CN114182757A - Full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure and construction method - Google Patents

Abstract

The full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure comprises a bottom layer pipe gallery, an earth-facing side wall, a middle plate, a top plate and a PEC beam; the bottom-layer pipe gallery is formed by splicing a plurality of reinforced concrete pipe gallery precast blocks, the soil-facing side wall is formed by splicing a plurality of combined side wall plates, each combined side wall plate comprises a reinforced concrete plate and an H-shaped steel column, the bottom of each H-shaped steel column is connected with a channel steel connecting piece pre-embedded in the top surface of each reinforced concrete pipe gallery precast block, and a PEC beam is rigidly connected between the top ends of every two H-shaped steel columns which are spaced at the same side; the medium plate is formed by the concatenation of polylith combination medium plate, and the roof is formed by the concatenation of polylith combination roof, all includes reinforced concrete board and girder steel, and the girder steel is connected equally by force with the short beam joint on the H shaped steel post. Compared with the common fully prefabricated assembled concrete structural member, the invention has remarkable progress in design, construction, operation and maintenance, and has remarkable social benefit, economic and environmental benefit and popularization value.

Description

Full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure and construction method

Technical Field

The invention belongs to the technical field of municipal engineering, relates to an underground structure, and particularly relates to a full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure.

Background

At present, city underground space development adopts the central region underground space to concentrate the construction, and the development mode of peripheral underground space independent construction exists municipal administration, the many facilities collineations of traffic in the red line within range, and the vertical range upon range of structure, the horizontal interconnection's of underground space condition of intercommunication adopts the structure of co-structure, can realize the integration construction of collineation facility, share the basis, intensive space improves the construction benefit, also can be for unmanned logistics sanitation reservation condition.

The existing assembly type underground structure is mainly of a full reinforced concrete structure, a full-prefabricated assembly connection mode or an overlapping structure mode is adopted, the overlapping structure is low in prefabrication rate, post-cast concrete is more, the advantages of construction, construction period, construction cost, environmental effect and the like are not obvious, the full-prefabricated reinforced concrete members are large in general size, heavy in weight, high in transportation cost and even difficult to transport, the field hoisting process is complex, the equipment requirement is high, the different section stress change differences of the same member are large, the transverse joint cuts off the connection of the main stress members, the influence of the connection structure and the connection parts on the overall rigidity needs to be considered when the main structure is stressed, the cost of acquiring parameters through experiment and simulation calculation is high, the design calculation is complex, the accuracy is low, and the waterproof performance is also influenced by the stress characteristics of the main structure. Therefore, the research on a novel fully-assembled underground structure system with light weight, small size, low transportation cost and convenient construction and installation is an important direction for the development of future underground engineering.

Disclosure of Invention

The invention aims at the problems and provides a full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure.

The purpose of the invention can be realized by the following technical scheme: a full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure comprises a bottom layer pipe gallery, an earth-facing side wall, a middle plate, a top plate and a PEC beam; the bottom-layer pipe gallery is formed by assembling a plurality of reinforced concrete pipe gallery prefabricated blocks, two adjacent reinforced concrete pipe gallery prefabricated blocks are connected through a longitudinal joint, and the top surfaces of the reinforced concrete pipe gallery prefabricated blocks are provided with channel steel connecting pieces; the soil-facing side wall is formed by splicing a plurality of combined side wall plates, each combined side wall plate comprises a reinforced concrete plate and an H-shaped steel column fixed on the reinforced concrete plate through shear-resistant studs, each H-shaped steel column is provided with a short beam joint for mounting a middle plate and a top plate, the bottom of each H-shaped steel column is connected with a channel steel connecting piece on the top surface of a reinforced concrete pipe gallery prefabricated block, and a PEC beam is rigidly connected between the top ends of every two spaced H-shaped steel columns on the same side; the medium plate is formed by the concatenation of polylith combination medium plate, the roof is formed by the concatenation of polylith combination roof, combination medium plate and combination roof all include reinforced concrete board and are fixed in the girder steel on reinforced concrete board through shear bolt nail, and the girder steel all adopts equal strong the connection with the short beam joint on the H shaped steel post.

