Continuous open caisson station construction method implemented along road trend in framing mode

Abstract

The invention discloses a continuous open caisson station construction method implemented in a framing mode in the road trend, an underground station to be built is located under a road, the occupied area is rectangular on a plane graph, the underground station comprises side walls on the two sides and end walls at the two ends, and the small included angle between the length direction and the road trend is smaller than 30 degrees; the method comprises the following steps that 1, an underground station to be built is divided into two parts along the center line of a road, and two-stage open caisson construction is conducted; each open caisson section comprises the same number of open caisson sections which are in one-to-one correspondence; 2, first-stage open caisson construction is conducted, a first-stage open caisson structure is constructed, and a fence is arranged in the range, corresponding to the first-stage open caisson construction, of the road for guide and modification; and 3, second-stage open caisson construction is conducted, a second-stage open caisson structure is constructed, and a fence is arranged in the range, corresponding to second-stage open caisson construction, of the road for guide and modification. Scientific and reasonable transverse framing is carried out on the station open caisson structure in the road trend, the requirement for borrowing space on the two sides of the road by traffic guide and change is greatly reduced, and the existing traffic is not interrupted in the construction period.

Description

Technical Field

[0001] This invention relates to the field of caisson construction technology, and in particular to a method for constructing a continuous caisson railway station by implementing the construction in sections along a road. Background Technology

[0002] The continuous caisson method, as a new type of green and low-carbon underground station construction technology, is increasingly being applied to urban rail transit underground stations in soft soil areas. The continuous caisson method involves first constructing caisson structures in sections on the ground, then pressing them into the designated locations in batches, and finally connecting them to form the entire station. Compared to the traditional open-cut method, the continuous caisson method uses underwater excavation, avoiding the problem of sudden inrush of pressurized water in soft soil areas. Furthermore, the caisson structures are prefabricated in factories, and the caisson structure itself can also serve as the retaining structure, achieving complete integration of the main structure and the retaining structure, saving construction time and costs. Therefore, vigorously promoting the application of the continuous caisson method in the field of urban rail transit has significant social and economic benefits.

[0003] However, during the construction of underground stations using the continuous caisson method, temporary barriers inevitably need to be erected at the construction site, leading to traffic disruptions within the barrier area. When the proposed station is located beneath existing roads in the city's core area, ensuring smooth traffic flow on existing roads during construction is crucial to minimizing the impact on socio-economic activities. Currently, a common solution is to temporarily divert traffic to both sides of the barriers, utilizing the available space on either side of the road to maintain traffic flow. However, in actual engineering projects, the available space on both sides of many core urban roads is extremely limited, failing to meet the "borrow one, return one" space requirement for traffic diversion. In such cases, existing traffic diversion schemes are difficult to implement, not only affecting construction progress but also potentially triggering a series of social problems such as traffic congestion.

[0004] Traditional open-cut railway stations often employ a segmented construction method along the road direction, utilizing the space created during initial construction to address road traffic issues during the excavation process. However, there are currently no engineering case studies for segmented construction of railway stations using the continuous caisson method. In particular, key technologies such as the longitudinal and transverse node connection methods, construction techniques, and waterproofing treatments for caisson-based stations, especially after longitudinal segmentation, require further in-depth research. These technical challenges restrict the application and promotion of the continuous caisson method in complex traffic environments.

[0005] Therefore, how to scientifically and rationally divide the station caisson structure along the road direction to significantly reduce the demand for borrowed space on both sides of the road for traffic diversion and ensure that existing traffic is not interrupted during construction has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above-mentioned deficiencies of the prior art, the present invention provides a continuous caisson station construction method that is implemented in sections along the road direction. The purpose is to significantly reduce the need for borrowing space on both sides of the road by scientifically and rationally dividing the station caisson structure into sections along the road direction, so as to ensure that the existing traffic is not interrupted during the construction period.

