CN115288153B - 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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- CN115288153B CN115288153B CN202210988044.4A CN202210988044A CN115288153B CN 115288153 B CN115288153 B CN 115288153B CN 202210988044 A CN202210988044 A CN 202210988044A CN 115288153 B CN115288153 B CN 115288153B
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- 238000010276 construction Methods 0.000 title claims abstract description 32
- 238000009412 basement excavation Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 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 description 15
- 238000009434 installation Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000149 penetrating 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
- 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The application relates to a deep foundation pit excavation supporting structure of an underground passage and a construction process thereof, belonging to the technical field of municipal road construction, wherein the structure comprises a plurality of upright posts and coamings, wherein all the upright posts are arranged in parallel along the same direction, the adjacent upright posts are arranged at intervals on the inner wall of the coamings along the space formed by the coamings, the coamings are in sliding connection with the outer wall of the upright posts, the sliding direction slides along the length direction of the upright posts, one end of each upright post is fixedly provided with a lug, the other end of each upright post is provided with a groove, a plurality of upright posts and one coamings form an assembly unit, the assembly unit is provided with a plurality of adjacent assembly units, and the adjacent assembly units are inserted and fixed from head to tail; the first screw is arranged on the upright post, the lug is inserted in the groove, and the first screw penetrates through the lug and the groove to be in threaded connection with the upright post.
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 municipal road construction, the excavation of the underground passage requires the excavation of the foundation pit first, and the deep foundation pit means that the excavation depth exceeds 5m and contains 5m. The method is particularly important for supporting the deep foundation pit in the construction of the deep foundation pit.
The method comprises the following steps of surveying the surrounding environment and geology before deep foundation pit excavation and support, preparing before foot construction, then constructing a cement-soil mixing pile waterproof curtain, excavating in stages, sequentially excavating earthwork, plain concrete injection construction, crown beams, internal support construction, continuing earthwork excavation, continuing plain concrete injection, then internal support construction, and middle waist beam construction according to engineering.
The steel structure column is vertically inserted into the ground before the inner support construction, the steel structure column is gradually excavated along with the excavation of the foundation pit, the steel structure column is formed by welding at a construction site, and the bracket and the bearing plate are welded on the steel structure column on site when the inner support is connected with the steel structure column, so that the effect of vertical support is achieved on the inner support, the inner support process is avoided, and the sinking trend of the middle part of the inner support is resisted.
In site construction, the inventor considers that the steel structure column is welded on site according to the pre-excavation depth of the foundation pit, and the defects of low construction efficiency and long construction period exist.
Disclosure of Invention
In order to accelerate the construction of an 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.
In a first aspect, the application provides an underground passage deep foundation pit excavation supporting structure, which adopts the following technical scheme:
the utility model provides an underground passage deep basal pit excavation supporting construction, includes stand and bounding wall, and the stand is provided with a plurality ofly, and all stand along same direction parallel arrangement, and adjacent stand is along the space interval setting that the bounding wall formed on the bounding wall inner wall, bounding wall and stand outer wall sliding connection, and the slip direction is along stand length direction slip, and stand one end is fixed with the lug, and the other end has seted up flutedly, and a plurality of stands and a bounding wall form an assembly unit, and the assembly unit is provided with a plurality ofly, and adjacent assembly unit head and tail are inserted and are inlayed fixedly; the upright post is provided with a first screw, the lug is inserted in the groove, and the first screw penetrates through the lug and the groove to be in threaded connection with the upright post.
Through adopting above-mentioned technical scheme, need to throw into ground with the steel structure post that a plurality of units are assembled before the foundation ditch excavation, and a plurality of units of assembling adopt the connection mode of inserting end to inlay to fix through first screw, realized the effect of on-the-spot swift assembly, compare in on-the-spot welding, reached and saved man-hour, promoted the effect of efficiency of construction.
Optionally, the coaming slides along the junction near or far from the adjacent assembling units, a clamping groove is formed in the coaming, the clamping groove is formed in the length direction of the upright post, one end, close to the protruding block, of the clamping groove is formed through the end face of the coaming, the exposed screw cap of the first screw is clamped in the clamping groove, and at the moment, the coaming spans the junction of the adjacent assembling units; the coaming is provided with a positioning assembly, and the positioning assembly is used for locking the position of the coaming on the upright post after the coaming straddles the joint position of the adjacent assembling units.
