CN102798569B - A kind of tunnel hand hole joint bar draw-off gear and Hubbing method thereof - Google Patents

Abstract

A tunnel hand hole inserting and drawing device and a drawing method thereof, relating to the field of tunnel construction, in which at least one thread hole is respectively provided at the four corners of a base plate (1), and each thread hole is respectively connected to a supporting bolt (2 ) on the external thread in the middle, the two ends of each supporting bolt are respectively set as the supporting end (8) and the screwing end (3), and at least one rib hole (6) is provided in the middle of the base plate, and the ribs corresponding to the The upper part of the hole is provided with a rib-inserting locking ring (10), and both sides of the rib-inserting locking ring are respectively provided with limit blocks, and the lower part of the limit block is respectively provided with concave grooves extending outwards and corresponding to each other near the base plate. The upper part of the recessed groove and the limit block forms a T-shaped groove (12) towards the opposite side, wherein the rib-inserting locking ring is movably arranged in the T-shaped groove. The present invention has the characteristics of simple and fast operation, convenient maintenance and strong applicability, etc. The implementation of the invention greatly improves the construction efficiency and saves the cost.

Description

Tunnel hand hole inserting and drawing device and drawing method thereof

【Technical field】

The invention relates to the field of tunnel construction, in particular to a tunnel hand hole inserting and drawing device and a drawing method thereof.

【Background technique】

It is known that the tunnel through the Yellow River is designed with a full circular section. The inner diameter of the tunnel is 7.0m, and the outer diameter of the tunnel is 8.7m. The segment thickness is 40cm, and the ring width is 1.6m. Since the tunnel through the Yellow River has to bear the maximum water pressure of 0.67MPa, in order to meet the structural requirements of pressure-bearing water, after the completion of the assembly of the outer lining segment, another The lining structure is designed, the lining structure is post-tensioned prestressed concrete, the tunnel lining is made of C40.W12.F200 prestressed concrete, the thickness is 45cm, and the standard segment length is 9.6m; in order to verify the segment lining and concrete For the opening and closing degree and stress of the inner lining under 0.67Mpa water pressure, the hand hole of the tunnel segment is backfilled with high-grade concrete, and at the same time, pre-embedded bars are arranged in the hand hole of the segment to connect with the steel cage of the tunnel lining.

In order to ensure that the tunnel can meet the design requirements, construction personnel often conduct sampling and pulling tests on the pre-embedded hand hole insertion reinforcement during the construction process, and then verify whether the backfilled concrete in the hand can meet the anchoring effect of the insertion reinforcement. There are many bars, and the anchoring depth of the bars is small, so there are strict requirements for the pull-out test process of the bars. The existing test methods are:

Method 1: By making a steel plate, use manual support to fix the jack of the anchor rod puller, and then adjust the direction of the jack and the anchor rod or other pre-embedded rods, and then pull out after the direction is adjusted to be consistent. This method of drawing is more difficult to construct. During construction, multiple personnel are required to support the steel plate. After the anchor rod is loaded into the jack, add pads at the four corners of the steel plate to adjust the verticality of the steel plate to the jack. Then start drawing. During the construction process, the operation is difficult, the force direction of the bolt is not easy to control, and the construction speed is slow;

Method 2: By chiseling or grinding the installation surface of the anchor rod, the direction of the anchor rod is perpendicular to the direction of the installation surface, and then the jack is installed for pulling. This method is beneficial to the anchor rod or pre-embedded rod on the initial support surface. However, chiseling or grinding the construction surface requires strict control, and its applicability is poor. For the drawing construction with a large number of buildings or the surface of the building must not be damaged, this method is difficult to operate and has a destructive effect on the appearance of the building and the anchorage depth.

The above-mentioned test method has disadvantages such as low work efficiency and complicated operation. Since it is required to select 3 sets of inserted bars at the top arch for each standard section during the test, the design pull-out force of a single inserted bar is 86.6KN. During the pull-out test, it must be strictly ensured that the inserted reinforcement and the bolt puller are on the same straight line. This test has a large amount of pulling, and the bolt puller is not easy to fix during the test. The most important test method above affects the normal construction of the lining. For this reason, it has become a technical problem urgently to be solved by those skilled in the art to improve the inserting and drawing device and the drawing method.

【Content of invention】

In order to overcome the deficiencies in the background technology, the present invention provides a tunnel hand hole inserting tendon drawing device and its drawing method. The present invention sets supporting bolts at the four corners of the base plate and sets inserting ribs on the upper part of the inserting rib hole. The locking ring greatly improves the speed and safety of the pull-out test for inserting ribs in the hand hole. The invention has the characteristics of simple and fast operation, convenient maintenance and strong applicability. The implementation of the invention greatly improves the construction efficiency and saves costs.

