A combined support pile structure and construction method for a bank-side sunken road

Abstract

The present invention relates to a bank-side sunken road combined supporting pile structure and a construction method, belonging to the technical field of deep foundation pit support. A first foundation pit support is provided. The first foundation pit support does not overlap with the structure of a cable-stayed anchor cable, does not cause interference, and is coordinated with each other. Therefore, the problem that the construction site of an existing tunnel is located in an urban area with severe site restrictions and the original riverside road in the area needs to be retained, the bank support piles are located on the water side of the road, and the foundation pit support piles are located on the water side of the foundation pit of the road. The two groups of pile structures cannot be directly connected and need to maintain a certain distance. Therefore, in this case, there will be a problem that the cable-stayed anchor cable of the bank support pile passes through the bottom of the road and interferes with the foundation pit support pile group.

Description

Technical Field

[0001] The invention belongs to the technical field of deep foundation pit support, and in particular relates to a bank-sunken road combined support pile structure and a construction method. Background Art

[0002] In the construction of a river crossing tunnel with an underground interchange on the bank, underwater trench excavation and bank pit excavation are often involved. In order to prevent the landslide behind the embankment caused by the underwater trench excavation, it is necessary to reinforce the embankment with support piles and reinforce it with inclined anchor cables in the stratum on the inner side of the bank. In addition, the bank tunnel foundation pit will also be reinforced with foundation pit support piles to prevent the side wall of the foundation pit from collapsing.

[0003] When there are no important facilities around the construction site of the tunnel, the construction method of the embankment support piles and the foundation pit support piles is relatively free, and the distance can be adjusted according to the actual conditions of the construction site.

[0004] When the construction site of the tunnel is located in an urban area with severe site restrictions and the original riverside road in the area needs to be retained, the bank support piles are located on the water side of the road, and the foundation pit support piles are located on the water side of the road. The two groups of pile structures cannot be directly connected and need to maintain a certain distance. Therefore, in this case, the inclined anchor cables of the bank support piles will interfere with the foundation pit support pile group after passing through the bottom of the road. Summary of the invention

[0005] In order to solve the problem that the construction site of the existing tunnel is located in the urban area with severe site restrictions and the original riverside road in the area needs to be retained, the embankment support piles are located on the water side of the road, and the foundation pit support piles are located on the water side of the road. The two groups of pile structures cannot be directly connected and need to maintain a certain distance. Therefore, in this case, there will be a problem that the oblique anchor cables of the embankment support piles will interfere with the foundation pit support pile group after passing through the bottom of the road. The present invention provides a bank-sunken road combined support pile structure and a construction method.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A bank-side sunken road combined support pile structure, comprising a plurality of bank supports, a plurality of inclined anchor cable groups and a plurality of first foundation pit supports, wherein the plurality of bank supports are arranged on the foundation inside the river bank at equal intervals along the setting direction of the river bank, the plurality of inclined anchor cable groups are matched with the plurality of bank supports in a one-to-one correspondence, one end of any of the inclined anchor cable groups is connected to the corresponding bank support, and the other end thereof is connected to the foundation away from the river bank;

[0008] A plurality of first foundation pit supports are matched one-to-one with a plurality of inclined anchor cable groups, and a plurality of first foundation pit supports are arranged in the shore foundation pit at equal intervals along the axial direction of the shore foundation pit. The first foundation pit supports are located at the top of the corresponding inclined anchor cable groups and the two do not interfere with each other and overlap.

[0009] As a preferred technical solution of the present invention, the embankment support includes a plurality of ground-anchored wall piles, a load-releasing pedestal and a plurality of reinforced concrete seats, the load-releasing pedestal is arranged on the river bank, a plurality of ground-anchored wall piles are buried deep in the river bank foundation at equal intervals in a direction perpendicular to the river bank, the top of the ground-anchored wall piles is connected to the bottom of the load-releasing pedestal, a plurality of reinforced concrete seats are matched with a plurality of ground-anchored wall piles in a one-to-one correspondence, any of the reinforced concrete seats is arranged directly above the corresponding ground-anchored wall pile, and the reinforced concrete seat is arranged at the top of the load-releasing pedestal.

