CN113338305A - Internal support structure for underground structure and construction method thereof - Google Patents
Internal support structure for underground structure and construction method thereof Download PDFInfo
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- CN113338305A CN113338305A CN202110744327.XA CN202110744327A CN113338305A CN 113338305 A CN113338305 A CN 113338305A CN 202110744327 A CN202110744327 A CN 202110744327A CN 113338305 A CN113338305 A CN 113338305A
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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Abstract
The application relates to an internal support structure for an underground structure and a construction method thereof, wherein the internal support structure comprises a support column, an internal support structure and a support plate, the internal support structure comprises a support frame arranged on the support column in a penetrating manner, and a first support block used for supporting the support frame is movably arranged on the support column in a penetrating manner; the support frame is characterized by further comprising a second support block, the second support block is movably embedded into the inner side of the foundation pit, the support plate is placed at the top of the support frame, support holes are formed in the support plate, and the support holes are used for building wall columns. The underground structure building method has the advantages that the production of building garbage can be reduced in the process of underground structure building, so that the effects of reducing cost, saving energy and protecting environment can be achieved.
Description
Technical Field
The application relates to the technical field of underground building structures, in particular to an inner support structure for an underground structure and a construction method thereof.
Background
When building multilayer basement building, need set up underground continuous wall at building range edge earlier, carry out the construction of support column in the foundation ditch, then carry out digging out of foundation ditch soil in underground continuous wall inboard, dig out one deck soil earlier, set up the inside internal stay structure of one deck again, dig one deck soil down toward the foundation ditch again, set up the inside internal stay structure of one deck again, until the required underground layer number of piles of construction to reduce the condition that the foundation ditch collapses.
And building the bottommost structure of the basement at the bottom of the foundation pit, dismantling the corresponding internal bracing structure after the strength of the basement structure meets the requirement, and building the basement structure on the previous layer until the construction of the basement is completed.
The internal bracing structure is generally made of reinforced concrete, and when the internal bracing structure is dismantled, the internal bracing structure is dismantled in sections by adopting a rope saw cutting mode so as to be convenient for moving out of the foundation pit.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: when an internal bracing structure is built, more construction waste is generated, and further improvement is needed.
Disclosure of Invention
In order to reduce the generation of construction waste and achieve the effects of energy conservation and environmental protection, the application provides an inner support structure for an underground structure and a construction method thereof.
The application provides an inner support structure for an underground structure and a construction method thereof, which adopt the following technical scheme:
an inner supporting structure for an underground structure comprises a supporting column, an inner supporting structure and a supporting plate, wherein the inner supporting structure comprises a supporting frame arranged on the supporting column in a penetrating mode, and a first supporting block used for supporting the supporting frame is movably arranged on the supporting column in a penetrating mode; the support frame is characterized by further comprising a second support block, the second support block is movably embedded into the inner side of the foundation pit, the support plate is placed at the top of the support frame, support holes are formed in the support plate, and the support holes are used for building wall columns.
Through adopting above-mentioned technical scheme, erection bracing post, backup pad, support frame, first supporting shoe and second supporting shoe can be dismantled with the support column and be connected to can not destroy interior bearing structure when building underground structure, with the interior bearing structure of cyclic utilization, can reduce the interior bearing structure of foundation ditch internal construction concrete and produce the condition of more building rubbish when demolising, thereby can reach energy-concerving and environment-protective effect.
Optionally, the support column includes bottom pillar, environmental protection post, the fusion post and the threaded rod of embedding in the foundation ditch bottom, the bottom pillar top is connected with the environmental protection post, the environmental protection post is kept away from bottom pillar one end and is fused the post and be connected, be connected through the threaded rod between bottom pillar, environmental protection post and the fusion post.
Through adopting above-mentioned technical scheme, the erection foundation, the environmental protection post, fuse post and threaded rod, when digging continuously and establishing the soil in the foundation ditch, the foundation imbeds in the building structure of lower floor to firm bottom building structure, fuse post and building structure mutually, thereby can improve building structure's intensity, the environmental protection post accessible is screwed out the threaded rod and is dismantled after digging the soil of establishing in the foundation ditch, with cyclic utilization, thereby further reduce building rubbish's production.
Optionally, the support column is including a foundation and a plurality of combination that combines by environmental protection post and fusion post, the foundation adopts concrete reinforcement material to make, environmental protection post and fusion post adopt steel material to make.
Through adopting above-mentioned technical scheme, set up a foundation column and a plurality of by the combination of environmental protection post with fuse the butt joint of post, the foundation column sets up in the foundation ditch bottommost, can support the structure of underground structure bottommost, make underground structure more firm, the environmental protection post is installed on the clearance between the building structure layer, it installs in the building structure layer to fuse the post, therefore, the environmental protection post is corresponding with the quantity that fuses the post, and the foundation column adopts concrete reinforcement material to make, environmental protection post and fuse the post and adopt steel material to make, can effectually reduce the cost of manufacture of support column, improve the intensity of environmental protection post, can better reach the effect of support, can ensure the smooth construction of underground structure better.