[0007] To achieve the above objectives, this invention discloses a method for constructing a continuous caisson underground station, implemented in sections along a road. The underground station to be constructed is located directly beneath the road, and the site of the underground station is rectangular in plan view, including side walls on both sides and end walls at both ends. The angle between the length direction and the direction of the road is less than 30 degrees. The method includes the following steps:

[0008] Step 1: Divide the underground station to be constructed into two sections along the centerline of the road and carry out two phases of caisson construction; each section includes the same number of corresponding caisson sections;

[0009] Step 2: Carry out the first phase of caisson construction, construct the first phase caisson structure, and set up barriers in the area of ​​the road corresponding to the first phase of caisson construction for diversion.

[0010] Step 3: Carry out the second phase of caisson construction, construct the second phase caisson structure, and set up the barriers in the area of ​​the road corresponding to the second phase caisson construction for diversion.

[0011] The construction of each phase of the caisson includes the following steps:

[0012] Step A1: Set up the barriers in the corresponding part of the road, and set up lanes on both sides of the barriers to redirect the road.

[0013] Step A2: Number all the caisson sections of the corresponding section sequentially;

[0014] Step A3: Construct the caisson sections with odd numbers in advance;

[0015] Step A4: Construct all remaining even-numbered caisson sections;

[0016] Step A5: After completing the construction of every two adjacent caisson sections, the joint gaps are sealed with post-grouting to achieve water stoppage.

[0017] Preferably, each of the aforementioned enclosures is at least 3 meters away from the construction area of ​​the corresponding caisson.

[0018] Preferably, the number of lanes on the side where the caisson construction has been completed or where the caisson construction is to be carried out is greater than the number of lanes on the other side of the caisson.

[0019] Preferably, each of the caisson structures is constructed using the pressure sinking method;

[0020] The first phase of caisson construction employed a first sinking system and a second sinking system.

[0021] The second phase of caisson construction employed a second and a third sinking system.

[0022] The first settling system includes a plurality of settling reaction piles disposed on the outer side of the corresponding sidewall;

[0023] The second sinking system includes a number of steel columns disposed within the area of ​​the second-phase caisson structure, close to the interval between the first-phase caisson structure and the second-phase caisson structure;

[0024] The third sinking system includes a number of steel columns disposed within the scope of the second-phase caisson structure, close to the corresponding sidewalls;

[0025] Each of the steel columns is provided with a sinking reaction pile at its lower end, and the corresponding sinking reaction pile is inserted into the lower end.

[0026] The tops of all the reaction piles in the second and third sinking systems are located at the bottom slab of the underground station to be constructed;

[0027] The portion of each steel column located above the permanent stage of the first and second phases of the caisson construction shall be removed during the construction of the corresponding mid-span and side span of the underground station to be built.

[0028] More preferably, temporary columns are provided above the side beam of the uppermost structure of each caisson segment in the first phase of caisson construction, corresponding to each of the sinking reaction piles outside the corresponding side wall, and each of the steel columns corresponding to the interval position between the first phase caisson structure and the second phase caisson structure.

[0029] Each of the temporary columns is provided with a steel bracket near its upper end, facing the corresponding sinking reaction pile in the first sinking system or the side of the corresponding steel column in the second sinking system.

[0030] Each of the steel brackets is located directly above the corresponding sinking reaction pile or the corresponding steel column, and steel strands are provided between each of them and the corresponding sinking reaction pile or the corresponding steel column;

[0031] The reaction piles provide the reaction force when each section of the caisson is pressed down. The pile diameter and pile length are determined comprehensively based on the pressing force and the soil layer distribution.

[0032] More preferably, the upper ends of all the sinking reaction piles in the first sinking system are connected to the top ring beam;

[0033] The top ring beam is located 1 m to 3 m below the ground, and hot-rolled U-shaped steel sheet piles and temporary retaining walls are provided on the outer side facing away from the first-phase caisson structure.

[0034] More preferably, the outer side of each side beam of each caisson segment near the interval between the first-phase caisson structure and the second-phase caisson structure is connected to a temporary frame beam by a steel bar connector.

[0035] All of the temporary frame beams are provided with multiple temporary frame columns along their length that extend to the bottom slab of the first-phase caisson structure and the second-phase caisson structure;

[0036] Each section of the second-phase caisson structure includes a second-phase outer caisson wall adjacent to the corresponding sidewall;

[0037] Each of the side beams of the second-phase outer well wall is provided with a second-phase crossbeam between it and the temporary frame beam of the corresponding height.

