JPH09296416A - Diagonally hanging structure and construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure and the construction method by which the efficiency of the local joining work is greatly increased, by fitting one-touch type insertion members and socket members without welding processes in the connection and extention works of main girders or the main towers and increasing the freedom degrees of absorption of errors in the extensible direction. SOLUTION: In the main girder of a diagonally hanging structure, a cable stayed bridge, for instance, the unit structure in the main girder construction section is constituted of a hollow socket member 3, an insertion member 5 fitted in the socket member 3, and diagonally tensed cables 6 connected to the socket member 3. The main tower constituting the cable stayed bridge is constituted likewise. And the unit structures of the main girder construction section and the main tower construction section are extended one by one to construct a cable stayed bridge. Since the main girder and the main tower of the cable stayed bridge receive the axial compression and the sectional force of the bending owing to the tension of the cable 6, a reliable one-touch type low-cost joint structure can be obtained and the executive efficiency is also high.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cable-stayed suspension structure and a construction method thereof in the fields of civil engineering, architecture and bridges.

[0002]

2. Description of the Related Art Conventional concrete cable-stayed bridges are, for example,
As disclosed in Japanese Examined Patent Publication No. 7-21165, a construction was made by constructing a melanin material for each girder construction section of a cable-stayed bridge, holding the cable with a cable-stayed cable, and sequentially extending the melanin material.

[0003]

However, the technique described in the above publication has the following problems. That is, 1. Normally, the joining and stretching of the melanin material for each construction category is welding or bolting at the top end of the melanin material on site, and it takes time and labor to perform dangerous melanin material joining and diagonal cable connection holding work at high places. 2. At the time of joining and stretching the melanin for each construction segment, the accuracy of the stretching direction accuracy at the joint of the melanin material on site cannot be corrected by normal welding or bolt joining, and complicated construction and poor quality of construction can be performed on site. Will lead to higher prices at the same time.

The present invention was created in view of the above-mentioned problems of the prior art, and its purpose is to:
Connection extension of the main girder and main tower of the cable-stayed suspension structure is done by connecting the one-touch type insertion member and the socket member without welding to increase the degree of freedom in absorbing the error in the extension direction. It is an object of the present invention to provide a structure of a cable-stayed suspension frame that dramatically improves the efficiency of connection work and a method for constructing the structure.

[0005]

In order to solve the above-mentioned problems, the present invention provides an insertion member or socket of a main girder combination unit member composed of an insertion member and a socket member in a main girder structure of a cable-stayed suspension frame. It is characterized in that a unit main girder construction section is configured by connecting and holding members by a cable-stayed cable. Therefore, the socket member exhibits excellent joint performance as a site joint required for each construction unit of the main girder structure of the cable-stayed frame subject to large axial force and bending, and at the same time, the joint portion can be processed easily and at low cost. it can. Further, the cable-stayed cable has a safe and highly reliable joint in which force is applied in the pushing direction opposite to the direction in which the socket member is pulled out.

In order to solve the above-mentioned problems, the present invention is a method of constructing a main girder structure of a cable-stayed suspension frame, wherein after inserting and inserting an insertion member and a socket member for each unit main girder construction section, insertion is performed. It is characterized in that the unit main girder construction section is sequentially extended while the member or socket member is connected and held by the cable-stayed cable. Therefore, the socket member can be easily inserted during high-force strong work at the time of extension of the main girder, and by introducing the connection pulling force of the cable-stayed cable, it is possible to perform a reliable and rapid construction in the safe direction in which there is no fear of slipping out. In addition, prefabricated construction of main girder construction for cable-stayed suspension frames will be possible.

Further, in order to solve the above-mentioned problems, the present invention is a main tower structure of a cable-stayed suspension frame, in which an insertion member or a socket member of a main tower combination unit member composed of an insertion member and a socket member is obliquely attached. It is characterized in that a unit main tower construction section is configured by connecting and installing cables. Therefore, the socket member exhibits excellent joint performance as a site joint required for each construction unit of the main tower structure of the cable-stayed frame subject to a large axial force and bending, and at the same time, the joint portion can be easily processed at low cost. it can. Further, the cable-stayed cable has a safe and highly reliable joint in which force is applied in the pushing direction opposite to the direction in which the socket member is pulled out.

