CN109653213B - A kind of construction method of ground connection wall forming groove - Google Patents

Abstract

The invention relates to the field of ground-connecting wall construction, and more particularly, to a method for forming a groove for a ground-connected wall with "three grasps of nine holes and two grasps of five holes". For the first-stage groove, a groove forming machine is used to grasp the groove, and each groove The secondary first-stage groove adopts the "three-grabbing method" to grasp the groove, and then two pile punching machines are used to punch holes at the same time. Each pair of closed grooves adopts the "two grasping method" to grasp the grooves, and then use two pile punching machines to punch holes at the same time, and each pair of closed grooves adopts the "five-hole method" to punch the holes. Afterwards, use a round hammer and a square hammer to trim the grooves in turn. This method not only gives full play to the high efficiency of the grooving machine in the soft soil stratum, and better exerts the advantages of the ground connection wall, but also satisfies the characteristics that the pile puncher can exert its advantages in the high-strength rock stratum, and effectively It avoids the risk of slow construction progress and difficult quality control of the ground connecting wall in the special stratum with soft upper and lower hard layers.

Description

A kind of construction method of ground connection wall forming groove

technical field

The invention relates to the technical field of ground connecting wall construction, and more particularly, to a construction method of "three holes with nine holes and two holes with two holes" to form grooves for ground connecting walls.

Background technique

In recent years, the construction of connecting walls in China has developed rapidly, with the emergence of various trough forming machines, making the ground connecting walls more and more widely used in underground engineering. The retaining and anti-seepage structure of structures is very safe and economical. Ground connecting wall construction has the characteristics of high work efficiency, short construction period, reliable safety and quality, and high economic benefit. It is very used in urban construction. Due to the continuous improvement of construction methods, the underground continuous wall is almost impermeable. However, there are also shortcomings. If the construction method is inappropriate or the construction geological conditions are complex and special, it will lead to slow progress of forming the groove of the ground connecting wall and difficult to guarantee the quality. Safety and practicality of the structure.

Under the special geological environment where the upper part is soft and the lower part is hard, it is difficult for the grooving machine to carry out grooving operation in the rock formation. This geological environment has caused great obstacles to the construction of the ground connecting wall. Improving the construction progress and quality of the trough formation of the ground connecting wall is a key concern in the construction.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies existing in the prior art, the present invention provides a construction method for connecting walls to form grooves with "three holes with nine holes and two holes with two holes", so as to solve the problems of the progress and quality of grooves formed by connecting walls in the prior art .

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is:

A construction method for forming a groove by connecting a wall with three holes and two holes with five holes, comprising the following steps:

(1) For the construction of the guide wall, the construction site has a longitudinal slope along the ground elevation along the ground connecting wall. During the construction of the guide wall, the guide wall elevation shall be divided according to each pair of ground connecting walls or several adjacent ground connecting walls, and the guide wall shall be placed outside. 15cm, the headroom is increased by 6cm.

(2) During the construction of the guide wall, the production of the mud pool and the preparation of new mud shall be carried out simultaneously, and the position of the mud pool shall be reasonably selected at the construction site;

The mud pool includes new mud pool, circulating pool and waste mud pool. The new slurry tank is used to prepare new slurry, and it is used for standby when the slurry in the groove section is unqualified when the tank is formed; Requirements; the waste slurry pool is used to meet the requirements of the concrete floor-to-wall concrete pouring process, storing the mud and re-using the mud through the mud processor again.

(3) After the concrete strength of the guide wall reaches 75% and the preparation of the new slurry is completed, a hydraulic grooving machine is used for the construction of the first-stage groove forming groove for the ground connecting wall;

(4) According to step (3), gradually construct 4 to 6 pairs of adjacent connecting walls;

(5) After 4 to 6 pairs of adjacent first-phase trough-ground connecting walls are constructed and the concrete strength meets 75%, the closed trough-to-trough construction shall be carried out;

(6) According to step (5), gradually construct the closed ground connecting wall;

(7) Construct the first-phase trough section and the closed trough section in the order of step (3), step (4) and step (5) to form a flow operation.