Through adopting above-mentioned technical scheme, the existence of bounding wall not only is as one of the skeleton of steel structure post, and the mode of slip setting can also conceal first screw, and the setting of draw-in groove has played spacing effect to first screw, avoids the not hard up of first screw, and locating component's setting has played the effect of fixed bounding wall, guarantees the steel structure post to the inside in-process of inserting of ground, and the bounding wall plays concealed effect to first screw all the time.
Optionally, a hidden groove and a containing groove are formed in the outer wall of the coaming, the hidden groove and the containing groove are formed in the direction perpendicular to the moving direction of the coaming, the center lines of the hidden groove and the containing groove are collinear, and the containing groove is located at the bottom of the hidden groove and is formed with a diameter smaller than the diameter of the hidden groove; the stand is provided with a locating hole, a threaded area is arranged in the locating hole, the threaded area is located at the position close to the bottom of the locating hole, the locating component comprises a second screw and a spring, the spring is sleeved on the outer wall of the second screw, one end of the spring is fixedly connected with the groove wall of the containing groove, the other end of the spring is fixedly connected with the second screw, and the second screw penetrates through the containing groove and then is in threaded connection with the locating hole.
Through adopting above-mentioned technical scheme, after the bounding wall spanned adjacent unit handing-over department of assembling, first screw block was at the draw-in groove, and the second screw received the traction block of spring at this moment and was inlayed in the locating hole, then artifical rotation second screw, and second screw and stand formation threaded connection, the seting up of hidden groove and holding tank provides the hidden space for locating component, has guaranteed that the steel constructs the post to the smooth and easy of inserting in ground.
Optionally, the assembling unit is provided with a supporting component, the supporting component comprises a carrier plate, a fixed slat, a mounting 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 mounting slat, and a hinge shaft is horizontally arranged; when the single supporting component is fixed with the assembling unit, the fixed slat is abutted with the top surface of the coaming, the mounting slat is abutted with the outer wall of the coaming, and the U-shaped bolt penetrates through the mounting slat and the coaming and is detachably connected with the coaming.
By adopting the technical scheme, the existence of the supporting component is used for supporting the horizontal inner support in the foundation pit, so that the sinking trend of the middle part of the inner support is resisted. When the supporting component is installed, the fixing lath is lapped on the top of the coaming corresponding to the height, then the lath and the coaming can be fixedly installed through the U-shaped bolts, the horizontal internal support is lapped on the top of the carrier plate, the operation is simple and convenient, the rapid installation and the disassembly are realized, and the effect of saving man-hour is achieved.
Optionally, the carrier plate is provided with a fixing hole, the fixing hole and the fixing strip plate are positioned on the same side wall of the carrier plate, and the fixing hole is positioned right below the fixing strip plate; when a plurality of supporting components are fixed with the assembly unit, adjacent supporting components are symmetrically arranged on two sides of the assembly unit, the end parts of the installation battens penetrate through the coaming and then are inserted into the dead-facing fixing holes, the U-shaped bolts vertically penetrate through the carrier plate and the installation battens arranged in the fixing holes, and the U-shaped bolts are detachably connected with the carrier plate.
Through adopting above-mentioned technical scheme, the 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 reverse side places the cooperation and uses, reaches the effect that same component used mutually supporting, makes supporting component utilization ratio maximize.
Optionally, the carrier plate is provided with a yielding hole, and the yielding hole is arranged along a direction away from the coaming.
Through adopting above-mentioned technical scheme, support in the level in the deep basal pit in the building site adopts the steel pipe often, connects through the ring flange between the steel pipe, and when steel pipe steel was at the carrier plate top, the hole of stepping down provided the space of stepping down for the faraday dish of adjacent steel pipe tip, guaranteed that the steel pipe outer wall can the butt at the carrier plate top.
Optionally, the bounding wall is last to have seted up spacing hole, and a plurality of have been seted up to spacing hole, and all spacing holes are rectangular array on the bounding wall and arrange, and fixed slat runs through corresponding spacing hole, and after installation slat and bounding wall outer wall butt, U type bolt runs through its spacing hole and installation slat that corresponds.
