CN113818306B

CN113818306B - Temporary pavement working plate structure for subway station

Info

Publication number: CN113818306B
Application number: CN202111189860.0A
Authority: CN
Inventors: 陈琪; 王瑞峰; 金文强; 李海锋; 王哲; 李琳; 张岳; 王晓光; 任昕; 邵葳; 于宏福
Original assignee: Beijing Urban Construction Design and Development Group Co Ltd
Current assignee: Beijing Urban Construction Design and Development Group Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-12-30
Anticipated expiration: 2041-10-12
Also published as: CN113818306A

Abstract

A temporary pavement working plate covering structure for a subway station at least comprises steel cover plates, cover plate beams and a cross bracing assembly, wherein the steel cover plates are independent steel cover plates, two ends of each steel cover plate are respectively erected on the two cover plate beams, the lower ends of the cover plate beams are connected to foundation pit concrete supports, the cross bracing assembly is arranged between the two cover plate beams to provide scissor-type supports, each steel cover plate comprises an upper steel plate, a lower steel plate and a cross stiffening rib, each cover plate beam comprises I-shaped steel and a stiffening rib, and the cross bracing assembly comprises a diagonal bracing and a diagonal bracing connector; therefore, the structural assembly is safe and reliable, can standardize components, is fast to disassemble and assemble, can be recycled, has low construction cost, and can effectively meet the use requirement of temporary road surfaces in subway construction.

Description

Temporary pavement covering plate structure for subway station

Technical Field

The invention relates to the technical field of subway engineering construction, in particular to a temporary pavement working plate structure of a subway station.

Background

In recent years, the development of urban underground space in China has entered a high-speed development period, and as far as 2020, the total length of urban rail transit operation lines in China is about 7970km, and when the approved rail transit planning is implemented, the length exceeds 7000km, and the urban underground space in China enters a gridding stage for a plurality of places. The crossing and crossing conditions between newly-built subway lines and existing roads and buildings are continuously increased, and how to effectively reduce the influence of construction on the traffic operation of the existing urban roads in the subway construction process is of great importance without causing traffic jam. In order to solve the problem, the cover excavation method is widely applied to the construction of the subway station. The construction method can recover traffic in a short time, has good construction conditions and high structural reliability, but usually needs a large amount of temporary non-standard supporting materials in the use process, causes waste and brings inconvenience to construction.

At present, a subway cover-excavation construction station is constructed by a cover-excavation sequential method basically, and a six-four military-use beam and precast concrete cover plate temporary pavement assembly is adopted. The sixty-four military beams need to be rented to relevant departments. The precast concrete cover plate is basically precast on site, and the temporary pavement assembly is dismantled after the station construction is finished. The precast concrete apron abandonment can not reuse, produces a large amount of building rubbish, causes the resource serious waste, has the environmental sanitation problems such as the component prefabrication process is slow, causes dust, noise during the prefabrication simultaneously.

In order to solve the problems, a construction covering plate structure is proposed in recent years, and the construction covering plate structure is generally a cover plate formed by welding section steel and steel plates in a combined mode, and is suitable for shallow-buried subway stations or municipal foundation pit engineering under the conditions that surrounding buildings are dense, traffic is busy, pipelines are more, the pipeline moving cost is high, and the like. However, the structure is rarely researched in China, the designed structure is simple, the practicability is poor, the lower support connection, the overall stability and the like are not considered enough, the matching technology and the field application experience are lacked, and the current utilization rate is still low. Design schemes proposed by some foreign companies cannot meet the use requirements of China, have problems in structural performance requirements, matching technology and the like, and are difficult to apply.

At present, in the engineering of covering a working plate on a temporary pavement for excavation of a foundation pit of a subway station, the following problems mainly exist:

1) When the precast concrete cover plate is adopted, the precast concrete cover plate can not be reused after being dismantled after construction is finished, a large amount of building waste is generated, and the resource is seriously wasted.

2) The manufacturing process of the precast concrete cover plate is slow, the maintenance period is long, and the project progress is not facilitated; meanwhile, the quality of the cover plate is not well controlled, and environmental sanitation problems such as dust and noise can be caused during prefabrication.

3) At present, no special construction plate covering structure for the subway station foundation pit is available, the existing pavement construction plate covering structure is simple in design, professional designs such as drainage, shock absorption and noise reduction are lacked, and the practicability is poor.