Optionally, the support frame includes that the ring is buckled, slider and connecting strip, the slider slides around ring knot center line circumference and sets up in the outside that the ring was buckled, the slider rotates with the connecting strip to be connected, first supporting shoe both ends are detained with the ring and are inconsistent, second supporting shoe one end embedding is on the foundation ditch lateral wall, and the slider one end is kept away from to the top of the other end and connecting strip inconsistent.
Through adopting above-mentioned technical scheme, installation ring is detained, slider and connecting strip, can be according to the different shapes of foundation ditch, the position of adjustment slider changes the connecting strip of different length to can the support of the foundation ditch of different shapes of adaptation, improve support frame suitability, thereby reach the effect that improves the support frame utilization ratio, simultaneously, the constructor that can also be convenient for installs and dismantle the support frame, improves construction speed, shortens construction cycle.
Optionally, a rotating shaft is installed on the sliding block, lantern rings are sleeved on two sides of the rotating shaft, two circular rings formed by the lantern rings are sleeved on the rotating shaft, and the connecting strip and the two sets of rings are fixed through bolts.
Through adopting above-mentioned technical scheme, installation pivot, lantern ring and bolt can adjust the relative position that connecting strip and ring detained and the angle of putting, make the locating position of connecting strip more nimble to the foundation ditch structure of the more different shapes of adaptation can also avoid the supported hole in the backup pad in a flexible way, thereby can conveniently design the position of supported hole in the backup pad more, with the construction of cooperation building structure.
Optionally, a sliding groove with a T-shaped cross section is formed in the outer side of the ring buckle, the two sliding blocks are fixed at two ends of the rotating shaft, and the two lantern rings are sleeved between the two sliding blocks on the same rotating shaft.
Through adopting above-mentioned technical scheme, set up the spout, the pivot both ends set up the slider, can improve the sliding stability of slider, guarantee the support nature of slider, can also be convenient for install and dismantle the lantern ring, be convenient for adjust the position of the lantern ring in order to adjust the angle of connecting strip to can adapt different foundation ditch shape and support mode, with the suitability that improves the support frame, improve the rate of utilization, make the best of things, thereby can reduce the waste, reach energy-concerving and environment-protective effect.
Optionally, the top surface of the supporting plate and the side walls of the supporting holes are coated with cement demolding layers, the supporting frame is made of steel materials, and the supporting plate is a microporous calcium silicate plate.
By adopting the technical scheme, the cement demoulding layer is installed, the support plate adopts the microporous calcium silicate plate, the support frame is made of steel materials, the compressive strength of the microporous calcium silicate plate is high, the durability is good, the support frame adopting the steel materials supports the support plate of the microporous calcium silicate plate, when cement is laid on the support plate to build a building structure, the deformation of the support plate can be reduced, the quality of the building structure is improved, the surface pores of the microporous calcium silicate are large, the cement demoulding agent is easily bonded with the microporous calcium silicate, the cement demoulding layer is more firmly arranged on the surface of the support plate, the cement demoulding layer can better play a role, the support plate can more easily fall off from the building structure, the working efficiency of workers is improved, and the construction period is shortened.
Optionally, the supporting plate is provided with a plurality of blocks, and the bottom edge of the supporting plate is provided with an arc chamfer.
Through adopting above-mentioned technical scheme, set up backup pad and circular arc chamfer, can be convenient for remove the backup pad along the foundation ditch degree of depth, also can be convenient for after building structure construction accomplishes, pull down the backup pad and transport away from the foundation ditch, reduce the degree of difficulty of backup pad transportation.
Optionally, a pressing block is installed at the bottom of one end, away from the side wall of the foundation pit, of the second supporting block, and when the second supporting block is partially embedded into the side wall of the foundation pit, one side of the pressing block presses against the side wall of the foundation pit.
Through adopting above-mentioned technical scheme, set up the briquetting, the briquetting supports and presses on the foundation ditch lateral wall to can improve the support ability of second supporting shoe, under the circumstances of increaseing with foundation ditch lateral wall support area, reduce the damaged condition to the foundation ditch lateral wall, thereby the backup pad that can be better is supporting, reduces the deformation condition of backup pad, improves building structure's quality.