Through adopting above-mentioned technical scheme, no matter supporting component is single fixed with the bounding wall, or a plurality of supporting components are fixed with the bounding wall simultaneously, all insert and inlay in the spacing downthehole that corresponds, increased the connection effect of supporting component and bounding wall, promoted the stability after the supporting component installation.
Optionally, the support plate is provided with a positioning rope, one end of the positioning rope is fixedly connected with the support plate, and the other end of the positioning rope is detachably connected with the coaming.
Through adopting above-mentioned technical scheme, setting up of locating rope not only can play the effect of hanging the support to the support plate, and the support then is fixed with the bounding wall hook again in the locating rope loop once, can also play spacing effect to the internal support.
Optionally, the end face of the coaming close to the lug is an inclined end face, and the inclined direction is arranged downwards in an inclined manner 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 the earth, and when being convenient for steel structure post to the ground interpolation was inlayed, the more smooth and easy of inlaying.
In a second aspect, the application provides a construction process of 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, installing an assembly unit on site, and inserting the assembly unit into the ground after the assembly is completed;
s2, excavating the foundation pit layer by layer to a specified elevation, cleaning the exposed assembly units, and cleaning soil in the coaming;
s3, fixing the support assembly on the assembling unit;
s4, placing the inner support on the support assembly, and fixedly connecting two ends of the inner support with corresponding crown beams or waist beams;
s5, directly dismantling the U-shaped bolt, the positioning rope and the first screw when the steel structure column is dismantled.
Through adopting above-mentioned technical scheme, adopt the mode of field mechanical assembly, compare in field welding more can save time, and the supporting component also adopts the mode of field mechanical assembly with assembling the unit, is convenient for carry out the support of vertical direction to the support middle part in the foundation ditch, wholly adopts the mode of mechanical assembly also be convenient for follow-up dismantlement.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the selection of the assembling units saves the installation time of the steel structure column, and meanwhile, the sliding arrangement of the coaming plays a role in limiting and protecting the first screw;
2. the arrangement of the supporting component is matched with the coaming, so that the front side and the back side of the supporting component can be used and matched with each other, and the utilization rate of the supporting component is maximized;
3. the function of locating rope not only plays the effect of hanging the support to the carrier plate but also plays spacing effect to the horizontal internal support in the foundation ditch.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present application;
FIG. 2 is a schematic view of a single splice unit construction;
FIG. 3 is a cross-sectional view of adjacent splice units after they have been spliced;
FIG. 4 is a partial schematic view showing the individual support assemblies after they are secured to the splice unit;
FIG. 5 is a partial schematic view of two symmetrically disposed support assemblies secured to an assembled unit;
FIG. 6 is a state diagram highlighting the use of two support members in a positive and negative engagement.
Reference numerals illustrate: 1. assembling units; 11. a column; 111. a bump; 112. a groove; 12. coaming plate; 121. a slide block; 122. a slideway; 123. a clamping groove; 124. a limiting hole; 2. a first screw; 3. a positioning assembly; 31. a second screw; 32. a spring; 4. a hidden groove; 41. a receiving groove; 42. positioning holes; 5. a support assembly; 51. a carrier plate; 52. fixing the lath; 53. mounting a slat; 54. u-shaped bolts; 6. a fixing hole; 7. a relief hole; 8. and (5) positioning the rope.
Detailed Description
The application is described in further detail below with reference to fig. 1-6.
The embodiment of the application discloses an underground passage deep foundation pit excavation supporting structure.
Referring to fig. 1, an underground passage deep foundation pit excavation supporting structure comprises an assembling unit 1 and a supporting component 5, wherein the assembling unit 1 is provided with a plurality of assembling units, and the adjacent assembling units 1 are detachably connected end to end, so that complete steel structure columns are assembled, the supporting component 5 is detachably connected with the assembling units 1, the supporting component 5 is used for bearing the horizontal internal support in a foundation pit, resisting the trend of falling down in the middle part of the horizontal internal support in the foundation pit, integrally adopting an assembling type, and the structure is simple and convenient to operate, and achieves the effect of saving the construction period.
