CN115030205A - Deep foundation pit raft, sump well and elevator shaft integrated rapid construction method - Google Patents
Deep foundation pit raft, sump well and elevator shaft integrated rapid construction method Download PDFInfo
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- CN115030205A CN115030205A CN202210636625.1A CN202210636625A CN115030205A CN 115030205 A CN115030205 A CN 115030205A CN 202210636625 A CN202210636625 A CN 202210636625A CN 115030205 A CN115030205 A CN 115030205A
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 183
- 239000010959 steel Substances 0.000 claims abstract description 183
- 239000004567 concrete Substances 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000002689 soil Substances 0.000 claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 93
- 230000003014 reinforcing effect Effects 0.000 claims description 49
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 22
- 229920003023 plastic Polymers 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 11
- 239000011241 protective layer Substances 0.000 claims description 8
- 238000009415 formwork Methods 0.000 claims description 7
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 239000011178 precast concrete Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 2
- 210000003205 muscle Anatomy 0.000 claims description 2
- 239000011449 brick Substances 0.000 description 5
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- 239000012528 membrane Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006378 damage Effects 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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/22—Lining sumps in trenches or other 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
- 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
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
- E02D27/02—Flat foundations without substantial excavation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention discloses an integrated rapid construction method of a deep foundation pit raft, a water collecting well and an elevator shaft, which comprises the following steps: excavating a local deep pit of the collecting well elevator shaft on the upper part of a soil body at the bottom of the cement soil mixing pile foundation pit and arranging side slopes around the inside of the local deep pit of the collecting well elevator shaft; laying a concrete cushion; laying a waterproof structure on the concrete cushion layer, and mounting raft plate steel bars on the waterproof structure; installing foundation column dowel bars at the position of a raft plate early-pouring zone, installing galvanized flow rib nets at two sides of a raft plate later-pouring zone, installing a foundation catchment well elevator shaft inner template system in a local deep pit of a catchment well elevator shaft, and pouring raft plate concrete to form a reinforced concrete foundation; removing the inner template system of the basic sump pit elevator shaft to form a sump pit elevator shaft; and pouring concrete at the post-cast strip of the raft plate to form a post-cast strip concrete structure. The invention has the advantages that: the integrated rapid construction of the deep foundation pit raft, the water collecting well and the elevator shaft is realized.
Description
Technical Field
The invention relates to the technical field of foundation pit construction, in particular to a deep foundation pit raft, a sump well and an elevator shaft integrated rapid construction method.
Background
When constructing deep foundation pit raft sump pit elevator shaft, general construction steps are: building up a building enclosure, reinforcing at the bottom of a foundation pit, excavating earthwork, excavating secondary earthwork at deep positions such as a collecting well elevator shaft bearing platform, manually repairing the bottom and finishing a side slope, building a brick platform film, painting the brick platform film, constructing waterproof coiled materials, constructing a waterproof protective layer, binding lower-layer steel bars at deep positions such as the collecting well elevator shaft bearing platform, binding lower-layer steel bars of a raft, installing a non-opening transmission belt, binding upper-layer raft steel bars on site, binding rear-pouring belt position water-stopping steel plate ampere, installing a rear-pouring belt position template, installing column wall inserted bars, installing a collecting well elevator shaft template, and completing raft concrete pouring.
The method needs a large amount of brick platform membranes and needs to be brushed, the construction period is long, and the construction period is longer due to influence in rainy seasons; the construction of the waterproof layer needs to wait for the drying of the base layer, the waiting time is long, and the construction of the protective layer needs to be carried out after the construction of the waterproof layer; the reinforcing steel bars of the elevator shaft of the raft water collecting well are bound manually on site, a large number of reinforcing steel bar operators are needed in on-site time, the prefabrication degree is low, and the construction speed is low; the conventional post-cast strip force transmission belt is not provided with air holes, so that the post-cast strip is easy to vibrate, is not compact and hollows when concrete is poured, and has poor water stopping effect; the post-cast strip is not communicated with the elevator shaft of the water collecting well in the empty period, and when the post-cast strip is maintained in rainy days or concrete, water and steel bars are always corroded in the post-cast strip, so that the post-cast strip is poor in civilized construction and easy to generate potential safety hazards; the construction from the excavation of the foundation pit to the pouring of the raft is completed, the service life is long, the foundation pit is exposed for a long time and is not closed, and the safety of the foundation pit is not facilitated. Has the defects of high cost, long construction period, unfavorable safety management and the like.
Disclosure of Invention
The invention aims to provide a deep foundation pit raft, a water collecting well and an elevator shaft integrated rapid construction method according to the defects of the prior art, and the deep foundation pit raft, the water collecting well and the elevator shaft integrated rapid construction is realized by improving the construction method.
