Treatment and construction method of small underground river water in highway tunnel

Abstract

The present invention discloses a construction method for treating water gushing from a small underground river in a highway tunnel. The method comprises the following steps: 1. Determining the underground river construction section and drilling location, creating an arc-shaped surrounding groove around the drilling location and embedding an arc-shaped steel plate within the groove; 2. Determining the underground river's flow area and inserting water retaining plates from low to high; 3. Drilling equipment drills a hole in the underground river construction section until water flows, allowing it to stand until the flow subsides, and then continuing to drill the entire hole to form an underground river channel; 4. Creating installation slots around the underground river channel and installing a reinforcement mesh on the inner wall of the underground river channel through the installation slots; 5. Removing the water retaining plates in the underground river's flow area from low to high; 6. Monitoring the water flow rate of the underground river channel over a unit time period and obtaining the corresponding monitoring value; if the monitored value does not meet the design requirements of the underground river channel, a drainage channel is constructed at the bottom of the underground river channel. This method can improve safety during underground river construction.

Description

Technical Field

[0001] The present invention relates to a construction method for an underground river channel, and in particular to a construction method for treating water gushing from a small underground river in a highway tunnel. Background Art

[0002] Underground rivers, also known as "underground streams", are water flows that occur in caves and underground passages formed in large areas of limestone due to karst action and have the main characteristics of rivers.

[0003] Patent publication number CN105888693A discloses a construction method for treating water gushing from a small underground river in a highway tunnel, comprising the following steps: (1) pre-grouting reinforcement with a small conduit; (2) excavation; (3) water gushing treatment; (4) laying of culverts at the bottom of the tunnel; and (5) water supply. This construction method has the following problems: during the excavation process, water can accumulate and gush out in large quantities during the drilling process. This large amount of gushing water can easily impact construction workers, posing a significant safety hazard.

[0004] Therefore, it is necessary to provide a construction method for treating water gushing from small underground rivers in highway tunnels with high construction safety. Summary of the Invention

[0005] The purpose of the present invention is to provide a construction method for treating water gushing from a small underground river in a highway tunnel, which can improve the safety during construction of the underground river.

[0006] The present invention is achieved in that:

[0007] A construction method for treating water gushing from a small underground river in a highway tunnel comprises the following steps:

[0008] Step 1: Pre-embed the steel frame formwork: First determine the underground river construction section, then determine the drilling location, open an arc-shaped enclosing groove around the drilling location, and embed the arc-shaped steel plate into the arc-shaped enclosing groove;

[0009] Step 2: Pre-water retaining treatment: Determine the flow area of ​​the underground river and intercept the water source in the flow area. Insert and fix the retaining plate in the flow area. Install the retaining plate from low to high.

[0010] Step 3: Grooving: Use drilling equipment to drill holes in the underground river construction section until water flows through the holes. Wait until the water flow becomes smaller, and then continue to complete the overall drilling of the underground river construction section to form a dark river channel.

[0011] Step 4: Reinforcement: Open several installation slots around the underground river channel. After the installation slots are opened, install the reinforcement net on the inner wall of the underground river channel through the installation slots;

[0012] Step 5: Dismantle the water retaining plate: In the flow area of ​​the underground river, dismantle the installed water retaining plate from the lowest to the highest position;

[0013] Step 6: Monitor water flow: Monitor the water flow of the underground river channel within a unit time and obtain the corresponding monitoring values; if the monitored values ​​do not meet the design requirements of the underground river channel, open a drainage channel at the bottom of the underground river channel.

[0014] In step 1, the width of the arc-shaped enclosing groove is 10-15 cm, and the depth of the arc-shaped enclosing groove is 5-8 cm.

[0015] In the step 2, the embedding depth of the water retaining plate is 90-150 cm.

[0016] In step 3, the drilling speed of the drilling equipment is 200-250 r / min, and the standing time is 30-50 min.

[0017] In step 4, the diameter of the installation slot is 3-6 cm.

[0018] In step 6, the depth of the drainage channel is 10-15 cm, and the width of the drainage channel is 5-7 cm.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adopts pre-embedded steel frame formwork and pre-water retaining treatment. The embedded steel frame formwork can reinforce the soil before the drilling construction of the underground river channel. The water flow of the underground river is intercepted by the setting of the water retaining plate, avoiding the impact of water gushing during the drilling construction of the underground river channel on the construction progress. At the same time, it also avoids the impact of gushing water on the personnel who are working, improves the safety of construction, and is conducive to ensuring the construction progress and construction quality of the underground river.