In order to solve the above-mentioned problems, the present invention is a method of constructing a main tower structure of a cable-stayed suspension frame, in which an insertion member and a socket member are fitted and stacked for each unit main tower construction section, and then inserted. It is characterized in that the unit main tower construction section is gradually increased while connecting and installing the cable-stayed cable to the member or the socket member. Therefore, the socket member can be easily inserted during a strong wind work at a high place at the time of stacking the main tower, and by introducing the connection pulling force of the cable-stayed cable, it is possible to perform a reliable and rapid construction in a safe direction without fear of coming out. In addition, prefabricated construction of the main tower construction for cable-stayed suspension frames will be possible.

In order to solve the above-mentioned problems, the present invention is, in a structure of a cable-stayed suspension frame, an insertion member or a socket member of a main girder combination unit member composed of an insertion member and a socket member, and an insertion member. It is characterized in that a unit construction section is configured by connecting and installing a cable-stayed cable to each of the insertion member or the socket member of the main tower combination unit member configured by the socket member. Therefore, by installing tension cables and installing tension cables to the main girder and the main tower, respectively, the force in the pushing direction is simultaneously introduced to the main girder socket member and the main tower socket member, and the exit safety as a joint is safe. The nature is enhanced.

Further, in order to solve the above-mentioned problems, the present invention provides a method for constructing a cable-stayed suspension frame, wherein an insert member for a unit main girder member in which an insert member and a socket member are fitted and extended for each unit main girder construction section. Or, the unit construction section is constructed sequentially by connecting and installing cable-stayed cables to each of the insertion member or socket member of the unit main tower member in which the socket member and the insertion member and the socket member are fitted and stacked for each unit main tower construction section. It is characterized by doing. Therefore, the main girder and the main tower will be constructed at the same time, and the cable-stayed bridge will be fully prefabricated. In addition, construction at the site can be performed efficiently.

Since the concrete is filled and solidified inside the insertion member or in the clearance formed by the insertion member and the socket member, a clearance is provided at the insertion connection portion of the socket member and the insertion member to cure the amorphous shape of concrete or the like. By filling and solidifying the material, manufacturing errors and construction errors of joint members can be absorbed and corrected, and at the same time, a joint with high strength and high reliability can be easily constructed. Also, inside the insertion member,
Alternatively, since the clearance formed by the insertion member and the socket member, or the radial gap formed by the insertion member and the socket member is filled with mortar and solidified, the main girder connection extension and the main tower connection of the cable-stayed suspension frame are connected. The stretching usually requires frequent correction of the error in the stretching direction, and in the conventional welded joints and bolt joints, the joint part correction process in the field alignment was complicated and often adversely affects the joint quality. The socket joint connection system can be easily corrected by providing a clearance between the insertion member and the socket member, and the joint structure can be constructed by mortar filling and solidifying after the correction. Further, since the stopper is provided on the outer circumference of the insertion member or the inner circumference of the socket member, both members can be positioned when the insertion member is fitted into the socket member.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. The cable-stayed suspension structure of the present invention is applied to various structures such as cable-stayed bridges and suspension ridges that support a girder by a cable-stayed cable. An embodiment applied to a bridge will be described. Figure 1 shows the center span 400
3 is a side view showing the overall structure of a cable-stayed bridge having a length of m, a side span of 200 m, and a total length of 800 m, and FIG. 2 is a partially cutaway perspective view showing a main part of the first embodiment of the main girder, and FIG. [FIG. 3] is a partial cross-sectional view of a main part of a main girder. In the figure, a main girder, which is one component of a cable-stayed bridge, is composed of a hollow socket member 3 having a back surface portion 1 and a front surface portion 2, and an insertion member 5 fitted into the socket member 3. Both the socket member 3 and the insertion member 5 have a steel pipe structure. On the outer periphery of the socket member 3, a connector 7 having a hole for connecting the cable-stayed cable 6 is fixed. A unit main girder construction division structure is configured by the socket member 3, the insertion member 5 fitted and inserted in the socket member 3, and the cable-stayed cable 6 connected to the socket member 3 or the insertion member 5, and the unit construction division structure The main girder of the cable-stayed bridge will be constructed by sequentially extending the. The main girder of the cable-stayed bridge receives axial compression and bending cross-sectional force due to the tension of the cable stayed cable, so there is no inconvenience even with a socket joint that is weak in pulling out pulling force, and a highly reliable one-touch low It can be a cost joint structure. As shown in FIG. 2, the main girders are extended in parallel and the horizontal connecting members 8 are bridged and fixed. Reference numeral 10 is a floor slab.