[0038] More preferably, the temporary column is provided on the side beam of the uppermost structure of each caisson section in the second phase of caisson construction;

[0039] Each temporary column on the side beam of the uppermost structure of each caisson section in the second phase of caisson construction has a steel bracket near the upper end, facing the side of the corresponding steel column in the third sinking system.

[0040] In the second phase of caisson construction, steel strands are provided between the steel brackets on the uppermost temporary columns of each caisson section and the corresponding steel columns.

[0041] Before the second and third caisson systems were constructed, all the steel columns were buried in the underground soil. During the second phase of caisson construction, the soil from the top to the corresponding caisson reaction pile was excavated step by step as the corresponding caisson sections sank.

[0042] More preferably, the pressing devices for the caisson construction in the first phase and the caisson construction in the second phase are both hydraulic jacks, and the downward pressure is transmitted to the corresponding caisson wall and the corresponding sinking reaction pile through the corresponding steel bracket and the corresponding steel strand, respectively.

[0043] The first, second, and third sinking systems are all digitally controlled, and the downward pressure is adjusted in real time through the digital control.

[0044] Preferably, a first caisson joint is provided on the joint surface of the side wall where each odd-numbered caisson segment meets the adjacent even-numbered caisson segment.

[0045] In the first phase of caisson construction, a second caisson joint is provided on the joint surface of the side wall of each odd-numbered caisson segment and the adjacent odd-numbered caisson segment in the second phase of caisson construction.

[0046] Each of the first caisson joints and each of the second caisson joints includes a first embedded steel plate and a second embedded steel plate;

[0047] Each of the first pre-embedded steel plates is pre-embedded in the caisson sections numbered odd by a number of anchor bars;

[0048] The first embedded steel plate of each first caisson joint is set on the side wall of the corresponding caisson segment, located at the end face facing the adjacent even-numbered caisson segment.

[0049] The first embedded steel plate of each second caisson joint is set on the side wall of the caisson segment belonging to the first phase of caisson construction, and is located on the side facing the end sealing wall of the adjacent caisson segment belonging to the second phase of caisson construction.

[0050] The second embedded steel plate of each of the first caisson joints is set on the side wall of the even-numbered caisson segment, located on the end face facing the adjacent odd-numbered caisson segment;

[0051] The second embedded steel plate of each second caisson joint is set in the end sealing wall of the caisson segment that belongs to the second phase of caisson construction and is numbered odd, and is located at the end face of the caisson segment that belongs to the first phase of caisson construction.

[0052] Each of the second embedded steel plates has two parallel steel ribs on the side facing the corresponding side wall or the corresponding end sealing wall, and both are perpendicular to the horizontal plane.

[0053] The position of the second embedded steel plate is provided with a groove for each of the steel ribs, and a displacement adjuster is provided between the groove and the steel rib.

[0054] Each of the displacement adjusters is a spring structure with good elasticity, with one end anchored to the concrete structure of the corresponding groove and the other end anchored to the corresponding steel rib.

[0055] The beneficial effects of this invention are:

[0056] This invention significantly reduces the need for borrowed space on both sides of the road by scientifically and rationally dividing the station caisson structure along the road direction, thus ensuring that existing traffic is not interrupted during construction.

[0057] This invention not only solves the traffic problems of continuous caisson construction in urban core areas, but also fills the technical gap in the segmented construction of stations using the continuous caisson method. It provides a more efficient, environmentally friendly, and adaptable construction technology solution for urban rail transit construction, and promotes the development of urban rail transit construction to a higher level.

[0058] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0059] Figure 1 This diagram illustrates the relative positions of the underground station to be constructed and the road in one embodiment of the present invention.

[0060] Figure 2 The diagram shows a schematic of the first-stage caisson construction in one embodiment of the present invention.

[0061] Figure 3 The diagram shows a schematic of the second-stage caisson construction in one embodiment of the present invention.