[0021] 2. The present invention adopts the drilling and waiting method to drill the underground river channel area, that is, after drilling until water flow appears, it is left to stand still, and then the drilling operation in the underground river channel area is continued after the water flow becomes smaller. This reduces the construction difficulty, avoids the impact of gushing water on construction personnel, improves construction safety, and also facilitates external personnel to carry out construction operations.

[0022] 3. The present invention reinforces the inner wall of the underground river channel, reduces the falling of gravel and soil in the underground river channel through the reinforcement net, and improves the construction safety during the removal of the water retaining plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a flow chart of a construction method for treating water gushing from a small underground river in a highway tunnel. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Please see the attached Figure 1 A construction method for treating water gushing from a small underground river in a highway tunnel comprises the following steps:

[0026] Step 1: Pre-embed the steel frame formwork. Specifically, first determine the underground river construction section, then determine the drilling location. After confirmation, open an arc-shaped enclosing groove of a certain width around the drilling location, and embed an arc-shaped steel plate into the arc-shaped enclosing groove to form a steel frame formwork.

[0027] In step 1, the width of the arc-shaped enclosing groove is 10-15 cm, and the depth of the arc-shaped enclosing groove is 5-8 cm.

[0028] Reinforcing the drill hole with an arc-shaped enclosing groove and its embedded arc-shaped steel plate improves drilling safety while also ensuring efficiency and quality. The size of the arc-shaped enclosing groove is determined based on the hole diameter and the actual geological conditions during construction, and the size of the arc-shaped steel plate matches the size of the arc-shaped enclosing groove.

[0029] Step 2: Pre-water retaining treatment. Specifically, determine the flow area of ​​the underground river and intercept the water source in the flow area. Embed a water retaining plate of a certain depth in the flow area and fix the edge of the water retaining plate to the surrounding structure through connecting bolts. The water retaining plate should be installed from low to high.

[0030] In the step 2, the embedding depth of the water retaining plate is 90-150 cm.

[0031] The installation of a water retaining plate can block the flow of water in the underground river, preventing the impact of the water flow on the construction workers during the drilling process, thereby ensuring the construction workers' safety and the normal and safe progress of the drilling operation, which is conducive to ensuring the quality of the drilling construction. The water retaining plate can be made of metal plate, and the size and specifications of the water retaining plate can be selected according to the area of ​​the underground river and the water flow conditions.

[0032] Step 3: Grooving treatment. Specifically, use drilling equipment to drill holes in the underground river construction section until water flows in the holes. Let it stand for a period of time until the water flow becomes smaller, and then continue to complete the overall drilling treatment of the underground river construction section to form an underground river channel.

[0033] In step 3, the drilling speed of the drilling equipment is 200-250 r / min, and the standing time is 30-50 min.

[0034] Drilling equipment can use existing drilling instruments. During the drilling process, the drilling speed should be controlled in combination with the hole diameter, hole depth, geological conditions, etc. to ensure the safety of drilling construction. At the same time, after drilling, the water flow should be allowed to decrease and then continue drilling. The water flow should be reduced to a level that meets the requirements for safe drilling construction. Drilling construction is carried out in a waiting manner. This not only avoids construction difficulties, but also enhances construction safety and facilitates construction operations by external personnel. Due to the interception effect of the water retaining plate, the water flow will gradually decrease after drilling. The specific water flow rate can be determined according to the drilling construction requirements to ensure the construction safety of subsequent drilling operations.

[0035] Step 4: Reinforcement treatment. Specifically, several installation slots are opened around the underground river channel. After the installation slots are opened, the reinforcement net is installed on the inner wall of the underground river channel through the installation slots.

[0036] In step 4, the diameter of the mounting slots should be limited to a specified range, determined by the specifications and dimensions of the connectors connecting the mounting slots and the reinforcement mesh. The diameter of the mounting slots is 3-6 cm, and the number of mounting slots can be adjusted based on the size of the underground waterway. The reinforcement mesh improves the structural strength of the underground waterway and prevents the fall of sand, gravel, and soil from the inner wall of the underground waterway. The diameter of the internal micropores of the reinforcement mesh must be limited to a specified range, determined by the particle size of the sand, gravel, and soil to be blocked.

