A double-liquid synchronous grouting block and construction method thereof
By designing a dual-liquid synchronous grouting block, the rapid mixing of liquid A and liquid B is achieved by using the flow rate increase device and the anti-reflow device, the problem of unmet double-liquid grouting requirements in the prior art is solved and the equipment cost is reduced and grouting volume achieve efficient filling and anti-blocking effects.
Patent Information
- Application Number
- CN201910209783.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-03-19
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2039-03-19
AI Technical Summary
In the prior art, the single-liquid synchronous grouting + double-liquid secondary slurrying method cannot meet the domestic shield machine's demand for dual-liquid synchronous grouting, resulting in high equipment costs and large grouting volume, and it is difficult to meet the rapid filling and prevention. The problem of blockage.
A dual liquid synchronous grouting block is designed, including channel I and channel II. The flow rate enlargement device is provided at the outlet of channel I, and the anti-refocus device I is provided at the outlet of channel II, through the flow rate enlargement device and anti-refocus The permeability device realizes rapid mixing of liquid A and liquid B, and forms a pressure difference during the grouting process. It combines a check valve and rubber pad to prevent clogging and reverse osmosis, and supports high-pressure cleaning and dredging.
The double-liquid mixing area is filled outside the shield shell, preventing blockage, reducing equipment costs and construction costs. It is suitable for the transformation of the existing single-liquid synchronous grouting + double-liquid secondary slurry replenishing shield machine, and the new machine can also be used. This solution is small in size and low in grouting volume.
Smart Images
Figure CN109763843B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to tunnel construction, in particular to a double-liquid synchronous grouting block and a construction method thereof. Background Art
[0002] Shield machines are often used in subway tunnel excavation. One of the most important construction standards is the control of settlement and segment assembly quality. In existing technical construction methods, how to timely fill and consolidate the gap between the segments and the excavated soil is a key point in the development of shield machines.
[0003] The most effective measure to fill the gap behind the pipe segment is synchronous grouting, which can be further divided into dual-liquid synchronous grouting and single-liquid synchronous grouting. The key points of synchronous grouting design include preventing incomplete filling and pipe segment floating due to slurry loss. Compared with the latter, dual-liquid synchronous grouting has a short initial setting time, is not easy to clog, and can quickly fill the gap behind the pipe segment. However, its disadvantages are complex structure, large volume, and the need for a matching cleaning device, which will increase equipment cost and grouting volume.
[0004] In the selection of grouting scheme, considering the construction cost, usage habits and other factors, the domestic choice is single liquid synchronous grouting + double liquid secondary grouting (such as Figure 8 As shown in the figure, foreign countries mostly choose double-liquid synchronous grouting. With the development of shield machine applications, the demand for double-liquid synchronous grouting in China is becoming more and more vigorous, but the current domestic single-liquid synchronous grouting + double-liquid secondary grouting method can no longer meet the demand and needs further improvement. Summary of the invention
[0005] The present invention proposes a double-liquid synchronous grouting block and a construction method thereof, which can transform an existing single-liquid synchronous grouting + double-liquid secondary grouting shield machine into a double-liquid synchronous grouting shield machine, solving the problem that most existing domestic shield machines cannot meet the requirements of double-liquid synchronous grouting.
[0006] The technical solution of the present invention is implemented as follows: a dual-liquid synchronous grouting block includes a grouting block, in which a channel I and a channel II are arranged, a flow rate increasing device is arranged at the outlet of the channel I, and an anti-backseepage device I is arranged at the outlet of the channel II.
[0007] The flow rate increasing device comprises a gasket ring, the cross section of the inner hole of the gasket ring is smaller than the cross section of the channel I, and the gasket ring is fixed on the grouting block.
[0008] The gasket is provided with at least two inner holes.
[0009] The gasket ring is provided with an anti-backseepage device II.
[0010] The anti-backseepage device II includes a rubber pad, which includes a rubber head located at the inner hole. The cross-section of the inlet channel of the rubber head is larger than the cross-section of the outlet channel. The inlet channel gradually transitions to the outlet channel. The rubber pad is fixed on the grouting block.
[0011] The cross section of the rubber pad outlet channel is a cross or a straight line, and the cross or the straight line gradually bulges away from the plane of the grouting block.
[0012] The anti-backseepage device I comprises a one-way valve, which is fixed on the grouting block.
[0013] The cross section of the one-way valve is smaller than the cross section of the channel II.
[0014] The one-way valve is provided with a protective sleeve, which is fixed on the grouting block.
[0015] The channel I is the A liquid channel, which is connected to the A liquid tank. The channel II is the A liquid standby channel, which is connected to the A liquid tank and the B liquid tank respectively.