The application also provides a construction method adopting the internal support structure for the underground structure, which adopts the following technical scheme:
a method of constructing an internal support structure for an underground structure, comprising:
step 1: constructing an underground continuous wall at the periphery of the construction foundation pit;
step 2: arranging a plurality of jet grouting piles at joints of the underground continuous wall to form a fully-closed waterproof curtain surrounding the foundation pit;
and step 3: the construction of basement structure is carried out in the underground continuous wall,
characterized in that the step 3 comprises:
step 3.1: digging a foundation layer in the foundation pit, constructing a crown beam at the top of the underground continuous wall, installing a support column at the bottom of the foundation layer, wherein the bottom depth of the support column is 4-5m greater than the preset bottom depth of the foundation pit, installing an internal support structure at the bottom of the foundation layer, and installing the internal support structure on the support column;
step 3.2: laying a support plate on the internal bracing structure, and constructing a first-layer building structure on the support plate, wherein a plurality of first soil outlets are reserved in the first-layer building structure;
step 3.3: when the strength of the first-layer building structure reaches 100%, digging a first-layer structural layer in the foundation pit, conveying the dug soil out of the foundation pit from a first soil outlet by means of a conveying tool, and building a first wall column for supporting the first-layer building structure through a supporting hole;
step 3.4: detaching the inner supporting structure and the supporting plate, moving to the bottom of the first-layer structural layer, installing, and then building a second-layer building structure on the supporting plate, wherein a plurality of second soil outlets are reserved in the second-layer building structure;
step 3.5: when the strength of the second-layer building structure reaches 100%, digging a second-layer structure layer in the foundation pit, conveying the dug soil out of the foundation pit from a second soil outlet and a first soil outlet by means of a conveying tool, and building a second wall column for supporting the second-layer building structure at the bottom of the internal bracing structure;
step 3.6: repeating the steps until the number of the building structure layers reaches the preset requirement, pouring a basement bottom plate at the bottom of the last structural layer, forming a complete underground structure by the basement bottom plate and the underground continuous wall, and detaching the inner support structure, the support plate and the support column and cleaning and storing the inner support structure, the support plate and the support column when the strength of the basement bottom plate reaches 100% for next use.
Through adopting the above technical scheme, through removing interior bearing structure, can be when setting up the multilayer underground structure, also can use same interior bearing structure, thereby reduce the quantity that interior bearing mechanism built, and simultaneously, interior bearing structure can also be used for building the building structure, just can build a building structure in the fixed position of interior bearing structure, reduce the bearing structure of building structure of rebuilding in addition, can simplify workman's construction steps, improve the efficiency of construction, and can reduce building material's use, in addition, interior bearing structure can recycle in other different foundation ditches, therefore, the construction of interior bearing structure in the concrete and the produced building rubbish can be reduced, therefore, can reach energy-concerving and environment-protective effect.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the construction method has the advantages that the construction structure is built on the inner supporting structure one by digging a structural layer, the inner supporting structure is arranged, and the underground structure is built one by circularly digging the structural layer towards the bottom of the foundation pit, moving the inner supporting structure and building the construction structure, so that the installation quantity of the inner supporting structure can be reduced, and the additional arrangement of the supporting structure of the construction structure can be reduced, thereby simplifying the construction process, reducing the generation of construction waste and improving the construction efficiency;
2. through erection bracing frame, first supporting shoe, second supporting shoe, support column and backup pad, and all can dismantle the setting, can support the inside structure of foundation ditch, reduce the time that bearing structure construction took and produced building rubbish in the concrete, simultaneously, also can build building structure in the backup pad, simplify the construction flow, improve the efficiency of construction.
Drawings
Fig. 1 is a schematic structural diagram of an integral internal bracing structure in an embodiment of the present application.
Fig. 2 is an exploded schematic view of an inner support structure in the embodiment of the present application.
Fig. 3 is an exploded structural schematic view of the support frame in the embodiment of the present application.
Fig. 4 is a schematic view of a foundation pit state after step 3.2 is completed in the embodiment of the present application.
Fig. 5 is a schematic view of a foundation pit state after step 3.3 is completed in the embodiment of the present application.
Fig. 6 is a schematic view of a foundation pit state after step 3.4 is completed in the embodiment of the present application.
Fig. 7 is a schematic view of a foundation pit state after step 3.5 is completed in the embodiment of the present application.
Fig. 8 is a schematic view of a foundation pit state after step 3.6 is completed in the embodiment of the present application.
Description of reference numerals:
1. an inner support structure; 10. an underground diaphragm wall; 11. a crown beam; 2. a support pillar; 20. a bottom pillar; 21. an environmental protection column; 22. a fusion column; 23. a threaded rod; 3. a support plate; 30. a support hole; 4. a support frame; 40. a circular ring is buckled; 41. a slider; 410. a rotating shaft; 411. a collar; 412. a bolt; 413. a chute; 42. a connecting strip; 5. a first support block; 6. a second support block; 60. a pressing block; 7. a first floor of building structure; 70. a first soil outlet; 71. a first wall stud; 8. a second floor building structure; 80. a second soil outlet; 81. a second wall stud; 9. basement bottom plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The embodiment of the application discloses an inner support structure for an underground structure.
