CN115030205B - Integrated rapid construction method for raft, water collecting well and elevator shaft of deep foundation pit - Google Patents
Integrated rapid construction method for raft, water collecting well and elevator shaft of deep foundation pit Download PDFInfo
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- CN115030205B CN115030205B CN202210636625.1A CN202210636625A CN115030205B CN 115030205 B CN115030205 B CN 115030205B CN 202210636625 A CN202210636625 A CN 202210636625A CN 115030205 B CN115030205 B CN 115030205B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 153
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 149
- 239000010959 steel Substances 0.000 claims abstract description 149
- 239000004567 concrete Substances 0.000 claims abstract description 71
- 239000002689 soil Substances 0.000 claims abstract description 39
- 230000002787 reinforcement Effects 0.000 claims abstract description 38
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 85
- 230000003014 reinforcing effect Effects 0.000 claims description 61
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 239000011178 precast concrete Substances 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002396 Polyurea Polymers 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 24
- 239000011449 brick Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/22—Lining sumps in trenches or other foundation pits
-
- 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
-
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a rapid construction method for integration of a deep foundation pit raft, a water collecting well and an elevator shaft, which comprises the following steps: digging a local pit of the elevator shaft of the water collecting well at the upper part of the soil body at the bottom of the foundation pit of the cement mixing pile, and arranging side slopes around the inside of the local pit of the elevator shaft of the water collecting well; paving a concrete cushion layer; a waterproof structure is paved on the concrete cushion layer, and raft steel bars are arranged on the waterproof structure; installing foundation column dowel bars at the position of a raft pre-pouring belt, installing galvanized reinforcement flowing nets at two sides of the raft post-pouring belt, installing a foundation water collecting well elevator shaft inner template system in a water collecting well elevator shaft local pit, and pouring raft concrete to form a reinforced concrete foundation; removing a template system in the basic water collecting well elevator shaft to form the water collecting well elevator shaft; and pouring concrete at the post-pouring zone of the raft to form a post-pouring zone 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 rapid construction method for integration of a raft plate, a water collecting well and an elevator shaft of a deep foundation pit.
Background
When constructing the elevator shaft of the raft plate water collecting well of the deep foundation pit of the building, the general construction steps are as follows: building a building envelope, reinforcing a foundation pit bottom, carrying out earth excavation, carrying out secondary earth excavation on deep falling parts such as a water collecting well elevator shaft bearing platform, manually repairing the bottom, repairing a side slope, carrying out brick and table membrane masonry construction, carrying out brick and table membrane plastering, carrying out waterproof coiled material construction, carrying out waterproof protection layer construction, carrying out water collecting well elevator shaft bearing platform and other deep falling parts, binding lower reinforcing steel bars of a raft plate, carrying out non-perforated force transmission belt installation, carrying out field binding on upper raft plate reinforcing steel bars, carrying out ampere post pouring of water stopping steel plates of the belt parts, carrying out post pouring with position template installation, carrying out column wall dowel bar installation, carrying out water collecting well elevator shaft template installation, and carrying out raft plate concrete pouring.
The method needs a large amount of brick table films and needs to be painted, the construction period is long, and the construction synchronization is longer when the construction is influenced by rainy seasons; the waterproof layer construction needs to be carried out when the base layer is dried, the waiting time is long, and the protection layer construction is carried out after the waterproof layer construction; the reinforcement bar binding of the raft collecting well elevator shaft adopts site manual binding, a large number of reinforcement bar operators are needed in site time, the prefabrication degree is low, and the construction speed is low; the conventional post-pouring belt force-transmitting belt is not provided with air holes, so that the post-pouring belt is easy to vibrate and is not compact, empty and poor in water stopping effect; the post-cast strip is not communicated with the lift shaft of the water collecting well during the empty period, and when in rainy days or concrete maintenance, water is always arranged in the post-cast strip, steel bars are corroded, the civilized construction is poor, and potential safety hazards are easy to generate; the foundation pit is excavated to the raft pouring is completed, the time period of use is long, and the foundation pit is exposed for a long time and is not closed, so that the safety of the foundation pit is not facilitated. The method has the defects of high cost, long construction period, adverse safety management and the like.
Disclosure of Invention
According to the defects of the prior art, the invention provides the integrated rapid construction method for the raft, the water collecting well and the elevator shaft of the deep foundation pit, and the integrated rapid construction of the raft, the water collecting well and the elevator shaft of the deep foundation pit is realized by improving the construction method.
