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Precautions for relay rooms

Precautions for relay rooms

  • Categories:news
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  • Time of issue:2020-10-11 10:10
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(Summary description)1. The relay room should not exceed 20 cm each time, too large will cause the shear force to increase, and the shear wedge and other facilities will be difficult. 2. The steel sheath is designed to prevent soil from intruding into the box. Therefore, the width of the plate is determined by the jack extension plus 15 cm of overlap to prevent soil from intruding. The thickness of the plate is generally 8-10 mm. Bolts with a pitch of 20 to 35 cm are fixed on the box of the forward section. 3. The number of jacks is determined according to the required jacking force. 4. There are two ways to place the jack: (1) At the end of the box bottom of the forward section of the relay room, the steel bars are cut off to leave the pick socket, and then the jack is placed in the pick socket for jacking. After the jacking is completed, the cut steel bars are welded and the concrete is poured to restore the original appearance of the box. . (2) The jack is placed on the bottom plate of the box culvert, and the top wall is built at the end of the bottom plate. The cross-section size of the top wall and the number of shear steel bars to be placed are determined according to the size of the jacking force. After jacking, the top wall is chiseled off. 5. At the relay joint, the connection of the water stop belt is very important. For example, if the water stop belt is not installed according to the general joint treatment, the uneven settlement of the structure often causes the joint water stop to fail. Therefore, it is best to reserve a gap and then set a rubber waterstop, so that the waterstop can not only stop the water but also meet the settlement requirements of the structure. 6. When prefabricating the main structure, bolts should be pre-embedded at the same time, holes and slots should be reserved, steel sheath bottom plate and pouring top wall should be set, or pick sockets should be reserved.

Precautions for relay rooms

(Summary description)1. The relay room should not exceed 20 cm each time, too large will cause the shear force to increase, and the shear wedge and other facilities will be difficult.

2. The steel sheath is designed to prevent soil from intruding into the box. Therefore, the width of the plate is determined by the jack extension plus 15 cm of overlap to prevent soil from intruding. The thickness of the plate is generally 8-10 mm. Bolts with a pitch of 20 to 35 cm are fixed on the box of the forward section.

3. The number of jacks is determined according to the required jacking force.

4. There are two ways to place the jack:

(1) At the end of the box bottom of the forward section of the relay room, the steel bars are cut off to leave the pick socket, and then the jack is placed in the pick socket for jacking. After the jacking is completed, the cut steel bars are welded and the concrete is poured to restore the original appearance of the box. .

(2) The jack is placed on the bottom plate of the box culvert, and the top wall is built at the end of the bottom plate. The cross-section size of the top wall and the number of shear steel bars to be placed are determined according to the size of the jacking force. After jacking, the top wall is chiseled off.

5. At the relay joint, the connection of the water stop belt is very important. For example, if the water stop belt is not installed according to the general joint treatment, the uneven settlement of the structure often causes the joint water stop to fail. Therefore, it is best to reserve a gap and then set a rubber waterstop, so that the waterstop can not only stop the water but also meet the settlement requirements of the structure.

6. When prefabricating the main structure, bolts should be pre-embedded at the same time, holes and slots should be reserved, steel sheath bottom plate and pouring top wall should be set, or pick sockets should be reserved.

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2020-10-11 10:10
  • Views:
Information
1. The relay room should not exceed 20 cm each time, too large will cause the shear force to increase, and the shear wedge and other facilities will be difficult.
 
2. The steel sheath is designed to prevent soil from intruding into the box. Therefore, the width of the plate is determined by the jack extension plus 15 cm of overlap to prevent soil from intruding. The thickness of the plate is generally 8-10 mm. Bolts with a pitch of 20 to 35 cm are fixed on the box of the forward section.
 
3. The number of jacks is determined according to the required jacking force.
 
4. There are two ways to place the jack:
 
(1) At the end of the box bottom of the forward section of the relay room, the steel bars are cut off to leave the pick socket, and then the jack is placed in the pick socket for jacking. After the jacking is completed, the cut steel bars are welded and the concrete is poured to restore the original appearance of the box. .
 
(2) The jack is placed on the bottom plate of the box culvert, and the top wall is built at the end of the bottom plate. The cross-section size of the top wall and the number of shear steel bars to be placed are determined according to the size of the jacking force. After jacking, the top wall is chiseled off.
 
5. At the relay joint, the connection of the water stop belt is very important. For example, if the water stop belt is not installed according to the general joint treatment, the uneven settlement of the structure often causes the joint water stop to fail. Therefore, it is best to reserve a gap and then set a rubber waterstop, so that the waterstop can not only stop the water but also meet the settlement requirements of the structure.
 
6. When prefabricating the main structure, bolts should be pre-embedded at the same time, holes and slots should be reserved, steel sheath bottom plate and pouring top wall should be set, or pick sockets should be reserved.
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