Referring to fig. 1 and 2, the assembly unit 1 includes a plurality of columns 11 and coamings 12, the columns 11 are provided in plural and all are provided in the same direction, four columns 11 are provided in a single assembly unit 1 in this embodiment, and the coamings 12 are rectangular frame-like coamings 12. The upright posts 11 are positioned on the inner wall of the coaming 12 and positioned at four corners of a rectangular frame surrounded by the coaming 12, the upright posts 11 are provided with slide ways 122, sliding blocks 121 are fixed at corresponding positions on the inner wall of the coaming 12, and the sliding blocks 121 slide in the slide ways 122, namely the coaming 12 slides along the length direction of the upright posts 11.
Referring to fig. 2 and 3, a groove 112 is formed at one end of the upright 11, a bump 111 is fixed at the other end, when the adjacent splicing units 1 are connected end to end, the bump 111 of the adjacent upright 11 is inserted into the groove 112 of the corresponding upright 11, a first screw 2 is arranged on the upright 11, the first screw 2 penetrates through the groove 112 and the bump 111 positioned in the groove 112, and the first screw 2 is in threaded connection with the upright 11.
Referring to fig. 2 and 3, the upright 11 is vertically downward, the end face of the bottom end of the coaming 12 is an inclined end face, and the inclined direction is arranged obliquely downward in the direction approaching the upright 11. The draw-in groove 123 has been seted up on the bounding wall 12 inner wall, and draw-in groove 123 is offered along stand 11 length direction, and the end that draw-in groove 123 is close to bounding wall 12 slope terminal surface opens bounding wall 12 terminal surface thoroughly, slides bounding wall 12 along stand 11 length direction, and the nut of first screw 2 is blocked and is inlayed in draw-in groove 123, and bounding wall 12 spanes adjacent assembly unit 1 handing-over department.
Referring to fig. 2 and 3, the coaming 12 is provided with a positioning assembly 3, the positioning assembly 3 comprising a second screw 31 and a spring 32, the positioning assembly 3 locking the coaming 12 to the position of the upright 11. The enclosing plate 12 is provided with a hidden groove 4 and a containing groove 41, the hidden groove 4 and the containing groove 41 are all arranged along the direction of the vertical column 11, the containing groove 41 is positioned at the bottom of the hidden groove 4, the diameter of the containing groove 41 is smaller than that of the hidden groove 4, a spring 32 is sleeved on the outer wall of a second screw 31 in a ring mode, one end of the spring 32 is fixedly connected with the wall of the containing groove 41, the other end of the spring is fixedly connected with the second screw 31, a positioning hole 42 is arranged on the vertical column 11, the positioning hole 42 is arranged along the direction of the vertical column 11, the center lines of the positioning hole 42, the containing groove 41 and the hidden groove 4 are collinear, a nut of the second screw 31 is contained in the hidden groove 4, the tip of the second screw 31 penetrates through the bottom of the containing groove 41 and is inserted into the positioning hole 42, a threaded area is arranged at the bottom of the positioning hole 42, and the second screw 31 is in threaded connection with the positioning hole 42.
Referring to fig. 4, the coaming 12 is provided with a plurality of limiting holes 124, and adjacent limiting holes 124 on a single side wall of the coaming 12 are distributed in a rectangular array, and in the embodiment of the application, four limiting holes 124 on a single side wall of the coaming 12 are distributed. The support assembly 5 comprises a carrier plate 51, a fixed slat 52, a mounting 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 52 is hinged with the mounting slat 53, and the hinge shaft is horizontally arranged. When the single support assembly 5 is fixed to the splicing unit 1, there are two fixing modes, the first: the fixing lath 52 is lapped on the top of the coaming 12, the installation lath 53 is abutted with the vertical outer wall of the coaming 12, the U-shaped bolt 54 penetrates through the installation lath 53 and the corresponding limiting hole 124 on the coaming 12, the U-shaped bolt fixes the installation lath 53 and the coaming 12, and the top of the carrier plate 51 is abutted with the horizontal inner support in the foundation pit; second kind: because the limiting holes 124 on the coaming 12 are in two rows, the fixing lath 52 is opposite to the limiting holes 124 in the upper row and penetrates through the limiting holes 124, then the mounting lath 53 is abutted with the outer wall of the coaming 12, and the U-shaped bolts 54 penetrate through the mounting lath 53 and the corresponding limiting holes 124 in the lower row of the coaming 12.