The invention is realized by the following technical scheme:
the integrated rapid construction method for the raft, the water collecting well and the elevator shaft of the deep foundation pit is characterized by comprising the following steps of:
a. Digging a foundation pit and reinforcing a soil body below the bottom of the foundation pit to form a soil body at the bottom of a cement-soil stirring pile foundation pit, digging a water collecting well elevator shaft local pit at the upper part of the soil body at the bottom of the cement-soil stirring pile foundation pit, and arranging side slopes around the inside of the water collecting well elevator shaft local pit;
b. Paving a concrete cushion layer on the upper part of the soil body at the bottom of the foundation pit of the cement soil mixing pile, the bottom of the local deep pit of the elevator shaft of the water collecting well and the side slope;
c. A waterproof structure is paved on the concrete cushion layer, and raft steel bars are arranged on the waterproof structure;
d. installing foundation column dowel bars at the position of a raft pre-pouring belt, installing galvanized reinforcement flowing nets at two sides of the raft post-pouring belt, installing a foundation water collecting well elevator shaft inner template system in a local pit of the water collecting well elevator shaft, and pouring raft concrete to form a reinforced concrete foundation; ; removing the template system in the basic water collecting well elevator shaft to form a water collecting well elevator shaft;
e. and pouring concrete at the post-pouring zone of the raft to form a post-pouring zone concrete structure.
The raft steel bars comprise prefabricated water collecting well elevator well bottom U-shaped steel bar meshes, prefabricated water collecting well elevator well side wall steel bar meshes, prefabricated raft bottom steel bar meshes and prefabricated water collecting well upper layer steel bar-well wall vertical steel bar integrated steel bar meshes, wherein the prefabricated water collecting well elevator well bottom U-shaped steel bar meshes are installed in a water collecting well elevator well local deep pit, the prefabricated water collecting well elevator well side wall steel bar meshes are installed on the prefabricated water collecting well elevator well bottom U-shaped steel bar meshes, and the prefabricated raft bottom steel bar meshes are installed on a waterproof structure on the upper part of a cement soil stirring pile foundation pit bottom soil body and are connected with the prefabricated water collecting well elevator well bottom U-shaped steel bar meshes; the steel mesh sheet at the bottom of the prefabricated raft is provided with a section steel combined force transfer belt and a steel guide pipe at the position of the raft post-pouring belt, a post-pouring horizontal steel water stop belt is connected between the section steel combined force transfer belts, and one end of the steel guide pipe extends into a local pit of the elevator shaft of the water collecting well; and the prefabricated raft plate upper layer rib-well wall side wall vertical rib integrated reinforcing mesh is arranged on the profile steel combined force transmission belt.
The concrete cushion layer at the upper part of the soil body at the bottom of the cement-soil stirring pile foundation pit is formed by pouring concrete at the upper part of the soil body at the bottom of the cement-soil stirring pile foundation pit; the concrete cushion layer at the bottom of the local pit of the water collecting well elevator shaft is formed by pouring concrete at the bottom of the local pit of the water collecting well elevator shaft or paving a precast concrete pit cushion layer at the bottom of the local pit of the water collecting well elevator shaft; the concrete cushion layer on the side slope is formed by paving a plastic grid net on the side slope and pouring concrete on the plastic grid net or paving a precast concrete side slope cushion layer on the side slope.
The waterproof structure consists of a waterproof layer and a fine stone concrete waterproof protective layer paved on the waterproof layer, or consists of an anti-adhesion waterproof coiled material; the waterproof layer is one of a urine-collecting waterproof layer, a polyurethane waterproof layer and a reverse-adhesion waterproof layer.