Further, in the step (3), the first-stage slot formation specifically includes the following steps:

(3a) Formation of soil layer grooves: The first-phase groove section of each pair is divided into 6 meters, and marks are set out on the guide wall. When the first-phase groove concrete is poured, both ends are closed with locking pipes, and each side of the groove section is expanded outward. 870mm, using the "three-grab method" for the construction of the grab grooves, the first grab is constructed first, and a hydraulic grab groove forming machine is used to form the grooves. When dropping the bucket, the bucket teeth on both sides should be inserted into the soil at the same time to arrange the grab grooves, and the groove forming machine When positioning, the mechanical crawler should be parallel to the groove section. Every time the grab bucket is grabbed, the verticality and position of the grab bucket should be observed according to the vertical line, so that the center of the grab bucket is consistent with the center of the groove section, and then the bucket is lowered to the soil surface. If it is hard, lift the grab bucket about 0.8m, and then grab the soil after impacting several times. The bucket should be lifted slowly. When the grab bucket comes out of the mud surface, the mud should be refilled in time to ensure that the mud level is not lower than 0.50m above the foot of the guide wall and high When the groundwater level is above 0.50m; the grooving operation is stopped when the rock formation is reached, and the second and third grooving constructions are started according to the markings in sequence, and the method is the same as that of the first grouting;

(3b) Rock stratum punching: After the soil trough is completed, two pile punching machines are used for each trough section. The first stage trough section adopts the "nine-hole method" punching construction. Holes K3 and K4, holes K5 and K6, holes K7, K8, and K9 are constructed in sequence. During the punching process, a short stroke method is adopted; if the rock surface is slope rock during punching, it needs to be backfilled with schist and then punched. hole;

(3c) Round hammer repairing: After the rock formation is punched, a pile puncher is used to repair the hole with a round hammer, starting from the side of the groove section, and completing the rock between the holes in sequence;

(3d) After the hole repair with the round hammer is completed, use a pile puncher to repair the remaining rock with a square hammer, starting from one side of the groove section, and repair all the rocks in the groove wall in sequence to avoid the obstruction of the steel cage.

Further, in the step (5), closing the groove to form a groove includes the following steps:

(5a) Formation of soil layer grooves: Each closed groove section is divided into 6 meters, and marks are set out on the guide wall. When the first-stage groove section is formed into a groove, each side is expanded by 870mm, and the closed groove section is actually formed into a groove of 4300mm. The "two grab method" is adopted for the construction of the grab groove. The first grab is constructed first, and a hydraulic grab groove forming machine is used to form the groove. When the bucket is dropped, the bucket teeth on both sides should be inserted into the soil at the same time to arrange the grab groove. When the groove forming machine is positioned , The mechanical crawler belt should be parallel to the groove section. Each time the grab bucket is grabbed, the verticality and position of the grab bucket should be observed according to the vertical line, so that the center of the grab bucket is consistent with the center of the groove section, and then the bucket is lowered to the soil surface. If the soil is hard Then lift the grab bucket for about 0.8m, impact several times and then grab the soil. The bucket should be lifted slowly. When the grab bucket comes out of the mud surface, the mud should be refilled in time to ensure that the mud level is not lower than 0.50m above the foot of the guide wall and higher than the groundwater. The position is above 0.50m; the grooving operation is stopped when the rock formation is reached, and the second grabbing construction is carried out according to the mark, and the method is the same as the first grabbing;

(5b) Hole formation in the rock layer: After the soil layer formation is completed, two pile punching machines are used for each closed slot 2, and the “five-hole method” is used for punching the closed slot section. Holes K3, K4, and K5 are constructed in sequence. During the punching process, a short stroke method is adopted; if the rock surface is slope rock during punching, it is necessary to backfill schist and then punch;

(5c) After the rock formation is punched, use a pile punching machine to repair the hole with a round hammer, starting from the side of the groove section, and complete the rock between the holes in sequence;

(5d) After the hole repair with the round hammer is completed, use a pile puncher to repair the remaining rock with a square hammer, starting from one side of the groove section, and repair all the rocks in the groove wall in sequence to avoid the obstruction of the steel cage.

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

The invention provides a construction method of "three grasps with nine holes and two grasps with five holes" to form a groove on the ground connecting the wall. The first-stage groove is firstly grasped by a groove-forming machine, and each pair of the first-stage groove is grasped by the "three grasping method". For the grooves, two pile punching machines are used to punch holes at the same time, and the "nine-hole method" is used for punching the first-stage grooves of each pair; After the groove, two pile punching machines are used to punch holes at the same time, and each closed groove section is punched by the "five-hole method". . This method not only gives full play to the high efficiency of the grooving machine in the soft soil stratum, and better exerts the advantages of the ground connection wall, but also satisfies the characteristics that the pile puncher can exert its advantages in the high-strength rock stratum, and effectively It avoids the risk of slow construction progress and difficult quality control of the ground connecting wall in the special stratum with soft upper and lower hard layers. The invention provides a ground connecting wall construction method with simple process, novel method, advanced technology, good process connection continuity and controllable safety and quality.