The purpose of the invention is realized by the following technical scheme:
a deep foundation pit raft, sump pit and elevator shaft integrated rapid construction method is characterized by comprising the following steps:
a. excavating a foundation pit and reinforcing soil below the bottom of the foundation pit to form soil at the bottom of a cement soil mixing pile foundation pit, excavating a local deep pit of a sump shaft at the upper part of the soil at the bottom of the cement soil mixing pile foundation pit and arranging side slopes around the inside of the local deep pit of the sump shaft;
b. paving concrete cushions on the upper part of the soil body at the bottom of the cement soil mixing pile foundation pit, the bottom of the local deep pit of the elevator shaft of the collecting well and the side slope;
c. paving a waterproof structure on the concrete cushion layer, and installing raft steel bars on the waterproof structure;
d. installing foundation column dowel bars at the position of a raft plate first-cast strip, installing galvanized flow rib nets at two sides of a raft plate later-cast strip, installing a foundation sump shaft inner template system in a local deep pit of the sump shaft, and pouring raft plate concrete to form a reinforced concrete foundation; (ii) a Removing the inner template system of the basic sump pit elevator shaft to form a sump pit elevator shaft;
e. and pouring concrete at the post-cast strip of the raft plate to form a post-cast strip concrete structure.
The raft steel bars comprise prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces, prefabricated catchment well elevator shaft side wall steel bar net pieces, prefabricated raft bottom steel bar net pieces and prefabricated catchment raft upper layer ribs-well wall side wall vertical rib integrated steel bar net pieces, the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces are installed in a local deep pit of the catchment well elevator shaft, the prefabricated catchment well elevator shaft side wall steel bar net pieces are installed on the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces, and the prefabricated raft bottom steel bar net pieces are installed on a waterproof structure of the upper portion of a cement mixing pile foundation pit bottom soil body and are connected with the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces; the prefabricated raft bottom layer steel bar net piece is provided with a section steel combined force transmission belt and a steel guide pipe at a raft rear pouring belt, a rear pouring belt horizontal steel bar water stop belt is connected between the section steel combined force transmission belts, and one end of the steel guide pipe extends into a local deep pit of the water collecting well elevator shaft; and the prefabricated raft collecting plate upper layer rib-well wall side wall vertical rib integrated reinforcing steel bar net piece is arranged on the profile steel combined force transmission belt.
The concrete cushion layer on the upper part of the soil body at the bottom of the cement mixing pile foundation pit is formed by pouring concrete on the upper part of the soil body at the bottom of the cement mixing pile foundation pit; the concrete cushion layer at the bottom of the local pit of the collecting well elevator shaft is formed by pouring concrete at the bottom of the local pit of the collecting well elevator shaft or laying a precast concrete pit cushion layer at the bottom of the local pit of the collecting well elevator shaft; the concrete cushion layer on the side slope is formed by laying a plastic grid net on the side slope and pouring concrete on the plastic grid net or laying a prefabricated concrete side slope cushion layer on the side slope.
The waterproof structure consists of a waterproof layer and a fine aggregate concrete waterproof protective layer laid on the waterproof layer, or consists of anti-adhesion waterproof rolls; the waterproof layer is one of a urine-gathering waterproof layer, a polyurethane waterproof layer and an anti-sticking waterproof layer.
The U-shaped reinforcing mesh at the bottom of the prefabricated water collecting well elevator shaft is an inverted trapezoid reinforcing mesh, and the shape and the size of the U-shaped reinforcing mesh are respectively adapted to the shape and the size of a local deep pit of the water collecting well elevator shaft; the prefabricated U-shaped steel bar net piece at the bottom of the elevator shaft of the collecting well comprises four side steel bar net pieces and a bottom steel bar net piece, the bottom steel bar net piece is arranged at the bottom of a space formed by the four side steel bar net pieces in a surrounding mode and is connected with the four side steel bar net pieces, and the upper portions of the four side steel bar net pieces extend to the outside of a local deep pit of the elevator shaft of the collecting well; the side reinforcing steel bar meshes comprise first U-shaped reinforcing steel bars and second U-shaped reinforcing steel bars arranged on two sides of the first U-shaped reinforcing steel bars, and the side reinforcing steel bar meshes are connected together through the connection of the second U-shaped reinforcing steel bars;
the prefabricated water collecting well elevator shaft side wall reinforcing steel bar net piece is a well-shaped reinforcing steel bar net piece with a bottom, and comprises horizontal reinforcing steel bars at the upper part of the bottom of a water collecting well elevator, longitudinal reinforcing steel bars at the upper part of the bottom of the water collecting well elevator, horizontal reinforcing steel bars at the side wall of the water collecting well elevator shaft and longitudinal reinforcing steel bars at the side wall of the water collecting well elevator shaft;