4) The existing steel covers the structure of the construction board, the cover plate beam is often directly placed on the cross brace at the top of the foundation pit, the reliable connection measure between the cover plate beam and the cross brace at the top of the foundation pit is lacked, the bearing capacity checking and calculating requirement of the structure design can not be met, and the safe development of the engineering is difficult to guarantee.

5) The existing steel product covers the structure of the construction board, the cover plate beam lacks the reinforcement measure for preventing self instability, the adopted I-steel is easy to be damaged by instability under the action of the eccentric load transferred downwards by the steel cover plate, and the safety is not enough.

6) The existing steel covers the worker's board structure, lacks reliable horizontal support between the adjacent apron roof beam, takes place to collapse in succession easily and topples, has very big potential safety hazard. When the traditional X-shaped bridging is used for supporting between adjacent cover plate beams, the problem that accurate connection cannot be achieved due to construction positioning errors is often caused.

7) Some foreign companies propose the design scheme of the covering plate, but the covering plate is difficult to be native, cannot meet the use requirements of China, has problems in the aspects of structural performance requirements, matching technology and the like, and is difficult to be applied.

Therefore, a novel temporary pavement construction plate structure for subway stations is urgently needed, can meet the use requirements of subway projects in China, is convenient to process, can be standardized in components, quick to disassemble and assemble and reusable in accessories, and is very important for guaranteeing smooth development of the projects and saving resources.

Therefore, in view of the above-mentioned drawbacks, the present inventors have conducted extensive research and design to overcome the above-mentioned drawbacks by designing and developing a temporary road surface covering plate structure for a subway station, which combines the experience and result of related industries for many years.

Disclosure of Invention

The invention aims to provide a temporary pavement working plate structure for a subway station, which can effectively overcome the defects of the prior art, has safe and reliable structural components, effectively reduces the influence of construction on the surrounding environment, can standardize components, is quick to disassemble and assemble, can be recycled, has low construction cost, and can effectively ensure the use requirement of the temporary pavement for subway construction.

In order to achieve the purpose, the invention discloses a temporary pavement construction plate structure of a subway station, which at least comprises steel cover plates, cover plate beams and a cross bracing assembly, wherein the steel cover plates are a plurality of independent steel cover plates, two ends of each steel cover plate are respectively erected on the two cover plate beams, the lower ends of the cover plate beams are connected with a foundation pit concrete support, the cross bracing assembly is arranged between the two cover plate beams to provide a cross bracing type support, and the structure is characterized in that:

each steel cover plate consists of an upper steel plate, a lower steel plate and a cross stiffening rib, the upper steel plate and the lower steel plate are arranged oppositely, the peripheries of the upper steel plate and the lower steel plate are connected through side steel plates to form a main body structure of the steel cover plate, the cross stiffening rib is arranged between the upper steel plate and the lower steel plate, the cover plate beam consists of I-shaped steel and stiffening ribs, and the stiffening ribs are arranged on the side surfaces of the I-shaped steel, so that the buckling deformation of a flange plate of the I-shaped steel is effectively prevented;

the bridging subassembly includes bracing and bracing connector, the bracing is two, and the both ends of two bracings are fixed to apron roof beam and intermediate junction to be the relative setting of scissors form.

Wherein: go up the steel sheet thickness and should be greater than 20mm, and the upper surface has set gradually anticorrosive coating and anti-skidding wear-resistant coating, the stiffening rib thickness of cross stiffening rib is greater than 10mm.

Wherein: go up the steel sheet and be equipped with a plurality of drain pipes in order to be used for in time discharging surface gathered water at rainy day between the steel sheet down at the interval, be equipped with waterproof strip between two adjacent steel cover plates and be used for shutoff inter-plate clearance, the steel sheet is equipped with a plurality of steel sheet bolt holes down in order to make steel cover plate and lower part member connection through the bolt down, be equipped with the rubber shock pad between the top of I-steel and the steel cover plate.

Wherein: still contain coupling assembling, coupling assembling includes spacing angle steel, spacing angle steel symmetry sets up at the upper and lower end of I-steel inboard, and one side of each spacing angle steel welds on the I-steel, and is equipped with the bolt hole on the another side to support with steel deck and foundation ditch concrete respectively through connecting bolt and be connected.