[0010] As a preferred technical solution of the present invention, the inclined-stayed anchor cable group includes a plurality of inclined-stayed anchor cables, the reinforced concrete seat and the unloading pedestal together form a slot hole with a certain inclination angle, the plurality of slot holes are matched one-to-one with a plurality of inclined-stayed anchor cables, any of the inclined-stayed anchor cables is arranged in the corresponding slot hole, the top of the inclined-stayed anchor cable is connected to the corresponding reinforced concrete seat, and the other end thereof extends out of the corresponding slot hole and is connected to a foundation away from the river bank.

[0011] As a preferred technical solution of the present invention, the inclination angles of the plurality of oblique-stayed anchor cables are all the same.

[0012] As a preferred technical solution of the present invention, the first foundation pit support includes a left cast-in-place pile, a right cast-in-place pile and a plurality of supporting structures. The left cast-in-place pile is vertically arranged at one end of the shore foundation pit close to the road, and the right cast-in-place pile is vertically arranged at the other end of the shore foundation pit relative to the left cast-in-place pile. A plurality of supporting structures are arranged in the shore foundation pit at equal intervals along the axial direction of the left cast-in-place pile, and the two ends of the supporting structure are respectively connected to the left cast-in-place pile and the right cast-in-place pile, and the bottom surface of the right cast-in-place pile is 0.5m away from the nearest inclined anchor cable.

[0013] As a preferred technical solution of the present invention, it also includes a plurality of second foundation pit supports, a connecting space is provided between two adjacent groups of the first foundation pit supports, the plurality of connecting spaces are matched with the plurality of second foundation pit supports in a one-to-one correspondence, and any of the second foundation pit supports is arranged in a corresponding connecting space;

[0014] The structure of the second foundation pit support is consistent with that of the first foundation pit support, and the length of the right cast-in-place pile of the second foundation pit support is longer than the length of the right cast-in-place pile of the first foundation pit support.

[0015] A construction method for a bank-side sunken road combined supporting pile structure comprises the following steps:

[0016] S1: Two first pouring grooves are dug at both ends of the foundation pit on the bank. A temporary support is provided at the bottom of the pouring groove close to the river bank. The temporary support can separate the space of the first pouring groove. A vertical through-tube is provided on the temporary support. The two first pouring grooves are poured by pouring to form a cast-in-place pile. The first pouring groove without the through-tube is the left cast-in-place pile, and the first pouring groove with the through-tube is the right cast-in-place pile.

[0017] S2: Use a crane to lift the support structure into the foundation pit on the shore, connect the support structure to the left cast-in-place pile by manual connection, and provide a temporary connection to connect the support structure and the foundation pit on the shore respectively, and finally connect the support structure to the right cast-in-place pile by manual connection;

[0018] S3: installing a plurality of the support structures in sequence from bottom to top to complete the preliminary installation of a single first foundation pit support;

[0019] S4: Repeat the above steps S1-S3 to complete the preliminary installation of several first foundation supports.

[0020] As a preferred technical solution of the present invention, the following steps are included:

[0021] S5: After the preliminary installation of the single first foundation pit support is completed, two second grouting grooves are dug at both ends of the shore foundation pit, and the two second grouting grooves are grouted to form left and right grouting piles of the second foundation pit support respectively;

[0022] S6: using a crane to lift the supporting structure of the second foundation pit support into the shore foundation pit, and manually connecting the two ends of the supporting structure of the second foundation pit support to the left cast-in-place pile and the right cast-in-place pile respectively;

[0023] S7: installing the plurality of supporting structures of the second foundation pit support in sequence from bottom to top to complete the installation of a single second foundation pit support;

[0024] S8: Repeat the above steps S5-S7 to complete the installation of several second foundation supports.