[0062] Figure 4 This diagram illustrates the completed construction process according to an embodiment of the present invention.

[0063] Figure 5 This diagram shows a cross-sectional view of the first-stage caisson construction in one embodiment of the present invention.

[0064] Figure 6 This diagram shows a cross-sectional view of the second-phase caisson construction in one embodiment of the present invention.

[0065] Figure 7 This invention is shown Figure 5 A magnified view of a portion of point C in the middle.

[0066] Figure 8 This shows Figure 7 Schematic diagram of the cross section in the middle EE direction.

[0067] Figure 9 This invention is shown Figure 5 A magnified view of a portion of point D in the middle.

[0068] Figure 10 This invention is shown Figure 9 Schematic diagram of the cross section in the middle FF direction.

[0069] Figure 11 This is a partially enlarged schematic diagram of the blade angle portion in one embodiment of the present invention.

[0070] Figure 12 This invention is shown Figure 2 A magnified view of a portion of point A in the middle.

[0071] Figure 13 This invention is shown Figure 2 A magnified view of a portion of point B in the middle. Detailed Implementation

[0072] Example 1: Take a three-level underground continuous caisson railway station located under a road in the core urban area as an example.

[0073] The existing road is 30m wide with six lanes in both directions. The new station is located beneath the road, running east-west. The station is 160m long, with an end shaft width of 26.74m and a standard section width of 22.14m. If the conventional continuous caisson construction method is used, a construction fence will be erected outside the station, with a minimum clearance of 3m between the fence and the station. To ensure uninterrupted traffic flow during construction, the road will be diverted to both sides of the fence, utilizing 15m of space on both the north and south sides of the existing road.

[0074] like Figures 1 to 11 As shown, the construction method of the continuous caisson station, implemented in sections along the road, involves the underground station 16 to be constructed directly beneath the road. The area occupied by the underground station 16 is rectangular in plan view, including the side walls on both sides and the end walls at both ends. The angle between its length and the road direction is less than 30 degrees. The construction method includes the following steps:

[0075] Step 1: Divide the underground station 16 to be constructed into two sections along the centerline of the road and carry out two phases of caisson construction; each section includes the same number of corresponding caisson sections;

[0076] Step 2: Carry out the first phase of caisson construction, construct the first phase of caisson structure, and set up a barrier 1 in the area of ​​the road corresponding to the first phase of caisson construction for diversion.

[0077] Step 3: Carry out the second phase of caisson construction, construct the second phase caisson structure, and set up a barrier 1 in the area of ​​the road corresponding to the second phase caisson construction for diversion.

[0078] Each phase of caisson construction includes the following steps:

[0079] Step A1: Set up a barrier 1 at the corresponding part of the road, and set up lanes on both sides of the barrier 1 to redirect the road.

[0080] Step A2: Number all sections of the caisson in the corresponding section sequentially;

[0081] Step A3: Construct the caissons in sections with odd numbers first;

[0082] Step A4: Construct the remaining even-numbered caisson sections.

[0083] Step A5: After completing the construction of every two adjacent caisson sections, the joint gaps are sealed with post-grouting to achieve water stoppage.

[0084] This patented method employs a continuous caisson station construction approach that divides the road into sections, reducing the need for borrowed space on both sides of the road due to traffic diversion. By scientifically and rationally dividing the caisson structure of the station along the road, the need for borrowed space on both sides of the road due to traffic diversion is significantly reduced, ensuring uninterrupted traffic flow. This method fills a technological gap in continuous caisson station construction, is simple, safe, and reliable, promotes technological progress in the industry, and has good economic and social benefits.

[0085] In some embodiments, each enclosure 1 is at least 3m away from the construction area of ​​the corresponding caisson construction.

[0086] In some embodiments, the number of lanes on the side of the enclosure 1 where the caisson construction has been completed or where the caisson construction is to be carried out is greater than the number of lanes on the other side of the enclosure 1.