The U-shaped reinforced net piece at the bottom of the prefabricated water collecting well elevator well is an inverted ladder-shaped reinforced net piece, and the shape and the size of the U-shaped reinforced net piece are respectively matched with the shape and the size of the local pit of the water collecting well elevator well; the U-shaped steel bar meshes at the bottom of the prefabricated water collecting well elevator well comprise four side steel bar meshes and one bottom steel bar mesh, the bottom steel bar mesh is arranged at the bottom of a space formed by enclosing the four side steel bar meshes and is connected with the four side steel bar meshes, and the upper parts of the four side steel bar meshes extend to the outside of the local pit of the water collecting well elevator 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 sheet is a well-shaped reinforcing steel bar net sheet with a bottom and comprises water collecting well elevator bottom upper transverse reinforcing steel bars, water collecting well elevator bottom upper longitudinal reinforcing steel bars, water collecting well elevator shaft side wall transverse reinforcing steel bars and water collecting well elevator shaft side wall longitudinal reinforcing steel bars;
the prefabricated raft bottom reinforcing mesh is a ring-shaped reinforcing mesh, the inner ring of the ring-shaped reinforcing mesh is connected with the upper part of the U-shaped reinforcing mesh at the bottom of the elevator shaft of the prefabricated water collecting well, and the prefabricated raft bottom reinforcing mesh comprises raft bottom transverse long reinforcing bars, raft bottom transverse short reinforcing bars, raft bottom longitudinal long reinforcing bars and raft bottom longitudinal short reinforcing bars;
the section steel combined force transmission belt comprises four side plates and a middle plate, wherein the middle plate is arranged in the middle of a space formed by encircling the four side plates and is connected with the four side plates, and a plurality of vent holes are formed in the middle plate;
the rear pouring belt horizontal steel bar water stop belt comprises two steel water stop steel plates with turning angles, and the two steel water stop steel plates are respectively arranged on two sides of the section steel combined force transmission belt;
the prefabricated raft upper layer reinforcement-well wall side wall vertical reinforcement integrated reinforcement mesh comprises an annular reinforcement mesh structure and a square tubular reinforcement mesh structure connected with the annular reinforcement mesh structure in an inner ring, wherein the annular reinforcement mesh structure comprises raft upper layer transverse long reinforcement, raft upper layer transverse short reinforcement, raft upper layer longitudinal long reinforcement and raft upper layer longitudinal short reinforcement, and the square tubular reinforcement mesh structure is installed in the prefabricated water collecting well elevator well side wall reinforcement mesh.
The foundation column dowel bar is connected with the raft steel bar, and the foundation column dowel bar comprises a column or wall dowel bar and an internal positioning stirrup.
The foundation water collecting well elevator shaft inner template system is arranged in the square tubular reinforced net structure of the prefabricated raft plate upper layer rib-well wall vertical rib integrated reinforced net, and comprises a water collecting well elevator shaft inner template 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; the construction method has the advantages of high construction speed, no need of brick bench formwork, high prefabrication degree of reinforcement, assembly type hoisting installation of reinforcement installation, convenient operation, short whole construction period from earth excavation to raft pouring, great significance for safety guarantee of deep foundation pit and cost saving.
Drawings
FIG. 1 is a schematic view of the construction structure of the present invention;
FIG. 2 is a schematic diagram of a foundation pit bottom soil body structure of the cement mixing pile;
FIG. 3 is a schematic illustration of the partial drop pit installation of the sump elevator hoistway of the present invention;
FIG. 4 is a schematic view of a concrete cushion structure according to the present invention;
FIG. 5 is a schematic view of the installation of a concrete bedding of the present invention (II);
FIG. 6 is a schematic view of the waterproof layer installation of the present invention;
Fig. 7 is a schematic view of the installation of the reverse-adhesive waterproof roll of the present invention;
FIG. 8 is a schematic view of the installation of the waterproof protective layer of the fine stone concrete of the present invention;
FIG. 9 is a schematic view of the structure of the U-shaped reinforced mesh at the bottom of the elevator shaft of the prefabricated water collecting well;
FIG. 10 is a schematic view of the installation of U-shaped reinforcing mesh at the bottom of an elevator shaft of a prefabricated water collection well;
FIG. 11 is a schematic view of a prefabricated water collection well elevator shaft side wall reinforcing mesh structure according to the invention;
FIG. 12 is a schematic view of the installation of a reinforcement mesh on the side wall of a prefabricated water collection well elevator shaft according to the invention;
fig. 13 is a schematic view of a bottom reinforcing mesh structure of a prefabricated raft according to the present invention;
fig. 14 is a schematic view of the installation of a mesh sheet of reinforcement at the bottom of a prefabricated raft according to the present invention;
FIG. 15 is a schematic view of the assembled force-transmitting belt of the section steel of the present invention;
FIG. 16 is a schematic view of the installation of the steel composite force-transmitting belt of the present invention;
FIG. 17 is a schematic view of the installation of a steel conduit according to the present invention;
FIG. 18 is a schematic view of a steel conduit installation tube (II) according to the present invention;
FIG. 19 is a schematic view (I) of the installation of a horizontal reinforced water stop with pouring strips after the invention;
FIG. 20 is a schematic view (II) of the installation of a horizontal reinforced water stop with pouring strips after the invention;
fig. 21 is a schematic diagram of a prefabricated raft upper layer rib-wall vertical rib integrated reinforcing mesh structure;
Fig. 22 is a schematic diagram of installing a reinforcement mesh with integrated upper layer ribs of a prefabricated raft and vertical ribs on the side wall of a well wall;
FIG. 23 is a schematic view of a foundation column dowel bar installation of the present invention;
FIG. 24 is a schematic view of the installation of a galvanized tendon network of the present invention;
FIG. 25 is a schematic view of a raft concrete casting according to the present invention;
fig. 26 is a schematic diagram of the installation of a template system in an elevator hoistway of a foundation pit of the present invention.