[0025] As a preferred technical solution of the present invention, the following steps are included:

[0026] S10: a plurality of fixing grooves are dug on the river bank, and the plurality of fixing grooves are arranged at equal intervals in a direction perpendicular to the edge of the river bank, and cement is poured into the fixing grooves to form a plurality of ground-anchored wall piles;

[0027] S11: placing the unloading cap on the river bank by hanging, and bonding the bottom surface of the steel bar to a plurality of ground-anchored wall piles;

[0028] S12: a plurality of reinforced concrete seats are installed on the unloading cap, and then a plurality of inclined anchor cables in the same inclined anchor cable group are connected and installed respectively, so as to complete the installation of a single bank support;

[0029] S13: Repeat the above steps S10-S12 to complete the installation of several bank supports.

[0030] As a preferred technical solution of the present invention, the following steps are included:

[0031] S121: After a single bank support is installed, a drilling machine is extended to a temporary support through a core pipe, and the temporary support is drilled through, so that the spaces of the grouting grooves corresponding to the temporary support seals are connected to each other;

[0032] S122: Fill the pouring tank with cement by pouring until the pouring tank is fully filled.

[0033] The beneficial effects of the present invention are:

[0034] This scheme provides a first foundation pit support. Since its structure does not overlap with the structure of the inclined anchor cable and does not cause interference, it solves the problem that the construction site of the existing tunnel is located in the urban area with severe site restrictions and the original riverside road in the area needs to be retained. The bank support piles are located on the water side of the road, and the foundation pit support piles are located on the water side of the road. The two groups of pile structures cannot be directly connected and need to maintain a certain distance. Therefore, in this case, there will be a problem that the inclined anchor cable of the bank support piles will interfere with the foundation pit support pile group after passing through the bottom of the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0036] Figure 1 It is a side view of a bank-side sunken road combined support pile structure including temporary connections of the present invention;

[0037] Figure 2 For the present invention Figure 1 A magnified image of point A;

[0038] Figure 3 A side view of a bank-side sunken road combined support pile structure without temporary connections according to the present invention;

[0039] Figure 4 This is a second foundation pit support diagram of a bank-sunken road combined support pile structure of the present invention.

[0040] Description of main symbols

[0041] In the figure: 1. Bank support; 101. Ground-anchored wall piles; 102. Unloading cap; 103. Reinforced concrete seat; 2. First foundation pit support; 201. Left cast-in-place piles; 202. Right cast-in-place piles; 203. Support structure; 3. Inclined anchor cables; 4. Second foundation pit support; 5. Temporary support; 6. Through-core pipe; 7. Temporary connection. DETAILED DESCRIPTION

[0042] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0043] See also Figure 1-4This embodiment provides a bank-side sunken road combined support pile structure. It should be noted that the application of this solution is that in the construction of a river crossing tunnel with an underground interchange on the bank, underwater foundation trench excavation and bank foundation pit excavation are often involved. In order to prevent the excavation of the underwater foundation trench from causing landslides behind the embankment, it is necessary to reinforce the embankment support piles and reinforce the inclined anchor cables 3 in the stratum on the inner side of the bank. In addition, in order to avoid collapse of the side walls of the tunnel, the foundation pit will be reinforced with foundation pit support piles. Generally speaking, when there are no important facilities around the construction site of the tunnel, the construction method of the bank support piles and the foundation pit support piles is relatively free, and the distance can be adjusted according to the actual conditions of the construction site. However, when the construction site of the tunnel is located in an urban area with severe site restrictions and the original riverside roads in the area need to be retained, the bank support piles are located on the water side of the road, and the foundation pit support piles are located on the water side of the road. The two groups of pile structures cannot be directly connected and need to maintain a certain distance. Therefore, in this case, the inclined anchor cable 3 of the bank support piles will interfere with the foundation pit support pile group after passing through the bottom of the road. Based on this, the structure of this scheme includes a plurality of bank supports 1, a plurality of inclined anchor cable groups and a plurality of first foundation pit supports 2. The plurality of bank supports 1 are arranged on the foundation inside the river bank at equal intervals along the setting direction of the river bank. The plurality of inclined anchor cable groups are matched with the plurality of bank supports 1 in one-to-one correspondence. One end of any inclined anchor cable group is connected to the corresponding bank support 1, and the other end thereof is connected to the foundation far away from the river bank. The plurality of first foundation pit supports 2 are matched with the plurality of inclined anchor cable groups in one-to-one correspondence. The plurality of first foundation pit supports 2 are arranged in the bank foundation pit at equal intervals along the axial direction of the bank foundation pit. The first foundation pit supports 2 are located at the corresponding inclined anchor cable groups. The top of the cable group and the two do not interfere with each other and overlap. By setting a first foundation pit support 2, the first foundation pit support 2 does not overlap with the structure of the inclined anchor cable 3 and does not cause interference. Therefore, the problem that the construction site of the existing tunnel is located in the urban area and the site is severely restricted, and the original riverside road in the area needs to be retained, the bank support piles are located on the water side of the road, and the foundation pit support piles are located on the water side of the road. The two groups of pile structures cannot be directly connected and need to maintain a certain distance. Therefore, in this case, there will be a problem that the inclined anchor cable 3 of the bank support pile passes through the bottom of the road and interferes with the foundation pit support pile group.