Description of drawings

Fig. 1 is a schematic diagram of the division of a ground connecting wall of the present invention;

Figure 2 is a top view of step (3a) of the construction method of the present invention;

3 is a schematic diagram of step (3a) of the construction method of the present invention;

4 is a top view of step (3b) of the construction method of the present invention;

5 is a schematic diagram of step (3b) of the construction method of the present invention;

6 is a top view of step (3c) of the construction method of the present invention;

7 is a schematic diagram of step (3c) of the construction method of the present invention;

8 is a top view of step (3d) of the construction method of the present invention;

9 is a schematic diagram of step (3d) of the construction method of the present invention;

10 is a top view of step (5a) of the construction method of the present invention;

Figure 11 is a schematic diagram of step (5a) of the construction method of the present invention;

12 is a top view of step (5b) of the construction method of the present invention;

13 is a schematic diagram of step (5b) of the construction method of the present invention;

14 is a top view of step (5c) of the construction method of the present invention;

15 is a schematic diagram of step (5c) of the construction method of the present invention;

16 is a top view of step (5d) of the construction method of the present invention;

Fig. 17 is a schematic diagram of step (5d) of the construction method of the present invention.

In the picture: 1- first-stage groove; 2- closed groove; 3- hydraulic groove forming machine; 4- round hammer; 5- square hammer.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figure 1~Figure 9, the construction method of the "three grasps nine holes and two grasps five holes" ground connection wall construction method is suitable for the construction of all the ground connection wall structures with the upper soft and the lower hard, which not only meets the requirements of the construction period, but also meets the ground connection wall structure. Wall quality requirements. The construction method includes the following steps:

(1) For the construction of the guide wall, the construction site has a longitudinal slope along the ground elevation along the ground connecting wall. During the construction of the guide wall, the guide wall elevation shall be divided according to each pair of ground connecting walls or several adjacent ground connecting walls, which is convenient for the pile punching machine in the later stage. Erection punching and reinforcement cage elevation are effectively controlled. In order to ensure the structural limit, the thickness of the wall and the width of the groove, the guide wall is placed 15cm outside, and the clearance is increased by 6cm.

(2) During the construction of the guide wall, the production of the mud pool and the preparation of the new mud should be carried out simultaneously, and the position of the mud pool should be reasonably selected on the construction site to facilitate the use of all the ground connecting walls. The mud pool includes new mud pool, circulation pool, and waste slurry. pool. The new slurry tank is used to prepare new slurry, and it is used for standby when the slurry in the groove section is unqualified when the tank is formed; Requirements; the waste slurry pool is used to meet the requirements of the concrete floor-to-wall concrete pouring process, storing the mud and re-using the mud through the mud processor again.

(3) After the concrete strength of the guide wall reaches 75% and the preparation of the new slurry is completed, a hydraulic grooving machine 3 is used for the ground connecting wall to grasp the groove, and the first-stage groove 1 is constructed first. In the first phase, groove 1 first adopts the "three grasping method" to grasp the groove, and then uses two pile punching machines to punch the hole using the "nine hole method", and then successively uses the round hammer 4 and the square hammer 5 to repair the groove.

Said first-phase slot 1 forming slot includes the following steps:

(3a) The soil layer is grooved. The first-phase groove 1 of each pair is divided into 6 meters, and marks are set out on the guide wall as the basis for later construction. When the first-phase groove 1 is concreted, both ends are closed with locking pipes, so a hydraulic groove forming machine is used to grasp the groove. At the same time, the two sides of the groove section are expanded by 870mm, and the "three-grip method" is used for the construction of the grab groove. The first grab is constructed first, and a hydraulic grab groove machine is used to form 3 grooves. Arrange the grab grooves in the soil. When positioning the groove forming machine, the mechanical crawler should be parallel to the groove section. Every time the grab bucket is grabbed, the verticality and position of the grab bucket should be observed according to the vertical line, so that the center of the grab bucket is consistent with the center of the groove section. , and then lower the bucket until the soil surface. If the soil is hard, lift the grab bucket for about 0.8m, impact several times and then grab the soil. The bucket should be lifted slowly. When the grab bucket comes out of the mud surface, the mud should be refilled in time to ensure the mud level. Not lower than 0.50m above the foot of the guide wall and 0.50m above the groundwater level. When the grooving reaches the rock formation, the grooving operation is stopped, and the second and third grooving constructions are started according to the marks in turn. The method is the same as that of the first grooving, as shown in Figure 2-3.

