WO2022045987A1

WO2022045987A1 - Continuous beam monorail structure and installation method

Info

Publication number: WO2022045987A1
Application number: PCT/TH2020/000062
Authority: WO
Inventors: Athasit SIRISONTHI
Original assignee: Sino-Thai Engineering & Construction Public Company Limited
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-03-03

Abstract

The continuous beam monorail structure has the first set of structural posts(600) having two bearing supports(400) supporting two guide-way beams(200) and the second of structural posts(500) having the inner pier segments(700) support positions and wet joints(901) linking two guide-way beams(200). The interiors of the guide-way beams(200) and the inner pier segments(700) have at least two ducts(800) which support insertion of the tendon group(900) to link the guide-way beams(200) and the inner pier segments(700) into a network. The method of installing continuous beam monorails has the following steps: (1) Install the inner pier segments(700); (2) Install the guide-way beams(200); (3) Pour the concrete at wet joints(901) to link joints between the guide-way beams(200) and inner pier segments(700); (4) Pull tendons selected from the tendon group(900) in the ducts(800); (5) Insert steel reinforcement and pour plinth concrete; (6) Pour grout concrete; (7) Remove the temporary support equipment; (8) Construct the diaphragm(300); (9) Install expansion joints as finger joints.

Description

CONTINUOUS BEAM MONORAIL STRUCTURE AND INSTALLATION METHOD

Branch of Science Associated with the Invention

Engineering in parts related to the continuous beam monorail structure and installation method.

Background of related art or science

A monorail is a type of rail transport system that differs from a conventional rail system with two assembled steel rails. A monorail car runs over a monorail. In the mass transit system, the electric car runs over a rail that is a beam.

Figure 1 Shows an image of the structural posts (100) in the previous invention for monorail construction, which consists of the following:

The step of preparing the construction site for placing structural posts (101).

The step of drilling to pour piles (102).

The step of casting piles (103).

The step of pouring concrete transition boxes around pile areas (104).

The step of constructing structural posts (100).

The step of installing concrete crossbeams (105) to support guide-way beam placement (200).

Structural posts (100) are arranged to create the monorail’s route. A number of structural posts (100) will support placement of a number of guide-way beams (200) to support electric railcar passage.

Figure 2 Shows an image of the monorail structure in the previous invention.

Structural posts (100) support two guide-way beams (200). Structural posts (100) consist of (See Figure 1):

The first structural post (111) supports placement of the first side of the first guide- way beam (201).

The second structural post (112) supports placement of the second side of the first guide-way beam (201).

The second structural post (112) supports placement of the first side of the second guide-way beam (202).

The third structural post (113) supports placement of the second side of the second guide-way beam (202).

The third structural post (113) supports placement of the first side of the third guide- way beam (203).

The fourth structural post (114) supports placement of the second side of the third guide-way beam (203).

The fourth structural post (114) supports placement of the first side of the fourth guide-way beam (204).

The fifth structural post (115) supports placement of the second side of the fourth guide- way beam (204).

The fifth structural post (115) supports placement of the first side of the fifth guide- way beam (205) (See Figure 4).

And the model is maintained as a network with these characteristics for a number of guide-way beams (200) to form a route for the monorail.

This invention has a disadvantage due to the large size of the guide-way beams (200) in the aforementioned invention, which causes production costs to escalate. This makes the structural posts (100) correspondingly large, which also increases production costs.

This invention has a concept to make guide-way beam production costs lower. A new structure called a continuous beam monorail structure was invented and designed with a smaller guide-way beam size, which reduces the size of structural posts, thereby reducing structural post production costs. Inner pier segments (See Figure 4) are installed at the top of structural posts to support connection to guide-way beams installed and connected to the left side and the right side of inner pier segments linked and assembled to the post-tensioning system using methods specifically for installing continuous beam monorails (See Figure 4).

In this invention, the continuous beam monorail structure and installation method is designed to have four guide- way beams in one module. The continuous beam monorail structure and installation method with four guide-way beams in one module has special characteristics such that the first set of structural posts has two structure bearing support positions supporting two guide-way beams and the second set of structural posts has one post that is an inner pier segment to link with two guide-way beams. Guide-way beams and inner pier segments will be linked and equipped with a post-tensioning system. The interiors of the guide-way beams and inner pier segments have at least two ducts that are more than or less than eight ducts of guide-way beams or an arrangement of at least two ducts that are more than or less than six ducts of inner pier segments which support insertion of the tendon group for linking the first guide-way beam, the second guide-way beam, the third guide-way beam, the fourth guide-way beam and the first inner pier segment, the second inner pier segment and the third inner pier segment into a network. The continuous beam monorail structure and installation method with four guide-way beams in one module has several modules that will link and become the monorail network.