In order to realize the above-mentioned purpose of the invention, the present invention adopts following technical scheme:

A tunnel hand hole inserting and pulling device, comprising a base plate, support bolts and inserting rib locking rings, at least one thread hole is respectively provided at the four corners of the base plate, and the inside of each thread hole is respectively connected to the outer part of the middle part of the support bolt. On the thread, the two ends of each supporting bolt are respectively set as a supporting end and a screwing end, at least one rib-inserting hole is provided in the middle of the base plate, and a rib-inserting locking ring is provided on the upper part corresponding to the rib-inserting hole, The two sides of the rib-inserting locking ring are respectively provided with limit blocks, and the lower part of the limit block is respectively provided with concave grooves extending outwards and corresponding to each other near the base plate, and the two concave grooves and the upper part of the limit block face to the opposite side. A T-shaped slot is formed, wherein the rib-inserting locking ring is movably arranged in the T-shaped slot to form a hand hole inserting rib-drawing device.

In the tunnel hand-hole tendon insertion and drawing device, the thread holes are formed by directly drilling and tapping at the four corners of the substrate or by setting light holes at the four corners of the substrate, and the upper part of the light holes is welded or threaded. Connect the nut to form a thread hole.

In the tunnel hand hole inserting and drawing device, the shape of the base plate is triangular, quadrangular, elliptical, circular, hexagonal or polygonal.

In the tunnel hand hole inserting and drawing device, the replacement structure of the T-shaped slot is that angle steels are respectively provided on both sides of the locking ring for inserting bars, and the T-shaped slots are formed by the two angles or directly on the base plate. Set the T-slot directly.

In the said device for inserting and pulling out reinforcement in the hand hole of a tunnel, reinforcement ribs are respectively provided on the outer base plates of the two angle steels.

In the tunnel hand hole inserting and pulling device, the inserting and locking ring is an L-shaped structure, and a circular or oval or polygonal hole is arranged on the bottom of the inserting and locking ring, and the inserting and locking ring is A thread hole is provided on the side of the ring, and a locking bolt is arranged in the thread hole.

In the tunnel hand hole insertion and pulling device, the shape of the screw end is two planes arranged parallel to each other or quadrilateral, hexagonal or polygonal.

In the tunnel hand hole tendon insertion and drawing device, at least one process tank is respectively provided at both ends of the base plate, and the shape of each process tank is semicircle, circle, ellipse, polygon or square.

In the tunnel hand hole insertion and pulling device, the shape of the insertion hole is circular, elliptical, polygonal or oblong.

A drawing method for a tunnel hand hole insertion and drawing device. The first step is to fix the base plate. Firstly, the support bolts set on the four corners of the base plate are pre-adjusted according to the shape of the test position, that is, the screw set at one end of the support bolt is screwed. Make the support end set at the other end of the support bolt close to the rib installation surface, then pass the pre-embedded ribs at the selected experimental position through the rib locking ring and the rib hole in the T-shaped groove on the base plate in sequence, and pass through The locking bolt on the inserting bar locking ring fixes the pre-embedded inserting bar and the substrate, and then fixes the inserting bar drawing instrument to the end of the pre-embedded inserting bar; the second step is to adjust the base plate, first observe the inserting bar Check whether the jack in the pullout instrument is vertical and fit closely to the plane of the base plate. If not, adjust the support bolts on the four corners of the base plate until it is vertical and fit tightly. The drawing instrument is pressurized, and when the jack in the inserting and drawing instrument is stressed, the locking bolt on the inserting and inserting locking ring is loosened; the third step is to perform a pulling test, that is, to open the inserting and drawing instrument, and to The jack in the tendon-inserting and pulling-out apparatus is pressurized to carry out the pulling-out experiment of inserting tendons in the handhole.

Due to the adoption of the above-mentioned technical scheme, the present invention has the following beneficial effects:

The present invention relates to a tunnel hand hole inserting and drawing device and its drawing method. The present invention ensures that the base plate can adapt to pre-embedded inserting bars under different inclination angles by arranging support bolts at the four corners of the base plate, and at the same time ensures that the anchor bolts can be pulled The jack in the pullout instrument is on the same straight line as the pre-embedded ribs. The present invention fixes the pre-embedded ribs with the base plate by setting the ribs locking ring on the upper part of the ribs hole, which greatly improves the pulling of the ribs inserted into the hand hole. The speed and safety of the test, the present invention has the characteristics of simple and fast operation, convenient maintenance, and strong applicability. Through the implementation of the present invention, only one person can complete the test without affecting the appearance of the building and the anchorage depth, greatly improving the performance of the test. The construction efficiency is improved and the construction cost is reduced.