When inserting the insertion member 5 into the socket member 3, if there is a gap between the two members, it is possible to obtain an extremely high-strength and highly reliable joint by filling and solidifying the gap with an irregular hardening material such as mortar. It can be constructed and at the same time can increase the main girder holding force of the cable-stayed cable. Further, as shown in FIG. 3, a stopper 11 such as a partition plate for stopping and fixing the end portion of the insertion member 5 in the socket member 3 when the insertion member 5 is fitted and inserted into the inner periphery of the socket member 3. It is fixed. The stopper 11 may be an annular flange. Further, since the stopper 11 is for positioning between the insertion member 5 and the socket member 3, an annular flange may be fixedly provided on the outer periphery of the insertion member 5. In order to position and fix the insertion member 5 and the socket member 3, it is a similar technique to fill and solidify the above-mentioned irregular shaped hardening material such as mortar into the gap, so the stopper is not always an essential constituent element.

In the main girder connection extension of a cable-stayed bridge, it is usually necessary to frequently correct the error in the extension direction, and in conventional welded joints and bolt joints, it is complicated to correct the joint portion in the field and the joint quality is adversely affected. However, the socket joint connection system of the present invention can easily correct the error in the extending direction by providing the insertion member 5 and the socket member 3 with the clearance 12 as shown in FIG. By filling and solidifying the mortar 99, a joint structure without any worries can be constructed.

Since a large axial force is applied from the cable-stayed cable 6 to the main girder of the cable-stayed bridge, concrete 9 is filled and solidified in the insertion member 5 in the main girder or the clearance 12 between the insertion member 5 and the socket member 3. This makes it possible to construct a high-strength and highly reliable main girder, and at the same time, to absorb and correct design errors and construction errors of joint members. In addition, when a concrete-filled steel pipe structure in which the inner surfaces of the main girder insertion member 5 and the socket member 3 are filled with concrete is used, or even a steel-framed concrete structure in which concrete is double-covered on the outer periphery of the main girder has high strength and high reliability. Digits can be built.

Next, an embodiment of the main tower, which is one component of the cable-stayed bridge, will be described with reference to FIG. Similarly to the main girder, the main tower also includes a hollow socket member 53 having a back surface portion 51 and a front surface portion 52, and an insertion member 55 fitted and inserted into the socket member 53. Both the socket member 53 and the insertion member 55 have a steel pipe structure. On the outer periphery of the socket member 53, a connector 57 having a hole for connecting the cable-stayed cable 6 is fixedly installed. In this embodiment, the number of connecting members 57 is two.
Although individually fixed, the number may be one or three or more. The socket member 53, the insertion member 55 fitted and inserted in the socket member 53, and the socket member 53 or the insertion member 55.
The cable-stayed cable 6 connected to the above constitutes a unit main tower construction division structure, and the main tower of the cable-stayed bridge is constructed by sequentially extending the unit construction division structure. And, the main tower of the cable-stayed bridge receives cross-sectional force of axial compression and bending in the main tower due to the tension of the cable-stayed cable, so there is no inconvenience even with socket joints that are weak in pulling out pulling force, and highly reliable one-touch low-touch. It can be a cost joint structure.
Further, as shown in FIG. 5, the main tower is also extended in parallel, and a horizontal connecting member 58 is bridged and fixed.

