Receiving well end reinforcing structure
By setting up grouting reinforcement and steel pipe support structures outside the foundation pit enclosure structure of the receiving well, the problems of dangerous situations such as sand and water surge during the excavation of the foundation pit of the receiving well are solved, and the soil in the tunnel excavation range is strengthened. , ensuring the security of shield reception.
Patent Information
- Application Number
- CN202420950951.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-06
AI Technical Summary
During the construction of shield structures passing through large span rivers, dangerous situations such as sand and water surges and rock formation surges are prone to occur during the excavation of the foundation pit of the receiving well, resulting in major safety hazards in the reception of shield structures.
Grouting reinforcement is arranged on the outside of the side of the enclosure structure of the receiving well foundation pit near the tunnel, and the grouting reinforcement cross section surrounds the tunnel cross section. By setting up the first to third steel pipe inner support structure, grouting reinforcement is placed, and grouting reinforcement is formed. Located in the medium-coarse gravel layer and the stroked limestone layer to ensure soil reinforcement.
The soil around the tunnel excavation range has been effectively reinforced, the safety of shield receiving has been improved, and dangerous situations such as sand and water gushing are avoided.
Smart Images
Figure CN222206392U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of receiving well foundation pit reinforcement, in particular to a receiving well end head reinforcement structure. Background Art
[0002] Thermal pipelines crossing large-span rivers are usually constructed using the shield and casing method. The tunnel is designed with two holes and two pipes (one for the water supply pipe and one for the return pipe), and a starting well and a receiving well are set at both ends of the shield tunnel. For the receiving wells set near the river, the excavation process of the foundation pit is prone to multiple dangerous situations such as sand and water gushing, rock strata gushing, etc., which makes the shield receiving a major safety hazard. Therefore, water-stopping measures must be taken for the end strata before receiving.
[0003] Therefore, there is a need for a receiving well end reinforcement structure that can solve the above problems. Summary of the invention
[0004] The purpose of the utility model is to provide a receiving well end reinforcement structure based on the above-mentioned deficiencies of the prior art, and to arrange a grouting reinforcement body on the outside of the side of the retaining structure of the receiving well foundation pit close to the tunnel, so that the grouting reinforcement body can reinforce the soil around the tunnel excavation range and ensure the safety of the shield receiving.
[0005] The purpose of this utility model is achieved by the following technical solutions:
[0006] A receiving well end reinforcement structure, characterized in that it includes a grouting reinforcement body, which is arranged on the outside of the side of the retaining structure of the receiving well foundation pit close to the tunnel, and the cross-section of the grouting reinforcement body surrounds the cross-section of the tunnel. The first steel pipe diagonal support, the second steel pipe inner support and the third steel pipe inner support are arranged in sequence from top to bottom in the receiving well foundation pit, the top surface of the grouting reinforcement body is located between the second steel pipe inner support and the third steel pipe inner support, and the bottom surface of the grouting reinforcement body is located between the bottom surface of the receiving well foundation pit and the bottom surface of the retaining structure.
[0007] The soil of the receiving well foundation pit is composed of a plain fill layer, a medium-coarse sand layer, a silty clay layer, a medium-coarse gravel layer and a medium-weathered limestone layer from top to bottom.
[0008] A slope is provided at the bottom of the foundation pit of the receiving well near the retaining structure.
[0009] The top of the slope is flush with the top surface of the medium-weathered limestone layer.
[0010] The first steel pipe diagonal brace is connected to the enclosure structure through a crown beam, the second steel pipe inner support is connected to the enclosure structure through a purlin, and the third steel pipe inner support is connected to the enclosure structure through a waist beam, and the waist beam is arranged at the top of the slope.
[0011] The grouting reinforcement body is arranged in the medium-coarse gravel layer and the medium-weathered limestone layer, and the tunnel is arranged in the medium-weathered limestone layer.
[0012] The utility model has the advantages that a grouting reinforcement body is arranged outside a side of the receiving shaft enclosure structure close to the tunnel, and the grouting reinforcement body realizes the reinforcement of the soil around the tunnel excavation range, thereby ensuring the safety of shield receiving. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a plan view of the reinforcement structure of the receiving well end of the utility model;
[0014] Figure 2 It is a longitudinal section view of the receiving well end reinforcement structure of the utility model. DETAILED DESCRIPTION
[0015] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:
[0016] like Figure 1-2 As shown, the marks in the figure represent respectively:
[0017] Grouting reinforcement body 1, retaining structure 2, tunnel 3, first steel pipe diagonal brace 4, second steel pipe inner support 5, third steel pipe inner support 6, plain fill layer 7, medium-coarse sand layer 8, silty clay layer 9, medium-coarse gravel layer 10, medium-weathered limestone layer 11, outer wall 12, slope 13, crown beam 14, surrounding purlin 15, waist beam 16.