【Description of drawings】

Fig. 1 is the three-dimensional structure schematic diagram of the present invention when in use;

Fig. 2 is a schematic diagram of the assembly relation structure of the present invention;

In the figure: 1. Base plate; 2. Support bolt; 3. Screw end; 4. Embedded rib; 5. Process groove; 6. Hole for rib; , Nut; 10, inserting rib locking ring; 11, locking bolt; 12, T-slot; 13, reinforcing rib; 14, angle steel.

【Detailed ways】

The present invention can be explained in more detail by the following examples, and the present invention is not limited to the following examples;

A device for inserting tendons in a tunnel hand hole described in conjunction with accompanying drawings 1 to 2 includes a base plate 1, a support bolt 2 and a rib inserting locking ring 10, and the shape of the base plate 1 is triangular or quadrangular or elliptical or circular or hexagonal or polygonal, provide a fixed operating platform for the inserting and drawing instrument 7 through the base plate 1, and its effect is to provide a supporting operating platform for the jack in the inserting and drawing instrument. The two ends of the base plate 1 are respectively provided with At least one process tank 5, the shape of each process tank 5 is semicircular or circular or elliptical or polygonal or square, and at least one wire hole is respectively provided at the four corners of the substrate 1, and the wire hole is in the The four corners of the substrate 1 are directly drilled and tapped to form a thread hole or a light hole is set at the four corners of the substrate 1, and a thread hole is formed on the top of the light hole by welding or a threaded nut 9, and each thread hole is respectively connected to a On the external thread in the middle of the support bolt 2, the two ends of each support bolt 2 are respectively set as a support end 8 and a screw end 3, and the shape of the screw end 3 is two parallel planes or quadrilaterals or hexagons. Shaped or polygonal, at least one rib-inserting hole 6 is provided in the middle of the base plate 1, and the shape of the rib-inserting hole 6 is circular or elliptical or polygonal or oblong, corresponding to the rib-inserting hole 6 The upper part is provided with inserting rib locking ring 10, inserting rib locking ring 10 is L-shaped structure, is provided with circular or oval or polygonal hole at the bottom edge of inserting rib locking ring 10, inserts rib locking ring 10 The side of 10 is provided with a thread hole, the thread hole is provided with a locking bolt 11, the two sides of the rib-inserting locking ring 10 are respectively provided with limit blocks, and the lower part of the limit block is respectively provided at a place close to the base plate 1. There are concave grooves extending outward and corresponding to each other, and a T-shaped groove 12 is formed from the upper part of the two concave grooves and the limit block to the opposite side. An angle steel 14 is provided, and a T-shaped groove 12 is formed by the two angle steels 14 or a T-shaped groove 12 is directly arranged on the base plate 1, wherein the function of the T-shaped groove 12 is to provide positioning for the rib-inserting locking ring 10, and the On the base plate 1 of two angle steels 14 outer sides, be provided with reinforcing rib 13 respectively, wherein said inserting rib locking ring 10 is set movably in T-shaped groove 12 and forms hand hole inserting rib drawing device.

Implement the drawing method of a kind of tunnel hand hole insertion and drawing device of the present invention, the first step is to fix the base plate 1, first adjust the support bolts 2 provided on the four corners of the base plate 1 in advance according to the shape of the experimental position, that is, by screwing The screwing end 3 provided at one end of the support bolt 2 makes the support end 8 provided at the other end of the support bolt 2 close to the installation surface of the insertion rib, and then the pre-embedded insertion rib 4 of the selected experimental position passes through the T-shaped slot 12 on the base plate 1 in sequence The inner rib locking ring 10 and the rib hole 6, and the pre-embedded rib 4 and the base plate 1 are fixed by the locking bolt 11 on the rib locking ring 10, and then the rib inserting and pulling instrument 7 is fixed to the Pre-embed the end of the rib 4; the second step is to adjust the substrate 1. First, observe whether the jack in the rib insertion and pulling instrument 7 is vertical and fit closely with the plane of the substrate 1. If it is not vertical or the fit is not tight, It can be adjusted through the support bolts 2 provided on the four corners of the base plate 1 until it is vertical and fit tightly. At this time, the bar insertion and drawing instrument 7 can be pressurized, and the jack in the bar insertion and drawing instrument 7 will loosen after being stressed. Open the locking bolt 11 on the rib locking ring 10; the third step is to carry out the pull-out test, that is, open the rib-inserting drawing instrument 7, and pressurize the jack in the rib-inserting drawing instrument 7 to pull the ribs in the hand hole pull experiment.

The matters needing attention in the construction process of the present invention are:

(1) When installing the base plate 1, attention should be paid to the correct installation of the locking bolt 11 on the locking ring 10 of the T-shaped groove 12, and the screw rod of the locking bolt 11 should be completely unscrewed;

(2) When the jack in the bar insertion and pulling instrument 7 is fixed to the base plate 1, check whether the locking bolts 11 are tightened to prevent the base plate 1 from falling;

(3) Strengthen the safety awareness of construction workers, conduct pre-job safety training, and must wear safety helmets and other protective equipment before entering the site.