[0087] like Figure 2 As shown, in practical applications, when constructing the first phase of the caisson, the lanes are set up close to the outside of the enclosure 1 as follows: 4 lanes are set up on the north side, totaling 20m, and 2 lanes are set up on the south side, totaling 10m. Based on the original road, 10m of space is borrowed from both the north and south sides respectively, which reduces the width of the roadside space occupied by 10m compared with the traditional method.

[0088] During the second phase of caisson construction, the lanes adjacent to the outer side of the enclosure were set up as follows: 10m of space was borrowed from the north side of the road, creating two lanes. The south side road borrowed the space above the completed second phase caisson construction and also borrowed 10m of space from the south side of the road, creating four lanes in total, for a total of 20m. This phase, by borrowing 10m of space from both the north and south sides of the existing road, reduced the roadside space occupied by 10m compared to traditional methods.

[0089] In some embodiments, each caisson structure is constructed using the pressure sinking method;

[0090] The first phase of caisson construction employed both a primary sinking system and a secondary sinking system.

[0091] The second phase of caisson construction employed a second and a third sinking system.

[0092] The first settling system includes several settling reaction piles 4 installed on the outer side of the corresponding sidewalls;

[0093] The second sinking system includes several steel columns 10 set within the area of ​​the second-phase caisson structure, close to the interval between the first-phase caisson structure and the second-phase caisson structure.

[0094] The third sinking system includes several steel columns 10 set within the structure of the second-phase caisson, close to the corresponding sidewalls;

[0095] Each steel column 10 is equipped with a sinking reaction pile 4 at its lower end, and the corresponding sinking reaction pile 4 is inserted into the lower end.

[0096] The tops of all the reaction piles 4 of the second and third sinking systems are located at the bottom slab of the underground station 16 to be constructed.

[0097] The portion of each steel column 10 located above the permanent stage 10 of the first and second phases of caisson construction is cut off during the construction of the corresponding mid-span and side span of the underground station 16 to be built.

[0098] In some embodiments, temporary columns 8 are provided above the side beam 23 of the uppermost structure of each caisson section in the first phase of caisson construction, corresponding to each sinking reaction pile 4 outside the corresponding side wall, and each steel column 10 corresponding to the interval position between the first phase caisson structure and the second phase caisson structure.

[0099] Each temporary column 8 has a steel bracket 5 near its upper end, facing the corresponding sinking reaction pile 4 in the first sinking system or the side facing the corresponding steel column 10 in the second sinking system.

[0100] Each steel bracket 5 is located directly above the corresponding sinking reaction pile 4 or the corresponding steel column 10, and a steel strand 6 is provided between each steel bracket 5 and the corresponding sinking reaction pile 4 or the corresponding steel column 10; each steel bracket 5 and the corresponding steel strand 6 are connected and fixed by anchor bolts.

[0101] The reaction pile 4 provides the reaction force when each section of the caisson is pressed down. The pile diameter and pile length are determined comprehensively based on the downward pressure and the soil layer distribution.

[0102] In some embodiments, the upper ends of all the sinking reaction piles 4 of the first sinking system are connected to the top ring beam 9;

[0103] The top ring beam 9 is located 1 m to 3 m below the ground. Hot-rolled U-shaped steel sheet piles 21 and temporary retaining walls 22 are provided on the outer side facing away from the first phase caisson structure.

[0104] The presence of the top ring beam 9 connects all the sinking reaction piles 4 of the first sinking system on the plane into a whole.

[0105] The top ring beam 9 is located 1 m to 3 m below the ground. Hot-rolled U-shaped steel sheet piles and temporary retaining walls are installed on the outer side facing away from the first phase caisson structure, which can optimize the height of the corresponding temporary columns 8.

[0106] In some embodiments, the outer side of each side beam 23 of each caisson segment near the interval between the first-phase caisson structure and the second-phase caisson structure is connected to a temporary frame beam 18 by a steel bar connector 17.

[0107] All temporary frame beams 18 are provided with multiple temporary frame columns 19 along the length direction, extending to the bottom slab of the first-phase caisson structure and the second-phase caisson structure.

[0108] Each section of the second-phase caisson structure includes a second-phase outer caisson wall near the corresponding sidewall;

[0109] Each beam 23 of the second-phase outer well wall is connected to a temporary frame beam 18 of the corresponding height by a second-phase crossbeam 20.