When the insertion member 55 is inserted into the socket member 53, if there is a radial gap between the two members, it is extremely strong and highly reliable if the gap is filled and solidified with an amorphous hardening material such as mortar. It is possible to build a joint and at the same time enhance the main tower holding power of the cable-stayed cable. Further, as shown in FIG. 3, a stopper 11 such as a partition plate for stopping and fixing the end portion of the insertion member 55 in the socket member 53 when the insertion member 55 is fitted and inserted into the inner periphery of the socket member 53. It is fixed. The stopper 11 may be an annular flange.
Further, the stopper 11 includes the insertion member 55 and the socket member 5
Since it is for positioning between the insertion member 55 and the insertion member 3, it may be fixed to the outer periphery of the insertion member 55. In order to position and fix the insertion member 55 and the socket member 53, it is a similar technique to fill and solidify the above-mentioned indeterminate hardening material such as mortar into the gap, so the stopper is not always an essential constituent element.

In the extension of the cable-stayed bridge connected to the main tower, it is usually necessary to frequently correct the error in the extension direction. With conventional welded joints and bolt joints, it is complicated to correct the joint portion in the field and the joint quality is adversely affected. However, in the socket joint connection system of the present invention, by providing the insertion member 55 and the socket member 53 with the clearance 12 as shown in FIG. By filling and solidifying the mortar 99, a joint structure without any worries can be constructed.

Since a large axial force is applied from the cable-stayed cable 6 to the main tower of the cable-stayed bridge, the insertion member 55 in the main tower or the clearance 12 between the insertion member 55 and the socket member 53 is filled with concrete 9 and solidified. Then, a high-strength and highly reliable main tower can be constructed, and at the same time, design errors and construction errors of joint members can be absorbed and corrected.

Next, construction, which is a method of constructing a cable-stayed bridge in which main girders and main towers are combined, will be described with reference to FIGS. 6 and 7. FIG. 6 shows the construction of the main girder, and FIG. 7 shows the construction of the main tower. (First Step) First, as shown in FIGS. 6 and 7, a main tower foundation 13 is constructed, and a lower main tower 14 is erected on it. (Second Step) Next, as shown in FIG. 6, the insertion member 5 of the main head of the main girder is set, and the insertion member 5 is attached by covering the back surface portion 1 of the socket member 3. Here, if there is a radial gap between the insertion member 5 and the socket member 3, the rear surface portion 1 of the socket member 3 is filled and solidified with an amorphous hardening material such as mortar. Next, the lower connector 57 of the lower main tower 14 and the connector 6 of the socket member 3 of the main girder are connected by the cable-stayed cable 7 (primary tension). Here, when it is desired to increase the strength of the insertion member 5, the inside of the insertion member 5 is filled with concrete and solidified, and then the tension degree of the cable-stayed cable is adjusted again (secondary tension). (Third step) Next, as shown in FIG. 6, the second insertion member 5'is inserted into the front surface portion 2 of the socket member 3. Then, when correcting the extension accuracy of the main girder, the front portion 2 of the socket member 3 is filled with mortar and solidified. (Fourth Step) Next, as shown in FIG. 6, the back surface of the second socket member 3'is placed over the second insertion member 5 '. Here, if there is a radial gap between the second insertion member 5'and the second socket member 3 ', the mortar
The inside of the back surface of the socket member 3'is filled and solidified. Next, the upper connecting member 57 'of the lower main tower 14 and the connecting member of the second socket portion 3'are connected by the cable-stayed cable 6' (primary tension). Here, if it is desired to increase the strength of the second insertion member 5 ', concrete is filled and solidified in the second insertion member 5', and then the tension degree of the cable-stayed cable 7 is adjusted again (secondary tension). . (Fifth Step) Next, as shown in FIG.
The insertion member 35 is fitted into the inside of the connector 4. (Sixth Step) Then, as shown in FIG. 7, the back surface 31 of the socket member 33 is covered and attached to the insertion member 35. After the 6th step, the same unit main tower construction section and main girder construction section are repeated, and the main tower and main girder are sequentially extended.