Referring to fig. 1, the inner supporting structure for the underground structure includes an inner supporting structure 1, a supporting column 2 and a supporting plate 3, the supporting column 2 is installed in a foundation pit and supports the inner supporting structure 1 and the supporting plate 3, and both the inner supporting structure 1 and the supporting plate 3 are horizontally installed on the supporting column 2.
In this embodiment, the internal support structure 1 includes the support frame 4, all wears to be equipped with a support frame 4 on each support column 2, and the support frame 4 can slide along the length direction of support column 2, wears to be equipped with first supporting block 5 on support column 2, and support column 2 is passed in the activity of the both ends of first supporting block 5, and the top position at 5 both ends of first supporting block is inconsistent with support frame 4 to can make support column 2 support frame 4.
In this embodiment, the second supporting block 6 is embedded in the side wall of the foundation pit, one end of the second supporting block 6 is movably embedded in the side wall of the foundation pit, the other end of the second supporting block extends out of a preset part of the side wall of the foundation pit, and the top of the part of the side wall of the foundation pit, which extends out of the second supporting block 6, is abutted to the supporting frame 4, so that the supporting frame 4 can be further supported, and the supporting strength of the supporting frame 4 is improved.
In this embodiment, backup pad 3 is placed at 4 tops of support frame to make support frame 4 can support backup pad 3, seted up brace hole 30 in backup pad 3, so that pass backup pad 3, building support structure is being under the building structure bottom construction in backup pad 3, thereby can reach earlier building support structure, support building structure, dismantle backup pad 3 and support frame 4's effect again, then can improve building structure's security of building structure construction.
In this embodiment, the both ends of first supporting block 5 all are provided with the pull ring, generally use traction tool with the workman to take out first supporting block 5, and simultaneously, the arc surface in the outside of pull ring also can be convenient for the workman with first supporting block 5 embedding on support column 2 to improve workman's work efficiency.
In this embodiment, a pull ring is also arranged on one side of the second supporting block 6 away from the foundation pit, a pressing block 60 is arranged at the bottom of one side of the second supporting block 6 away from the foundation pit, and one side of the pressing block 60 close to the foundation pit is pressed on the side wall of the foundation pit, so that the supporting strength of the second supporting block 6 can be improved.
Referring to fig. 2, in this embodiment, the supporting column 2 includes a bottom column 20, an environmental protection column 21 and a fusion column 22 detachably connected in sequence, outer diameters of the bottom column 20, the environmental protection column 21 and the fusion column 22 are the same, a central line of the cylinder is located on the same vertical line, threaded holes penetrate through the middle portions of the bottom column 20, the environmental protection column 21 and the fusion column 22 along the length direction, the bottom column 20, the environmental protection column 21 and the fusion column 22 are connected through a threaded rod 23 penetrating through the middle portions of the bottom column 20, the environmental protection column 21 and the fusion column 22, wherein the number of the bottom column 20, the environmental protection column 21 and the fusion column 22 is determined according to the number of underground structural layers.
The support column 2 comprises a bottom column 20 and a plurality of assemblies butted by an environment-friendly column 21 and a fusion column 22, when an N-layer underground structure is arranged, a bottom column 20, an environment-friendly column 21 and a fusion column 22 are sequentially arranged on a threaded rod 23 in a penetrating mode, then N-1 environment-friendly columns 21 and fusion columns 22 are sequentially arranged in a penetrating mode, for example, three-layer underground structures-F, -2F and-3F (bottom layers) are to be built, and the bottom column 20, the environment-friendly column 21, the fusion column 22, the environment-friendly column 21 and the fusion column 22 are sequentially arranged on the threaded rod 23 in a penetrating mode.
In the present embodiment, the lengths of the eco-pillars 21 arranged from the bottom of the foundation pit to the top of the threaded rod 23 are sequentially the same as the heights of the gaps between the corresponding building structure layers, and the lengths of the fusion pillars 22 arranged from the bottom of the foundation pit to the top of the threaded rod 23 are sequentially the same as the heights of the corresponding building structure layers.
When the underground structure is built, the bottom column 20 is arranged at the bottommost part of the underground structure, the whole underground structure is supported, the fusion column 2 is combined with the corresponding building structure layer to reinforce the strength of the building structure layer 1, the environment-friendly column 21 is arranged between the building structure layers, the environment-friendly column 21 can be separated from the adjacent structure by detaching the threaded rod 23, and the environment-friendly column 21 is detached for recycling.