Further, the longitudinal joint between the prefabricated blocks of the reinforced concrete pipe gallery comprises a tenon and pre-stressed finish-rolled deformed steel bar.

Furthermore, a waterproof sealing gasket is arranged on the longitudinal joint.

Furthermore, each two adjacent H-shaped steel columns on the same side of the combined side wall plate are welded with batten plates to form lattice type steel columns.

Further, fine aggregate concrete is poured on the H-shaped steel columns of the combined side wall board to form the PEC combined column.

A construction method of the full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure comprises the following steps:

(1) constructing an outer underground continuous wall, and carrying out water precipitation in a pit;

(2) excavating a foundation pit to the bottom of the pit, constructing a cushion layer, paving the bottom and constructing a waterproof layer;

(3) positioning and hoisting the prefabricated blocks of the reinforced concrete pipe gallery, and connecting two adjacent prefabricated blocks of the reinforced concrete pipe gallery by adopting longitudinal joints;

(4) positioning and hoisting the combined side wall plates at two sides to ensure that the H-shaped steel columns of the combined side wall plates are in bolted welding connection with channel steel connecting pieces pre-buried at the corresponding sides of the precast reinforced concrete pipe gallery blocks;

(5) hoisting the PEC beam to enable two ends of the PEC beam to be respectively and rigidly connected with two spaced H-shaped steel columns of the combined side wall board at the same side;

(6) hoisting the combined middle plate to enable the steel beam of the combined middle plate to be in equal-strength connection with the short beam joint on the H-shaped steel column of the combined side wall plate;

(7) hoisting the combined top plate to enable the steel beam of the combined top plate to be in equal-strength connection with the short beam joint on the H-shaped steel column of the combined side wall plate;

(8) welding batten plates on two adjacent H-shaped steel columns of the combined side wall plate, and pouring fine aggregate concrete on the two H-shaped steel columns to form a PEC combined column;

(9) the local prestress tensions the joints.

Compared with the prior art, the invention has the advantages of a common assembly structure, batch production, uniform quality, short construction period, high construction precision, low construction cost, controllable quality, less noise and environmental pollution, less use of on-site construction templates and less waste of on-site building materials. In addition, compared with the general fully prefabricated concrete structural member, the following advantages are provided: in the design aspect, the joint stress is separated from the main body stress, the force transmission path is more definite, and the structural calculation analysis is more accurate; in the aspect of construction, the components are small, the weight is light, the construction equipment and the installation complexity are reduced, the node treatment on the construction site is more convenient, the construction period can be further shortened, the construction difficulty is reduced, the engineering quality is improved, the effects in the aspects of energy saving, water saving, material saving and the like are very obvious, the construction waste and the construction dust can be greatly reduced, and the environmental protection is more facilitated; in the aspect of operation and maintenance, the structure stress system is clear, so that the whole life cycle structure health monitoring arrangement, implementation, maintenance and diagnosis are facilitated, the structure strengthening and reinforcing design after the design service life is achieved is facilitated, and the service life are prolonged. Therefore, in a long term, the structural system has remarkable social benefit, economic and environmental benefit and popularization value.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a precast block for a reinforced concrete pipe gallery according to the present invention;

FIG. 3 is a schematic structural view of a short composite side wall panel of the present invention;

FIG. 4 is a schematic structural view of a long composite side wall panel of the present invention;

FIG. 5 is a schematic cross-sectional view of a PEC composite column of the present invention;

FIG. 6 is a schematic structural diagram of a combined middle plate according to the present invention;

FIG. 7 is a schematic view of the construction of the composite top plate of the present invention;

FIG. 8 is a schematic of the structure of a PEC beam in the present invention;

FIG. 9 is a schematic cross-sectional view of two PEC composite columns and their ceiling plate according to the present invention;

FIG. 10 is a schematic view of step (3) during the construction of the present invention;

FIG. 11 is a schematic view of step (4) during the operation of the present invention;

FIG. 12 is a schematic view of step (4) during the operation of the present invention;

FIG. 13 is a schematic view of step (4) during the operation of the present invention;

FIG. 14 is a schematic view of step (5) in the process of the present invention;

FIG. 15 is a schematic view of step (6) during the construction of the present invention;

FIG. 16 is a schematic diagram of step (7) during the construction of the present invention.