Wherein: the connecting assembly further comprises anti-overturning angle steels, the anti-overturning angle steels are symmetrically arranged on the inner sides of the anti-overturning angle steels by taking the I-shaped steel as a center respectively, each anti-overturning angle steel comprises a short edge and a long edge, a corner between each short edge and each long edge is 135 degrees, bolt holes are formed in the ends of the short edges and the long edges, and one end of the short edge of the upper anti-overturning angle steel is connected to the lower steel plate through a lower steel plate bolt; the minor face one end and the foundation ditch concrete support of antidumping angle steel of lower part are connected, the long limit one end of antidumping angle steel all is connected with the stiffening rib, effectively strengthens being connected of steel deck and apron roof beam and foundation ditch concrete support from this, prevents the structure unstability.

Wherein: still be equipped with the fixed subassembly in bottom, it includes anchor bolt and plant bar glue, anchor bolt anchor is gone into foundation ditch concrete support and is filled the plant bar glue.

Wherein: the bottom fixing component is also provided with a pre-buried steel plate, the pre-buried steel plate is pre-buried on the upper surface of the foundation pit concrete support and is in an inverted-Chinese-character-shaped shape, and the anchoring bolts and the bar planting glue penetrate through the pre-buried steel plate and then are connected with the foundation pit concrete support.

Wherein: each inclined strut is a cylinder, the middle part of each inclined strut is a semi-cylinder, an inclined strut bolt hole is formed in the middle of each inclined strut, and the inclined struts are inserted into the inclined strut bolt holes through bolts to be connected to form the X-shaped support.

Wherein: the both ends of bracing are provided with the external screw thread in order to be connected with the internal thread cap, internal thread cap one end is the hollow cylinder of internal screw thread in order to be connected with the external screw thread of bracing, and the other end is connected to the stiffening rib through the bracing connector, and the external screw thread end through the bracing is adjusted with the rotation of internal thread cap in order effectively to adjust the bracing length from this.

Wherein: the other end of internal thread cap is protruding and nestification for T shape and can freely rotate in that the bracing connector is inside, the one end of bracing connector is connected in the internal thread cap, thereby the other end sets up the bolt hole for the semicircle column and the centre and is connected with stiffening rib.

According to the above content, the temporary pavement covering plate structure for the subway station has the following effects:

1. the structural component is safe and reliable, can make the component standardized, the dismouting is quick, cyclic utilization, and engineering cost is low, can guarantee subway construction temporary pavement operation requirement effectively.

2. Effectively alleviate steel apron self weight to promote the bending resistance of structure, effectively strengthen steel apron and apron roof beam and foundation ditch concrete support's being connected, prevent the structural instability.

3. Effective adjustment can be realized, selectivity is increased, and favorable conditions are provided for design; meanwhile, the requirement on construction positioning precision is greatly reduced, and the problem that a standard component cannot be used when the construction precision is insufficient is solved.

The details of the present invention can be obtained from the following description and the attached drawings.

Drawings

Fig. 1 shows a structural schematic diagram of a temporary pavement covering plate structure of a subway station of the present invention.

Figure 2 shows a front view of the invention.

Figure 3 shows a top view of the present invention.

Figure 4 shows a schematic view of a steel deck according to the invention.

Fig. 5 shows a schematic view of a deck beam of the present invention.

FIG. 6 shows a schematic view of a scissor assembly of the present invention.

FIG. 7 shows a single front view of the scissor assembly of the present invention.

FIG. 8 shows a top view of a single cross of the cross-brace assembly of the present invention.

Reference numerals are as follows:

go up steel sheet 1, lower steel sheet 2, cross stiffening rib 3, anticorrosive coating 4, anti-skidding wear-resistant coating 5, drain pipe 6, waterproof stripe 7, lower steel sheet bolt hole 8, I-steel 9, stiffening rib 10, stiffening rib bolt hole 11, lower steel sheet bolt hole 12, spacing angle steel 13, connecting bolt 14, anti-overturning angle steel 15, anti-overturning angle steel bolt 17, rubber shock pad 18, anchor bolt 19, bar planting glue 20, pre-buried steel sheet 21, bracing 22, bracing bolt hole 23, internal thread cap 24, bracing connector 25.

Detailed Description

Referring to fig. 1 to 8, the temporary pavement working plate structure of a subway station of the present invention is shown.

