Non-blasting excavation method for adjacent camping tunnel

Abstract

The invention discloses a non-blasting excavation method for an adjacent camping tunnel. The adjacent camping tunnel non-blasting excavation method comprises the steps that a plurality of vertical joints are sawn on a tunnel face, the joint cutting widths of the multiple vertical joints are the same, and the transverse distances between every two adjacent vertical joints are the same; carrying out local drilling and splitting on the sawn tunnel face; and a breaking hammer method is used for breaking the tunnel face after local drilling and splitting. According to the method, the technical problems of long time consumption and low efficiency caused by comprehensive drilling and splitting of the tunnel face are solved.

Description

Technical Field

[0001] The present application relates to the field of engineering construction, and in particular to a non-explosive excavation method for a neighboring tunnel. Background Art

[0002] In the site selection of high-speed railway lines, in order to save land or avoid the division of the region and ease the traffic congestion of the main transportation railway lines, the existing lines are usually parallel, which leads to the gradual increase of tunnel projects under construction in adjacent camps. However, since the distance between adjacent tunnels is generally small, it is easy to cause engineering safety and quality accidents during the construction process, endangering the safety of existing line operations. Non-explosive excavation is the use of mechanized equipment and chemical agents to replace traditional blasting processes. This process reduces the risk of explosion, reduces the probability of engineering accidents, and is safer for construction personnel and equipment.

[0003] In the prior art, non-explosive excavation is often carried out using cantilever boring machine method, water-grinding drilling method, static crushing agent method or breaker hammer method. For example, the patent with application number CN201410537149.3 discloses a non-explosive excavation block method and construction method for hard rock tunnels. Specifically, it discloses the use of coring technology to drill mutually interlocking and cut peripheral holes along the tunnel excavation contour line, so as to form a hole wall-like excavation free surface around the tunnel face; it uses hydraulic splitter splitting technology and takes advantage of the fact that the tensile strength and shear strength of rock are much smaller than the compressive strength, first excavating and dividing the tunnel face, and then in each In each excavation block, there are no more than two splitting faces of synchronous splitting excavation, and the two splitting faces intersect at a large obtuse angle and include at least one excavation free face perpendicular to the tunnel face. Then, the excavation construction sequence of first the bottom and then the top, first the periphery and then the middle is adopted, and a smaller splitting force is used to perform splitting excavation along the splitting faces to tensilely split and shear-split the rock on the tunnel face. The present invention can eliminate the adverse effects of vibration, noise and dust in hard rock excavation construction, and can improve the utilization rate of tunnel slag as building stone. For another example, the patent with application number CN201811563821.0 discloses a non-explosive excavation construction method for a hard rock tunnel, which specifically discloses the following steps: A. Dividing the tunnel face into an upper face and a lower face, and drilling a number of boreholes 1 along the longitudinal direction of the tunnel on the dividing line between the upper face and the lower face, so that all boreholes 1 form an open face; B. Drilling a number of boreholes 2 along the longitudinal direction of the tunnel on the upper face, and starting from the boreholes 2 close to the open face, gradually splitting and peeling off the rock on the upper face, excavating the upper face, and forming an upper step; C. Drilling a number of boreholes 3 vertically along the tunnel on the bottom surface of the upper step, and starting from the boreholes 3 close to the lower face, gradually splitting and peeling off the rock on the lower face, to complete the excavation and advancement of the entire face. This construction method utilizes the brittleness of rock to drill and split the rock, which greatly improves construction efficiency. This method peels layer by layer from point to surface, is flexible, simple and convenient to operate, has good effects, requires little construction investment, and saves costs.

[0004] It can be seen that the above two patents mainly use drilling and splitting technology for non-blasting tunnel excavation, which requires comprehensive drilling and splitting of the heading face, resulting in low construction efficiency.

[0005] Currently, no effective solution has been proposed to address the time-consuming and inefficient problems of comprehensive drilling and splitting of the tunnel face in related technologies. Summary of the invention

[0006] The main purpose of the present application is to provide a non-blasting excavation method for a neighboring tunnel, so as to solve the problem of long time consumption and low efficiency caused by the need to drill and split the entire face.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a non-explosive excavation method for a neighboring tunnel is provided.