The reference numbers are as follows:

1 reinforced concrete pipe gallery prefabricated block

2 short combined side wall board

2a short combined side wall board

2b short combined side wall board

2c short combined side wall board

3 long combined side wall board

3a long combined side wall plate

3b long combined side wall plate

3c long combined side wall board

4 combination middle plate

4a combined middle plate

4b combined middle plate

4c combined middle plate

5 Combined top board

5a Combined roof

5b Combined top plate

5c Combined top plate

6PEC beam

7H shaped steel post

8 channel steel connecting piece

9 short beam joint

10 batten plate

11 fine stone concrete

12 structure steel bar

13PEC combination column.

Detailed Description

The following detailed description of the embodiments of the present invention will be given in conjunction with the accompanying drawings to make it clear to those skilled in the art how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.

Referring to fig. 1, a full-assembled underground pipe gallery and underground space constitute PEC integrated configuration altogether, includes bottom layer pipe gallery, soil-facing side wall, medium plate, roof, PEC roof beam 6.

The bottom layer pipe gallery is used as the bottom layer structure and is used for meeting the laying requirements of various pipelines. Referring to fig. 2, the bottom layer piping lane is assembled by polylith reinforced concrete piping lane prefabricated section 1 and is formed, and every reinforced concrete piping lane prefabricated section 1 is horizontal full-section prefabricated reinforced concrete component, is connected through longitudinal joint between two adjacent reinforced concrete piping lane prefabricated sections 1. The longitudinal joint comprises a tenon and a prestress finish rolling screw-thread steel, a waterproof sealing gasket can be arranged on the longitudinal joint, and the waterproof sealing gasket is matched with local prestress, so that the waterproof effect can be realized under the condition that the stress influence of the main structure is not required to be considered. The top surface of the reinforced concrete pipe gallery precast block 1 is provided with a channel steel connecting piece 8 for connecting an H-shaped steel column 7 of the combined side wall plate.

The soil-facing side wall is used for bearing the soil-facing pressure and is formed by splicing a plurality of combined side wall plates. Fig. 1 and 3 show the soil-facing side wall on the middle layer side, which is formed by splicing a plurality of short combined side wall boards 2, and the short combined side wall board 2a, the short combined side wall board 2b and the short combined side wall board 2c are taken as a unit; fig. 1 and 4 show the soil-facing side wall on the other side of the top layer and the middle layer, which is formed by splicing a plurality of long combined side wall boards 3, and the long combined side wall board 3a, the long combined side wall board 3b and the long combined side wall board 3c are taken as a unit. Each combined side wall plate adopts a combined structure of an H-shaped steel column 7 and a reinforced concrete slab, and comprises the reinforced concrete slab and the H-shaped steel column 7 fixed on the reinforced concrete slab through shear-resistant studs, wherein the H-shaped steel column 7 is provided with a short beam joint 9 for mounting a middle plate and a top plate. Referring to fig. 5, the bottom of the H-shaped steel column 7 is connected to the channel steel connector 8 on the top surface of the precast reinforced concrete pipe gallery block 1, the H-shaped steel column 7 is used for bearing vertical load, and after the H-shaped steel column 7 is connected to the channel steel connector 8, fine aggregate concrete 11 is poured into a cavity between the wing plate and the web plate of the H-shaped steel column 7, and optionally, a construction steel bar 12 is configured, so as to form a PEC combined column. The PEC combined column strengthens the waterproof and compressive bearing capacity of the vertical joint of the combined side wall plate, and simultaneously the opening section is locally bent, so that the bending resistance, torsional rigidity and overall stability of the whole section are improved, the fireproof and anticorrosion measures on the surface of the original H-shaped steel column are reduced, the PEC combined column is more economical and applicable, and the durability is improved.