the prefabricated raft bottom layer steel bar mesh is an annular steel bar mesh, the inner ring of the prefabricated raft bottom layer steel bar mesh is connected with the upper part of the prefabricated water collecting well elevator shaft bottom U-shaped steel bar mesh, and the prefabricated raft bottom layer steel bar mesh comprises raft bottom layer transverse long steel bars, raft bottom layer transverse short steel bars, raft bottom layer longitudinal long steel bars and raft bottom layer longitudinal short steel bars;
the section steel combined force transmission belt comprises four side plates and a middle plate, the middle plate is arranged in the middle of a space formed by the four side plates in an enclosing mode and is connected with the four side plates, and a plurality of vent holes are formed in the middle plate;
the post-pouring water stop belt with the horizontal steel bars comprises two steel water stop steel plates with upturned folding angles, and the two steel water stop steel plates are respectively arranged on two sides of the section steel combined force transmission belt;
prefabricated raft collection board upper rib-vertical muscle integration reinforcing bar net piece of wall of a well lateral wall include cyclic annular reinforcing bar net structure and with the square tubular reinforcing bar net structure that cyclic annular reinforcing bar net structure inner ring is connected, cyclic annular reinforcing bar net structure includes the horizontal long reinforcement of raft upper strata, the horizontal short reinforcement of raft upper strata, the vertical long reinforcement of raft upper strata and the vertical short reinforcement of raft upper strata, square tubular reinforcing bar net structure installs in the prefabricated sump pit elevartor shaft lateral wall reinforcing bar net piece.
The foundation column joint bars are connected with the raft plate steel bars, and the foundation column joint bars comprise column or wall joint bars and internal positioning stirrups.
The foundation sump pit elevator shaft inner formwork system is arranged in a square tubular reinforcing mesh structure of the prefabricated raft collecting plate upper layer rib-well wall side wall vertical rib integrated reinforcing mesh piece, and comprises a sump pit elevator shaft inner formwork and a framework system.
The invention has the advantages that: the integrated rapid construction of the deep foundation pit raft, the water collecting well and the elevator shaft is realized; possess construction speed fast, need not brick bench formwork, reinforcement prefabricated degree is high, the steel bar installation adopts assembled hoist and mount installation, convenient operation, excavate from the earthwork to the raft board is pour and is accomplished whole time limit for a project short, significant to deep basal pit safety guarantee, save the cost simultaneously.
Drawings
FIG. 1 is a schematic view of the construction structure of the present invention as a whole;
FIG. 2 is a schematic diagram of a soil structure of a pit bottom of the cement soil mixing pile foundation pit of the invention;
FIG. 3 is a schematic view of a sump well shaft partial pit installation of the present invention;
FIG. 4 is a schematic illustration of the concrete underlayment structure of the present invention;
FIG. 5 is a schematic illustration of the installation of the concrete underlayment of the present invention;
fig. 6 is a schematic view of the installation of the waterproof layer of the present invention;
FIG. 7 is a schematic view of the installation of the reverse adhesion type waterproofing membrane of the present invention;
FIG. 8 is a schematic view of the installation of the waterproof protective layer of fine aggregate concrete according to the present invention;
FIG. 9 is a schematic structural view of a U-shaped steel bar mesh sheet at the bottom of the prefabricated sump pit elevator shaft;
FIG. 10 is a schematic view of the installation of U-shaped steel bar mesh sheets at the bottom of the elevator shaft of the prefabricated water collecting well according to the invention;
fig. 11 is a schematic structural view of a reinforcing mesh sheet on the side wall of the prefabricated collector well elevator shaft;
FIG. 12 is a schematic view of the installation of the reinforcing mesh on the side wall of the elevator shaft of the prefabricated water collecting well according to the invention;
fig. 13 is a schematic view of the structure of the bottom layer reinforcing mesh of the prefabricated raft;
fig. 14 is a schematic view of the installation of the bottom layer reinforcing mesh of the prefabricated raft;
FIG. 15 is a schematic view of the force-transmitting belt structure of the steel section assembly of the present invention;
FIG. 16 is a schematic view of the installation of the force-transmitting belt made of the combined profile steel of the present invention;
FIG. 17 is a schematic view (one) of the installation of the steel conduit of the present invention;
FIG. 18 is a schematic view of the installation of the steel duct of the present invention;
FIG. 19 is a first schematic view of the installation of a horizontal reinforcement water stop of the post-cast strip of the present invention;
FIG. 20 is a schematic view of the installation of a horizontal reinforcing steel bar water stop of the post-pouring belt of the present invention;
fig. 21 is a schematic structural view of an integrated reinforcing mesh of an upper layer rib and a sidewall vertical rib of a well wall of the prefabricated raft collecting plate of the invention;