(3b) Pore formation in rock formations. After the soil layer is troughed, ensure that the specific gravity of the mud in the trough section meets the requirements to prevent the trough section from collapsing. Each trough section is punched by two pile punching machines. First construct the K1 and K2 holes, then construct the K3 and K4 holes, K5 and K6 holes, K7 and K8 holes, and K9 holes in sequence. During the punching process, a short stroke is used to avoid excessive force. hole. Affects punching progress and hole quality. If the rock surface is found to be slope rock during punching, it needs to be backfilled with schist and then punched, as shown in Figure 4-5.

(3c) After the rock formation is punched, use a pile puncher to repair the hole with a round hammer 4, starting from the side of the groove section, and sequentially complete the rock between the holes, as shown in Figure 6-7.

(3d) After the hole repair with round hammer 4 is completed, use a pile puncher and square hammer 5 to repair the remaining rocks, starting from one side of the groove section, and repair all the rocks in the groove wall in sequence, so as to prevent the steel cage from being blocked, as shown in the figure 8-9.

(4) According to step (3), gradually construct 4 to 6 pairs of adjacent connecting walls.

(5) After 4 to 6 sets of connecting walls are constructed in the adjacent first-phase groove 1 and the concrete strength meets 75%, the closed groove 2 is constructed. The closed groove 2 first adopts the "two grasping method" to grasp the groove, and then uses two pile punches to punch the hole by the "five hole method", and then successively uses the round hammer 4 and the square hammer 5 to repair the groove.

The said closed groove 2 into a groove comprises the following steps:

(5a) The soil layer is grooved. Each pair of closed grooves 2 is divided into 6 meters, and marks are set out on the guide wall as a basis for later construction. When groove 1 is formed into a groove in the first phase, since the two sides are expanded by 870mm, the closed groove 2 is actually formed into a groove of 4300mm. Adopt the "two grasping method" to grasp the groove construction, construct the first grasping and the second grasping in sequence, and the groove forming method is the same as the groove 1, as shown in Figure 10-11.

(5b) Pore formation in rock formations. After the soil layer is troughed, make sure that the specific gravity of the mud in the trough section meets the requirements to prevent the trough section from collapsing. Two pile punching machines are used for each pair of closed trough 2, and the closed trough 1 is punched by the "five-hole method". First construct K1 and K2 holes, and then construct K3 holes, K4 holes, and K5 holes in sequence. The punching method is the same as slot 1, as shown in Figure 12-13.

(5c) After the rock formation is punched, use a pile puncher to repair the hole with a round hammer 4, starting from the side of the groove section, and sequentially complete the rock between the holes, as shown in Figure 14-15.

(5d) After the hole repair with round hammer 4 is completed, use a pile punching machine and square hammer 5 to repair the remaining rocks, starting from one side of the groove section, and repair all the rocks in the groove wall in sequence, so as to prevent the steel cage from being blocked, as shown in the figure 16-17.

(6) Follow step (5) to gradually construct the closed ground connecting wall.

(7) Construct the first-phase tank 1 and the closed tank 2 in the order of step (3), step (4) and step (5) to form a flow operation.

Only the preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the art, various aspects can also be made without departing from the purpose of the present invention. Various changes should be included within the protection scope of the present invention.

Claims (2)