[0044] Specifically, the bank support 1 of the present scheme includes a plurality of ground-connected wall piles 101, a load-relief platform 102 and a plurality of reinforced concrete seats 103. The load-relief platform 102 is arranged on the river bank, and the plurality of ground-connected wall piles 101 are buried deep in the river bank foundation at equal intervals along a direction perpendicular to the river bank. The top of the ground-connected wall piles 101 is connected to the bottom of the load-relief platform 102, and the plurality of reinforced concrete seats 103 are matched with the plurality of ground-connected wall piles 101 in a one-to-one manner. Any reinforced concrete seat 103 is arranged directly above the corresponding ground-connected wall pile 101, and the reinforced concrete seat 103 is arranged on the top of the load-relief platform 102. In addition, the inclined anchor The cable group includes a plurality of inclined anchor cables 3, and the reinforced concrete seat 103 and the unloading pedestal 102 together form a slot with a certain inclination angle. The plurality of slots are matched one by one with the plurality of inclined anchor cables 3. Any inclined anchor cable 3 is arranged in the corresponding slot. The top of the inclined anchor cable 3 is connected to the corresponding reinforced concrete seat 103, and the other end thereof extends out of the corresponding slot and is connected to the foundation away from the river bank. By providing an embankment support 1, since the two ends of the inclined anchor cable group are respectively connected to the corresponding embankment support 1 and the foundation, the provision of the embankment support 1 can prevent the river bank from tilting and collapsing toward the river water side, thereby strengthening the embankment structure of the river bank.

[0045] Furthermore, the first foundation pit support 2 of the present scheme includes a left cast-in-place pile 201, a right cast-in-place pile 202 and a plurality of support structures 203. The left cast-in-place pile 201 is vertically arranged at one end of the shore foundation pit close to the road, and the right cast-in-place pile 202 is vertically arranged at the other end of the shore foundation pit relative to the left cast-in-place pile 201. A plurality of support structures 203 are arranged in the shore foundation pit at equal intervals along the axial direction of the left cast-in-place pile 201. The two ends of the support structure 203 are respectively connected to the left cast-in-place pile 201 and the right cast-in-place pile 202. The bottom surface of the right cast-in-place pile 202 is spaced 0.5 m from the nearest inclined anchor cable 3. It is worth noting that the support structure 203 of the present scheme is used to fix the structural strength of the left cast-in-place pile 201 and the right cast-in-place pile 202. The left cast-in-place pile 201 is used to reinforce the foundation structure strength on the road side to prevent the foundation on the road side from collapsing into the shore foundation pit. The right cast-in-place pile 202 is used to reinforce the foundation structure strength on the river bank side to prevent the foundation on the river bank side from collapsing into the foundation pit on the bank. The inclined anchor cable 3 and the right cast-in-place pile 202 are 0.5m apart in height, which means that the inclined anchor cable 3 and the right cast-in-place pile 202 do not interfere with each other. It is worth noting that the connection height of the inclined anchor cable 3 and the foundation is the same as the bottom surface height of the ground-connected wall pile 101, and the inclination angles of several inclined anchor cables 3 are the same.