fig. 22 is a schematic view of the installation of the integrated reinforcing mesh of the upper layer ribs and the vertical ribs on the side wall of the well wall of the prefabricated raft collecting plate;
FIG. 23 is a schematic view of the foundation column tendon installation of the present invention;
FIG. 24 is a schematic view of the installation of a galvanized reinforcing mesh in accordance with the present invention;
fig. 25 is a concrete pouring schematic diagram of the raft according to the present invention;
fig. 26 is a schematic view of the installation of the formwork system in the elevator shaft of the basic water collecting well of the invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-26, reference numerals 1-13 in the figures are respectively indicated as soil body 1 at the bottom of a cement-soil mixing pile foundation pit, a local deep pit 101 of a collecting well and an elevator shaft, and a side slope 102; the concrete side-slope and side-pit combined concrete floor comprises a concrete cushion layer 2, a plastic grid net 201, a plastic grid 201-1, a concrete side-slope cushion layer 202, a concrete deep-pit cushion layer 203, a concrete foundation pit cushion layer 204, a precast concrete side-slope cushion layer 205 and a precast concrete deep-pit cushion layer 206; waterproof layer 3, reverse-adhesion waterproof roll 301; a fine stone concrete waterproof protective layer 4; the prefabricated water collecting well elevator shaft bottom U-shaped steel bar mesh sheet 501, first U-shaped steel bars 501-1, second U-shaped steel bars 501-2, prefabricated water collecting well elevator shaft side wall steel bar mesh sheet 502, water collecting well elevator bottom upper transverse steel bars 502-1, water collecting well elevator bottom upper longitudinal steel bars 502-2, water collecting well elevator shaft side wall transverse steel bars 502-3, water collecting well elevator shaft side wall longitudinal steel bars 502-4, prefabricated raft bottom layer steel bar mesh sheet 503, raft lower layer transverse long steel bars 503-1, raft lower layer transverse short steel bars 503-2, raft lower layer longitudinal long steel bars 503-3, raft lower layer longitudinal short steel bars 503-4, prefabricated raft collecting plate upper layer steel bar-well wall vertical steel bar integrated steel bar mesh sheet 504, raft upper layer transverse long steel bars 504-1, raft upper layer transverse short steel bars 504-2, raft upper layer transverse short steel bars 504-4, prefabricated raft lower layer vertical short steel bars 502-4, prefabricated raft collecting well elevator shaft side wall vertical steel bar integrated steel bar mesh sheet 504-1, raft upper layer transverse long steel bars 504-1, raft upper layer transverse short steel bars 504-2, The raft plate comprises raft plate upper layer longitudinal long steel bars 504-3, raft plate upper layer longitudinal short steel bars 504-4 and raft plate concrete 505; the steel section combined force transmission belt comprises a section steel combined force transmission belt 6, a left-end square steel end plate 601, a right-end square steel end plate 602, a front-end rectangular steel plate 603, a rear-end rectangular steel plate 604, a middle steel plate 605 and a vent hole 605-1; a steel guide tube 7; then pouring a water stop belt 8 with horizontal steel bars and a steel water stop steel plate 801; a galvanized reinforcing bar net 9; a foundation column dowel bar 10; a basic sump pit elevator shaft inner template system 11; a sump shaft 12; and a raft plate post-pouring belt 13.
Example (b): as shown in fig. 1-26, the embodiment relates to a deep foundation pit raft, water collecting well and elevator shaft integrated rapid construction method, which comprises the following steps:
a. as shown in fig. 1-3, a foundation pit is excavated and soil below the bottom of the foundation pit is reinforced to form soil 1 at the bottom of a cement-soil mixing pile foundation pit, a catch pit shaft local pit 101 is excavated at the upper part of the soil 1 at the bottom of the cement-soil mixing pile foundation pit, and side slopes 102 are arranged around the inside of the catch pit shaft local pit 101.
b. And paving a concrete cushion layer 2 on the upper part of a soil body 1 at the bottom of the cement soil mixing pile foundation pit, the bottom of a local deep pit 101 of a collecting well elevator shaft and a side slope 102.
Wherein, the concrete cushion layer 2 on the upper part of the soil body 1 at the bottom of the cement mixing pile foundation pit is formed by pouring concrete on the upper part of the soil body 1 at the bottom of the cement mixing pile foundation pit (a concrete foundation pit cushion layer 204 can be formed); the concrete cushion 2 at the bottom of the catch pit elevator shaft local pit 101 is formed by pouring concrete (which can form a concrete pit cushion 203) at the bottom of the catch pit elevator shaft local pit 101 or laying a precast concrete pit cushion 206 at the bottom of the catch pit elevator shaft local pit 101; the concrete cushion layer 2 on the side slope 102 is formed by laying a plastic grid net 201 on the side slope 102 and pouring concrete (the concrete side slope cushion layer 202 can be formed, and the plastic grid net 201 is positioned in the middle of the concrete side slope cushion layer 202) on the plastic grid net 201 or laying a prefabricated concrete side slope cushion layer 205 on the side slope 102, wherein the plastic grid net 201 is composed of a plurality of plastic grids 201-1, and the plastic grid net 201 can prevent concrete from falling.
c. Lay on concrete cushion 2 and be equipped with waterproof construction to install raft reinforcing bar on waterproof construction.
