofly, and all spacing holes (124) are rectangular array and arrange on bounding wall (12), and fixed slat (52) run through spacing hole (124) that correspond, and after installation slat (53) and bounding wall (12) outer wall butt, U type bolt (54) run through its spacing hole (124) and installation slat (53) that correspond.
8. The underground passage deep foundation pit excavation supporting structure of claim 4, characterized in that: the support plate (51) is provided with a positioning rope (8), one end of the positioning rope (8) is fixedly connected with the support plate (51), and the other end of the positioning rope (8) is detachably connected with the coaming (12).
9. The underground passage deep foundation pit excavation supporting structure of claim 1, characterized in that: the end face of the coaming (12) close to the convex block (111) is an inclined end face, and the inclined direction is arranged downwards in an inclined manner along the direction close to the upright post (11).
10. The underground passage deep foundation pit excavation supporting structure of any one of claims 1 to 9, wherein: the construction process comprises the following steps:
s1, installing an assembling unit (1) on site, and inserting the assembled unit into the ground after assembling;
s2, excavating the foundation pit layer by layer to a specified elevation, cleaning the exposed assembly units (1), and cleaning soil in the enclosing plates (12);
s3, fixing the support component (5) on the assembling unit (1);
s4, placing the inner support on the supporting component (5), and fixedly connecting two ends of the inner support with the corresponding crown beam or waist beam;
s5, when the steel structure column is dismantled, the U-shaped bolt (54), the positioning rope (8) and the first screw (2) are directly dismantled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210988044.4A CN115288153B (en) | 2022-08-17 | 2022-08-17 | Underground passage deep foundation pit excavation supporting structure and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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