Subway station temporary pavement covers worker's board structure includes steel decking, apron roof beam, coupling assembling, the fixed subassembly in bottom and bridging subassembly, the steel decking is a plurality of independent steel decking to rapid Assembly, every steel decking's both ends are put up respectively on two apron roof beams, make the structure atress more reasonable, select suitable quantity to assemble according to the demand in the use, thereby be suitable for more extensively, the upper end of apron roof beam supports in the steel decking, and the lower extreme is connected in foundation ditch concrete support, coupling assembling is located between apron roof beam and steel decking and the foundation ditch concrete support in order to be connected to the apron roof beam respectively to steel decking and foundation ditch concrete support, the bridging subassembly sets up in order to provide scissors formula support between two apron roof beams.

Each steel apron comprises last steel sheet 1, lower steel sheet 2 and cross stiffening rib 3, go up steel sheet 1 and lower steel sheet 2 and set up relatively, and the periphery connects in order to form the major structure of steel apron through the side steel sheet, cross stiffening rib 3 sets up between last steel sheet 1 and lower steel sheet 2 to effectively alleviate steel apron self weight, and promote the bending resistance of structure.

Wherein, go up steel sheet 1's thickness and should be greater than 20mm, and the upper surface has set gradually anticorrosive coating 4, anti-skidding wear-resistant coating 5 to when guaranteeing the apron bearing capacity, effectively improve life, provide good ground sense of grabbing simultaneously for the vehicle traveles. The thickness of the stiffening rib of the cross stiffening rib 3 is larger than 10mm, the weight of the steel cover plate is reduced, the bending resistance of the structure is improved, the weight of the steel cover plate is reduced, and the bending resistance of the structure is improved efficiently.

Referring to fig. 4 simultaneously, go up steel sheet 1 and be equipped with a plurality of drain pipes 6 between the steel sheet 2 at the interval to be used for in time discharging surface ponding in the rainy day, prevent that steel sheet top ponding from corroding rust and the inside water of depositing of steel cover. Prevent simultaneously that steel sheet ponding from corroding rustting, be equipped with joint strip 7 between two adjacent steel cover plates for shutoff interplate clearance prevents that the rainwater from flowing into below foundation ditch, avoids two adjacent steel cover plates to collide using the contact simultaneously, plays the noise reduction effect, lower steel sheet 2 is equipped with a plurality of steel sheet bolt holes 8 down to make steel cover plate and lower part member connection through the bolt.

Referring to fig. 5, the deck beam supports the steel deck and is composed of i-beams 9 and stiffening ribs 10, wherein the type of the i-beams 9 is greater than 45a, so as to ensure sufficient bending resistance, and prevent the flange plate from buckling and deforming under the action of the eccentric load of the vehicle, and the structure is more reliable. Stiffener 10 sets up in the side of I-steel 9 to effectively prevent that the flange plate of I-steel from taking place buckling deformation, the interval is provided with 3 stiffener bolt holes 11 on the stiffener 10, so that be connected with coupling assembling and bridging subassembly, the lower part of I-steel 9 is equipped with bolt hole 12 under the I-steel, thereby is connected with the concrete shotcrete support of foundation ditch through anchor bolt.

The connecting assembly comprises limit angle steels 13 and anti-overturning angle steels 15, wherein 4 limit angle steels 13 are respectively and symmetrically arranged on the inner sides of the upper end and the lower end of an I-shaped steel 9 (see fig. 2), one side of each limit angle steel 13 is welded on the I-shaped steel 9, bolt holes are formed in the other side of each limit angle steel 13, and the limit angle steels are respectively connected with a steel cover plate and a foundation pit concrete support through connecting bolts 14, wherein the two limit angle steels 13 on the upper part are connected to a lower steel plate 2 through the connecting bolts 14, the two limit angle steels 13 on the lower part are connected to a pre-embedded plate 21 in the foundation pit concrete support through the connecting bolts 14 to play a certain role in limiting position and fixing, the number of the anti-overturning angle steels 15 is 8, the anti-overturning angle steels are respectively and symmetrically arranged on the inner sides of the I-shaped steel 9 (see fig. 2 and 3 simultaneously), each anti-overturning angle steel 15 comprises a short side and a long side, the corner between the short side and the long side is 135 degrees, the short side and the long side ends are both provided with bolt holes, and one end of the upper 4 anti-overturning angle steels 15 are connected to the lower steel plate bolt holes 2 through the lower steel plate bolts 16 and the lower steel plate bolt holes 8; one end of the short side of each of the 4 lower anti-overturning angle steels 15 is connected with the steel bar planting adhesive 20 and the concrete support of the foundation pit through an anchor bolt 19, and one end of the long side of each of the anti-overturning angle steels 15 is connected with the stiffening rib bolt hole 11 in the middle of the stiffening rib 10 through an anti-overturning angle steel bolt 17.