As shown in fig. 6 and 8, a waterproof layer 3 is laid on the concrete cushion layer 2 for waterproofing, and in this embodiment, the waterproof layer 3 is one of a urine-collecting waterproof layer, a polyurethane waterproof layer, and an anti-sticking waterproof layer. Waterproof layer 3 upper berth is equipped with pea gravel concrete waterproof layer 4, causes destruction to waterproof layer 3 when avoiding follow-up raft board bar construction. As shown in fig. 7, an anti-adhesion waterproof roll 301 may be laid on the concrete cushion layer 2, and raft reinforcing steel bars may be directly laid on the surface of the anti-adhesion waterproof roll 301, so that the need to pour the fine aggregate concrete waterproof protective layer 4 on the surface of the waterproof layer 3 may be eliminated.
In addition, the raft steel bars comprise prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces 501, prefabricated catchment well elevator shaft side wall steel bar net pieces 502, prefabricated raft bottom layer steel bar net pieces 503 and prefabricated catchment raft upper layer rib-well wall side wall vertical rib integrated steel bar net pieces 504, as shown in fig. 9-10, the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces 501 are installed in the catchment well elevator shaft local deep pit 101, wherein the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces 501 are inverted-ladder-shaped steel bar net pieces, and the shapes and the sizes of the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces are respectively adapted to the shapes and the sizes of the catchment well elevator shaft local deep pit 101; the U-shaped steel bar mesh sheet 501 at the bottom of the prefabricated water collecting well elevator shaft comprises four side steel bar mesh sheets and a bottom steel bar mesh sheet, the bottom steel bar mesh sheet is arranged at the bottom of a space formed by the four side steel bar mesh sheets in a surrounding mode and is connected with the four side steel bar mesh sheets, and the upper portions of the four side steel bar mesh sheets all extend out of a local deep pit of the water collecting well elevator shaft; the lateral steel bar net sheets comprise a plurality of first U-shaped steel bars 501-1 which are equal in length, transversely or longitudinally arranged and a plurality of second U-shaped steel bars 501-2 which are arranged on two sides of the first U-shaped steel bars 501-1 and are transversely or longitudinally changed in proportion, and the lateral steel bar net sheets are connected together through the connection of the second U-shaped steel bars 501-2. As shown in fig. 11-12, prefabricated catchment well elevator shaft side wall reinforcing steel bar net pieces 502 are installed on the prefabricated catchment well elevator shaft bottom U-shaped reinforcing steel bar net pieces 501, wherein the prefabricated catchment well elevator shaft side wall reinforcing steel bar net pieces 502 are well-shaped reinforcing steel bar net pieces with bottoms, and comprise catchment well elevator bottom upper portion transverse reinforcing steel bars 502-1, catchment well elevator bottom upper portion longitudinal reinforcing steel bars 502-2, catchment well elevator shaft side wall transverse reinforcing steel bars 502-3 and catchment well elevator shaft side wall longitudinal reinforcing steel bars 504. As shown in fig. 13-14, a prefabricated raft foundation rebar mesh sheet 503 is installed on a fine aggregate concrete waterproof protective layer 4 (or an anti-adhesive waterproof coiled material 301) on the upper portion of a cement mixing pile foundation pit bottom soil body 1 and connected with a prefabricated water collecting well elevator shaft bottom U-shaped rebar mesh sheet 501, wherein the prefabricated raft foundation rebar mesh sheet 503 is an annular rebar mesh sheet, an inner ring of the annular rebar mesh sheet is connected with the upper portion of the prefabricated water collecting well elevator shaft bottom U-shaped rebar mesh sheet 501, and the prefabricated raft foundation rebar mesh sheet 503 comprises raft foundation transverse long rebar 503-1, raft foundation transverse short rebar 503-2, raft foundation longitudinal long rebar 503-3 and raft foundation longitudinal short rebar 503-4. The prefabricated raft bottom layer steel bar mesh 503 is provided with a section steel combined force transmission belt 6 and a steel guide pipe 7 at the position of a raft post-cast belt 13, a post-cast belt horizontal steel bar water stop belt 8 is connected between the section steel combined force transmission belts 6, one end of the steel guide pipe 7 extends into a local deep pit 101 of a sump shaft, wherein, as shown in figures 15-16, the section steel combined force transmission belt 6 comprises four side plates (a left end square steel end plate 601, a right end square steel end plate 602, a front end rectangular steel plate 603 and a rear end rectangular steel plate 604) and an intermediate steel plate 605, the intermediate steel plate 605 is arranged in the middle of a space formed by enclosing the four