It should be noted that the main tower can be constructed independently and the main girder can be constructed independently for each unit construction section structure by using a suspension wire or the like. However, as mentioned above, the main tower structure is also a structure conforming to the main girder structure. By constructing the unit main girder construction structures in parallel at the same time, the entire cable-stayed bridge can be constructed more efficiently.

FIG. 8 shows a second embodiment of the main girder. The second embodiment uses a square steel pipe of a steel pipe as the insertion member 25, and the socket member 23 has a large joint structure performance because the closed cross-section structure of the square steel pipe can strongly constrain the insertion member from the periphery. Then, a clearance is provided at the insertion connection portion between the socket member 23 and the insertion member 25 to fill and solidify an irregular shaped hardening material such as mortar 99 or concrete 9 so that manufacturing errors and construction errors of the joint member can be absorbed and corrected, and at the same time high strength can be achieved. It is easy to build a highly reliable joint.

FIG. 9 shows a third embodiment of the main girder. The third embodiment uses H-section steel as the insertion member 35. Then, a clearance is provided at the insertion connection portion between the socket member 33 and the insertion member 35 to provide the mortar 9
By filling and solidifying an indeterminate hardening material such as 9 or concrete 9, manufacturing errors and construction errors of the joint member can be absorbed and corrected, and at the same time, a joint having high strength and high reliability can be easily constructed.

FIG. 10 shows a fourth embodiment of the main girder. The fourth embodiment uses a square steel material or a precast concrete beam as the insertion member 45,
Further, as the socket member 43, a closed cross-section structure such as a square steel material or a precast concrete beam can strongly restrain the insertion member from the periphery, and thus exhibits a large joint structure performance. And
By providing a clearance at the insertion connecting portion of the socket member 43 and the insertion member 45 and filling and solidifying an indeterminate hardening material such as mortar 99 or concrete 9, it is possible to absorb and correct manufacturing error and construction error of the joint member, and at the same time high strength and high strength. A reliable joint can be easily constructed. FIG. 11 shows a fifth embodiment of the main girder, in which the outer circumference of the main girder is covered with concrete to form a steel concrete structure. Thereby, a main girder structure having higher strength and higher reliability can be obtained. In addition, in this embodiment, the main girder has the structure of the third embodiment shown in FIG. 9, but it may be a main girder of another structure of the present invention.

[0025]

Since the present invention is constructed as described above, the following excellent effects can be obtained.

Connection of main girder and main tower of cable-stayed suspension structure The connection is a connection structure in which the insertion member and the socket member of the one-touch type are used for the extension work, and the flexibility in absorbing the error in the extension direction is large. The work efficiency can be dramatically improved.

Since the main girder and main tower of the cable-stayed suspension frame are subjected to axial compression and bending sectional forces in the direction of the main girder and main tower, there is no inconvenience even with socket joints that are weak in pulling out pulling force, and highly reliable one-touch Can be a low cost joint.

When the clearance between the insertion member and the socket member is filled and solidified with an indeterminate hardening material such as mortar or concrete, an extremely high-strength and highly reliable joint can be constructed, and at the same time, the main girder of the cable-stayed cable and the main tower can be constructed. The holding power can be increased. Further, the socket joint filled with mortar or the like has a large degree of error absorption freedom, and at the same time, an excellent cable-stayed frame structure can be constructed, which enables efficient and easy construction work.

[Brief description of drawings]

FIG. 1 is a side view showing an overall structure of a cable-stayed bridge according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a main part of the first embodiment of the main girder.

FIG. 3 is a partial cross-sectional view of an essential part of an embodiment of a main girder.

FIG. 4 is a partial cross-sectional view of a main portion of another embodiment of the main girder.

FIG. 5 is a partially cutaway perspective view showing a main part of an embodiment of a main tower.

FIG. 6 is an explanatory view showing a procedure for constructing a main girder.

FIG. 7 is an explanatory diagram showing a procedure for constructing a main tower.

FIG. 8 is a partially cutaway perspective view showing a main part of a second embodiment of a main girder.