A rubber shock pad 18 is arranged between the top of the I-steel 9 and the steel cover plate, plays a role in supporting the steel cover plate, has a certain buffering function, enables the steel cover plate and the cover plate beam to be hinged, and enables the whole structure to be stressed more reasonably; the steel cover plate is prevented from being contacted and collided with the cover plate beam under the action of dynamic load of the vehicle, and the effects of shock absorption and noise reduction are achieved.

Wherein, the fixed subassembly in bottom includes anchor bolt 19, bar planting glue 20 and pre-buried steel sheet 21, anchor bolt 19 diameter should be greater than 18mm, and the anchor goes into lower part concrete support 20mm, corresponds position drilling with foundation ditch concrete support when using, fills bar planting glue 20, puts into anchor bolt 19 afterwards, treats to accomplish after the bar planting glue solidifies and connects. The anchor bolt 10 and the bar planting glue 20 play a role in fixing, are easy to operate, and reduce the construction difficulty while ensuring the reliability. The embedded steel plate 21 is embedded in the upper surface of the concrete support in advance according to the design position requirement, is in an inverted 'mountain' shape, has the thickness larger than 16mm, and is connected and fixed with the I-shaped steel 9 through the limiting angle steel 13 at the lower part. And two pairs of anchor bolts 19 and bar planting glue 20 penetrate through the embedded steel plate and are connected with the concrete support of the lower foundation pit

Referring to fig. 6 and 7, the cross brace assembly includes two cross braces 22 and cross brace connectors 24, referring to fig. 6, the cross braces 22 are two, two ends of the two cross braces 22 are fixed to the cover plate beam and connected in the middle to be oppositely disposed in a scissor shape, specifically, each cross brace 22 is a cylinder and a semi-cylinder in the middle, a cross brace bolt hole 23 is formed in the middle of the cross brace 22, the two cross braces 22 are oppositely used during use and connected to each other by inserting a bolt into the cross brace bolt hole 23 to form an X-shaped support, two ends of the cross brace 22 are provided with external threads to be connected to an internal screw cap 23, one end of the internal screw cap 23 is a hollow cylinder with internal threads to be connected to the external threads of the cross brace 22, the other end of the internal screw cap is a T-shaped protrusion and is nested inside the cross brace connector 24 and can freely rotate, one end of the cross brace connector 24 is connected to the internal screw cap 23, the other end of the cross brace connector 24 is a semi-cylinder and is provided with a bolt hole in the middle to be connected to the upper and lower stiffener 11 on the upper side of the stiffener 10, wherein the long and short steel bar bolt holes are selectively adjustable by adjusting the external threads of the cross brace 22, and the adjacent i-steel bar connectors 9; meanwhile, the requirement on construction positioning precision is greatly reduced, and the problem that a standard component cannot be used when the construction precision is insufficient is solved.

Therefore, when the subway construction temporary pavement is constructed by using the method, the structure is reliable, the dismounting is quick, the recycling is realized, and the construction cost is low.

It should be apparent that the foregoing description and illustrations are by way of example only and are not intended to limit the present disclosure, application or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.

Claims

1. The utility model provides a subway station temporary pavement covers worker's board structure, includes steel apron, apron roof beam and bridging subassembly at least, the steel apron is a plurality of independent steel apron, and every steel apron's both ends are put up respectively on two apron roof beams, the lower extreme of apron roof beam is connected in foundation ditch concrete support, the bridging subassembly sets up in order to provide scissors formula support, its characterized in that between two apron roof beams:

each steel cover plate consists of an upper steel plate, a lower steel plate and a cross stiffening rib, the upper steel plate and the lower steel plate are arranged oppositely, the peripheries of the upper steel plate and the lower steel plate are connected through side steel plates to form a main body structure of the steel cover plate, the cross stiffening rib is arranged between the upper steel plate and the lower steel plate, the cover plate beam consists of I-shaped steel and stiffening ribs, and the stiffening ribs are arranged on the side surfaces of the I-shaped steel, so that the flange plates of the I-shaped steel are effectively prevented from buckling deformation;