In this embodiment, the bottom pillar is made of a concrete reinforcement material, and can be better combined with an underground structure, and the environmental protection pillar 21 and the fusion pillar 22 are made of steel materials, so that the use strength of the environmental protection pillar 21 and the fusion pillar 22 can be improved, and the recyclable performance of the environmental protection pillar 21 can be guaranteed.
After underground building structure tentatively accomplished, both basement bottom plate 9's intensity reached 100% back, threaded rod 23 is screwed out to the accessible, environmental protection post 21 unsettled between building structure is pulled down, and fill the screw hole that threaded rod 23 screwed out, so that cyclic use environmental protection post 21 and threaded rod 23, foundation pillar 20 is worn to establish in the foundation ditch bottom and is supporting basement bottom plate 9, it then bonds with building structure mutually to fuse post 22, in order to improve building structure's intensity, can also reduce building rubbish's production, reach energy-concerving and environment-protective effect.
Referring to fig. 3, in the present embodiment, the supporting frame 4 includes a circular ring fastener 40, a sliding block 41 and a connecting strip 42, the supporting column 2 is inserted into the middle position of the circular ring fastener 40, two ends of the first supporting block 5 are abutted against the bottom of the circular ring fastener 40, and the top of the end of the second supporting block 6 far away from the side wall of the foundation pit is abutted against the bottom of the end of the connecting strip 42 far away from the circular ring fastener 40.
The ring buckle 40 is cylindrical and has a sliding groove 413 at the outer side, two ends of the sliding groove 413 are connected to form a ring groove, the cross section of the sliding groove 413 is T-shaped, the sliding blocks 41 slide in the sliding groove 413, each sliding groove 413 is provided with a plurality of sliding blocks 41, in this embodiment, eight sliding blocks 41 are installed and arranged in two groups, and the sliding blocks 41 respectively and correspondingly slide at two sides of the sliding groove 413, namely, near the top and the bottom of the ring buckle 40.
The rotating shaft 410 is installed between each set of sliding blocks 41, the length direction of the rotating shaft 410 is parallel to the length direction of the circular ring buckle, and the height of the rotating shaft 410 is the same as the opening width of the sliding groove 413, so that the sliding blocks 41 can slide in the sliding groove 413 more stably.
In this embodiment, the rotating shaft 410 is sleeved with a collar 411, the collar 411 is provided with a semicircular groove, a diameter of a circular hole formed by combining the semicircular grooves of the two collars 411 is slightly larger than a diameter of the rotating shaft 410, a space factor is equal to the diameter of the circular hole of the rotating shaft 410, and the space factor is preset in a range of 0.9-0.98, so that the two collars 411 can rotate around the central line of the rotating shaft 410.
The mounting groove has been seted up at the top of connecting strip 42, two sets are established and are kept away from pivot 410 one end embedding in the mounting groove of same connecting strip 42 at the lantern ring 411 of same pivot 410, and fixed mutually through installing many bolts 412, thereby can make connecting strip 42 can revolve the pivot 410 central line and rotate, the installation and the dismantlement of connecting strip 42 and lantern ring 411 of also being convenient for, improve the installation of support frame 4 and the efficiency of dismantling, can also improve the flexibility that interior stay structure 1 arranged, with the different foundation ditch of the multiple cross sectional shape of adaptation.
In this embodiment, the top surface of the connecting bar 42 is flush with the top surface of the circular buckle 40, so that the supporting plate 3 can be stably placed on the top surfaces of the circular buckle 40 and the connecting bar 42.
In order to better separate the supporting plate 3 from the building structure, in the embodiment, a cement demolding layer is coated on the surface of the supporting plate 3 and the side wall of the supporting hole 30, meanwhile, the supporting frame 4 is made of steel material, and the supporting plate 3 is made of a microporous calcium silicate plate, so that the cement demolding layer can be better bonded with the supporting plate 3, and the service life of the cement demolding layer is prolonged.
In this embodiment, the supporting plate 3 is provided with a plurality of supporting plates, but it is necessary to ensure that the bottom of each supporting plate 3 contacts with a plurality of connecting strips 42 to ensure the supporting function of the supporting plate 3, and the bottom edge of the supporting plate 3 is provided with a circular arc chamfer, so that the supporting plate 3 can be moved more smoothly.
The embodiment of the application also discloses a construction method adopting the inner support structure for the underground structure.
The construction method of the inner support structure for the underground structure comprises the following steps:
step 1: constructing an underground continuous wall 10 at the periphery of the foundation pit by using a trenching machine and matched construction equipment thereof;
step 2: arranging a plurality of jet grouting piles at joints of the underground continuous wall 10 by adopting jet grouting equipment, and forming a fully-closed waterproof curtain surrounding the foundation pit among the plurality of jet grouting piles;
and step 3: the inner support structure is installed inside the underground diaphragm wall 10, and the construction of the underground structure is performed,
wherein step 3 further comprises:
step 3.1: referring to fig. 4, a foundation layer is dug in a foundation pit, a crown beam 11 is built on the top of an underground continuous wall 10 by using reinforced concrete, an assembled support column 2 is vertically driven into a predetermined position at the bottom of the dug foundation layer by using a pile driver and supporting equipment thereof, the bottom depth of the support column 2 is 4-5m greater than the preset bottom depth of the foundation pit, and in the embodiment, the bottom depth of the support column 2 is four meters greater than the preset bottom depth of the foundation pit.