Detailed Description
The features of the invention and other related features are described in further detail below by way of example in conjunction with the following figures to facilitate understanding by those skilled in the art:
1-26, wherein marks 1-13 respectively represent a soil body 1 at the bottom of a foundation pit of a cement-soil mixing pile, a local pit 101 of an elevator shaft of a water collecting well and a side slope 102; concrete cushion layer 2, plastic grid mesh 201, plastic grid 201-1, concrete slope cushion layer 202, concrete pit cushion layer 203, concrete foundation pit cushion layer 204, precast concrete slope cushion layer 205, precast concrete pit cushion layer 206; waterproof layer 3, anti-adhesive waterproof roll 301; a fine stone concrete waterproof protective layer 4; the prefabricated water collecting well elevator shaft bottom U-shaped steel bar net sheet 501, the first U-shaped steel bar 501-1, the second U-shaped steel bar 501-2, the prefabricated water collecting well elevator shaft side wall steel bar net sheet 502, the water collecting well elevator bottom upper transverse steel bar 502-1, the water collecting well elevator bottom upper longitudinal steel bar 502-2, the water collecting well elevator shaft side wall transverse steel bar 502-3, the water collecting well elevator shaft side wall longitudinal steel bar 502-4, the prefabricated raft bottom steel bar net sheet 503, the raft lower transverse long steel bar 503-1, the raft lower transverse short steel bar 503-2, the raft lower longitudinal long steel bar 503-3, the raft lower longitudinal short steel bar 503-4, the prefabricated raft upper layer steel bar-well wall vertical steel bar net sheet 504, the raft upper transverse short steel bar 504-2, the raft upper longitudinal long steel bar 504-3, the raft upper longitudinal short steel bar 504-4 and the raft concrete 505; the steel section combined force transmission belt 6, a left square steel end plate 601, a right square steel end plate 602, a front rectangular steel plate 603, a rear rectangular steel plate 604, a middle steel plate 605 and a vent 605-1; a steel conduit 7; pouring a horizontal reinforced water stop belt 8 and a steel water stop steel plate 801; a galvanized rib net 9; a foundation column dowel bar 10; a base sump elevator shaft inner template system 11; a sump elevator shaft 12; raft post-cast strip 13.
Examples: as shown in fig. 1-26, the embodiment relates to an integrated rapid construction method for a raft board, a water collecting well and an elevator shaft of a deep foundation pit, which comprises the following steps:
a. As shown in fig. 1-3, a foundation pit is excavated, soil below the bottom of the foundation pit is reinforced to form a soil body 1 at the bottom of the foundation pit, a water collecting well elevator shaft local pit 101 is excavated at the upper part of the soil body 1 at the bottom of the foundation pit of the cement stirring pile, and side slopes 102 are arranged around the inside of the water collecting well elevator shaft local pit 101.
B. And a concrete cushion layer 2 is paved on the upper part of the soil body 1 at the bottom of the foundation pit of the cement mixing pile, the bottom of the local pit 101 of the elevator shaft of the water collecting well and the side slope 102.