the cross brace assembly comprises two inclined braces and inclined brace connectors, and the two inclined braces are fixed to the cover plate beam at two ends and connected in the middle, so that the two inclined braces are oppositely arranged in a scissor shape;

the anti-overturning steel plate is characterized by further comprising a connecting assembly, wherein the connecting assembly comprises limit angle steels, the limit angle steels are symmetrically arranged on the inner sides of the upper end and the lower end of the I-steel, one side of each limit angle steel is welded on the I-steel, a bolt hole is formed in the other side of each limit angle steel, the limit angle steels are respectively connected with the steel cover plate and the foundation pit concrete support through connecting bolts, the connecting assembly further comprises anti-overturning angle steels, the anti-overturning angle steels are symmetrically arranged on the inner sides of the anti-overturning angle steels respectively by taking the I-steel as a center, each anti-overturning angle steel comprises a short edge and a long edge, the corner between the short edge and the long edge is 135 degrees, the short edge and the long edge are respectively provided with bolt holes, and one end of the short edge of the anti-overturning angle steel on the upper portion is connected to a lower steel plate through a lower steel plate bolt; the minor face one end and the foundation ditch concrete support of antidumping angle steel of lower part are connected, the long limit one end of antidumping angle steel all is connected with the stiffening rib, effectively strengthens being connected of steel apron and apron roof beam and foundation ditch concrete support from this, prevents the structure unstability.

2. The subway station temporary road surface covering plate structure as claimed in claim 1, wherein: go up the steel sheet thickness and should be greater than 20mm, and the upper surface has set gradually anticorrosive coating and anti-skidding wear-resistant coating, the stiffening rib thickness of cross stiffening rib is greater than 10mm.

3. A temporary road surface working plate structure of a subway station as claimed in claim 1, wherein: go up the steel sheet and be equipped with a plurality of drain pipes in order to be used for in time discharging surface gathered water at rainy day between the steel sheet down at the interval, be equipped with waterproof strip between two adjacent steel cover plates and be used for shutoff interplate clearance, the steel sheet is equipped with a plurality of steel sheet bolt holes down in order to make steel cover plate and lower part member connection through the bolt down, be equipped with the rubber shock pad between the top of I-steel and the steel cover plate.

4. The subway station temporary road surface covering plate structure as claimed in claim 1, wherein: still be equipped with the fixed subassembly in bottom, it includes anchor bolt and bar planting glue, the anchor bolt anchor is gone into foundation ditch concrete and is supported and fill the bar planting glue.

5. A temporary pavement covering plate structure for a subway station as claimed in claim 4, wherein: the bottom fixing assembly is further provided with an embedded steel plate, the embedded steel plate is embedded in the upper surface of the foundation pit concrete support in an embedded mode and is in an inverted-Chinese character 'shan' -shaped mode, and the anchoring bolts and the steel bar planting glue penetrate through the embedded steel plate and are connected with the foundation pit concrete support.

6. A temporary road surface working plate structure of a subway station as claimed in claim 1, wherein: each inclined strut is a cylinder, the middle part of each inclined strut is a semi-cylinder, an inclined strut bolt hole is formed in the middle of each inclined strut, and the inclined struts are inserted into the inclined strut bolt holes through bolts to be connected to form the X-shaped support.

7. A temporary pavement covering plate structure for a subway station as claimed in claim 6, wherein: the both ends of bracing are provided with the external screw thread in order to be connected with the internal thread cap, internal thread cap one end is the hollow cylinder of internal screw thread in order to be connected with the external screw thread of bracing, and the other end is connected to the stiffening rib through the bracing connector, and the external screw thread end through the bracing is adjusted with the rotation of internal thread cap in order effectively to adjust the bracing length from this.

8. A temporary road surface working plate structure for a subway station as claimed in claim 7, wherein: the other end of the internal thread cap is T-shaped, protruding and nested inside the diagonal brace connector and can freely rotate, one end of the diagonal brace connector is connected to the internal thread cap, and the other end of the diagonal brace connector is connected with the stiffening rib through the bolt hole formed in the middle of the semi-cylindrical connector.