[0037] Step 5: Remove the water retaining plate. Specifically, in the flow area of ​​the underground river, remove the installed water retaining plate. The removal should be carried out from low to high.

[0038] After the drilling operation and reinforcement work are completed, the water retaining plate can be removed to restore the intercepted underground river water flow. In order to ensure the safety when restoring the water flow, the water retaining plate should be removed from bottom to top.

[0039] Step 6: Monitor water flow. Specifically, monitor the water flow of the underground river channel within a unit time and obtain the corresponding monitoring values. When the monitored values ​​do not meet the design requirements of the underground river channel, a drainage channel is opened at the bottom of the underground river channel, and the depth and width of the drainage channel are controlled within the specified range.

[0040] After the water flow in the underground river channel is restored, the water flow rate should be monitored to ensure that the construction of the underground river channel meets the design requirements. In step 6, the depth of the drainage channel is 10-15 cm and the width of the drainage channel is 5-7 cm.

[0041] Example 1:

[0042] Please see the attached Figure 1 A construction method for treating water gushing from a small underground river in a highway tunnel comprises the following steps:

[0043] Step 1: Pre-embed the steel frame formwork: first determine the underground river construction section, then determine the drilling location, open an arc-shaped enclosing groove with a width of 10 cm and a depth of 5 cm around the drilling location, and embed the arc-shaped steel plate into the arc-shaped enclosing groove.

[0044] Step 2: Pre-water retaining treatment: Determine the flow area of ​​the underground river and intercept the water source in the flow area. Embed a water retaining plate with a depth of 90 cm in the flow area and fix the edge of the water retaining plate to the surrounding structure through connecting bolts. The water retaining plate should be installed from low to high.

[0045] Step 3: Grooving treatment: Use drilling equipment to drill holes at a speed of 200r / min in the underground river construction section until water flows in the borehole. After standing for 30 minutes, the water flow becomes smaller. Then continue to complete the overall drilling treatment of the underground river construction section to form an underground river channel.

[0046] Step 4: Reinforcement: Open several installation slots with a diameter of 3 cm around the underground river channel. After the installation slots are opened, install the reinforcement net on the inner wall of the underground river channel through the installation slots.

[0047] Step 5: Remove the water retaining plate: In the flow area of ​​the underground river, remove the installed water retaining plate, and remove it from the low to the high.

[0048] Step 6: Monitor water flow: Monitor the flow rate of the underground river channel over a specific time period and obtain the corresponding monitoring value. If the monitored value does not meet the design requirements of the underground river channel, a drainage channel with a depth of 10 cm and a width of 5 cm will be opened at the bottom of the underground river channel.

[0049] Example 2:

[0050] Please see the attached Figure 1 A construction method for treating water gushing from a small underground river in a highway tunnel comprises the following steps:

[0051] Step 1: Pre-embed the steel frame formwork: first determine the underground river construction section, then determine the drilling location, open an arc-shaped enclosing groove with a width of 13 cm and a depth of 6.5 cm around the drilling location, and embed the arc-shaped steel plate into the arc-shaped enclosing groove.

[0052] Step 2: Pre-water retaining treatment: Determine the flow area of ​​the underground river and intercept the water source in the flow area. Embed a water retaining plate with a depth of 120 cm in the flow area and fix the edge of the water retaining plate to the surrounding structure with connecting bolts. The water retaining plate should be installed from low to high.

[0053] Step 3: Grooving treatment: Use drilling equipment to drill holes at a speed of 230r / min in the underground river construction section until water flows in the borehole. After standing for 40 minutes, the water flow becomes smaller. Then continue to complete the overall drilling treatment of the underground river construction section to form an underground river channel.

[0054] Step 4: Reinforcement treatment: Open several installation slots with a diameter of 4.5 cm around the underground river channel. After the installation slots are opened, install the reinforcement net on the inner wall of the underground river channel through the installation slots.

[0055] Step 5: Remove the water retaining plate: In the flow area of ​​the underground river, remove the installed water retaining plate, and remove it from the low to the high.