[0046] In addition, the present scheme also includes a plurality of second foundation pit supports 4, there is a connecting space between two adjacent groups of first foundation pit supports 2, a plurality of connecting spaces are matched one-to-one with a plurality of second foundation pit supports 4, and any second foundation pit support 4 is arranged in the corresponding connecting space; the structure of the second foundation pit support 4 is consistent with the structure of the first foundation pit support 2, the length of the right cast-in-place pile 202 of the second foundation pit support 4 is longer than the length of the right cast-in-place pile 202 of the first foundation pit support 2, and the top surface height of the right cast-in-place pile 202 of the second foundation pit support 4 is equal to the top surface height of the right cast-in-place pile 202 of the first foundation pit support 2.

[0047] Correspondingly, a construction method of a bank-side sunken road combined support pile structure of the present scheme, and a road-through combined support pile structure of the present scheme, comprises the following steps:

[0048] S1: Two first cast-in-place grooves are dug at both ends of the foundation pit on the bank. A temporary support 5 is provided at the bottom of the cast-in-place groove close to the river bank. The temporary support 5 can separate the space of the first cast-in-place groove. A vertical through-tube 6 is provided on the temporary support 5. The two first cast-in-place grooves are cast by casting to form cast-in-place piles. The first cast-in-place groove without the through-tube 6 is the left cast-in-place pile 201, and the first cast-in-place groove with the through-tube 6 is the right cast-in-place pile 202. This step describes the formation of the left cast-in-place pile 201 and the right cast-in-place pile 202 of the first foundation pit support 2.

[0049] S2: Use a crane to lift the support structure 203 into the foundation pit on the shore, connect the support structure 203 to the left cast-in-place pile 201 by manual connection, and also provide a temporary connection 7, which connects the support structure 203 and the foundation pit on the shore respectively, and finally connects the support structure 203 to the right cast-in-place pile 202 by manual connection; this step describes the connection method of a single support structure 203. It should be noted that the purpose of providing the temporary connection 7 is to share the weight of the support structure 203 between the left cast-in-place pile 201 and the temporary support 5. In addition, due to the provision of the temporary support 5 and the connection between the support structure 203 and the right cast-in-place pile 202, the force of the right cast-in-place pile 202 on the temporary support 5 is reduced, thereby avoiding damage to the structure of the temporary support 5 and releasing the sealing matching state between the temporary support 5 and the corresponding first casting groove.

[0050] S3: installing a plurality of support structures 203 in sequence from bottom to top to complete the preliminary installation of a single first foundation pit support 2;

[0051] S4: Repeat the above steps S1-S3 to complete the preliminary installation of several first foundation supports.

[0052] It should be noted that the purpose of installing the first foundation pit support 2 first in this scheme is that since the distance between the shore foundation pit and the river bank is too close, the first foundation pit support 2 is installed first to reinforce the foundation structure of the shore foundation pit to prevent the foundation structure of the shore foundation pit from collapsing.

[0053] Next, after the preliminary installation of the first foundation pit support 2 is completed, the installation of the second foundation pit support 4 is started;

[0054] S5: After completing the preliminary installation of a single first foundation pit support 2, two second grouting grooves are excavated at both ends of the shore foundation pit, and the two second grouting grooves are grouted by grouting to form a left grouting pile 201 and a right grouting pile 202 of the second foundation pit support 4 respectively; since the second foundation pit support 4 has no positional interference relationship with the inclined anchor cable 3, the left grouting pile 201 and the right grouting pile 202 of the second foundation pit support 4 are buried at the same depth in the foundation.

[0055] S6: Use a crane to lift the support structure 203 of the second foundation pit support 4 into the foundation pit on the shore, and connect the two ends of the support structure 203 of the second foundation pit support 4 to the left cast-in-place pile 201 and the right cast-in-place pile 202 respectively by manual connection;

[0056] S7: installing the plurality of supporting structures 203 of the second foundation pit support 4 in sequence from bottom to top, and completing the installation of a single second foundation pit support 4;

[0057] S8: Repeat the above steps S5-S7 to complete the installation of several second foundation supports.