1. a kind of "three catches nine holes and two catches five holes" ground connection wall forming groove construction method, is characterized in that, comprises the following steps: (1) For the construction of the guide wall, the construction site has a longitudinal slope along the ground elevation along the ground connecting wall. During the construction of the guide wall, the guide wall elevation shall be divided according to each pair of ground connecting walls or several adjacent ground connecting walls, and the guide wall shall be placed outside. 15cm, the headroom is increased by 6cm; (2) During the construction of the guide wall, the production of the mud pool and the preparation of new mud shall be carried out simultaneously, and the position of the mud pool shall be reasonably selected at the construction site; The mud pool includes a new mud pool, a circulating pool, and a waste mud pool; the new mud pool is used to prepare new pulp, and it is used for standby when the mud in the groove section is unqualified when the groove is formed; the circulating pool is used to replace the mud during the emptying process after the groove is formed , so that the mud can meet the requirements before the steel cage is hoisted and lowered and before the concrete is poured; the waste slurry pool is used to store the mud and reuse the mud through the mud processor again during the concrete pouring process of the concrete floor connecting wall; (3) After the concrete strength of the guide wall reaches 75% and the preparation of the new slurry is completed, a hydraulic grooving machine is used for the construction of the first-stage groove forming groove for the ground connecting wall; (4) According to step (3), gradually construct 4 to 6 pairs of adjacent connecting walls; (5) After 4 to 6 pairs of adjacent first-phase trough-ground connecting walls are constructed and the concrete strength meets 75%, the closed trough-to-trough construction shall be carried out; (6) According to step (5), gradually construct the closed ground connecting wall; (7) Construct the first-phase trough section and closed trough section in the order of step (3), step (4), and step (5) to form flow operation; In the step (5), closing the groove to form a groove includes the following steps: (5a) Formation of soil layer grooves: Each closed groove section is divided into 6 meters, and marks are set out on the guide wall. When the first-stage groove section is formed into a groove, each side is expanded by 870mm, and the closed groove section is actually formed into a groove of 4300mm. The "two grab method" is adopted for the construction of the grab groove. The first grab is constructed first, and a hydraulic grab groove forming machine is used to form the groove. When the bucket is dropped, the bucket teeth on both sides should be inserted into the soil at the same time to arrange the grab groove. When the groove forming machine is positioned , The mechanical crawler belt should be parallel to the groove section. Each time the grab bucket is grabbed, the verticality and position of the grab bucket should be observed according to the vertical line, so that the center of the grab bucket is consistent with the center of the groove section, and then the bucket is lowered to the soil surface. If the soil is hard Then lift the grab bucket 0.8m, impact several times and then grab the soil. The bucket should be lifted slowly. When the grab bucket comes out of the mud surface, the mud should be refilled in time to ensure that the mud level is not lower than 0.50m below the foot of the guide wall and 0.50m above the groundwater level. m; The grooving operation is stopped when the rock formation is reached, and the second grooving construction is carried out according to the mark, and the method is the same as that of the first grooving; (5b) Hole formation in the rock layer: After the soil layer formation is completed, two pile punching machines are used for each closed slot 2, and the “five-hole method” is used for punching the closed slot section. Holes K3, K4, and K5 are constructed in sequence. During the punching process, a short stroke method is adopted; if the rock surface is slope rock during punching, it is necessary to backfill schist and then punch; (5c) After the rock formation is punched, use a pile punching machine to repair the hole with a round hammer, starting from the side of the groove section, and complete the rock between the holes in sequence; (5d) After the hole repair with the round hammer is completed, use a pile puncher to repair the remaining rock with a square hammer, starting from one side of the groove section, and repair all the rocks in the groove wall in sequence to avoid the obstruction of the steel cage. 2. The construction method for forming a groove into a ground connection wall with "three grasping nine holes and two grasping five holes" according to claim 1, characterized in that, in the step (3), the first-stage groove forming specifically comprises the following steps : (3a) Formation of soil layer grooves: The first-phase groove section of each pair is divided into 6 meters, and marks are set out on the guide wall. When the first-phase groove concrete is poured, both ends are closed with locking pipes, and each side of the groove section is expanded outward. 870mm, using the "three-grab method" for the construction of the grab grooves, the first grab is constructed first, and a hydraulic grab groove forming machine is used to form the grooves. When dropping the bucket, the bucket teeth on both sides should be inserted into the soil at the same time to arrange the grab grooves, and the groove forming machine When positioning, the mechanical crawler should be parallel to the groove section. Every time the grab bucket is grabbed, the verticality and position of the grab bucket should be observed according to the vertical line, so that the center of the grab bucket is consistent with the center of the groove section, and then the bucket is lowered to the soil surface. If it is hard, lift the grab bucket 0.8m, and then grab the soil after impacting several times. The bucket should be lifted slowly. When the grab bucket comes out of the mud surface, the mud should be refilled in time to ensure that the mud level is not lower than 0.50m below the foot of the guide wall and higher than the groundwater. The position is 0.50m; the grooving operation is stopped when the rock formation is reached, and the second and third grooving constructions are started according to the marks in sequence, and the method is the same as that of the first grooving; (3b) Rock stratum punching: After the soil trough is completed, two pile punching machines are used for each trough section. The first stage trough section adopts the "nine-hole method" punching construction. Holes K3 and K4, holes K5 and K6, holes K7, K8, and K9 are constructed in sequence. During the punching process, a short stroke method is adopted; if the rock surface is slope rock during punching, it needs to be backfilled with schist and then punched. hole; (3c) Round hammer repairing: After the rock formation is punched, a pile puncher is used to repair the hole with a round hammer, starting from the side of the groove section, and completing the rock between the holes in sequence; (3d) After the hole repair with the round hammer is completed, use a pile puncher to repair the remaining rock with a square hammer, starting from one side of the groove section, and repair all the rocks in the groove wall in sequence to avoid the obstruction of the steel cage.

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