The support frame 4 is pre-dug at the bottom of the foundation layer, the mud pits of the first support block 5 and the second support block 6 are pre-dug, mounting holes matched with the first support block 5 are formed in the preset positions of the side wall of the underground continuous wall 10, then the first support block 5 is movably embedded into the mounting holes by adopting equipment such as a crane and the like, the mounting holes can be extracted out by the first support block 5 through receiving tensile force, the mounting holes are also formed in the inner side wall of the underground continuous wall 10, the second support block 6 is movably embedded into the mounting holes in the inner wall of the underground continuous wall 10, the mounting holes can also be extracted by the second support block 6 through receiving tensile force, the support frame 4 is sleeved on the support column 2, the bottom of the support frame 4 is abutted to the tops of the two ends of the first support block 5, the bottom of the support frame 4 is also abutted to the top of the second support block 5, and the support frame 4 can be stably placed.
The support frame 4 can be pre-installed and then sleeved on the support column 2, or the ring buckle 40 with the slider 41 and the rotating shaft 410 installed can be firstly sleeved on the support column 2, and then the parts such as the lantern ring 411, the bolt 412 and the connecting strip 42 are installed, so that the installation mode is flexible and changeable, and can be determined according to actual conditions.
Step 3.2: after the support frame 4 is installed, the support plates 3 are placed in the positions corresponding to the support frames 4 in a blocking mode through equipment such as a crane, and then leveling is conducted on the support plates 3 in a filling mode, a concrete block mode and the like.
Build steel bar structure on backup pad 3, steel bar structure's edge stretches out has the reinforcing bar embedding in underground connecting wall 11, then lay one deck concrete earlier, the height of first floor concrete exceeds half of steel bar structure height, and the upper surface need not level, the edge of first floor concrete is fixed mutually with underground connecting wall 11, treat that one deck concrete strength reaches 70% -90%, just can lay second floor concrete again, the upper surface is level and smooth, thereby accomplish to build first floor building structure 7 on backup pad 3, for the convenience down dig establish earth, it has a plurality of first unearths 70 of department to reserve on first floor building structure 7, and reserve the filling hole corresponding with brace hole 30 on first floor building structure 7, in this embodiment, first unearths 70 is provided with two, be located the both sides of first floor building structure 7 respectively.
The concrete is laid in layers so that the supporting plate 3 can bear less pressure, the damage to the supporting plate 3 due to overlarge pressure is reduced, and meanwhile, the deformation of the supporting plate 3 can be reduced, so that the flatness of the bottom of the first-layer building structure 7 is improved.
Step 3.3: referring to fig. 5, when the strength of the first building structure 7 reaches 100%, a first structural layer is dug in the foundation pit, the dug soil is conveyed out of the foundation pit from a first soil outlet 70 by using a conveying tool, a reinforcing steel bar frame connected with the reinforcing steel bar structure of the first building structure 7 is built in the support hole 30 of the support plate 3, the bottom of the reinforcing steel bar frame is vertically embedded into the bottom of the first structural layer, a template is formed by enclosing the reinforcing steel bar structure, and concrete is injected from an injection hole reserved in the first building structure 7, so that a first wall column 71 is formed.
Step 3.4: referring to fig. 6, when the strength of the first wall column 71 reaches 100%, a mud pit for accommodating the first supporting block 5 and the second supporting block 6 is dug in advance at the bottom of the first layer of structure layer, an accommodating hole for the second supporting block 6 to be embedded is formed in the side wall of the underground continuous wall 10, the second supporting block 6 is pulled out and moved to the bottom of the first layer of structure layer, and then is movably embedded into the accommodating hole of the underground continuous wall 10, and then the connecting bar 42 at the edge is detached by detaching the bolt 412 and vertically moves downwards to a corresponding position which is abutted against the second supporting block 6.
According to the blocking condition of the support plate 3, the first support block 5 supporting the same support plate 3 is taken down firstly and is installed on the support column 2 of the next layer, then the corresponding ring buckle 40 and the slide block 41, the rotating shaft 410 and the sleeve ring 411 installed with the ring buckle are moved downwards along the support column 2, at the moment, if the support plate 3 is easy to fall off, the support plate 3 is moved together with the support plate 3, if the support plate 3 is not easy to fall off, the support plate 3 is supported by using the support rods firstly, the ring buckle 40 and the slide block 41, the rotating shaft 410 and the sleeve ring 411 installed with the ring buckle are moved firstly along the support column 2, then the support rods are removed, the support plate 3 is moved, and the support plate 3 is moved downwards to the bottom of the first layer structure layer by the same method.