Referring to fig. 5 and 6, a fixing hole 6 and a yielding hole 7 are formed in a carrier plate 51, the fixing hole 6 and a fixing slat 52 are located on the same vertical side wall of the carrier plate 51, the fixing hole 6 is formed along the length direction of the fixing slat 52, the fixing hole 6 is located under the fixing slat 52, and the fixing holes 6 are formed corresponding to the number of the fixing slats 52; 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 on the same vertical height, the supporting components 5 on one side are normally placed, the supporting components on the other side are turned 180 degrees and then used, the end parts of the mounting laths 53 in the two supporting components 5 are inserted into the fixing holes 6 of the other side, the fixing laths 52 penetrate through the limiting holes 124, the U-shaped bolts 54 vertically penetrate through the carrier plate 51 and the mounting laths 53 located in the fixing holes 6, and the U-shaped bolts 54 fix the carrier plate 51 and the end parts of the mounting laths 53 located in the carrier plate 51. The hole 7 of stepping down is offered along fixed slat 52 length direction, and the end that the hole 7 of stepping down kept away from stand 11 opens the vertical terminal surface of penetrating carrier plate 51, and the horizontal internal support in the foundation ditch is accepted to carrier plate 51 top surface, and interior support building site adopts pipe welding and flange joint to become, and the hole 7 of stepping down is offered and is placed the space for the placement of ring flange.
Referring to fig. 5, a positioning rope 8 is arranged on a carrier plate 51, one end of the positioning rope 8 is fixedly connected with the carrier plate 51, and the other end of the positioning rope is hooked and fixed with a coaming 12 above the carrier plate 51 after encircling a horizontal internal support. The positioning rope 8 can be a steel wire rope.
The embodiment of the application also discloses a construction process of the deep foundation pit excavation supporting structure of the underground passage.
The method comprises the following steps:
s1, installing an assembly unit 1 on site, inserting a convex block 111 into a groove 112, installing a first screw 2, hiding the first screw 2 by a sliding coaming 12, inserting 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 the assembly is completed;
s2, excavating the foundation pit in layers, excavating to a specified elevation, cleaning the assembly units 1 exposed in the foundation pit, cleaning soil in the coaming 12, and performing the next construction after the cleaning is finished;
s3, fixing the support component 5 on the assembling unit 1: the mounting lath 53 and the fixing lath 52 penetrate through the coaming 12, then the mounting lath 53 and the coaming 12 are fixed through the U-shaped bolt 54 according to the number of the mounting of the supporting component 5, or the carrier plate 51 and the end part of the mounting lath 53 positioned in the carrier plate 51 are fixed through the U-shaped bolt 54, and finally the fixing of the supporting component 5 is realized;
s4, placing the inner support on the support assembly 5, fixedly connecting two ends of the inner support with corresponding crown beams or waist beams, and hooking and fixing the positioning ropes 8 around the inner support and then with the coaming 12 above the carrier plate 51;
s5, directly dismantling the U-shaped bolt 54, the positioning rope 8 and the first screw 2 when the steel structure column is dismantled
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (9)
1. The utility model provides a basement deep basal pit excavation supporting construction which characterized in that: the novel combined type splicing unit comprises a plurality of upright posts (11) and coamings (12), wherein the upright posts (11) are arranged in parallel along the same direction, the adjacent upright posts (11) are arranged on the inner wall of the coaming (12) at intervals along the space formed by the coamings (12), the coamings (12) are in sliding connection with the outer wall of the upright posts (11), the sliding direction slides along the length direction of the upright posts (11), one end of each upright post (11) is fixedly provided with a convex block (111), the other end of each upright post is provided with a groove (112), the upright posts (11) and one coaming (12) form one splicing unit (1), the splicing units (1) are arranged in a plurality, and the adjacent splicing units (1) are fixedly inserted from head to tail; the upright post (11) is provided with a first screw (2), the convex block (111) is inserted into 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); the assembly unit (1) is provided with a support assembly (5), the support assembly (5) comprises a carrier plate (51), a fixed slat (52), a mounting 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 mounting slat (53), and a hinge shaft is horizontally arranged; when the single supporting component (5) is fixed with the assembling unit (1), the fixed slat (52) is abutted with the top surface of the coaming (12), the mounting slat (53) is abutted with the outer wall of the coaming (12), and the U-shaped bolt (54) penetrates through the mounting slat (53) and the coaming (12) and is detachably connected with the coaming (12).