[0008] The non-explosive excavation method of the Linying Tunnel according to the present application includes: sawing a plurality of vertical slits on the tunnel face, wherein the slit widths of the plurality of vertical slits are the same and the lateral spacings between any two adjacent vertical slits are the same; locally drilling and splitting the tunnel face after sawing; and crushing the tunnel face after local drilling and splitting using a breaker hammer method.

[0009] Furthermore, a plurality of vertical seams are sawed on the face, including: a plurality of vertical seams are sawed on the face using a crawler stone cutter, wherein the maximum cutting depth of the stone cutter is 75 cm, the lifting height is 3.5 to 7.5 m, and the cutting speed is 4 m / h.

[0010] Furthermore, the cutting width of the vertical slit is 2 cm.

[0011] Furthermore, the number of the vertical seams is 15.

[0012] Furthermore, the horizontal spacing of the vertical seams is 1m.

[0013] Furthermore, the total length of vertical joints per cycle is 80.32 m.

[0014] Furthermore, during cutting, the step height on the face is controlled at 7m.

[0015] Furthermore, the number of holes drilled for local drilling and splitting is 19.

[0016] Furthermore, a breaker hammer method is used to break the tunnel face after local drilling and splitting, including: using a SY365H breaker hammer to break the tunnel face after local drilling and splitting.

[0017] Furthermore, a breaker hammer method is used to break the face after local drilling and splitting, and also includes: using a PSK-130H drilling and splitting machine to trim the difficult positions from the arch waist to the arch foot on both sides.

[0018] In the embodiment of the present application, a non-explosive excavation method of a neighboring tunnel is adopted, in which a plurality of vertical slits are sawed on the face, wherein the slit widths of the plurality of vertical slits are the same, and the lateral spacings between any two adjacent vertical slits are the same; local drilling and splitting are performed on the sawed face; a breaker hammer method is used to break the local drilling and splitting face; the purpose of only local drilling and splitting of the face is achieved, thereby realizing the technical effect of shortening the construction time and improving the construction efficiency, and further solving the technical problems of long time and low efficiency caused by comprehensive drilling and splitting of the face. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0020] Figure 1 It is a schematic diagram of a process of a non-explosive excavation method for a neighboring tunnel according to an embodiment of the present application;

[0021] Figure 2 This is one of the state schematic diagrams of the tunnel face according to a preferred embodiment of the present application;

[0022] Figure 3 This is the second schematic diagram of the state of the tunnel face according to another preferred embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] like Figure 1 As shown, the present application relates to a non-explosive excavation method for a neighboring tunnel, and the non-explosive excavation method for a neighboring tunnel comprises the following steps:

[0030] Step S101, sawing a plurality of vertical seams on the tunnel face, wherein the cutting widths of the plurality of vertical seams are the same, and the lateral spacings between two adjacent vertical seams are the same;

[0031] Specifically, before drilling and splitting, the tunnel face is first sawn according to the same vertical seam cutting width and transverse spacing to obtain a plurality of vertical seams.

[0032] In this embodiment, preferably, a plurality of vertical seams are sawed on the face, including: a plurality of vertical seams are sawed on the face using a crawler stone cutter, wherein the maximum cutting depth of the stone cutter is 75 cm, the lifting height is 3.5 to 7.5 m, and the cutting speed is 4 m / h.

[0033] It should be understood that the cutting width of the vertical seam is 2cm; the number of vertical seams is 15; the horizontal spacing of the vertical seams is 1m; the total length of the vertical seams in each cycle is 80.32m; when cutting, the step height on the palm face is controlled at 7m.

[0034] Step S102, performing local drilling and splitting on the sawn face;

[0035] After sawing, the tunnel face only needs local drilling and splitting to achieve the purpose of effective excavation; specifically, the number of holes for local drilling and splitting is 19, while the number of holes for comprehensive drilling and splitting is 55; it can be seen that the tunnel face after sawing can greatly reduce the number of holes, shorten the construction time and improve the construction efficiency.

[0036] Step S103: Use a breaker hammer method to break the tunnel face after local drilling and splitting.

[0037] A breaker hammer method is used to break the tunnel face after local drilling and splitting, including: using a SY365H breaker hammer to break the tunnel face after local drilling and splitting.

[0038] It should be understood that the PSK-130H drilling and splitting machine is used for trimming at the locations from the arch waist to the arch foot on both sides where crushing is difficult.