After having removed backup pad 3 and internal stay structure 1, build steel bar structure at the top of backup pad 3 to concreting, in order to accomplish second floor building structure 8's construction, simultaneously, when second floor building structure 8 constructs, it has a plurality of second soil outlet 80 to reserve, so that when digging down and establishing earth, the output of earth, equally, reserve the filling hole in second floor building structure 8 and the corresponding position of brace hole 30.
Step 3.5: referring to fig. 7, when the strength of the second floor structure 8 reaches 100%, a second floor structure is dug in the foundation pit, the dug soil can be transported out of the foundation pit from the second soil outlet 80 and the second soil outlet 80 by means of a transport vehicle, a reinforcing steel bar frame connected with the reinforcing steel bar structure of the second floor structure 8 is built in the support hole 30 of the support plate 3, the bottom of the reinforcing steel bar frame is vertically embedded at the bottom of the second floor structure, a template is arranged on the reinforcing steel bar structure in a surrounding manner, and concrete is injected from an injection hole reserved in the second floor structure 8, so that a second wall column 81 is formed.
Step 3.6: referring to fig. 8, when the strength of the second wall column 81 reaches 100%, if the number of underground preset floors is greater than the number of floors of the constructed building structure, the process of steps 3.4, 3.5 and 3.6 is repeated to continue the construction downwards, if the number of underground preset floors is the same as the number of floors of the constructed building structure, the third layer building structure, the third wall column, the fourth layer building structure and the fourth wall column … …, a bottom reinforcing steel bar frame is erected at the bottom of the final structure layer, concrete is poured, and thus the basement bottom plate 9 is formed, and the basement bottom plate 9 and the underground continuous wall 10 form a complete underground structure.
When the strength of the basement bottom plate 9 reaches 100%, the second supporting block 6 is firstly detached, the underground structure is moved out from the second soil outlet 80 and the first soil outlet 70, then the connecting strip 42 at the edge is detached and moved out of the underground structure through detaching the bolt 412, then the first supporting block 5 supporting the same supporting plate 3 is firstly detached and moved out of the underground structure according to the blocking condition of the supporting plate 3, then the lantern ring 411 and the connecting strip 42 on the corresponding ring buckle 40 are detached, the first supporting block 5 is taken out, and then the remaining ring buckle 40 and the corresponding supporting plate 3 are detached along the length direction of the supporting column 2.
At this moment, the screw rod 23 inside the support column 2 is screwed out by using the rotary drilling machine and the equipment matched with the rotary drilling machine, at this moment, the bottom column 20, the environmental protection column 21 and the fusion column 22 in the support column 2 are disconnected, so that the environmental protection column 21, the ring buckle 40 sleeved on the environmental protection column 21 and the support plate 3 can be taken out, and if the support plate 3 interferes with the bottom wall column at the lowest layer, the support plate 3 is taken out in a separation mode.
And finally, filling the mounting holes left on the side wall of the underground continuous wall 10, the threaded holes of the fusion columns 22 and the threaded holes of the bottom columns 20, so that the raw construction waste generated by building the concrete inner support structure can be reduced, and the effects of energy conservation and environmental protection are achieved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above 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. An internal support structure for an underground structure, characterized by: the supporting structure comprises a supporting column (2), an inner supporting structure (1) and a supporting plate (3), wherein the inner supporting structure (1) comprises a supporting frame (4) arranged on the supporting column (2) in a penetrating mode, and a first supporting block (5) used for supporting the supporting frame (4) is movably arranged on the supporting column (2) in a penetrating mode; the novel wall column is characterized by further comprising a second supporting block (6), the second supporting block (6) is movably embedded into the inner side of the foundation pit, the supporting plate (3) is placed at the top of the supporting frame (4), supporting holes (30) are formed in the supporting plate (3), and the supporting holes (30) are used for building wall columns.
2. An internal support structure for a subterranean structure according to claim 1, wherein: support column (2) are including embedding sill pillar (20), environmental protection post (21), fusion post (22) and threaded rod (23) in the foundation ditch bottom, sill pillar (20) top is connected with environmental protection post (21), sill pillar (20) one end is kept away from in environmental protection post (21) and is connected with fusion post (22), be connected through threaded rod (23) between sill pillar (20), environmental protection post (21) and the fusion post (22).