2. The underground passage deep foundation pit excavation supporting structure of claim 1, wherein: the coaming (12) slides along the junction near or far from the adjacent splicing units (1), the coaming (12) is provided with a clamping groove (123), the clamping groove (123) is formed along the length direction of the upright post (11), one end, close to the protruding block (111), of the clamping groove (123) is provided with an end face of the coaming (12), the exposed screw cap of the first screw (2) is clamped in the clamping groove (123), and at the moment, the coaming (12) spans the junction of the adjacent splicing units (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) straddles the joint position of the adjacent assembling units (1).
3. The underground passage deep foundation pit excavation supporting structure of claim 2, wherein: the outer wall of the coaming (12) is provided with a hidden groove (4) and a containing groove (41), the hidden groove (4) and the containing groove (41) are respectively arranged along the direction perpendicular to the moving direction of the coaming (12), the center lines of the hidden groove (4) and the containing groove (41) are collinear, and the containing groove (41) is positioned at the bottom of the hidden groove (4) and is provided with a diameter smaller than the diameter of the hidden groove (4); set up locating hole (42) on stand (11), be provided with the screw thread region in locating hole (42), screw thread region is located near locating hole (42) hole bottom department, locating component (3) are including 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, wherein: the support plate (51) is provided with a fixing hole (6), the fixing hole (6) and the fixing slat (52) are positioned on the same side wall of the support plate (51), and the fixing hole (6) is positioned under the fixing slat (52); when a plurality of supporting components (5) are fixed with the assembling unit (1), the adjacent supporting components (5) are symmetrically arranged on two sides of the assembling unit (1), the end parts of the mounting laths (53) penetrate through the coaming (12) and then are inserted into the dead-facing fixing holes (6), the U-shaped bolts (54) vertically penetrate through the carrier plate (51) and the mounting laths (53) arranged in the fixing holes (6), and the U-shaped bolts (54) are detachably connected with the carrier plate (51).
5. The underground passage deep foundation pit excavation supporting structure of claim 4, wherein: and the carrier plate (51) is provided with a yielding hole (7), and the yielding hole (7) is arranged along the direction away from the coaming plate (12).
6. The underground passage deep foundation pit excavation supporting structure of claim 4, wherein: limiting holes (124) are formed in the surrounding plate (12), the limiting holes (124) are formed in a plurality of mode, all the limiting holes (124) are distributed on the surrounding plate (12) in a rectangular array mode, the fixing battens (52) penetrate through the corresponding limiting holes (124), and after the mounting battens (53) are abutted to the outer wall of the surrounding plate (12), the U-shaped bolts (54) penetrate through the corresponding limiting holes (124) and the mounting battens (53).
7. The underground passage deep foundation pit excavation supporting structure of claim 1, wherein: 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 is detachably connected with the coaming (12).
8. The underground passage deep foundation pit excavation supporting structure of claim 1, wherein: the end face, close to the lug (111), of the coaming (12) is an inclined end face, and the inclined direction is obliquely downwards arranged along the direction close to the upright post (11).
9. The underground passage deep foundation pit excavation supporting structure of claim 7, wherein: the construction process comprises the following steps:
s1, installing an assembly unit (1) on site, and inserting the assembly unit into the ground after assembly;
s2, excavating the foundation pit layer by layer to a specified elevation, cleaning the exposed assembly units (1), and cleaning soil in the coaming (12);
s3, fixing the support component (5) on the assembling unit (1); when the single supporting component (5) is fixed with the assembling unit (1), the fixed slat (52) is abutted with the top surface of the coaming (12), the mounting slat (53) is abutted with the outer wall of the coaming (12), and the U-shaped bolt (54) penetrates through the mounting slat (53) and the coaming (12) and is detachably connected with the coaming (12);
s4, placing the inner support on the support component (5), and fixedly connecting two ends of the inner support with corresponding crown beams or waist beams;
s5, directly dismantling the U-shaped bolt (54), the positioning rope (8) and the first screw (2) when the steel structure column is 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 |
|---|---|---|---|
| CN202210988044.4A CN115288153B (en) | 2022-08-17 | 2022-08-17 | Underground passage deep foundation pit excavation supporting structure and construction process thereof |
Publications (2)
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