Invention Characteristics and Objectives

The continuous beam monorail structure and installation method with four guide-way beams in one module has special characteristics such that the first set of structural posts has two structure bearing support positions supporting two guide-way beams and the second set of structural posts has one post that is an inner pier segment to link with two guide-way beams. Guide-way beams and inner pier segments will be linked and equipped with a post- tensioning system. The interiors of the guide-way beams and inner pier segments have at least two ducts that are more than or less than eight ducts of guide-way beams or an arrangement of at least two ducts that are more than or less than six ducts of inner pier segments which support insertion of the tendon group for linking the first guide-way beam, the second guide- way beam, the third guide-way beam, the fourth guide-way beam and the first inner pier segment, the second inner pier segment and the third inner pier segment into a network. The continuous beam monorail structure and installation method with four guide-way beams in one module has several modules that will link and become the monorail network.

This invention aims to make guide-way beam production costs lower. A new structure called a continuous beam monorail structure was invented and designed with a smaller guide- way beam size, which reduces the size of structural posts, thereby reducing structural post production costs. Inner pier segments are installed at the top of structural posts to support connection to guide-way beams installed and connected to the left side and the right side of inner pier segments linked and assembled to the post-tensioning system using methods specifically for installing continuous beam monorails.

Full Disclosure of Invention

The continuous beam monorail structure and installation method with four guide-way beams in one module has characteristics consisting of the following:

Figure 3 Shows an image of the structural posts (100) in this invention for monorail construction consisting of:

The step of preparing the construction site for placing structural posts (101).

The step of drilling to pour piles (102).

The step of casting piles (103).

The step of pouring concrete transition boxes around pile areas (104).

The step of constructing structural posts (100).

The step of installing concrete crossbeams (105) to support guide-way beam placement (200) (See Figure 4).

In this new invention from Figure 3 to Figure 8, numbers in the previous invention in Figure 1 and Figure 2 and numbers in the new invention from Figure 3 to Figure 8 are repeated for convenient comparison.

Figure 4 and Figure 5 show an image of the continuous beam monorail structure and installation method in this invention consisting of the following (See Figures 6-7):

The first set of structural posts (600) has two structure bearing support positions (400) supporting two guide-way beams (200). One bearing support (400) supports one guide-way beam (200).

The second set of structural posts (500) has one post that is an inner pier segment (700) to link with two guide-way beams (200). One guide-way beam is installed on the left side and one guide-way beam is installed on the right side.

The first set of structural posts (600) consists of the first structural post (111) and the fifth structural post (115).

The second set of structural posts (500) consists of the second structural post (112), the third structural post (1 13) and the fourth structural post (114).

The first structural post (111) has the second bearing support (402) on the second side for supporting placement of the first guide-way beam (201 ) on the first side.

The second structural post (112) has the first inner pier segment (701) to support installation of the first guide-way beam (201) on the second side.

The second structural post (112) has the first inner pier segment (701) to support installation of the second guide-way beam (202) on the first side.

The third structural post (113) has the second inner pier segment (702) to support installation of the second guide-way beam (202) on the second side.

The third structural post (113) has the second inner pier segment (702) to support installation of the third guide-way beam (203) on the first side.

The fourth structural post (114) has the third inner pier segment (703) to support installation of the third guide-way beam (203) on the second side.

The fourth structural post (114) has the third inner pier segment (703) to support installation of the fourth guide-way beam (204) on the first side.

The fifth structural post (115) has the first bearing support (401) on the first side to support placement of the fourth guide-way beam (204) on the second side.

The fifth structural post (115) has the second bearing support (402) on the second side to support placement of the fifth guide-way beam (205) on the first side, etc.

In short, the first set of structural posts (600) has two bearing supports (400) consisting of the first structural post ( 111) and the fifth structural post (1 15).