3. An internal support structure for a subterranean structure according to claim 2, wherein: support column (2) are including a foundation (20) and a plurality of combination that combines by environmental protection post (21) and fusion post (22), foundation (20) adopt concrete reinforcement material to make, environmental protection post (21) and fusion post (22) adopt steel material to make.
4. An internal support structure for a subterranean structure according to claim 1, wherein: support frame (4) are including ring knot (40), slider (41) and connecting strip (42), slider (41) are detained (40) central line circumference around the ring and are slided and set up in the outside that ring detained (40), slider (41) are rotated with connecting strip (42) and are connected, first supporting shoe (5) both ends are detained (40) with the ring and are inconsistent, second supporting shoe (6) one end embedding is on the foundation ditch lateral wall, and slider (41) one end is kept away from with connecting strip (42) at the top of the other end and is inconsistent.
5. An internal support structure for a subterranean structure according to claim 4, wherein: install pivot (410) on slider (41), pivot (410) both sides cover is equipped with lantern ring (411), two the ring cover that lantern ring (411) formed is established on pivot (410), connecting strip (42) are fixed mutually through bolt (412) with two lantern rings (411).
6. An internal support structure for a subterranean structure according to claim 5, wherein: the outside of the ring buckle (40) is provided with a sliding groove (413) with a T-shaped cross section, the two sliding blocks (41) are fixed at two ends of the rotating shaft (410), and the two lantern rings (411) are sleeved between the two sliding blocks (41) on the same rotating shaft (410).
7. An internal support structure for a subterranean structure according to claim 1, wherein: the lateral wall of backup pad (3) top surface and supported hole (30) all scribbles cement demoulding layer, support frame (4) adopt the steel material to make, backup pad (3) adopt micropore calcium silicate board.
8. An internal support structure for a subterranean structure according to claim 1, wherein: the supporting plate (3) is arranged into a plurality of blocks, and the edges of the bottom of the supporting plate (3) are provided with arc chamfers.
9. An internal support structure for a subterranean structure according to claim 1, wherein: and a pressing block (60) is arranged at the bottom of one end, far away from the side wall of the foundation pit, of the second supporting block (6), and when the second supporting block (6) is partially embedded into the side wall of the foundation pit, one side of the pressing block (60) is pressed on the side wall of the foundation pit.
10. A method of constructing an underground structure using the inner support structure of any one of claims 1 to 8, comprising:
step 1: constructing an underground continuous wall (10) at the periphery of the construction foundation pit;
step 2: arranging a plurality of jet grouting piles at joints of the underground continuous wall (10) to form a fully-closed waterproof curtain surrounding the foundation pit;
and step 3: the construction of the underground structure is carried out inside the underground continuous wall (10),
the step 3 comprises the following steps:
step 3.1: digging a foundation layer in a foundation pit, constructing a crown beam (11) at the top of an underground continuous wall (10), installing a support column (2) at the bottom of the foundation layer, wherein the bottom depth of the support column (2) is 4-5m greater than the preset bottom depth of the foundation pit, installing an inner support structure (1) at the bottom of the foundation layer, and installing the inner support structure (1) on the support column (2);
step 3.2: laying a support plate (3) on an internal bracing structure (1), building a first-layer building structure (7) on the support plate (3), and reserving a plurality of first soil outlets (70) in the first-layer building structure (7);
step 3.3: when the strength of the first-layer building structure (7) reaches 100%, digging a first-layer structural layer in the foundation pit, conveying the dug soil out of the foundation pit from a first soil outlet (70) by means of a conveying tool, and building a first wall column (71) for supporting the first-layer building structure (7) through the supporting hole (30);
step 3.4: detaching the inner supporting structure (1) and the supporting plate (3), moving to the bottom of the first-layer structural layer, installing, and then constructing a second-layer building structure (8) on the supporting plate (3), wherein a plurality of second soil outlets (80) are reserved in the second-layer building structure (8);
step 3.5: when the strength of the second-layer building structure (8) reaches 100%, digging a second-layer structure layer in the foundation pit, conveying the dug soil out of the foundation pit from a second soil outlet (80) and a first soil outlet (70) by means of a conveying tool, and building a second wall column (81) for supporting the second-layer building structure (8) at the bottom of the internal bracing structure (1);
step 3.6: repeating the steps until the number of the building structure layers reaches the preset requirement, pouring a basement bottom plate (9) at the bottom of the last structural layer, wherein the basement bottom plate (9) and the underground continuous wall (10) form a complete underground structure, and detaching the inner support structure (1), the support plate (3) and the support column (2) and cleaning and storing the inner support structure, the support plate and the support column when the strength of the basement bottom plate (9) reaches 100% for next use.
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| CN115053748A (en) * | 2022-07-19 | 2022-09-16 | 中国农业科学院果树研究所 | Method for installing stand column in orchard supporting system |
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| CN113338305B (en) | 2022-06-10 |
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