[0018] Example: Figure 1-2 As shown, the present embodiment relates to a receiving well end reinforcement structure, which mainly includes a grouting reinforcement body 1. The grouting reinforcement body 1 is arranged on the outside of one side of the retaining structure 2 of the receiving well foundation pit close to the tunnel 3 (two oppositely arranged), and the cross section of the grouting reinforcement body 1 surrounds the cross section of the tunnel 3. The grouting reinforcement body 1 is obtained by grouting, and can realize the reinforcement of the soil around the tunnel excavation range. In this embodiment, the length, width and height of the grouting reinforcement body 1 are 17.08m, 8.2m and 8.04m respectively, the diameter of the tunnel 3 is 3.54m, and the cross section of the grouting reinforcement body 1 is 3m on the left and right of the outer contour line of the tunnel 3, 3m on the top, and 1.5m on the bottom.
[0019] like Figure 1-2As shown, the soil of the receiving well foundation pit is composed of a plain fill layer 7, a medium-coarse sand layer 8, a silty clay layer 9, a medium-coarse gravel layer 10 and a medium-weathered limestone layer 11 from top to bottom. The bottom of the retaining structure 2 is embedded in the medium-weathered limestone layer 11 and is located above the bottom of the receiving well foundation pit. A slope 13 is provided at the bottom of the receiving well foundation pit near the retaining structure 2. The top of the slope 13 is flush with the top surface of the medium-weathered limestone layer 11 and is used to support the retaining structure 2. A vertical shaft is installed at the bottom of the receiving well foundation pit, and the outer wall 12 of the vertical shaft is arranged close to the slope 13. The first steel pipe diagonal brace 4, the second steel pipe internal support 5 and the third steel pipe internal support 6 are arranged in sequence from top to bottom in the receiving well foundation pit. The first steel pipe diagonal brace 4 is connected to the retaining structure 2 through a crown beam 14, the second steel pipe internal support 5 is connected to the retaining structure 2 through a purlin 15, and the third steel pipe internal support 6 is connected to the retaining structure 2 through a waist beam 16, and the waist beam 16 is arranged at the top of the slope 13. The first steel pipe diagonal brace 4, the second steel pipe internal support 5 and the third steel pipe internal support 6 are all used to support the retaining structure 2. The top surface of the grouting reinforcement body 1 is arranged in the medium-coarse gravel layer 10 and is located between the second steel pipe inner support 5 and the third steel pipe inner support 6. The bottom surface of the grouting reinforcement body 1 is arranged in the medium-weathered limestone layer 11 and is located between the bottom surface of the receiving well foundation pit and the bottom surface of the retaining structure 2. The grouting reinforcement body 1 is arranged in the medium-coarse gravel layer 10 and the medium-weathered limestone layer 11, and the tunnel 3 is arranged in the medium-weathered limestone layer 11.
[0020] The beneficial technical effect of this embodiment is that a grouting reinforcement body is arranged on the outside of the receiving shaft's retaining structure on one side close to the tunnel, and the grouting reinforcement body reinforces the soil around the tunnel excavation range, thereby ensuring the safety of the shield receiving.
[0021] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.
Claims
1. A receiving well head reinforcement structure, characterized in that: It includes a grouting reinforcement body, which is arranged on the outside of the side of the retaining structure of the receiving well foundation pit close to the tunnel. The cross-section of the grouting reinforcement body surrounds the cross-section of the tunnel. The first steel pipe diagonal support, the second steel pipe inner support and the third steel pipe inner support are arranged in sequence from top to bottom in the receiving well foundation pit. The top surface of the grouting reinforcement body is located between the second steel pipe inner support and the third steel pipe inner support, and the bottom surface of the grouting reinforcement body is located between the bottom surface of the receiving well foundation pit and the bottom surface of the retaining structure.
2. A receiving well end reinforcement structure as claimed in claim 1, characterized in that: The soil of the receiving well foundation pit is composed of a plain fill layer, a medium-coarse sand layer, a silty clay layer, a medium-coarse gravel layer and a medium-weathered limestone layer from top to bottom.
3. A receiving well head reinforcement structure as claimed in claim 2, characterized in that: A slope is provided at the bottom of the foundation pit of the receiving well near the retaining structure.
4. A receiving well end reinforcement structure as claimed in claim 3, characterized in that: The top of the slope is flush with the top surface of the medium-weathered limestone layer.
5. A receiving well end reinforcement structure as claimed in claim 3, characterized in that: The first steel pipe diagonal brace is connected to the enclosure structure through a crown beam, the second steel pipe inner support is connected to the enclosure structure through a purlin, and the third steel pipe inner support is connected to the enclosure structure through a waist beam, and the waist beam is arranged at the top of the slope.
6. A receiving well end reinforcement structure as claimed in claim 2, characterized in that: The grouting reinforcement body is arranged in the medium-coarse gravel layer and the medium-weathered limestone layer, and the tunnel is arranged in the medium-weathered limestone layer.