In short, the second set of structural posts (500) has inner pier segment (700) support positions consisting of the second structural post (112), the third structural post (113) and the fourth structural post ( 114). This invention uses the continuous beam monorail with four guide-way beams (200) which is a module with bearing support (400), the first inner pier segment (701), the second inner pier segment (702), the third inner pier segment (703) and bearing support (400) arranged in order.

And this type of network will be maintained in the second, third and fourth modules, etcetera, in order for a number of guide-way beams (200) to be arranged as the monorail’s route.

Construct the diaphragm (300). During construction, supports must be placed between the guide-way beams (200) on both sides to prevent the beams from moving toward each other in order to prevent damage to the diaphragm (300). The diaphragm (300) will be between the guide-way beams (200) to prevent the guide-way beams (200) from moving toward one another.

Figure 6, Figure 7 and Figure 8 show the structure of the guide-way beams (200) and inner pier segments (700) linked and assembled together with the post-tensioning system (See Figure 3-5).

The guide-way beams (200) are produced from pre-stressed concrete. The guide-way beams have length for installation in the distance between two structural posts in the first position and in the second position.

The interiors of the guide-way beams have the first upper row of ducts (800) consisting of the first duct (801) and the second duct (802) placed on the upper plane with a shaft from one end of the guide-way beam (200) to the second end of the guide-way beam (200) functioning to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide- way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network (See Figure 4).

A set of tendons (900) link at least one pair of guide-way beams (200) together. For example, one set of tendons (900) links the first guide-way beam (201) and the second guide- way beam (202), etc.

The interiors of the guide-way beams (200) have the second middle row of ducts (800) consisting of the third duct (803) and the fourth duct (804) placed on the middle plane with a shaft formed from one end toward a position of the guide -way beam’s body (200) ending at the end of the third duct (803) and the fourth duct (804) within the body of the guide-way beams functioning to support insertion of the tendon group (900) to link the guide-way beams (200) to the inner pier segments (700).

The interiors of guide-way beams (200) have the third lower row of ducts (800) consisting of the fifth duct (805) and the sixth duct (806) placed on the lower plane with a shaft from one end of the guide-way beam (200) to the second end of the guide-way beam (200) functioning to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide- way beam (202), the third guide-way beam (203), the fourth guide-way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network (See Figure 4).

The interiors of guide-way beams (200) have the fourth lower row of ducts (800) consisting of the seventh duct (807) and the eighth duct (808) placed on the lower plane with a shaft from one end of the guide-way beam (200) to the second end of the guide-way beam (200) functioning to support the weight of guide-way beams in order to transport and install.

The interiors of guide-way beams (200) have the fifth lower row of ducts (800) consisting of the ninth duct (809) placed on the lower plane with a shaft formed from one end into a position of the guide-way beam’s body (200) and ended at the end of the ninth duct (809). The interiors of guide-way beams (200) function to support insertion of the tendon group (900) to link guide-way beams (200) to inner pier segments (700).

The guide-way beams (200) and inner pier segments (700) are linked and equipped with the post-tensioning system and wet joints (901) for linking joints between guide-way beams (200) and inner pier segments (700).

Figure 8 shows the structure of inner pier segment (700) structure produced from pre- stressed concrete as a vertical post for installing and supporting a number of guide-way beams (200) (See Figure 3-7).

The interiors of inner pier segments (700) have the first upper row of ducts (800) consisting of the first duct (801) and the second duct (802) placed on the upper plane with a shaft from one end of the inner pier segment (700) to the second end of the inner pier segment (700) functioning to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide-way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The interiors of inner pier segments (700) have the second middle row of ducts (800) consisting of the third duct (803) and the fourth duct (804) placed on the middle plane with a shaft from one end of the inner pier segment (700) to the second end of the inner pier segment (700) to support insertion of the tendon group (900) to link guide-way beams (200) to inner pier segments (700).

The interiors of inner pier segments (700) have the third lower row of ducts (800) consisting of the fifth duct (805) and the sixth duct (806) placed on the lower plane with a shaft from one end of the inner pier segment (700) to the second end of the inner pier segment (700) functioning to support insertion of the tendon group (900) to link the first guide- way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide- way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The positions of the first duct (801), the second duct (802), the third duct (803), the fourth duct (804), the fifth duct (805) and the sixth duct (806) of guide-way beams (200) and the first duct (801), the second duct (802), the third duct (803), the fourth duct (804), the fifth duct (805) and the sixth duct (806) of inner pier segments (700) are on a matching plane to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide-way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The abovementioned invention is only one example and a principle experimented in engineering and found to be good and suitable on an international level.