FIG. 9 is a partially cutaway perspective view showing an essential part of a third embodiment of a main girder.

FIG. 10 is a partially cutaway perspective view showing a main part of a fourth embodiment of a main girder.

FIG. 11 is a partially cutaway perspective view showing an essential part of a fifth embodiment of a main girder.

[Explanation of symbols]

 3, 23, 33, 43, 53 ... Socket member 5, 25, 35, 45, 55 ... Insert member 6, 6 '... Cable-stayed cable 7, 57, 57' ... Connecting tool 8, 58 ... Horizontal connecting member 9 ... Concrete 11 ... Stopper 12 ... Clearance 13 ... Main tower foundation 14 ... Lower main tower 99 ... Mortar

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Reiko Amano No. 19-1 Tobita, 2-chome, Chofu City, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Takehiro Hisashi Takenaka 2-1-1, Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Center

Claims (12)

[Claims] 1. In the main girder structure of a cable-stayed suspension frame, the unit main girder construction classification is achieved by connecting and holding the insertion member or socket member of the main girder combination unit member composed of the insertion member and the socket member with a cable-stayed cable. The main girder structure of the cable-stayed suspension frame, which is characterized in that 2. A method for constructing a main girder structure of a cable-stayed suspension frame, wherein after inserting and extending an insert member and a socket member for each unit main girder construction section, the insert member or the socket member is connected and held by a cable-stayed cable. However, the method of constructing the main girder structure of the cable-stayed suspension frame is characterized by sequentially extending the unit main girder construction sections. 3. In a main tower structure of a cable-stayed suspension frame, a unit main tower construction section is constructed by connecting and installing a cable-stayed cable to an insert member or socket member of a main tower combination unit member composed of an insert member and a socket member. The main tower structure of the cable-stayed suspension frame, which is characterized by 4. A method of constructing a main tower structure of a cable-stayed suspension frame, wherein after inserting and stacking an insertion member and a socket member for each unit main tower construction section, a cable-stayed cable is connected and installed to the insertion member or the socket member. However, the construction method of the main tower structure of the cable-stayed suspension frame is characterized by gradually increasing the unit main tower construction classification. 5. A structure of a cable-stayed suspension frame, wherein an insert member or socket member of a main girder combination unit member composed of an insert member and a socket member, and a main tower combination unit member composed of an insert member and a socket member. A structure of a cable-stayed suspension structure, in which a unit construction section is configured by connecting and installing a cable-stayed cable to each of the insertion member or the socket member. 6. A method for constructing a cable-stayed suspension frame, wherein an insert member or socket member of a unit main girder member obtained by fitting and extending an insert member and a socket member for each unit main girder construction section, and each unit main tower construction section. A cable-stayed suspension structure characterized by sequentially constructing unit construction sections by connecting and installing cable-stayed cables to each of the insert member or socket member of the unit main tower member in which the insert member and the socket member are fitted and stacked. How to build. 7. The slant according to claim 1, wherein concrete is filled and solidified in the inside of the insert member or in the clearance formed by the insert member and the socket member. Suspended frame structure. 8. The slant according to claim 2, wherein concrete is filled and solidified in the inside of the insertion member or in the clearance formed by the insertion member and the socket member. How to build a suspension frame. 9. The mortar is filled and solidified inside the insert member, the clearance formed by the insert member and the socket member, or the radial gap formed by the insert member and the socket member. The structure of the cable-stayed suspension frame according to any one of claims 1, 3, and 5. 10. The mortar is filled and solidified inside the insert member, the clearance formed by the insert member and the socket member, or the radial gap formed by the insert member and the socket member. Claims 2, 4,
The method for constructing a cable-stayed suspension frame according to any one of 6 and 8. 11. A stopper is provided on the outer circumference of the insertion member or the inner circumference of the socket member.
5. The structure of the cable-stayed suspension frame according to any one of 5 and 7. 12. A stopper is provided on the outer circumference of the insertion member or the inner circumference of the socket member.
The method for constructing a cable-stayed suspension frame according to any one of 6 and 8.