[0058] Next, after completing the structural reinforcement of the bank foundation pit, we began to reinforce the foundation structure of the river bank;

[0059] S10: A plurality of fixing grooves are dug on the river bank, and the plurality of fixing grooves are arranged at equal intervals in a direction perpendicular to the edge of the river bank, and cement is poured into the fixing grooves to form a plurality of ground-anchored wall piles 101;

[0060] S11: placing the unloading cap 102 on the river bank by hanging, and bonding the bottom surface of the steel bars to a plurality of ground anchor wall piles 101;

[0061] S12: several reinforced concrete seats 103 are installed on the unloading cap 102, and then several inclined anchor cables 3 in the same inclined anchor cable group are connected and installed respectively, so as to complete the installation of a single embankment support 1;

[0062] S13: Repeat the above steps S10-S12 to complete the installation of several bank supports 1.

[0063] Since the present scheme carries out foundation reinforcement at the river bank, when the foundation of the river bank is relatively soft, the right cast-in-place pile 202 of the first foundation pit support 2 cannot reinforce the foundation in the shore foundation pit due to its short length. Therefore, it is necessary to ensure that the length of the right cast-in-place pile 202 of the first foundation pit support 2 is the same as the length of the left cast-in-place pile 201 of the first foundation pit support 2.

[0064] Based on this, the present solution further includes the following steps in S12:

[0065] S121: After a single bank support 1 is installed, the drilling machine is extended to the temporary support 5 through the core pipe 6, and the temporary support 5 is drilled through, so that the spaces of the grouting grooves corresponding to the temporary support 5 are connected to each other;

[0066] S122: Filling cement into the pouring tank by pouring, until the pouring tank is fully filled;

[0067] S123: Finally, the temporary connection 7 provided on the bank support 1 is dismantled.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A bank-side sunken road combined support pile structure, characterized in that: It comprises a plurality of bank supports, a plurality of inclined anchor cable groups and a plurality of first foundation pit supports, wherein the plurality of bank supports are arranged on the foundation inside the river bank at equal intervals along the setting direction of the river bank, the plurality of inclined anchor cable groups are matched with the plurality of bank supports in a one-to-one correspondence, one end of any of the inclined anchor cable groups is connected to the corresponding bank support, and the other end thereof is connected to the foundation away from the river bank; A plurality of first foundation pit supports are matched one by one with a plurality of inclined anchor cable groups, and a plurality of first foundation pit supports are arranged in the shore foundation pit at equal intervals along the axis direction of the shore foundation pit, and the first foundation pit supports are located at the top of the corresponding inclined anchor cable groups and the two do not interfere with each other and overlap; The bank support includes a plurality of ground-connected wall piles, a load-relief pedestal and a plurality of reinforced concrete seats, wherein the load-relief pedestal is arranged on the river bank, and the plurality of ground-connected wall piles are buried deep in the river bank foundation at equal intervals in a direction perpendicular to the river bank, the top of the ground-connected wall piles is connected to the bottom of the load-relief pedestal, and the plurality of reinforced concrete seats are matched with the ground-connected wall piles one by one, and any of the reinforced concrete seats is arranged directly above the corresponding ground-connected wall pile, and the reinforced concrete seat is arranged on the top of the load-relief pedestal; The inclined-stayed anchor cable group includes a plurality of inclined-stayed anchor cables, the reinforced concrete seat and the unloading cap together form a slot hole with a certain inclination angle, the slot holes are matched with a plurality of inclined-stayed anchor cables one by one, any of the inclined-stayed anchor cables is arranged in the corresponding slot hole, the top of the inclined-stayed anchor cable is connected to the corresponding reinforced concrete seat, and the other end thereof extends out of the corresponding slot hole and is connected to the foundation away from the river bank; The first foundation pit support includes a left cast-in-place pile, a right cast-in-place pile and a plurality of supporting structures. The left cast-in-place pile is vertically arranged at one end of the shore foundation pit close to the road, and the right cast-in-place pile is vertically arranged at the other end of the shore foundation pit relative to the left cast-in-place pile. A plurality of supporting structures are arranged in the shore foundation pit at equal intervals along the axial direction of the left cast-in-place pile, and the two ends of the supporting structure are respectively connected to the left cast-in-place pile and the right cast-in-place pile, and the bottom surface of the right cast-in-place pile is 0.5m away from the nearest inclined anchor cable.