The concrete cushion layer 2 at the upper part of the soil body 1 at the bottom of the cement-soil stirring pile foundation pit is formed by pouring concrete at the upper part of the soil body 1 at the bottom of the cement-soil stirring pile foundation pit (a concrete foundation pit cushion layer 204 can be formed); the concrete cushion layer 2 at the bottom of the local pit 101 of the water collecting well elevator shaft is formed by pouring concrete (a concrete pit cushion layer 203 can be formed) at the bottom of the local pit 101 of the water collecting well elevator shaft or paving a precast concrete pit cushion layer 206 at the bottom of the local pit 101 of the water collecting well elevator shaft; the concrete cushion 2 on the side slope 102 is formed by laying a plastic grid 201 on the side slope 102 and pouring concrete on the plastic grid 201 (a concrete side slope cushion 202 can be formed with the plastic grid 201 in the middle of the concrete side slope cushion 202) or laying a precast concrete side slope cushion 205 on the side slope 102, wherein the plastic grid 201 is composed of a plurality of plastic grids 201-1, and the plastic grid 201 can prevent concrete from falling down.
C. a waterproof structure is laid on the concrete cushion layer 2, and raft reinforcing bars are installed on the waterproof structure.
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 a anti-adhesion waterproof layer. The waterproof layer 3 is paved with the fine stone concrete waterproof layer 4, so that the waterproof layer 3 is prevented from being damaged in the subsequent raft reinforcement construction. As shown in fig. 7, the anti-adhesion type waterproof roll 301 may be laid on the concrete cushion layer 2, and the raft reinforcement may be directly laid on the surface of the anti-adhesion type waterproof roll 301, so that the need of pouring the fine stone concrete waterproof protection layer 4 on the surface of the waterproof layer 3 may be eliminated.
In addition, the raft steel bars comprise a prefabricated water collecting well elevator well bottom U-shaped steel bar net piece 501, a prefabricated water collecting well elevator well side wall steel bar net piece 502, a prefabricated raft bottom steel bar net piece 503 and a prefabricated water collecting raft upper layer steel bar-well wall vertical steel bar integrated steel bar net piece 504, as shown in fig. 9-10, the prefabricated water collecting well elevator well bottom U-shaped steel bar net piece 501 is arranged in a water collecting well elevator well local pit 101, wherein the prefabricated water collecting well elevator well bottom U-shaped steel bar net piece 501 is an inverted ladder type steel bar net piece, and the shape and the size of the U-shaped steel bar net piece are respectively matched with the shape and the size of the water collecting well elevator well local pit 101; the U-shaped steel bar meshes 501 at the bottom of the prefabricated water collecting well elevator well comprise four side steel bar meshes and a bottom steel bar mesh, the bottom steel bar mesh is arranged at the bottom of a space formed by enclosing the four side steel bar meshes and is connected with the four side steel bar meshes, and the upper parts of the four side steel bar meshes extend to the outside of a local pit of the water collecting well elevator well; the side reinforcing steel bar meshes comprise a plurality of first U-shaped reinforcing steel bars 501-1 which are arranged in the same length and in the transverse direction or the longitudinal direction, and a plurality of second U-shaped reinforcing steel bars 501-2 which are arranged at two sides of the first U-shaped reinforcing steel bars 501-1 and are in proportion to each other in the transverse direction or the longitudinal direction, and the side reinforcing steel bar meshes are connected together through the connection of the second U-shaped reinforcing steel bars 501-2. As shown in fig. 11-12, the prefabricated water-collecting well elevator shaft side wall reinforcing mesh 502 is mounted on the U-shaped reinforcing mesh 501 at the bottom of the prefabricated water-collecting well elevator shaft, wherein the prefabricated water-collecting well elevator shaft side wall reinforcing mesh 502 is a bottom-carrying inverted-U-shaped reinforcing mesh, and comprises a water-collecting well elevator bottom upper transverse reinforcing bar 502-1, a water-collecting well elevator bottom upper longitudinal reinforcing bar 502-2, a water-collecting well elevator shaft side wall transverse reinforcing bar 502-3 and a water-collecting well elevator shaft side wall longitudinal reinforcing bar 504. As shown in fig. 13-14, the prefabricated raft bottom reinforcing mesh 503 is installed on the fine stone concrete waterproof protective layer 4 (or the reverse-adhesion waterproof coiled material 301) at the upper part of the soil body 1 at the bottom of the foundation pit of the cement mixing pile and is connected with the U-shaped reinforcing mesh 501 at the bottom of the elevator shaft of the prefabricated water collecting well, wherein the prefabricated raft