The middle plate is formed by splicing a plurality of combination middle plates 4, and the middle plates shown in fig. 6 are a middle plate unit including a combination middle plate 4a, a combination middle plate 4b and a combination middle plate 4 c. Each combined middle plate 4 adopts a steel beam and reinforced concrete combined structure and comprises a reinforced concrete plate and a steel beam fixed on the reinforced concrete plate through shear resistant studs, and the steel beam is connected with a short beam joint 9 on the H-shaped steel column 7 with equal strength.

The top plate is formed by splicing a plurality of combined top plates 5, and the top plate shown in fig. 7 uses a combined top plate 5a, a combined top plate 5b and a combined top plate 5c as a top plate unit. Each combined top plate 5 adopts a steel beam and reinforced concrete combined structure and comprises a reinforced concrete plate and a steel beam fixed on the reinforced concrete plate through shear-resistant studs, and the steel beam is connected with a short beam joint 9 on the H-shaped steel column 7 with equal strength.

Referring to fig. 1 and 8, two ends of the PEC beam 6 are respectively and rigidly connected with the top ends of two H-shaped steel columns 7 spaced at the same side, and the PEC beam 6 is used as a top-layer large-span beam, so that the torsional rigidity, the bending rigidity and the bearing capacity are improved. After the PEC beam 6 is connected with the two H-shaped steel columns 7, referring to fig. 9, the two adjacent H-shaped steel columns 7 can be connected with the batten plate 10 by welding to form a lattice-type steel column, and then the fine aggregate concrete is poured into the lattice-type steel column to form the PEC composite column 13, so that the PEC beam and PEC composite column combined structure is formed, and the overall deformation and stress are greatly improved.

A construction method for a full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure comprises the following steps:

(1) constructing enclosure, leveling field, dredging traffic, constructing outer underground continuous wall and lowering water in pit.

(2) Excavating a foundation pit to the bottom of the pit, constructing a cushion layer, paving the bottom and constructing a waterproof layer.

(3) Referring to fig. 10, the reinforced concrete pipe gallery precast blocks 1 are positioned and hoisted, and the longitudinal joints are adopted to connect two adjacent reinforced concrete pipe gallery precast blocks 1.

(4) Referring to fig. 11, the short combined side wall plate 2a and the long combined side wall plate 3a are positioned and hoisted, so that the H-shaped steel column 7 of each combined side wall plate is bolted and welded with the channel steel connecting piece 8 on the corresponding side of the reinforced concrete pipe gallery precast block 1; referring to fig. 12, the short combined side wall plate 2b and the long combined side wall plate 3b are positioned and hoisted again, so that the H-shaped steel column 7 of each combined side wall plate is bolted and welded with the channel steel connecting piece 8 on the corresponding side of the reinforced concrete pipe gallery precast block 1; referring to fig. 13, next, the short combined side wall plate 2c and the long combined side wall plate 3c are positioned and hoisted, so that the H-shaped steel column 7 of each combined side wall plate is bolted and welded with the channel steel connecting piece 8 on the corresponding side of the reinforced concrete pipe gallery precast block 1.

(5) Referring to fig. 14, the PEC beam 6 is hoisted so that both ends thereof are rigidly connected to the top ends of two spaced H-shaped steel columns 7 of the same-side combined side wall panel respectively.

(6) Referring to fig. 15, the middle combined plate 4a, the middle combined plate 4b and the middle combined plate 4c are hoisted, so that the steel beam of each middle combined plate 4 is connected with the short beam joint 9 on the H-shaped steel column 7 of the combined side wall plate with equal strength.

(7) Referring to fig. 16, the combined top plate 5a, the combined top plate 5b and the combined top plate 5c are hoisted, so that the steel beam of each combined top plate 5 is connected with the short beam joint 9 on the H-shaped steel column 7 of the combined side wall plate with equal strength.

(8) And welding batten plates 10 on two adjacent H-shaped steel columns 7 of the combined side wall plate, and pouring fine aggregate concrete on the two H-shaped steel columns 7 to form the PEC combined column.

(9) The local prestress tensions the joints.

And (4) assembling a unit, and repeating the steps (3) - (9) to assemble other units until the whole PEC composite structure is constructed.