A tunnel hand hole inserting and drawing device and its drawing method described in the present invention are not only suitable for segment hand hole inserting and drawing tests, but also for pulling out tests of tunnel anchors and pre-embedded rods in buildings. pull-out experiment.

The unspecified parts of the present invention are prior art.

The embodiments selected herein for the purpose of disclosing the present invention are presently considered suitable, however, it should be understood that the present invention is intended to include all changes and modifications of the embodiments that fall within the concept and scope of the invention.

Claims (9)

1. a tunnel hand hole joint bar draw-off gear, comprise substrate (1), carrying bolt (2) and joint bar retaining ring (10), it is characterized in that: be respectively equipped with at least one hole A in the corner of substrate (1), each described silk hole A is connected on the external thread at carrying bolt (2) middle part, the two ends of each carrying bolt (2) are set to support end (8) respectively and screw end (3), the middle part of described substrate (1) is provided with at least one joint bar hole (6), joint bar retaining ring (10) is provided with on the top of the described joint bar hole (6) of correspondence, described joint bar retaining ring (10) is L-type structure, circle or oval or polygonal holes is provided with on the base of joint bar retaining ring (10), a hole B is provided with at the side of joint bar retaining ring (10), clamping screw (11) is provided with in described silk hole B, limited block is respectively equipped with in the both sides of joint bar retaining ring (10), described limited block bottom is respectively equipped with near substrate (1) place and stretches out and mutually corresponding recessed groove, T-slot (12) is formed by the top opposite face of two recessed grooves and limited block, the activity in T-slot (12) of wherein said joint bar retaining ring (10) arranges the tunnel hand hole joint bar draw-off gear described in formation.

2. tunnel hand hole joint bar draw-off gear according to claim 1, it is characterized in that: described silk hole A is that direct drilling and tapping forms silk hole or by arranging unthreaded hole in the corner of substrate (1), forms silk hole on the top of described unthreaded hole by welding or silk connected nut (9) in the corner of substrate (1).

3. the tunnel hand hole joint bar draw-off gear according to the arbitrary claim of claim 1 or 2, is characterized in that: the profile of described substrate (1) is quadrilateral.

4. tunnel hand hole joint bar draw-off gear according to claim 1, it is characterized in that: described T-slot (12) also can be made up of following replacing structure: be respectively equipped with angle steel (14) in the both sides of joint bar retaining ring (10), and form T-slot (12) by angle steel described in two (14) or directly T-slot (12) be set on substrate (1).

5. tunnel hand hole joint bar draw-off gear according to claim 4, is characterized in that: the substrate (1) in angle steel described in two (14) outside is respectively equipped with reinforcement (13).

6. tunnel hand hole joint bar draw-off gear according to claim 1, is characterized in that: described in screw end (3) shape be quadrilateral.

7. tunnel hand hole joint bar draw-off gear according to claim 1, is characterized in that: the two ends of described substrate (1) are respectively equipped with at least one technology groove (5), and the shape of each described technology groove (5) is semicircle.

8. tunnel hand hole joint bar draw-off gear according to claim 1, is characterized in that: the shape of described joint bar hole (6) is circular or oval or polygon.

9. a kind of tunnel hand hole joint bar Hubbing method implemented by the tunnel hand hole joint bar draw-off gear according to the arbitrary claim of claim 1 ~ 8, it is characterized in that: substrate (1) is fixed by the first step, first experimentally the shape of position regulates the carrying bolt (2) that substrate (1) corner is arranged in advance, namely by screw carrying bolt (2) one end arrange screw end (3), the support end (8) that carrying bolt (2) other end is arranged is close to joint bar installed surface, then the pre-doweling (4) of selected experiment position is passed successively the joint bar retaining ring (10) in the upper T-slot (12) of substrate (1) and joint bar hole (6), and by the clamping screw (11) in joint bar retaining ring (10), pre-doweling (4) and substrate (1) are fixed, subsequently joint bar drawing instrument (7) is fixed to the end of pre-doweling (4), second step regulates substrate (1), first observe the lifting jack in joint bar drawing instrument (7) and the plane of substrate (1) whether vertical with fit tight, as out of plumb or laminating not tight, carrying bolt (2) by substrate (1) corner is arranged regulates, until vertical tight with laminating, now can pressurize to joint bar drawing instrument (7), when namely unclamping the clamping screw (11) in joint bar retaining ring (10) after the lifting jack in joint bar drawing instrument (7) is stressed, 3rd step carries out pull-out test, namely opens joint bar drawing instrument (7), carries out testing the drawing of hand hole joint bar to the lifting jack pressurization in joint bar drawing instrument (7).