bottom reinforcing mesh 503 is a ring-shaped reinforcing mesh and the inner ring of the prefabricated raft bottom reinforcing mesh is connected with the upper part of the U-shaped reinforcing mesh 501 at the bottom of the elevator shaft of the prefabricated water collecting well, and the prefabricated raft bottom reinforcing mesh 503 comprises a raft bottom transverse long reinforcing bar 503-1, a raft bottom transverse short reinforcing bar 503-2, a raft bottom longitudinal long reinforcing bar 503-3 and a raft bottom longitudinal short reinforcing bar 503-4. The prefabricated raft bottom reinforcing mesh 503 is provided with a steel composite force-transmitting belt 6 and a steel guide pipe 7 at the position of a raft post-pouring belt 13, a rear pouring belt horizontal reinforcing water stop belt 8 is connected between the steel composite force-transmitting belt 6, one end of the steel guide pipe 7 extends into a water collecting well elevator shaft local pit 101, wherein, as shown in fig. 15-16, the steel composite force-transmitting belt 6 comprises four side plates (a left square steel end plate 601, a right square steel end plate 602, a front square steel plate 603 and a rear square steel plate 604) and a middle steel plate 605, the middle steel plate 605 is arranged in the middle of a space formed by surrounding the four side plates and is connected with the four side plates, a plurality of vent holes 605-1 (the diameter is larger than 60 mm) are formed in the middle steel plate 605, when the vent holes 605-1 are used as pouring post-pouring belt concrete, the sealing of the left, right, front and back and middle steel plates are prevented from being unable to vibrate tightly, the effect of ventilation and air entraining is achieved, in addition, the steel composite force-transmitting belt 6 is arranged at equal intervals, the whole force transmission of two side forces is achieved, the whole force transmission of the whole concrete blocks is transmitted to the large foundation pit is ensured, and the whole force-bearing wall of the whole partition blocks is ensured; 17-18, the steel guide pipe 7 is provided with a certain gradient and is used for connecting the raft post-pouring belt 13 and the water collecting well elevator shaft 12, so that the water accumulated in the post-pouring belt is automatically discharged into the water collecting well elevator shaft during the whole building structure construction period before the concrete pouring of the post-pouring belt is ensured, and the water accumulated in the foundation pit is ensured to be free of water accumulated by a drainage pump arranged in the water collecting well; as shown in fig. 19-20, the post-pouring horizontal steel bar water stop belt 8 comprises two steel water stop steel plates 801 with upturned corners, the two steel water stop steel plates 801 are respectively arranged on two sides of the profile steel combined force transmission belt 6, wherein one half of the steel water stop steel plates 801 are poured in a pre-pouring raft foundation, and the other half of the steel water stop steel plates are poured in post-pouring belt concrete, so that the water stop effect of the reinforced concrete raft is achieved. As shown in fig. 21-22, the prefabricated raft upper layer rib-wall vertical rib integrated reinforcing mesh 504 is installed on the profile steel combined force transmission belt 8, wherein the prefabricated raft upper layer rib-wall vertical rib integrated reinforcing mesh 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 layer transverse long reinforcing bars 504-1, raft upper layer transverse short reinforcing bars 504-2, raft upper layer longitudinal long reinforcing bars 504-3 and raft upper layer longitudinal short reinforcing bars 504-4, and the square tubular reinforcing mesh structure is installed in the prefabricated water collecting well elevator shaft side wall reinforcing mesh 502.
D. Installing foundation column dowel bars 10 at the position of a raft pre-cast strip, wherein the foundation column dowel bars 10 are connected with raft steel bars, and the foundation column dowel bars 10 comprise column or wall dowel bars and internal positioning stirrups, and form frame columns or walls through binding; galvanized steel bar flowing nets 9 are arranged on two sides of the raft post-pouring strip 13, and rough joint surfaces can be formed and used for intercepting the pre-poured raft concrete from flowing into the raft post-pouring strip 13; installing a basic water collecting well elevator shaft inner template system 11 in a water collecting well elevator shaft local pit 101 (in a square tubular reinforced mesh structure of a prefabricated raft plate upper layer rib-well wall vertical rib integrated reinforced mesh 504), wherein the basic water collecting well elevator shaft inner template system 11 comprises a water collecting well elevator shaft inner template and a framework system; pouring raft concrete 505 to form a reinforced concrete foundation 5; the foundation pit elevator shaft inner template system 11 is removed, and a pit elevator shaft 12 can be formed.