side plates and connected with the four side plates, a plurality of vent holes 605-1 (the diameter is larger than 60 mm) are arranged on the intermediate steel plate 605, when the vent holes-1 are used for casting post-cast belt concrete, the force transmission belt formed by enclosing the left, the front, the rear and the intermediate steel plates is prevented from being sealed and incapable of being vibrated and compacted, the functions of ventilation and air entraining are achieved, in addition, the section steel combined force transmission belts 6 are arranged in groups at equal intervals, the integral transmission of two side forces is achieved, the stress of the whole segmented reinforced concrete raft is transmitted to the pit wall of the large foundation pit, and the integral safety of the large foundation pit is ensured; as shown in fig. 17-18, the steel conduit 7 has a certain gradient and is used for connecting the raft plate post-cast strip 13 with the sump shaft 12, so that before the post-cast strip is cast, the accumulated water in the post-cast strip is automatically discharged into the sump shaft elevator shaft during the whole building structure construction period, and the accumulated water is completely discharged through a drainage pump arranged in the sump shaft, so that no accumulated water is in the foundation pit; as shown in fig. 19-20, the post-cast horizontal reinforced water stop 8 includes two steel water stop steel plates 801 with upturned folding angles, and the two steel water stop steel plates 801 are respectively disposed on two sides of the profile steel combined force transmission belt 6, wherein one half of the steel water stop steel plates 801 is cast in the raft foundation which is cast in advance, and the other half is cast in the post-cast concrete, so as to play a role in water stop of the reinforced concrete raft. As shown in fig. 21-22, prefabricated raft collecting plate upper rib-well wall side wall vertical rib integrated reinforcing mesh piece 504 is installed on profile steel combined force transmission belt 8, wherein prefabricated raft collecting plate upper rib-well wall side wall vertical rib integrated reinforcing mesh piece 504 comprises an annular reinforcing mesh structure and a square tubular reinforcing mesh structure connected with an inner ring of the annular reinforcing mesh structure, the annular reinforcing mesh structure comprises raft 504 upper transverse long reinforcing bars 504-1, raft upper transverse short reinforcing bars 504-2, raft upper longitudinal long reinforcing bars 504-3 and raft upper longitudinal short reinforcing bars 504-4, and the square tubular reinforcing mesh structure is installed in prefabricated water collecting well elevator shaft side wall reinforcing mesh piece 502.
d. Installing a foundation column dowel bar 10 at a cast-in-place area of the raft, connecting the foundation column dowel bar 10 with a raft steel bar, wherein the foundation column dowel bar 10 comprises a column or wall dowel bar and an internal positioning stirrup, and forming a frame column or wall through binding; the galvanized flow rib nets 9 are arranged on two sides of the raft plate post-cast strip 13, so that a rough joint surface can be formed and is used for intercepting the flow of the raft plate concrete poured in advance into the raft plate post-cast strip 13; installing a basic sump shaft inner template system 11 in a local deep pit 101 of a sump shaft (in a square tubular reinforcing steel bar net structure of a prefabricated raft plate upper layer rib-well wall side wall vertical rib integrated reinforcing steel bar net piece 504), wherein the basic sump shaft inner template system 11 comprises a sump shaft inner template and a framework system; pouring raft slab concrete 505 to form a reinforced concrete foundation 5; and (3) removing the inner template system 11 of the basic sump pit elevator shaft to form a sump pit elevator shaft 12.
e. And pouring concrete at the position of the raft plate post-cast strip 13 to form a post-cast strip concrete structure. The post-cast strip concrete structure is formed by post-cast strip concrete and raft plate steel bars, and specifically means that concrete is poured on the raft plate post-cast strip 13 after the raft plate post-cast strip 13 meets the requirements of capping and designing of the main structure for a determined time (the concrete has no shrinkage and micro-expansion characteristics).
In conclusion, in the embodiment, the integrated rapid construction of the deep foundation pit raft, the water collecting well and the elevator shaft is realized; possess construction speed fast, need not brick bench formwork, reinforcement prefabricated degree is high, the steel bar installation adopts assembled hoist and mount installation, convenient operation, excavate from the earthwork to the raft board is pour and is accomplished whole time limit for a project short, significant to deep basal pit safety guarantee, save the cost simultaneously.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description is not necessary here.