[0110] In some embodiments, temporary columns 8 are provided on the side beams 23 of the uppermost structure of each caisson section during the second-phase caisson construction.

[0111] In the second phase of caisson construction, each temporary column 8 on the side beam 23 of the uppermost structure of each caisson segment is equipped with a steel bracket 5 near the upper end, facing the corresponding steel column 10 in the third sinking system.

[0112] In the second phase of caisson construction, steel strands 6 are installed between the steel brackets 5 and the corresponding steel columns 10 on the uppermost temporary column 8 of each caisson section.

[0113] Before the second-phase caisson construction, all steel columns 10 of the second and third caisson systems were buried in the underground soil. During the second-phase caisson construction, the soil from the top to the corresponding caisson reaction pile 4 was excavated step by step as the corresponding caisson sections sank.

[0114] In some embodiments, the pressing devices for the first-phase caisson construction and the second-phase caisson construction are hydraulic jacks, and the downward pressure is transmitted to the corresponding caisson wall and the corresponding sinking reaction pile 4 through the corresponding steel brackets 5 and the corresponding steel strands 6, respectively.

[0115] The first, second, and third subsidence systems all employ digital control, allowing for real-time adjustment of the subsidence pressure.

[0116] like Figure 12 and Figure 13 As shown, in some embodiments, a first caisson joint is provided on the joint surface of the side wall connecting each odd-numbered caisson segment and the adjacent even-numbered caisson segment.

[0117] In the first phase of caisson construction, a second caisson joint is provided on the joint surface of the side wall of each caisson segment with an odd number in the first phase of caisson construction and the adjacent caisson segment with an odd number in the second phase of caisson construction.

[0118] Each first caisson joint and each second caisson joint includes a first embedded steel plate 13 and a second embedded steel plate 14;

[0119] Each first embedded steel plate 13 is embedded in the odd-numbered caisson section by a number of anchor bars 15;

[0120] The first embedded steel plate 13 of each first caisson joint is set on the side wall of the corresponding caisson segment, located at the end face facing the adjacent even-numbered caisson segment.

[0121] The first embedded steel plate 13 of each second caisson joint is set on the side wall of the caisson segment belonging to the first phase of caisson construction, and is located on the side of the end sealing wall 24 of the adjacent caisson segment belonging to the second phase of caisson construction.

[0122] The second embedded steel plate 14 of each first caisson joint is set on the side wall of the even-numbered caisson segment, located on the end face facing the adjacent odd-numbered caisson segment.

[0123] The second embedded steel plate 14 of each second caisson joint is set on the end sealing wall 24 of the caisson segment that belongs to the second phase of caisson construction and is numbered odd, and is located on the end face of the caisson segment that belongs to the first phase of caisson construction.

[0124] Each second embedded steel plate 14 has two parallel steel ribs 12 on the side facing the corresponding side wall or the corresponding end sealing wall 24, and both are perpendicular to the horizontal plane.

[0125] The position of the second embedded steel plate 14 is provided with a groove for each corresponding steel rib plate 12, and a displacement adjuster 11 is provided between the corresponding groove and the corresponding steel rib plate 12.

[0126] Each adjustment mechanism 11 is a spring structure with good elasticity, with one end anchored to the concrete structure of the corresponding groove and the other end anchored to the corresponding steel rib plate 12.

[0127] Starting with the even-numbered caisson sections in the first phase of caisson construction, during the sinking process of each caisson section, the first embedded steel plate 13 and the second embedded steel plate 14 of the corresponding first caisson joint and the corresponding second caisson joint are all tightly pressed against each other. When the verticality of the caisson section deviates, it is adjusted by the corresponding displacement adjuster 11.

[0128] The steel ribs 12 of the first caisson joint and the corresponding second caisson joint can achieve the function of water and soil blocking, and the thickness needs to be determined in combination with water and soil pressure calculation.