E. And pouring concrete at the post-cast strip 13 of the raft to form a post-cast strip concrete structure. The post-cast strip concrete structure is formed by post-cast strip concrete and raft steel bars, specifically, after the post-cast strip 13 of the raft meets the requirements of the main structure capping and the design determining time, the post-cast strip 13 of the raft is subjected to concrete pouring (the concrete has the characteristics of no shrinkage and micro expansion).
In summary, in the embodiment, the integrated rapid construction of the raft, the water collecting well and the elevator shaft for the deep foundation pit is realized; the construction method has the advantages of high construction speed, no need of brick bench formwork, high prefabrication degree of reinforcement, assembly type hoisting installation of reinforcement installation, convenient operation, short whole construction period from earth excavation to raft pouring, great significance for safety guarantee of deep foundation pit and cost saving.
Although the foregoing embodiments have been described in some detail with reference to the accompanying drawings, it will be appreciated by those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the invention as defined in the appended claims, and thus are not repeated herein.
Claims (5)
1. The integrated rapid construction method for the raft, the water collecting well and the elevator shaft of the deep foundation pit is characterized by comprising the following steps of:
a. Digging a foundation pit and reinforcing a soil body below the bottom of the foundation pit to form a soil body at the bottom of a cement-soil stirring pile foundation pit, digging a water collecting well elevator shaft local pit at the upper part of the soil body at the bottom of the cement-soil stirring pile foundation pit, and arranging side slopes around the inside of the water collecting well elevator shaft local pit;
b. a concrete cushion layer is paved on the upper part of the soil body at the bottom of the foundation pit of the cement soil mixing pile, the bottom of the local deep pit of the elevator shaft of the water collecting well and the side slope;
c. Paving a waterproof structure on the concrete cushion layer, and installing raft reinforcing steel bars on the waterproof structure;
d. Installing foundation column dowel bars at the position of a raft pre-pouring belt, installing galvanized reinforcement flowing nets at two sides of the raft post-pouring belt, installing a foundation water collecting well elevator shaft inner template system in a local pit of the water collecting well elevator shaft, and pouring raft concrete to form a reinforced concrete foundation; removing the template system in the basic water collecting well elevator shaft to form a water collecting well elevator shaft;
e. pouring concrete at the post-pouring zone of the raft to form a post-pouring zone concrete structure;
The raft steel bars comprise prefabricated water collecting well elevator well bottom U-shaped steel bar meshes, prefabricated water collecting well elevator well side wall steel bar meshes, prefabricated raft bottom steel bar meshes and prefabricated water collecting well upper layer steel bar-well wall vertical steel bar integrated steel bar meshes, wherein the prefabricated water collecting well elevator well bottom U-shaped steel bar meshes are installed in a water collecting well elevator well local deep pit, the prefabricated water collecting well elevator well side wall steel bar meshes are installed on the prefabricated water collecting well elevator well bottom U-shaped steel bar meshes, and the prefabricated raft bottom steel bar meshes are installed on a waterproof structure on the upper part of a cement soil stirring pile foundation pit bottom soil body and are connected with the prefabricated water collecting well elevator well bottom U-shaped steel bar meshes; the steel mesh sheet at the bottom of the prefabricated raft is provided with a section steel combined force transfer belt and a steel guide pipe at the position of the raft post-pouring belt, a post-pouring horizontal steel water stop belt is connected between the section steel combined force transfer belts, and one end of the steel guide pipe extends into a local pit of the elevator shaft of the water collecting well; the prefabricated raft plate upper layer rib-well wall side wall vertical rib integrated reinforcing mesh is arranged on the profile steel combined force transmission belt;
The U-shaped reinforced net piece at the bottom of the prefabricated water collecting well elevator well is an inverted ladder-shaped reinforced net piece, and the shape and the size of the U-shaped reinforced net piece are respectively matched with the shape and the size of the local pit of the water collecting well elevator well; the U-shaped steel bar meshes at the bottom of the prefabricated water collecting well elevator well comprise four side steel bar meshes and one bottom steel bar mesh, the bottom steel bar mesh is arranged at the bottom of a space formed by enclosing the four side steel bar meshes and is connected with the four side steel bar meshes, and the upper parts of the four side steel bar meshes extend to the outside of the local pit of the water collecting well elevator 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 sheet is a well-shaped reinforcing steel bar net sheet with a bottom and comprises water collecting well elevator bottom upper transverse reinforcing steel bars, water collecting well elevator bottom upper longitudinal reinforcing steel bars, water collecting well elevator shaft side wall transverse reinforcing steel bars and water collecting well elevator shaft side wall longitudinal reinforcing steel bars;