[0056] Step 6: Monitor water flow: Monitor the flow rate of the underground river channel over a specific time period and obtain the corresponding monitoring value. If the monitored value does not meet the design requirements of the underground river channel, a drainage channel with a depth of 13 cm and a width of 6 cm will be opened at the bottom of the underground river channel.

[0057] Example 3:

[0058] Please see the attached Figure 1 A construction method for treating water gushing from a small underground river in a highway tunnel comprises the following steps:

[0059] Step 1: Pre-embed the steel frame formwork: first determine the underground river construction section, then determine the drilling location, open an arc-shaped enclosing groove with a width of 15 cm and a depth of 8 cm around the drilling location, and embed the arc-shaped steel plate into the arc-shaped enclosing groove.

[0060] Step 2: Pre-water retaining treatment: Determine the flow area of ​​the underground river and intercept the water source in the flow area. Embed a water retaining plate with a depth of 150 cm in the flow area and fix the edge of the water retaining plate to the surrounding structure with connecting bolts. The water retaining plate should be installed from low to high.

[0061] Step 3: Grooving treatment: Use drilling equipment to drill holes at a speed of 250r / min in the underground river construction section until water flows in the borehole. After standing for 50 minutes, the water flow becomes smaller. Then continue to complete the overall drilling treatment of the underground river construction section to form an underground river channel.

[0062] Step 4: Reinforcement treatment: Open several installation slots with a diameter of 6 cm around the underground river channel. After the installation slots are opened, install the reinforcement net on the inner wall of the underground river channel through the installation slots.

[0063] Step 5: Remove the water retaining plate: In the flow area of ​​the underground river, remove the installed water retaining plate, and remove it from the low to the high.

[0064] Step 6: Monitor water flow: Monitor the flow rate of the underground river channel over a specific time period and obtain the corresponding monitoring value. If the monitored value does not meet the design requirements of the underground river channel, a drainage channel with a depth of 15 cm and a width of 7 cm will be opened at the bottom of the underground river channel.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction method for treating water gushing from a small underground river in a highway tunnel, characterized by: The following steps are involved: Step 1: Pre-embed the steel frame formwork: First determine the underground river construction section, then determine the drilling location, open an arc-shaped enclosing groove around the drilling location, and embed the arc-shaped steel plate into the arc-shaped enclosing groove; Step 2: Pre-water retaining treatment: Determine the flow area of ​​the underground river and intercept the water source in the flow area. Insert and fix the retaining plate in the flow area. Install the retaining plate from low to high. Step 3: Grooving: Use drilling equipment to drill holes in the underground river construction section until water flows through the holes. Wait until the water flow becomes smaller, and then continue to complete the overall drilling of the underground river construction section to form a dark river channel. Step 4: Reinforcement: Open several installation slots around the underground river channel. After the installation slots are opened, install the reinforcement net on the inner wall of the underground river channel through the installation slots; Step 5: Dismantle the water retaining plate: In the flow area of ​​the underground river, dismantle the installed water retaining plate from the lowest to the highest position; Step 6: Monitor water flow: Monitor the water flow of the underground river channel within a unit time and obtain the corresponding monitoring values; if the monitored values ​​do not meet the design requirements of the underground river channel, open a drainage channel at the bottom of the underground river channel.

2. The construction method for treating water gushing from a small underground river in a highway tunnel according to claim 1 is characterized by: In step 1, the width of the arc-shaped enclosing groove is 10-15 cm, and the depth of the arc-shaped enclosing groove is 5-8 cm.

3. The construction method for treating water gushing from a small underground river in a highway tunnel according to claim 1 is characterized by: In the step 2, the embedding depth of the water retaining plate is 90-150 cm.

4. The construction method for treating water gushing from a small underground river in a highway tunnel according to claim 1 is characterized by: In step 3, the drilling speed of the drilling equipment is 200-250 r / min, and the standing time is 30-50 min.

5. The construction method for treating water gushing from a small underground river in a highway tunnel according to claim 1 is characterized by: In step 4, the diameter of the installation slot is 3-6 cm.

6. The construction method for treating water gushing from a small underground river in a highway tunnel according to claim 1 is characterized by: In step 6, the depth of the drainage channel is 10-15 cm, and the width of the drainage channel is 5-7 cm.

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