[0129] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A method of constructing a station by means of continuous sinking of caissons along the course of a road, characterized in that, The to-be-constructed underground station (16) is located directly below the road, and the occupied area is rectangular on the plan view, including side walls on both sides and end walls at both ends, and the smaller included angle between the length direction and the direction of the road is less than 30 degrees, comprising the following steps: Step 1, the to-be-constructed underground station (16) is divided into two parts along the center line of the road, and two-stage sinking well construction is carried out; each part includes the same number of sinking well sections corresponding one by one; Step 2, the first sinking well construction is carried out, the first sinking well structure is constructed, and the fence (1) is arranged on the road corresponding to the range of the first sinking well construction for diversion and improvement; Step 3, the second sinking well construction is carried out, the second sinking well structure is constructed, and the fence (1) is arranged on the road corresponding to the range of the second sinking well construction for diversion and improvement; Each sinking well construction includes the following steps: Step A1, the fence (1) is arranged on the corresponding part of the road, and a lane is arranged on both sides of the fence (1) to realize the diversion and improvement of the road; Step A2, all sinking well sections of the corresponding part are numbered in turn; Step A3, all the sinking well sections numbered with odd numbers are constructed first; Step A4, all the remaining sinking well sections numbered with even numbers are constructed; Step A5, after the construction of every two adjacent sinking well sections is completed, the joint gap is sealed by post-grouting to realize water stop.

2. The method according to claim 1, wherein the continuous caisson station construction method is implemented in sections along the course of the road. Each fence (1) is at a distance of not less than 3m from the construction area of the corresponding sinking well construction.

3. The method according to claim 1, wherein the method is implemented by dividing the site into sections along the route of the road. The number of lanes on one side of the fence (1) where the sinking well construction has been completed or is to be carried out is greater than the number of lanes on the other side of the fence (1).

4. The method according to claim 1, wherein the method is characterized by, Each sinking well structure is constructed by pressure sinking method; The first sinking well construction uses a first pressure sinking system and a second pressure sinking system, The second sinking well construction uses a second pressure sinking system and a third pressure sinking system, The first pressure sinking system includes a plurality of pressure sinking reaction piles (4) arranged outside the corresponding side wall; The second pressure sinking system includes a plurality of steel columns (10) arranged in the range of the second sinking well structure, close to the interval between the first sinking well structure and the second sinking well structure; The third pressure sinking system includes a plurality of steel columns (10) arranged in the range of the second sinking well structure, close to the corresponding side wall; The lower end of each steel column (10) is provided with a pressure sinking reaction pile (4), and the lower end is inserted into the corresponding pressure sinking reaction pile (4); The top of all pressure sinking reaction piles (4) of the second pressure sinking system and the third pressure sinking system is located at the bottom plate position of the to-be-constructed underground station (16); The part of each steel column (10) above the permanent stage (10) of the first sinking well construction and the second sinking well construction is cut off when the corresponding position of the to-be-constructed underground station (16) is built.

5. The method according to claim 4, wherein the continuous caisson station construction method is implemented in sections along the course of the road. Temporary columns (8) are arranged above the side beams (23) of the uppermost layer of each caisson section of the first-stage caisson construction, corresponding to each counterforce pile (4) outside the side wall and each steel column (10) at the interval between the first-stage caisson structure and the second-stage caisson structure; Each temporary column (8) is provided with a steel bracket (5) near the upper end, facing the side of the corresponding counterforce pile (4) in the first sinking system or the corresponding steel column (10) in the second sinking system; Each steel bracket (5) is located directly above the corresponding counterforce pile (4) or steel column (10), and is provided with a steel strand (6) between the corresponding counterforce pile (4) or steel column (10). The counterforce pile (4) provides the counterforce when each caisson section is pressed down, and the pile diameter and length are determined comprehensively according to the pressing force and soil layer distribution.

6. The method according to claim 5, wherein the method is implemented in a continuous caisson station construction method along a road route, characterized by, The upper ends of all counterforce piles (4) of the first sinking system are connected to a top ring beam (9); The top ring beam (9) is located 1-3m below the ground, and is provided with hot-rolled U-shaped steel sheet piles (21) and temporary retaining walls (22) on the side away from the first-stage caisson structure.