the prefabricated raft bottom reinforcing mesh is a ring-shaped reinforcing mesh, the inner ring of the ring-shaped reinforcing mesh is connected with the upper part of the U-shaped reinforcing mesh at the bottom of the elevator shaft of the prefabricated water collecting well, and the prefabricated raft bottom reinforcing mesh comprises raft bottom transverse long reinforcing bars, raft bottom transverse short reinforcing bars, raft bottom longitudinal long reinforcing bars and raft bottom longitudinal short reinforcing bars;
the section steel combined force transmission belt comprises four side plates and a middle plate, wherein the middle plate is arranged in the middle of a space formed by encircling the four side plates and is connected with the four side plates, and a plurality of vent holes are formed in the middle plate;
the rear pouring belt horizontal steel bar water stop belt comprises two steel water stop steel plates with turning angles, and the two steel water stop steel plates are respectively arranged on two sides of the section steel combined force transmission belt;
the prefabricated raft upper layer reinforcement-well wall side wall vertical reinforcement integrated reinforcement mesh comprises an annular reinforcement mesh structure and a square tubular reinforcement mesh structure connected with the annular reinforcement mesh structure in an inner ring, wherein the annular reinforcement mesh structure comprises raft upper layer transverse long reinforcement, raft upper layer transverse short reinforcement, raft upper layer longitudinal long reinforcement and raft upper layer longitudinal short reinforcement, and the square tubular reinforcement mesh structure is installed in the prefabricated water collecting well elevator well side wall reinforcement mesh.
2. The integrated rapid construction method for the raft, the water collecting well and the elevator shaft of the deep foundation pit as claimed in claim 1, wherein the integrated rapid construction method comprises the following steps: the concrete cushion layer at the upper part of the soil body at the bottom of the cement-soil stirring pile foundation pit is formed by pouring concrete at the upper part of the soil body at the bottom of the cement-soil stirring pile foundation pit; the concrete cushion layer at the bottom of the local pit of the water collecting well elevator shaft is formed by pouring concrete at the bottom of the local pit of the water collecting well elevator shaft or paving a precast concrete pit cushion layer at the bottom of the local pit of the water collecting well elevator shaft; the concrete cushion layer on the side slope is formed by paving a plastic grid net on the side slope and pouring concrete on the plastic grid net or paving a precast concrete side slope cushion layer on the side slope.
3. The integrated rapid construction method for the raft, the water collecting well and the elevator shaft of the deep foundation pit as claimed in claim 1, wherein the integrated rapid construction method comprises the following steps: the waterproof structure consists of a waterproof layer and a fine stone concrete waterproof protective layer paved on the waterproof layer, or consists of an anti-adhesion waterproof coiled material; the waterproof layer is one of a polyurea waterproof layer, a polyurethane waterproof layer and an anti-adhesion waterproof layer.
4. The integrated rapid construction method for the raft, the water collecting well and the elevator shaft of the deep foundation pit as claimed in claim 1, wherein the integrated rapid construction method comprises the following steps: the foundation column dowel bar is connected with the raft steel bar, and the foundation column dowel bar comprises a column or wall dowel bar and an internal positioning stirrup.
5. The integrated rapid construction method for the raft, the water collecting well and the elevator shaft of the deep foundation pit as claimed in claim 1, wherein the integrated rapid construction method comprises the following steps: the foundation water collecting well elevator shaft inner template system is arranged in the square tubular reinforced net structure of the prefabricated raft plate upper layer rib-well wall vertical rib integrated reinforced net, and comprises a water collecting well elevator shaft inner template and a framework system.
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| CN202210636625.1A CN115030205B (en) | 2022-06-07 | 2022-06-07 | Integrated rapid construction method for raft, water collecting well and elevator shaft of deep foundation pit |
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| CN202210636625.1A CN115030205B (en) | 2022-06-07 | 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 | Priority date | Publication date | Assignee | Title |
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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 |
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2022
- 2022-06-07 CN CN202210636625.1A patent/CN115030205B/en active Active
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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