[0016] The grouting block is provided with channel III, channel I is the A liquid channel, the A liquid channel is connected to the A liquid tank, channel II is the B liquid channel, the B liquid channel is connected to the B liquid tank, and channel III is the A liquid standby channel, the A liquid standby channel is connected to the A liquid tank.
[0017] A construction method for a dual-liquid synchronous grouting block includes the following modes: a dual-liquid grouting mode, in which liquid A sucked from a liquid tank A enters a channel I, and liquid B sucked from a liquid tank B enters a channel II, and the flow rates of liquid A and liquid B are increased by a flow rate increasing device and an anti-backseepage device I respectively, and a pressure difference is formed with the channel to achieve rapid mixing of liquid A and liquid B; a single-liquid grouting mode, in which liquid A sucked from the liquid tank A enters the channel I for single-liquid grouting, and clean water is sucked from the liquid tank B into the channel II, and a low flow rate is used to prevent the anti-backseepage device I from being blocked or worn by mortar.
[0018] The advantages of the present invention are as follows: 1. The double-liquid (liquid A, liquid B) mixing zone is outside the shield shell. When the shield is advanced, the relative movement between the solidified filling material and the shield shell prevents the grouting pipe from being blocked; 2. An anti-blocking device is designed at the tail of the A liquid pipe to prevent large pieces of slag from entering the grouting pipe; a one-way valve is designed at the tail of the B liquid pipe to prevent back slurry from entering the grouting pipe; 3. Both the A liquid pipe and the B liquid pipeline can be cleaned with high-pressure water. At the same time, after removing the observation cover plate, the A liquid pipe can also be unblocked with a steel chisel; 4. Small size, low grouting volume, low equipment cost and low construction cost; 5. The existing single-liquid synchronous grouting + double-liquid secondary grouting shield machine can be transformed into a double-liquid synchronous grouting shield machine; 6. New machines can also adopt this grouting scheme. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a front view of the present invention.
[0021] Figure 2 It is a side view of the present invention.
[0022] Figure 3 This is an enlarged view of the present invention.
[0023] Figure 4 It is a side view of the gasket ring of the present invention.
[0024] Figure 5 It is a side view of the rubber pad of the present invention.
[0025] Figure 6 It is a side view of the connecting ring of the present invention.
[0026] Figure 7 It is the principle diagram of the double-liquid grouting system of the present invention.
[0027] Figure 8 This is the schematic diagram of the existing single-liquid grouting + double-liquid secondary grouting system.
[0028] In the figure: 1- grouting block, 2- gasket, 3- rubber pad, 4- connecting ring, 5- protective sleeve, 6- one-way valve, 7- channel I, 8- channel II. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] like Figure 1 and 2 As shown, a dual-liquid synchronous grouting block includes a grouting block 1, in which a channel I7 and a channel II8 are arranged, a flow rate increasing device and an anti-backseepage device II are arranged at the outlet of the channel I7, and an anti-backseepage device I is arranged at the outlet of the channel II8.
[0031] like Figures 3 to 6As shown, the flow rate increasing device includes a gasket 2, and the anti-seepage device II includes a rubber pad 3. The cross-section of the inner hole of the gasket 2 is smaller than the cross-section of the channel I7, which can increase the flow rate. The gasket 2 is provided with three inner holes, and the gasket 2 is provided with a rubber pad 3. The rubber pad 3 includes three rubber heads, and the rubber heads correspond to the inner holes one by one. The cross-section of the inlet channel of the rubber head is larger than the cross-section of the outlet channel. The inlet channel gradually transitions to the outlet channel. The cross-section of the outlet channel is a cross or a straight line, and the cross or straight line gradually bulges away from the plane of the grouting block. The rubber pad 3 further reduces the cross-section on the basis of the gasket 2, increases the outlet flow rate, and can prevent the seepage of large pieces of slag at the same time. The gasket 2 and the rubber pad 3 are fixed to the grouting block 1 by bolts and a connecting ring 4, and the rubber pad 3 is located between the gasket 2 and the connecting ring 4.
[0032] The anti-back-seepage device I includes a one-way valve 6, the cross-section of the one-way valve 6 is smaller than the cross-section of the channel II8, and a protective sleeve 5 is provided on the one-way valve 6. The small cross-section of the one-way valve 6 can prevent the slurry from back-seeping and further increase the flow rate of the B liquid. The protective sleeve 5 can protect the one-way valve 6 from being damaged by the impact of foreign objects. The protective sleeve 5 and the one-way valve 6 are fixed to the grouting block 1 by bolts.
[0033] If it is a modification of an old machine, since most old machines are single-liquid synchronous grouting machines, they only include A liquid channel and A liquid standby channel, then the channel I7 is the A liquid channel, which is connected to the A liquid tank, and the channel II8 is the A liquid standby channel, which is connected to the A liquid tank and the B liquid tank respectively.