The first duct (801), the second duct (802), the third duct (803), the fourth duct (804), the fifth duct (805), the sixth duct (806), the seventh duct (807), the eight duct (808) and the ninth duct (809) have the shape determined by outer edges that are a geometric shape and the interiors are arranged to be hollow.

However, the arrangement of at least two ducts (800) that are more than or less than eight ducts (800) of the guide-way beams (200) or an arrangement of at least two ducts (800) that are more than or less than six ducts (800) of inner pier segments (700) is considered successful in this invention.

However, the arrangement of a number of guide-way beams (200) with more than or less than four beams in one module and inner pier segments (700) with more than or less than three posts in one module linked as a network is also considered successful in this invention.

Figure 3 and Figure 4 Show the method for installing a continuous beam monorail with characteristics consisting of the first set of structural posts (600), which has two positions for bearing support structures (400) that support two guide-way beams (200), and the second set of structural posts (500) with support positions that are inner pier segments (700) linking two guide-way beams (200).

(See Figure 5, Figure 6 and Figure 7) Guide-way beams (200) and inner pier segments (700) are linked and equipped with a post tensioning system. The interiors of the guide-way beams (200) and inner pier segments (700) have the first upper row of ducts (800) consisting of the first duct (801) and the second duct (802), which support insertion of the tendon group (900). The interiors of the guide-way beams (200) and inner pier segments (700) have the second middle row of ducts (800) consisting of the third duct (803) and the fourth duct (804) that support insertion of the tendon group (900). The interiors of the guide-way beams (200) and inner pier segments (700) have the third lower row of ducts (800) consisting of the fifth duct (805) and the sixth duct (806) that support insertion of the tendon group (900). All structures link the first guide-way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide-way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) into a network.

The method of installing continuous beam monorails has the following steps:

Figure 4 Shows an image of Step 1 - Install the inner pier (700) on temporary support for each post for the continuous span.

Figure 4 Shows an image of Step 2 - Install guide-way beams (200) in each span. Guide-way beams (200) are installed by using cranes to lift and assemble. Guide-way beams (200) are placed on temporary support capable of adjusting level and incline.

Figure 4 Shows an image of Step 3 - When levels and positions have been adjusted, concrete is poured at wet joints (901) to link joints between the guide-way beams (200) and inner pier segments (700).

Figure 5, Figure 6 and Figure 7 (See Figure 4) Show an image of Step 4 when compressive strength of wet joint (901) concrete is achieved by pulling the tendon group (900) in Step 4 and selecting from the tendon group (900) inside the first duct (801), the second duct (802), the third duct (803), the fourth duct (804), the fifth duct (805), the sixth duct (806) and the ninth duct (809), in that order, until all tendons in the tendon group have been pulled.

Arrange for at least two ducts (800) at more or less than eight ducts (800) of the guide-way beams (200) and arrange for at least two ducts (800) at more or less than six ducts (800) of the inner pier segments (700). In pulling tendons (900) in Step 4, tendons are selected in order from the first ducts (800) to the last ducts (800) according to the aforementioned plans until all tendons in the tendon group (900) have been pulled.

Step 5 - Insert steel reinforcements for casting in the place of plinth concrete according to design specifications.

Pour plinth concrete by allowing for levels. Pour the upper level to be lower than the bottom plate of bearing. Pouring is to begin at Type FS before Type GS by leaving gaps between non-shrink grout.

Step 6 - Pour grout concrete at Bearing FS at the inner pier segments (700) and structural post (100) positions) (See Figure 4). When the plinth concrete strength exceeds 80 percent of the concrete’s compressive strength, pour grout concrete at the remaining gaps under the pot bearing using either non- shrink grout, cement or synthetic adhesive materials or a combination of the aforementioned materials.

When the plinth concrete and non-shrink grout strength or cement or synthetic adhesive materials or a combination have the specified strength value, bearing locks will be removed.

Step 7 - Remove temporary support equipment for installing guide-way beams (200).