7. The method according to claim 5, wherein the method is implemented by dividing the site into sections along the route of the road. Each side beam (23) of each caisson section of the first-stage caisson construction near the interval between the first-stage caisson structure and the second-stage caisson structure is connected to a temporary frame beam (18) through a steel reinforcement adapter (17); All temporary frame beams (18) are provided with multiple temporary frame columns (19) extending to the bottom plate of the first-stage caisson structure and the second-stage caisson structure in the length direction; Each caisson section of the second-stage caisson structure includes a second-stage outer caisson wall near the corresponding side wall. Each side beam (23) of the second-stage outer caisson wall is provided with a second-stage cross beam (20) between the corresponding temporary frame beam (18) of the corresponding height.

8. The method according to claim 7, wherein the method is implemented in a continuous caisson station construction method along a road alignment, characterized by, The temporary column (8) is arranged on the side beam (23) of the uppermost layer structure of each caisson section of the second-stage caisson construction; Each temporary column (8) on the side beam (23) of the uppermost layer structure of each caisson section of the second-stage caisson construction is provided with a steel bracket (5) near the upper end, facing the side of the corresponding steel column (10) in the third sinking system; The steel bracket (5) on each temporary column (8) on the uppermost layer structure of each caisson section of the second-stage caisson construction is provided with a steel strand (6) between the corresponding steel column (10). All steel columns (10) of the second sinking system and the third sinking system are buried in the underground soil before the second sinking construction, and the soil from the top to the corresponding counterforce pile (4) is gradually removed with the sinking of the corresponding caisson section.

9. The method according to claim 8, wherein the method is implemented in a continuous caisson station construction method along a road layout, characterized by, The pressing device of the caisson construction in the first phase and the caisson construction in the second phase is a hydraulic jack, and the pressing force is transmitted to the corresponding caisson wall and the corresponding pressure sinking counterforce pile (4) through the corresponding steel corbel (5) and the corresponding steel strand (6); The first pressure sinking system, the second pressure sinking system and the third pressure sinking system are all digitally controlled, and the pressing force is adjusted in real time through the digital control.

10. The method of claim 1, wherein the method is implemented in a continuous caisson station construction method along a road alignment, characterized by, Each odd-numbered caisson section is provided with a first caisson joint on the joint surface of the side wall of the adjacent even-numbered caisson section; Each odd-numbered caisson section in the caisson construction in the first phase is provided with a second caisson joint on the joint surface of the side wall of the adjacent odd-numbered caisson section in the caisson construction in the second phase; Each first caisson joint and each second caisson joint comprises a first embedded steel plate (13) and a second embedded steel plate (14); Each first embedded steel plate (13) is embedded in the odd-numbered caisson section through a plurality of anchor bars (15); The first embedded steel plate (13) of each first caisson joint is arranged on the side wall of the corresponding caisson section and located at the end surface position facing the adjacent even-numbered caisson section; The first embedded steel plate (13) of each second caisson joint is arranged on the side wall of the caisson section belonging to the caisson construction in the first phase and located at the side surface position of the end closure wall (24) facing the adjacent caisson section belonging to the caisson construction in the second phase; The second embedded steel plate (14) of each first caisson joint is arranged on the side wall of the even-numbered caisson section and located at the end surface facing the adjacent odd-numbered caisson section; The second embedded steel plate (14) of each second caisson joint is arranged on the end closure wall (24) of the odd-numbered caisson section belonging to the caisson construction in the second phase and located at the end surface position facing the caisson section belonging to the caisson construction in the first phase; Each second embedded steel plate (14) is provided with two steel rib plates (12) facing the corresponding side wall or the corresponding end closure wall (24), which are parallel to each other and perpendicular to the horizontal plane; The position where the second embedded steel plate (14) is arranged is provided with a recess corresponding to each steel rib plate (12), and a displacement adjuster (11) is arranged between the recess and the steel rib plate (12); Each displacement adjuster (11) is a spring structure with good elasticity, one end of which is anchored to the concrete structure of the corresponding recess, and the other end of which is anchored to the corresponding steel rib plate (12).

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