Claims (7)
1. A deep foundation pit raft, sump pit and elevator shaft integrated rapid construction method is characterized by comprising the following steps:
a. excavating a foundation pit and reinforcing soil below the bottom of the foundation pit to form a soil body at the bottom of the cement soil mixing pile foundation pit, excavating a local deep pit of the elevator shaft of the water collecting well on the upper part of the soil body at the bottom of the cement soil mixing pile foundation pit and arranging side slopes around the inside of the local deep pit of the elevator shaft of the water collecting well;
b. concrete cushions are paved on the upper part of the soil body at the bottom of the cement soil mixing pile foundation pit, the bottom of the local deep pit of the elevator shaft of the collecting well and the side slope;
c. paving a waterproof structure on the concrete cushion layer, and installing raft steel bars on the waterproof structure;
d. installing foundation column dowel bars at a raft plate early-pouring zone, installing galvanized flow rib nets at two sides of a raft plate later-pouring zone, installing a foundation catchment well elevator shaft inner template system in a local deep pit of the catchment well elevator shaft, and pouring raft plate concrete to form a reinforced concrete foundation; removing the inner template system of the basic sump pit elevator shaft to form a sump pit elevator shaft;
e. and pouring concrete at the post-cast strip of the raft plate to form a post-cast strip concrete structure.
2. The integrated rapid construction method of deep foundation pit raft, water collecting well and elevator shaft of claim 1, characterized in that: the raft steel bars comprise prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces, prefabricated catchment well elevator shaft side wall steel bar net pieces, prefabricated raft bottom steel bar net pieces and prefabricated catchment raft upper layer ribs-well wall side wall vertical rib integrated steel bar net pieces, the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces are installed in a local deep pit of the catchment well elevator shaft, the prefabricated catchment well elevator shaft side wall steel bar net pieces are installed on the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces, and the prefabricated raft bottom steel bar net pieces are installed on a waterproof structure of the upper portion of a cement mixing pile foundation pit bottom soil body and are connected with the prefabricated catchment well elevator shaft bottom U-shaped steel bar net pieces; the prefabricated raft bottom layer steel bar net piece is provided with a section steel combined force transmission belt and a steel guide pipe at a raft rear pouring belt, a rear pouring belt horizontal steel bar water stop belt is connected between the section steel combined force transmission belts, and one end of the steel guide pipe extends into a local deep pit of the water collecting well elevator shaft; and the prefabricated raft collecting plate upper layer rib-well wall side wall vertical rib integrated reinforcing mesh is arranged on the profile steel combined force transmission belt.
3. The integrated rapid construction method of deep foundation pit raft, water collecting well and elevator shaft of claim 1, characterized in that: the concrete cushion layer on the upper part of the soil body at the bottom of the cement mixing pile foundation pit is formed by pouring concrete on the upper part of the soil body at the bottom of the cement mixing pile foundation pit; the concrete cushion layer at the bottom of the local pit of the collecting well elevator shaft is formed by pouring concrete at the bottom of the local pit of the collecting well elevator shaft or laying a precast concrete pit cushion layer at the bottom of the local pit of the collecting well elevator shaft; the concrete cushion layer on the side slope is formed by laying a plastic grid net on the side slope and pouring concrete on the plastic grid net or laying a prefabricated concrete side slope cushion layer on the side slope.
4. The integrated rapid construction method of deep foundation pit raft, water collecting well and elevator shaft of claim 1, characterized in that: the waterproof structure consists of a waterproof layer and a fine aggregate concrete waterproof protective layer laid on the waterproof layer, or consists of an anti-adhesion waterproof roll; the waterproof layer is one of a urine-gathering waterproof layer, a polyurethane waterproof layer and an anti-sticking waterproof layer.