It should be noted that many variations and modifications of the embodiments of the present invention fully described are possible and are not to be considered as limited to the specific examples of the above embodiments. The above examples are given by way of illustration of the invention and are not intended to limit the invention. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.

Claims (6)

1. A full-assembly type underground pipe gallery and underground space co-constructed PEC combined structure is characterized by comprising a bottom layer pipe gallery, an earth-facing side wall, a middle plate, a top plate and a PEC beam;

the bottom-layer pipe gallery is formed by assembling a plurality of reinforced concrete pipe gallery prefabricated blocks, two adjacent reinforced concrete pipe gallery prefabricated blocks are connected through a longitudinal joint, and the top surfaces of the reinforced concrete pipe gallery prefabricated blocks are provided with channel steel connecting pieces;

the soil-facing side wall is formed by splicing a plurality of combined side wall plates, each combined side wall plate comprises a reinforced concrete plate and an H-shaped steel column fixed on the reinforced concrete plate through shear-resistant studs, each H-shaped steel column is provided with a short beam joint for mounting a middle plate and a top plate, the bottom of each H-shaped steel column is connected with a channel steel connecting piece on the top surface of a reinforced concrete pipe gallery prefabricated block, and a PEC beam is rigidly connected between the top ends of every two spaced H-shaped steel columns on the same side;

the medium plate is formed by the concatenation of polylith combination medium plate, the roof is formed by the concatenation of polylith combination roof, combination medium plate and combination roof all include reinforced concrete board and are fixed in the girder steel on reinforced concrete board through shear bolt nail, and the girder steel all adopts equal strong the connection with the short beam joint on the H shaped steel post.

2. The fully assembled underground pipe gallery and underground space co-constructed PEC composite structure of claim 1, wherein the longitudinal joints between the precast blocks of the reinforced concrete pipe gallery comprise a tenon and a pre-stressed finish-rolled deformed steel bar.

3. The fully assembled underground pipe gallery and underground space co-constructed PEC composite structure according to claim 1 or 2, wherein a waterproof gasket is arranged on the longitudinal joint.

4. The fully assembled underground pipe gallery and underground space co-constructed PEC composite structure according to claim 1, wherein batten plates are welded to each two adjacent H-shaped steel columns on the same side of the composite side wall plate to form lattice steel columns.

5. The fully assembled underground pipe gallery and underground space co-constructed PEC composite structure of claim 4, wherein the H-shaped steel columns of the combined side wall panels are poured with fine stone concrete to form the PEC composite columns.

6. A construction method of the full-fabricated underground pipe gallery and underground space co-constructed PEC combined structure is characterized by comprising the following steps:

(1) constructing an outer underground continuous wall, and carrying out water precipitation in a pit;

(2) excavating a foundation pit to the bottom of the pit, constructing a cushion layer, paving the bottom and constructing a waterproof layer;

(3) positioning and hoisting the prefabricated blocks of the reinforced concrete pipe gallery, and connecting two adjacent prefabricated blocks of the reinforced concrete pipe gallery by adopting longitudinal joints;

(4) positioning and hoisting the combined side wall plates at two sides to ensure that the H-shaped steel columns of the combined side wall plates are in bolted welding connection with channel steel connecting pieces pre-buried at the corresponding sides of the precast reinforced concrete pipe gallery blocks;

(5) hoisting the PEC beam to enable two ends of the PEC beam to be respectively and rigidly connected with two spaced H-shaped steel columns of the combined side wall board at the same side;

(6) hoisting the combined middle plate to enable the steel beam of the combined middle plate to be in equal-strength connection with the short beam joint on the H-shaped steel column of the combined side wall plate;

(7) hoisting the combined top plate to enable the steel beam of the combined top plate to be in equal-strength connection with the short beam joint on the H-shaped steel column of the combined side wall plate;

(8) welding batten plates on two adjacent H-shaped steel columns of the combined side wall plate, and pouring fine aggregate concrete on the two H-shaped steel columns to form a PEC combined column;

(9) the local prestress tensions the joints.

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