[0034] If it is a new machine, the grouting block 1 is additionally provided with a channel III, the channel I7 is the A liquid channel, the A liquid channel is connected to the A liquid tank, the channel II8 is the B liquid channel, the B liquid channel is connected to the B liquid tank, and the channel III is the A liquid standby channel, the A liquid standby channel is connected to the A liquid tank. When the A liquid channel is unable to be dredged, the standby channel can be selected to continue to inject single liquid slurry or double liquid slurry, so as to avoid the shield machine stopping excavation due to the inability to grout.
[0035] like Figure 7As shown, a construction method of the above-mentioned dual-liquid synchronous grouting block includes the following modes: dual-liquid grouting mode, liquid A sucked from liquid tank A enters channel I7, and liquid B sucked from liquid tank B enters channel II8. Liquid A and liquid B increase their flow rates through the flow rate increasing device and anti-return seepage device I respectively, and form a pressure difference with the channel. Liquid A and liquid B are quickly mixed after being sprayed out of the channel to achieve dual-liquid grouting. The ratio of liquid A and liquid B is changed by flow regulation of their respective plunger pumps. After the grouting is completed, clean water can be sucked out separately to clean the entire pipeline. When the pipeline is blocked, high-pressure water and steel chisels can be used to clear it; single-liquid grouting mode, liquid A sucked from liquid tank A enters channel I7 for single-liquid grouting, and clean water is sucked from liquid tank B into channel II8 to prevent the anti-return seepage device I from being blocked or worn by mortar at a low flow rate (this method is to use such as Figure 8 This is achieved when an old machine equipped with "single-liquid synchronous grouting + double-liquid secondary grouting" equipment is modified as shown in the figure).
[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A dual-liquid synchronous grouting block, comprising a grouting block (1), wherein a channel I (7) and a channel II (8) are provided in the grouting block (1), characterized in that: The outlet of the channel I (7) is provided with a flow rate increasing device, and the outlet of the channel II (8) is provided with an anti-back-seepage device I; The flow rate increasing device comprises a gasket (2), the cross section of the inner hole of the gasket (2) is smaller than the cross section of the channel I (7), and the gasket (2) is fixed on the grouting block (1); The gasket (2) is provided with an anti-back-seepage device II; The anti-backseepage device II comprises a rubber pad (3), the rubber pad (3) comprises a rubber head located at the inner hole, the cross section of the inlet channel of the rubber head is larger than the cross section of the outlet channel, and the inlet channel gradually transitions to the outlet channel; the pad ring (2) is provided with at least two inner holes; the rubber heads correspond to the inner holes one by one, and the cross section of the outlet channel is a cross or a straight line.
2. The double-liquid synchronous grouting block according to claim 1, characterized in that: The rubber pad (3) is fixed on the grouting block (1).
3. The double-liquid synchronous grouting block according to claim 1, characterized in that: The anti-backseepage device I comprises a one-way valve (6), which is fixed on the grouting block (1).
4. The double-liquid synchronous grouting block according to claim 3 is characterized in that: The cross section of the one-way valve (6) is smaller than the cross section of the channel II (8).
5. The double-liquid synchronous grouting block according to claim 4 is characterized in that: The one-way valve (6) is provided with a protective sleeve (5), and the protective sleeve (5) is fixed on the grouting block (1).
6. The double-liquid synchronous grouting block according to claim 1, characterized in that: The channel I (7) is a liquid A channel, which is connected to the liquid A tank. The channel II (8) is a liquid A standby channel, which is connected to the liquid A tank and the liquid B tank respectively.
7. The double-liquid synchronous grouting block according to claim 1, characterized in that: The grouting block (1) is provided with a channel III, wherein the channel I (7) is a liquid A channel, which is connected to the liquid A tank, the channel II (8) is a liquid B channel, which is connected to the liquid B tank, and the channel III is a liquid A standby channel, which is connected to the liquid A tank.
8. A construction method of a double-liquid synchronous grouting block according to any one of claims 1 to 7, characterized in that: The invention comprises the following modes: a double-liquid grouting mode, in which liquid A is sucked from liquid tank A into channel I (7), and liquid B is sucked from liquid tank B into channel II (8). Liquid A and liquid B respectively increase their flow rates through a flow rate increasing device and an anti-return seepage device I, and form a pressure difference with the channel to achieve rapid mixing of liquid A and liquid B; a single-liquid grouting mode, in which liquid A is sucked from liquid tank A into channel I (7) for single-liquid grouting, and clean water is sucked from liquid tank B into channel II (8) to prevent the anti-return seepage device I from being blocked or worn by mortar at a low flow rate.