Step 8 - Construct the diaphragm (300). During construction, supports must be placed between the guide-way beams (200) on both sides to prevent the beams from moving toward each other in order to prevent damage to the diaphragm (300).

Step 9 - Install expansion joints as finger joints.

Brief Description of Drawing

Figure 1 Shows an image of structural posts (100) in the previous invention for monorail construction.

Figure 2 Shows an image of the monorail structure in the previous invention.

Figure 3 Shows an image of the structural posts (100) in this invention for monorail construction.

Figure 4 Shows an image of the continuous beam monorail construction in this invention.

Figure 5 Shows an image of the structure of the continuous beam monorail similar to Figure 4 in this invention.

Figure 6 Shows the structure of continuous guide-way beams (200) in this invention.

Figure 7 Shows an expanded image of the structure of the continuous guide-way beams (200) similar to Figure 6 in this invention.

Figure 8 Shows the structure of continuous beam inner pier segments (700) in this invention. Best Invention Method

As mentioned in the section of the complete disclosure of the invention.

Claims

1.The continuous beam monorail structure and installation method has characteristics consisting of:

The step of preparing the construction site for placing structural posts (101).

The step of drilling to pour piles (102).

The step of casting piles (103).

The step of pouring concrete transition boxes around pile areas (104).

The step of constructing structural posts (100).

Special characteristics consist of the following:

The first set of structural posts (600) has two bearing supports (400) supporting two guide-way beams (200).

The second set of structural posts (500) has the inner pier segment (700) support positions and wet joints (901) linking two guide-way beams (200).

The guide-way beams (200) and inner pier segments (700) are linked and assembled together with a post-tensioning system.

The interiors of the guide-way beams have the first upper row of ducts (800) consisting of the first duct (801) and the second duct (802) placed on the upper plane with a shaft from one end of the guide-way beam (200) to the second end of the guide-way beam (200) functioning to support insertion of the tendon group (900) to link the first guide- way beam (201), the second guide- way beam (202), the third guide-way beam (203), the fourth guide-way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The interiors of the guide-way beams (200) have the second middle row of ducts (800) consisting of the third duct (803) and the fourth duct (804) placed on the middle plane with a shaft formed from one end toward a position of the guide-way beam’s body (200) ending at the end of the third duct (803) and the fourth duct (804) within the body of guide-way beams functioning to support insertion of the tendon group (900) to link guide-way beams (200) and wet joints (901) to the inner pier segments (700).

The interiors of the guide-way beams (200) have the third lower row of ducts (800) consisting of the fifth duct (805) and the sixth duct (806) placed on the lower plane with a shaft from one end of the guide-way beam (200) to the second end of the guide-way beam

(200) functioning to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide-way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The interiors of the inner pier segments (700) have the first upper row of ducts (800) consisting of the first duct (801) and the second duct (802) placed on the upper plane with a shaft from one end of the inner pier segment (700) to the second end of the inner pier segment (700) functioning to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide- way beam (202), the third guide- way beam (203), the fourth guide- way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The interiors of the inner pier segments (700) have the second middle row of ducts (800) consisting of the third duct (803) and the fourth duct (804) placed on the middle plane with a shaft from one end of the inner pier segment (700) to the second end of the inner pier segment (700) to support insertion of the tendon group (900) to link the first guide-way beam

(201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide- way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The interiors of the inner pier segments (700) have the third lower row of ducts (800) consisting of the fifth duct (805) and the sixth duct (806) placed on the lower plane with a shaft from one end of the inner pier segment (700) to the second end of the inner pier segment (700) functioning to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide- way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

The positions of the first duct (801), the second duct (802), the third duct (803), the fourth duct (804), the fifth duct (805) and the sixth duct (806) of guide-way beams (200) and the first duct (801), the second duct (802), the third duct (803), the fourth duct (804), the fifth duct (805) and the sixth duct (806) of the inner pier segments (700) are on a matching plane to support insertion of the tendon group (900) to link the first guide-way beam (201), the second guide-way beam (202), the third guide-way beam (203), the fourth guide-way beam (204) and the first inner pier segment (701), the second inner pier segment (702) and the third inner pier segment (703) as a network.

2. The continuous beam monorail structure and installation method in Claim 1 is such that the structural posts (100) consist of the following:

The first structural post (111) has the second bearing support (402) on the second side for supporting placement of the first guide-way beam (201) on the first side.