[0039] Compared with the traditional drilling and splitting technology, the crushing process of the present invention reduces the time by 5 hours, the trimming process reduces the time by 2 hours, and the total efficiency is reduced by 5.4 hours compared with before, that is, the cycle footage is 60 cm, the total time is 27.5-5.4=22.1 hours, equivalent to a work efficiency of 0.65m / day.

[0040] It is worth noting that in order to effectively compare the advantages and disadvantages of the conventional technology combining drilling splitting and breaker hammer breaking with the technology of the present invention, refer to Figure 3 On the left side of the face, drilling splitting and breaker hammer crushing were used, while on the right side, sawing and local breaker hammer crushing were used to compare the effectiveness of the two excavation techniques.

[0041] After comparison, the left side of the face was drilled with a PSK-130H drilling and splitting machine, the drilling position was arranged in a plum blossom shape, the drilling diameter was 0.14m, the drilling depth was 1.2m, the hole spacing was 0.7m, the number of holes was 55, and the self-contained splitting rod was used for splitting while drilling. The total time for drilling and splitting was 5h, and the average time for each hole was 5.5min. Then the SY365H breaker was used for crushing. The total time was 19h, the cycle footage was 20cm, and the work efficiency was 0.25m / day. The right side of the face was combined with sawing, local drilling and splitting and breaker hammer method, with a total time of 19h, a single cycle footage of 45cmm, and a work efficiency of 0.57m / day. It can be seen that the construction method of the present invention can effectively improve the construction efficiency of non-explosive excavation of hard granite tunnels, while the equipment investment is small, the disturbance to the existing line is small, and it has the outstanding effects of high construction speed, strong economy, high mechanization configuration, and small disturbance to the operating line.

[0042] From the above description, it can be seen that the present application achieves the following technical effects:

[0043] In the embodiment of the present application, a non-explosive excavation method of a neighboring tunnel is adopted, in which a plurality of vertical slits are sawed on the face, wherein the slit widths of the plurality of vertical slits are the same, and the lateral spacings between any two adjacent vertical slits are the same; local drilling and splitting are performed on the sawed face; a breaker hammer method is used to break the local drilling and splitting face; the purpose of only local drilling and splitting of the face is achieved, thereby realizing the technical effect of shortening the construction time and improving the construction efficiency, and further solving the technical problems of long time and low efficiency caused by comprehensive drilling and splitting of the face.

[0044] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A non-explosive excavation method for a neighboring tunnel, characterized in that: include: Sawing a plurality of vertical seams on the tunnel face, wherein the plurality of vertical seams have the same cutting width and the lateral spacing between two adjacent vertical seams is the same; Perform local drilling and splitting on the sawn face; Use the breaker hammer method to break the tunnel face after local drilling and splitting.

2. The non-explosive excavation method for neighboring tunnels according to claim 1 is characterized in that: Several vertical seams are cut on the face, including: A crawler stone cutter is used to saw several vertical seams on the face of the tunnel. The maximum cutting depth of the stone cutter is 75 cm, the lifting height is 3.5 to 7.5 m, and the cutting speed is 4 m / h.

3. The non-explosive excavation method for neighboring tunnels according to claim 1 or 2, characterized in that: The cutting width of the vertical slit is 2 cm.

4. The non-explosive excavation method for neighboring tunnels according to claim 1 or 2, characterized in that: The number of the vertical seams is 15.

5. The non-explosive excavation method for neighboring tunnels according to claim 1 or 2, characterized in that: The horizontal spacing of the vertical seams is 1m.

6. The non-explosive excavation method for neighboring tunnels according to claim 1 or 2, characterized in that: The total length of vertical joints in each cycle is 80.32m.

7. The non-explosive excavation method for neighboring tunnels according to claim 1 or 2, characterized in that: During cutting, the step height on the palm face is controlled at 7m.

8. The non-explosive excavation method for neighboring tunnels according to claim 1 is characterized in that: The number of holes drilled locally for splitting is 19.

9. The non-explosive excavation method for neighboring tunnels according to claim 1, characterized in that: Use the breaker hammer method to break the tunnel face after local drilling and splitting, including: SY365H breaker is used to break the tunnel face after local drilling and splitting.

10. The non-explosive excavation method for neighboring tunnels according to claim 6, characterized in that: The use of a breaker hammer method to break the tunnel face after local drilling and splitting also includes: The PSK-130H drilling and splitting machine is used to trim the difficult-to-crush areas from the arch waist to the arch foot on both sides.

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