2. The bank-side sunken road combined support pile structure according to claim 1, characterized in that: The inclination angles of several inclined anchor cables are all the same.

3. The bank-side sunken road combined support pile structure according to claim 1 is characterized by: It also includes a plurality of second foundation pit supports, wherein a connection space is provided between two adjacent groups of the first foundation pit supports, the plurality of connection spaces are matched with the plurality of second foundation pit supports in a one-to-one correspondence, and any of the second foundation pit supports is arranged in a corresponding connection space; The structure of the second foundation pit support is consistent with that of the first foundation pit support, and the length of the right cast-in-place pile of the second foundation pit support is longer than the length of the right cast-in-place pile of the first foundation pit support.

4. A construction method for a bank-side sunken road combined supporting pile structure, applicable to the bank-side sunken road combined supporting pile structure according to claim 3, characterized in that: The following steps are involved: S1: Two first grouting grooves are dug at both ends of the foundation pit on the bank. A temporary support is provided at the bottom of the grouting groove close to the river bank. The temporary support can separate the space of the first grouting groove. A vertical through-tube is provided on the temporary support. The two first grouting grooves are grouted by grouting to form a cast-in-place pile. The first grouting groove without the through-tube is the left cast-in-place pile, and the first grouting groove with the through-tube is the right cast-in-place pile. S2: Use a crane to lift the support structure into the foundation pit on the shore, connect the support structure to the left cast-in-place pile by manual connection, and provide a temporary connection to connect the support structure and the foundation pit on the shore respectively, and finally connect the support structure to the right cast-in-place pile by manual connection; S3: installing a plurality of the support structures in sequence from bottom to top to complete the preliminary installation of a single first foundation pit support; S4: repeat the above steps S1-S3 to complete the preliminary installation of a plurality of first foundation supports; S5: After the preliminary installation of the single first foundation pit support is completed, two second pouring grooves are dug at both ends of the shore foundation pit, and the two second pouring grooves are poured by pouring to form a left cast-in-place pile and a right cast-in-place pile of the second foundation pit support respectively; S6: using a crane to lift the supporting structure of the second foundation pit support into the shore foundation pit, and manually connecting the two ends of the supporting structure of the second foundation pit support to the left cast-in-place pile and the right cast-in-place pile respectively; S7: installing the plurality of supporting structures of the second foundation pit support in sequence from bottom to top to complete the installation of a single second foundation pit support; S8: Repeat the above steps S5-S7 to complete the installation of a plurality of second foundation supports; S9: A plurality of fixing grooves are dug on the river bank, and the plurality of fixing grooves are arranged at equal intervals in a direction perpendicular to the edge of the river bank, and cement is poured into the fixing grooves to form a plurality of ground-anchored wall piles; S10: placing the unloading cap on the river bank by hanging, and bonding the bottom surface of the steel bar to a plurality of ground-anchored wall piles; S11: a plurality of reinforced concrete seats are installed on the unloading cap, and then a plurality of inclined anchor cables in the same inclined anchor cable group are connected and installed respectively, so as to complete the installation of a single bank support; S12: Repeat the above steps S9-S11 to complete the installation of several bank supports.

5. The construction method of a bank-sunken road combined supporting pile structure according to claim 4, characterized in that: In S11, the following steps are also included: S111: After a single bank support is installed, a drilling machine is extended to a temporary support through a core pipe, and the temporary support is drilled through, so that the spaces of the grouting grooves corresponding to the temporary support seals are connected to each other; S112: Filling cement into the pouring tank by pouring, until the pouring tank is fully filled.

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