The fifth structural post (115) has the second bearing support (402) on the second side to support placement of the fifth guide-way beam (205) on the first side.

3. The continuous beam monorail structure and installation method in Claims 1-2 is such that:

The first set of structural posts (600) has two bearing supports (400) consisting of the first structural post (111) and the fifth structural post (115).

The second set of structural posts (500) has inner pier segment (700) support positions consisting of the second structural post (112), the third structural post (113) and the fourth structural post (114).

The diaphragm (300) will be between the guide-way beams (200) to prevent the guide-way beams (200) from moving toward one another.

4.The continuous beam monorail structure and installation method in Claims 1-3 is such that the continuous beam monorail with four guide-way beams is a module with bearing support (400), the first inner pier segment (701), the second inner pier segment (702), the third inner pier segment (703) and bearing support (400), respectively.

5. The continuous beam monorail structure and installation method in Claims 1-4 is such that the interiors of guide-way beams (200) have the fourth lower row of ducts (800) consisting of the seventh duct (807) and the eighth duct (808) placed on the lower plane with a shaft from one end of the guide-way beam (200) to the second end of the guide-way beam (200) functioning to support the weight of guide-way beams in order to transport and install.

6. The continuous beam monorail structure and installation method in Claims 1-5 is such that The interiors of guide-way beams (200) have the fifth lower row of ducts (800) consisting of the ninth duct (809) placed on the lower plane with a shaft formed from one end into a position of the guide-way beam’s body (200) and ended at the end of the ninth duct (809). The interiors of guide-way beams (200) function to support insertion of the tendon group (900) to link guide-way beams (200) to inner pier segments (700) and wet joints (901).

7. The continuous beam monorail structure and installation method in Claims 1-6 is such that at least two ducts (800) or more than or less than eight ducts (800) of guide-way beams (200) have a shape determined by outer edges that are a geometric shape and the interiors are arranged to be hollow.

8. The continuous beam monorail structure and installation method in Claims 1-7 is such that at least two ducts (800) or more than or less than six ducts (800) of inner pier segments (700) have a shape determined by outer edges that are a geometric shape and the interiors are arranged to be hollow.

9. The continuous beam monorail structure and installation method in Claims 1-8 is such that:

A number of guide-way beams (200) has more than or less than four beams in one module.

A number of inner pier segments (700) has more than or less than three beams in one module.

10. The continuous beam monorail structure and installation method in Claims 1-9 is such that a group of tendons (900) link at least one pair of guide-way beams (200) together.

1 l .The continuous beam monorail structure and installation method in Claims 1-10 is such that has the following steps:

Step 1 - Install the inner pier (700) on temporary support for each post for the continuous span.

Step 2 - Install the guide-way beams (200) for each span. The guide-way beams (200) are installed by using a crane to lift and assemble. Guide-way beams (200) are placed on temporary support capable of adjusting level and incline.

Step 3 - When the levels and positions have been adjusted, concrete is poured at wet joints (901) to link the joints between the guide-way beams (200) and inner pier segments (700).

Step 4 - When the compressive strength of the wet joint (901) concrete is achieved by pulling the tendon group (900) in Step 4 and selecting from the tendon group (900) inside the first duct (801), second duct (802), third duct (803), fourth duct (804), fifth duct (805), sixth duct (806) and ninth duct (809), in that order, until all tendons in the tendon group have been pulled.

Arrange for at least two ducts (800) at more or less than eight ducts (800) of the guide-way beams (200) and arrange for at least two ducts (800) at more or less than six ducts (800) of the inner pier segments (700). In pulling tendons (900) in Step 4, the tendons are selected in order from the first ducts (800) to the last ducts (800) according to the aforementioned plans until all tendons in the tendon group (900) have been pulled.

Step 5 - Insert steel reinforcements for casting in the place with plinth concrete according to the design specifications.

Step 6 - Pour grout concrete at Bearing FS at inner pier segments (700) and structural post (100) positions).

When the plinth concrete strength exceeds 80 percent of the concrete’s compressive strength, pour grout concrete at the remaining gaps under the pot bearing using either non- shrink grout, cement or synthetic adhesive materials or a combination of the aforementioned materials.

Step 7 - Remove the temporary support equipment for installing the guide-way beams (200).

Step 9 - Install expansion joints as finger joints.