5. The integrated rapid construction method of deep foundation pit raft, water collecting well and elevator shaft of claim 2, characterized in that: the U-shaped reinforcing mesh at the bottom of the prefabricated water collecting well elevator shaft is an inverted trapezoid reinforcing mesh, and the shape and the size of the U-shaped reinforcing mesh are respectively adapted to the shape and the size of a local deep pit of the water collecting well elevator shaft; the U-shaped steel bar net piece at the bottom of the prefabricated water collecting well elevator shaft comprises four side steel bar net pieces and one bottom steel bar net piece, the bottom steel bar net piece is arranged at the bottom of a space formed by the four side steel bar net pieces in a surrounding mode and is connected with the four side steel bar net pieces, and the upper portions of the four side steel bar net pieces extend to the outside of a local deep pit of the water collecting well elevator shaft; the side reinforcing steel bar meshes comprise first U-shaped reinforcing steel bars and second U-shaped reinforcing steel bars arranged on two sides of the first U-shaped reinforcing steel bars, and the side reinforcing steel bar meshes are connected together through the connection of the second U-shaped reinforcing steel bars;
the prefabricated water collecting well elevator shaft side wall reinforcing steel bar net piece is a well-shaped reinforcing steel bar net piece with a bottom, and comprises horizontal reinforcing steel bars at the upper part of the bottom of a water collecting well elevator, longitudinal reinforcing steel bars at the upper part of the bottom of the water collecting well elevator, horizontal reinforcing steel bars at the side wall of the water collecting well elevator shaft and longitudinal reinforcing steel bars at the side wall of the water collecting well elevator shaft;
the prefabricated raft bottom steel mesh sheet is an annular steel mesh sheet, the inner ring of the prefabricated raft bottom steel mesh sheet is connected with the upper part of the U-shaped steel mesh sheet at the bottom of the prefabricated water collecting well elevator shaft, and the prefabricated raft bottom steel mesh sheet comprises raft bottom transverse long steel bars, raft bottom transverse short steel bars, raft bottom longitudinal long steel bars and raft bottom longitudinal short steel bars;
the section steel combined force transmission belt comprises four side plates and a middle plate, the middle plate is arranged in the middle of a space formed by the four side plates in an enclosing mode and is connected with the four side plates, and a plurality of vent holes are formed in the middle plate;
the post-pouring water stop belt with the horizontal steel bars comprises two steel water stop steel plates with upturned folding angles, and the two steel water stop steel plates are respectively arranged on two sides of the section steel combined force transmission belt;
prefabricated collection raft board upper strata muscle-vertical muscle integration reinforcing bar net piece of wall of a well lateral wall include cyclic annular reinforcing bar network structure and with the square tubular reinforcing bar network structure that cyclic annular reinforcing bar network structure inner ring connects, cyclic annular reinforcing bar network structure includes the horizontal long reinforcement of raft board upper strata, the horizontal short reinforcement of raft board upper strata, the vertical long reinforcement of raft board upper strata and the vertical short reinforcement of raft board upper strata, square tubular reinforcing bar network structrual installation in prefabricated sump pit elevartor shaft lateral wall reinforcing bar net piece.
6. The integrated rapid construction method of deep foundation pit raft, water collecting well and elevator shaft of claim 1, characterized in that: the foundation column dowel bars are connected with the raft reinforcing steel bars, and the foundation column dowel bars comprise column or wall dowel bars and internal positioning stirrups.
7. The integrated rapid construction method of deep foundation pit raft, water collecting well and elevator shaft of claim 5, wherein: the foundation sump pit elevator shaft inner formwork system is arranged in a square tubular reinforcing mesh structure of the prefabricated raft collecting plate upper layer rib-well wall side wall vertical rib integrated reinforcing mesh piece, and comprises a sump pit elevator shaft inner formwork and a framework system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210636625.1A CN115030205B (en) | 2022-06-07 | Integrated rapid construction method for raft, water collecting well and elevator shaft of deep foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210636625.1A CN115030205B (en) | 2022-06-07 | Integrated rapid construction method for raft, water collecting well and elevator shaft of deep foundation pit |
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| Publication Number | Publication Date |
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| CN115030205A true CN115030205A (en) | 2022-09-09 |
| CN115030205B CN115030205B (en) | 2024-04-26 |
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|---|---|---|---|---|
| CN105970988A (en) * | 2016-06-08 | 2016-09-28 | 中国建筑第八工程局有限公司 | Construction method for installing elevator shaft side wall rebars in raft foundation |
| CN106638645A (en) * | 2016-12-29 | 2017-05-10 | 上海建工四建集团有限公司 | Layering prefabricated structure and building method of basement bottom board water collection pit reinforcing mesh |
| CN110219313A (en) * | 2019-06-05 | 2019-09-10 | 中国五冶集团有限公司 | A kind of underground construction blind shaft drainage system and construction method |
| CN111622256A (en) * | 2020-06-30 | 2020-09-04 | 安徽省第二建筑工程有限公司 | Integrated forming method for tower crane foundation in raft foundation |
| KR20210016169A (en) * | 2019-08-01 | 2021-02-15 | 효성중공업 주식회사 | Steel pit structure for elevator |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970988A (en) * | 2016-06-08 | 2016-09-28 | 中国建筑第八工程局有限公司 | Construction method for installing elevator shaft side wall rebars in raft foundation |
| CN106638645A (en) * | 2016-12-29 | 2017-05-10 | 上海建工四建集团有限公司 | Layering prefabricated structure and building method of basement bottom board water collection pit reinforcing mesh |
| CN110219313A (en) * | 2019-06-05 | 2019-09-10 | 中国五冶集团有限公司 | A kind of underground construction blind shaft drainage system and construction method |
| KR20210016169A (en) * | 2019-08-01 | 2021-02-15 | 효성중공업 주식회사 | Steel pit structure for elevator |
| CN111622256A (en) * | 2020-06-30 | 2020-09-04 | 安徽省第二建筑工程有限公司 | Integrated forming method for tower crane foundation in raft foundation |
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